* [PATCH 13/18] netfilter: nf_nat: support IPv6 in FTP NAT helper
From: Patrick McHardy @ 2012-08-20 3:40 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
In-Reply-To: <1345434006-16549-1-git-send-email-kaber@trash.net>
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
net/ipv4/netfilter/Kconfig | 5 -----
net/ipv4/netfilter/Makefile | 1 -
net/netfilter/Kconfig | 5 +++++
net/netfilter/Makefile | 3 +++
net/netfilter/nf_conntrack_ftp.c | 3 +--
net/{ipv4 => }/netfilter/nf_nat_ftp.c | 30 ++++++++++++++++++------------
6 files changed, 27 insertions(+), 20 deletions(-)
rename net/{ipv4 => }/netfilter/nf_nat_ftp.c (82%)
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 33372a1..80272e7 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -220,11 +220,6 @@ config NF_NAT_PROTO_GRE
tristate
depends on NF_NAT_IPV4 && NF_CT_PROTO_GRE
-config NF_NAT_FTP
- tristate
- depends on NF_CONNTRACK && NF_NAT_IPV4
- default NF_NAT_IPV4 && NF_CONNTRACK_FTP
-
config NF_NAT_IRC
tristate
depends on NF_CONNTRACK && NF_NAT_IPV4
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 0ea3acc..4d8a4ad 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -21,7 +21,6 @@ obj-$(CONFIG_NF_DEFRAG_IPV4) += nf_defrag_ipv4.o
# NAT helpers (nf_conntrack)
obj-$(CONFIG_NF_NAT_AMANDA) += nf_nat_amanda.o
-obj-$(CONFIG_NF_NAT_FTP) += nf_nat_ftp.o
obj-$(CONFIG_NF_NAT_H323) += nf_nat_h323.o
obj-$(CONFIG_NF_NAT_IRC) += nf_nat_irc.o
obj-$(CONFIG_NF_NAT_PPTP) += nf_nat_pptp.o
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index 91addda..3104494 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -380,6 +380,11 @@ config NF_NAT_PROTO_SCTP
depends on NF_NAT && NF_CT_PROTO_SCTP
select LIBCRC32C
+config NF_NAT_FTP
+ tristate
+ depends on NF_CONNTRACK && NF_NAT
+ default NF_NAT && NF_CONNTRACK_FTP
+
endif # NF_CONNTRACK
# transparent proxy support
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 09c9451..16592b1 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -54,6 +54,9 @@ obj-$(CONFIG_NF_NAT_PROTO_DCCP) += nf_nat_proto_dccp.o
obj-$(CONFIG_NF_NAT_PROTO_UDPLITE) += nf_nat_proto_udplite.o
obj-$(CONFIG_NF_NAT_PROTO_SCTP) += nf_nat_proto_sctp.o
+# NAT helpers
+obj-$(CONFIG_NF_NAT_FTP) += nf_nat_ftp.o
+
# transparent proxy support
obj-$(CONFIG_NETFILTER_TPROXY) += nf_tproxy_core.o
diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c
index c0f4a5b..f8cc26a 100644
--- a/net/netfilter/nf_conntrack_ftp.c
+++ b/net/netfilter/nf_conntrack_ftp.c
@@ -488,8 +488,7 @@ static int help(struct sk_buff *skb,
/* Now, NAT might want to mangle the packet, and register the
* (possibly changed) expectation itself. */
nf_nat_ftp = rcu_dereference(nf_nat_ftp_hook);
- if (nf_nat_ftp && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
- ct->status & IPS_NAT_MASK)
+ if (nf_nat_ftp && ct->status & IPS_NAT_MASK)
ret = nf_nat_ftp(skb, ctinfo, search[dir][i].ftptype,
protoff, matchoff, matchlen, exp);
else {
diff --git a/net/ipv4/netfilter/nf_nat_ftp.c b/net/netfilter/nf_nat_ftp.c
similarity index 82%
rename from net/ipv4/netfilter/nf_nat_ftp.c
rename to net/netfilter/nf_nat_ftp.c
index dd5e387..e839b97 100644
--- a/net/ipv4/netfilter/nf_nat_ftp.c
+++ b/net/netfilter/nf_nat_ftp.c
@@ -10,7 +10,7 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
-#include <linux/ip.h>
+#include <linux/inet.h>
#include <linux/tcp.h>
#include <linux/netfilter_ipv4.h>
#include <net/netfilter/nf_nat.h>
@@ -26,22 +26,27 @@ MODULE_ALIAS("ip_nat_ftp");
/* FIXME: Time out? --RR */
-static int nf_nat_ftp_fmt_cmd(enum nf_ct_ftp_type type,
+static int nf_nat_ftp_fmt_cmd(struct nf_conn *ct, enum nf_ct_ftp_type type,
char *buffer, size_t buflen,
- __be32 addr, u16 port)
+ union nf_inet_addr *addr, u16 port)
{
switch (type) {
case NF_CT_FTP_PORT:
case NF_CT_FTP_PASV:
return snprintf(buffer, buflen, "%u,%u,%u,%u,%u,%u",
- ((unsigned char *)&addr)[0],
- ((unsigned char *)&addr)[1],
- ((unsigned char *)&addr)[2],
- ((unsigned char *)&addr)[3],
+ ((unsigned char *)&addr->ip)[0],
+ ((unsigned char *)&addr->ip)[1],
+ ((unsigned char *)&addr->ip)[2],
+ ((unsigned char *)&addr->ip)[3],
port >> 8,
port & 0xFF);
case NF_CT_FTP_EPRT:
- return snprintf(buffer, buflen, "|1|%pI4|%u|", &addr, port);
+ if (nf_ct_l3num(ct) == NFPROTO_IPV4)
+ return snprintf(buffer, buflen, "|1|%pI4|%u|",
+ &addr->ip, port);
+ else
+ return snprintf(buffer, buflen, "|2|%pI6|%u|",
+ &addr->ip6, port);
case NF_CT_FTP_EPSV:
return snprintf(buffer, buflen, "|||%u|", port);
}
@@ -59,17 +64,17 @@ static unsigned int nf_nat_ftp(struct sk_buff *skb,
unsigned int matchlen,
struct nf_conntrack_expect *exp)
{
- __be32 newip;
+ union nf_inet_addr newaddr;
u_int16_t port;
int dir = CTINFO2DIR(ctinfo);
struct nf_conn *ct = exp->master;
- char buffer[sizeof("|1|255.255.255.255|65535|")];
+ char buffer[sizeof("|1||65535|") + INET6_ADDRSTRLEN];
unsigned int buflen;
pr_debug("FTP_NAT: type %i, off %u len %u\n", type, matchoff, matchlen);
/* Connection will come from wherever this packet goes, hence !dir */
- newip = ct->tuplehash[!dir].tuple.dst.u3.ip;
+ newaddr = ct->tuplehash[!dir].tuple.dst.u3;
exp->saved_proto.tcp.port = exp->tuple.dst.u.tcp.port;
exp->dir = !dir;
@@ -94,7 +99,8 @@ static unsigned int nf_nat_ftp(struct sk_buff *skb,
if (port == 0)
return NF_DROP;
- buflen = nf_nat_ftp_fmt_cmd(type, buffer, sizeof(buffer), newip, port);
+ buflen = nf_nat_ftp_fmt_cmd(ct, type, buffer, sizeof(buffer),
+ &newaddr, port);
if (!buflen)
goto out;
--
1.7.1
^ permalink raw reply related
* [PATCH 12/18] netfilter: ip6tables: add NETMAP target
From: Patrick McHardy @ 2012-08-20 3:40 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
In-Reply-To: <1345434006-16549-1-git-send-email-kaber@trash.net>
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
net/ipv6/netfilter/Kconfig | 10 ++++
net/ipv6/netfilter/Makefile | 1 +
net/ipv6/netfilter/ip6t_NETMAP.c | 94 ++++++++++++++++++++++++++++++++++++++
3 files changed, 105 insertions(+), 0 deletions(-)
create mode 100644 net/ipv6/netfilter/ip6t_NETMAP.c
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index 585590f..7bdf73b 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -156,6 +156,16 @@ config IP6_NF_TARGET_MASQUERADE
To compile it as a module, choose M here. If unsure, say N.
+config IP6_NF_TARGET_NETMAP
+ tristate "NETMAP target support"
+ depends on NF_NAT_IPV6
+ help
+ NETMAP is an implementation of static 1:1 NAT mapping of network
+ addresses. It maps the network address part, while keeping the host
+ address part intact.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config IP6_NF_TARGET_REDIRECT
tristate "REDIRECT target support"
depends on NF_NAT_IPV6
diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile
index e30a531..0864ce6 100644
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -35,5 +35,6 @@ obj-$(CONFIG_IP6_NF_MATCH_RT) += ip6t_rt.o
# targets
obj-$(CONFIG_IP6_NF_TARGET_MASQUERADE) += ip6t_MASQUERADE.o
+obj-$(CONFIG_IP6_NF_TARGET_NETMAP) += ip6t_NETMAP.o
obj-$(CONFIG_IP6_NF_TARGET_REDIRECT) += ip6t_REDIRECT.o
obj-$(CONFIG_IP6_NF_TARGET_REJECT) += ip6t_REJECT.o
diff --git a/net/ipv6/netfilter/ip6t_NETMAP.c b/net/ipv6/netfilter/ip6t_NETMAP.c
new file mode 100644
index 0000000..4f3bf36
--- /dev/null
+++ b/net/ipv6/netfilter/ip6t_NETMAP.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2011 Patrick McHardy <kaber@trash.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on Svenning Soerensen's IPv4 NETMAP target. Development of IPv6
+ * NAT funded by Astaro.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/ipv6.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter/x_tables.h>
+#include <net/netfilter/nf_nat.h>
+
+static unsigned int
+netmap_tg6(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct nf_nat_range *range = par->targinfo;
+ struct nf_nat_range newrange;
+ struct nf_conn *ct;
+ enum ip_conntrack_info ctinfo;
+ union nf_inet_addr new_addr, netmask;
+ unsigned int i;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ for (i = 0; i < ARRAY_SIZE(range->min_addr.ip6); i++)
+ netmask.ip6[i] = ~(range->min_addr.ip6[i] ^
+ range->max_addr.ip6[i]);
+
+ if (par->hooknum == NF_INET_PRE_ROUTING ||
+ par->hooknum == NF_INET_LOCAL_OUT)
+ new_addr.in6 = ipv6_hdr(skb)->daddr;
+ else
+ new_addr.in6 = ipv6_hdr(skb)->saddr;
+
+ for (i = 0; i < ARRAY_SIZE(new_addr.ip6); i++) {
+ new_addr.ip6[i] &= ~netmask.ip6[i];
+ new_addr.ip6[i] |= range->min_addr.ip6[i] &
+ netmask.ip6[i];
+ }
+
+ newrange.flags = range->flags | NF_NAT_RANGE_MAP_IPS;
+ newrange.min_addr = new_addr;
+ newrange.max_addr = new_addr;
+ newrange.min_proto = range->min_proto;
+ newrange.max_proto = range->max_proto;
+
+ return nf_nat_setup_info(ct, &newrange, HOOK2MANIP(par->hooknum));
+}
+
+static int netmap_tg6_checkentry(const struct xt_tgchk_param *par)
+{
+ const struct nf_nat_range *range = par->targinfo;
+
+ if (!(range->flags & NF_NAT_RANGE_MAP_IPS))
+ return -EINVAL;
+ return 0;
+}
+
+static struct xt_target netmap_tg6_reg __read_mostly = {
+ .name = "NETMAP",
+ .family = NFPROTO_IPV6,
+ .target = netmap_tg6,
+ .targetsize = sizeof(struct nf_nat_range),
+ .table = "nat",
+ .hooks = (1 << NF_INET_PRE_ROUTING) |
+ (1 << NF_INET_POST_ROUTING) |
+ (1 << NF_INET_LOCAL_OUT) |
+ (1 << NF_INET_LOCAL_IN),
+ .checkentry = netmap_tg6_checkentry,
+ .me = THIS_MODULE,
+};
+
+static int __init netmap_tg6_init(void)
+{
+ return xt_register_target(&netmap_tg6_reg);
+}
+
+static void netmap_tg6_exit(void)
+{
+ xt_unregister_target(&netmap_tg6_reg);
+}
+
+module_init(netmap_tg6_init);
+module_exit(netmap_tg6_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Xtables: 1:1 NAT mapping of IPv6 subnets");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
--
1.7.1
^ permalink raw reply related
* [PATCH 09/18] netfilter: ipv6: add IPv6 NAT support
From: Patrick McHardy @ 2012-08-20 3:39 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
In-Reply-To: <1345434006-16549-1-git-send-email-kaber@trash.net>
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
include/linux/netfilter/nfnetlink_conntrack.h | 2 +
include/net/netfilter/nf_nat_l3proto.h | 5 +
include/net/netfilter/nf_nat_l4proto.h | 1 +
include/net/netns/ipv6.h | 1 +
net/core/secure_seq.c | 1 +
net/ipv6/netfilter/Kconfig | 12 +
net/ipv6/netfilter/Makefile | 4 +
net/ipv6/netfilter/ip6table_nat.c | 321 ++++++++++++++++++++++++
net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c | 37 +++-
net/ipv6/netfilter/nf_nat_l3proto_ipv6.c | 287 +++++++++++++++++++++
net/ipv6/netfilter/nf_nat_proto_icmpv6.c | 90 +++++++
net/netfilter/nf_nat_core.c | 2 +
net/netfilter/xt_nat.c | 3 +
13 files changed, 764 insertions(+), 2 deletions(-)
create mode 100644 net/ipv6/netfilter/ip6table_nat.c
create mode 100644 net/ipv6/netfilter/nf_nat_l3proto_ipv6.c
create mode 100644 net/ipv6/netfilter/nf_nat_proto_icmpv6.c
diff --git a/include/linux/netfilter/nfnetlink_conntrack.h b/include/linux/netfilter/nfnetlink_conntrack.h
index 68920ea..43bfe3e 100644
--- a/include/linux/netfilter/nfnetlink_conntrack.h
+++ b/include/linux/netfilter/nfnetlink_conntrack.h
@@ -147,6 +147,8 @@ enum ctattr_nat {
CTA_NAT_V4_MAXIP,
#define CTA_NAT_MAXIP CTA_NAT_V4_MAXIP
CTA_NAT_PROTO,
+ CTA_NAT_V6_MINIP,
+ CTA_NAT_V6_MAXIP,
__CTA_NAT_MAX
};
#define CTA_NAT_MAX (__CTA_NAT_MAX - 1)
diff --git a/include/net/netfilter/nf_nat_l3proto.h b/include/net/netfilter/nf_nat_l3proto.h
index 3df4a67..57d9e27 100644
--- a/include/net/netfilter/nf_nat_l3proto.h
+++ b/include/net/netfilter/nf_nat_l3proto.h
@@ -43,5 +43,10 @@ extern int nf_nat_icmp_reply_translation(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned int hooknum);
+extern int nf_nat_icmpv6_reply_translation(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int hooknum,
+ unsigned int hdrlen);
#endif /* _NF_NAT_L3PROTO_H */
diff --git a/include/net/netfilter/nf_nat_l4proto.h b/include/net/netfilter/nf_nat_l4proto.h
index 1f0a4f0..24feb68 100644
--- a/include/net/netfilter/nf_nat_l4proto.h
+++ b/include/net/netfilter/nf_nat_l4proto.h
@@ -51,6 +51,7 @@ extern const struct nf_nat_l4proto *__nf_nat_l4proto_find(u8 l3proto, u8 l4proto
extern const struct nf_nat_l4proto nf_nat_l4proto_tcp;
extern const struct nf_nat_l4proto nf_nat_l4proto_udp;
extern const struct nf_nat_l4proto nf_nat_l4proto_icmp;
+extern const struct nf_nat_l4proto nf_nat_l4proto_icmpv6;
extern const struct nf_nat_l4proto nf_nat_l4proto_unknown;
extern bool nf_nat_l4proto_in_range(const struct nf_conntrack_tuple *tuple,
diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
index df0a545..0318104 100644
--- a/include/net/netns/ipv6.h
+++ b/include/net/netns/ipv6.h
@@ -42,6 +42,7 @@ struct netns_ipv6 {
#ifdef CONFIG_SECURITY
struct xt_table *ip6table_security;
#endif
+ struct xt_table *ip6table_nat;
#endif
struct rt6_info *ip6_null_entry;
struct rt6_statistics *rt6_stats;
diff --git a/net/core/secure_seq.c b/net/core/secure_seq.c
index 99b2596..e61a8bb 100644
--- a/net/core/secure_seq.c
+++ b/net/core/secure_seq.c
@@ -76,6 +76,7 @@ u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
return hash[0];
}
+EXPORT_SYMBOL(secure_ipv6_port_ephemeral);
#endif
#ifdef CONFIG_INET
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index 1013534..b27e0ad 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -25,6 +25,18 @@ config NF_CONNTRACK_IPV6
To compile it as a module, choose M here. If unsure, say N.
+config NF_NAT_IPV6
+ tristate "IPv6 NAT"
+ depends on NF_CONNTRACK_IPV6
+ depends on NETFILTER_ADVANCED
+ select NF_NAT
+ help
+ The IPv6 NAT option allows masquerading, port forwarding and other
+ forms of full Network Address Port Translation. It is controlled by
+ the `nat' table in ip6tables, see the man page for ip6tables(8).
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config IP6_NF_IPTABLES
tristate "IP6 tables support (required for filtering)"
depends on INET && IPV6
diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile
index 534d3f2..7677937 100644
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_IP6_NF_FILTER) += ip6table_filter.o
obj-$(CONFIG_IP6_NF_MANGLE) += ip6table_mangle.o
obj-$(CONFIG_IP6_NF_RAW) += ip6table_raw.o
obj-$(CONFIG_IP6_NF_SECURITY) += ip6table_security.o
+obj-$(CONFIG_NF_NAT_IPV6) += ip6table_nat.o
# objects for l3 independent conntrack
nf_conntrack_ipv6-y := nf_conntrack_l3proto_ipv6.o nf_conntrack_proto_icmpv6.o
@@ -15,6 +16,9 @@ nf_conntrack_ipv6-y := nf_conntrack_l3proto_ipv6.o nf_conntrack_proto_icmpv6.o
# l3 independent conntrack
obj-$(CONFIG_NF_CONNTRACK_IPV6) += nf_conntrack_ipv6.o nf_defrag_ipv6.o
+nf_nat_ipv6-y := nf_nat_l3proto_ipv6.o nf_nat_proto_icmpv6.o
+obj-$(CONFIG_NF_NAT_IPV6) += nf_nat_ipv6.o
+
# defrag
nf_defrag_ipv6-y := nf_defrag_ipv6_hooks.o nf_conntrack_reasm.o
obj-$(CONFIG_NF_DEFRAG_IPV6) += nf_defrag_ipv6.o
diff --git a/net/ipv6/netfilter/ip6table_nat.c b/net/ipv6/netfilter/ip6table_nat.c
new file mode 100644
index 0000000..b3f710e
--- /dev/null
+++ b/net/ipv6/netfilter/ip6table_nat.c
@@ -0,0 +1,321 @@
+/*
+ * Copyright (c) 2011 Patrick McHardy <kaber@trash.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on Rusty Russell's IPv4 NAT code. Development of IPv6 NAT
+ * funded by Astaro.
+ */
+
+#include <linux/module.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/ipv6.h>
+#include <net/ipv6.h>
+
+#include <net/netfilter/nf_nat.h>
+#include <net/netfilter/nf_nat_core.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+
+static const struct xt_table nf_nat_ipv6_table = {
+ .name = "nat",
+ .valid_hooks = (1 << NF_INET_PRE_ROUTING) |
+ (1 << NF_INET_POST_ROUTING) |
+ (1 << NF_INET_LOCAL_OUT) |
+ (1 << NF_INET_LOCAL_IN),
+ .me = THIS_MODULE,
+ .af = NFPROTO_IPV6,
+};
+
+static unsigned int alloc_null_binding(struct nf_conn *ct, unsigned int hooknum)
+{
+ /* Force range to this IP; let proto decide mapping for
+ * per-proto parts (hence not IP_NAT_RANGE_PROTO_SPECIFIED).
+ */
+ struct nf_nat_range range;
+
+ range.flags = 0;
+ pr_debug("Allocating NULL binding for %p (%pI6)\n", ct,
+ HOOK2MANIP(hooknum) == NF_NAT_MANIP_SRC ?
+ &ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip6 :
+ &ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip6);
+
+ return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum));
+}
+
+static unsigned int nf_nat_rule_find(struct sk_buff *skb, unsigned int hooknum,
+ const struct net_device *in,
+ const struct net_device *out,
+ struct nf_conn *ct)
+{
+ struct net *net = nf_ct_net(ct);
+ unsigned int ret;
+
+ ret = ip6t_do_table(skb, hooknum, in, out, net->ipv6.ip6table_nat);
+ if (ret == NF_ACCEPT) {
+ if (!nf_nat_initialized(ct, HOOK2MANIP(hooknum)))
+ ret = alloc_null_binding(ct, hooknum);
+ }
+ return ret;
+}
+
+static unsigned int
+nf_nat_ipv6_fn(unsigned int hooknum,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct nf_conn *ct;
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn_nat *nat;
+ enum nf_nat_manip_type maniptype = HOOK2MANIP(hooknum);
+ __be16 frag_off;
+ int hdrlen;
+ u8 nexthdr;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ /* Can't track? It's not due to stress, or conntrack would
+ * have dropped it. Hence it's the user's responsibilty to
+ * packet filter it out, or implement conntrack/NAT for that
+ * protocol. 8) --RR
+ */
+ if (!ct)
+ return NF_ACCEPT;
+
+ /* Don't try to NAT if this packet is not conntracked */
+ if (nf_ct_is_untracked(ct))
+ return NF_ACCEPT;
+
+ nat = nfct_nat(ct);
+ if (!nat) {
+ /* NAT module was loaded late. */
+ if (nf_ct_is_confirmed(ct))
+ return NF_ACCEPT;
+ nat = nf_ct_ext_add(ct, NF_CT_EXT_NAT, GFP_ATOMIC);
+ if (nat == NULL) {
+ pr_debug("failed to add NAT extension\n");
+ return NF_ACCEPT;
+ }
+ }
+
+ switch (ctinfo) {
+ case IP_CT_RELATED:
+ case IP_CT_RELATED_REPLY:
+ nexthdr = ipv6_hdr(skb)->nexthdr;
+ hdrlen = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr),
+ &nexthdr, &frag_off);
+
+ if (hdrlen >= 0 && nexthdr == IPPROTO_ICMPV6) {
+ if (!nf_nat_icmpv6_reply_translation(skb, ct, ctinfo,
+ hooknum, hdrlen))
+ return NF_DROP;
+ else
+ return NF_ACCEPT;
+ }
+ /* Fall thru... (Only ICMPs can be IP_CT_IS_REPLY) */
+ case IP_CT_NEW:
+ /* Seen it before? This can happen for loopback, retrans,
+ * or local packets.
+ */
+ if (!nf_nat_initialized(ct, maniptype)) {
+ unsigned int ret;
+
+ ret = nf_nat_rule_find(skb, hooknum, in, out, ct);
+ if (ret != NF_ACCEPT)
+ return ret;
+ } else
+ pr_debug("Already setup manip %s for ct %p\n",
+ maniptype == NF_NAT_MANIP_SRC ? "SRC" : "DST",
+ ct);
+ break;
+
+ default:
+ /* ESTABLISHED */
+ NF_CT_ASSERT(ctinfo == IP_CT_ESTABLISHED ||
+ ctinfo == IP_CT_ESTABLISHED_REPLY);
+ }
+
+ return nf_nat_packet(ct, ctinfo, hooknum, skb);
+}
+
+static unsigned int
+nf_nat_ipv6_in(unsigned int hooknum,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ unsigned int ret;
+ struct in6_addr daddr = ipv6_hdr(skb)->daddr;
+
+ ret = nf_nat_ipv6_fn(hooknum, skb, in, out, okfn);
+ if (ret != NF_DROP && ret != NF_STOLEN &&
+ ipv6_addr_cmp(&daddr, &ipv6_hdr(skb)->daddr))
+ skb_dst_drop(skb);
+
+ return ret;
+}
+
+static unsigned int
+nf_nat_ipv6_out(unsigned int hooknum,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+#ifdef CONFIG_XFRM
+ const struct nf_conn *ct;
+ enum ip_conntrack_info ctinfo;
+#endif
+ unsigned int ret;
+
+ /* root is playing with raw sockets. */
+ if (skb->len < sizeof(struct ipv6hdr))
+ return NF_ACCEPT;
+
+ ret = nf_nat_ipv6_fn(hooknum, skb, in, out, okfn);
+#ifdef CONFIG_XFRM
+ if (ret != NF_DROP && ret != NF_STOLEN &&
+ !(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&
+ (ct = nf_ct_get(skb, &ctinfo)) != NULL) {
+ enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
+
+ if (!nf_inet_addr_cmp(&ct->tuplehash[dir].tuple.src.u3,
+ &ct->tuplehash[!dir].tuple.dst.u3) ||
+ (ct->tuplehash[dir].tuple.src.u.all !=
+ ct->tuplehash[!dir].tuple.dst.u.all))
+ if (nf_xfrm_me_harder(skb, AF_INET6) < 0)
+ ret = NF_DROP;
+ }
+#endif
+ return ret;
+}
+
+static unsigned int
+nf_nat_ipv6_local_fn(unsigned int hooknum,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ const struct nf_conn *ct;
+ enum ip_conntrack_info ctinfo;
+ unsigned int ret;
+
+ /* root is playing with raw sockets. */
+ if (skb->len < sizeof(struct ipv6hdr))
+ return NF_ACCEPT;
+
+ ret = nf_nat_ipv6_fn(hooknum, skb, in, out, okfn);
+ if (ret != NF_DROP && ret != NF_STOLEN &&
+ (ct = nf_ct_get(skb, &ctinfo)) != NULL) {
+ enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
+
+ if (!nf_inet_addr_cmp(&ct->tuplehash[dir].tuple.dst.u3,
+ &ct->tuplehash[!dir].tuple.src.u3)) {
+ if (ip6_route_me_harder(skb))
+ ret = NF_DROP;
+ }
+#ifdef CONFIG_XFRM
+ else if (!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&
+ ct->tuplehash[dir].tuple.dst.u.all !=
+ ct->tuplehash[!dir].tuple.src.u.all)
+ if (nf_xfrm_me_harder(skb, AF_INET6))
+ ret = NF_DROP;
+#endif
+ }
+ return ret;
+}
+
+static struct nf_hook_ops nf_nat_ipv6_ops[] __read_mostly = {
+ /* Before packet filtering, change destination */
+ {
+ .hook = nf_nat_ipv6_in,
+ .owner = THIS_MODULE,
+ .pf = NFPROTO_IPV6,
+ .hooknum = NF_INET_PRE_ROUTING,
+ .priority = NF_IP_PRI_NAT_DST,
+ },
+ /* After packet filtering, change source */
+ {
+ .hook = nf_nat_ipv6_out,
+ .owner = THIS_MODULE,
+ .pf = NFPROTO_IPV6,
+ .hooknum = NF_INET_POST_ROUTING,
+ .priority = NF_IP_PRI_NAT_SRC,
+ },
+ /* Before packet filtering, change destination */
+ {
+ .hook = nf_nat_ipv6_local_fn,
+ .owner = THIS_MODULE,
+ .pf = NFPROTO_IPV6,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = NF_IP_PRI_NAT_DST,
+ },
+ /* After packet filtering, change source */
+ {
+ .hook = nf_nat_ipv6_fn,
+ .owner = THIS_MODULE,
+ .pf = NFPROTO_IPV6,
+ .hooknum = NF_INET_LOCAL_IN,
+ .priority = NF_IP_PRI_NAT_SRC,
+ },
+};
+
+static int __net_init ip6table_nat_net_init(struct net *net)
+{
+ struct ip6t_replace *repl;
+
+ repl = ip6t_alloc_initial_table(&nf_nat_ipv6_table);
+ if (repl == NULL)
+ return -ENOMEM;
+ net->ipv6.ip6table_nat = ip6t_register_table(net, &nf_nat_ipv6_table, repl);
+ kfree(repl);
+ if (IS_ERR(net->ipv6.ip6table_nat))
+ return PTR_ERR(net->ipv6.ip6table_nat);
+ return 0;
+}
+
+static void __net_exit ip6table_nat_net_exit(struct net *net)
+{
+ ip6t_unregister_table(net, net->ipv6.ip6table_nat);
+}
+
+static struct pernet_operations ip6table_nat_net_ops = {
+ .init = ip6table_nat_net_init,
+ .exit = ip6table_nat_net_exit,
+};
+
+static int __init ip6table_nat_init(void)
+{
+ int err;
+
+ err = register_pernet_subsys(&ip6table_nat_net_ops);
+ if (err < 0)
+ goto err1;
+
+ err = nf_register_hooks(nf_nat_ipv6_ops, ARRAY_SIZE(nf_nat_ipv6_ops));
+ if (err < 0)
+ goto err2;
+ return 0;
+
+err2:
+ unregister_pernet_subsys(&ip6table_nat_net_ops);
+err1:
+ return err;
+}
+
+static void __exit ip6table_nat_exit(void)
+{
+ nf_unregister_hooks(nf_nat_ipv6_ops, ARRAY_SIZE(nf_nat_ipv6_ops));
+ unregister_pernet_subsys(&ip6table_nat_net_ops);
+}
+
+module_init(ip6table_nat_init);
+module_exit(ip6table_nat_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
index dcf6010..8860d23 100644
--- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -28,6 +28,7 @@
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
+#include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
#include <net/netfilter/nf_log.h>
@@ -142,6 +143,36 @@ static unsigned int ipv6_confirm(unsigned int hooknum,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
+ struct nf_conn *ct;
+ enum ip_conntrack_info ctinfo;
+ unsigned char pnum = ipv6_hdr(skb)->nexthdr;
+ int protoff;
+ __be16 frag_off;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ if (!ct || ctinfo == IP_CT_RELATED_REPLY)
+ goto out;
+
+ protoff = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &pnum,
+ &frag_off);
+ if (protoff < 0 || (frag_off & htons(~0x7)) != 0) {
+ pr_debug("proto header not found\n");
+ goto out;
+ }
+
+ /* adjust seqs for loopback traffic only in outgoing direction */
+ if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status) &&
+ !nf_is_loopback_packet(skb)) {
+ typeof(nf_nat_seq_adjust_hook) seq_adjust;
+
+ seq_adjust = rcu_dereference(nf_nat_seq_adjust_hook);
+ if (!seq_adjust ||
+ !seq_adjust(skb, ct, ctinfo, protoff)) {
+ NF_CT_STAT_INC_ATOMIC(nf_ct_net(ct), drop);
+ return NF_DROP;
+ }
+ }
+out:
/* We've seen it coming out the other side: confirm it */
return nf_conntrack_confirm(skb);
}
@@ -170,12 +201,14 @@ static unsigned int __ipv6_conntrack_in(struct net *net,
}
/* Conntrack helpers need the entire reassembled packet in the
- * POST_ROUTING hook.
+ * POST_ROUTING hook. In case of unconfirmed connections NAT
+ * might reassign a helper, so the entire packet is also
+ * required.
*/
ct = nf_ct_get(reasm, &ctinfo);
if (ct != NULL && !nf_ct_is_untracked(ct)) {
help = nfct_help(ct);
- if (help && help->helper) {
+ if ((help && help->helper) || !nf_ct_is_confirmed(ct)) {
nf_conntrack_get_reasm(skb);
NF_HOOK_THRESH(NFPROTO_IPV6, hooknum, reasm,
(struct net_device *)in,
diff --git a/net/ipv6/netfilter/nf_nat_l3proto_ipv6.c b/net/ipv6/netfilter/nf_nat_l3proto_ipv6.c
new file mode 100644
index 0000000..4d42eaa
--- /dev/null
+++ b/net/ipv6/netfilter/nf_nat_l3proto_ipv6.c
@@ -0,0 +1,287 @@
+/*
+ * Copyright (c) 2011 Patrick McHardy <kaber@trash.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Development of IPv6 NAT funded by Astaro.
+ */
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ipv6.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+#include <net/secure_seq.h>
+#include <net/checksum.h>
+#include <net/ip6_route.h>
+#include <net/ipv6.h>
+
+#include <net/netfilter/nf_conntrack_core.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_nat_core.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/netfilter/nf_nat_l4proto.h>
+
+static const struct nf_nat_l3proto nf_nat_l3proto_ipv6;
+
+#ifdef CONFIG_XFRM
+static void nf_nat_ipv6_decode_session(struct sk_buff *skb,
+ const struct nf_conn *ct,
+ enum ip_conntrack_dir dir,
+ unsigned long statusbit,
+ struct flowi *fl)
+{
+ const struct nf_conntrack_tuple *t = &ct->tuplehash[dir].tuple;
+ struct flowi6 *fl6 = &fl->u.ip6;
+
+ if (ct->status & statusbit) {
+ fl6->daddr = t->dst.u3.in6;
+ if (t->dst.protonum == IPPROTO_TCP ||
+ t->dst.protonum == IPPROTO_UDP ||
+ t->dst.protonum == IPPROTO_UDPLITE ||
+ t->dst.protonum == IPPROTO_DCCP ||
+ t->dst.protonum == IPPROTO_SCTP)
+ fl6->fl6_dport = t->dst.u.all;
+ }
+
+ statusbit ^= IPS_NAT_MASK;
+
+ if (ct->status & statusbit) {
+ fl6->saddr = t->src.u3.in6;
+ if (t->dst.protonum == IPPROTO_TCP ||
+ t->dst.protonum == IPPROTO_UDP ||
+ t->dst.protonum == IPPROTO_UDPLITE ||
+ t->dst.protonum == IPPROTO_DCCP ||
+ t->dst.protonum == IPPROTO_SCTP)
+ fl6->fl6_sport = t->src.u.all;
+ }
+}
+#endif
+
+static int nf_nat_ipv6_in_range(const struct nf_conntrack_tuple *t,
+ const struct nf_nat_range *range)
+{
+ return ipv6_addr_cmp(&t->src.u3.in6, &range->min_addr.in6) >= 0 &&
+ ipv6_addr_cmp(&t->src.u3.in6, &range->max_addr.in6) <= 0;
+}
+
+static u32 nf_nat_ipv6_secure_port(const struct nf_conntrack_tuple *t,
+ __be16 dport)
+{
+ return secure_ipv6_port_ephemeral(t->src.u3.ip6, t->dst.u3.ip6, dport);
+}
+
+static bool nf_nat_ipv6_manip_pkt(struct sk_buff *skb,
+ unsigned int iphdroff,
+ const struct nf_nat_l4proto *l4proto,
+ const struct nf_conntrack_tuple *target,
+ enum nf_nat_manip_type maniptype)
+{
+ struct ipv6hdr *ipv6h;
+ __be16 frag_off;
+ int hdroff;
+ u8 nexthdr;
+
+ if (!skb_make_writable(skb, iphdroff + sizeof(*ipv6h)))
+ return false;
+
+ ipv6h = (void *)skb->data + iphdroff;
+ nexthdr = ipv6h->nexthdr;
+ hdroff = ipv6_skip_exthdr(skb, iphdroff + sizeof(*ipv6h),
+ &nexthdr, &frag_off);
+ if (hdroff < 0)
+ goto manip_addr;
+
+ if ((frag_off & htons(~0x7)) == 0 &&
+ !l4proto->manip_pkt(skb, &nf_nat_l3proto_ipv6, iphdroff, hdroff,
+ target, maniptype))
+ return false;
+manip_addr:
+ if (maniptype == NF_NAT_MANIP_SRC)
+ ipv6h->saddr = target->src.u3.in6;
+ else
+ ipv6h->daddr = target->dst.u3.in6;
+
+ return true;
+}
+
+static void nf_nat_ipv6_csum_update(struct sk_buff *skb,
+ unsigned int iphdroff, __sum16 *check,
+ const struct nf_conntrack_tuple *t,
+ enum nf_nat_manip_type maniptype)
+{
+ const struct ipv6hdr *ipv6h = (struct ipv6hdr *)(skb->data + iphdroff);
+ const struct in6_addr *oldip, *newip;
+
+ if (maniptype == NF_NAT_MANIP_SRC) {
+ oldip = &ipv6h->saddr;
+ newip = &t->src.u3.in6;
+ } else {
+ oldip = &ipv6h->daddr;
+ newip = &t->dst.u3.in6;
+ }
+ inet_proto_csum_replace16(check, skb, oldip->s6_addr32,
+ newip->s6_addr32, 1);
+}
+
+static void nf_nat_ipv6_csum_recalc(struct sk_buff *skb,
+ u8 proto, void *data, __sum16 *check,
+ int datalen, int oldlen)
+{
+ const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
+ struct rt6_info *rt = (struct rt6_info *)skb_dst(skb);
+
+ if (skb->ip_summed != CHECKSUM_PARTIAL) {
+ if (!(rt->rt6i_flags & RTF_LOCAL) &&
+ (!skb->dev || skb->dev->features & NETIF_F_V6_CSUM)) {
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->csum_start = skb_headroom(skb) +
+ skb_network_offset(skb) +
+ (data - (void *)skb->data);
+ skb->csum_offset = (void *)check - data;
+ *check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr,
+ datalen, proto, 0);
+ } else {
+ *check = 0;
+ *check = csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr,
+ datalen, proto,
+ csum_partial(data, datalen,
+ 0));
+ if (proto == IPPROTO_UDP && !*check)
+ *check = CSUM_MANGLED_0;
+ }
+ } else
+ inet_proto_csum_replace2(check, skb,
+ htons(oldlen), htons(datalen), 1);
+}
+
+static int nf_nat_ipv6_nlattr_to_range(struct nlattr *tb[],
+ struct nf_nat_range *range)
+{
+ if (tb[CTA_NAT_V6_MINIP]) {
+ nla_memcpy(&range->min_addr.ip6, tb[CTA_NAT_V6_MINIP],
+ sizeof(struct in6_addr));
+ range->flags |= NF_NAT_RANGE_MAP_IPS;
+ }
+
+ if (tb[CTA_NAT_V6_MAXIP])
+ nla_memcpy(&range->max_addr.ip6, tb[CTA_NAT_V6_MAXIP],
+ sizeof(struct in6_addr));
+ else
+ range->max_addr = range->min_addr;
+
+ return 0;
+}
+
+static const struct nf_nat_l3proto nf_nat_l3proto_ipv6 = {
+ .l3proto = NFPROTO_IPV6,
+ .secure_port = nf_nat_ipv6_secure_port,
+ .in_range = nf_nat_ipv6_in_range,
+ .manip_pkt = nf_nat_ipv6_manip_pkt,
+ .csum_update = nf_nat_ipv6_csum_update,
+ .csum_recalc = nf_nat_ipv6_csum_recalc,
+ .nlattr_to_range = nf_nat_ipv6_nlattr_to_range,
+#ifdef CONFIG_XFRM
+ .decode_session = nf_nat_ipv6_decode_session,
+#endif
+};
+
+int nf_nat_icmpv6_reply_translation(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int hooknum,
+ unsigned int hdrlen)
+{
+ struct {
+ struct icmp6hdr icmp6;
+ struct ipv6hdr ip6;
+ } *inside;
+ enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
+ enum nf_nat_manip_type manip = HOOK2MANIP(hooknum);
+ const struct nf_nat_l4proto *l4proto;
+ struct nf_conntrack_tuple target;
+ unsigned long statusbit;
+
+ NF_CT_ASSERT(ctinfo == IP_CT_RELATED || ctinfo == IP_CT_RELATED_REPLY);
+
+ if (!skb_make_writable(skb, hdrlen + sizeof(*inside)))
+ return 0;
+ if (nf_ip6_checksum(skb, hooknum, hdrlen, IPPROTO_ICMPV6))
+ return 0;
+
+ inside = (void *)skb->data + hdrlen;
+ if (inside->icmp6.icmp6_type == NDISC_REDIRECT) {
+ if ((ct->status & IPS_NAT_DONE_MASK) != IPS_NAT_DONE_MASK)
+ return 0;
+ if (ct->status & IPS_NAT_MASK)
+ return 0;
+ }
+
+ if (manip == NF_NAT_MANIP_SRC)
+ statusbit = IPS_SRC_NAT;
+ else
+ statusbit = IPS_DST_NAT;
+
+ /* Invert if this is reply direction */
+ if (dir == IP_CT_DIR_REPLY)
+ statusbit ^= IPS_NAT_MASK;
+
+ if (!(ct->status & statusbit))
+ return 1;
+
+ l4proto = __nf_nat_l4proto_find(NFPROTO_IPV6, inside->ip6.nexthdr);
+ if (!nf_nat_ipv6_manip_pkt(skb, hdrlen + sizeof(inside->icmp6),
+ l4proto, &ct->tuplehash[!dir].tuple, !manip))
+ return 0;
+
+ if (skb->ip_summed != CHECKSUM_PARTIAL) {
+ struct ipv6hdr *ipv6h = ipv6_hdr(skb);
+ inside = (void *)skb->data + hdrlen;
+ inside->icmp6.icmp6_cksum = 0;
+ inside->icmp6.icmp6_cksum =
+ csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr,
+ skb->len - hdrlen, IPPROTO_ICMPV6,
+ csum_partial(&inside->icmp6,
+ skb->len - hdrlen, 0));
+ }
+
+ nf_ct_invert_tuplepr(&target, &ct->tuplehash[!dir].tuple);
+ l4proto = __nf_nat_l4proto_find(NFPROTO_IPV6, IPPROTO_ICMPV6);
+ if (!nf_nat_ipv6_manip_pkt(skb, 0, l4proto, &target, manip))
+ return 0;
+
+ return 1;
+}
+EXPORT_SYMBOL_GPL(nf_nat_icmpv6_reply_translation);
+
+static int __init nf_nat_l3proto_ipv6_init(void)
+{
+ int err;
+
+ err = nf_nat_l4proto_register(NFPROTO_IPV6, &nf_nat_l4proto_icmpv6);
+ if (err < 0)
+ goto err1;
+ err = nf_nat_l3proto_register(&nf_nat_l3proto_ipv6);
+ if (err < 0)
+ goto err2;
+ return err;
+
+err2:
+ nf_nat_l4proto_unregister(NFPROTO_IPV6, &nf_nat_l4proto_icmpv6);
+err1:
+ return err;
+}
+
+static void __exit nf_nat_l3proto_ipv6_exit(void)
+{
+ nf_nat_l3proto_unregister(&nf_nat_l3proto_ipv6);
+ nf_nat_l4proto_unregister(NFPROTO_IPV6, &nf_nat_l4proto_icmpv6);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("nf-nat-" __stringify(AF_INET6));
+
+module_init(nf_nat_l3proto_ipv6_init);
+module_exit(nf_nat_l3proto_ipv6_exit);
diff --git a/net/ipv6/netfilter/nf_nat_proto_icmpv6.c b/net/ipv6/netfilter/nf_nat_proto_icmpv6.c
new file mode 100644
index 0000000..5d6da78
--- /dev/null
+++ b/net/ipv6/netfilter/nf_nat_proto_icmpv6.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2011 Patrick Mchardy <kaber@trash.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on Rusty Russell's IPv4 ICMP NAT code. Development of IPv6
+ * NAT funded by Astaro.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/icmpv6.h>
+
+#include <linux/netfilter.h>
+#include <net/netfilter/nf_nat.h>
+#include <net/netfilter/nf_nat_core.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/netfilter/nf_nat_l4proto.h>
+
+static bool
+icmpv6_in_range(const struct nf_conntrack_tuple *tuple,
+ enum nf_nat_manip_type maniptype,
+ const union nf_conntrack_man_proto *min,
+ const union nf_conntrack_man_proto *max)
+{
+ return ntohs(tuple->src.u.icmp.id) >= ntohs(min->icmp.id) &&
+ ntohs(tuple->src.u.icmp.id) <= ntohs(max->icmp.id);
+}
+
+static void
+icmpv6_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
+ enum nf_nat_manip_type maniptype,
+ const struct nf_conn *ct)
+{
+ static u16 id;
+ unsigned int range_size;
+ unsigned int i;
+
+ range_size = ntohs(range->max_proto.icmp.id) -
+ ntohs(range->min_proto.icmp.id) + 1;
+
+ if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED))
+ range_size = 0xffff;
+
+ for (i = 0; ; ++id) {
+ tuple->src.u.icmp.id = htons(ntohs(range->min_proto.icmp.id) +
+ (id % range_size));
+ if (++i == range_size || !nf_nat_used_tuple(tuple, ct))
+ return;
+ }
+}
+
+static bool
+icmpv6_manip_pkt(struct sk_buff *skb,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
+ const struct nf_conntrack_tuple *tuple,
+ enum nf_nat_manip_type maniptype)
+{
+ struct icmp6hdr *hdr;
+
+ if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
+ return false;
+
+ hdr = (struct icmp6hdr *)(skb->data + hdroff);
+ l3proto->csum_update(skb, iphdroff, &hdr->icmp6_cksum,
+ tuple, maniptype);
+ if (hdr->icmp6_code == ICMPV6_ECHO_REQUEST ||
+ hdr->icmp6_code == ICMPV6_ECHO_REPLY) {
+ inet_proto_csum_replace2(&hdr->icmp6_cksum, skb,
+ hdr->icmp6_identifier,
+ tuple->src.u.icmp.id, 0);
+ hdr->icmp6_identifier = tuple->src.u.icmp.id;
+ }
+ return true;
+}
+
+const struct nf_nat_l4proto nf_nat_l4proto_icmpv6 = {
+ .l4proto = IPPROTO_ICMPV6,
+ .manip_pkt = icmpv6_manip_pkt,
+ .in_range = icmpv6_in_range,
+ .unique_tuple = icmpv6_unique_tuple,
+#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+ .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
+#endif
+};
diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index 7d5531e..e8e4927 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -696,6 +696,8 @@ static int nfnetlink_parse_nat_proto(struct nlattr *attr,
static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = {
[CTA_NAT_V4_MINIP] = { .type = NLA_U32 },
[CTA_NAT_V4_MAXIP] = { .type = NLA_U32 },
+ [CTA_NAT_V6_MINIP] = { .len = sizeof(struct in6_addr) },
+ [CTA_NAT_V6_MAXIP] = { .len = sizeof(struct in6_addr) },
[CTA_NAT_PROTO] = { .type = NLA_NESTED },
};
diff --git a/net/netfilter/xt_nat.c b/net/netfilter/xt_nat.c
index 7521368..81aafa8 100644
--- a/net/netfilter/xt_nat.c
+++ b/net/netfilter/xt_nat.c
@@ -163,5 +163,8 @@ module_init(xt_nat_init);
module_exit(xt_nat_exit);
MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_ALIAS("ipt_SNAT");
MODULE_ALIAS("ipt_DNAT");
+MODULE_ALIAS("ip6t_SNAT");
+MODULE_ALIAS("ip6t_DNAT");
--
1.7.1
^ permalink raw reply related
* [PATCH 08/18] net: core: add function for incremental IPv6 pseudo header checksum updates
From: Patrick McHardy @ 2012-08-20 3:39 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
In-Reply-To: <1345434006-16549-1-git-send-email-kaber@trash.net>
Add inet_proto_csum_replace16 for incrementally updating IPv6 pseudo header
checksums for IPv6 NAT.
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
include/net/checksum.h | 3 +++
net/core/utils.c | 20 ++++++++++++++++++++
2 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/include/net/checksum.h b/include/net/checksum.h
index ba55d8b..600d1d7 100644
--- a/include/net/checksum.h
+++ b/include/net/checksum.h
@@ -109,6 +109,9 @@ static inline void csum_replace2(__sum16 *sum, __be16 from, __be16 to)
struct sk_buff;
extern void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
__be32 from, __be32 to, int pseudohdr);
+extern void inet_proto_csum_replace16(__sum16 *sum, struct sk_buff *skb,
+ const __be32 *from, const __be32 *to,
+ int pseudohdr);
static inline void inet_proto_csum_replace2(__sum16 *sum, struct sk_buff *skb,
__be16 from, __be16 to,
diff --git a/net/core/utils.c b/net/core/utils.c
index 39895a6..f5613d5 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -294,6 +294,26 @@ void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
}
EXPORT_SYMBOL(inet_proto_csum_replace4);
+void inet_proto_csum_replace16(__sum16 *sum, struct sk_buff *skb,
+ const __be32 *from, const __be32 *to,
+ int pseudohdr)
+{
+ __be32 diff[] = {
+ ~from[0], ~from[1], ~from[2], ~from[3],
+ to[0], to[1], to[2], to[3],
+ };
+ if (skb->ip_summed != CHECKSUM_PARTIAL) {
+ *sum = csum_fold(csum_partial(diff, sizeof(diff),
+ ~csum_unfold(*sum)));
+ if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
+ skb->csum = ~csum_partial(diff, sizeof(diff),
+ ~skb->csum);
+ } else if (pseudohdr)
+ *sum = ~csum_fold(csum_partial(diff, sizeof(diff),
+ csum_unfold(*sum)));
+}
+EXPORT_SYMBOL(inet_proto_csum_replace16);
+
int mac_pton(const char *s, u8 *mac)
{
int i;
--
1.7.1
^ permalink raw reply related
* [PATCH 07/18] netfilter: ipv6: expand skb head in ip6_route_me_harder after oif change
From: Patrick McHardy @ 2012-08-20 3:39 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
In-Reply-To: <1345434006-16549-1-git-send-email-kaber@trash.net>
Expand the skb headroom if the oif changed due to rerouting similar to
how IPv4 packets are handled.
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
net/ipv6/netfilter.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index db31561..429089c 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -15,6 +15,7 @@ int ip6_route_me_harder(struct sk_buff *skb)
{
struct net *net = dev_net(skb_dst(skb)->dev);
const struct ipv6hdr *iph = ipv6_hdr(skb);
+ unsigned int hh_len;
struct dst_entry *dst;
struct flowi6 fl6 = {
.flowi6_oif = skb->sk ? skb->sk->sk_bound_dev_if : 0,
@@ -47,6 +48,13 @@ int ip6_route_me_harder(struct sk_buff *skb)
}
#endif
+ /* Change in oif may mean change in hh_len. */
+ hh_len = skb_dst(skb)->dev->hard_header_len;
+ if (skb_headroom(skb) < hh_len &&
+ pskb_expand_head(skb, HH_DATA_ALIGN(hh_len - skb_headroom(skb)),
+ 0, GFP_ATOMIC))
+ return -1;
+
return 0;
}
EXPORT_SYMBOL(ip6_route_me_harder);
--
1.7.1
^ permalink raw reply related
* [PATCH 06/18] netfilter: add protocol independant NAT core
From: Patrick McHardy @ 2012-08-20 3:39 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
In-Reply-To: <1345434006-16549-1-git-send-email-kaber@trash.net>
Convert the IPv4 NAT implementation to a protocol independant core and
address family specific modules.
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
include/linux/netfilter.h | 14 +-
include/linux/netfilter/nf_nat.h | 8 +
include/linux/netfilter/nfnetlink_conntrack.h | 6 +-
include/linux/netfilter_ipv4.h | 1 -
include/net/netfilter/nf_conntrack_expect.h | 2 +-
include/net/netfilter/nf_nat.h | 2 +-
include/net/netfilter/nf_nat_core.h | 5 +-
include/net/netfilter/nf_nat_l3proto.h | 47 ++
include/net/netfilter/nf_nat_l4proto.h | 71 ++
include/net/netfilter/nf_nat_protocol.h | 67 --
include/net/netfilter/nf_nat_rule.h | 15 -
include/net/netns/conntrack.h | 4 +
include/net/netns/ipv4.h | 2 -
net/ipv4/netfilter.c | 37 --
net/ipv4/netfilter/Kconfig | 65 +--
net/ipv4/netfilter/Makefile | 11 +-
net/ipv4/netfilter/ipt_MASQUERADE.c | 15 +-
net/ipv4/netfilter/ipt_NETMAP.c | 15 +-
net/ipv4/netfilter/ipt_REDIRECT.c | 15 +-
.../{nf_nat_standalone.c => iptable_nat.c} | 264 ++++----
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 6 -
net/ipv4/netfilter/nf_nat_amanda.c | 1 -
net/ipv4/netfilter/nf_nat_ftp.c | 1 -
net/ipv4/netfilter/nf_nat_h323.c | 23 +-
net/ipv4/netfilter/nf_nat_irc.c | 1 -
net/ipv4/netfilter/nf_nat_l3proto_ipv4.c | 281 ++++++++
net/ipv4/netfilter/nf_nat_pptp.c | 15 +-
net/ipv4/netfilter/nf_nat_proto_gre.c | 30 +-
net/ipv4/netfilter/nf_nat_proto_icmp.c | 24 +-
net/ipv4/netfilter/nf_nat_rule.c | 214 -------
net/ipv4/netfilter/nf_nat_sip.c | 19 +-
net/ipv4/netfilter/nf_nat_tftp.c | 1 -
net/netfilter/Kconfig | 24 +
net/netfilter/Makefile | 11 +
net/netfilter/core.c | 5 +
net/netfilter/nf_conntrack_core.c | 6 +
net/netfilter/nf_conntrack_netlink.c | 35 +-
net/netfilter/nf_conntrack_proto_tcp.c | 8 +-
net/netfilter/nf_conntrack_sip.c | 6 +-
net/{ipv4 => }/netfilter/nf_nat_core.c | 673 +++++++++++---------
net/{ipv4 => }/netfilter/nf_nat_helper.c | 100 ++--
net/{ipv4 => }/netfilter/nf_nat_proto_common.c | 54 +-
net/{ipv4 => }/netfilter/nf_nat_proto_dccp.c | 56 +-
net/{ipv4 => }/netfilter/nf_nat_proto_sctp.c | 53 +-
net/{ipv4 => }/netfilter/nf_nat_proto_tcp.c | 40 +-
net/{ipv4 => }/netfilter/nf_nat_proto_udp.c | 42 +-
net/{ipv4 => }/netfilter/nf_nat_proto_udplite.c | 58 +-
net/{ipv4 => }/netfilter/nf_nat_proto_unknown.c | 16 +-
net/netfilter/xt_nat.c | 167 +++++
49 files changed, 1495 insertions(+), 1141 deletions(-)
create mode 100644 include/net/netfilter/nf_nat_l3proto.h
create mode 100644 include/net/netfilter/nf_nat_l4proto.h
delete mode 100644 include/net/netfilter/nf_nat_protocol.h
delete mode 100644 include/net/netfilter/nf_nat_rule.h
rename net/ipv4/netfilter/{nf_nat_standalone.c => iptable_nat.c} (52%)
create mode 100644 net/ipv4/netfilter/nf_nat_l3proto_ipv4.c
delete mode 100644 net/ipv4/netfilter/nf_nat_rule.c
rename net/{ipv4 => }/netfilter/nf_nat_core.c (51%)
rename net/{ipv4 => }/netfilter/nf_nat_helper.c (83%)
rename net/{ipv4 => }/netfilter/nf_nat_proto_common.c (62%)
rename net/{ipv4 => }/netfilter/nf_nat_proto_dccp.c (61%)
rename net/{ipv4 => }/netfilter/nf_nat_proto_sctp.c (61%)
rename net/{ipv4 => }/netfilter/nf_nat_proto_tcp.c (65%)
rename net/{ipv4 => }/netfilter/nf_nat_proto_udp.c (60%)
rename net/{ipv4 => }/netfilter/nf_nat_proto_udplite.c (58%)
rename net/{ipv4 => }/netfilter/nf_nat_proto_unknown.c (76%)
create mode 100644 net/netfilter/xt_nat.c
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index c613cf0..1dcf2a3 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -342,7 +342,7 @@ extern int nf_register_afinfo(const struct nf_afinfo *afinfo);
extern void nf_unregister_afinfo(const struct nf_afinfo *afinfo);
#include <net/flow.h>
-extern void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *);
+extern void (*nf_nat_decode_session_hook)(struct sk_buff *, struct flowi *);
static inline void
nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family)
@@ -350,13 +350,11 @@ nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family)
#ifdef CONFIG_NF_NAT_NEEDED
void (*decodefn)(struct sk_buff *, struct flowi *);
- if (family == AF_INET) {
- rcu_read_lock();
- decodefn = rcu_dereference(ip_nat_decode_session);
- if (decodefn)
- decodefn(skb, fl);
- rcu_read_unlock();
- }
+ rcu_read_lock();
+ decodefn = rcu_dereference(nf_nat_decode_session_hook);
+ if (decodefn)
+ decodefn(skb, fl);
+ rcu_read_unlock();
#endif
}
diff --git a/include/linux/netfilter/nf_nat.h b/include/linux/netfilter/nf_nat.h
index 8df2d13..bf0cc37 100644
--- a/include/linux/netfilter/nf_nat.h
+++ b/include/linux/netfilter/nf_nat.h
@@ -22,4 +22,12 @@ struct nf_nat_ipv4_multi_range_compat {
struct nf_nat_ipv4_range range[1];
};
+struct nf_nat_range {
+ unsigned int flags;
+ union nf_inet_addr min_addr;
+ union nf_inet_addr max_addr;
+ union nf_conntrack_man_proto min_proto;
+ union nf_conntrack_man_proto max_proto;
+};
+
#endif /* _NETFILTER_NF_NAT_H */
diff --git a/include/linux/netfilter/nfnetlink_conntrack.h b/include/linux/netfilter/nfnetlink_conntrack.h
index f649f74..68920ea 100644
--- a/include/linux/netfilter/nfnetlink_conntrack.h
+++ b/include/linux/netfilter/nfnetlink_conntrack.h
@@ -142,8 +142,10 @@ enum ctattr_tstamp {
enum ctattr_nat {
CTA_NAT_UNSPEC,
- CTA_NAT_MINIP,
- CTA_NAT_MAXIP,
+ CTA_NAT_V4_MINIP,
+#define CTA_NAT_MINIP CTA_NAT_V4_MINIP
+ CTA_NAT_V4_MAXIP,
+#define CTA_NAT_MAXIP CTA_NAT_V4_MAXIP
CTA_NAT_PROTO,
__CTA_NAT_MAX
};
diff --git a/include/linux/netfilter_ipv4.h b/include/linux/netfilter_ipv4.h
index e2b1280..b962dfc 100644
--- a/include/linux/netfilter_ipv4.h
+++ b/include/linux/netfilter_ipv4.h
@@ -79,7 +79,6 @@ enum nf_ip_hook_priorities {
#ifdef __KERNEL__
extern int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type);
-extern int ip_xfrm_me_harder(struct sk_buff *skb);
extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
unsigned int dataoff, u_int8_t protocol);
#endif /*__KERNEL__*/
diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h
index 983f002..cc13f37 100644
--- a/include/net/netfilter/nf_conntrack_expect.h
+++ b/include/net/netfilter/nf_conntrack_expect.h
@@ -43,7 +43,7 @@ struct nf_conntrack_expect {
unsigned int class;
#ifdef CONFIG_NF_NAT_NEEDED
- __be32 saved_ip;
+ union nf_inet_addr saved_addr;
/* This is the original per-proto part, used to map the
* expected connection the way the recipient expects. */
union nf_conntrack_man_proto saved_proto;
diff --git a/include/net/netfilter/nf_nat.h b/include/net/netfilter/nf_nat.h
index b4de990..1752f13 100644
--- a/include/net/netfilter/nf_nat.h
+++ b/include/net/netfilter/nf_nat.h
@@ -50,7 +50,7 @@ struct nf_conn_nat {
/* Set up the info structure to map into this range. */
extern unsigned int nf_nat_setup_info(struct nf_conn *ct,
- const struct nf_nat_ipv4_range *range,
+ const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype);
/* Is this tuple already taken? (not by us)*/
diff --git a/include/net/netfilter/nf_nat_core.h b/include/net/netfilter/nf_nat_core.h
index b13d8d1..972e1e4 100644
--- a/include/net/netfilter/nf_nat_core.h
+++ b/include/net/netfilter/nf_nat_core.h
@@ -12,10 +12,7 @@ extern unsigned int nf_nat_packet(struct nf_conn *ct,
unsigned int hooknum,
struct sk_buff *skb);
-extern int nf_nat_icmp_reply_translation(struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int hooknum,
- struct sk_buff *skb);
+extern int nf_xfrm_me_harder(struct sk_buff *skb, unsigned int family);
static inline int nf_nat_initialized(struct nf_conn *ct,
enum nf_nat_manip_type manip)
diff --git a/include/net/netfilter/nf_nat_l3proto.h b/include/net/netfilter/nf_nat_l3proto.h
new file mode 100644
index 0000000..3df4a67
--- /dev/null
+++ b/include/net/netfilter/nf_nat_l3proto.h
@@ -0,0 +1,47 @@
+#ifndef _NF_NAT_L3PROTO_H
+#define _NF_NAT_L3PROTO_H
+
+struct nf_nat_l4proto;
+struct nf_nat_l3proto {
+ u8 l3proto;
+
+ int (*in_range)(const struct nf_conntrack_tuple *t,
+ const struct nf_nat_range *range);
+
+ u32 (*secure_port)(const struct nf_conntrack_tuple *t, __be16);
+
+ bool (*manip_pkt)(struct sk_buff *skb,
+ unsigned int iphdroff,
+ const struct nf_nat_l4proto *l4proto,
+ const struct nf_conntrack_tuple *target,
+ enum nf_nat_manip_type maniptype);
+
+ void (*csum_update)(struct sk_buff *skb, unsigned int iphdroff,
+ __sum16 *check,
+ const struct nf_conntrack_tuple *t,
+ enum nf_nat_manip_type maniptype);
+
+ void (*csum_recalc)(struct sk_buff *skb, u8 proto,
+ void *data, __sum16 *check,
+ int datalen, int oldlen);
+
+ void (*decode_session)(struct sk_buff *skb,
+ const struct nf_conn *ct,
+ enum ip_conntrack_dir dir,
+ unsigned long statusbit,
+ struct flowi *fl);
+
+ int (*nlattr_to_range)(struct nlattr *tb[],
+ struct nf_nat_range *range);
+};
+
+extern int nf_nat_l3proto_register(const struct nf_nat_l3proto *);
+extern void nf_nat_l3proto_unregister(const struct nf_nat_l3proto *);
+extern const struct nf_nat_l3proto *__nf_nat_l3proto_find(u8 l3proto);
+
+extern int nf_nat_icmp_reply_translation(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int hooknum);
+
+#endif /* _NF_NAT_L3PROTO_H */
diff --git a/include/net/netfilter/nf_nat_l4proto.h b/include/net/netfilter/nf_nat_l4proto.h
new file mode 100644
index 0000000..1f0a4f0
--- /dev/null
+++ b/include/net/netfilter/nf_nat_l4proto.h
@@ -0,0 +1,71 @@
+/* Header for use in defining a given protocol. */
+#ifndef _NF_NAT_L4PROTO_H
+#define _NF_NAT_L4PROTO_H
+#include <net/netfilter/nf_nat.h>
+#include <linux/netfilter/nfnetlink_conntrack.h>
+
+struct nf_nat_range;
+struct nf_nat_l3proto;
+
+struct nf_nat_l4proto {
+ /* Protocol number. */
+ u8 l4proto;
+
+ /* Translate a packet to the target according to manip type.
+ * Return true if succeeded.
+ */
+ bool (*manip_pkt)(struct sk_buff *skb,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
+ const struct nf_conntrack_tuple *tuple,
+ enum nf_nat_manip_type maniptype);
+
+ /* Is the manipable part of the tuple between min and max incl? */
+ bool (*in_range)(const struct nf_conntrack_tuple *tuple,
+ enum nf_nat_manip_type maniptype,
+ const union nf_conntrack_man_proto *min,
+ const union nf_conntrack_man_proto *max);
+
+ /* Alter the per-proto part of the tuple (depending on
+ * maniptype), to give a unique tuple in the given range if
+ * possible. Per-protocol part of tuple is initialized to the
+ * incoming packet.
+ */
+ void (*unique_tuple)(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
+ enum nf_nat_manip_type maniptype,
+ const struct nf_conn *ct);
+
+ int (*nlattr_to_range)(struct nlattr *tb[],
+ struct nf_nat_range *range);
+};
+
+/* Protocol registration. */
+extern int nf_nat_l4proto_register(u8 l3proto, const struct nf_nat_l4proto *l4proto);
+extern void nf_nat_l4proto_unregister(u8 l3proto, const struct nf_nat_l4proto *l4proto);
+
+extern const struct nf_nat_l4proto *__nf_nat_l4proto_find(u8 l3proto, u8 l4proto);
+
+/* Built-in protocols. */
+extern const struct nf_nat_l4proto nf_nat_l4proto_tcp;
+extern const struct nf_nat_l4proto nf_nat_l4proto_udp;
+extern const struct nf_nat_l4proto nf_nat_l4proto_icmp;
+extern const struct nf_nat_l4proto nf_nat_l4proto_unknown;
+
+extern bool nf_nat_l4proto_in_range(const struct nf_conntrack_tuple *tuple,
+ enum nf_nat_manip_type maniptype,
+ const union nf_conntrack_man_proto *min,
+ const union nf_conntrack_man_proto *max);
+
+extern void nf_nat_l4proto_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
+ enum nf_nat_manip_type maniptype,
+ const struct nf_conn *ct,
+ u16 *rover);
+
+extern int nf_nat_l4proto_nlattr_to_range(struct nlattr *tb[],
+ struct nf_nat_range *range);
+
+#endif /*_NF_NAT_L4PROTO_H*/
diff --git a/include/net/netfilter/nf_nat_protocol.h b/include/net/netfilter/nf_nat_protocol.h
deleted file mode 100644
index 7b0b511..0000000
--- a/include/net/netfilter/nf_nat_protocol.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/* Header for use in defining a given protocol. */
-#ifndef _NF_NAT_PROTOCOL_H
-#define _NF_NAT_PROTOCOL_H
-#include <net/netfilter/nf_nat.h>
-#include <linux/netfilter/nfnetlink_conntrack.h>
-
-struct nf_nat_ipv4_range;
-
-struct nf_nat_protocol {
- /* Protocol number. */
- unsigned int protonum;
-
- /* Translate a packet to the target according to manip type.
- Return true if succeeded. */
- bool (*manip_pkt)(struct sk_buff *skb,
- unsigned int iphdroff,
- const struct nf_conntrack_tuple *tuple,
- enum nf_nat_manip_type maniptype);
-
- /* Is the manipable part of the tuple between min and max incl? */
- bool (*in_range)(const struct nf_conntrack_tuple *tuple,
- enum nf_nat_manip_type maniptype,
- const union nf_conntrack_man_proto *min,
- const union nf_conntrack_man_proto *max);
-
- /* Alter the per-proto part of the tuple (depending on
- maniptype), to give a unique tuple in the given range if
- possible. Per-protocol part of tuple is initialized to the
- incoming packet. */
- void (*unique_tuple)(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
- enum nf_nat_manip_type maniptype,
- const struct nf_conn *ct);
-
- int (*nlattr_to_range)(struct nlattr *tb[],
- struct nf_nat_ipv4_range *range);
-};
-
-/* Protocol registration. */
-extern int nf_nat_protocol_register(const struct nf_nat_protocol *proto);
-extern void nf_nat_protocol_unregister(const struct nf_nat_protocol *proto);
-
-/* Built-in protocols. */
-extern const struct nf_nat_protocol nf_nat_protocol_tcp;
-extern const struct nf_nat_protocol nf_nat_protocol_udp;
-extern const struct nf_nat_protocol nf_nat_protocol_icmp;
-extern const struct nf_nat_protocol nf_nat_unknown_protocol;
-
-extern int init_protocols(void) __init;
-extern void cleanup_protocols(void);
-extern const struct nf_nat_protocol *find_nat_proto(u_int16_t protonum);
-
-extern bool nf_nat_proto_in_range(const struct nf_conntrack_tuple *tuple,
- enum nf_nat_manip_type maniptype,
- const union nf_conntrack_man_proto *min,
- const union nf_conntrack_man_proto *max);
-
-extern void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
- enum nf_nat_manip_type maniptype,
- const struct nf_conn *ct,
- u_int16_t *rover);
-
-extern int nf_nat_proto_nlattr_to_range(struct nlattr *tb[],
- struct nf_nat_ipv4_range *range);
-
-#endif /*_NF_NAT_PROTO_H*/
diff --git a/include/net/netfilter/nf_nat_rule.h b/include/net/netfilter/nf_nat_rule.h
deleted file mode 100644
index 2890bdc..0000000
--- a/include/net/netfilter/nf_nat_rule.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef _NF_NAT_RULE_H
-#define _NF_NAT_RULE_H
-#include <net/netfilter/nf_conntrack.h>
-#include <net/netfilter/nf_nat.h>
-#include <linux/netfilter_ipv4/ip_tables.h>
-
-extern int nf_nat_rule_init(void) __init;
-extern void nf_nat_rule_cleanup(void);
-extern int nf_nat_rule_find(struct sk_buff *skb,
- unsigned int hooknum,
- const struct net_device *in,
- const struct net_device *out,
- struct nf_conn *ct);
-
-#endif /* _NF_NAT_RULE_H */
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h
index 3aecdc7..a1d83cc 100644
--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -83,6 +83,10 @@ struct netns_ct {
int sysctl_auto_assign_helper;
bool auto_assign_helper_warned;
struct nf_ip_net nf_ct_proto;
+#ifdef CONFIG_NF_NAT_NEEDED
+ struct hlist_head *nat_bysource;
+ unsigned int nat_htable_size;
+#endif
#ifdef CONFIG_SYSCTL
struct ctl_table_header *sysctl_header;
struct ctl_table_header *acct_sysctl_header;
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 1474dd6..ace280d 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -51,8 +51,6 @@ struct netns_ipv4 {
struct xt_table *iptable_security;
#endif
struct xt_table *nat_table;
- struct hlist_head *nat_bysource;
- unsigned int nat_htable_size;
#endif
int sysctl_icmp_echo_ignore_all;
diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index ed1b367..f1643c0 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -72,43 +72,6 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned int addr_type)
}
EXPORT_SYMBOL(ip_route_me_harder);
-#ifdef CONFIG_XFRM
-int ip_xfrm_me_harder(struct sk_buff *skb)
-{
- struct flowi fl;
- unsigned int hh_len;
- struct dst_entry *dst;
-
- if (IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED)
- return 0;
- if (xfrm_decode_session(skb, &fl, AF_INET) < 0)
- return -1;
-
- dst = skb_dst(skb);
- if (dst->xfrm)
- dst = ((struct xfrm_dst *)dst)->route;
- dst_hold(dst);
-
- dst = xfrm_lookup(dev_net(dst->dev), dst, &fl, skb->sk, 0);
- if (IS_ERR(dst))
- return -1;
-
- skb_dst_drop(skb);
- skb_dst_set(skb, dst);
-
- /* Change in oif may mean change in hh_len. */
- hh_len = skb_dst(skb)->dev->hard_header_len;
- if (skb_headroom(skb) < hh_len &&
- pskb_expand_head(skb, hh_len - skb_headroom(skb), 0, GFP_ATOMIC))
- return -1;
- return 0;
-}
-EXPORT_SYMBOL(ip_xfrm_me_harder);
-#endif
-
-void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *);
-EXPORT_SYMBOL(ip_nat_decode_session);
-
/*
* Extra routing may needed on local out, as the QUEUE target never
* returns control to the table.
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index fcc543c..33372a1 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -143,25 +143,21 @@ config IP_NF_TARGET_ULOG
To compile it as a module, choose M here. If unsure, say N.
# NAT + specific targets: nf_conntrack
-config NF_NAT
- tristate "Full NAT"
+config NF_NAT_IPV4
+ tristate "IPv4 NAT"
depends on NF_CONNTRACK_IPV4
default m if NETFILTER_ADVANCED=n
+ select NF_NAT
help
- The Full NAT option allows masquerading, port forwarding and other
+ The IPv4 NAT option allows masquerading, port forwarding and other
forms of full Network Address Port Translation. It is controlled by
the `nat' table in iptables: see the man page for iptables(8).
To compile it as a module, choose M here. If unsure, say N.
-config NF_NAT_NEEDED
- bool
- depends on NF_NAT
- default y
-
config IP_NF_TARGET_MASQUERADE
tristate "MASQUERADE target support"
- depends on NF_NAT
+ depends on NF_NAT_IPV4
default m if NETFILTER_ADVANCED=n
help
Masquerading is a special case of NAT: all outgoing connections are
@@ -174,7 +170,7 @@ config IP_NF_TARGET_MASQUERADE
config IP_NF_TARGET_NETMAP
tristate "NETMAP target support"
- depends on NF_NAT
+ depends on NF_NAT_IPV4
depends on NETFILTER_ADVANCED
help
NETMAP is an implementation of static 1:1 NAT mapping of network
@@ -185,7 +181,7 @@ config IP_NF_TARGET_NETMAP
config IP_NF_TARGET_REDIRECT
tristate "REDIRECT target support"
- depends on NF_NAT
+ depends on NF_NAT_IPV4
depends on NETFILTER_ADVANCED
help
REDIRECT is a special case of NAT: all incoming connections are
@@ -197,7 +193,7 @@ config IP_NF_TARGET_REDIRECT
config NF_NAT_SNMP_BASIC
tristate "Basic SNMP-ALG support"
- depends on NF_CONNTRACK_SNMP && NF_NAT
+ depends on NF_CONNTRACK_SNMP && NF_NAT_IPV4
depends on NETFILTER_ADVANCED
default NF_NAT && NF_CONNTRACK_SNMP
---help---
@@ -219,61 +215,46 @@ config NF_NAT_SNMP_BASIC
# <expr> '&&' <expr> (6)
#
# (6) Returns the result of min(/expr/, /expr/).
-config NF_NAT_PROTO_DCCP
- tristate
- depends on NF_NAT && NF_CT_PROTO_DCCP
- default NF_NAT && NF_CT_PROTO_DCCP
config NF_NAT_PROTO_GRE
tristate
- depends on NF_NAT && NF_CT_PROTO_GRE
-
-config NF_NAT_PROTO_UDPLITE
- tristate
- depends on NF_NAT && NF_CT_PROTO_UDPLITE
- default NF_NAT && NF_CT_PROTO_UDPLITE
-
-config NF_NAT_PROTO_SCTP
- tristate
- default NF_NAT && NF_CT_PROTO_SCTP
- depends on NF_NAT && NF_CT_PROTO_SCTP
- select LIBCRC32C
+ depends on NF_NAT_IPV4 && NF_CT_PROTO_GRE
config NF_NAT_FTP
tristate
- depends on NF_CONNTRACK && NF_NAT
- default NF_NAT && NF_CONNTRACK_FTP
+ depends on NF_CONNTRACK && NF_NAT_IPV4
+ default NF_NAT_IPV4 && NF_CONNTRACK_FTP
config NF_NAT_IRC
tristate
- depends on NF_CONNTRACK && NF_NAT
- default NF_NAT && NF_CONNTRACK_IRC
+ depends on NF_CONNTRACK && NF_NAT_IPV4
+ default NF_NAT_IPV4 && NF_CONNTRACK_IRC
config NF_NAT_TFTP
tristate
- depends on NF_CONNTRACK && NF_NAT
- default NF_NAT && NF_CONNTRACK_TFTP
+ depends on NF_CONNTRACK && NF_NAT_IPV4
+ default NF_NAT_IPV4 && NF_CONNTRACK_TFTP
config NF_NAT_AMANDA
tristate
- depends on NF_CONNTRACK && NF_NAT
- default NF_NAT && NF_CONNTRACK_AMANDA
+ depends on NF_CONNTRACK && NF_NAT_IPV4
+ default NF_NAT_IPV4 && NF_CONNTRACK_AMANDA
config NF_NAT_PPTP
tristate
- depends on NF_CONNTRACK && NF_NAT
- default NF_NAT && NF_CONNTRACK_PPTP
+ depends on NF_CONNTRACK && NF_NAT_IPV4
+ default NF_NAT_IPV4 && NF_CONNTRACK_PPTP
select NF_NAT_PROTO_GRE
config NF_NAT_H323
tristate
- depends on NF_CONNTRACK && NF_NAT
- default NF_NAT && NF_CONNTRACK_H323
+ depends on NF_CONNTRACK && NF_NAT_IPV4
+ default NF_NAT_IPV4 && NF_CONNTRACK_H323
config NF_NAT_SIP
tristate
- depends on NF_CONNTRACK && NF_NAT
- default NF_NAT && NF_CONNTRACK_SIP
+ depends on NF_CONNTRACK && NF_NAT_IPV4
+ default NF_NAT_IPV4 && NF_CONNTRACK_SIP
# mangle + specific targets
config IP_NF_MANGLE
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index c20674d..0ea3acc 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -10,13 +10,11 @@ nf_conntrack_ipv4-objs += nf_conntrack_l3proto_ipv4_compat.o
endif
endif
-nf_nat-y := nf_nat_core.o nf_nat_helper.o nf_nat_proto_unknown.o nf_nat_proto_common.o nf_nat_proto_tcp.o nf_nat_proto_udp.o nf_nat_proto_icmp.o
-iptable_nat-y := nf_nat_rule.o nf_nat_standalone.o
-
# connection tracking
obj-$(CONFIG_NF_CONNTRACK_IPV4) += nf_conntrack_ipv4.o
-obj-$(CONFIG_NF_NAT) += nf_nat.o
+nf_nat_ipv4-y := nf_nat_l3proto_ipv4.o nf_nat_proto_icmp.o
+obj-$(CONFIG_NF_NAT_IPV4) += nf_nat_ipv4.o
# defrag
obj-$(CONFIG_NF_DEFRAG_IPV4) += nf_defrag_ipv4.o
@@ -32,10 +30,7 @@ obj-$(CONFIG_NF_NAT_SNMP_BASIC) += nf_nat_snmp_basic.o
obj-$(CONFIG_NF_NAT_TFTP) += nf_nat_tftp.o
# NAT protocols (nf_nat)
-obj-$(CONFIG_NF_NAT_PROTO_DCCP) += nf_nat_proto_dccp.o
obj-$(CONFIG_NF_NAT_PROTO_GRE) += nf_nat_proto_gre.o
-obj-$(CONFIG_NF_NAT_PROTO_UDPLITE) += nf_nat_proto_udplite.o
-obj-$(CONFIG_NF_NAT_PROTO_SCTP) += nf_nat_proto_sctp.o
# generic IP tables
obj-$(CONFIG_IP_NF_IPTABLES) += ip_tables.o
@@ -43,7 +38,7 @@ obj-$(CONFIG_IP_NF_IPTABLES) += ip_tables.o
# the three instances of ip_tables
obj-$(CONFIG_IP_NF_FILTER) += iptable_filter.o
obj-$(CONFIG_IP_NF_MANGLE) += iptable_mangle.o
-obj-$(CONFIG_NF_NAT) += iptable_nat.o
+obj-$(CONFIG_NF_NAT_IPV4) += iptable_nat.o
obj-$(CONFIG_IP_NF_RAW) += iptable_raw.o
obj-$(CONFIG_IP_NF_SECURITY) += iptable_security.o
diff --git a/net/ipv4/netfilter/ipt_MASQUERADE.c b/net/ipv4/netfilter/ipt_MASQUERADE.c
index cbb6a1a..1c3aa28 100644
--- a/net/ipv4/netfilter/ipt_MASQUERADE.c
+++ b/net/ipv4/netfilter/ipt_MASQUERADE.c
@@ -19,9 +19,9 @@
#include <net/ip.h>
#include <net/checksum.h>
#include <net/route.h>
-#include <net/netfilter/nf_nat_rule.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter/x_tables.h>
+#include <net/netfilter/nf_nat.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
@@ -49,7 +49,7 @@ masquerade_tg(struct sk_buff *skb, const struct xt_action_param *par)
struct nf_conn *ct;
struct nf_conn_nat *nat;
enum ip_conntrack_info ctinfo;
- struct nf_nat_ipv4_range newrange;
+ struct nf_nat_range newrange;
const struct nf_nat_ipv4_multi_range_compat *mr;
const struct rtable *rt;
__be32 newsrc, nh;
@@ -80,10 +80,13 @@ masquerade_tg(struct sk_buff *skb, const struct xt_action_param *par)
nat->masq_index = par->out->ifindex;
/* Transfer from original range. */
- newrange = ((struct nf_nat_ipv4_range)
- { mr->range[0].flags | NF_NAT_RANGE_MAP_IPS,
- newsrc, newsrc,
- mr->range[0].min, mr->range[0].max });
+ memset(&newrange.min_addr, 0, sizeof(newrange.min_addr));
+ memset(&newrange.max_addr, 0, sizeof(newrange.max_addr));
+ newrange.flags = mr->range[0].flags | NF_NAT_RANGE_MAP_IPS;
+ newrange.min_addr.ip = newsrc;
+ newrange.max_addr.ip = newsrc;
+ newrange.min_proto = mr->range[0].min;
+ newrange.max_proto = mr->range[0].max;
/* Hand modified range to generic setup. */
return nf_nat_setup_info(ct, &newrange, NF_NAT_MANIP_SRC);
diff --git a/net/ipv4/netfilter/ipt_NETMAP.c b/net/ipv4/netfilter/ipt_NETMAP.c
index b5bfbba..85028dc 100644
--- a/net/ipv4/netfilter/ipt_NETMAP.c
+++ b/net/ipv4/netfilter/ipt_NETMAP.c
@@ -16,7 +16,7 @@
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter/x_tables.h>
-#include <net/netfilter/nf_nat_rule.h>
+#include <net/netfilter/nf_nat.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Svenning Soerensen <svenning@post5.tele.dk>");
@@ -44,7 +44,7 @@ netmap_tg(struct sk_buff *skb, const struct xt_action_param *par)
enum ip_conntrack_info ctinfo;
__be32 new_ip, netmask;
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
- struct nf_nat_ipv4_range newrange;
+ struct nf_nat_range newrange;
NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING ||
par->hooknum == NF_INET_POST_ROUTING ||
@@ -61,10 +61,13 @@ netmap_tg(struct sk_buff *skb, const struct xt_action_param *par)
new_ip = ip_hdr(skb)->saddr & ~netmask;
new_ip |= mr->range[0].min_ip & netmask;
- newrange = ((struct nf_nat_ipv4_range)
- { mr->range[0].flags | NF_NAT_RANGE_MAP_IPS,
- new_ip, new_ip,
- mr->range[0].min, mr->range[0].max });
+ memset(&newrange.min_addr, 0, sizeof(newrange.min_addr));
+ memset(&newrange.max_addr, 0, sizeof(newrange.max_addr));
+ newrange.flags = mr->range[0].flags | NF_NAT_RANGE_MAP_IPS;
+ newrange.min_addr.ip = new_ip;
+ newrange.max_addr.ip = new_ip;
+ newrange.min_proto = mr->range[0].min;
+ newrange.max_proto = mr->range[0].max;
/* Hand modified range to generic setup. */
return nf_nat_setup_info(ct, &newrange, HOOK2MANIP(par->hooknum));
diff --git a/net/ipv4/netfilter/ipt_REDIRECT.c b/net/ipv4/netfilter/ipt_REDIRECT.c
index 7c0103a..11407d7 100644
--- a/net/ipv4/netfilter/ipt_REDIRECT.c
+++ b/net/ipv4/netfilter/ipt_REDIRECT.c
@@ -19,7 +19,7 @@
#include <net/checksum.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter/x_tables.h>
-#include <net/netfilter/nf_nat_rule.h>
+#include <net/netfilter/nf_nat.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
@@ -48,7 +48,7 @@ redirect_tg(struct sk_buff *skb, const struct xt_action_param *par)
enum ip_conntrack_info ctinfo;
__be32 newdst;
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
- struct nf_nat_ipv4_range newrange;
+ struct nf_nat_range newrange;
NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING ||
par->hooknum == NF_INET_LOCAL_OUT);
@@ -76,10 +76,13 @@ redirect_tg(struct sk_buff *skb, const struct xt_action_param *par)
}
/* Transfer from original range. */
- newrange = ((struct nf_nat_ipv4_range)
- { mr->range[0].flags | NF_NAT_RANGE_MAP_IPS,
- newdst, newdst,
- mr->range[0].min, mr->range[0].max });
+ memset(&newrange.min_addr, 0, sizeof(newrange.min_addr));
+ memset(&newrange.max_addr, 0, sizeof(newrange.max_addr));
+ newrange.flags = mr->range[0].flags | NF_NAT_RANGE_MAP_IPS;
+ newrange.min_addr.ip = newdst;
+ newrange.max_addr.ip = newdst;
+ newrange.min_proto = mr->range[0].min;
+ newrange.max_proto = mr->range[0].max;
/* Hand modified range to generic setup. */
return nf_nat_setup_info(ct, &newrange, NF_NAT_MANIP_DST);
diff --git a/net/ipv4/netfilter/nf_nat_standalone.c b/net/ipv4/netfilter/iptable_nat.c
similarity index 52%
rename from net/ipv4/netfilter/nf_nat_standalone.c
rename to net/ipv4/netfilter/iptable_nat.c
index 3828a42..9e0ffaf 100644
--- a/net/ipv4/netfilter/nf_nat_standalone.c
+++ b/net/ipv4/netfilter/iptable_nat.c
@@ -1,84 +1,71 @@
/* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
+ * (C) 2011 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-#include <linux/types.h>
-#include <linux/icmp.h>
-#include <linux/gfp.h>
-#include <linux/ip.h>
+
+#include <linux/module.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/proc_fs.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/ip.h>
#include <net/ip.h>
-#include <net/checksum.h>
-#include <linux/spinlock.h>
-#include <net/netfilter/nf_conntrack.h>
-#include <net/netfilter/nf_conntrack_core.h>
-#include <net/netfilter/nf_conntrack_extend.h>
#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_rule.h>
-#include <net/netfilter/nf_nat_protocol.h>
#include <net/netfilter/nf_nat_core.h>
-#include <net/netfilter/nf_nat_helper.h>
-#include <linux/netfilter_ipv4/ip_tables.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+
+static const struct xt_table nf_nat_ipv4_table = {
+ .name = "nat",
+ .valid_hooks = (1 << NF_INET_PRE_ROUTING) |
+ (1 << NF_INET_POST_ROUTING) |
+ (1 << NF_INET_LOCAL_OUT) |
+ (1 << NF_INET_LOCAL_IN),
+ .me = THIS_MODULE,
+ .af = NFPROTO_IPV4,
+};
-#ifdef CONFIG_XFRM
-static void nat_decode_session(struct sk_buff *skb, struct flowi *fl)
+static unsigned int alloc_null_binding(struct nf_conn *ct, unsigned int hooknum)
{
- struct flowi4 *fl4 = &fl->u.ip4;
- const struct nf_conn *ct;
- const struct nf_conntrack_tuple *t;
- enum ip_conntrack_info ctinfo;
- enum ip_conntrack_dir dir;
- unsigned long statusbit;
-
- ct = nf_ct_get(skb, &ctinfo);
- if (ct == NULL)
- return;
- dir = CTINFO2DIR(ctinfo);
- t = &ct->tuplehash[dir].tuple;
-
- if (dir == IP_CT_DIR_ORIGINAL)
- statusbit = IPS_DST_NAT;
- else
- statusbit = IPS_SRC_NAT;
-
- if (ct->status & statusbit) {
- fl4->daddr = t->dst.u3.ip;
- if (t->dst.protonum == IPPROTO_TCP ||
- t->dst.protonum == IPPROTO_UDP ||
- t->dst.protonum == IPPROTO_UDPLITE ||
- t->dst.protonum == IPPROTO_DCCP ||
- t->dst.protonum == IPPROTO_SCTP)
- fl4->fl4_dport = t->dst.u.tcp.port;
- }
+ /* Force range to this IP; let proto decide mapping for
+ * per-proto parts (hence not IP_NAT_RANGE_PROTO_SPECIFIED).
+ */
+ struct nf_nat_range range;
+
+ range.flags = 0;
+ pr_debug("Allocating NULL binding for %p (%pI4)\n", ct,
+ HOOK2MANIP(hooknum) == NF_NAT_MANIP_SRC ?
+ &ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip :
+ &ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip);
+
+ return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum));
+}
- statusbit ^= IPS_NAT_MASK;
+static unsigned int nf_nat_rule_find(struct sk_buff *skb, unsigned int hooknum,
+ const struct net_device *in,
+ const struct net_device *out,
+ struct nf_conn *ct)
+{
+ struct net *net = nf_ct_net(ct);
+ unsigned int ret;
- if (ct->status & statusbit) {
- fl4->saddr = t->src.u3.ip;
- if (t->dst.protonum == IPPROTO_TCP ||
- t->dst.protonum == IPPROTO_UDP ||
- t->dst.protonum == IPPROTO_UDPLITE ||
- t->dst.protonum == IPPROTO_DCCP ||
- t->dst.protonum == IPPROTO_SCTP)
- fl4->fl4_sport = t->src.u.tcp.port;
+ ret = ipt_do_table(skb, hooknum, in, out, net->ipv4.nat_table);
+ if (ret == NF_ACCEPT) {
+ if (!nf_nat_initialized(ct, HOOK2MANIP(hooknum)))
+ ret = alloc_null_binding(ct, hooknum);
}
+ return ret;
}
-#endif
static unsigned int
-nf_nat_fn(unsigned int hooknum,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+nf_nat_ipv4_fn(unsigned int hooknum,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
@@ -87,14 +74,16 @@ nf_nat_fn(unsigned int hooknum,
enum nf_nat_manip_type maniptype = HOOK2MANIP(hooknum);
/* We never see fragments: conntrack defrags on pre-routing
- and local-out, and nf_nat_out protects post-routing. */
+ * and local-out, and nf_nat_out protects post-routing.
+ */
NF_CT_ASSERT(!ip_is_fragment(ip_hdr(skb)));
ct = nf_ct_get(skb, &ctinfo);
/* Can't track? It's not due to stress, or conntrack would
- have dropped it. Hence it's the user's responsibilty to
- packet filter it out, or implement conntrack/NAT for that
- protocol. 8) --RR */
+ * have dropped it. Hence it's the user's responsibilty to
+ * packet filter it out, or implement conntrack/NAT for that
+ * protocol. 8) --RR
+ */
if (!ct)
return NF_ACCEPT;
@@ -118,17 +107,17 @@ nf_nat_fn(unsigned int hooknum,
case IP_CT_RELATED:
case IP_CT_RELATED_REPLY:
if (ip_hdr(skb)->protocol == IPPROTO_ICMP) {
- if (!nf_nat_icmp_reply_translation(ct, ctinfo,
- hooknum, skb))
+ if (!nf_nat_icmp_reply_translation(skb, ct, ctinfo,
+ hooknum))
return NF_DROP;
else
return NF_ACCEPT;
}
/* Fall thru... (Only ICMPs can be IP_CT_IS_REPLY) */
case IP_CT_NEW:
-
/* Seen it before? This can happen for loopback, retrans,
- or local packets.. */
+ * or local packets.
+ */
if (!nf_nat_initialized(ct, maniptype)) {
unsigned int ret;
@@ -151,16 +140,16 @@ nf_nat_fn(unsigned int hooknum,
}
static unsigned int
-nf_nat_in(unsigned int hooknum,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+nf_nat_ipv4_in(unsigned int hooknum,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
unsigned int ret;
__be32 daddr = ip_hdr(skb)->daddr;
- ret = nf_nat_fn(hooknum, skb, in, out, okfn);
+ ret = nf_nat_ipv4_fn(hooknum, skb, in, out, okfn);
if (ret != NF_DROP && ret != NF_STOLEN &&
daddr != ip_hdr(skb)->daddr)
skb_dst_drop(skb);
@@ -169,11 +158,11 @@ nf_nat_in(unsigned int hooknum,
}
static unsigned int
-nf_nat_out(unsigned int hooknum,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+nf_nat_ipv4_out(unsigned int hooknum,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
#ifdef CONFIG_XFRM
const struct nf_conn *ct;
@@ -186,29 +175,30 @@ nf_nat_out(unsigned int hooknum,
ip_hdrlen(skb) < sizeof(struct iphdr))
return NF_ACCEPT;
- ret = nf_nat_fn(hooknum, skb, in, out, okfn);
+ ret = nf_nat_ipv4_fn(hooknum, skb, in, out, okfn);
#ifdef CONFIG_XFRM
if (ret != NF_DROP && ret != NF_STOLEN &&
+ !(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&
(ct = nf_ct_get(skb, &ctinfo)) != NULL) {
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
if ((ct->tuplehash[dir].tuple.src.u3.ip !=
ct->tuplehash[!dir].tuple.dst.u3.ip) ||
(ct->tuplehash[dir].tuple.src.u.all !=
- ct->tuplehash[!dir].tuple.dst.u.all)
- )
- return ip_xfrm_me_harder(skb) == 0 ? ret : NF_DROP;
+ ct->tuplehash[!dir].tuple.dst.u.all))
+ if (nf_xfrm_me_harder(skb, AF_INET) < 0)
+ ret = NF_DROP;
}
#endif
return ret;
}
static unsigned int
-nf_nat_local_fn(unsigned int hooknum,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+nf_nat_ipv4_local_fn(unsigned int hooknum,
+ struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
const struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
@@ -219,7 +209,7 @@ nf_nat_local_fn(unsigned int hooknum,
ip_hdrlen(skb) < sizeof(struct iphdr))
return NF_ACCEPT;
- ret = nf_nat_fn(hooknum, skb, in, out, okfn);
+ ret = nf_nat_ipv4_fn(hooknum, skb, in, out, okfn);
if (ret != NF_DROP && ret != NF_STOLEN &&
(ct = nf_ct_get(skb, &ctinfo)) != NULL) {
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
@@ -230,21 +220,20 @@ nf_nat_local_fn(unsigned int hooknum,
ret = NF_DROP;
}
#ifdef CONFIG_XFRM
- else if (ct->tuplehash[dir].tuple.dst.u.all !=
+ else if (!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&
+ ct->tuplehash[dir].tuple.dst.u.all !=
ct->tuplehash[!dir].tuple.src.u.all)
- if (ip_xfrm_me_harder(skb))
+ if (nf_xfrm_me_harder(skb, AF_INET) < 0)
ret = NF_DROP;
#endif
}
return ret;
}
-/* We must be after connection tracking and before packet filtering. */
-
-static struct nf_hook_ops nf_nat_ops[] __read_mostly = {
+static struct nf_hook_ops nf_nat_ipv4_ops[] __read_mostly = {
/* Before packet filtering, change destination */
{
- .hook = nf_nat_in,
+ .hook = nf_nat_ipv4_in,
.owner = THIS_MODULE,
.pf = NFPROTO_IPV4,
.hooknum = NF_INET_PRE_ROUTING,
@@ -252,7 +241,7 @@ static struct nf_hook_ops nf_nat_ops[] __read_mostly = {
},
/* After packet filtering, change source */
{
- .hook = nf_nat_out,
+ .hook = nf_nat_ipv4_out,
.owner = THIS_MODULE,
.pf = NFPROTO_IPV4,
.hooknum = NF_INET_POST_ROUTING,
@@ -260,7 +249,7 @@ static struct nf_hook_ops nf_nat_ops[] __read_mostly = {
},
/* Before packet filtering, change destination */
{
- .hook = nf_nat_local_fn,
+ .hook = nf_nat_ipv4_local_fn,
.owner = THIS_MODULE,
.pf = NFPROTO_IPV4,
.hooknum = NF_INET_LOCAL_OUT,
@@ -268,7 +257,7 @@ static struct nf_hook_ops nf_nat_ops[] __read_mostly = {
},
/* After packet filtering, change source */
{
- .hook = nf_nat_fn,
+ .hook = nf_nat_ipv4_fn,
.owner = THIS_MODULE,
.pf = NFPROTO_IPV4,
.hooknum = NF_INET_LOCAL_IN,
@@ -276,51 +265,56 @@ static struct nf_hook_ops nf_nat_ops[] __read_mostly = {
},
};
-static int __init nf_nat_standalone_init(void)
+static int __net_init iptable_nat_net_init(struct net *net)
{
- int ret = 0;
+ struct ipt_replace *repl;
+
+ repl = ipt_alloc_initial_table(&nf_nat_ipv4_table);
+ if (repl == NULL)
+ return -ENOMEM;
+ net->ipv4.nat_table = ipt_register_table(net, &nf_nat_ipv4_table, repl);
+ kfree(repl);
+ if (IS_ERR(net->ipv4.nat_table))
+ return PTR_ERR(net->ipv4.nat_table);
+ return 0;
+}
- need_ipv4_conntrack();
+static void __net_exit iptable_nat_net_exit(struct net *net)
+{
+ ipt_unregister_table(net, net->ipv4.nat_table);
+}
-#ifdef CONFIG_XFRM
- BUG_ON(ip_nat_decode_session != NULL);
- RCU_INIT_POINTER(ip_nat_decode_session, nat_decode_session);
-#endif
- ret = nf_nat_rule_init();
- if (ret < 0) {
- pr_err("nf_nat_init: can't setup rules.\n");
- goto cleanup_decode_session;
- }
- ret = nf_register_hooks(nf_nat_ops, ARRAY_SIZE(nf_nat_ops));
- if (ret < 0) {
- pr_err("nf_nat_init: can't register hooks.\n");
- goto cleanup_rule_init;
- }
- return ret;
+static struct pernet_operations iptable_nat_net_ops = {
+ .init = iptable_nat_net_init,
+ .exit = iptable_nat_net_exit,
+};
- cleanup_rule_init:
- nf_nat_rule_cleanup();
- cleanup_decode_session:
-#ifdef CONFIG_XFRM
- RCU_INIT_POINTER(ip_nat_decode_session, NULL);
- synchronize_net();
-#endif
- return ret;
+static int __init iptable_nat_init(void)
+{
+ int err;
+
+ err = register_pernet_subsys(&iptable_nat_net_ops);
+ if (err < 0)
+ goto err1;
+
+ err = nf_register_hooks(nf_nat_ipv4_ops, ARRAY_SIZE(nf_nat_ipv4_ops));
+ if (err < 0)
+ goto err2;
+ return 0;
+
+err2:
+ unregister_pernet_subsys(&iptable_nat_net_ops);
+err1:
+ return err;
}
-static void __exit nf_nat_standalone_fini(void)
+static void __exit iptable_nat_exit(void)
{
- nf_unregister_hooks(nf_nat_ops, ARRAY_SIZE(nf_nat_ops));
- nf_nat_rule_cleanup();
-#ifdef CONFIG_XFRM
- RCU_INIT_POINTER(ip_nat_decode_session, NULL);
- synchronize_net();
-#endif
- /* Conntrack caches are unregistered in nf_conntrack_cleanup */
+ nf_unregister_hooks(nf_nat_ipv4_ops, ARRAY_SIZE(nf_nat_ipv4_ops));
+ unregister_pernet_subsys(&iptable_nat_net_ops);
}
-module_init(nf_nat_standalone_init);
-module_exit(nf_nat_standalone_fini);
+module_init(iptable_nat_init);
+module_exit(iptable_nat_exit);
MODULE_LICENSE("GPL");
-MODULE_ALIAS("ip_nat");
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
index 4ada329..fcdd0c2 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -29,12 +29,6 @@
#include <net/netfilter/ipv4/nf_defrag_ipv4.h>
#include <net/netfilter/nf_log.h>
-int (*nf_nat_seq_adjust_hook)(struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff);
-EXPORT_SYMBOL_GPL(nf_nat_seq_adjust_hook);
-
static bool ipv4_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
struct nf_conntrack_tuple *tuple)
{
diff --git a/net/ipv4/netfilter/nf_nat_amanda.c b/net/ipv4/netfilter/nf_nat_amanda.c
index 75464b6..42d3378 100644
--- a/net/ipv4/netfilter/nf_nat_amanda.c
+++ b/net/ipv4/netfilter/nf_nat_amanda.c
@@ -16,7 +16,6 @@
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_nat_helper.h>
-#include <net/netfilter/nf_nat_rule.h>
#include <linux/netfilter/nf_conntrack_amanda.h>
MODULE_AUTHOR("Brian J. Murrell <netfilter@interlinx.bc.ca>");
diff --git a/net/ipv4/netfilter/nf_nat_ftp.c b/net/ipv4/netfilter/nf_nat_ftp.c
index 5589f3a..dd5e387 100644
--- a/net/ipv4/netfilter/nf_nat_ftp.c
+++ b/net/ipv4/netfilter/nf_nat_ftp.c
@@ -15,7 +15,6 @@
#include <linux/netfilter_ipv4.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_helper.h>
-#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_ftp.h>
diff --git a/net/ipv4/netfilter/nf_nat_h323.c b/net/ipv4/netfilter/nf_nat_h323.c
index d2c228d..9c3db10 100644
--- a/net/ipv4/netfilter/nf_nat_h323.c
+++ b/net/ipv4/netfilter/nf_nat_h323.c
@@ -15,7 +15,6 @@
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_helper.h>
-#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_h323.h>
@@ -392,7 +391,7 @@ static int nat_h245(struct sk_buff *skb, struct nf_conn *ct,
static void ip_nat_q931_expect(struct nf_conn *new,
struct nf_conntrack_expect *this)
{
- struct nf_nat_ipv4_range range;
+ struct nf_nat_range range;
if (this->tuple.src.u3.ip != 0) { /* Only accept calls from GK */
nf_nat_follow_master(new, this);
@@ -404,14 +403,15 @@ static void ip_nat_q931_expect(struct nf_conn *new,
/* Change src to where master sends to */
range.flags = NF_NAT_RANGE_MAP_IPS;
- range.min_ip = range.max_ip = new->tuplehash[!this->dir].tuple.src.u3.ip;
+ range.min_addr = range.max_addr =
+ new->tuplehash[!this->dir].tuple.src.u3;
nf_nat_setup_info(new, &range, NF_NAT_MANIP_SRC);
/* For DST manip, map port here to where it's expected. */
range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
- range.min = range.max = this->saved_proto;
- range.min_ip = range.max_ip =
- new->master->tuplehash[!this->dir].tuple.src.u3.ip;
+ range.min_proto = range.max_proto = this->saved_proto;
+ range.min_addr = range.max_addr =
+ new->master->tuplehash[!this->dir].tuple.src.u3;
nf_nat_setup_info(new, &range, NF_NAT_MANIP_DST);
}
@@ -490,20 +490,21 @@ static int nat_q931(struct sk_buff *skb, struct nf_conn *ct,
static void ip_nat_callforwarding_expect(struct nf_conn *new,
struct nf_conntrack_expect *this)
{
- struct nf_nat_ipv4_range range;
+ struct nf_nat_range range;
/* This must be a fresh one. */
BUG_ON(new->status & IPS_NAT_DONE_MASK);
/* Change src to where master sends to */
range.flags = NF_NAT_RANGE_MAP_IPS;
- range.min_ip = range.max_ip = new->tuplehash[!this->dir].tuple.src.u3.ip;
+ range.min_addr = range.max_addr =
+ new->tuplehash[!this->dir].tuple.src.u3;
nf_nat_setup_info(new, &range, NF_NAT_MANIP_SRC);
/* For DST manip, map port here to where it's expected. */
range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
- range.min = range.max = this->saved_proto;
- range.min_ip = range.max_ip = this->saved_ip;
+ range.min_proto = range.max_proto = this->saved_proto;
+ range.min_addr = range.max_addr = this->saved_addr;
nf_nat_setup_info(new, &range, NF_NAT_MANIP_DST);
}
@@ -519,7 +520,7 @@ static int nat_callforwarding(struct sk_buff *skb, struct nf_conn *ct,
u_int16_t nated_port;
/* Set expectations for NAT */
- exp->saved_ip = exp->tuple.dst.u3.ip;
+ exp->saved_addr = exp->tuple.dst.u3;
exp->tuple.dst.u3.ip = ct->tuplehash[!dir].tuple.dst.u3.ip;
exp->saved_proto.tcp.port = exp->tuple.dst.u.tcp.port;
exp->expectfn = ip_nat_callforwarding_expect;
diff --git a/net/ipv4/netfilter/nf_nat_irc.c b/net/ipv4/netfilter/nf_nat_irc.c
index 5b0c20a..1ce37f8 100644
--- a/net/ipv4/netfilter/nf_nat_irc.c
+++ b/net/ipv4/netfilter/nf_nat_irc.c
@@ -17,7 +17,6 @@
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_helper.h>
-#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_irc.h>
diff --git a/net/ipv4/netfilter/nf_nat_l3proto_ipv4.c b/net/ipv4/netfilter/nf_nat_l3proto_ipv4.c
new file mode 100644
index 0000000..ede45fb
--- /dev/null
+++ b/net/ipv4/netfilter/nf_nat_l3proto_ipv4.c
@@ -0,0 +1,281 @@
+/*
+ * (C) 1999-2001 Paul `Rusty' Russell
+ * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
+ * (C) 2011 Patrick McHardy <kaber@trash.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/icmp.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4.h>
+#include <net/secure_seq.h>
+#include <net/checksum.h>
+#include <net/route.h>
+#include <net/ip.h>
+
+#include <net/netfilter/nf_conntrack_core.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_nat_core.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/netfilter/nf_nat_l4proto.h>
+
+static const struct nf_nat_l3proto nf_nat_l3proto_ipv4;
+
+#ifdef CONFIG_XFRM
+static void nf_nat_ipv4_decode_session(struct sk_buff *skb,
+ const struct nf_conn *ct,
+ enum ip_conntrack_dir dir,
+ unsigned long statusbit,
+ struct flowi *fl)
+{
+ const struct nf_conntrack_tuple *t = &ct->tuplehash[dir].tuple;
+ struct flowi4 *fl4 = &fl->u.ip4;
+
+ if (ct->status & statusbit) {
+ fl4->daddr = t->dst.u3.ip;
+ if (t->dst.protonum == IPPROTO_TCP ||
+ t->dst.protonum == IPPROTO_UDP ||
+ t->dst.protonum == IPPROTO_UDPLITE ||
+ t->dst.protonum == IPPROTO_DCCP ||
+ t->dst.protonum == IPPROTO_SCTP)
+ fl4->fl4_dport = t->dst.u.all;
+ }
+
+ statusbit ^= IPS_NAT_MASK;
+
+ if (ct->status & statusbit) {
+ fl4->saddr = t->src.u3.ip;
+ if (t->dst.protonum == IPPROTO_TCP ||
+ t->dst.protonum == IPPROTO_UDP ||
+ t->dst.protonum == IPPROTO_UDPLITE ||
+ t->dst.protonum == IPPROTO_DCCP ||
+ t->dst.protonum == IPPROTO_SCTP)
+ fl4->fl4_sport = t->src.u.all;
+ }
+}
+#endif /* CONFIG_XFRM */
+
+static int nf_nat_ipv4_in_range(const struct nf_conntrack_tuple *t,
+ const struct nf_nat_range *range)
+{
+ return ntohl(t->src.u3.ip) >= ntohl(range->min_addr.ip) &&
+ ntohl(t->src.u3.ip) <= ntohl(range->max_addr.ip);
+}
+
+static u32 nf_nat_ipv4_secure_port(const struct nf_conntrack_tuple *t,
+ __be16 dport)
+{
+ return secure_ipv4_port_ephemeral(t->src.u3.ip, t->dst.u3.ip, dport);
+}
+
+static bool nf_nat_ipv4_manip_pkt(struct sk_buff *skb,
+ unsigned int iphdroff,
+ const struct nf_nat_l4proto *l4proto,
+ const struct nf_conntrack_tuple *target,
+ enum nf_nat_manip_type maniptype)
+{
+ struct iphdr *iph;
+ unsigned int hdroff;
+
+ if (!skb_make_writable(skb, iphdroff + sizeof(*iph)))
+ return false;
+
+ iph = (void *)skb->data + iphdroff;
+ hdroff = iphdroff + iph->ihl * 4;
+
+ if (!l4proto->manip_pkt(skb, &nf_nat_l3proto_ipv4, iphdroff, hdroff,
+ target, maniptype))
+ return false;
+ iph = (void *)skb->data + iphdroff;
+
+ if (maniptype == NF_NAT_MANIP_SRC) {
+ csum_replace4(&iph->check, iph->saddr, target->src.u3.ip);
+ iph->saddr = target->src.u3.ip;
+ } else {
+ csum_replace4(&iph->check, iph->daddr, target->dst.u3.ip);
+ iph->daddr = target->dst.u3.ip;
+ }
+ return true;
+}
+
+static void nf_nat_ipv4_csum_update(struct sk_buff *skb,
+ unsigned int iphdroff, __sum16 *check,
+ const struct nf_conntrack_tuple *t,
+ enum nf_nat_manip_type maniptype)
+{
+ struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
+ __be32 oldip, newip;
+
+ if (maniptype == NF_NAT_MANIP_SRC) {
+ oldip = iph->saddr;
+ newip = t->src.u3.ip;
+ } else {
+ oldip = iph->daddr;
+ newip = t->dst.u3.ip;
+ }
+ inet_proto_csum_replace4(check, skb, oldip, newip, 1);
+}
+
+static void nf_nat_ipv4_csum_recalc(struct sk_buff *skb,
+ u8 proto, void *data, __sum16 *check,
+ int datalen, int oldlen)
+{
+ const struct iphdr *iph = ip_hdr(skb);
+ struct rtable *rt = skb_rtable(skb);
+
+ if (skb->ip_summed != CHECKSUM_PARTIAL) {
+ if (!(rt->rt_flags & RTCF_LOCAL) &&
+ (!skb->dev || skb->dev->features & NETIF_F_V4_CSUM)) {
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->csum_start = skb_headroom(skb) +
+ skb_network_offset(skb) +
+ ip_hdrlen(skb);
+ skb->csum_offset = (void *)check - data;
+ *check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
+ datalen, proto, 0);
+ } else {
+ *check = 0;
+ *check = csum_tcpudp_magic(iph->saddr, iph->daddr,
+ datalen, proto,
+ csum_partial(data, datalen,
+ 0));
+ if (proto == IPPROTO_UDP && !*check)
+ *check = CSUM_MANGLED_0;
+ }
+ } else
+ inet_proto_csum_replace2(check, skb,
+ htons(oldlen), htons(datalen), 1);
+}
+
+static int nf_nat_ipv4_nlattr_to_range(struct nlattr *tb[],
+ struct nf_nat_range *range)
+{
+ if (tb[CTA_NAT_V4_MINIP]) {
+ range->min_addr.ip = nla_get_be32(tb[CTA_NAT_V4_MINIP]);
+ range->flags |= NF_NAT_RANGE_MAP_IPS;
+ }
+
+ if (tb[CTA_NAT_V4_MAXIP])
+ range->max_addr.ip = nla_get_be32(tb[CTA_NAT_V4_MAXIP]);
+ else
+ range->max_addr.ip = range->min_addr.ip;
+
+ return 0;
+}
+
+static const struct nf_nat_l3proto nf_nat_l3proto_ipv4 = {
+ .l3proto = NFPROTO_IPV4,
+ .in_range = nf_nat_ipv4_in_range,
+ .secure_port = nf_nat_ipv4_secure_port,
+ .manip_pkt = nf_nat_ipv4_manip_pkt,
+ .csum_update = nf_nat_ipv4_csum_update,
+ .csum_recalc = nf_nat_ipv4_csum_recalc,
+ .nlattr_to_range = nf_nat_ipv4_nlattr_to_range,
+#ifdef CONFIG_XFRM
+ .decode_session = nf_nat_ipv4_decode_session,
+#endif
+};
+
+int nf_nat_icmp_reply_translation(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int hooknum)
+{
+ struct {
+ struct icmphdr icmp;
+ struct iphdr ip;
+ } *inside;
+ enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
+ enum nf_nat_manip_type manip = HOOK2MANIP(hooknum);
+ unsigned int hdrlen = ip_hdrlen(skb);
+ const struct nf_nat_l4proto *l4proto;
+ struct nf_conntrack_tuple target;
+ unsigned long statusbit;
+
+ NF_CT_ASSERT(ctinfo == IP_CT_RELATED || ctinfo == IP_CT_RELATED_REPLY);
+
+ if (!skb_make_writable(skb, hdrlen + sizeof(*inside)))
+ return 0;
+ if (nf_ip_checksum(skb, hooknum, hdrlen, 0))
+ return 0;
+
+ inside = (void *)skb->data + hdrlen;
+ if (inside->icmp.type == ICMP_REDIRECT) {
+ if ((ct->status & IPS_NAT_DONE_MASK) != IPS_NAT_DONE_MASK)
+ return 0;
+ if (ct->status & IPS_NAT_MASK)
+ return 0;
+ }
+
+ if (manip == NF_NAT_MANIP_SRC)
+ statusbit = IPS_SRC_NAT;
+ else
+ statusbit = IPS_DST_NAT;
+
+ /* Invert if this is reply direction */
+ if (dir == IP_CT_DIR_REPLY)
+ statusbit ^= IPS_NAT_MASK;
+
+ if (!(ct->status & statusbit))
+ return 1;
+
+ l4proto = __nf_nat_l4proto_find(NFPROTO_IPV4, inside->ip.protocol);
+ if (!nf_nat_ipv4_manip_pkt(skb, hdrlen + sizeof(inside->icmp),
+ l4proto, &ct->tuplehash[!dir].tuple, !manip))
+ return 0;
+
+ if (skb->ip_summed != CHECKSUM_PARTIAL) {
+ /* Reloading "inside" here since manip_pkt may reallocate */
+ inside = (void *)skb->data + hdrlen;
+ inside->icmp.checksum = 0;
+ inside->icmp.checksum =
+ csum_fold(skb_checksum(skb, hdrlen,
+ skb->len - hdrlen, 0));
+ }
+
+ /* Change outer to look like the reply to an incoming packet */
+ nf_ct_invert_tuplepr(&target, &ct->tuplehash[!dir].tuple);
+ l4proto = __nf_nat_l4proto_find(NFPROTO_IPV4, 0);
+ if (!nf_nat_ipv4_manip_pkt(skb, 0, l4proto, &target, manip))
+ return 0;
+
+ return 1;
+}
+EXPORT_SYMBOL_GPL(nf_nat_icmp_reply_translation);
+
+static int __init nf_nat_l3proto_ipv4_init(void)
+{
+ int err;
+
+ err = nf_nat_l4proto_register(NFPROTO_IPV4, &nf_nat_l4proto_icmp);
+ if (err < 0)
+ goto err1;
+ err = nf_nat_l3proto_register(&nf_nat_l3proto_ipv4);
+ if (err < 0)
+ goto err2;
+ return err;
+
+err2:
+ nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_icmp);
+err1:
+ return err;
+}
+
+static void __exit nf_nat_l3proto_ipv4_exit(void)
+{
+ nf_nat_l3proto_unregister(&nf_nat_l3proto_ipv4);
+ nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_icmp);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("nf-nat-" __stringify(AF_INET));
+
+module_init(nf_nat_l3proto_ipv4_init);
+module_exit(nf_nat_l3proto_ipv4_exit);
diff --git a/net/ipv4/netfilter/nf_nat_pptp.c b/net/ipv4/netfilter/nf_nat_pptp.c
index 31ef890..a06d7d7 100644
--- a/net/ipv4/netfilter/nf_nat_pptp.c
+++ b/net/ipv4/netfilter/nf_nat_pptp.c
@@ -22,7 +22,6 @@
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_helper.h>
-#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_zones.h>
@@ -47,7 +46,7 @@ static void pptp_nat_expected(struct nf_conn *ct,
struct nf_conntrack_tuple t;
const struct nf_ct_pptp_master *ct_pptp_info;
const struct nf_nat_pptp *nat_pptp_info;
- struct nf_nat_ipv4_range range;
+ struct nf_nat_range range;
ct_pptp_info = nfct_help_data(master);
nat_pptp_info = &nfct_nat(master)->help.nat_pptp_info;
@@ -89,21 +88,21 @@ static void pptp_nat_expected(struct nf_conn *ct,
/* Change src to where master sends to */
range.flags = NF_NAT_RANGE_MAP_IPS;
- range.min_ip = range.max_ip
- = ct->master->tuplehash[!exp->dir].tuple.dst.u3.ip;
+ range.min_addr = range.max_addr
+ = ct->master->tuplehash[!exp->dir].tuple.dst.u3;
if (exp->dir == IP_CT_DIR_ORIGINAL) {
range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
- range.min = range.max = exp->saved_proto;
+ range.min_proto = range.max_proto = exp->saved_proto;
}
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
/* For DST manip, map port here to where it's expected. */
range.flags = NF_NAT_RANGE_MAP_IPS;
- range.min_ip = range.max_ip
- = ct->master->tuplehash[!exp->dir].tuple.src.u3.ip;
+ range.min_addr = range.max_addr
+ = ct->master->tuplehash[!exp->dir].tuple.src.u3;
if (exp->dir == IP_CT_DIR_REPLY) {
range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
- range.min = range.max = exp->saved_proto;
+ range.min_proto = range.max_proto = exp->saved_proto;
}
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
}
diff --git a/net/ipv4/netfilter/nf_nat_proto_gre.c b/net/ipv4/netfilter/nf_nat_proto_gre.c
index 46ba0b9..ea44f02 100644
--- a/net/ipv4/netfilter/nf_nat_proto_gre.c
+++ b/net/ipv4/netfilter/nf_nat_proto_gre.c
@@ -28,8 +28,7 @@
#include <linux/ip.h>
#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_rule.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l4proto.h>
#include <linux/netfilter/nf_conntrack_proto_gre.h>
MODULE_LICENSE("GPL");
@@ -38,8 +37,9 @@ MODULE_DESCRIPTION("Netfilter NAT protocol helper module for GRE");
/* generate unique tuple ... */
static void
-gre_unique_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
+gre_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
@@ -62,8 +62,8 @@ gre_unique_tuple(struct nf_conntrack_tuple *tuple,
min = 1;
range_size = 0xffff;
} else {
- min = ntohs(range->min.gre.key);
- range_size = ntohs(range->max.gre.key) - min + 1;
+ min = ntohs(range->min_proto.gre.key);
+ range_size = ntohs(range->max_proto.gre.key) - min + 1;
}
pr_debug("min = %u, range_size = %u\n", min, range_size);
@@ -80,14 +80,14 @@ gre_unique_tuple(struct nf_conntrack_tuple *tuple,
/* manipulate a GRE packet according to maniptype */
static bool
-gre_manip_pkt(struct sk_buff *skb, unsigned int iphdroff,
+gre_manip_pkt(struct sk_buff *skb,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype)
{
const struct gre_hdr *greh;
struct gre_hdr_pptp *pgreh;
- const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
- unsigned int hdroff = iphdroff + iph->ihl * 4;
/* pgreh includes two optional 32bit fields which are not required
* to be there. That's where the magic '8' comes from */
@@ -117,24 +117,24 @@ gre_manip_pkt(struct sk_buff *skb, unsigned int iphdroff,
return true;
}
-static const struct nf_nat_protocol gre = {
- .protonum = IPPROTO_GRE,
+static const struct nf_nat_l4proto gre = {
+ .l4proto = IPPROTO_GRE,
.manip_pkt = gre_manip_pkt,
- .in_range = nf_nat_proto_in_range,
+ .in_range = nf_nat_l4proto_in_range,
.unique_tuple = gre_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
- .nlattr_to_range = nf_nat_proto_nlattr_to_range,
+ .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif
};
static int __init nf_nat_proto_gre_init(void)
{
- return nf_nat_protocol_register(&gre);
+ return nf_nat_l4proto_register(NFPROTO_IPV4, &gre);
}
static void __exit nf_nat_proto_gre_fini(void)
{
- nf_nat_protocol_unregister(&gre);
+ nf_nat_l4proto_unregister(NFPROTO_IPV4, &gre);
}
module_init(nf_nat_proto_gre_init);
diff --git a/net/ipv4/netfilter/nf_nat_proto_icmp.c b/net/ipv4/netfilter/nf_nat_proto_icmp.c
index b351728..eb30347 100644
--- a/net/ipv4/netfilter/nf_nat_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_nat_proto_icmp.c
@@ -15,8 +15,7 @@
#include <linux/netfilter.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h>
-#include <net/netfilter/nf_nat_rule.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l4proto.h>
static bool
icmp_in_range(const struct nf_conntrack_tuple *tuple,
@@ -29,8 +28,9 @@ icmp_in_range(const struct nf_conntrack_tuple *tuple,
}
static void
-icmp_unique_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
+icmp_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
@@ -38,13 +38,14 @@ icmp_unique_tuple(struct nf_conntrack_tuple *tuple,
unsigned int range_size;
unsigned int i;
- range_size = ntohs(range->max.icmp.id) - ntohs(range->min.icmp.id) + 1;
+ range_size = ntohs(range->max_proto.icmp.id) -
+ ntohs(range->min_proto.icmp.id) + 1;
/* If no range specified... */
if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED))
range_size = 0xFFFF;
for (i = 0; ; ++id) {
- tuple->src.u.icmp.id = htons(ntohs(range->min.icmp.id) +
+ tuple->src.u.icmp.id = htons(ntohs(range->min_proto.icmp.id) +
(id % range_size));
if (++i == range_size || !nf_nat_used_tuple(tuple, ct))
return;
@@ -54,13 +55,12 @@ icmp_unique_tuple(struct nf_conntrack_tuple *tuple,
static bool
icmp_manip_pkt(struct sk_buff *skb,
- unsigned int iphdroff,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype)
{
- const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
struct icmphdr *hdr;
- unsigned int hdroff = iphdroff + iph->ihl*4;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false;
@@ -72,12 +72,12 @@ icmp_manip_pkt(struct sk_buff *skb,
return true;
}
-const struct nf_nat_protocol nf_nat_protocol_icmp = {
- .protonum = IPPROTO_ICMP,
+const struct nf_nat_l4proto nf_nat_l4proto_icmp = {
+ .l4proto = IPPROTO_ICMP,
.manip_pkt = icmp_manip_pkt,
.in_range = icmp_in_range,
.unique_tuple = icmp_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
- .nlattr_to_range = nf_nat_proto_nlattr_to_range,
+ .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif
};
diff --git a/net/ipv4/netfilter/nf_nat_rule.c b/net/ipv4/netfilter/nf_nat_rule.c
deleted file mode 100644
index d2a9dc3..0000000
--- a/net/ipv4/netfilter/nf_nat_rule.c
+++ /dev/null
@@ -1,214 +0,0 @@
-/* (C) 1999-2001 Paul `Rusty' Russell
- * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/* Everything about the rules for NAT. */
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#include <linux/types.h>
-#include <linux/ip.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-#include <linux/module.h>
-#include <linux/kmod.h>
-#include <linux/skbuff.h>
-#include <linux/proc_fs.h>
-#include <linux/slab.h>
-#include <net/checksum.h>
-#include <net/route.h>
-#include <linux/bitops.h>
-
-#include <linux/netfilter_ipv4/ip_tables.h>
-#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_core.h>
-#include <net/netfilter/nf_nat_rule.h>
-
-#define NAT_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | \
- (1 << NF_INET_POST_ROUTING) | \
- (1 << NF_INET_LOCAL_OUT) | \
- (1 << NF_INET_LOCAL_IN))
-
-static const struct xt_table nat_table = {
- .name = "nat",
- .valid_hooks = NAT_VALID_HOOKS,
- .me = THIS_MODULE,
- .af = NFPROTO_IPV4,
-};
-
-/* Source NAT */
-static unsigned int
-ipt_snat_target(struct sk_buff *skb, const struct xt_action_param *par)
-{
- struct nf_conn *ct;
- enum ip_conntrack_info ctinfo;
- const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
-
- NF_CT_ASSERT(par->hooknum == NF_INET_POST_ROUTING ||
- par->hooknum == NF_INET_LOCAL_IN);
-
- ct = nf_ct_get(skb, &ctinfo);
-
- /* Connection must be valid and new. */
- NF_CT_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
- ctinfo == IP_CT_RELATED_REPLY));
- NF_CT_ASSERT(par->out != NULL);
-
- return nf_nat_setup_info(ct, &mr->range[0], NF_NAT_MANIP_SRC);
-}
-
-static unsigned int
-ipt_dnat_target(struct sk_buff *skb, const struct xt_action_param *par)
-{
- struct nf_conn *ct;
- enum ip_conntrack_info ctinfo;
- const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
-
- NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING ||
- par->hooknum == NF_INET_LOCAL_OUT);
-
- ct = nf_ct_get(skb, &ctinfo);
-
- /* Connection must be valid and new. */
- NF_CT_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
-
- return nf_nat_setup_info(ct, &mr->range[0], NF_NAT_MANIP_DST);
-}
-
-static int ipt_snat_checkentry(const struct xt_tgchk_param *par)
-{
- const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
-
- /* Must be a valid range */
- if (mr->rangesize != 1) {
- pr_info("SNAT: multiple ranges no longer supported\n");
- return -EINVAL;
- }
- return 0;
-}
-
-static int ipt_dnat_checkentry(const struct xt_tgchk_param *par)
-{
- const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
-
- /* Must be a valid range */
- if (mr->rangesize != 1) {
- pr_info("DNAT: multiple ranges no longer supported\n");
- return -EINVAL;
- }
- return 0;
-}
-
-static unsigned int
-alloc_null_binding(struct nf_conn *ct, unsigned int hooknum)
-{
- /* Force range to this IP; let proto decide mapping for
- per-proto parts (hence not NF_NAT_RANGE_PROTO_SPECIFIED).
- */
- struct nf_nat_ipv4_range range;
-
- range.flags = 0;
- pr_debug("Allocating NULL binding for %p (%pI4)\n", ct,
- HOOK2MANIP(hooknum) == NF_NAT_MANIP_SRC ?
- &ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip :
- &ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip);
-
- return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum));
-}
-
-int nf_nat_rule_find(struct sk_buff *skb,
- unsigned int hooknum,
- const struct net_device *in,
- const struct net_device *out,
- struct nf_conn *ct)
-{
- struct net *net = nf_ct_net(ct);
- int ret;
-
- ret = ipt_do_table(skb, hooknum, in, out, net->ipv4.nat_table);
-
- if (ret == NF_ACCEPT) {
- if (!nf_nat_initialized(ct, HOOK2MANIP(hooknum)))
- /* NUL mapping */
- ret = alloc_null_binding(ct, hooknum);
- }
- return ret;
-}
-
-static struct xt_target ipt_snat_reg __read_mostly = {
- .name = "SNAT",
- .target = ipt_snat_target,
- .targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
- .table = "nat",
- .hooks = (1 << NF_INET_POST_ROUTING) | (1 << NF_INET_LOCAL_IN),
- .checkentry = ipt_snat_checkentry,
- .family = AF_INET,
-};
-
-static struct xt_target ipt_dnat_reg __read_mostly = {
- .name = "DNAT",
- .target = ipt_dnat_target,
- .targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
- .table = "nat",
- .hooks = (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT),
- .checkentry = ipt_dnat_checkentry,
- .family = AF_INET,
-};
-
-static int __net_init nf_nat_rule_net_init(struct net *net)
-{
- struct ipt_replace *repl;
-
- repl = ipt_alloc_initial_table(&nat_table);
- if (repl == NULL)
- return -ENOMEM;
- net->ipv4.nat_table = ipt_register_table(net, &nat_table, repl);
- kfree(repl);
- if (IS_ERR(net->ipv4.nat_table))
- return PTR_ERR(net->ipv4.nat_table);
- return 0;
-}
-
-static void __net_exit nf_nat_rule_net_exit(struct net *net)
-{
- ipt_unregister_table(net, net->ipv4.nat_table);
-}
-
-static struct pernet_operations nf_nat_rule_net_ops = {
- .init = nf_nat_rule_net_init,
- .exit = nf_nat_rule_net_exit,
-};
-
-int __init nf_nat_rule_init(void)
-{
- int ret;
-
- ret = register_pernet_subsys(&nf_nat_rule_net_ops);
- if (ret != 0)
- goto out;
- ret = xt_register_target(&ipt_snat_reg);
- if (ret != 0)
- goto unregister_table;
-
- ret = xt_register_target(&ipt_dnat_reg);
- if (ret != 0)
- goto unregister_snat;
-
- return ret;
-
- unregister_snat:
- xt_unregister_target(&ipt_snat_reg);
- unregister_table:
- unregister_pernet_subsys(&nf_nat_rule_net_ops);
- out:
- return ret;
-}
-
-void nf_nat_rule_cleanup(void)
-{
- xt_unregister_target(&ipt_dnat_reg);
- xt_unregister_target(&ipt_snat_reg);
- unregister_pernet_subsys(&nf_nat_rule_net_ops);
-}
diff --git a/net/ipv4/netfilter/nf_nat_sip.c b/net/ipv4/netfilter/nf_nat_sip.c
index df626af..47a4718 100644
--- a/net/ipv4/netfilter/nf_nat_sip.c
+++ b/net/ipv4/netfilter/nf_nat_sip.c
@@ -19,7 +19,6 @@
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_helper.h>
-#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_sip.h>
@@ -255,15 +254,15 @@ static void ip_nat_sip_seq_adjust(struct sk_buff *skb, s16 off)
static void ip_nat_sip_expected(struct nf_conn *ct,
struct nf_conntrack_expect *exp)
{
- struct nf_nat_ipv4_range range;
+ struct nf_nat_range range;
/* This must be a fresh one. */
BUG_ON(ct->status & IPS_NAT_DONE_MASK);
/* For DST manip, map port here to where it's expected. */
range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
- range.min = range.max = exp->saved_proto;
- range.min_ip = range.max_ip = exp->saved_ip;
+ range.min_proto = range.max_proto = exp->saved_proto;
+ range.min_addr = range.max_addr = exp->saved_addr;
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
/* Change src to where master sends to, but only if the connection
@@ -271,8 +270,8 @@ static void ip_nat_sip_expected(struct nf_conn *ct,
if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip ==
ct->master->tuplehash[exp->dir].tuple.src.u3.ip) {
range.flags = NF_NAT_RANGE_MAP_IPS;
- range.min_ip = range.max_ip
- = ct->master->tuplehash[!exp->dir].tuple.dst.u3.ip;
+ range.min_addr = range.max_addr
+ = ct->master->tuplehash[!exp->dir].tuple.dst.u3;
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
}
}
@@ -307,7 +306,7 @@ static unsigned int ip_nat_sip_expect(struct sk_buff *skb, unsigned int protoff,
else
port = ntohs(exp->tuple.dst.u.udp.port);
- exp->saved_ip = exp->tuple.dst.u3.ip;
+ exp->saved_addr = exp->tuple.dst.u3;
exp->tuple.dst.u3.ip = newip;
exp->saved_proto.udp.port = exp->tuple.dst.u.udp.port;
exp->dir = !dir;
@@ -329,7 +328,7 @@ static unsigned int ip_nat_sip_expect(struct sk_buff *skb, unsigned int protoff,
if (port == 0)
return NF_DROP;
- if (exp->tuple.dst.u3.ip != exp->saved_ip ||
+ if (exp->tuple.dst.u3.ip != exp->saved_addr.ip ||
exp->tuple.dst.u.udp.port != exp->saved_proto.udp.port) {
buflen = sprintf(buffer, "%pI4:%u", &newip, port);
if (!mangle_packet(skb, protoff, dataoff, dptr, datalen,
@@ -485,13 +484,13 @@ static unsigned int ip_nat_sdp_media(struct sk_buff *skb, unsigned int protoff,
else
rtp_addr->ip = ct->tuplehash[!dir].tuple.dst.u3.ip;
- rtp_exp->saved_ip = rtp_exp->tuple.dst.u3.ip;
+ rtp_exp->saved_addr = rtp_exp->tuple.dst.u3;
rtp_exp->tuple.dst.u3.ip = rtp_addr->ip;
rtp_exp->saved_proto.udp.port = rtp_exp->tuple.dst.u.udp.port;
rtp_exp->dir = !dir;
rtp_exp->expectfn = ip_nat_sip_expected;
- rtcp_exp->saved_ip = rtcp_exp->tuple.dst.u3.ip;
+ rtcp_exp->saved_addr = rtcp_exp->tuple.dst.u3;
rtcp_exp->tuple.dst.u3.ip = rtp_addr->ip;
rtcp_exp->saved_proto.udp.port = rtcp_exp->tuple.dst.u.udp.port;
rtcp_exp->dir = !dir;
diff --git a/net/ipv4/netfilter/nf_nat_tftp.c b/net/ipv4/netfilter/nf_nat_tftp.c
index 9dbb8d2..ccabbda 100644
--- a/net/ipv4/netfilter/nf_nat_tftp.c
+++ b/net/ipv4/netfilter/nf_nat_tftp.c
@@ -11,7 +11,6 @@
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_nat_helper.h>
-#include <net/netfilter/nf_nat_rule.h>
#include <linux/netfilter/nf_conntrack_tftp.h>
MODULE_AUTHOR("Magnus Boden <mb@ozaba.mine.nu>");
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index c19b214..91addda 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -356,6 +356,30 @@ config NETFILTER_NETLINK_QUEUE_CT
If this option is enabled, NFQUEUE can include Connection Tracking
information together with the packet is the enqueued via NFNETLINK.
+config NF_NAT
+ tristate
+
+config NF_NAT_NEEDED
+ bool
+ depends on NF_NAT
+ default y
+
+config NF_NAT_PROTO_DCCP
+ tristate
+ depends on NF_NAT && NF_CT_PROTO_DCCP
+ default NF_NAT && NF_CT_PROTO_DCCP
+
+config NF_NAT_PROTO_UDPLITE
+ tristate
+ depends on NF_NAT && NF_CT_PROTO_UDPLITE
+ default NF_NAT && NF_CT_PROTO_UDPLITE
+
+config NF_NAT_PROTO_SCTP
+ tristate
+ default NF_NAT && NF_CT_PROTO_SCTP
+ depends on NF_NAT && NF_CT_PROTO_SCTP
+ select LIBCRC32C
+
endif # NF_CONNTRACK
# transparent proxy support
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 1c5160f..09c9451 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -43,6 +43,17 @@ obj-$(CONFIG_NF_CONNTRACK_SANE) += nf_conntrack_sane.o
obj-$(CONFIG_NF_CONNTRACK_SIP) += nf_conntrack_sip.o
obj-$(CONFIG_NF_CONNTRACK_TFTP) += nf_conntrack_tftp.o
+nf_nat-y := nf_nat_core.o nf_nat_proto_unknown.o nf_nat_proto_common.o \
+ nf_nat_proto_udp.o nf_nat_proto_tcp.o nf_nat_helper.o
+
+obj-$(CONFIG_NF_NAT) += nf_nat.o
+obj-$(CONFIG_NF_NAT) += xt_nat.o
+
+# NAT protocols (nf_nat)
+obj-$(CONFIG_NF_NAT_PROTO_DCCP) += nf_nat_proto_dccp.o
+obj-$(CONFIG_NF_NAT_PROTO_UDPLITE) += nf_nat_proto_udplite.o
+obj-$(CONFIG_NF_NAT_PROTO_SCTP) += nf_nat_proto_sctp.o
+
# transparent proxy support
obj-$(CONFIG_NETFILTER_TPROXY) += nf_tproxy_core.o
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 0bc6b60..4ff0a60 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -273,6 +273,11 @@ EXPORT_SYMBOL_GPL(nfq_ct_nat_hook);
#endif /* CONFIG_NF_CONNTRACK */
+#ifdef CONFIG_NF_NAT_NEEDED
+void (*nf_nat_decode_session_hook)(struct sk_buff *, struct flowi *);
+EXPORT_SYMBOL(nf_nat_decode_session_hook);
+#endif
+
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *proc_net_netfilter;
EXPORT_SYMBOL(proc_net_netfilter);
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index cf48755..f83e79d 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -55,6 +55,12 @@ int (*nfnetlink_parse_nat_setup_hook)(struct nf_conn *ct,
const struct nlattr *attr) __read_mostly;
EXPORT_SYMBOL_GPL(nfnetlink_parse_nat_setup_hook);
+int (*nf_nat_seq_adjust_hook)(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff);
+EXPORT_SYMBOL_GPL(nf_nat_seq_adjust_hook);
+
DEFINE_SPINLOCK(nf_conntrack_lock);
EXPORT_SYMBOL_GPL(nf_conntrack_lock);
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 14f67a2..7545506 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -45,7 +45,7 @@
#include <net/netfilter/nf_conntrack_timestamp.h>
#ifdef CONFIG_NF_NAT_NEEDED
#include <net/netfilter/nf_nat_core.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l4proto.h>
#include <net/netfilter/nf_nat_helper.h>
#endif
@@ -1096,13 +1096,14 @@ ctnetlink_parse_nat_setup(struct nf_conn *ct,
const struct nlattr *attr)
{
typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
+ int err;
parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
if (!parse_nat_setup) {
#ifdef CONFIG_MODULES
rcu_read_unlock();
nfnl_unlock();
- if (request_module("nf-nat-ipv4") < 0) {
+ if (request_module("nf-nat") < 0) {
nfnl_lock();
rcu_read_lock();
return -EOPNOTSUPP;
@@ -1115,7 +1116,26 @@ ctnetlink_parse_nat_setup(struct nf_conn *ct,
return -EOPNOTSUPP;
}
- return parse_nat_setup(ct, manip, attr);
+ err = parse_nat_setup(ct, manip, attr);
+ if (err == -EAGAIN) {
+#ifdef CONFIG_MODULES
+ rcu_read_unlock();
+ spin_unlock_bh(&nf_conntrack_lock);
+ nfnl_unlock();
+ if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
+ nfnl_lock();
+ spin_lock_bh(&nf_conntrack_lock);
+ rcu_read_lock();
+ return -EOPNOTSUPP;
+ }
+ nfnl_lock();
+ spin_lock_bh(&nf_conntrack_lock);
+ rcu_read_lock();
+#else
+ err = -EOPNOTSUPP;
+#endif
+ }
+ return err;
}
#endif
@@ -1974,6 +1994,8 @@ nla_put_failure:
return -1;
}
+static const union nf_inet_addr any_addr;
+
static int
ctnetlink_exp_dump_expect(struct sk_buff *skb,
const struct nf_conntrack_expect *exp)
@@ -2000,7 +2022,8 @@ ctnetlink_exp_dump_expect(struct sk_buff *skb,
goto nla_put_failure;
#ifdef CONFIG_NF_NAT_NEEDED
- if (exp->saved_ip || exp->saved_proto.all) {
+ if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
+ exp->saved_proto.all) {
nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
if (!nest_parms)
goto nla_put_failure;
@@ -2009,7 +2032,7 @@ ctnetlink_exp_dump_expect(struct sk_buff *skb,
goto nla_put_failure;
nat_tuple.src.l3num = nf_ct_l3num(master);
- nat_tuple.src.u3.ip = exp->saved_ip;
+ nat_tuple.src.u3 = exp->saved_addr;
nat_tuple.dst.protonum = nf_ct_protonum(master);
nat_tuple.src.u = exp->saved_proto;
@@ -2405,7 +2428,7 @@ ctnetlink_parse_expect_nat(const struct nlattr *attr,
if (err < 0)
return err;
- exp->saved_ip = nat_tuple.src.u3.ip;
+ exp->saved_addr = nat_tuple.src.u3;
exp->saved_proto = nat_tuple.src.u;
exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index a5ac11e..9c2cc71 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -505,10 +505,10 @@ static inline s16 nat_offset(const struct nf_conn *ct,
return get_offset != NULL ? get_offset(ct, dir, seq) : 0;
}
-#define NAT_OFFSET(pf, ct, dir, seq) \
- (pf == NFPROTO_IPV4 ? nat_offset(ct, dir, seq) : 0)
+#define NAT_OFFSET(ct, dir, seq) \
+ (nat_offset(ct, dir, seq))
#else
-#define NAT_OFFSET(pf, ct, dir, seq) 0
+#define NAT_OFFSET(ct, dir, seq) 0
#endif
static bool tcp_in_window(const struct nf_conn *ct,
@@ -541,7 +541,7 @@ static bool tcp_in_window(const struct nf_conn *ct,
tcp_sack(skb, dataoff, tcph, &sack);
/* Take into account NAT sequence number mangling */
- receiver_offset = NAT_OFFSET(pf, ct, !dir, ack - 1);
+ receiver_offset = NAT_OFFSET(ct, !dir, ack - 1);
ack -= receiver_offset;
sack -= receiver_offset;
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 590f0ab..d517490 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -946,11 +946,11 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int protoff,
break;
#ifdef CONFIG_NF_NAT_NEEDED
if (exp->tuple.src.l3num == AF_INET && !direct_rtp &&
- (exp->saved_ip != exp->tuple.dst.u3.ip ||
+ (exp->saved_addr.ip != exp->tuple.dst.u3.ip ||
exp->saved_proto.udp.port != exp->tuple.dst.u.udp.port) &&
ct->status & IPS_NAT_MASK) {
- daddr->ip = exp->saved_ip;
- tuple.dst.u3.ip = exp->saved_ip;
+ daddr->ip = exp->saved_addr.ip;
+ tuple.dst.u3.ip = exp->saved_addr.ip;
tuple.dst.u.udp.port = exp->saved_proto.udp.port;
direct_rtp = 1;
} else
diff --git a/net/ipv4/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
similarity index 51%
rename from net/ipv4/netfilter/nf_nat_core.c
rename to net/netfilter/nf_nat_core.c
index 44b082f..7d5531e 100644
--- a/net/ipv4/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -1,7 +1,7 @@
-/* NAT for netfilter; shared with compatibility layer. */
-
-/* (C) 1999-2001 Paul `Rusty' Russell
+/*
+ * (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
+ * (C) 2011 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -13,39 +13,106 @@
#include <linux/timer.h>
#include <linux/skbuff.h>
#include <linux/gfp.h>
-#include <net/checksum.h>
-#include <net/icmp.h>
-#include <net/ip.h>
-#include <net/tcp.h> /* For tcp_prot in getorigdst */
-#include <linux/icmp.h>
-#include <linux/udp.h>
+#include <net/xfrm.h>
#include <linux/jhash.h>
+#include <linux/rtnetlink.h>
-#include <linux/netfilter_ipv4.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/netfilter/nf_nat_l4proto.h>
#include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_zones.h>
+#include <linux/netfilter/nf_nat.h>
static DEFINE_SPINLOCK(nf_nat_lock);
-static struct nf_conntrack_l3proto *l3proto __read_mostly;
-
-#define MAX_IP_NAT_PROTO 256
-static const struct nf_nat_protocol __rcu *nf_nat_protos[MAX_IP_NAT_PROTO]
+static DEFINE_MUTEX(nf_nat_proto_mutex);
+static const struct nf_nat_l3proto __rcu *nf_nat_l3protos[NFPROTO_NUMPROTO]
+ __read_mostly;
+static const struct nf_nat_l4proto __rcu **nf_nat_l4protos[NFPROTO_NUMPROTO]
__read_mostly;
-static inline const struct nf_nat_protocol *
-__nf_nat_proto_find(u_int8_t protonum)
+
+inline const struct nf_nat_l3proto *
+__nf_nat_l3proto_find(u8 family)
{
- return rcu_dereference(nf_nat_protos[protonum]);
+ return rcu_dereference(nf_nat_l3protos[family]);
}
+inline const struct nf_nat_l4proto *
+__nf_nat_l4proto_find(u8 family, u8 protonum)
+{
+ return rcu_dereference(nf_nat_l4protos[family][protonum]);
+}
+EXPORT_SYMBOL_GPL(__nf_nat_l4proto_find);
+
+#ifdef CONFIG_XFRM
+static void __nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl)
+{
+ const struct nf_nat_l3proto *l3proto;
+ const struct nf_conn *ct;
+ enum ip_conntrack_info ctinfo;
+ enum ip_conntrack_dir dir;
+ unsigned long statusbit;
+ u8 family;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ if (ct == NULL)
+ return;
+
+ family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
+ rcu_read_lock();
+ l3proto = __nf_nat_l3proto_find(family);
+ if (l3proto == NULL)
+ goto out;
+
+ dir = CTINFO2DIR(ctinfo);
+ if (dir == IP_CT_DIR_ORIGINAL)
+ statusbit = IPS_DST_NAT;
+ else
+ statusbit = IPS_SRC_NAT;
+
+ l3proto->decode_session(skb, ct, dir, statusbit, fl);
+out:
+ rcu_read_unlock();
+}
+
+int nf_xfrm_me_harder(struct sk_buff *skb, unsigned int family)
+{
+ struct flowi fl;
+ unsigned int hh_len;
+ struct dst_entry *dst;
+
+ if (xfrm_decode_session(skb, &fl, family) < 0)
+ return -1;
+
+ dst = skb_dst(skb);
+ if (dst->xfrm)
+ dst = ((struct xfrm_dst *)dst)->route;
+ dst_hold(dst);
+
+ dst = xfrm_lookup(dev_net(dst->dev), dst, &fl, skb->sk, 0);
+ if (IS_ERR(dst))
+ return -1;
+
+ skb_dst_drop(skb);
+ skb_dst_set(skb, dst);
+
+ /* Change in oif may mean change in hh_len. */
+ hh_len = skb_dst(skb)->dev->hard_header_len;
+ if (skb_headroom(skb) < hh_len &&
+ pskb_expand_head(skb, hh_len - skb_headroom(skb), 0, GFP_ATOMIC))
+ return -1;
+ return 0;
+}
+EXPORT_SYMBOL(nf_xfrm_me_harder);
+#endif /* CONFIG_XFRM */
+
/* We keep an extra hash for each conntrack, for fast searching. */
static inline unsigned int
hash_by_src(const struct net *net, u16 zone,
@@ -54,10 +121,9 @@ hash_by_src(const struct net *net, u16 zone,
unsigned int hash;
/* Original src, to ensure we map it consistently if poss. */
- hash = jhash_3words((__force u32)tuple->src.u3.ip,
- (__force u32)tuple->src.u.all ^ zone,
- tuple->dst.protonum, nf_conntrack_hash_rnd);
- return ((u64)hash * net->ipv4.nat_htable_size) >> 32;
+ hash = jhash2((u32 *)&tuple->src, sizeof(tuple->src) / sizeof(u32),
+ tuple->dst.protonum ^ zone ^ nf_conntrack_hash_rnd);
+ return ((u64)hash * net->ct.nat_htable_size) >> 32;
}
/* Is this tuple already taken? (not by us) */
@@ -66,10 +132,11 @@ nf_nat_used_tuple(const struct nf_conntrack_tuple *tuple,
const struct nf_conn *ignored_conntrack)
{
/* Conntrack tracking doesn't keep track of outgoing tuples; only
- incoming ones. NAT means they don't have a fixed mapping,
- so we invert the tuple and look for the incoming reply.
-
- We could keep a separate hash if this proves too slow. */
+ * incoming ones. NAT means they don't have a fixed mapping,
+ * so we invert the tuple and look for the incoming reply.
+ *
+ * We could keep a separate hash if this proves too slow.
+ */
struct nf_conntrack_tuple reply;
nf_ct_invert_tuplepr(&reply, tuple);
@@ -78,31 +145,26 @@ nf_nat_used_tuple(const struct nf_conntrack_tuple *tuple,
EXPORT_SYMBOL(nf_nat_used_tuple);
/* If we source map this tuple so reply looks like reply_tuple, will
- * that meet the constraints of range. */
-static int
-in_range(const struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range)
+ * that meet the constraints of range.
+ */
+static int in_range(const struct nf_nat_l3proto *l3proto,
+ const struct nf_nat_l4proto *l4proto,
+ const struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range)
{
- const struct nf_nat_protocol *proto;
- int ret = 0;
-
/* If we are supposed to map IPs, then we must be in the
- range specified, otherwise let this drag us onto a new src IP. */
- if (range->flags & NF_NAT_RANGE_MAP_IPS) {
- if (ntohl(tuple->src.u3.ip) < ntohl(range->min_ip) ||
- ntohl(tuple->src.u3.ip) > ntohl(range->max_ip))
- return 0;
- }
+ * range specified, otherwise let this drag us onto a new src IP.
+ */
+ if (range->flags & NF_NAT_RANGE_MAP_IPS &&
+ !l3proto->in_range(tuple, range))
+ return 0;
- rcu_read_lock();
- proto = __nf_nat_proto_find(tuple->dst.protonum);
if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) ||
- proto->in_range(tuple, NF_NAT_MANIP_SRC,
- &range->min, &range->max))
- ret = 1;
- rcu_read_unlock();
+ l4proto->in_range(tuple, NF_NAT_MANIP_SRC,
+ &range->min_proto, &range->max_proto))
+ return 1;
- return ret;
+ return 0;
}
static inline int
@@ -113,24 +175,25 @@ same_src(const struct nf_conn *ct,
t = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
return (t->dst.protonum == tuple->dst.protonum &&
- t->src.u3.ip == tuple->src.u3.ip &&
+ nf_inet_addr_cmp(&t->src.u3, &tuple->src.u3) &&
t->src.u.all == tuple->src.u.all);
}
/* Only called for SRC manip */
static int
find_appropriate_src(struct net *net, u16 zone,
+ const struct nf_nat_l3proto *l3proto,
+ const struct nf_nat_l4proto *l4proto,
const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_tuple *result,
- const struct nf_nat_ipv4_range *range)
+ const struct nf_nat_range *range)
{
unsigned int h = hash_by_src(net, zone, tuple);
const struct nf_conn_nat *nat;
const struct nf_conn *ct;
const struct hlist_node *n;
- rcu_read_lock();
- hlist_for_each_entry_rcu(nat, n, &net->ipv4.nat_bysource[h], bysource) {
+ hlist_for_each_entry_rcu(nat, n, &net->ct.nat_bysource[h], bysource) {
ct = nat->ct;
if (same_src(ct, tuple) && nf_ct_zone(ct) == zone) {
/* Copy source part from reply tuple. */
@@ -138,119 +201,150 @@ find_appropriate_src(struct net *net, u16 zone,
&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
result->dst = tuple->dst;
- if (in_range(result, range)) {
+ if (in_range(l3proto, l4proto, result, range)) {
rcu_read_unlock();
return 1;
}
}
}
- rcu_read_unlock();
return 0;
}
/* For [FUTURE] fragmentation handling, we want the least-used
- src-ip/dst-ip/proto triple. Fairness doesn't come into it. Thus
- if the range specifies 1.2.3.4 ports 10000-10005 and 1.2.3.5 ports
- 1-65535, we don't do pro-rata allocation based on ports; we choose
- the ip with the lowest src-ip/dst-ip/proto usage.
-*/
+ * src-ip/dst-ip/proto triple. Fairness doesn't come into it. Thus
+ * if the range specifies 1.2.3.4 ports 10000-10005 and 1.2.3.5 ports
+ * 1-65535, we don't do pro-rata allocation based on ports; we choose
+ * the ip with the lowest src-ip/dst-ip/proto usage.
+ */
static void
find_best_ips_proto(u16 zone, struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
+ const struct nf_nat_range *range,
const struct nf_conn *ct,
enum nf_nat_manip_type maniptype)
{
- __be32 *var_ipp;
+ union nf_inet_addr *var_ipp;
+ unsigned int i, max;
/* Host order */
- u_int32_t minip, maxip, j;
+ u32 minip, maxip, j, dist;
+ bool full_range;
/* No IP mapping? Do nothing. */
if (!(range->flags & NF_NAT_RANGE_MAP_IPS))
return;
if (maniptype == NF_NAT_MANIP_SRC)
- var_ipp = &tuple->src.u3.ip;
+ var_ipp = &tuple->src.u3;
else
- var_ipp = &tuple->dst.u3.ip;
+ var_ipp = &tuple->dst.u3;
/* Fast path: only one choice. */
- if (range->min_ip == range->max_ip) {
- *var_ipp = range->min_ip;
+ if (nf_inet_addr_cmp(&range->min_addr, &range->max_addr)) {
+ *var_ipp = range->min_addr;
return;
}
+ if (nf_ct_l3num(ct) == NFPROTO_IPV4)
+ max = sizeof(var_ipp->ip) / sizeof(u32) - 1;
+ else
+ max = sizeof(var_ipp->ip6) / sizeof(u32) - 1;
+
/* Hashing source and destination IPs gives a fairly even
* spread in practice (if there are a small number of IPs
* involved, there usually aren't that many connections
* anyway). The consistency means that servers see the same
* client coming from the same IP (some Internet Banking sites
- * like this), even across reboots. */
- minip = ntohl(range->min_ip);
- maxip = ntohl(range->max_ip);
- j = jhash_2words((__force u32)tuple->src.u3.ip,
- range->flags & NF_NAT_RANGE_PERSISTENT ?
- 0 : (__force u32)tuple->dst.u3.ip ^ zone, 0);
- j = ((u64)j * (maxip - minip + 1)) >> 32;
- *var_ipp = htonl(minip + j);
+ * like this), even across reboots.
+ */
+ j = jhash2((u32 *)&tuple->src.u3, sizeof(tuple->src.u3),
+ range->flags & NF_NAT_RANGE_PERSISTENT ?
+ 0 : (__force u32)tuple->dst.u3.all[max] ^ zone);
+
+ full_range = false;
+ for (i = 0; i <= max; i++) {
+ /* If first bytes of the address are at the maximum, use the
+ * distance. Otherwise use the full range.
+ */
+ if (!full_range) {
+ minip = ntohl((__force __be32)range->min_addr.all[i]);
+ maxip = ntohl((__force __be32)range->max_addr.all[i]);
+ dist = maxip - minip + 1;
+ } else {
+ minip = 0;
+ dist = ~0;
+ }
+
+ var_ipp->all[i] = (__force __u32)
+ htonl(minip + (((u64)j * dist) >> 32));
+ if (var_ipp->all[i] != range->max_addr.all[i])
+ full_range = true;
+
+ if (!(range->flags & NF_NAT_RANGE_PERSISTENT))
+ j ^= (__force u32)tuple->dst.u3.all[i];
+ }
}
-/* Manipulate the tuple into the range given. For NF_INET_POST_ROUTING,
- * we change the source to map into the range. For NF_INET_PRE_ROUTING
+/* Manipulate the tuple into the range given. For NF_INET_POST_ROUTING,
+ * we change the source to map into the range. For NF_INET_PRE_ROUTING
* and NF_INET_LOCAL_OUT, we change the destination to map into the
- * range. It might not be possible to get a unique tuple, but we try.
+ * range. It might not be possible to get a unique tuple, but we try.
* At worst (or if we race), we will end up with a final duplicate in
* __ip_conntrack_confirm and drop the packet. */
static void
get_unique_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig_tuple,
- const struct nf_nat_ipv4_range *range,
+ const struct nf_nat_range *range,
struct nf_conn *ct,
enum nf_nat_manip_type maniptype)
{
+ const struct nf_nat_l3proto *l3proto;
+ const struct nf_nat_l4proto *l4proto;
struct net *net = nf_ct_net(ct);
- const struct nf_nat_protocol *proto;
u16 zone = nf_ct_zone(ct);
- /* 1) If this srcip/proto/src-proto-part is currently mapped,
- and that same mapping gives a unique tuple within the given
- range, use that.
+ rcu_read_lock();
+ l3proto = __nf_nat_l3proto_find(orig_tuple->src.l3num);
+ l4proto = __nf_nat_l4proto_find(orig_tuple->src.l3num,
+ orig_tuple->dst.protonum);
- This is only required for source (ie. NAT/masq) mappings.
- So far, we don't do local source mappings, so multiple
- manips not an issue. */
+ /* 1) If this srcip/proto/src-proto-part is currently mapped,
+ * and that same mapping gives a unique tuple within the given
+ * range, use that.
+ *
+ * This is only required for source (ie. NAT/masq) mappings.
+ * So far, we don't do local source mappings, so multiple
+ * manips not an issue.
+ */
if (maniptype == NF_NAT_MANIP_SRC &&
!(range->flags & NF_NAT_RANGE_PROTO_RANDOM)) {
/* try the original tuple first */
- if (in_range(orig_tuple, range)) {
+ if (in_range(l3proto, l4proto, orig_tuple, range)) {
if (!nf_nat_used_tuple(orig_tuple, ct)) {
*tuple = *orig_tuple;
- return;
+ goto out;
}
- } else if (find_appropriate_src(net, zone, orig_tuple, tuple,
- range)) {
+ } else if (find_appropriate_src(net, zone, l3proto, l4proto,
+ orig_tuple, tuple, range)) {
pr_debug("get_unique_tuple: Found current src map\n");
if (!nf_nat_used_tuple(tuple, ct))
- return;
+ goto out;
}
}
- /* 2) Select the least-used IP/proto combination in the given
- range. */
+ /* 2) Select the least-used IP/proto combination in the given range */
*tuple = *orig_tuple;
find_best_ips_proto(zone, tuple, range, ct, maniptype);
/* 3) The per-protocol part of the manip is made to map into
- the range to make a unique tuple. */
-
- rcu_read_lock();
- proto = __nf_nat_proto_find(orig_tuple->dst.protonum);
+ * the range to make a unique tuple.
+ */
/* Only bother mapping if it's not already in range and unique */
if (!(range->flags & NF_NAT_RANGE_PROTO_RANDOM)) {
if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) {
- if (proto->in_range(tuple, maniptype, &range->min,
- &range->max) &&
- (range->min.all == range->max.all ||
+ if (l4proto->in_range(tuple, maniptype,
+ &range->min_proto,
+ &range->max_proto) &&
+ (range->min_proto.all == range->max_proto.all ||
!nf_nat_used_tuple(tuple, ct)))
goto out;
} else if (!nf_nat_used_tuple(tuple, ct)) {
@@ -259,14 +353,14 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
}
/* Last change: get protocol to try to obtain unique tuple. */
- proto->unique_tuple(tuple, range, maniptype, ct);
+ l4proto->unique_tuple(l3proto, tuple, range, maniptype, ct);
out:
rcu_read_unlock();
}
unsigned int
nf_nat_setup_info(struct nf_conn *ct,
- const struct nf_nat_ipv4_range *range,
+ const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype)
{
struct net *net = nf_ct_net(ct);
@@ -288,10 +382,10 @@ nf_nat_setup_info(struct nf_conn *ct,
BUG_ON(nf_nat_initialized(ct, maniptype));
/* What we've got will look like inverse of reply. Normally
- this is what is in the conntrack, except for prior
- manipulations (future optimization: if num_manips == 0,
- orig_tp =
- conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple) */
+ * this is what is in the conntrack, except for prior
+ * manipulations (future optimization: if num_manips == 0,
+ * orig_tp = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
+ */
nf_ct_invert_tuplepr(&curr_tuple,
&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
@@ -317,11 +411,11 @@ nf_nat_setup_info(struct nf_conn *ct,
srchash = hash_by_src(net, nf_ct_zone(ct),
&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
spin_lock_bh(&nf_nat_lock);
- /* nf_conntrack_alter_reply might re-allocate extension area */
+ /* nf_conntrack_alter_reply might re-allocate exntension aera */
nat = nfct_nat(ct);
nat->ct = ct;
hlist_add_head_rcu(&nat->bysource,
- &net->ipv4.nat_bysource[srchash]);
+ &net->ct.nat_bysource[srchash]);
spin_unlock_bh(&nf_nat_lock);
}
@@ -335,47 +429,14 @@ nf_nat_setup_info(struct nf_conn *ct,
}
EXPORT_SYMBOL(nf_nat_setup_info);
-/* Returns true if succeeded. */
-static bool
-manip_pkt(u_int16_t proto,
- struct sk_buff *skb,
- unsigned int iphdroff,
- const struct nf_conntrack_tuple *target,
- enum nf_nat_manip_type maniptype)
-{
- struct iphdr *iph;
- const struct nf_nat_protocol *p;
-
- if (!skb_make_writable(skb, iphdroff + sizeof(*iph)))
- return false;
-
- iph = (void *)skb->data + iphdroff;
-
- /* Manipulate protcol part. */
-
- /* rcu_read_lock()ed by nf_hook_slow */
- p = __nf_nat_proto_find(proto);
- if (!p->manip_pkt(skb, iphdroff, target, maniptype))
- return false;
-
- iph = (void *)skb->data + iphdroff;
-
- if (maniptype == NF_NAT_MANIP_SRC) {
- csum_replace4(&iph->check, iph->saddr, target->src.u3.ip);
- iph->saddr = target->src.u3.ip;
- } else {
- csum_replace4(&iph->check, iph->daddr, target->dst.u3.ip);
- iph->daddr = target->dst.u3.ip;
- }
- return true;
-}
-
/* Do packet manipulations according to nf_nat_setup_info. */
unsigned int nf_nat_packet(struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned int hooknum,
struct sk_buff *skb)
{
+ const struct nf_nat_l3proto *l3proto;
+ const struct nf_nat_l4proto *l4proto;
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
unsigned long statusbit;
enum nf_nat_manip_type mtype = HOOK2MANIP(hooknum);
@@ -396,129 +457,174 @@ unsigned int nf_nat_packet(struct nf_conn *ct,
/* We are aiming to look like inverse of other direction. */
nf_ct_invert_tuplepr(&target, &ct->tuplehash[!dir].tuple);
- if (!manip_pkt(target.dst.protonum, skb, 0, &target, mtype))
+ l3proto = __nf_nat_l3proto_find(target.src.l3num);
+ l4proto = __nf_nat_l4proto_find(target.src.l3num,
+ target.dst.protonum);
+ if (!l3proto->manip_pkt(skb, 0, l4proto, &target, mtype))
return NF_DROP;
}
return NF_ACCEPT;
}
EXPORT_SYMBOL_GPL(nf_nat_packet);
-/* Dir is direction ICMP is coming from (opposite to packet it contains) */
-int nf_nat_icmp_reply_translation(struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int hooknum,
- struct sk_buff *skb)
+struct nf_nat_proto_clean {
+ u8 l3proto;
+ u8 l4proto;
+ bool hash;
+};
+
+/* Clear NAT section of all conntracks, in case we're loaded again. */
+static int nf_nat_proto_clean(struct nf_conn *i, void *data)
{
- struct {
- struct icmphdr icmp;
- struct iphdr ip;
- } *inside;
- struct nf_conntrack_tuple target;
- int hdrlen = ip_hdrlen(skb);
- enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
- unsigned long statusbit;
- enum nf_nat_manip_type manip = HOOK2MANIP(hooknum);
+ const struct nf_nat_proto_clean *clean = data;
+ struct nf_conn_nat *nat = nfct_nat(i);
- if (!skb_make_writable(skb, hdrlen + sizeof(*inside)))
+ if (!nat)
return 0;
-
- inside = (void *)skb->data + hdrlen;
-
- /* We're actually going to mangle it beyond trivial checksum
- adjustment, so make sure the current checksum is correct. */
- if (nf_ip_checksum(skb, hooknum, hdrlen, 0))
+ if ((clean->l3proto && nf_ct_l3num(i) != clean->l3proto) ||
+ (clean->l4proto && nf_ct_protonum(i) != clean->l4proto))
return 0;
- /* Must be RELATED */
- NF_CT_ASSERT(skb->nfctinfo == IP_CT_RELATED ||
- skb->nfctinfo == IP_CT_RELATED_REPLY);
-
- /* Redirects on non-null nats must be dropped, else they'll
- start talking to each other without our translation, and be
- confused... --RR */
- if (inside->icmp.type == ICMP_REDIRECT) {
- /* If NAT isn't finished, assume it and drop. */
- if ((ct->status & IPS_NAT_DONE_MASK) != IPS_NAT_DONE_MASK)
- return 0;
-
- if (ct->status & IPS_NAT_MASK)
- return 0;
+ if (clean->hash) {
+ spin_lock_bh(&nf_nat_lock);
+ hlist_del_rcu(&nat->bysource);
+ spin_unlock_bh(&nf_nat_lock);
+ } else {
+ memset(nat, 0, sizeof(*nat));
+ i->status &= ~(IPS_NAT_MASK | IPS_NAT_DONE_MASK |
+ IPS_SEQ_ADJUST);
}
+ return 0;
+}
- if (manip == NF_NAT_MANIP_SRC)
- statusbit = IPS_SRC_NAT;
- else
- statusbit = IPS_DST_NAT;
-
- /* Invert if this is reply dir. */
- if (dir == IP_CT_DIR_REPLY)
- statusbit ^= IPS_NAT_MASK;
-
- if (!(ct->status & statusbit))
- return 1;
-
- pr_debug("icmp_reply_translation: translating error %p manip %u "
- "dir %s\n", skb, manip,
- dir == IP_CT_DIR_ORIGINAL ? "ORIG" : "REPLY");
-
- /* Change inner back to look like incoming packet. We do the
- opposite manip on this hook to normal, because it might not
- pass all hooks (locally-generated ICMP). Consider incoming
- packet: PREROUTING (DST manip), routing produces ICMP, goes
- through POSTROUTING (which must correct the DST manip). */
- if (!manip_pkt(inside->ip.protocol, skb, hdrlen + sizeof(inside->icmp),
- &ct->tuplehash[!dir].tuple, !manip))
- return 0;
+static void nf_nat_l4proto_clean(u8 l3proto, u8 l4proto)
+{
+ struct nf_nat_proto_clean clean = {
+ .l3proto = l3proto,
+ .l4proto = l4proto,
+ };
+ struct net *net;
+
+ rtnl_lock();
+ /* Step 1 - remove from bysource hash */
+ clean.hash = true;
+ for_each_net(net)
+ nf_ct_iterate_cleanup(net, nf_nat_proto_clean, &clean);
+ synchronize_rcu();
- if (skb->ip_summed != CHECKSUM_PARTIAL) {
- /* Reloading "inside" here since manip_pkt inner. */
- inside = (void *)skb->data + hdrlen;
- inside->icmp.checksum = 0;
- inside->icmp.checksum =
- csum_fold(skb_checksum(skb, hdrlen,
- skb->len - hdrlen, 0));
- }
+ /* Step 2 - clean NAT section */
+ clean.hash = false;
+ for_each_net(net)
+ nf_ct_iterate_cleanup(net, nf_nat_proto_clean, &clean);
+ rtnl_unlock();
+}
- /* Change outer to look the reply to an incoming packet
- * (proto 0 means don't invert per-proto part). */
- nf_ct_invert_tuplepr(&target, &ct->tuplehash[!dir].tuple);
- if (!manip_pkt(0, skb, 0, &target, manip))
- return 0;
+static void nf_nat_l3proto_clean(u8 l3proto)
+{
+ struct nf_nat_proto_clean clean = {
+ .l3proto = l3proto,
+ };
+ struct net *net;
+
+ rtnl_lock();
+ /* Step 1 - remove from bysource hash */
+ clean.hash = true;
+ for_each_net(net)
+ nf_ct_iterate_cleanup(net, nf_nat_proto_clean, &clean);
+ synchronize_rcu();
- return 1;
+ /* Step 2 - clean NAT section */
+ clean.hash = false;
+ for_each_net(net)
+ nf_ct_iterate_cleanup(net, nf_nat_proto_clean, &clean);
+ rtnl_unlock();
}
-EXPORT_SYMBOL_GPL(nf_nat_icmp_reply_translation);
/* Protocol registration. */
-int nf_nat_protocol_register(const struct nf_nat_protocol *proto)
+int nf_nat_l4proto_register(u8 l3proto, const struct nf_nat_l4proto *l4proto)
{
+ const struct nf_nat_l4proto **l4protos;
+ unsigned int i;
int ret = 0;
- spin_lock_bh(&nf_nat_lock);
+ mutex_lock(&nf_nat_proto_mutex);
+ if (nf_nat_l4protos[l3proto] == NULL) {
+ l4protos = kmalloc(IPPROTO_MAX * sizeof(struct nf_nat_l4proto *),
+ GFP_KERNEL);
+ if (l4protos == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ for (i = 0; i < IPPROTO_MAX; i++)
+ RCU_INIT_POINTER(l4protos[i], &nf_nat_l4proto_unknown);
+
+ /* Before making proto_array visible to lockless readers,
+ * we must make sure its content is committed to memory.
+ */
+ smp_wmb();
+
+ nf_nat_l4protos[l3proto] = l4protos;
+ }
+
if (rcu_dereference_protected(
- nf_nat_protos[proto->protonum],
- lockdep_is_held(&nf_nat_lock)
- ) != &nf_nat_unknown_protocol) {
+ nf_nat_l4protos[l3proto][l4proto->l4proto],
+ lockdep_is_held(&nf_nat_proto_mutex)
+ ) != &nf_nat_l4proto_unknown) {
ret = -EBUSY;
goto out;
}
- RCU_INIT_POINTER(nf_nat_protos[proto->protonum], proto);
+ RCU_INIT_POINTER(nf_nat_l4protos[l3proto][l4proto->l4proto], l4proto);
out:
- spin_unlock_bh(&nf_nat_lock);
+ mutex_unlock(&nf_nat_proto_mutex);
return ret;
}
-EXPORT_SYMBOL(nf_nat_protocol_register);
+EXPORT_SYMBOL_GPL(nf_nat_l4proto_register);
/* No one stores the protocol anywhere; simply delete it. */
-void nf_nat_protocol_unregister(const struct nf_nat_protocol *proto)
+void nf_nat_l4proto_unregister(u8 l3proto, const struct nf_nat_l4proto *l4proto)
{
- spin_lock_bh(&nf_nat_lock);
- RCU_INIT_POINTER(nf_nat_protos[proto->protonum],
- &nf_nat_unknown_protocol);
- spin_unlock_bh(&nf_nat_lock);
+ mutex_lock(&nf_nat_proto_mutex);
+ RCU_INIT_POINTER(nf_nat_l4protos[l3proto][l4proto->l4proto],
+ &nf_nat_l4proto_unknown);
+ mutex_unlock(&nf_nat_proto_mutex);
synchronize_rcu();
+
+ nf_nat_l4proto_clean(l3proto, l4proto->l4proto);
}
-EXPORT_SYMBOL(nf_nat_protocol_unregister);
+EXPORT_SYMBOL_GPL(nf_nat_l4proto_unregister);
+
+int nf_nat_l3proto_register(const struct nf_nat_l3proto *l3proto)
+{
+ int err;
+
+ err = nf_ct_l3proto_try_module_get(l3proto->l3proto);
+ if (err < 0)
+ return err;
+
+ mutex_lock(&nf_nat_proto_mutex);
+ RCU_INIT_POINTER(nf_nat_l4protos[l3proto->l3proto][IPPROTO_TCP],
+ &nf_nat_l4proto_tcp);
+ RCU_INIT_POINTER(nf_nat_l4protos[l3proto->l3proto][IPPROTO_UDP],
+ &nf_nat_l4proto_udp);
+ mutex_unlock(&nf_nat_proto_mutex);
+
+ RCU_INIT_POINTER(nf_nat_l3protos[l3proto->l3proto], l3proto);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(nf_nat_l3proto_register);
+
+void nf_nat_l3proto_unregister(const struct nf_nat_l3proto *l3proto)
+{
+ mutex_lock(&nf_nat_proto_mutex);
+ RCU_INIT_POINTER(nf_nat_l3protos[l3proto->l3proto], NULL);
+ mutex_unlock(&nf_nat_proto_mutex);
+ synchronize_rcu();
+
+ nf_nat_l3proto_clean(l3proto->l3proto);
+ nf_ct_l3proto_module_put(l3proto->l3proto);
+}
+EXPORT_SYMBOL_GPL(nf_nat_l3proto_unregister);
/* No one using conntrack by the time this called. */
static void nf_nat_cleanup_conntrack(struct nf_conn *ct)
@@ -570,34 +676,34 @@ static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = {
static int nfnetlink_parse_nat_proto(struct nlattr *attr,
const struct nf_conn *ct,
- struct nf_nat_ipv4_range *range)
+ struct nf_nat_range *range)
{
struct nlattr *tb[CTA_PROTONAT_MAX+1];
- const struct nf_nat_protocol *npt;
+ const struct nf_nat_l4proto *l4proto;
int err;
err = nla_parse_nested(tb, CTA_PROTONAT_MAX, attr, protonat_nla_policy);
if (err < 0)
return err;
- rcu_read_lock();
- npt = __nf_nat_proto_find(nf_ct_protonum(ct));
- if (npt->nlattr_to_range)
- err = npt->nlattr_to_range(tb, range);
- rcu_read_unlock();
+ l4proto = __nf_nat_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
+ if (l4proto->nlattr_to_range)
+ err = l4proto->nlattr_to_range(tb, range);
+
return err;
}
static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = {
- [CTA_NAT_MINIP] = { .type = NLA_U32 },
- [CTA_NAT_MAXIP] = { .type = NLA_U32 },
+ [CTA_NAT_V4_MINIP] = { .type = NLA_U32 },
+ [CTA_NAT_V4_MAXIP] = { .type = NLA_U32 },
[CTA_NAT_PROTO] = { .type = NLA_NESTED },
};
static int
nfnetlink_parse_nat(const struct nlattr *nat,
- const struct nf_conn *ct, struct nf_nat_ipv4_range *range)
+ const struct nf_conn *ct, struct nf_nat_range *range)
{
+ const struct nf_nat_l3proto *l3proto;
struct nlattr *tb[CTA_NAT_MAX+1];
int err;
@@ -607,25 +713,23 @@ nfnetlink_parse_nat(const struct nlattr *nat,
if (err < 0)
return err;
- if (tb[CTA_NAT_MINIP])
- range->min_ip = nla_get_be32(tb[CTA_NAT_MINIP]);
-
- if (!tb[CTA_NAT_MAXIP])
- range->max_ip = range->min_ip;
- else
- range->max_ip = nla_get_be32(tb[CTA_NAT_MAXIP]);
-
- if (range->min_ip)
- range->flags |= NF_NAT_RANGE_MAP_IPS;
+ rcu_read_lock();
+ l3proto = __nf_nat_l3proto_find(nf_ct_l3num(ct));
+ if (l3proto == NULL) {
+ err = -EAGAIN;
+ goto out;
+ }
+ err = l3proto->nlattr_to_range(tb, range);
+ if (err < 0)
+ goto out;
if (!tb[CTA_NAT_PROTO])
- return 0;
+ goto out;
err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range);
- if (err < 0)
- return err;
-
- return 0;
+out:
+ rcu_read_unlock();
+ return err;
}
static int
@@ -633,10 +737,12 @@ nfnetlink_parse_nat_setup(struct nf_conn *ct,
enum nf_nat_manip_type manip,
const struct nlattr *attr)
{
- struct nf_nat_ipv4_range range;
+ struct nf_nat_range range;
+ int err;
- if (nfnetlink_parse_nat(attr, ct, &range) < 0)
- return -EINVAL;
+ err = nfnetlink_parse_nat(attr, ct, &range);
+ if (err < 0)
+ return err;
if (nf_nat_initialized(ct, manip))
return -EEXIST;
@@ -655,30 +761,20 @@ nfnetlink_parse_nat_setup(struct nf_conn *ct,
static int __net_init nf_nat_net_init(struct net *net)
{
/* Leave them the same for the moment. */
- net->ipv4.nat_htable_size = net->ct.htable_size;
- net->ipv4.nat_bysource = nf_ct_alloc_hashtable(&net->ipv4.nat_htable_size, 0);
- if (!net->ipv4.nat_bysource)
+ net->ct.nat_htable_size = net->ct.htable_size;
+ net->ct.nat_bysource = nf_ct_alloc_hashtable(&net->ct.nat_htable_size, 0);
+ if (!net->ct.nat_bysource)
return -ENOMEM;
return 0;
}
-/* Clear NAT section of all conntracks, in case we're loaded again. */
-static int clean_nat(struct nf_conn *i, void *data)
-{
- struct nf_conn_nat *nat = nfct_nat(i);
-
- if (!nat)
- return 0;
- memset(nat, 0, sizeof(*nat));
- i->status &= ~(IPS_NAT_MASK | IPS_NAT_DONE_MASK | IPS_SEQ_ADJUST);
- return 0;
-}
-
static void __net_exit nf_nat_net_exit(struct net *net)
{
- nf_ct_iterate_cleanup(net, &clean_nat, NULL);
+ struct nf_nat_proto_clean clean = {};
+
+ nf_ct_iterate_cleanup(net, &nf_nat_proto_clean, &clean);
synchronize_rcu();
- nf_ct_free_hashtable(net->ipv4.nat_bysource, net->ipv4.nat_htable_size);
+ nf_ct_free_hashtable(net->ct.nat_bysource, net->ct.nat_htable_size);
}
static struct pernet_operations nf_nat_net_ops = {
@@ -697,11 +793,8 @@ static struct nfq_ct_nat_hook nfq_ct_nat = {
static int __init nf_nat_init(void)
{
- size_t i;
int ret;
- need_ipv4_conntrack();
-
ret = nf_ct_extend_register(&nat_extend);
if (ret < 0) {
printk(KERN_ERR "nf_nat_core: Unable to register extension\n");
@@ -712,22 +805,11 @@ static int __init nf_nat_init(void)
if (ret < 0)
goto cleanup_extend;
- /* Sew in builtin protocols. */
- spin_lock_bh(&nf_nat_lock);
- for (i = 0; i < MAX_IP_NAT_PROTO; i++)
- RCU_INIT_POINTER(nf_nat_protos[i], &nf_nat_unknown_protocol);
- RCU_INIT_POINTER(nf_nat_protos[IPPROTO_TCP], &nf_nat_protocol_tcp);
- RCU_INIT_POINTER(nf_nat_protos[IPPROTO_UDP], &nf_nat_protocol_udp);
- RCU_INIT_POINTER(nf_nat_protos[IPPROTO_ICMP], &nf_nat_protocol_icmp);
- spin_unlock_bh(&nf_nat_lock);
+ nf_ct_helper_expectfn_register(&follow_master_nat);
/* Initialize fake conntrack so that NAT will skip it */
nf_ct_untracked_status_or(IPS_NAT_DONE_MASK);
- l3proto = nf_ct_l3proto_find_get((u_int16_t)AF_INET);
-
- nf_ct_helper_expectfn_register(&follow_master_nat);
-
BUG_ON(nf_nat_seq_adjust_hook != NULL);
RCU_INIT_POINTER(nf_nat_seq_adjust_hook, nf_nat_seq_adjust);
BUG_ON(nfnetlink_parse_nat_setup_hook != NULL);
@@ -736,6 +818,10 @@ static int __init nf_nat_init(void)
BUG_ON(nf_ct_nat_offset != NULL);
RCU_INIT_POINTER(nf_ct_nat_offset, nf_nat_get_offset);
RCU_INIT_POINTER(nfq_ct_nat_hook, &nfq_ct_nat);
+#ifdef CONFIG_XFRM
+ BUG_ON(nf_nat_decode_session_hook != NULL);
+ RCU_INIT_POINTER(nf_nat_decode_session_hook, __nf_nat_decode_session);
+#endif
return 0;
cleanup_extend:
@@ -745,19 +831,24 @@ static int __init nf_nat_init(void)
static void __exit nf_nat_cleanup(void)
{
+ unsigned int i;
+
unregister_pernet_subsys(&nf_nat_net_ops);
- nf_ct_l3proto_put(l3proto);
nf_ct_extend_unregister(&nat_extend);
nf_ct_helper_expectfn_unregister(&follow_master_nat);
RCU_INIT_POINTER(nf_nat_seq_adjust_hook, NULL);
RCU_INIT_POINTER(nfnetlink_parse_nat_setup_hook, NULL);
RCU_INIT_POINTER(nf_ct_nat_offset, NULL);
RCU_INIT_POINTER(nfq_ct_nat_hook, NULL);
+#ifdef CONFIG_XFRM
+ RCU_INIT_POINTER(nf_nat_decode_session_hook, NULL);
+#endif
+ for (i = 0; i < NFPROTO_NUMPROTO; i++)
+ kfree(nf_nat_l4protos[i]);
synchronize_net();
}
MODULE_LICENSE("GPL");
-MODULE_ALIAS("nf-nat-ipv4");
module_init(nf_nat_init);
module_exit(nf_nat_cleanup);
diff --git a/net/ipv4/netfilter/nf_nat_helper.c b/net/netfilter/nf_nat_helper.c
similarity index 83%
rename from net/ipv4/netfilter/nf_nat_helper.c
rename to net/netfilter/nf_nat_helper.c
index 2fefec5..23c2b38 100644
--- a/net/ipv4/netfilter/nf_nat_helper.c
+++ b/net/netfilter/nf_nat_helper.c
@@ -1,4 +1,4 @@
-/* ip_nat_helper.c - generic support functions for NAT helpers
+/* nf_nat_helper.c - generic support functions for NAT helpers
*
* (C) 2000-2002 Harald Welte <laforge@netfilter.org>
* (C) 2003-2006 Netfilter Core Team <coreteam@netfilter.org>
@@ -9,23 +9,19 @@
*/
#include <linux/module.h>
#include <linux/gfp.h>
-#include <linux/kmod.h>
#include <linux/types.h>
-#include <linux/timer.h>
#include <linux/skbuff.h>
#include <linux/tcp.h>
#include <linux/udp.h>
-#include <net/checksum.h>
#include <net/tcp.h>
-#include <net/route.h>
-#include <linux/netfilter_ipv4.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/netfilter/nf_nat_l4proto.h>
#include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_helper.h>
@@ -90,7 +86,6 @@ s16 nf_nat_get_offset(const struct nf_conn *ct,
return offset;
}
-EXPORT_SYMBOL_GPL(nf_nat_get_offset);
/* Frobs data inside this packet, which is linear. */
static void mangle_contents(struct sk_buff *skb,
@@ -125,9 +120,13 @@ static void mangle_contents(struct sk_buff *skb,
__skb_trim(skb, skb->len + rep_len - match_len);
}
- /* fix IP hdr checksum information */
- ip_hdr(skb)->tot_len = htons(skb->len);
- ip_send_check(ip_hdr(skb));
+ if (nf_ct_l3num((struct nf_conn *)skb->nfct) == NFPROTO_IPV4) {
+ /* fix IP hdr checksum information */
+ ip_hdr(skb)->tot_len = htons(skb->len);
+ ip_send_check(ip_hdr(skb));
+ } else
+ ipv6_hdr(skb)->payload_len =
+ htons(skb->len - sizeof(struct ipv6hdr));
}
/* Unusual, but possible case. */
@@ -166,35 +165,6 @@ void nf_nat_tcp_seq_adjust(struct sk_buff *skb, struct nf_conn *ct,
}
EXPORT_SYMBOL_GPL(nf_nat_tcp_seq_adjust);
-static void nf_nat_csum(struct sk_buff *skb, const struct iphdr *iph, void *data,
- int datalen, __sum16 *check, int oldlen)
-{
- struct rtable *rt = skb_rtable(skb);
-
- if (skb->ip_summed != CHECKSUM_PARTIAL) {
- if (!(rt->rt_flags & RTCF_LOCAL) &&
- (!skb->dev || skb->dev->features & NETIF_F_V4_CSUM)) {
- skb->ip_summed = CHECKSUM_PARTIAL;
- skb->csum_start = skb_headroom(skb) +
- skb_network_offset(skb) +
- iph->ihl * 4;
- skb->csum_offset = (void *)check - data;
- *check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
- datalen, iph->protocol, 0);
- } else {
- *check = 0;
- *check = csum_tcpudp_magic(iph->saddr, iph->daddr,
- datalen, iph->protocol,
- csum_partial(data, datalen,
- 0));
- if (iph->protocol == IPPROTO_UDP && !*check)
- *check = CSUM_MANGLED_0;
- }
- } else
- inet_proto_csum_replace2(check, skb,
- htons(oldlen), htons(datalen), 1);
-}
-
/* Generic function for mangling variable-length address changes inside
* NATed TCP connections (like the PORT XXX,XXX,XXX,XXX,XXX,XXX
* command in FTP).
@@ -212,7 +182,7 @@ int __nf_nat_mangle_tcp_packet(struct sk_buff *skb,
const char *rep_buffer,
unsigned int rep_len, bool adjust)
{
- struct iphdr *iph;
+ const struct nf_nat_l3proto *l3proto;
struct tcphdr *tcph;
int oldlen, datalen;
@@ -226,15 +196,17 @@ int __nf_nat_mangle_tcp_packet(struct sk_buff *skb,
SKB_LINEAR_ASSERT(skb);
- iph = ip_hdr(skb);
- tcph = (void *)iph + iph->ihl*4;
+ tcph = (void *)skb->data + protoff;
- oldlen = skb->len - iph->ihl*4;
- mangle_contents(skb, iph->ihl*4 + tcph->doff*4,
+ oldlen = skb->len - protoff;
+ mangle_contents(skb, protoff + tcph->doff*4,
match_offset, match_len, rep_buffer, rep_len);
- datalen = skb->len - iph->ihl*4;
- nf_nat_csum(skb, iph, tcph, datalen, &tcph->check, oldlen);
+ datalen = skb->len - protoff;
+
+ l3proto = __nf_nat_l3proto_find(nf_ct_l3num(ct));
+ l3proto->csum_recalc(skb, IPPROTO_TCP, tcph, &tcph->check,
+ datalen, oldlen);
if (adjust && rep_len != match_len)
nf_nat_set_seq_adjust(ct, ctinfo, tcph->seq,
@@ -264,7 +236,7 @@ nf_nat_mangle_udp_packet(struct sk_buff *skb,
const char *rep_buffer,
unsigned int rep_len)
{
- struct iphdr *iph;
+ const struct nf_nat_l3proto *l3proto;
struct udphdr *udph;
int datalen, oldlen;
@@ -276,22 +248,23 @@ nf_nat_mangle_udp_packet(struct sk_buff *skb,
!enlarge_skb(skb, rep_len - match_len))
return 0;
- iph = ip_hdr(skb);
- udph = (void *)iph + iph->ihl*4;
+ udph = (void *)skb->data + protoff;
- oldlen = skb->len - iph->ihl*4;
- mangle_contents(skb, iph->ihl*4 + sizeof(*udph),
+ oldlen = skb->len - protoff;
+ mangle_contents(skb, protoff + sizeof(*udph),
match_offset, match_len, rep_buffer, rep_len);
/* update the length of the UDP packet */
- datalen = skb->len - iph->ihl*4;
+ datalen = skb->len - protoff;
udph->len = htons(datalen);
/* fix udp checksum if udp checksum was previously calculated */
if (!udph->check && skb->ip_summed != CHECKSUM_PARTIAL)
return 1;
- nf_nat_csum(skb, iph, udph, datalen, &udph->check, oldlen);
+ l3proto = __nf_nat_l3proto_find(nf_ct_l3num(ct));
+ l3proto->csum_recalc(skb, IPPROTO_UDP, udph, &udph->check,
+ datalen, oldlen);
return 1;
}
@@ -343,6 +316,7 @@ sack_adjust(struct sk_buff *skb,
/* TCP SACK sequence number adjustment */
static inline unsigned int
nf_nat_sack_adjust(struct sk_buff *skb,
+ unsigned int protoff,
struct tcphdr *tcph,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo)
@@ -350,8 +324,8 @@ nf_nat_sack_adjust(struct sk_buff *skb,
unsigned int dir, optoff, optend;
struct nf_conn_nat *nat = nfct_nat(ct);
- optoff = ip_hdrlen(skb) + sizeof(struct tcphdr);
- optend = ip_hdrlen(skb) + tcph->doff * 4;
+ optoff = protoff + sizeof(struct tcphdr);
+ optend = protoff + tcph->doff * 4;
if (!skb_make_writable(skb, optend))
return 0;
@@ -432,7 +406,7 @@ nf_nat_seq_adjust(struct sk_buff *skb,
tcph->seq = newseq;
tcph->ack_seq = newack;
- return nf_nat_sack_adjust(skb, tcph, ct, ctinfo);
+ return nf_nat_sack_adjust(skb, protoff, tcph, ct, ctinfo);
}
/* Setup NAT on this expected conntrack so it follows master. */
@@ -440,22 +414,22 @@ nf_nat_seq_adjust(struct sk_buff *skb,
void nf_nat_follow_master(struct nf_conn *ct,
struct nf_conntrack_expect *exp)
{
- struct nf_nat_ipv4_range range;
+ struct nf_nat_range range;
/* This must be a fresh one. */
BUG_ON(ct->status & IPS_NAT_DONE_MASK);
/* Change src to where master sends to */
range.flags = NF_NAT_RANGE_MAP_IPS;
- range.min_ip = range.max_ip
- = ct->master->tuplehash[!exp->dir].tuple.dst.u3.ip;
+ range.min_addr = range.max_addr
+ = ct->master->tuplehash[!exp->dir].tuple.dst.u3;
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
/* For DST manip, map port here to where it's expected. */
range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
- range.min = range.max = exp->saved_proto;
- range.min_ip = range.max_ip
- = ct->master->tuplehash[!exp->dir].tuple.src.u3.ip;
+ range.min_proto = range.max_proto = exp->saved_proto;
+ range.min_addr = range.max_addr
+ = ct->master->tuplehash[!exp->dir].tuple.src.u3;
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
}
EXPORT_SYMBOL(nf_nat_follow_master);
diff --git a/net/ipv4/netfilter/nf_nat_proto_common.c b/net/netfilter/nf_nat_proto_common.c
similarity index 62%
rename from net/ipv4/netfilter/nf_nat_proto_common.c
rename to net/netfilter/nf_nat_proto_common.c
index 9993bc9..9baaf73 100644
--- a/net/ipv4/netfilter/nf_nat_proto_common.c
+++ b/net/netfilter/nf_nat_proto_common.c
@@ -9,20 +9,18 @@
#include <linux/types.h>
#include <linux/random.h>
-#include <linux/ip.h>
-
#include <linux/netfilter.h>
#include <linux/export.h>
-#include <net/secure_seq.h>
+
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h>
-#include <net/netfilter/nf_nat_rule.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/netfilter/nf_nat_l4proto.h>
-bool nf_nat_proto_in_range(const struct nf_conntrack_tuple *tuple,
- enum nf_nat_manip_type maniptype,
- const union nf_conntrack_man_proto *min,
- const union nf_conntrack_man_proto *max)
+bool nf_nat_l4proto_in_range(const struct nf_conntrack_tuple *tuple,
+ enum nf_nat_manip_type maniptype,
+ const union nf_conntrack_man_proto *min,
+ const union nf_conntrack_man_proto *max)
{
__be16 port;
@@ -34,13 +32,14 @@ bool nf_nat_proto_in_range(const struct nf_conntrack_tuple *tuple,
return ntohs(port) >= ntohs(min->all) &&
ntohs(port) <= ntohs(max->all);
}
-EXPORT_SYMBOL_GPL(nf_nat_proto_in_range);
+EXPORT_SYMBOL_GPL(nf_nat_l4proto_in_range);
-void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
- enum nf_nat_manip_type maniptype,
- const struct nf_conn *ct,
- u_int16_t *rover)
+void nf_nat_l4proto_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
+ enum nf_nat_manip_type maniptype,
+ const struct nf_conn *ct,
+ u16 *rover)
{
unsigned int range_size, min, i;
__be16 *portptr;
@@ -71,15 +70,14 @@ void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple,
range_size = 65535 - 1024 + 1;
}
} else {
- min = ntohs(range->min.all);
- range_size = ntohs(range->max.all) - min + 1;
+ min = ntohs(range->min_proto.all);
+ range_size = ntohs(range->max_proto.all) - min + 1;
}
if (range->flags & NF_NAT_RANGE_PROTO_RANDOM)
- off = secure_ipv4_port_ephemeral(tuple->src.u3.ip, tuple->dst.u3.ip,
- maniptype == NF_NAT_MANIP_SRC
- ? tuple->dst.u.all
- : tuple->src.u.all);
+ off = l3proto->secure_port(tuple, maniptype == NF_NAT_MANIP_SRC
+ ? tuple->dst.u.all
+ : tuple->src.u.all);
else
off = *rover;
@@ -93,22 +91,22 @@ void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple,
}
return;
}
-EXPORT_SYMBOL_GPL(nf_nat_proto_unique_tuple);
+EXPORT_SYMBOL_GPL(nf_nat_l4proto_unique_tuple);
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
-int nf_nat_proto_nlattr_to_range(struct nlattr *tb[],
- struct nf_nat_ipv4_range *range)
+int nf_nat_l4proto_nlattr_to_range(struct nlattr *tb[],
+ struct nf_nat_range *range)
{
if (tb[CTA_PROTONAT_PORT_MIN]) {
- range->min.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MIN]);
- range->max.all = range->min.tcp.port;
+ range->min_proto.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MIN]);
+ range->max_proto.all = range->min_proto.all;
range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
}
if (tb[CTA_PROTONAT_PORT_MAX]) {
- range->max.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MAX]);
+ range->max_proto.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MAX]);
range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
}
return 0;
}
-EXPORT_SYMBOL_GPL(nf_nat_proto_nlattr_to_range);
+EXPORT_SYMBOL_GPL(nf_nat_l4proto_nlattr_to_range);
#endif
diff --git a/net/ipv4/netfilter/nf_nat_proto_dccp.c b/net/netfilter/nf_nat_proto_dccp.c
similarity index 61%
rename from net/ipv4/netfilter/nf_nat_proto_dccp.c
rename to net/netfilter/nf_nat_proto_dccp.c
index 3f67138..c8be2cd 100644
--- a/net/ipv4/netfilter/nf_nat_proto_dccp.c
+++ b/net/netfilter/nf_nat_proto_dccp.c
@@ -1,7 +1,7 @@
/*
* DCCP NAT protocol helper
*
- * Copyright (c) 2005, 2006. 2008 Patrick McHardy <kaber@trash.net>
+ * Copyright (c) 2005, 2006, 2008 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -13,35 +13,34 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/skbuff.h>
-#include <linux/ip.h>
#include <linux/dccp.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/netfilter/nf_nat_l4proto.h>
static u_int16_t dccp_port_rover;
static void
-dccp_unique_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
+dccp_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
- nf_nat_proto_unique_tuple(tuple, range, maniptype, ct,
- &dccp_port_rover);
+ nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
+ &dccp_port_rover);
}
static bool
dccp_manip_pkt(struct sk_buff *skb,
- unsigned int iphdroff,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype)
{
- const struct iphdr *iph = (const void *)(skb->data + iphdroff);
struct dccp_hdr *hdr;
- unsigned int hdroff = iphdroff + iph->ihl * 4;
- __be32 oldip, newip;
__be16 *portptr, oldport, newport;
int hdrsize = 8; /* DCCP connection tracking guarantees this much */
@@ -51,17 +50,12 @@ dccp_manip_pkt(struct sk_buff *skb,
if (!skb_make_writable(skb, hdroff + hdrsize))
return false;
- iph = (struct iphdr *)(skb->data + iphdroff);
hdr = (struct dccp_hdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) {
- oldip = iph->saddr;
- newip = tuple->src.u3.ip;
newport = tuple->src.u.dccp.port;
portptr = &hdr->dccph_sport;
} else {
- oldip = iph->daddr;
- newip = tuple->dst.u3.ip;
newport = tuple->dst.u.dccp.port;
portptr = &hdr->dccph_dport;
}
@@ -72,30 +66,46 @@ dccp_manip_pkt(struct sk_buff *skb,
if (hdrsize < sizeof(*hdr))
return true;
- inet_proto_csum_replace4(&hdr->dccph_checksum, skb, oldip, newip, 1);
+ l3proto->csum_update(skb, iphdroff, &hdr->dccph_checksum,
+ tuple, maniptype);
inet_proto_csum_replace2(&hdr->dccph_checksum, skb, oldport, newport,
0);
return true;
}
-static const struct nf_nat_protocol nf_nat_protocol_dccp = {
- .protonum = IPPROTO_DCCP,
+static const struct nf_nat_l4proto nf_nat_l4proto_dccp = {
+ .l4proto = IPPROTO_DCCP,
.manip_pkt = dccp_manip_pkt,
- .in_range = nf_nat_proto_in_range,
+ .in_range = nf_nat_l4proto_in_range,
.unique_tuple = dccp_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
- .nlattr_to_range = nf_nat_proto_nlattr_to_range,
+ .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif
};
static int __init nf_nat_proto_dccp_init(void)
{
- return nf_nat_protocol_register(&nf_nat_protocol_dccp);
+ int err;
+
+ err = nf_nat_l4proto_register(NFPROTO_IPV4, &nf_nat_l4proto_dccp);
+ if (err < 0)
+ goto err1;
+ err = nf_nat_l4proto_register(NFPROTO_IPV6, &nf_nat_l4proto_dccp);
+ if (err < 0)
+ goto err2;
+ return 0;
+
+err2:
+ nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_dccp);
+err1:
+ return err;
}
static void __exit nf_nat_proto_dccp_fini(void)
{
- nf_nat_protocol_unregister(&nf_nat_protocol_dccp);
+ nf_nat_l4proto_unregister(NFPROTO_IPV6, &nf_nat_l4proto_dccp);
+ nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_dccp);
+
}
module_init(nf_nat_proto_dccp_init);
diff --git a/net/ipv4/netfilter/nf_nat_proto_sctp.c b/net/netfilter/nf_nat_proto_sctp.c
similarity index 61%
rename from net/ipv4/netfilter/nf_nat_proto_sctp.c
rename to net/netfilter/nf_nat_proto_sctp.c
index 3cce9b6..e64faa5 100644
--- a/net/ipv4/netfilter/nf_nat_proto_sctp.c
+++ b/net/netfilter/nf_nat_proto_sctp.c
@@ -8,53 +8,46 @@
#include <linux/types.h>
#include <linux/init.h>
-#include <linux/ip.h>
#include <linux/sctp.h>
#include <linux/module.h>
#include <net/sctp/checksum.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l4proto.h>
static u_int16_t nf_sctp_port_rover;
static void
-sctp_unique_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
+sctp_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
- nf_nat_proto_unique_tuple(tuple, range, maniptype, ct,
- &nf_sctp_port_rover);
+ nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
+ &nf_sctp_port_rover);
}
static bool
sctp_manip_pkt(struct sk_buff *skb,
- unsigned int iphdroff,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype)
{
- const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
struct sk_buff *frag;
sctp_sctphdr_t *hdr;
- unsigned int hdroff = iphdroff + iph->ihl*4;
- __be32 oldip, newip;
__be32 crc32;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false;
- iph = (struct iphdr *)(skb->data + iphdroff);
hdr = (struct sctphdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) {
- /* Get rid of src ip and src pt */
- oldip = iph->saddr;
- newip = tuple->src.u3.ip;
+ /* Get rid of src port */
hdr->source = tuple->src.u.sctp.port;
} else {
- /* Get rid of dst ip and dst pt */
- oldip = iph->daddr;
- newip = tuple->dst.u3.ip;
+ /* Get rid of dst port */
hdr->dest = tuple->dst.u.sctp.port;
}
@@ -68,24 +61,38 @@ sctp_manip_pkt(struct sk_buff *skb,
return true;
}
-static const struct nf_nat_protocol nf_nat_protocol_sctp = {
- .protonum = IPPROTO_SCTP,
+static const struct nf_nat_l4proto nf_nat_l4proto_sctp = {
+ .l4proto = IPPROTO_SCTP,
.manip_pkt = sctp_manip_pkt,
- .in_range = nf_nat_proto_in_range,
+ .in_range = nf_nat_l4proto_in_range,
.unique_tuple = sctp_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
- .nlattr_to_range = nf_nat_proto_nlattr_to_range,
+ .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif
};
static int __init nf_nat_proto_sctp_init(void)
{
- return nf_nat_protocol_register(&nf_nat_protocol_sctp);
+ int err;
+
+ err = nf_nat_l4proto_register(NFPROTO_IPV4, &nf_nat_l4proto_sctp);
+ if (err < 0)
+ goto err1;
+ err = nf_nat_l4proto_register(NFPROTO_IPV6, &nf_nat_l4proto_sctp);
+ if (err < 0)
+ goto err2;
+ return 0;
+
+err2:
+ nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_sctp);
+err1:
+ return err;
}
static void __exit nf_nat_proto_sctp_exit(void)
{
- nf_nat_protocol_unregister(&nf_nat_protocol_sctp);
+ nf_nat_l4proto_unregister(NFPROTO_IPV6, &nf_nat_l4proto_sctp);
+ nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_sctp);
}
module_init(nf_nat_proto_sctp_init);
diff --git a/net/ipv4/netfilter/nf_nat_proto_tcp.c b/net/netfilter/nf_nat_proto_tcp.c
similarity index 65%
rename from net/ipv4/netfilter/nf_nat_proto_tcp.c
rename to net/netfilter/nf_nat_proto_tcp.c
index 9fb4b4e..83ec8a6 100644
--- a/net/ipv4/netfilter/nf_nat_proto_tcp.c
+++ b/net/netfilter/nf_nat_proto_tcp.c
@@ -9,37 +9,36 @@
#include <linux/types.h>
#include <linux/init.h>
#include <linux/export.h>
-#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nfnetlink_conntrack.h>
#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_rule.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/netfilter/nf_nat_l4proto.h>
#include <net/netfilter/nf_nat_core.h>
-static u_int16_t tcp_port_rover;
+static u16 tcp_port_rover;
static void
-tcp_unique_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
+tcp_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
- nf_nat_proto_unique_tuple(tuple, range, maniptype, ct, &tcp_port_rover);
+ nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
+ &tcp_port_rover);
}
static bool
tcp_manip_pkt(struct sk_buff *skb,
- unsigned int iphdroff,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype)
{
- const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
struct tcphdr *hdr;
- unsigned int hdroff = iphdroff + iph->ihl*4;
- __be32 oldip, newip;
__be16 *portptr, newport, oldport;
int hdrsize = 8; /* TCP connection tracking guarantees this much */
@@ -52,19 +51,14 @@ tcp_manip_pkt(struct sk_buff *skb,
if (!skb_make_writable(skb, hdroff + hdrsize))
return false;
- iph = (struct iphdr *)(skb->data + iphdroff);
hdr = (struct tcphdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) {
- /* Get rid of src ip and src pt */
- oldip = iph->saddr;
- newip = tuple->src.u3.ip;
+ /* Get rid of src port */
newport = tuple->src.u.tcp.port;
portptr = &hdr->source;
} else {
- /* Get rid of dst ip and dst pt */
- oldip = iph->daddr;
- newip = tuple->dst.u3.ip;
+ /* Get rid of dst port */
newport = tuple->dst.u.tcp.port;
portptr = &hdr->dest;
}
@@ -75,17 +69,17 @@ tcp_manip_pkt(struct sk_buff *skb,
if (hdrsize < sizeof(*hdr))
return true;
- inet_proto_csum_replace4(&hdr->check, skb, oldip, newip, 1);
+ l3proto->csum_update(skb, iphdroff, &hdr->check, tuple, maniptype);
inet_proto_csum_replace2(&hdr->check, skb, oldport, newport, 0);
return true;
}
-const struct nf_nat_protocol nf_nat_protocol_tcp = {
- .protonum = IPPROTO_TCP,
+const struct nf_nat_l4proto nf_nat_l4proto_tcp = {
+ .l4proto = IPPROTO_TCP,
.manip_pkt = tcp_manip_pkt,
- .in_range = nf_nat_proto_in_range,
+ .in_range = nf_nat_l4proto_in_range,
.unique_tuple = tcp_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
- .nlattr_to_range = nf_nat_proto_nlattr_to_range,
+ .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif
};
diff --git a/net/ipv4/netfilter/nf_nat_proto_udp.c b/net/netfilter/nf_nat_proto_udp.c
similarity index 60%
rename from net/ipv4/netfilter/nf_nat_proto_udp.c
rename to net/netfilter/nf_nat_proto_udp.c
index 9883336..7df613f 100644
--- a/net/ipv4/netfilter/nf_nat_proto_udp.c
+++ b/net/netfilter/nf_nat_proto_udp.c
@@ -9,59 +9,53 @@
#include <linux/types.h>
#include <linux/export.h>
#include <linux/init.h>
-#include <linux/ip.h>
#include <linux/udp.h>
#include <linux/netfilter.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h>
-#include <net/netfilter/nf_nat_rule.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/netfilter/nf_nat_l4proto.h>
-static u_int16_t udp_port_rover;
+static u16 udp_port_rover;
static void
-udp_unique_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
+udp_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
- nf_nat_proto_unique_tuple(tuple, range, maniptype, ct, &udp_port_rover);
+ nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
+ &udp_port_rover);
}
static bool
udp_manip_pkt(struct sk_buff *skb,
- unsigned int iphdroff,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype)
{
- const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
struct udphdr *hdr;
- unsigned int hdroff = iphdroff + iph->ihl*4;
- __be32 oldip, newip;
__be16 *portptr, newport;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false;
-
- iph = (struct iphdr *)(skb->data + iphdroff);
hdr = (struct udphdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) {
- /* Get rid of src ip and src pt */
- oldip = iph->saddr;
- newip = tuple->src.u3.ip;
+ /* Get rid of src port */
newport = tuple->src.u.udp.port;
portptr = &hdr->source;
} else {
- /* Get rid of dst ip and dst pt */
- oldip = iph->daddr;
- newip = tuple->dst.u3.ip;
+ /* Get rid of dst port */
newport = tuple->dst.u.udp.port;
portptr = &hdr->dest;
}
if (hdr->check || skb->ip_summed == CHECKSUM_PARTIAL) {
- inet_proto_csum_replace4(&hdr->check, skb, oldip, newip, 1);
+ l3proto->csum_update(skb, iphdroff, &hdr->check,
+ tuple, maniptype);
inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport,
0);
if (!hdr->check)
@@ -71,12 +65,12 @@ udp_manip_pkt(struct sk_buff *skb,
return true;
}
-const struct nf_nat_protocol nf_nat_protocol_udp = {
- .protonum = IPPROTO_UDP,
+const struct nf_nat_l4proto nf_nat_l4proto_udp = {
+ .l4proto = IPPROTO_UDP,
.manip_pkt = udp_manip_pkt,
- .in_range = nf_nat_proto_in_range,
+ .in_range = nf_nat_l4proto_in_range,
.unique_tuple = udp_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
- .nlattr_to_range = nf_nat_proto_nlattr_to_range,
+ .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif
};
diff --git a/net/ipv4/netfilter/nf_nat_proto_udplite.c b/net/netfilter/nf_nat_proto_udplite.c
similarity index 58%
rename from net/ipv4/netfilter/nf_nat_proto_udplite.c
rename to net/netfilter/nf_nat_proto_udplite.c
index d24d10a..776a0d1 100644
--- a/net/ipv4/netfilter/nf_nat_proto_udplite.c
+++ b/net/netfilter/nf_nat_proto_udplite.c
@@ -9,59 +9,53 @@
#include <linux/types.h>
#include <linux/init.h>
-#include <linux/ip.h>
#include <linux/udp.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l3proto.h>
+#include <net/netfilter/nf_nat_l4proto.h>
-static u_int16_t udplite_port_rover;
+static u16 udplite_port_rover;
static void
-udplite_unique_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
+udplite_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
- nf_nat_proto_unique_tuple(tuple, range, maniptype, ct,
- &udplite_port_rover);
+ nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
+ &udplite_port_rover);
}
static bool
udplite_manip_pkt(struct sk_buff *skb,
- unsigned int iphdroff,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype)
{
- const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
struct udphdr *hdr;
- unsigned int hdroff = iphdroff + iph->ihl*4;
- __be32 oldip, newip;
__be16 *portptr, newport;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false;
- iph = (struct iphdr *)(skb->data + iphdroff);
hdr = (struct udphdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) {
- /* Get rid of src ip and src pt */
- oldip = iph->saddr;
- newip = tuple->src.u3.ip;
+ /* Get rid of source port */
newport = tuple->src.u.udp.port;
portptr = &hdr->source;
} else {
- /* Get rid of dst ip and dst pt */
- oldip = iph->daddr;
- newip = tuple->dst.u3.ip;
+ /* Get rid of dst port */
newport = tuple->dst.u.udp.port;
portptr = &hdr->dest;
}
- inet_proto_csum_replace4(&hdr->check, skb, oldip, newip, 1);
+ l3proto->csum_update(skb, iphdroff, &hdr->check, tuple, maniptype);
inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport, 0);
if (!hdr->check)
hdr->check = CSUM_MANGLED_0;
@@ -70,24 +64,38 @@ udplite_manip_pkt(struct sk_buff *skb,
return true;
}
-static const struct nf_nat_protocol nf_nat_protocol_udplite = {
- .protonum = IPPROTO_UDPLITE,
+static const struct nf_nat_l4proto nf_nat_l4proto_udplite = {
+ .l4proto = IPPROTO_UDPLITE,
.manip_pkt = udplite_manip_pkt,
- .in_range = nf_nat_proto_in_range,
+ .in_range = nf_nat_l4proto_in_range,
.unique_tuple = udplite_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
- .nlattr_to_range = nf_nat_proto_nlattr_to_range,
+ .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif
};
static int __init nf_nat_proto_udplite_init(void)
{
- return nf_nat_protocol_register(&nf_nat_protocol_udplite);
+ int err;
+
+ err = nf_nat_l4proto_register(NFPROTO_IPV4, &nf_nat_l4proto_udplite);
+ if (err < 0)
+ goto err1;
+ err = nf_nat_l4proto_register(NFPROTO_IPV6, &nf_nat_l4proto_udplite);
+ if (err < 0)
+ goto err2;
+ return 0;
+
+err2:
+ nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_udplite);
+err1:
+ return err;
}
static void __exit nf_nat_proto_udplite_fini(void)
{
- nf_nat_protocol_unregister(&nf_nat_protocol_udplite);
+ nf_nat_l4proto_unregister(NFPROTO_IPV6, &nf_nat_l4proto_udplite);
+ nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_udplite);
}
module_init(nf_nat_proto_udplite_init);
diff --git a/net/ipv4/netfilter/nf_nat_proto_unknown.c b/net/netfilter/nf_nat_proto_unknown.c
similarity index 76%
rename from net/ipv4/netfilter/nf_nat_proto_unknown.c
rename to net/netfilter/nf_nat_proto_unknown.c
index e0afe81..6e494d5 100644
--- a/net/ipv4/netfilter/nf_nat_proto_unknown.c
+++ b/net/netfilter/nf_nat_proto_unknown.c
@@ -15,8 +15,7 @@
#include <linux/netfilter.h>
#include <net/netfilter/nf_nat.h>
-#include <net/netfilter/nf_nat_rule.h>
-#include <net/netfilter/nf_nat_protocol.h>
+#include <net/netfilter/nf_nat_l4proto.h>
static bool unknown_in_range(const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type manip_type,
@@ -26,26 +25,29 @@ static bool unknown_in_range(const struct nf_conntrack_tuple *tuple,
return true;
}
-static void unknown_unique_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_nat_ipv4_range *range,
+static void unknown_unique_tuple(const struct nf_nat_l3proto *l3proto,
+ struct nf_conntrack_tuple *tuple,
+ const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct)
{
/* Sorry: we can't help you; if it's not unique, we can't frob
- anything. */
+ * anything.
+ */
return;
}
static bool
unknown_manip_pkt(struct sk_buff *skb,
- unsigned int iphdroff,
+ const struct nf_nat_l3proto *l3proto,
+ unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype)
{
return true;
}
-const struct nf_nat_protocol nf_nat_unknown_protocol = {
+const struct nf_nat_l4proto nf_nat_l4proto_unknown = {
.manip_pkt = unknown_manip_pkt,
.in_range = unknown_in_range,
.unique_tuple = unknown_unique_tuple,
diff --git a/net/netfilter/xt_nat.c b/net/netfilter/xt_nat.c
new file mode 100644
index 0000000..7521368
--- /dev/null
+++ b/net/netfilter/xt_nat.c
@@ -0,0 +1,167 @@
+/*
+ * (C) 1999-2001 Paul `Rusty' Russell
+ * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
+ * (C) 2011 Patrick McHardy <kaber@trash.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/x_tables.h>
+#include <net/netfilter/nf_nat_core.h>
+
+static int xt_nat_checkentry_v0(const struct xt_tgchk_param *par)
+{
+ const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
+
+ if (mr->rangesize != 1) {
+ pr_info("%s: multiple ranges no longer supported\n",
+ par->target->name);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void xt_nat_convert_range(struct nf_nat_range *dst,
+ const struct nf_nat_ipv4_range *src)
+{
+ memset(&dst->min_addr, 0, sizeof(dst->min_addr));
+ memset(&dst->max_addr, 0, sizeof(dst->max_addr));
+
+ dst->flags = src->flags;
+ dst->min_addr.ip = src->min_ip;
+ dst->max_addr.ip = src->max_ip;
+ dst->min_proto = src->min;
+ dst->max_proto = src->max;
+}
+
+static unsigned int
+xt_snat_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
+ struct nf_nat_range range;
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ NF_CT_ASSERT(ct != NULL &&
+ (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
+ ctinfo == IP_CT_RELATED_REPLY));
+
+ xt_nat_convert_range(&range, &mr->range[0]);
+ return nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
+}
+
+static unsigned int
+xt_dnat_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
+ struct nf_nat_range range;
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ NF_CT_ASSERT(ct != NULL &&
+ (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
+
+ xt_nat_convert_range(&range, &mr->range[0]);
+ return nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
+}
+
+static unsigned int
+xt_snat_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct nf_nat_range *range = par->targinfo;
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ NF_CT_ASSERT(ct != NULL &&
+ (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
+ ctinfo == IP_CT_RELATED_REPLY));
+
+ return nf_nat_setup_info(ct, range, NF_NAT_MANIP_SRC);
+}
+
+static unsigned int
+xt_dnat_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct nf_nat_range *range = par->targinfo;
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ NF_CT_ASSERT(ct != NULL &&
+ (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
+
+ return nf_nat_setup_info(ct, range, NF_NAT_MANIP_DST);
+}
+
+static struct xt_target xt_nat_target_reg[] __read_mostly = {
+ {
+ .name = "SNAT",
+ .revision = 0,
+ .checkentry = xt_nat_checkentry_v0,
+ .target = xt_snat_target_v0,
+ .targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
+ .family = NFPROTO_IPV4,
+ .table = "nat",
+ .hooks = (1 << NF_INET_POST_ROUTING) |
+ (1 << NF_INET_LOCAL_OUT),
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "DNAT",
+ .revision = 0,
+ .checkentry = xt_nat_checkentry_v0,
+ .target = xt_dnat_target_v0,
+ .targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
+ .family = NFPROTO_IPV4,
+ .table = "nat",
+ .hooks = (1 << NF_INET_PRE_ROUTING) |
+ (1 << NF_INET_LOCAL_IN),
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "SNAT",
+ .revision = 1,
+ .target = xt_snat_target_v1,
+ .targetsize = sizeof(struct nf_nat_range),
+ .table = "nat",
+ .hooks = (1 << NF_INET_POST_ROUTING) |
+ (1 << NF_INET_LOCAL_OUT),
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "DNAT",
+ .revision = 1,
+ .target = xt_dnat_target_v1,
+ .targetsize = sizeof(struct nf_nat_range),
+ .table = "nat",
+ .hooks = (1 << NF_INET_PRE_ROUTING) |
+ (1 << NF_INET_LOCAL_IN),
+ .me = THIS_MODULE,
+ },
+};
+
+static int __init xt_nat_init(void)
+{
+ return xt_register_targets(xt_nat_target_reg,
+ ARRAY_SIZE(xt_nat_target_reg));
+}
+
+static void __exit xt_nat_exit(void)
+{
+ xt_unregister_targets(xt_nat_target_reg, ARRAY_SIZE(xt_nat_target_reg));
+}
+
+module_init(xt_nat_init);
+module_exit(xt_nat_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_SNAT");
+MODULE_ALIAS("ipt_DNAT");
--
1.7.1
^ permalink raw reply related
* [PATCH 05/18] netfilter: nf_nat: add protoff argument to packet mangling functions
From: Patrick McHardy @ 2012-08-20 3:39 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
In-Reply-To: <1345434006-16549-1-git-send-email-kaber@trash.net>
For mangling IPv6 packets the protocol header offset needs to be known
by the NAT packet mangling functions. Add a so far unused protoff argument
and convert the conntrack and NAT helpers to use it in preparation of
IPv6 NAT.
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
include/linux/netfilter/nf_conntrack_amanda.h | 1 +
include/linux/netfilter/nf_conntrack_ftp.h | 1 +
include/linux/netfilter/nf_conntrack_h323.h | 15 ++-
include/linux/netfilter/nf_conntrack_irc.h | 1 +
include/linux/netfilter/nf_conntrack_pptp.h | 2 +
include/linux/netfilter/nf_conntrack_sip.h | 12 ++-
include/net/netfilter/nf_nat_helper.h | 11 +-
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 6 +-
net/ipv4/netfilter/nf_nat_amanda.c | 3 +-
net/ipv4/netfilter/nf_nat_ftp.c | 3 +-
net/ipv4/netfilter/nf_nat_h323.c | 48 ++++---
net/ipv4/netfilter/nf_nat_helper.c | 9 +-
net/ipv4/netfilter/nf_nat_irc.c | 3 +-
net/ipv4/netfilter/nf_nat_pptp.c | 6 +-
net/ipv4/netfilter/nf_nat_sip.c | 96 +++++++-----
net/netfilter/ipvs/ip_vs_ftp.c | 1 +
net/netfilter/nf_conntrack_amanda.c | 5 +-
net/netfilter/nf_conntrack_ftp.c | 3 +-
net/netfilter/nf_conntrack_h323_main.c | 191 +++++++++++++++---------
net/netfilter/nf_conntrack_irc.c | 3 +-
net/netfilter/nf_conntrack_pptp.c | 18 ++-
net/netfilter/nf_conntrack_sip.c | 95 +++++++-----
22 files changed, 328 insertions(+), 205 deletions(-)
diff --git a/include/linux/netfilter/nf_conntrack_amanda.h b/include/linux/netfilter/nf_conntrack_amanda.h
index 0bb5a69..4b59a15 100644
--- a/include/linux/netfilter/nf_conntrack_amanda.h
+++ b/include/linux/netfilter/nf_conntrack_amanda.h
@@ -4,6 +4,7 @@
extern unsigned int (*nf_nat_amanda_hook)(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int matchoff,
unsigned int matchlen,
struct nf_conntrack_expect *exp);
diff --git a/include/linux/netfilter/nf_conntrack_ftp.h b/include/linux/netfilter/nf_conntrack_ftp.h
index 3e3aa08..28f18df 100644
--- a/include/linux/netfilter/nf_conntrack_ftp.h
+++ b/include/linux/netfilter/nf_conntrack_ftp.h
@@ -34,6 +34,7 @@ struct nf_conntrack_expect;
extern unsigned int (*nf_nat_ftp_hook)(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
enum nf_ct_ftp_type type,
+ unsigned int protoff,
unsigned int matchoff,
unsigned int matchlen,
struct nf_conntrack_expect *exp);
diff --git a/include/linux/netfilter/nf_conntrack_h323.h b/include/linux/netfilter/nf_conntrack_h323.h
index 26f9226..f381020 100644
--- a/include/linux/netfilter/nf_conntrack_h323.h
+++ b/include/linux/netfilter/nf_conntrack_h323.h
@@ -36,12 +36,12 @@ extern void nf_conntrack_h245_expect(struct nf_conn *new,
struct nf_conntrack_expect *this);
extern void nf_conntrack_q931_expect(struct nf_conn *new,
struct nf_conntrack_expect *this);
-extern int (*set_h245_addr_hook) (struct sk_buff *skb,
+extern int (*set_h245_addr_hook) (struct sk_buff *skb, unsigned int protoff,
unsigned char **data, int dataoff,
H245_TransportAddress *taddr,
union nf_inet_addr *addr,
__be16 port);
-extern int (*set_h225_addr_hook) (struct sk_buff *skb,
+extern int (*set_h225_addr_hook) (struct sk_buff *skb, unsigned int protoff,
unsigned char **data, int dataoff,
TransportAddress *taddr,
union nf_inet_addr *addr,
@@ -49,40 +49,45 @@ extern int (*set_h225_addr_hook) (struct sk_buff *skb,
extern int (*set_sig_addr_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data,
+ unsigned int protoff, unsigned char **data,
TransportAddress *taddr, int count);
extern int (*set_ras_addr_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data,
+ unsigned int protoff, unsigned char **data,
TransportAddress *taddr, int count);
extern int (*nat_rtp_rtcp_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data, int dataoff,
+ unsigned int protoff, unsigned char **data,
+ int dataoff,
H245_TransportAddress *taddr,
__be16 port, __be16 rtp_port,
struct nf_conntrack_expect *rtp_exp,
struct nf_conntrack_expect *rtcp_exp);
extern int (*nat_t120_hook) (struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
H245_TransportAddress *taddr, __be16 port,
struct nf_conntrack_expect *exp);
extern int (*nat_h245_hook) (struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
TransportAddress *taddr, __be16 port,
struct nf_conntrack_expect *exp);
extern int (*nat_callforwarding_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
TransportAddress *taddr,
__be16 port,
struct nf_conntrack_expect *exp);
extern int (*nat_q931_hook) (struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, TransportAddress *taddr,
int idx, __be16 port,
struct nf_conntrack_expect *exp);
diff --git a/include/linux/netfilter/nf_conntrack_irc.h b/include/linux/netfilter/nf_conntrack_irc.h
index 36282bf..4bb9bae 100644
--- a/include/linux/netfilter/nf_conntrack_irc.h
+++ b/include/linux/netfilter/nf_conntrack_irc.h
@@ -7,6 +7,7 @@
extern unsigned int (*nf_nat_irc_hook)(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int matchoff,
unsigned int matchlen,
struct nf_conntrack_expect *exp);
diff --git a/include/linux/netfilter/nf_conntrack_pptp.h b/include/linux/netfilter/nf_conntrack_pptp.h
index 3bbde0c..2ab2830 100644
--- a/include/linux/netfilter/nf_conntrack_pptp.h
+++ b/include/linux/netfilter/nf_conntrack_pptp.h
@@ -303,12 +303,14 @@ struct nf_conntrack_expect;
extern int
(*nf_nat_pptp_hook_outbound)(struct sk_buff *skb,
struct nf_conn *ct, enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
struct PptpControlHeader *ctlh,
union pptp_ctrl_union *pptpReq);
extern int
(*nf_nat_pptp_hook_inbound)(struct sk_buff *skb,
struct nf_conn *ct, enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
struct PptpControlHeader *ctlh,
union pptp_ctrl_union *pptpReq);
diff --git a/include/linux/netfilter/nf_conntrack_sip.h b/include/linux/netfilter/nf_conntrack_sip.h
index 89f2a62..1afc669 100644
--- a/include/linux/netfilter/nf_conntrack_sip.h
+++ b/include/linux/netfilter/nf_conntrack_sip.h
@@ -37,10 +37,12 @@ struct sdp_media_type {
struct sip_handler {
const char *method;
unsigned int len;
- int (*request)(struct sk_buff *skb, unsigned int dataoff,
+ int (*request)(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int cseq);
- int (*response)(struct sk_buff *skb, unsigned int dataoff,
+ int (*response)(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int cseq, unsigned int code);
};
@@ -105,11 +107,13 @@ enum sdp_header_types {
};
extern unsigned int (*nf_nat_sip_hook)(struct sk_buff *skb,
+ unsigned int protoff,
unsigned int dataoff,
const char **dptr,
unsigned int *datalen);
extern void (*nf_nat_sip_seq_adjust_hook)(struct sk_buff *skb, s16 off);
extern unsigned int (*nf_nat_sip_expect_hook)(struct sk_buff *skb,
+ unsigned int protoff,
unsigned int dataoff,
const char **dptr,
unsigned int *datalen,
@@ -117,6 +121,7 @@ extern unsigned int (*nf_nat_sip_expect_hook)(struct sk_buff *skb,
unsigned int matchoff,
unsigned int matchlen);
extern unsigned int (*nf_nat_sdp_addr_hook)(struct sk_buff *skb,
+ unsigned int protoff,
unsigned int dataoff,
const char **dptr,
unsigned int *datalen,
@@ -125,6 +130,7 @@ extern unsigned int (*nf_nat_sdp_addr_hook)(struct sk_buff *skb,
enum sdp_header_types term,
const union nf_inet_addr *addr);
extern unsigned int (*nf_nat_sdp_port_hook)(struct sk_buff *skb,
+ unsigned int protoff,
unsigned int dataoff,
const char **dptr,
unsigned int *datalen,
@@ -132,12 +138,14 @@ extern unsigned int (*nf_nat_sdp_port_hook)(struct sk_buff *skb,
unsigned int matchlen,
u_int16_t port);
extern unsigned int (*nf_nat_sdp_session_hook)(struct sk_buff *skb,
+ unsigned int protoff,
unsigned int dataoff,
const char **dptr,
unsigned int *datalen,
unsigned int sdpoff,
const union nf_inet_addr *addr);
extern unsigned int (*nf_nat_sdp_media_hook)(struct sk_buff *skb,
+ unsigned int protoff,
unsigned int dataoff,
const char **dptr,
unsigned int *datalen,
diff --git a/include/net/netfilter/nf_nat_helper.h b/include/net/netfilter/nf_nat_helper.h
index 7d8fb7b..b4d6bfc 100644
--- a/include/net/netfilter/nf_nat_helper.h
+++ b/include/net/netfilter/nf_nat_helper.h
@@ -10,6 +10,7 @@ struct sk_buff;
extern int __nf_nat_mangle_tcp_packet(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int match_offset,
unsigned int match_len,
const char *rep_buffer,
@@ -18,12 +19,13 @@ extern int __nf_nat_mangle_tcp_packet(struct sk_buff *skb,
static inline int nf_nat_mangle_tcp_packet(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int match_offset,
unsigned int match_len,
const char *rep_buffer,
unsigned int rep_len)
{
- return __nf_nat_mangle_tcp_packet(skb, ct, ctinfo,
+ return __nf_nat_mangle_tcp_packet(skb, ct, ctinfo, protoff,
match_offset, match_len,
rep_buffer, rep_len, true);
}
@@ -31,6 +33,7 @@ static inline int nf_nat_mangle_tcp_packet(struct sk_buff *skb,
extern int nf_nat_mangle_udp_packet(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int match_offset,
unsigned int match_len,
const char *rep_buffer,
@@ -41,10 +44,12 @@ extern void nf_nat_set_seq_adjust(struct nf_conn *ct,
__be32 seq, s16 off);
extern int nf_nat_seq_adjust(struct sk_buff *skb,
struct nf_conn *ct,
- enum ip_conntrack_info ctinfo);
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff);
extern int (*nf_nat_seq_adjust_hook)(struct sk_buff *skb,
struct nf_conn *ct,
- enum ip_conntrack_info ctinfo);
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff);
/* Setup NAT on this expected conntrack so it follows master, but goes
* to port ct->master->saved_proto. */
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
index e7ff2dc..4ada329 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -31,7 +31,8 @@
int (*nf_nat_seq_adjust_hook)(struct sk_buff *skb,
struct nf_conn *ct,
- enum ip_conntrack_info ctinfo);
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff);
EXPORT_SYMBOL_GPL(nf_nat_seq_adjust_hook);
static bool ipv4_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
@@ -149,7 +150,8 @@ static unsigned int ipv4_confirm(unsigned int hooknum,
typeof(nf_nat_seq_adjust_hook) seq_adjust;
seq_adjust = rcu_dereference(nf_nat_seq_adjust_hook);
- if (!seq_adjust || !seq_adjust(skb, ct, ctinfo)) {
+ if (!seq_adjust ||
+ !seq_adjust(skb, ct, ctinfo, ip_hdrlen(skb))) {
NF_CT_STAT_INC_ATOMIC(nf_ct_net(ct), drop);
return NF_DROP;
}
diff --git a/net/ipv4/netfilter/nf_nat_amanda.c b/net/ipv4/netfilter/nf_nat_amanda.c
index 3c04d24..75464b6 100644
--- a/net/ipv4/netfilter/nf_nat_amanda.c
+++ b/net/ipv4/netfilter/nf_nat_amanda.c
@@ -26,6 +26,7 @@ MODULE_ALIAS("ip_nat_amanda");
static unsigned int help(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int matchoff,
unsigned int matchlen,
struct nf_conntrack_expect *exp)
@@ -61,7 +62,7 @@ static unsigned int help(struct sk_buff *skb,
sprintf(buffer, "%u", port);
ret = nf_nat_mangle_udp_packet(skb, exp->master, ctinfo,
- matchoff, matchlen,
+ protoff, matchoff, matchlen,
buffer, strlen(buffer));
if (ret != NF_ACCEPT)
nf_ct_unexpect_related(exp);
diff --git a/net/ipv4/netfilter/nf_nat_ftp.c b/net/ipv4/netfilter/nf_nat_ftp.c
index e462a95..5589f3a 100644
--- a/net/ipv4/netfilter/nf_nat_ftp.c
+++ b/net/ipv4/netfilter/nf_nat_ftp.c
@@ -55,6 +55,7 @@ static int nf_nat_ftp_fmt_cmd(enum nf_ct_ftp_type type,
static unsigned int nf_nat_ftp(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
enum nf_ct_ftp_type type,
+ unsigned int protoff,
unsigned int matchoff,
unsigned int matchlen,
struct nf_conntrack_expect *exp)
@@ -100,7 +101,7 @@ static unsigned int nf_nat_ftp(struct sk_buff *skb,
pr_debug("calling nf_nat_mangle_tcp_packet\n");
- if (!nf_nat_mangle_tcp_packet(skb, ct, ctinfo, matchoff,
+ if (!nf_nat_mangle_tcp_packet(skb, ct, ctinfo, protoff, matchoff,
matchlen, buffer, buflen))
goto out;
diff --git a/net/ipv4/netfilter/nf_nat_h323.c b/net/ipv4/netfilter/nf_nat_h323.c
index c6784a1..d2c228d 100644
--- a/net/ipv4/netfilter/nf_nat_h323.c
+++ b/net/ipv4/netfilter/nf_nat_h323.c
@@ -21,7 +21,7 @@
#include <linux/netfilter/nf_conntrack_h323.h>
/****************************************************************************/
-static int set_addr(struct sk_buff *skb,
+static int set_addr(struct sk_buff *skb, unsigned int protoff,
unsigned char **data, int dataoff,
unsigned int addroff, __be32 ip, __be16 port)
{
@@ -40,7 +40,7 @@ static int set_addr(struct sk_buff *skb,
if (ip_hdr(skb)->protocol == IPPROTO_TCP) {
if (!nf_nat_mangle_tcp_packet(skb, ct, ctinfo,
- addroff, sizeof(buf),
+ protoff, addroff, sizeof(buf),
(char *) &buf, sizeof(buf))) {
net_notice_ratelimited("nf_nat_h323: nf_nat_mangle_tcp_packet error\n");
return -1;
@@ -54,7 +54,7 @@ static int set_addr(struct sk_buff *skb,
*data = skb->data + ip_hdrlen(skb) + th->doff * 4 + dataoff;
} else {
if (!nf_nat_mangle_udp_packet(skb, ct, ctinfo,
- addroff, sizeof(buf),
+ protoff, addroff, sizeof(buf),
(char *) &buf, sizeof(buf))) {
net_notice_ratelimited("nf_nat_h323: nf_nat_mangle_udp_packet error\n");
return -1;
@@ -69,22 +69,22 @@ static int set_addr(struct sk_buff *skb,
}
/****************************************************************************/
-static int set_h225_addr(struct sk_buff *skb,
+static int set_h225_addr(struct sk_buff *skb, unsigned int protoff,
unsigned char **data, int dataoff,
TransportAddress *taddr,
union nf_inet_addr *addr, __be16 port)
{
- return set_addr(skb, data, dataoff, taddr->ipAddress.ip,
+ return set_addr(skb, protoff, data, dataoff, taddr->ipAddress.ip,
addr->ip, port);
}
/****************************************************************************/
-static int set_h245_addr(struct sk_buff *skb,
+static int set_h245_addr(struct sk_buff *skb, unsigned protoff,
unsigned char **data, int dataoff,
H245_TransportAddress *taddr,
union nf_inet_addr *addr, __be16 port)
{
- return set_addr(skb, data, dataoff,
+ return set_addr(skb, protoff, data, dataoff,
taddr->unicastAddress.iPAddress.network,
addr->ip, port);
}
@@ -92,7 +92,7 @@ static int set_h245_addr(struct sk_buff *skb,
/****************************************************************************/
static int set_sig_addr(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data,
+ unsigned int protoff, unsigned char **data,
TransportAddress *taddr, int count)
{
const struct nf_ct_h323_master *info = nfct_help_data(ct);
@@ -118,7 +118,8 @@ static int set_sig_addr(struct sk_buff *skb, struct nf_conn *ct,
&addr.ip, port,
&ct->tuplehash[!dir].tuple.dst.u3.ip,
info->sig_port[!dir]);
- return set_h225_addr(skb, data, 0, &taddr[i],
+ return set_h225_addr(skb, protoff, data, 0,
+ &taddr[i],
&ct->tuplehash[!dir].
tuple.dst.u3,
info->sig_port[!dir]);
@@ -129,7 +130,8 @@ static int set_sig_addr(struct sk_buff *skb, struct nf_conn *ct,
&addr.ip, port,
&ct->tuplehash[!dir].tuple.src.u3.ip,
info->sig_port[!dir]);
- return set_h225_addr(skb, data, 0, &taddr[i],
+ return set_h225_addr(skb, protoff, data, 0,
+ &taddr[i],
&ct->tuplehash[!dir].
tuple.src.u3,
info->sig_port[!dir]);
@@ -143,7 +145,7 @@ static int set_sig_addr(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int set_ras_addr(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data,
+ unsigned int protoff, unsigned char **data,
TransportAddress *taddr, int count)
{
int dir = CTINFO2DIR(ctinfo);
@@ -159,7 +161,7 @@ static int set_ras_addr(struct sk_buff *skb, struct nf_conn *ct,
&addr.ip, ntohs(port),
&ct->tuplehash[!dir].tuple.dst.u3.ip,
ntohs(ct->tuplehash[!dir].tuple.dst.u.udp.port));
- return set_h225_addr(skb, data, 0, &taddr[i],
+ return set_h225_addr(skb, protoff, data, 0, &taddr[i],
&ct->tuplehash[!dir].tuple.dst.u3,
ct->tuplehash[!dir].tuple.
dst.u.udp.port);
@@ -172,7 +174,7 @@ static int set_ras_addr(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int nat_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data, int dataoff,
+ unsigned int protoff, unsigned char **data, int dataoff,
H245_TransportAddress *taddr,
__be16 port, __be16 rtp_port,
struct nf_conntrack_expect *rtp_exp,
@@ -244,7 +246,7 @@ static int nat_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
}
/* Modify signal */
- if (set_h245_addr(skb, data, dataoff, taddr,
+ if (set_h245_addr(skb, protoff, data, dataoff, taddr,
&ct->tuplehash[!dir].tuple.dst.u3,
htons((port & htons(1)) ? nated_port + 1 :
nated_port)) == 0) {
@@ -275,7 +277,7 @@ static int nat_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int nat_t120(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data, int dataoff,
+ unsigned int protoff, unsigned char **data, int dataoff,
H245_TransportAddress *taddr, __be16 port,
struct nf_conntrack_expect *exp)
{
@@ -307,7 +309,7 @@ static int nat_t120(struct sk_buff *skb, struct nf_conn *ct,
}
/* Modify signal */
- if (set_h245_addr(skb, data, dataoff, taddr,
+ if (set_h245_addr(skb, protoff, data, dataoff, taddr,
&ct->tuplehash[!dir].tuple.dst.u3,
htons(nated_port)) < 0) {
nf_ct_unexpect_related(exp);
@@ -326,7 +328,7 @@ static int nat_t120(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int nat_h245(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data, int dataoff,
+ unsigned int protoff, unsigned char **data, int dataoff,
TransportAddress *taddr, __be16 port,
struct nf_conntrack_expect *exp)
{
@@ -363,7 +365,7 @@ static int nat_h245(struct sk_buff *skb, struct nf_conn *ct,
}
/* Modify signal */
- if (set_h225_addr(skb, data, dataoff, taddr,
+ if (set_h225_addr(skb, protoff, data, dataoff, taddr,
&ct->tuplehash[!dir].tuple.dst.u3,
htons(nated_port)) == 0) {
/* Save ports */
@@ -416,7 +418,8 @@ static void ip_nat_q931_expect(struct nf_conn *new,
/****************************************************************************/
static int nat_q931(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data, TransportAddress *taddr, int idx,
+ unsigned int protoff, unsigned char **data,
+ TransportAddress *taddr, int idx,
__be16 port, struct nf_conntrack_expect *exp)
{
struct nf_ct_h323_master *info = nfct_help_data(ct);
@@ -453,7 +456,7 @@ static int nat_q931(struct sk_buff *skb, struct nf_conn *ct,
}
/* Modify signal */
- if (set_h225_addr(skb, data, 0, &taddr[idx],
+ if (set_h225_addr(skb, protoff, data, 0, &taddr[idx],
&ct->tuplehash[!dir].tuple.dst.u3,
htons(nated_port)) == 0) {
/* Save ports */
@@ -464,7 +467,7 @@ static int nat_q931(struct sk_buff *skb, struct nf_conn *ct,
if (idx > 0 &&
get_h225_addr(ct, *data, &taddr[0], &addr, &port) &&
(ntohl(addr.ip) & 0xff000000) == 0x7f000000) {
- set_h225_addr(skb, data, 0, &taddr[0],
+ set_h225_addr(skb, protoff, data, 0, &taddr[0],
&ct->tuplehash[!dir].tuple.dst.u3,
info->sig_port[!dir]);
}
@@ -507,6 +510,7 @@ static void ip_nat_callforwarding_expect(struct nf_conn *new,
/****************************************************************************/
static int nat_callforwarding(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
TransportAddress *taddr, __be16 port,
struct nf_conntrack_expect *exp)
@@ -541,7 +545,7 @@ static int nat_callforwarding(struct sk_buff *skb, struct nf_conn *ct,
}
/* Modify signal */
- if (!set_h225_addr(skb, data, dataoff, taddr,
+ if (!set_h225_addr(skb, protoff, data, dataoff, taddr,
&ct->tuplehash[!dir].tuple.dst.u3,
htons(nated_port)) == 0) {
nf_ct_unexpect_related(exp);
diff --git a/net/ipv4/netfilter/nf_nat_helper.c b/net/ipv4/netfilter/nf_nat_helper.c
index 2e59ad0..2fefec5 100644
--- a/net/ipv4/netfilter/nf_nat_helper.c
+++ b/net/ipv4/netfilter/nf_nat_helper.c
@@ -206,6 +206,7 @@ static void nf_nat_csum(struct sk_buff *skb, const struct iphdr *iph, void *data
int __nf_nat_mangle_tcp_packet(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int match_offset,
unsigned int match_len,
const char *rep_buffer,
@@ -257,6 +258,7 @@ int
nf_nat_mangle_udp_packet(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int match_offset,
unsigned int match_len,
const char *rep_buffer,
@@ -387,7 +389,8 @@ nf_nat_sack_adjust(struct sk_buff *skb,
int
nf_nat_seq_adjust(struct sk_buff *skb,
struct nf_conn *ct,
- enum ip_conntrack_info ctinfo)
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff)
{
struct tcphdr *tcph;
int dir;
@@ -401,10 +404,10 @@ nf_nat_seq_adjust(struct sk_buff *skb,
this_way = &nat->seq[dir];
other_way = &nat->seq[!dir];
- if (!skb_make_writable(skb, ip_hdrlen(skb) + sizeof(*tcph)))
+ if (!skb_make_writable(skb, protoff + sizeof(*tcph)))
return 0;
- tcph = (void *)skb->data + ip_hdrlen(skb);
+ tcph = (void *)skb->data + protoff;
if (after(ntohl(tcph->seq), this_way->correction_pos))
seqoff = this_way->offset_after;
else
diff --git a/net/ipv4/netfilter/nf_nat_irc.c b/net/ipv4/netfilter/nf_nat_irc.c
index 979ae16..5b0c20a 100644
--- a/net/ipv4/netfilter/nf_nat_irc.c
+++ b/net/ipv4/netfilter/nf_nat_irc.c
@@ -29,6 +29,7 @@ MODULE_ALIAS("ip_nat_irc");
static unsigned int help(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int matchoff,
unsigned int matchlen,
struct nf_conntrack_expect *exp)
@@ -66,7 +67,7 @@ static unsigned int help(struct sk_buff *skb,
buffer, &ip, port);
ret = nf_nat_mangle_tcp_packet(skb, exp->master, ctinfo,
- matchoff, matchlen, buffer,
+ protoff, matchoff, matchlen, buffer,
strlen(buffer));
if (ret != NF_ACCEPT)
nf_ct_unexpect_related(exp);
diff --git a/net/ipv4/netfilter/nf_nat_pptp.c b/net/ipv4/netfilter/nf_nat_pptp.c
index 3881408..31ef890 100644
--- a/net/ipv4/netfilter/nf_nat_pptp.c
+++ b/net/ipv4/netfilter/nf_nat_pptp.c
@@ -113,6 +113,7 @@ static int
pptp_outbound_pkt(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
struct PptpControlHeader *ctlh,
union pptp_ctrl_union *pptpReq)
@@ -175,7 +176,7 @@ pptp_outbound_pkt(struct sk_buff *skb,
ntohs(REQ_CID(pptpReq, cid_off)), ntohs(new_callid));
/* mangle packet */
- if (nf_nat_mangle_tcp_packet(skb, ct, ctinfo,
+ if (nf_nat_mangle_tcp_packet(skb, ct, ctinfo, protoff,
cid_off + sizeof(struct pptp_pkt_hdr) +
sizeof(struct PptpControlHeader),
sizeof(new_callid), (char *)&new_callid,
@@ -216,6 +217,7 @@ static int
pptp_inbound_pkt(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
struct PptpControlHeader *ctlh,
union pptp_ctrl_union *pptpReq)
{
@@ -268,7 +270,7 @@ pptp_inbound_pkt(struct sk_buff *skb,
pr_debug("altering peer call id from 0x%04x to 0x%04x\n",
ntohs(REQ_CID(pptpReq, pcid_off)), ntohs(new_pcid));
- if (nf_nat_mangle_tcp_packet(skb, ct, ctinfo,
+ if (nf_nat_mangle_tcp_packet(skb, ct, ctinfo, protoff,
pcid_off + sizeof(struct pptp_pkt_hdr) +
sizeof(struct PptpControlHeader),
sizeof(new_pcid), (char *)&new_pcid,
diff --git a/net/ipv4/netfilter/nf_nat_sip.c b/net/ipv4/netfilter/nf_nat_sip.c
index 4ad9cf1..df626af 100644
--- a/net/ipv4/netfilter/nf_nat_sip.c
+++ b/net/ipv4/netfilter/nf_nat_sip.c
@@ -30,7 +30,8 @@ MODULE_DESCRIPTION("SIP NAT helper");
MODULE_ALIAS("ip_nat_sip");
-static unsigned int mangle_packet(struct sk_buff *skb, unsigned int dataoff,
+static unsigned int mangle_packet(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int matchoff, unsigned int matchlen,
const char *buffer, unsigned int buflen)
@@ -46,7 +47,7 @@ static unsigned int mangle_packet(struct sk_buff *skb, unsigned int dataoff,
matchoff += dataoff - baseoff;
if (!__nf_nat_mangle_tcp_packet(skb, ct, ctinfo,
- matchoff, matchlen,
+ protoff, matchoff, matchlen,
buffer, buflen, false))
return 0;
} else {
@@ -54,7 +55,7 @@ static unsigned int mangle_packet(struct sk_buff *skb, unsigned int dataoff,
matchoff += dataoff - baseoff;
if (!nf_nat_mangle_udp_packet(skb, ct, ctinfo,
- matchoff, matchlen,
+ protoff, matchoff, matchlen,
buffer, buflen))
return 0;
}
@@ -65,7 +66,8 @@ static unsigned int mangle_packet(struct sk_buff *skb, unsigned int dataoff,
return 1;
}
-static int map_addr(struct sk_buff *skb, unsigned int dataoff,
+static int map_addr(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int matchoff, unsigned int matchlen,
union nf_inet_addr *addr, __be16 port)
@@ -94,11 +96,12 @@ static int map_addr(struct sk_buff *skb, unsigned int dataoff,
buflen = sprintf(buffer, "%pI4:%u", &newaddr, ntohs(newport));
- return mangle_packet(skb, dataoff, dptr, datalen, matchoff, matchlen,
- buffer, buflen);
+ return mangle_packet(skb, protoff, dataoff, dptr, datalen,
+ matchoff, matchlen, buffer, buflen);
}
-static int map_sip_addr(struct sk_buff *skb, unsigned int dataoff,
+static int map_sip_addr(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
enum sip_header_types type)
{
@@ -111,11 +114,12 @@ static int map_sip_addr(struct sk_buff *skb, unsigned int dataoff,
if (ct_sip_parse_header_uri(ct, *dptr, NULL, *datalen, type, NULL,
&matchoff, &matchlen, &addr, &port) <= 0)
return 1;
- return map_addr(skb, dataoff, dptr, datalen, matchoff, matchlen,
- &addr, port);
+ return map_addr(skb, protoff, dataoff, dptr, datalen,
+ matchoff, matchlen, &addr, port);
}
-static unsigned int ip_nat_sip(struct sk_buff *skb, unsigned int dataoff,
+static unsigned int ip_nat_sip(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen)
{
enum ip_conntrack_info ctinfo;
@@ -132,8 +136,8 @@ static unsigned int ip_nat_sip(struct sk_buff *skb, unsigned int dataoff,
if (ct_sip_parse_request(ct, *dptr, *datalen,
&matchoff, &matchlen,
&addr, &port) > 0 &&
- !map_addr(skb, dataoff, dptr, datalen, matchoff, matchlen,
- &addr, port))
+ !map_addr(skb, protoff, dataoff, dptr, datalen,
+ matchoff, matchlen, &addr, port))
return NF_DROP;
request = 1;
} else
@@ -164,8 +168,8 @@ static unsigned int ip_nat_sip(struct sk_buff *skb, unsigned int dataoff,
}
olen = *datalen;
- if (!map_addr(skb, dataoff, dptr, datalen, matchoff, matchlen,
- &addr, port))
+ if (!map_addr(skb, protoff, dataoff, dptr, datalen,
+ matchoff, matchlen, &addr, port))
return NF_DROP;
matchend = matchoff + matchlen + *datalen - olen;
@@ -179,7 +183,7 @@ static unsigned int ip_nat_sip(struct sk_buff *skb, unsigned int dataoff,
addr.ip != ct->tuplehash[!dir].tuple.dst.u3.ip) {
buflen = sprintf(buffer, "%pI4",
&ct->tuplehash[!dir].tuple.dst.u3.ip);
- if (!mangle_packet(skb, dataoff, dptr, datalen,
+ if (!mangle_packet(skb, protoff, dataoff, dptr, datalen,
poff, plen, buffer, buflen))
return NF_DROP;
}
@@ -193,7 +197,7 @@ static unsigned int ip_nat_sip(struct sk_buff *skb, unsigned int dataoff,
addr.ip != ct->tuplehash[!dir].tuple.src.u3.ip) {
buflen = sprintf(buffer, "%pI4",
&ct->tuplehash[!dir].tuple.src.u3.ip);
- if (!mangle_packet(skb, dataoff, dptr, datalen,
+ if (!mangle_packet(skb, protoff, dataoff, dptr, datalen,
poff, plen, buffer, buflen))
return NF_DROP;
}
@@ -207,7 +211,7 @@ static unsigned int ip_nat_sip(struct sk_buff *skb, unsigned int dataoff,
htons(n) != ct->tuplehash[!dir].tuple.src.u.udp.port) {
__be16 p = ct->tuplehash[!dir].tuple.src.u.udp.port;
buflen = sprintf(buffer, "%u", ntohs(p));
- if (!mangle_packet(skb, dataoff, dptr, datalen,
+ if (!mangle_packet(skb, protoff, dataoff, dptr, datalen,
poff, plen, buffer, buflen))
return NF_DROP;
}
@@ -221,13 +225,14 @@ next:
SIP_HDR_CONTACT, &in_header,
&matchoff, &matchlen,
&addr, &port) > 0) {
- if (!map_addr(skb, dataoff, dptr, datalen, matchoff, matchlen,
+ if (!map_addr(skb, protoff, dataoff, dptr, datalen,
+ matchoff, matchlen,
&addr, port))
return NF_DROP;
}
- if (!map_sip_addr(skb, dataoff, dptr, datalen, SIP_HDR_FROM) ||
- !map_sip_addr(skb, dataoff, dptr, datalen, SIP_HDR_TO))
+ if (!map_sip_addr(skb, protoff, dataoff, dptr, datalen, SIP_HDR_FROM) ||
+ !map_sip_addr(skb, protoff, dataoff, dptr, datalen, SIP_HDR_TO))
return NF_DROP;
return NF_ACCEPT;
@@ -272,7 +277,8 @@ static void ip_nat_sip_expected(struct nf_conn *ct,
}
}
-static unsigned int ip_nat_sip_expect(struct sk_buff *skb, unsigned int dataoff,
+static unsigned int ip_nat_sip_expect(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
struct nf_conntrack_expect *exp,
unsigned int matchoff,
@@ -326,7 +332,7 @@ static unsigned int ip_nat_sip_expect(struct sk_buff *skb, unsigned int dataoff,
if (exp->tuple.dst.u3.ip != exp->saved_ip ||
exp->tuple.dst.u.udp.port != exp->saved_proto.udp.port) {
buflen = sprintf(buffer, "%pI4:%u", &newip, port);
- if (!mangle_packet(skb, dataoff, dptr, datalen,
+ if (!mangle_packet(skb, protoff, dataoff, dptr, datalen,
matchoff, matchlen, buffer, buflen))
goto err;
}
@@ -337,7 +343,8 @@ err:
return NF_DROP;
}
-static int mangle_content_len(struct sk_buff *skb, unsigned int dataoff,
+static int mangle_content_len(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen)
{
enum ip_conntrack_info ctinfo;
@@ -359,11 +366,12 @@ static int mangle_content_len(struct sk_buff *skb, unsigned int dataoff,
return 0;
buflen = sprintf(buffer, "%u", c_len);
- return mangle_packet(skb, dataoff, dptr, datalen, matchoff, matchlen,
- buffer, buflen);
+ return mangle_packet(skb, protoff, dataoff, dptr, datalen,
+ matchoff, matchlen, buffer, buflen);
}
-static int mangle_sdp_packet(struct sk_buff *skb, unsigned int dataoff,
+static int mangle_sdp_packet(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int sdpoff,
enum sdp_header_types type,
@@ -377,11 +385,12 @@ static int mangle_sdp_packet(struct sk_buff *skb, unsigned int dataoff,
if (ct_sip_get_sdp_header(ct, *dptr, sdpoff, *datalen, type, term,
&matchoff, &matchlen) <= 0)
return -ENOENT;
- return mangle_packet(skb, dataoff, dptr, datalen, matchoff, matchlen,
- buffer, buflen) ? 0 : -EINVAL;
+ return mangle_packet(skb, protoff, dataoff, dptr, datalen,
+ matchoff, matchlen, buffer, buflen) ? 0 : -EINVAL;
}
-static unsigned int ip_nat_sdp_addr(struct sk_buff *skb, unsigned int dataoff,
+static unsigned int ip_nat_sdp_addr(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int sdpoff,
enum sdp_header_types type,
@@ -392,14 +401,15 @@ static unsigned int ip_nat_sdp_addr(struct sk_buff *skb, unsigned int dataoff,
unsigned int buflen;
buflen = sprintf(buffer, "%pI4", &addr->ip);
- if (mangle_sdp_packet(skb, dataoff, dptr, datalen, sdpoff, type, term,
- buffer, buflen))
+ if (mangle_sdp_packet(skb, protoff, dataoff, dptr, datalen,
+ sdpoff, type, term, buffer, buflen))
return 0;
- return mangle_content_len(skb, dataoff, dptr, datalen);
+ return mangle_content_len(skb, protoff, dataoff, dptr, datalen);
}
-static unsigned int ip_nat_sdp_port(struct sk_buff *skb, unsigned int dataoff,
+static unsigned int ip_nat_sdp_port(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int matchoff,
unsigned int matchlen,
@@ -409,14 +419,15 @@ static unsigned int ip_nat_sdp_port(struct sk_buff *skb, unsigned int dataoff,
unsigned int buflen;
buflen = sprintf(buffer, "%u", port);
- if (!mangle_packet(skb, dataoff, dptr, datalen, matchoff, matchlen,
- buffer, buflen))
+ if (!mangle_packet(skb, protoff, dataoff, dptr, datalen,
+ matchoff, matchlen, buffer, buflen))
return 0;
- return mangle_content_len(skb, dataoff, dptr, datalen);
+ return mangle_content_len(skb, protoff, dataoff, dptr, datalen);
}
-static unsigned int ip_nat_sdp_session(struct sk_buff *skb, unsigned int dataoff,
+static unsigned int ip_nat_sdp_session(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int sdpoff,
const union nf_inet_addr *addr)
@@ -426,12 +437,12 @@ static unsigned int ip_nat_sdp_session(struct sk_buff *skb, unsigned int dataoff
/* Mangle session description owner and contact addresses */
buflen = sprintf(buffer, "%pI4", &addr->ip);
- if (mangle_sdp_packet(skb, dataoff, dptr, datalen, sdpoff,
+ if (mangle_sdp_packet(skb, protoff, dataoff, dptr, datalen, sdpoff,
SDP_HDR_OWNER_IP4, SDP_HDR_MEDIA,
buffer, buflen))
return 0;
- switch (mangle_sdp_packet(skb, dataoff, dptr, datalen, sdpoff,
+ switch (mangle_sdp_packet(skb, protoff, dataoff, dptr, datalen, sdpoff,
SDP_HDR_CONNECTION_IP4, SDP_HDR_MEDIA,
buffer, buflen)) {
case 0:
@@ -448,12 +459,13 @@ static unsigned int ip_nat_sdp_session(struct sk_buff *skb, unsigned int dataoff
return 0;
}
- return mangle_content_len(skb, dataoff, dptr, datalen);
+ return mangle_content_len(skb, protoff, dataoff, dptr, datalen);
}
/* So, this packet has hit the connection tracking matching code.
Mangle it, and change the expectation to match the new version. */
-static unsigned int ip_nat_sdp_media(struct sk_buff *skb, unsigned int dataoff,
+static unsigned int ip_nat_sdp_media(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
struct nf_conntrack_expect *rtp_exp,
struct nf_conntrack_expect *rtcp_exp,
@@ -514,7 +526,7 @@ static unsigned int ip_nat_sdp_media(struct sk_buff *skb, unsigned int dataoff,
/* Update media port. */
if (rtp_exp->tuple.dst.u.udp.port != rtp_exp->saved_proto.udp.port &&
- !ip_nat_sdp_port(skb, dataoff, dptr, datalen,
+ !ip_nat_sdp_port(skb, protoff, dataoff, dptr, datalen,
mediaoff, medialen, port))
goto err2;
diff --git a/net/netfilter/ipvs/ip_vs_ftp.c b/net/netfilter/ipvs/ip_vs_ftp.c
index b20b29c..390c195 100644
--- a/net/netfilter/ipvs/ip_vs_ftp.c
+++ b/net/netfilter/ipvs/ip_vs_ftp.c
@@ -268,6 +268,7 @@ static int ip_vs_ftp_out(struct ip_vs_app *app, struct ip_vs_conn *cp,
* packet.
*/
ret = nf_nat_mangle_tcp_packet(skb, ct, ctinfo,
+ iph->ihl * 4,
start-data, end-start,
buf, buf_len);
if (ret) {
diff --git a/net/netfilter/nf_conntrack_amanda.c b/net/netfilter/nf_conntrack_amanda.c
index 184c0dc..e0212b5 100644
--- a/net/netfilter/nf_conntrack_amanda.c
+++ b/net/netfilter/nf_conntrack_amanda.c
@@ -40,6 +40,7 @@ MODULE_PARM_DESC(ts_algo, "textsearch algorithm to use (default kmp)");
unsigned int (*nf_nat_amanda_hook)(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int matchoff,
unsigned int matchlen,
struct nf_conntrack_expect *exp)
@@ -156,8 +157,8 @@ static int amanda_help(struct sk_buff *skb,
nf_nat_amanda = rcu_dereference(nf_nat_amanda_hook);
if (nf_nat_amanda && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK)
- ret = nf_nat_amanda(skb, ctinfo, off - dataoff,
- len, exp);
+ ret = nf_nat_amanda(skb, ctinfo, protoff,
+ off - dataoff, len, exp);
else if (nf_ct_expect_related(exp) != 0)
ret = NF_DROP;
nf_ct_expect_put(exp);
diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c
index 3e1587e..c0f4a5b 100644
--- a/net/netfilter/nf_conntrack_ftp.c
+++ b/net/netfilter/nf_conntrack_ftp.c
@@ -48,6 +48,7 @@ module_param(loose, bool, 0600);
unsigned int (*nf_nat_ftp_hook)(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
enum nf_ct_ftp_type type,
+ unsigned int protoff,
unsigned int matchoff,
unsigned int matchlen,
struct nf_conntrack_expect *exp);
@@ -490,7 +491,7 @@ static int help(struct sk_buff *skb,
if (nf_nat_ftp && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK)
ret = nf_nat_ftp(skb, ctinfo, search[dir][i].ftptype,
- matchoff, matchlen, exp);
+ protoff, matchoff, matchlen, exp);
else {
/* Can't expect this? Best to drop packet now. */
if (nf_ct_expect_related(exp) != 0)
diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c
index 517c5e3..1b30b0d 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -49,12 +49,12 @@ MODULE_PARM_DESC(callforward_filter, "only create call forwarding expectations "
"(determined by routing information)");
/* Hooks for NAT */
-int (*set_h245_addr_hook) (struct sk_buff *skb,
+int (*set_h245_addr_hook) (struct sk_buff *skb, unsigned int protoff,
unsigned char **data, int dataoff,
H245_TransportAddress *taddr,
union nf_inet_addr *addr, __be16 port)
__read_mostly;
-int (*set_h225_addr_hook) (struct sk_buff *skb,
+int (*set_h225_addr_hook) (struct sk_buff *skb, unsigned int protoff,
unsigned char **data, int dataoff,
TransportAddress *taddr,
union nf_inet_addr *addr, __be16 port)
@@ -62,16 +62,17 @@ int (*set_h225_addr_hook) (struct sk_buff *skb,
int (*set_sig_addr_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data,
+ unsigned int protoff, unsigned char **data,
TransportAddress *taddr, int count) __read_mostly;
int (*set_ras_addr_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data,
+ unsigned int protoff, unsigned char **data,
TransportAddress *taddr, int count) __read_mostly;
int (*nat_rtp_rtcp_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
H245_TransportAddress *taddr,
__be16 port, __be16 rtp_port,
@@ -80,24 +81,28 @@ int (*nat_rtp_rtcp_hook) (struct sk_buff *skb,
int (*nat_t120_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
H245_TransportAddress *taddr, __be16 port,
struct nf_conntrack_expect *exp) __read_mostly;
int (*nat_h245_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
TransportAddress *taddr, __be16 port,
struct nf_conntrack_expect *exp) __read_mostly;
int (*nat_callforwarding_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
TransportAddress *taddr, __be16 port,
struct nf_conntrack_expect *exp) __read_mostly;
int (*nat_q931_hook) (struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, TransportAddress *taddr, int idx,
__be16 port, struct nf_conntrack_expect *exp)
__read_mostly;
@@ -251,6 +256,7 @@ static int get_h245_addr(struct nf_conn *ct, const unsigned char *data,
/****************************************************************************/
static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
H245_TransportAddress *taddr)
{
@@ -298,7 +304,7 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* NAT needed */
- ret = nat_rtp_rtcp(skb, ct, ctinfo, data, dataoff,
+ ret = nat_rtp_rtcp(skb, ct, ctinfo, protoff, data, dataoff,
taddr, port, rtp_port, rtp_exp, rtcp_exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(rtp_exp) == 0) {
@@ -325,6 +331,7 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
static int expect_t120(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
H245_TransportAddress *taddr)
{
@@ -357,7 +364,7 @@ static int expect_t120(struct sk_buff *skb,
nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* NAT needed */
- ret = nat_t120(skb, ct, ctinfo, data, dataoff, taddr,
+ ret = nat_t120(skb, ct, ctinfo, protoff, data, dataoff, taddr,
port, exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(exp) == 0) {
@@ -376,6 +383,7 @@ static int expect_t120(struct sk_buff *skb,
static int process_h245_channel(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
H2250LogicalChannelParameters *channel)
{
@@ -383,7 +391,7 @@ static int process_h245_channel(struct sk_buff *skb,
if (channel->options & eH2250LogicalChannelParameters_mediaChannel) {
/* RTP */
- ret = expect_rtp_rtcp(skb, ct, ctinfo, data, dataoff,
+ ret = expect_rtp_rtcp(skb, ct, ctinfo, protoff, data, dataoff,
&channel->mediaChannel);
if (ret < 0)
return -1;
@@ -392,7 +400,7 @@ static int process_h245_channel(struct sk_buff *skb,
if (channel->
options & eH2250LogicalChannelParameters_mediaControlChannel) {
/* RTCP */
- ret = expect_rtp_rtcp(skb, ct, ctinfo, data, dataoff,
+ ret = expect_rtp_rtcp(skb, ct, ctinfo, protoff, data, dataoff,
&channel->mediaControlChannel);
if (ret < 0)
return -1;
@@ -404,6 +412,7 @@ static int process_h245_channel(struct sk_buff *skb,
/****************************************************************************/
static int process_olc(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
OpenLogicalChannel *olc)
{
@@ -414,7 +423,8 @@ static int process_olc(struct sk_buff *skb, struct nf_conn *ct,
if (olc->forwardLogicalChannelParameters.multiplexParameters.choice ==
eOpenLogicalChannel_forwardLogicalChannelParameters_multiplexParameters_h2250LogicalChannelParameters)
{
- ret = process_h245_channel(skb, ct, ctinfo, data, dataoff,
+ ret = process_h245_channel(skb, ct, ctinfo,
+ protoff, data, dataoff,
&olc->
forwardLogicalChannelParameters.
multiplexParameters.
@@ -432,7 +442,8 @@ static int process_olc(struct sk_buff *skb, struct nf_conn *ct,
eOpenLogicalChannel_reverseLogicalChannelParameters_multiplexParameters_h2250LogicalChannelParameters))
{
ret =
- process_h245_channel(skb, ct, ctinfo, data, dataoff,
+ process_h245_channel(skb, ct, ctinfo,
+ protoff, data, dataoff,
&olc->
reverseLogicalChannelParameters.
multiplexParameters.
@@ -450,7 +461,7 @@ static int process_olc(struct sk_buff *skb, struct nf_conn *ct,
t120.choice == eDataProtocolCapability_separateLANStack &&
olc->separateStack.networkAddress.choice ==
eNetworkAccessParameters_networkAddress_localAreaAddress) {
- ret = expect_t120(skb, ct, ctinfo, data, dataoff,
+ ret = expect_t120(skb, ct, ctinfo, protoff, data, dataoff,
&olc->separateStack.networkAddress.
localAreaAddress);
if (ret < 0)
@@ -463,7 +474,7 @@ static int process_olc(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_olca(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data, int dataoff,
+ unsigned int protoff, unsigned char **data, int dataoff,
OpenLogicalChannelAck *olca)
{
H2250LogicalChannelAckParameters *ack;
@@ -479,7 +490,8 @@ static int process_olca(struct sk_buff *skb, struct nf_conn *ct,
choice ==
eOpenLogicalChannelAck_reverseLogicalChannelParameters_multiplexParameters_h2250LogicalChannelParameters))
{
- ret = process_h245_channel(skb, ct, ctinfo, data, dataoff,
+ ret = process_h245_channel(skb, ct, ctinfo,
+ protoff, data, dataoff,
&olca->
reverseLogicalChannelParameters.
multiplexParameters.
@@ -498,7 +510,8 @@ static int process_olca(struct sk_buff *skb, struct nf_conn *ct,
if (ack->options &
eH2250LogicalChannelAckParameters_mediaChannel) {
/* RTP */
- ret = expect_rtp_rtcp(skb, ct, ctinfo, data, dataoff,
+ ret = expect_rtp_rtcp(skb, ct, ctinfo,
+ protoff, data, dataoff,
&ack->mediaChannel);
if (ret < 0)
return -1;
@@ -507,7 +520,8 @@ static int process_olca(struct sk_buff *skb, struct nf_conn *ct,
if (ack->options &
eH2250LogicalChannelAckParameters_mediaControlChannel) {
/* RTCP */
- ret = expect_rtp_rtcp(skb, ct, ctinfo, data, dataoff,
+ ret = expect_rtp_rtcp(skb, ct, ctinfo,
+ protoff, data, dataoff,
&ack->mediaControlChannel);
if (ret < 0)
return -1;
@@ -517,7 +531,7 @@ static int process_olca(struct sk_buff *skb, struct nf_conn *ct,
if ((olca->options & eOpenLogicalChannelAck_separateStack) &&
olca->separateStack.networkAddress.choice ==
eNetworkAccessParameters_networkAddress_localAreaAddress) {
- ret = expect_t120(skb, ct, ctinfo, data, dataoff,
+ ret = expect_t120(skb, ct, ctinfo, protoff, data, dataoff,
&olca->separateStack.networkAddress.
localAreaAddress);
if (ret < 0)
@@ -530,14 +544,15 @@ static int process_olca(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_h245(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data, int dataoff,
+ unsigned int protoff, unsigned char **data, int dataoff,
MultimediaSystemControlMessage *mscm)
{
switch (mscm->choice) {
case eMultimediaSystemControlMessage_request:
if (mscm->request.choice ==
eRequestMessage_openLogicalChannel) {
- return process_olc(skb, ct, ctinfo, data, dataoff,
+ return process_olc(skb, ct, ctinfo,
+ protoff, data, dataoff,
&mscm->request.openLogicalChannel);
}
pr_debug("nf_ct_h323: H.245 Request %d\n",
@@ -546,7 +561,8 @@ static int process_h245(struct sk_buff *skb, struct nf_conn *ct,
case eMultimediaSystemControlMessage_response:
if (mscm->response.choice ==
eResponseMessage_openLogicalChannelAck) {
- return process_olca(skb, ct, ctinfo, data, dataoff,
+ return process_olca(skb, ct, ctinfo,
+ protoff, data, dataoff,
&mscm->response.
openLogicalChannelAck);
}
@@ -597,7 +613,8 @@ static int h245_help(struct sk_buff *skb, unsigned int protoff,
}
/* Process H.245 signal */
- if (process_h245(skb, ct, ctinfo, &data, dataoff, &mscm) < 0)
+ if (process_h245(skb, ct, ctinfo, protoff,
+ &data, dataoff, &mscm) < 0)
goto drop;
}
@@ -661,7 +678,7 @@ int get_h225_addr(struct nf_conn *ct, unsigned char *data,
/****************************************************************************/
static int expect_h245(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data, int dataoff,
+ unsigned int protoff, unsigned char **data, int dataoff,
TransportAddress *taddr)
{
int dir = CTINFO2DIR(ctinfo);
@@ -693,7 +710,7 @@ static int expect_h245(struct sk_buff *skb, struct nf_conn *ct,
nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* NAT needed */
- ret = nat_h245(skb, ct, ctinfo, data, dataoff, taddr,
+ ret = nat_h245(skb, ct, ctinfo, protoff, data, dataoff, taddr,
port, exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(exp) == 0) {
@@ -779,6 +796,7 @@ static int callforward_do_filter(const union nf_inet_addr *src,
static int expect_callforwarding(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
TransportAddress *taddr)
{
@@ -817,7 +835,8 @@ static int expect_callforwarding(struct sk_buff *skb,
nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* Need NAT */
- ret = nat_callforwarding(skb, ct, ctinfo, data, dataoff,
+ ret = nat_callforwarding(skb, ct, ctinfo,
+ protoff, data, dataoff,
taddr, port, exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(exp) == 0) {
@@ -835,6 +854,7 @@ static int expect_callforwarding(struct sk_buff *skb,
/****************************************************************************/
static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
Setup_UUIE *setup)
{
@@ -848,7 +868,7 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_q931: Setup\n");
if (setup->options & eSetup_UUIE_h245Address) {
- ret = expect_h245(skb, ct, ctinfo, data, dataoff,
+ ret = expect_h245(skb, ct, ctinfo, protoff, data, dataoff,
&setup->h245Address);
if (ret < 0)
return -1;
@@ -864,7 +884,7 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_q931: set destCallSignalAddress %pI6:%hu->%pI6:%hu\n",
&addr, ntohs(port), &ct->tuplehash[!dir].tuple.src.u3,
ntohs(ct->tuplehash[!dir].tuple.src.u.tcp.port));
- ret = set_h225_addr(skb, data, dataoff,
+ ret = set_h225_addr(skb, protoff, data, dataoff,
&setup->destCallSignalAddress,
&ct->tuplehash[!dir].tuple.src.u3,
ct->tuplehash[!dir].tuple.src.u.tcp.port);
@@ -881,7 +901,7 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_q931: set sourceCallSignalAddress %pI6:%hu->%pI6:%hu\n",
&addr, ntohs(port), &ct->tuplehash[!dir].tuple.dst.u3,
ntohs(ct->tuplehash[!dir].tuple.dst.u.tcp.port));
- ret = set_h225_addr(skb, data, dataoff,
+ ret = set_h225_addr(skb, protoff, data, dataoff,
&setup->sourceCallSignalAddress,
&ct->tuplehash[!dir].tuple.dst.u3,
ct->tuplehash[!dir].tuple.dst.u.tcp.port);
@@ -891,7 +911,8 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
if (setup->options & eSetup_UUIE_fastStart) {
for (i = 0; i < setup->fastStart.count; i++) {
- ret = process_olc(skb, ct, ctinfo, data, dataoff,
+ ret = process_olc(skb, ct, ctinfo,
+ protoff, data, dataoff,
&setup->fastStart.item[i]);
if (ret < 0)
return -1;
@@ -905,6 +926,7 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
static int process_callproceeding(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
CallProceeding_UUIE *callproc)
{
@@ -914,7 +936,7 @@ static int process_callproceeding(struct sk_buff *skb,
pr_debug("nf_ct_q931: CallProceeding\n");
if (callproc->options & eCallProceeding_UUIE_h245Address) {
- ret = expect_h245(skb, ct, ctinfo, data, dataoff,
+ ret = expect_h245(skb, ct, ctinfo, protoff, data, dataoff,
&callproc->h245Address);
if (ret < 0)
return -1;
@@ -922,7 +944,8 @@ static int process_callproceeding(struct sk_buff *skb,
if (callproc->options & eCallProceeding_UUIE_fastStart) {
for (i = 0; i < callproc->fastStart.count; i++) {
- ret = process_olc(skb, ct, ctinfo, data, dataoff,
+ ret = process_olc(skb, ct, ctinfo,
+ protoff, data, dataoff,
&callproc->fastStart.item[i]);
if (ret < 0)
return -1;
@@ -935,6 +958,7 @@ static int process_callproceeding(struct sk_buff *skb,
/****************************************************************************/
static int process_connect(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
Connect_UUIE *connect)
{
@@ -944,7 +968,7 @@ static int process_connect(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_q931: Connect\n");
if (connect->options & eConnect_UUIE_h245Address) {
- ret = expect_h245(skb, ct, ctinfo, data, dataoff,
+ ret = expect_h245(skb, ct, ctinfo, protoff, data, dataoff,
&connect->h245Address);
if (ret < 0)
return -1;
@@ -952,7 +976,8 @@ static int process_connect(struct sk_buff *skb, struct nf_conn *ct,
if (connect->options & eConnect_UUIE_fastStart) {
for (i = 0; i < connect->fastStart.count; i++) {
- ret = process_olc(skb, ct, ctinfo, data, dataoff,
+ ret = process_olc(skb, ct, ctinfo,
+ protoff, data, dataoff,
&connect->fastStart.item[i]);
if (ret < 0)
return -1;
@@ -965,6 +990,7 @@ static int process_connect(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_alerting(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
Alerting_UUIE *alert)
{
@@ -974,7 +1000,7 @@ static int process_alerting(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_q931: Alerting\n");
if (alert->options & eAlerting_UUIE_h245Address) {
- ret = expect_h245(skb, ct, ctinfo, data, dataoff,
+ ret = expect_h245(skb, ct, ctinfo, protoff, data, dataoff,
&alert->h245Address);
if (ret < 0)
return -1;
@@ -982,7 +1008,8 @@ static int process_alerting(struct sk_buff *skb, struct nf_conn *ct,
if (alert->options & eAlerting_UUIE_fastStart) {
for (i = 0; i < alert->fastStart.count; i++) {
- ret = process_olc(skb, ct, ctinfo, data, dataoff,
+ ret = process_olc(skb, ct, ctinfo,
+ protoff, data, dataoff,
&alert->fastStart.item[i]);
if (ret < 0)
return -1;
@@ -995,6 +1022,7 @@ static int process_alerting(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_facility(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
Facility_UUIE *facility)
{
@@ -1005,15 +1033,15 @@ static int process_facility(struct sk_buff *skb, struct nf_conn *ct,
if (facility->reason.choice == eFacilityReason_callForwarded) {
if (facility->options & eFacility_UUIE_alternativeAddress)
- return expect_callforwarding(skb, ct, ctinfo, data,
- dataoff,
+ return expect_callforwarding(skb, ct, ctinfo,
+ protoff, data, dataoff,
&facility->
alternativeAddress);
return 0;
}
if (facility->options & eFacility_UUIE_h245Address) {
- ret = expect_h245(skb, ct, ctinfo, data, dataoff,
+ ret = expect_h245(skb, ct, ctinfo, protoff, data, dataoff,
&facility->h245Address);
if (ret < 0)
return -1;
@@ -1021,7 +1049,8 @@ static int process_facility(struct sk_buff *skb, struct nf_conn *ct,
if (facility->options & eFacility_UUIE_fastStart) {
for (i = 0; i < facility->fastStart.count; i++) {
- ret = process_olc(skb, ct, ctinfo, data, dataoff,
+ ret = process_olc(skb, ct, ctinfo,
+ protoff, data, dataoff,
&facility->fastStart.item[i]);
if (ret < 0)
return -1;
@@ -1034,6 +1063,7 @@ static int process_facility(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_progress(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, int dataoff,
Progress_UUIE *progress)
{
@@ -1043,7 +1073,7 @@ static int process_progress(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_q931: Progress\n");
if (progress->options & eProgress_UUIE_h245Address) {
- ret = expect_h245(skb, ct, ctinfo, data, dataoff,
+ ret = expect_h245(skb, ct, ctinfo, protoff, data, dataoff,
&progress->h245Address);
if (ret < 0)
return -1;
@@ -1051,7 +1081,8 @@ static int process_progress(struct sk_buff *skb, struct nf_conn *ct,
if (progress->options & eProgress_UUIE_fastStart) {
for (i = 0; i < progress->fastStart.count; i++) {
- ret = process_olc(skb, ct, ctinfo, data, dataoff,
+ ret = process_olc(skb, ct, ctinfo,
+ protoff, data, dataoff,
&progress->fastStart.item[i]);
if (ret < 0)
return -1;
@@ -1064,7 +1095,8 @@ static int process_progress(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_q931(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data, int dataoff, Q931 *q931)
+ unsigned int protoff, unsigned char **data, int dataoff,
+ Q931 *q931)
{
H323_UU_PDU *pdu = &q931->UUIE.h323_uu_pdu;
int i;
@@ -1072,28 +1104,29 @@ static int process_q931(struct sk_buff *skb, struct nf_conn *ct,
switch (pdu->h323_message_body.choice) {
case eH323_UU_PDU_h323_message_body_setup:
- ret = process_setup(skb, ct, ctinfo, data, dataoff,
+ ret = process_setup(skb, ct, ctinfo, protoff, data, dataoff,
&pdu->h323_message_body.setup);
break;
case eH323_UU_PDU_h323_message_body_callProceeding:
- ret = process_callproceeding(skb, ct, ctinfo, data, dataoff,
+ ret = process_callproceeding(skb, ct, ctinfo,
+ protoff, data, dataoff,
&pdu->h323_message_body.
callProceeding);
break;
case eH323_UU_PDU_h323_message_body_connect:
- ret = process_connect(skb, ct, ctinfo, data, dataoff,
+ ret = process_connect(skb, ct, ctinfo, protoff, data, dataoff,
&pdu->h323_message_body.connect);
break;
case eH323_UU_PDU_h323_message_body_alerting:
- ret = process_alerting(skb, ct, ctinfo, data, dataoff,
+ ret = process_alerting(skb, ct, ctinfo, protoff, data, dataoff,
&pdu->h323_message_body.alerting);
break;
case eH323_UU_PDU_h323_message_body_facility:
- ret = process_facility(skb, ct, ctinfo, data, dataoff,
+ ret = process_facility(skb, ct, ctinfo, protoff, data, dataoff,
&pdu->h323_message_body.facility);
break;
case eH323_UU_PDU_h323_message_body_progress:
- ret = process_progress(skb, ct, ctinfo, data, dataoff,
+ ret = process_progress(skb, ct, ctinfo, protoff, data, dataoff,
&pdu->h323_message_body.progress);
break;
default:
@@ -1107,7 +1140,8 @@ static int process_q931(struct sk_buff *skb, struct nf_conn *ct,
if (pdu->options & eH323_UU_PDU_h245Control) {
for (i = 0; i < pdu->h245Control.count; i++) {
- ret = process_h245(skb, ct, ctinfo, data, dataoff,
+ ret = process_h245(skb, ct, ctinfo,
+ protoff, data, dataoff,
&pdu->h245Control.item[i]);
if (ret < 0)
return -1;
@@ -1152,7 +1186,8 @@ static int q931_help(struct sk_buff *skb, unsigned int protoff,
}
/* Process Q.931 signal */
- if (process_q931(skb, ct, ctinfo, &data, dataoff, &q931) < 0)
+ if (process_q931(skb, ct, ctinfo, protoff,
+ &data, dataoff, &q931) < 0)
goto drop;
}
@@ -1249,7 +1284,7 @@ static int set_expect_timeout(struct nf_conntrack_expect *exp,
/****************************************************************************/
static int expect_q931(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
- unsigned char **data,
+ unsigned int protoff, unsigned char **data,
TransportAddress *taddr, int count)
{
struct nf_ct_h323_master *info = nfct_help_data(ct);
@@ -1286,7 +1321,8 @@ static int expect_q931(struct sk_buff *skb, struct nf_conn *ct,
nat_q931 = rcu_dereference(nat_q931_hook);
if (nat_q931 && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) { /* Need NAT */
- ret = nat_q931(skb, ct, ctinfo, data, taddr, i, port, exp);
+ ret = nat_q931(skb, ct, ctinfo, protoff, data,
+ taddr, i, port, exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(exp) == 0) {
pr_debug("nf_ct_ras: expect Q.931 ");
@@ -1306,6 +1342,7 @@ static int expect_q931(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_grq(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, GatekeeperRequest *grq)
{
typeof(set_ras_addr_hook) set_ras_addr;
@@ -1315,7 +1352,7 @@ static int process_grq(struct sk_buff *skb, struct nf_conn *ct,
set_ras_addr = rcu_dereference(set_ras_addr_hook);
if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) /* NATed */
- return set_ras_addr(skb, ct, ctinfo, data,
+ return set_ras_addr(skb, ct, ctinfo, protoff, data,
&grq->rasAddress, 1);
return 0;
}
@@ -1323,6 +1360,7 @@ static int process_grq(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_gcf(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, GatekeeperConfirm *gcf)
{
int dir = CTINFO2DIR(ctinfo);
@@ -1367,6 +1405,7 @@ static int process_gcf(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_rrq(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, RegistrationRequest *rrq)
{
struct nf_ct_h323_master *info = nfct_help_data(ct);
@@ -1375,7 +1414,7 @@ static int process_rrq(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_ras: RRQ\n");
- ret = expect_q931(skb, ct, ctinfo, data,
+ ret = expect_q931(skb, ct, ctinfo, protoff, data,
rrq->callSignalAddress.item,
rrq->callSignalAddress.count);
if (ret < 0)
@@ -1384,7 +1423,7 @@ static int process_rrq(struct sk_buff *skb, struct nf_conn *ct,
set_ras_addr = rcu_dereference(set_ras_addr_hook);
if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
- ret = set_ras_addr(skb, ct, ctinfo, data,
+ ret = set_ras_addr(skb, ct, ctinfo, protoff, data,
rrq->rasAddress.item,
rrq->rasAddress.count);
if (ret < 0)
@@ -1403,6 +1442,7 @@ static int process_rrq(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_rcf(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, RegistrationConfirm *rcf)
{
struct nf_ct_h323_master *info = nfct_help_data(ct);
@@ -1416,7 +1456,7 @@ static int process_rcf(struct sk_buff *skb, struct nf_conn *ct,
set_sig_addr = rcu_dereference(set_sig_addr_hook);
if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
- ret = set_sig_addr(skb, ct, ctinfo, data,
+ ret = set_sig_addr(skb, ct, ctinfo, protoff, data,
rcf->callSignalAddress.item,
rcf->callSignalAddress.count);
if (ret < 0)
@@ -1453,6 +1493,7 @@ static int process_rcf(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_urq(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, UnregistrationRequest *urq)
{
struct nf_ct_h323_master *info = nfct_help_data(ct);
@@ -1465,7 +1506,7 @@ static int process_urq(struct sk_buff *skb, struct nf_conn *ct,
set_sig_addr = rcu_dereference(set_sig_addr_hook);
if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
- ret = set_sig_addr(skb, ct, ctinfo, data,
+ ret = set_sig_addr(skb, ct, ctinfo, protoff, data,
urq->callSignalAddress.item,
urq->callSignalAddress.count);
if (ret < 0)
@@ -1486,6 +1527,7 @@ static int process_urq(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_arq(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, AdmissionRequest *arq)
{
const struct nf_ct_h323_master *info = nfct_help_data(ct);
@@ -1505,7 +1547,7 @@ static int process_arq(struct sk_buff *skb, struct nf_conn *ct,
nf_ct_l3num(ct) == NFPROTO_IPV4 &&
set_h225_addr && ct->status & IPS_NAT_MASK) {
/* Answering ARQ */
- return set_h225_addr(skb, data, 0,
+ return set_h225_addr(skb, protoff, data, 0,
&arq->destCallSignalAddress,
&ct->tuplehash[!dir].tuple.dst.u3,
info->sig_port[!dir]);
@@ -1518,7 +1560,7 @@ static int process_arq(struct sk_buff *skb, struct nf_conn *ct,
set_h225_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* Calling ARQ */
- return set_h225_addr(skb, data, 0,
+ return set_h225_addr(skb, protoff, data, 0,
&arq->srcCallSignalAddress,
&ct->tuplehash[!dir].tuple.dst.u3,
port);
@@ -1530,6 +1572,7 @@ static int process_arq(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_acf(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, AdmissionConfirm *acf)
{
int dir = CTINFO2DIR(ctinfo);
@@ -1550,7 +1593,7 @@ static int process_acf(struct sk_buff *skb, struct nf_conn *ct,
set_sig_addr = rcu_dereference(set_sig_addr_hook);
if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK)
- return set_sig_addr(skb, ct, ctinfo, data,
+ return set_sig_addr(skb, ct, ctinfo, protoff, data,
&acf->destCallSignalAddress, 1);
return 0;
}
@@ -1578,6 +1621,7 @@ static int process_acf(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_lrq(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, LocationRequest *lrq)
{
typeof(set_ras_addr_hook) set_ras_addr;
@@ -1587,7 +1631,7 @@ static int process_lrq(struct sk_buff *skb, struct nf_conn *ct,
set_ras_addr = rcu_dereference(set_ras_addr_hook);
if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK)
- return set_ras_addr(skb, ct, ctinfo, data,
+ return set_ras_addr(skb, ct, ctinfo, protoff, data,
&lrq->replyAddress, 1);
return 0;
}
@@ -1595,6 +1639,7 @@ static int process_lrq(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_lcf(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, LocationConfirm *lcf)
{
int dir = CTINFO2DIR(ctinfo);
@@ -1634,6 +1679,7 @@ static int process_lcf(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_irr(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, InfoRequestResponse *irr)
{
int ret;
@@ -1645,7 +1691,7 @@ static int process_irr(struct sk_buff *skb, struct nf_conn *ct,
set_ras_addr = rcu_dereference(set_ras_addr_hook);
if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
- ret = set_ras_addr(skb, ct, ctinfo, data,
+ ret = set_ras_addr(skb, ct, ctinfo, protoff, data,
&irr->rasAddress, 1);
if (ret < 0)
return -1;
@@ -1654,7 +1700,7 @@ static int process_irr(struct sk_buff *skb, struct nf_conn *ct,
set_sig_addr = rcu_dereference(set_sig_addr_hook);
if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
- ret = set_sig_addr(skb, ct, ctinfo, data,
+ ret = set_sig_addr(skb, ct, ctinfo, protoff, data,
irr->callSignalAddress.item,
irr->callSignalAddress.count);
if (ret < 0)
@@ -1667,38 +1713,39 @@ static int process_irr(struct sk_buff *skb, struct nf_conn *ct,
/****************************************************************************/
static int process_ras(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned char **data, RasMessage *ras)
{
switch (ras->choice) {
case eRasMessage_gatekeeperRequest:
- return process_grq(skb, ct, ctinfo, data,
+ return process_grq(skb, ct, ctinfo, protoff, data,
&ras->gatekeeperRequest);
case eRasMessage_gatekeeperConfirm:
- return process_gcf(skb, ct, ctinfo, data,
+ return process_gcf(skb, ct, ctinfo, protoff, data,
&ras->gatekeeperConfirm);
case eRasMessage_registrationRequest:
- return process_rrq(skb, ct, ctinfo, data,
+ return process_rrq(skb, ct, ctinfo, protoff, data,
&ras->registrationRequest);
case eRasMessage_registrationConfirm:
- return process_rcf(skb, ct, ctinfo, data,
+ return process_rcf(skb, ct, ctinfo, protoff, data,
&ras->registrationConfirm);
case eRasMessage_unregistrationRequest:
- return process_urq(skb, ct, ctinfo, data,
+ return process_urq(skb, ct, ctinfo, protoff, data,
&ras->unregistrationRequest);
case eRasMessage_admissionRequest:
- return process_arq(skb, ct, ctinfo, data,
+ return process_arq(skb, ct, ctinfo, protoff, data,
&ras->admissionRequest);
case eRasMessage_admissionConfirm:
- return process_acf(skb, ct, ctinfo, data,
+ return process_acf(skb, ct, ctinfo, protoff, data,
&ras->admissionConfirm);
case eRasMessage_locationRequest:
- return process_lrq(skb, ct, ctinfo, data,
+ return process_lrq(skb, ct, ctinfo, protoff, data,
&ras->locationRequest);
case eRasMessage_locationConfirm:
- return process_lcf(skb, ct, ctinfo, data,
+ return process_lcf(skb, ct, ctinfo, protoff, data,
&ras->locationConfirm);
case eRasMessage_infoRequestResponse:
- return process_irr(skb, ct, ctinfo, data,
+ return process_irr(skb, ct, ctinfo, protoff, data,
&ras->infoRequestResponse);
default:
pr_debug("nf_ct_ras: RAS message %d\n", ras->choice);
@@ -1738,7 +1785,7 @@ static int ras_help(struct sk_buff *skb, unsigned int protoff,
}
/* Process RAS message */
- if (process_ras(skb, ct, ctinfo, &data, &ras) < 0)
+ if (process_ras(skb, ct, ctinfo, protoff, &data, &ras) < 0)
goto drop;
accept:
diff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c
index e06dc2f..95d097c 100644
--- a/net/netfilter/nf_conntrack_irc.c
+++ b/net/netfilter/nf_conntrack_irc.c
@@ -33,6 +33,7 @@ static DEFINE_SPINLOCK(irc_buffer_lock);
unsigned int (*nf_nat_irc_hook)(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
unsigned int matchoff,
unsigned int matchlen,
struct nf_conntrack_expect *exp) __read_mostly;
@@ -206,7 +207,7 @@ static int help(struct sk_buff *skb, unsigned int protoff,
nf_nat_irc = rcu_dereference(nf_nat_irc_hook);
if (nf_nat_irc && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK)
- ret = nf_nat_irc(skb, ctinfo,
+ ret = nf_nat_irc(skb, ctinfo, protoff,
addr_beg_p - ib_ptr,
addr_end_p - addr_beg_p,
exp);
diff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c
index 6fed9ec..cc7669e 100644
--- a/net/netfilter/nf_conntrack_pptp.c
+++ b/net/netfilter/nf_conntrack_pptp.c
@@ -45,14 +45,14 @@ static DEFINE_SPINLOCK(nf_pptp_lock);
int
(*nf_nat_pptp_hook_outbound)(struct sk_buff *skb,
struct nf_conn *ct, enum ip_conntrack_info ctinfo,
- struct PptpControlHeader *ctlh,
+ unsigned int protoff, struct PptpControlHeader *ctlh,
union pptp_ctrl_union *pptpReq) __read_mostly;
EXPORT_SYMBOL_GPL(nf_nat_pptp_hook_outbound);
int
(*nf_nat_pptp_hook_inbound)(struct sk_buff *skb,
struct nf_conn *ct, enum ip_conntrack_info ctinfo,
- struct PptpControlHeader *ctlh,
+ unsigned int protoff, struct PptpControlHeader *ctlh,
union pptp_ctrl_union *pptpReq) __read_mostly;
EXPORT_SYMBOL_GPL(nf_nat_pptp_hook_inbound);
@@ -262,7 +262,7 @@ out_unexpect_orig:
}
static inline int
-pptp_inbound_pkt(struct sk_buff *skb,
+pptp_inbound_pkt(struct sk_buff *skb, unsigned int protoff,
struct PptpControlHeader *ctlh,
union pptp_ctrl_union *pptpReq,
unsigned int reqlen,
@@ -376,7 +376,8 @@ pptp_inbound_pkt(struct sk_buff *skb,
nf_nat_pptp_inbound = rcu_dereference(nf_nat_pptp_hook_inbound);
if (nf_nat_pptp_inbound && ct->status & IPS_NAT_MASK)
- return nf_nat_pptp_inbound(skb, ct, ctinfo, ctlh, pptpReq);
+ return nf_nat_pptp_inbound(skb, ct, ctinfo,
+ protoff, ctlh, pptpReq);
return NF_ACCEPT;
invalid:
@@ -389,7 +390,7 @@ invalid:
}
static inline int
-pptp_outbound_pkt(struct sk_buff *skb,
+pptp_outbound_pkt(struct sk_buff *skb, unsigned int protoff,
struct PptpControlHeader *ctlh,
union pptp_ctrl_union *pptpReq,
unsigned int reqlen,
@@ -471,7 +472,8 @@ pptp_outbound_pkt(struct sk_buff *skb,
nf_nat_pptp_outbound = rcu_dereference(nf_nat_pptp_hook_outbound);
if (nf_nat_pptp_outbound && ct->status & IPS_NAT_MASK)
- return nf_nat_pptp_outbound(skb, ct, ctinfo, ctlh, pptpReq);
+ return nf_nat_pptp_outbound(skb, ct, ctinfo,
+ protoff, ctlh, pptpReq);
return NF_ACCEPT;
invalid:
@@ -570,11 +572,11 @@ conntrack_pptp_help(struct sk_buff *skb, unsigned int protoff,
* established from PNS->PAC. However, RFC makes no guarantee */
if (dir == IP_CT_DIR_ORIGINAL)
/* client -> server (PNS -> PAC) */
- ret = pptp_outbound_pkt(skb, ctlh, pptpReq, reqlen, ct,
+ ret = pptp_outbound_pkt(skb, protoff, ctlh, pptpReq, reqlen, ct,
ctinfo);
else
/* server -> client (PAC -> PNS) */
- ret = pptp_inbound_pkt(skb, ctlh, pptpReq, reqlen, ct,
+ ret = pptp_inbound_pkt(skb, protoff, ctlh, pptpReq, reqlen, ct,
ctinfo);
pr_debug("sstate: %d->%d, cstate: %d->%d\n",
oldsstate, info->sstate, oldcstate, info->cstate);
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index d08e0ba..590f0ab 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -52,8 +52,8 @@ module_param(sip_direct_media, int, 0600);
MODULE_PARM_DESC(sip_direct_media, "Expect Media streams between signalling "
"endpoints only (default 1)");
-unsigned int (*nf_nat_sip_hook)(struct sk_buff *skb, unsigned int dataoff,
- const char **dptr,
+unsigned int (*nf_nat_sip_hook)(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff, const char **dptr,
unsigned int *datalen) __read_mostly;
EXPORT_SYMBOL_GPL(nf_nat_sip_hook);
@@ -61,6 +61,7 @@ void (*nf_nat_sip_seq_adjust_hook)(struct sk_buff *skb, s16 off) __read_mostly;
EXPORT_SYMBOL_GPL(nf_nat_sip_seq_adjust_hook);
unsigned int (*nf_nat_sip_expect_hook)(struct sk_buff *skb,
+ unsigned int protoff,
unsigned int dataoff,
const char **dptr,
unsigned int *datalen,
@@ -69,7 +70,8 @@ unsigned int (*nf_nat_sip_expect_hook)(struct sk_buff *skb,
unsigned int matchlen) __read_mostly;
EXPORT_SYMBOL_GPL(nf_nat_sip_expect_hook);
-unsigned int (*nf_nat_sdp_addr_hook)(struct sk_buff *skb, unsigned int dataoff,
+unsigned int (*nf_nat_sdp_addr_hook)(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr,
unsigned int *datalen,
unsigned int sdpoff,
@@ -79,7 +81,8 @@ unsigned int (*nf_nat_sdp_addr_hook)(struct sk_buff *skb, unsigned int dataoff,
__read_mostly;
EXPORT_SYMBOL_GPL(nf_nat_sdp_addr_hook);
-unsigned int (*nf_nat_sdp_port_hook)(struct sk_buff *skb, unsigned int dataoff,
+unsigned int (*nf_nat_sdp_port_hook)(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr,
unsigned int *datalen,
unsigned int matchoff,
@@ -88,6 +91,7 @@ unsigned int (*nf_nat_sdp_port_hook)(struct sk_buff *skb, unsigned int dataoff,
EXPORT_SYMBOL_GPL(nf_nat_sdp_port_hook);
unsigned int (*nf_nat_sdp_session_hook)(struct sk_buff *skb,
+ unsigned int protoff,
unsigned int dataoff,
const char **dptr,
unsigned int *datalen,
@@ -96,7 +100,8 @@ unsigned int (*nf_nat_sdp_session_hook)(struct sk_buff *skb,
__read_mostly;
EXPORT_SYMBOL_GPL(nf_nat_sdp_session_hook);
-unsigned int (*nf_nat_sdp_media_hook)(struct sk_buff *skb, unsigned int dataoff,
+unsigned int (*nf_nat_sdp_media_hook)(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr,
unsigned int *datalen,
struct nf_conntrack_expect *rtp_exp,
@@ -883,7 +888,8 @@ static void flush_expectations(struct nf_conn *ct, bool media)
spin_unlock_bh(&nf_conntrack_lock);
}
-static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int dataoff,
+static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
union nf_inet_addr *daddr, __be16 port,
enum sip_expectation_classes class,
@@ -960,7 +966,7 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int dataoff,
if (direct_rtp) {
nf_nat_sdp_port = rcu_dereference(nf_nat_sdp_port_hook);
if (nf_nat_sdp_port &&
- !nf_nat_sdp_port(skb, dataoff, dptr, datalen,
+ !nf_nat_sdp_port(skb, protoff, dataoff, dptr, datalen,
mediaoff, medialen, ntohs(rtp_port)))
goto err1;
}
@@ -983,7 +989,7 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int dataoff,
nf_nat_sdp_media = rcu_dereference(nf_nat_sdp_media_hook);
if (nf_nat_sdp_media && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK && !direct_rtp)
- ret = nf_nat_sdp_media(skb, dataoff, dptr, datalen,
+ ret = nf_nat_sdp_media(skb, protoff, dataoff, dptr, datalen,
rtp_exp, rtcp_exp,
mediaoff, medialen, daddr);
else {
@@ -1024,7 +1030,8 @@ static const struct sdp_media_type *sdp_media_type(const char *dptr,
return NULL;
}
-static int process_sdp(struct sk_buff *skb, unsigned int dataoff,
+static int process_sdp(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int cseq)
{
@@ -1098,7 +1105,8 @@ static int process_sdp(struct sk_buff *skb, unsigned int dataoff,
else
return NF_DROP;
- ret = set_expected_rtp_rtcp(skb, dataoff, dptr, datalen,
+ ret = set_expected_rtp_rtcp(skb, protoff, dataoff,
+ dptr, datalen,
&rtp_addr, htons(port), t->class,
mediaoff, medialen);
if (ret != NF_ACCEPT)
@@ -1107,7 +1115,8 @@ static int process_sdp(struct sk_buff *skb, unsigned int dataoff,
/* Update media connection address if present */
if (maddr_len && nf_nat_sdp_addr &&
nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) {
- ret = nf_nat_sdp_addr(skb, dataoff, dptr, datalen,
+ ret = nf_nat_sdp_addr(skb, protoff, dataoff,
+ dptr, datalen,
mediaoff, c_hdr, SDP_HDR_MEDIA,
&rtp_addr);
if (ret != NF_ACCEPT)
@@ -1120,12 +1129,13 @@ static int process_sdp(struct sk_buff *skb, unsigned int dataoff,
nf_nat_sdp_session = rcu_dereference(nf_nat_sdp_session_hook);
if (nf_nat_sdp_session && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK)
- ret = nf_nat_sdp_session(skb, dataoff, dptr, datalen, sdpoff,
- &rtp_addr);
+ ret = nf_nat_sdp_session(skb, protoff, dataoff,
+ dptr, datalen, sdpoff, &rtp_addr);
return ret;
}
-static int process_invite_response(struct sk_buff *skb, unsigned int dataoff,
+static int process_invite_response(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int cseq, unsigned int code)
{
@@ -1135,13 +1145,14 @@ static int process_invite_response(struct sk_buff *skb, unsigned int dataoff,
if ((code >= 100 && code <= 199) ||
(code >= 200 && code <= 299))
- return process_sdp(skb, dataoff, dptr, datalen, cseq);
+ return process_sdp(skb, protoff, dataoff, dptr, datalen, cseq);
else if (ct_sip_info->invite_cseq == cseq)
flush_expectations(ct, true);
return NF_ACCEPT;
}
-static int process_update_response(struct sk_buff *skb, unsigned int dataoff,
+static int process_update_response(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int cseq, unsigned int code)
{
@@ -1151,13 +1162,14 @@ static int process_update_response(struct sk_buff *skb, unsigned int dataoff,
if ((code >= 100 && code <= 199) ||
(code >= 200 && code <= 299))
- return process_sdp(skb, dataoff, dptr, datalen, cseq);
+ return process_sdp(skb, protoff, dataoff, dptr, datalen, cseq);
else if (ct_sip_info->invite_cseq == cseq)
flush_expectations(ct, true);
return NF_ACCEPT;
}
-static int process_prack_response(struct sk_buff *skb, unsigned int dataoff,
+static int process_prack_response(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int cseq, unsigned int code)
{
@@ -1167,13 +1179,14 @@ static int process_prack_response(struct sk_buff *skb, unsigned int dataoff,
if ((code >= 100 && code <= 199) ||
(code >= 200 && code <= 299))
- return process_sdp(skb, dataoff, dptr, datalen, cseq);
+ return process_sdp(skb, protoff, dataoff, dptr, datalen, cseq);
else if (ct_sip_info->invite_cseq == cseq)
flush_expectations(ct, true);
return NF_ACCEPT;
}
-static int process_invite_request(struct sk_buff *skb, unsigned int dataoff,
+static int process_invite_request(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int cseq)
{
@@ -1183,13 +1196,14 @@ static int process_invite_request(struct sk_buff *skb, unsigned int dataoff,
unsigned int ret;
flush_expectations(ct, true);
- ret = process_sdp(skb, dataoff, dptr, datalen, cseq);
+ ret = process_sdp(skb, protoff, dataoff, dptr, datalen, cseq);
if (ret == NF_ACCEPT)
ct_sip_info->invite_cseq = cseq;
return ret;
}
-static int process_bye_request(struct sk_buff *skb, unsigned int dataoff,
+static int process_bye_request(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int cseq)
{
@@ -1204,7 +1218,8 @@ static int process_bye_request(struct sk_buff *skb, unsigned int dataoff,
* signalling connections. The expectation is marked inactive and is activated
* when receiving a response indicating success from the registrar.
*/
-static int process_register_request(struct sk_buff *skb, unsigned int dataoff,
+static int process_register_request(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int cseq)
{
@@ -1280,8 +1295,8 @@ static int process_register_request(struct sk_buff *skb, unsigned int dataoff,
nf_nat_sip_expect = rcu_dereference(nf_nat_sip_expect_hook);
if (nf_nat_sip_expect && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK)
- ret = nf_nat_sip_expect(skb, dataoff, dptr, datalen, exp,
- matchoff, matchlen);
+ ret = nf_nat_sip_expect(skb, protoff, dataoff, dptr, datalen,
+ exp, matchoff, matchlen);
else {
if (nf_ct_expect_related(exp) != 0)
ret = NF_DROP;
@@ -1296,7 +1311,8 @@ store_cseq:
return ret;
}
-static int process_register_response(struct sk_buff *skb, unsigned int dataoff,
+static int process_register_response(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen,
unsigned int cseq, unsigned int code)
{
@@ -1378,7 +1394,8 @@ static const struct sip_handler sip_handlers[] = {
SIP_HANDLER("REGISTER", process_register_request, process_register_response),
};
-static int process_sip_response(struct sk_buff *skb, unsigned int dataoff,
+static int process_sip_response(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen)
{
enum ip_conntrack_info ctinfo;
@@ -1409,13 +1426,14 @@ static int process_sip_response(struct sk_buff *skb, unsigned int dataoff,
if (*datalen < matchend + handler->len ||
strnicmp(*dptr + matchend, handler->method, handler->len))
continue;
- return handler->response(skb, dataoff, dptr, datalen,
+ return handler->response(skb, protoff, dataoff, dptr, datalen,
cseq, code);
}
return NF_ACCEPT;
}
-static int process_sip_request(struct sk_buff *skb, unsigned int dataoff,
+static int process_sip_request(struct sk_buff *skb, unsigned int protoff,
+ unsigned int dataoff,
const char **dptr, unsigned int *datalen)
{
enum ip_conntrack_info ctinfo;
@@ -1440,27 +1458,29 @@ static int process_sip_request(struct sk_buff *skb, unsigned int dataoff,
if (!cseq)
return NF_DROP;
- return handler->request(skb, dataoff, dptr, datalen, cseq);
+ return handler->request(skb, protoff, dataoff, dptr, datalen,
+ cseq);
}
return NF_ACCEPT;
}
static int process_sip_msg(struct sk_buff *skb, struct nf_conn *ct,
- unsigned int dataoff, const char **dptr,
- unsigned int *datalen)
+ unsigned int protoff, unsigned int dataoff,
+ const char **dptr, unsigned int *datalen)
{
typeof(nf_nat_sip_hook) nf_nat_sip;
int ret;
if (strnicmp(*dptr, "SIP/2.0 ", strlen("SIP/2.0 ")) != 0)
- ret = process_sip_request(skb, dataoff, dptr, datalen);
+ ret = process_sip_request(skb, protoff, dataoff, dptr, datalen);
else
- ret = process_sip_response(skb, dataoff, dptr, datalen);
+ ret = process_sip_response(skb, protoff, dataoff, dptr, datalen);
if (ret == NF_ACCEPT && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
nf_nat_sip = rcu_dereference(nf_nat_sip_hook);
- if (nf_nat_sip && !nf_nat_sip(skb, dataoff, dptr, datalen))
+ if (nf_nat_sip && !nf_nat_sip(skb, protoff, dataoff,
+ dptr, datalen))
ret = NF_DROP;
}
@@ -1528,7 +1548,8 @@ static int sip_help_tcp(struct sk_buff *skb, unsigned int protoff,
if (msglen > datalen)
return NF_DROP;
- ret = process_sip_msg(skb, ct, dataoff, &dptr, &msglen);
+ ret = process_sip_msg(skb, ct, protoff, dataoff,
+ &dptr, &msglen);
if (ret != NF_ACCEPT)
break;
diff = msglen - origlen;
@@ -1570,7 +1591,7 @@ static int sip_help_udp(struct sk_buff *skb, unsigned int protoff,
if (datalen < strlen("SIP/2.0 200"))
return NF_ACCEPT;
- return process_sip_msg(skb, ct, dataoff, &dptr, &datalen);
+ return process_sip_msg(skb, ct, protoff, dataoff, &dptr, &datalen);
}
static struct nf_conntrack_helper sip[MAX_PORTS][4] __read_mostly;
--
1.7.1
^ permalink raw reply related
* [PATCH 04/18] netfilter: nf_conntrack: restrict NAT helper invocation to IPv4
From: Patrick McHardy @ 2012-08-20 3:39 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
In-Reply-To: <1345434006-16549-1-git-send-email-kaber@trash.net>
The NAT helpers currently only handle IPv4 packets correctly. Restrict
invocation of the helpers to IPv4 in preparation of IPv6 NAT.
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
net/netfilter/nf_conntrack_amanda.c | 3 +-
net/netfilter/nf_conntrack_ftp.c | 3 +-
net/netfilter/nf_conntrack_h323_main.c | 41 ++++++++++++++++++++++---------
net/netfilter/nf_conntrack_irc.c | 3 +-
net/netfilter/nf_conntrack_sip.c | 18 +++++++++----
net/netfilter/nf_conntrack_tftp.c | 3 +-
6 files changed, 49 insertions(+), 22 deletions(-)
diff --git a/net/netfilter/nf_conntrack_amanda.c b/net/netfilter/nf_conntrack_amanda.c
index f2de8c5..184c0dc 100644
--- a/net/netfilter/nf_conntrack_amanda.c
+++ b/net/netfilter/nf_conntrack_amanda.c
@@ -154,7 +154,8 @@ static int amanda_help(struct sk_buff *skb,
IPPROTO_TCP, NULL, &port);
nf_nat_amanda = rcu_dereference(nf_nat_amanda_hook);
- if (nf_nat_amanda && ct->status & IPS_NAT_MASK)
+ if (nf_nat_amanda && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK)
ret = nf_nat_amanda(skb, ctinfo, off - dataoff,
len, exp);
else if (nf_ct_expect_related(exp) != 0)
diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c
index 4bb771d..3e1587e 100644
--- a/net/netfilter/nf_conntrack_ftp.c
+++ b/net/netfilter/nf_conntrack_ftp.c
@@ -487,7 +487,8 @@ static int help(struct sk_buff *skb,
/* Now, NAT might want to mangle the packet, and register the
* (possibly changed) expectation itself. */
nf_nat_ftp = rcu_dereference(nf_nat_ftp_hook);
- if (nf_nat_ftp && ct->status & IPS_NAT_MASK)
+ if (nf_nat_ftp && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK)
ret = nf_nat_ftp(skb, ctinfo, search[dir][i].ftptype,
matchoff, matchlen, exp);
else {
diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c
index 4283b20..517c5e3 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -295,6 +295,7 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
&ct->tuplehash[!dir].tuple.dst.u3,
sizeof(ct->tuplehash[dir].tuple.src.u3)) &&
(nat_rtp_rtcp = rcu_dereference(nat_rtp_rtcp_hook)) &&
+ nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* NAT needed */
ret = nat_rtp_rtcp(skb, ct, ctinfo, data, dataoff,
@@ -353,6 +354,7 @@ static int expect_t120(struct sk_buff *skb,
&ct->tuplehash[!dir].tuple.dst.u3,
sizeof(ct->tuplehash[dir].tuple.src.u3)) &&
(nat_t120 = rcu_dereference(nat_t120_hook)) &&
+ nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* NAT needed */
ret = nat_t120(skb, ct, ctinfo, data, dataoff, taddr,
@@ -688,6 +690,7 @@ static int expect_h245(struct sk_buff *skb, struct nf_conn *ct,
&ct->tuplehash[!dir].tuple.dst.u3,
sizeof(ct->tuplehash[dir].tuple.src.u3)) &&
(nat_h245 = rcu_dereference(nat_h245_hook)) &&
+ nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* NAT needed */
ret = nat_h245(skb, ct, ctinfo, data, dataoff, taddr,
@@ -811,6 +814,7 @@ static int expect_callforwarding(struct sk_buff *skb,
&ct->tuplehash[!dir].tuple.dst.u3,
sizeof(ct->tuplehash[dir].tuple.src.u3)) &&
(nat_callforwarding = rcu_dereference(nat_callforwarding_hook)) &&
+ nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* Need NAT */
ret = nat_callforwarding(skb, ct, ctinfo, data, dataoff,
@@ -852,7 +856,8 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
set_h225_addr = rcu_dereference(set_h225_addr_hook);
if ((setup->options & eSetup_UUIE_destCallSignalAddress) &&
- (set_h225_addr) && ct->status & IPS_NAT_MASK &&
+ (set_h225_addr) && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK &&
get_h225_addr(ct, *data, &setup->destCallSignalAddress,
&addr, &port) &&
memcmp(&addr, &ct->tuplehash[!dir].tuple.src.u3, sizeof(addr))) {
@@ -868,7 +873,8 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
}
if ((setup->options & eSetup_UUIE_sourceCallSignalAddress) &&
- (set_h225_addr) && ct->status & IPS_NAT_MASK &&
+ (set_h225_addr) && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK &&
get_h225_addr(ct, *data, &setup->sourceCallSignalAddress,
&addr, &port) &&
memcmp(&addr, &ct->tuplehash[!dir].tuple.dst.u3, sizeof(addr))) {
@@ -1278,7 +1284,8 @@ static int expect_q931(struct sk_buff *skb, struct nf_conn *ct,
exp->flags = NF_CT_EXPECT_PERMANENT; /* Accept multiple calls */
nat_q931 = rcu_dereference(nat_q931_hook);
- if (nat_q931 && ct->status & IPS_NAT_MASK) { /* Need NAT */
+ if (nat_q931 && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK) { /* Need NAT */
ret = nat_q931(skb, ct, ctinfo, data, taddr, i, port, exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(exp) == 0) {
@@ -1306,7 +1313,8 @@ static int process_grq(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_ras: GRQ\n");
set_ras_addr = rcu_dereference(set_ras_addr_hook);
- if (set_ras_addr && ct->status & IPS_NAT_MASK) /* NATed */
+ if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK) /* NATed */
return set_ras_addr(skb, ct, ctinfo, data,
&grq->rasAddress, 1);
return 0;
@@ -1374,7 +1382,8 @@ static int process_rrq(struct sk_buff *skb, struct nf_conn *ct,
return -1;
set_ras_addr = rcu_dereference(set_ras_addr_hook);
- if (set_ras_addr && ct->status & IPS_NAT_MASK) {
+ if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK) {
ret = set_ras_addr(skb, ct, ctinfo, data,
rrq->rasAddress.item,
rrq->rasAddress.count);
@@ -1405,7 +1414,8 @@ static int process_rcf(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_ras: RCF\n");
set_sig_addr = rcu_dereference(set_sig_addr_hook);
- if (set_sig_addr && ct->status & IPS_NAT_MASK) {
+ if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK) {
ret = set_sig_addr(skb, ct, ctinfo, data,
rcf->callSignalAddress.item,
rcf->callSignalAddress.count);
@@ -1453,7 +1463,8 @@ static int process_urq(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_ras: URQ\n");
set_sig_addr = rcu_dereference(set_sig_addr_hook);
- if (set_sig_addr && ct->status & IPS_NAT_MASK) {
+ if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK) {
ret = set_sig_addr(skb, ct, ctinfo, data,
urq->callSignalAddress.item,
urq->callSignalAddress.count);
@@ -1491,6 +1502,7 @@ static int process_arq(struct sk_buff *skb, struct nf_conn *ct,
&addr, &port) &&
!memcmp(&addr, &ct->tuplehash[dir].tuple.src.u3, sizeof(addr)) &&
port == info->sig_port[dir] &&
+ nf_ct_l3num(ct) == NFPROTO_IPV4 &&
set_h225_addr && ct->status & IPS_NAT_MASK) {
/* Answering ARQ */
return set_h225_addr(skb, data, 0,
@@ -1503,7 +1515,8 @@ static int process_arq(struct sk_buff *skb, struct nf_conn *ct,
get_h225_addr(ct, *data, &arq->srcCallSignalAddress,
&addr, &port) &&
!memcmp(&addr, &ct->tuplehash[dir].tuple.src.u3, sizeof(addr)) &&
- set_h225_addr && ct->status & IPS_NAT_MASK) {
+ set_h225_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK) {
/* Calling ARQ */
return set_h225_addr(skb, data, 0,
&arq->srcCallSignalAddress,
@@ -1535,7 +1548,8 @@ static int process_acf(struct sk_buff *skb, struct nf_conn *ct,
if (!memcmp(&addr, &ct->tuplehash[dir].tuple.dst.u3, sizeof(addr))) {
/* Answering ACF */
set_sig_addr = rcu_dereference(set_sig_addr_hook);
- if (set_sig_addr && ct->status & IPS_NAT_MASK)
+ if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK)
return set_sig_addr(skb, ct, ctinfo, data,
&acf->destCallSignalAddress, 1);
return 0;
@@ -1571,7 +1585,8 @@ static int process_lrq(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_ras: LRQ\n");
set_ras_addr = rcu_dereference(set_ras_addr_hook);
- if (set_ras_addr && ct->status & IPS_NAT_MASK)
+ if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK)
return set_ras_addr(skb, ct, ctinfo, data,
&lrq->replyAddress, 1);
return 0;
@@ -1628,7 +1643,8 @@ static int process_irr(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_ras: IRR\n");
set_ras_addr = rcu_dereference(set_ras_addr_hook);
- if (set_ras_addr && ct->status & IPS_NAT_MASK) {
+ if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK) {
ret = set_ras_addr(skb, ct, ctinfo, data,
&irr->rasAddress, 1);
if (ret < 0)
@@ -1636,7 +1652,8 @@ static int process_irr(struct sk_buff *skb, struct nf_conn *ct,
}
set_sig_addr = rcu_dereference(set_sig_addr_hook);
- if (set_sig_addr && ct->status & IPS_NAT_MASK) {
+ if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK) {
ret = set_sig_addr(skb, ct, ctinfo, data,
irr->callSignalAddress.item,
irr->callSignalAddress.count);
diff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c
index 009c52c..e06dc2f 100644
--- a/net/netfilter/nf_conntrack_irc.c
+++ b/net/netfilter/nf_conntrack_irc.c
@@ -204,7 +204,8 @@ static int help(struct sk_buff *skb, unsigned int protoff,
IPPROTO_TCP, NULL, &port);
nf_nat_irc = rcu_dereference(nf_nat_irc_hook);
- if (nf_nat_irc && ct->status & IPS_NAT_MASK)
+ if (nf_nat_irc && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK)
ret = nf_nat_irc(skb, ctinfo,
addr_beg_p - ib_ptr,
addr_end_p - addr_beg_p,
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 5c0a112..d08e0ba 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -981,7 +981,8 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int dataoff,
IPPROTO_UDP, NULL, &rtcp_port);
nf_nat_sdp_media = rcu_dereference(nf_nat_sdp_media_hook);
- if (nf_nat_sdp_media && ct->status & IPS_NAT_MASK && !direct_rtp)
+ if (nf_nat_sdp_media && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK && !direct_rtp)
ret = nf_nat_sdp_media(skb, dataoff, dptr, datalen,
rtp_exp, rtcp_exp,
mediaoff, medialen, daddr);
@@ -1104,7 +1105,8 @@ static int process_sdp(struct sk_buff *skb, unsigned int dataoff,
return ret;
/* Update media connection address if present */
- if (maddr_len && nf_nat_sdp_addr && ct->status & IPS_NAT_MASK) {
+ if (maddr_len && nf_nat_sdp_addr &&
+ nf_ct_l3num(ct) == NFPROTO_IPV4 && ct->status & IPS_NAT_MASK) {
ret = nf_nat_sdp_addr(skb, dataoff, dptr, datalen,
mediaoff, c_hdr, SDP_HDR_MEDIA,
&rtp_addr);
@@ -1116,7 +1118,8 @@ static int process_sdp(struct sk_buff *skb, unsigned int dataoff,
/* Update session connection and owner addresses */
nf_nat_sdp_session = rcu_dereference(nf_nat_sdp_session_hook);
- if (nf_nat_sdp_session && ct->status & IPS_NAT_MASK)
+ if (nf_nat_sdp_session && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK)
ret = nf_nat_sdp_session(skb, dataoff, dptr, datalen, sdpoff,
&rtp_addr);
@@ -1275,7 +1278,8 @@ static int process_register_request(struct sk_buff *skb, unsigned int dataoff,
exp->flags = NF_CT_EXPECT_PERMANENT | NF_CT_EXPECT_INACTIVE;
nf_nat_sip_expect = rcu_dereference(nf_nat_sip_expect_hook);
- if (nf_nat_sip_expect && ct->status & IPS_NAT_MASK)
+ if (nf_nat_sip_expect && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK)
ret = nf_nat_sip_expect(skb, dataoff, dptr, datalen, exp,
matchoff, matchlen);
else {
@@ -1453,7 +1457,8 @@ static int process_sip_msg(struct sk_buff *skb, struct nf_conn *ct,
else
ret = process_sip_response(skb, dataoff, dptr, datalen);
- if (ret == NF_ACCEPT && ct->status & IPS_NAT_MASK) {
+ if (ret == NF_ACCEPT && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK) {
nf_nat_sip = rcu_dereference(nf_nat_sip_hook);
if (nf_nat_sip && !nf_nat_sip(skb, dataoff, dptr, datalen))
ret = NF_DROP;
@@ -1534,7 +1539,8 @@ static int sip_help_tcp(struct sk_buff *skb, unsigned int protoff,
datalen = datalen + diff - msglen;
}
- if (ret == NF_ACCEPT && ct->status & IPS_NAT_MASK) {
+ if (ret == NF_ACCEPT && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK) {
nf_nat_sip_seq_adjust = rcu_dereference(nf_nat_sip_seq_adjust_hook);
if (nf_nat_sip_seq_adjust)
nf_nat_sip_seq_adjust(skb, tdiff);
diff --git a/net/netfilter/nf_conntrack_tftp.c b/net/netfilter/nf_conntrack_tftp.c
index 81fc61c..9363e1c 100644
--- a/net/netfilter/nf_conntrack_tftp.c
+++ b/net/netfilter/nf_conntrack_tftp.c
@@ -72,7 +72,8 @@ static int tftp_help(struct sk_buff *skb,
nf_ct_dump_tuple(&exp->tuple);
nf_nat_tftp = rcu_dereference(nf_nat_tftp_hook);
- if (nf_nat_tftp && ct->status & IPS_NAT_MASK)
+ if (nf_nat_tftp && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ ct->status & IPS_NAT_MASK)
ret = nf_nat_tftp(skb, ctinfo, exp);
else if (nf_ct_expect_related(exp) != 0)
ret = NF_DROP;
--
1.7.1
^ permalink raw reply related
* [PATCH 03/18] netfilter: nf_conntrack_ipv6: fix tracking of ICMPv6 error messages containing fragments
From: Patrick McHardy @ 2012-08-20 3:39 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
In-Reply-To: <1345434006-16549-1-git-send-email-kaber@trash.net>
ICMPv6 error messages are tracked by extracting the conntrack tuple of
the inner packet and looking up the corresponding conntrack entry. Tuple
extraction uses the ->get_l4proto() callback, which in case of fragments
returns NEXTHDR_FRAGMENT instead of the upper protocol, even for the
first fragment when the entire next header is present, resulting in a
failure to find the correct connection tracking entry.
This patch changes ipv6_get_l4proto() to use ipv6_skip_exthdr() instead
of nf_ct_ipv6_skip_exthdr() in order to skip fragment headers when the
fragment offset is zero.
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c | 63 ++---------------------
1 files changed, 6 insertions(+), 57 deletions(-)
diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
index 521ddca..dcf6010 100644
--- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -64,82 +64,31 @@ static int ipv6_print_tuple(struct seq_file *s,
tuple->src.u3.ip6, tuple->dst.u3.ip6);
}
-/*
- * Based on ipv6_skip_exthdr() in net/ipv6/exthdr.c
- *
- * This function parses (probably truncated) exthdr set "hdr"
- * of length "len". "nexthdrp" initially points to some place,
- * where type of the first header can be found.
- *
- * It skips all well-known exthdrs, and returns pointer to the start
- * of unparsable area i.e. the first header with unknown type.
- * if success, *nexthdr is updated by type/protocol of this header.
- *
- * NOTES: - it may return pointer pointing beyond end of packet,
- * if the last recognized header is truncated in the middle.
- * - if packet is truncated, so that all parsed headers are skipped,
- * it returns -1.
- * - if packet is fragmented, return pointer of the fragment header.
- * - ESP is unparsable for now and considered like
- * normal payload protocol.
- * - Note also special handling of AUTH header. Thanks to IPsec wizards.
- */
-
-static int nf_ct_ipv6_skip_exthdr(const struct sk_buff *skb, int start,
- u8 *nexthdrp, int len)
-{
- u8 nexthdr = *nexthdrp;
-
- while (ipv6_ext_hdr(nexthdr)) {
- struct ipv6_opt_hdr hdr;
- int hdrlen;
-
- if (len < (int)sizeof(struct ipv6_opt_hdr))
- return -1;
- if (nexthdr == NEXTHDR_NONE)
- break;
- if (nexthdr == NEXTHDR_FRAGMENT)
- break;
- if (skb_copy_bits(skb, start, &hdr, sizeof(hdr)))
- BUG();
- if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hdr.hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(&hdr);
-
- nexthdr = hdr.nexthdr;
- len -= hdrlen;
- start += hdrlen;
- }
-
- *nexthdrp = nexthdr;
- return start;
-}
-
static int ipv6_get_l4proto(const struct sk_buff *skb, unsigned int nhoff,
unsigned int *dataoff, u_int8_t *protonum)
{
unsigned int extoff = nhoff + sizeof(struct ipv6hdr);
- unsigned char pnum;
+ __be16 frag_off;
int protoff;
+ u8 nexthdr;
if (skb_copy_bits(skb, nhoff + offsetof(struct ipv6hdr, nexthdr),
- &pnum, sizeof(pnum)) != 0) {
+ &nexthdr, sizeof(nexthdr)) != 0) {
pr_debug("ip6_conntrack_core: can't get nexthdr\n");
return -NF_ACCEPT;
}
- protoff = nf_ct_ipv6_skip_exthdr(skb, extoff, &pnum, skb->len - extoff);
+ protoff = ipv6_skip_exthdr(skb, extoff, &nexthdr, &frag_off);
/*
* (protoff == skb->len) mean that the packet doesn't have no data
* except of IPv6 & ext headers. but it's tracked anyway. - YK
*/
- if ((protoff < 0) || (protoff > skb->len)) {
+ if (protoff < 0 || (frag_off & htons(~0x7)) != 0) {
pr_debug("ip6_conntrack_core: can't find proto in pkt\n");
return -NF_ACCEPT;
}
*dataoff = protoff;
- *protonum = pnum;
+ *protonum = nexthdr;
return NF_ACCEPT;
}
--
1.7.1
^ permalink raw reply related
* [PATCH 02/18] netfilter: nf_conntrack_ipv6: improve fragmentation handling
From: Patrick McHardy @ 2012-08-20 3:39 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
In-Reply-To: <1345434006-16549-1-git-send-email-kaber@trash.net>
The IPv6 conntrack fragmentation currently has a couple of shortcomings.
Fragmentes are collected in PREROUTING/OUTPUT, are defragmented, the
defragmented packet is then passed to conntrack, the resulting conntrack
information is attached to each original fragment and the fragments then
continue their way through the stack.
Helper invocation occurs in the POSTROUTING hook, at which point only
the original fragments are available. The result of this is that
fragmented packets are never passed to helpers.
This patch improves the situation in the following way:
- If a reassembled packet belongs to a connection that has a helper
assigned, the reassembled packet is passed through the stack instead
of the original fragments.
- During defragmentation, the largest received fragment size is stored.
On output, the packet is refragmented if required. If the largest
received fragment size exceeds the outgoing MTU, a "packet too big"
message is generated, thus behaving as if the original fragments
were passed through the stack from an outside point of view.
- The ipv6_helper() hook function can't receive fragments anymore for
connections using a helper, so it is switched to use ipv6_skip_exthdr()
instead of the netfilter specific nf_ct_ipv6_skip_exthdr() and the
reassembled packets are passed to connection tracking helpers.
The result of this is that we can properly track fragmented packets, but
still generate ICMPv6 Packet too big messages if we would have before.
This patch is also required as a precondition for IPv6 NAT, where NAT
helpers might enlarge packets up to a point that they require
fragmentation. In that case we can't generate Packet too big messages
since the proper MTU can't be calculated in all cases (f.i. when
changing textual representation of a variable amount of addresses),
so the packet is transparently fragmented iff the original packet or
fragments would have fit the outgoing MTU.
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
include/linux/ipv6.h | 1 +
net/ipv6/ip6_output.c | 7 +++-
net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c | 41 ++++++++++++++++++-----
net/ipv6/netfilter/nf_conntrack_reasm.c | 19 +++++++++--
4 files changed, 54 insertions(+), 14 deletions(-)
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 879db26..0b94e91 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -256,6 +256,7 @@ struct inet6_skb_parm {
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
__u16 dsthao;
#endif
+ __u16 frag_max_size;
#define IP6SKB_XFRM_TRANSFORMED 1
#define IP6SKB_FORWARDED 2
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 5b2d63e..a4f6263 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -493,7 +493,8 @@ int ip6_forward(struct sk_buff *skb)
if (mtu < IPV6_MIN_MTU)
mtu = IPV6_MIN_MTU;
- if (skb->len > mtu && !skb_is_gso(skb)) {
+ if ((!skb->local_df && skb->len > mtu && !skb_is_gso(skb)) ||
+ (IP6CB(skb)->frag_max_size && IP6CB(skb)->frag_max_size > mtu)) {
/* Again, force OUTPUT device used as source address */
skb->dev = dst->dev;
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
@@ -636,7 +637,9 @@ int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
/* We must not fragment if the socket is set to force MTU discovery
* or if the skb it not generated by a local socket.
*/
- if (unlikely(!skb->local_df && skb->len > mtu)) {
+ if (unlikely(!skb->local_df && skb->len > mtu) ||
+ (IP6CB(skb)->frag_max_size &&
+ IP6CB(skb)->frag_max_size > mtu)) {
if (skb->sk && dst_allfrag(skb_dst(skb)))
sk_nocaps_add(skb->sk, NETIF_F_GSO_MASK);
diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
index 4794f96..521ddca 100644
--- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -153,10 +153,10 @@ static unsigned int ipv6_helper(unsigned int hooknum,
const struct nf_conn_help *help;
const struct nf_conntrack_helper *helper;
enum ip_conntrack_info ctinfo;
- unsigned int ret, protoff;
- unsigned int extoff = (u8 *)(ipv6_hdr(skb) + 1) - skb->data;
- unsigned char pnum = ipv6_hdr(skb)->nexthdr;
-
+ unsigned int ret;
+ __be16 frag_off;
+ int protoff;
+ u8 nexthdr;
/* This is where we call the helper: as the packet goes out. */
ct = nf_ct_get(skb, &ctinfo);
@@ -171,9 +171,10 @@ static unsigned int ipv6_helper(unsigned int hooknum,
if (!helper)
return NF_ACCEPT;
- protoff = nf_ct_ipv6_skip_exthdr(skb, extoff, &pnum,
- skb->len - extoff);
- if (protoff > skb->len || pnum == NEXTHDR_FRAGMENT) {
+ nexthdr = ipv6_hdr(skb)->nexthdr;
+ protoff = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &nexthdr,
+ &frag_off);
+ if (protoff < 0 || (frag_off & htons(~0x7)) != 0) {
pr_debug("proto header not found\n");
return NF_ACCEPT;
}
@@ -199,9 +200,14 @@ static unsigned int ipv6_confirm(unsigned int hooknum,
static unsigned int __ipv6_conntrack_in(struct net *net,
unsigned int hooknum,
struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
struct sk_buff *reasm = skb->nfct_reasm;
+ const struct nf_conn_help *help;
+ struct nf_conn *ct;
+ enum ip_conntrack_info ctinfo;
/* This packet is fragmented and has reassembled packet. */
if (reasm) {
@@ -213,6 +219,23 @@ static unsigned int __ipv6_conntrack_in(struct net *net,
if (ret != NF_ACCEPT)
return ret;
}
+
+ /* Conntrack helpers need the entire reassembled packet in the
+ * POST_ROUTING hook.
+ */
+ ct = nf_ct_get(reasm, &ctinfo);
+ if (ct != NULL && !nf_ct_is_untracked(ct)) {
+ help = nfct_help(ct);
+ if (help && help->helper) {
+ nf_conntrack_get_reasm(skb);
+ NF_HOOK_THRESH(NFPROTO_IPV6, hooknum, reasm,
+ (struct net_device *)in,
+ (struct net_device *)out,
+ okfn, NF_IP6_PRI_CONNTRACK + 1);
+ return NF_DROP_ERR(-ECANCELED);
+ }
+ }
+
nf_conntrack_get(reasm->nfct);
skb->nfct = reasm->nfct;
skb->nfctinfo = reasm->nfctinfo;
@@ -228,7 +251,7 @@ static unsigned int ipv6_conntrack_in(unsigned int hooknum,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- return __ipv6_conntrack_in(dev_net(in), hooknum, skb, okfn);
+ return __ipv6_conntrack_in(dev_net(in), hooknum, skb, in, out, okfn);
}
static unsigned int ipv6_conntrack_local(unsigned int hooknum,
@@ -242,7 +265,7 @@ static unsigned int ipv6_conntrack_local(unsigned int hooknum,
net_notice_ratelimited("ipv6_conntrack_local: packet too short\n");
return NF_ACCEPT;
}
- return __ipv6_conntrack_in(dev_net(out), hooknum, skb, okfn);
+ return __ipv6_conntrack_in(dev_net(out), hooknum, skb, in, out, okfn);
}
static struct nf_hook_ops ipv6_conntrack_ops[] __read_mostly = {
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index c9c78c2..f94fb3a 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -190,6 +190,7 @@ static int nf_ct_frag6_queue(struct nf_ct_frag6_queue *fq, struct sk_buff *skb,
const struct frag_hdr *fhdr, int nhoff)
{
struct sk_buff *prev, *next;
+ unsigned int payload_len;
int offset, end;
if (fq->q.last_in & INET_FRAG_COMPLETE) {
@@ -197,8 +198,10 @@ static int nf_ct_frag6_queue(struct nf_ct_frag6_queue *fq, struct sk_buff *skb,
goto err;
}
+ payload_len = ntohs(ipv6_hdr(skb)->payload_len);
+
offset = ntohs(fhdr->frag_off) & ~0x7;
- end = offset + (ntohs(ipv6_hdr(skb)->payload_len) -
+ end = offset + (payload_len -
((u8 *)(fhdr + 1) - (u8 *)(ipv6_hdr(skb) + 1)));
if ((unsigned int)end > IPV6_MAXPLEN) {
@@ -307,6 +310,8 @@ found:
skb->dev = NULL;
fq->q.stamp = skb->tstamp;
fq->q.meat += skb->len;
+ if (payload_len > fq->q.max_size)
+ fq->q.max_size = payload_len;
atomic_add(skb->truesize, &nf_init_frags.mem);
/* The first fragment.
@@ -412,10 +417,12 @@ nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
}
atomic_sub(head->truesize, &nf_init_frags.mem);
+ head->local_df = 1;
head->next = NULL;
head->dev = dev;
head->tstamp = fq->q.stamp;
ipv6_hdr(head)->payload_len = htons(payload_len);
+ IP6CB(head)->frag_max_size = sizeof(struct ipv6hdr) + fq->q.max_size;
/* Yes, and fold redundant checksum back. 8) */
if (head->ip_summed == CHECKSUM_COMPLETE)
@@ -592,6 +599,7 @@ void nf_ct_frag6_output(unsigned int hooknum, struct sk_buff *skb,
int (*okfn)(struct sk_buff *))
{
struct sk_buff *s, *s2;
+ unsigned int ret = 0;
for (s = NFCT_FRAG6_CB(skb)->orig; s;) {
nf_conntrack_put_reasm(s->nfct_reasm);
@@ -601,8 +609,13 @@ void nf_ct_frag6_output(unsigned int hooknum, struct sk_buff *skb,
s2 = s->next;
s->next = NULL;
- NF_HOOK_THRESH(NFPROTO_IPV6, hooknum, s, in, out, okfn,
- NF_IP6_PRI_CONNTRACK_DEFRAG + 1);
+ if (ret != -ECANCELED)
+ ret = NF_HOOK_THRESH(NFPROTO_IPV6, hooknum, s,
+ in, out, okfn,
+ NF_IP6_PRI_CONNTRACK_DEFRAG + 1);
+ else
+ kfree_skb(s);
+
s = s2;
}
nf_conntrack_put_reasm(skb);
--
1.7.1
^ permalink raw reply related
* [PATCH 00/18] netfilter: IPv6 NAT
From: Patrick McHardy @ 2012-08-20 3:39 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev
Following is the latest IPv6 NAT patchset, based on -rc2.
Changes since the last posting include:
- removal of fixes already merged into nf-2.6, not included upstream
yet though, IPv6 SIP will not work
- missing module alias for ip6t_DNAT/ip6t_SNAT added to xt_nat
- compilation fix for ip6t_MASQUERADE without ipt_MASQUERADE enabled
- proper handling of untracked packets in IPv6 fragmentation improvements
- byteorder fixes in IPv6 fragment handling
- conversion to use a mutex for NAT L3/L4 protocol registration
- missing memory barrier before publishing L4 protocol array
- proper cleanup of NATed connections after NAT L3/L4 protocol unregistration
- proper locking (RTNL) for walking network namespaces in NAT cleanup
- only free NAT L4 protocol array at shutdown instead of during L3 protocol
unregistation, otherwise non built-in protocols are missing after L3
protocol reload
- endianess annotation fixes
- missing netlink policy for IPv6 NAT attributes
I'll also push these patches to github, but it is currently acting up,
once it works again they'll be available at
git://github.com/kaber/nf-nat-ipv6.git master
^ permalink raw reply
* [PATCH net-next] ipv4/netfilter: remove unnecessary goto statement for error recovery
From: Patrick McHardy @ 2012-08-20 2:43 UTC (permalink / raw)
To: Jean Sacren; +Cc: netfilter-devel, netdev
> Usually it's a good practice to use goto statement for error recovery
> when initializing the module. This approach could be an overkill if:
>
> 1) there is only one fail case;
> 2) success and failure use the same return statement.
>
> For a cleaner approach, remove the unnecessary goto statement and
> directly implement error recovery.
We have tons of similar cases. And this is much better than directly
adding rollback since it doesn't require changing unrelated code if
anything new is added to the initialization code. Additionally its
usually directly comparable to the cleanup code.
^ permalink raw reply
* [PATCH v2] iproute2: configure: Add search path for 64bit library.
From: Li Wei @ 2012-08-20 1:41 UTC (permalink / raw)
To: shemminger; +Cc: bhutchings, netdev, Li Wei
In-Reply-To: <20120813093323.1506aa83@nehalam.linuxnetplumber.net>
Use pkg-config to tell us the library path and fallback to search
old paths if xtables.pc not exists.
Signed-off-by: Li Wei <lw@cn.fujitsu.com>
---
Changes from v1:
- use pkg-config as Ben and Stephen suggested.
configure | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/configure b/configure
index a1916de..db7cd6a 100755
--- a/configure
+++ b/configure
@@ -148,7 +148,13 @@ check_ipt()
check_ipt_lib_dir()
{
- IPT_LIB_DIR=""
+ IPT_LIB_DIR=$(pkg-config --variable=xtlibdir xtables)
+ if [ -n "$IPT_LIB_DIR" ]; then
+ echo $IPT_LIB_DIR
+ echo "IPT_LIB_DIR:=$IPT_LIB_DIR" >> Config
+ return
+ fi
+
for dir in /lib /usr/lib /usr/local/lib
do
for file in $dir/{xtables,iptables}/lib*t_*so ; do
--
1.7.10.1
^ permalink raw reply related
* Dear Sir/Madam
From: Allen and Violet Large @ 2012-08-20 1:33 UTC (permalink / raw)
--
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^ permalink raw reply
* [PATCH net-next] ipv4/netfilter: remove unnecessary goto statement for error recovery
From: Jean Sacren @ 2012-08-20 1:11 UTC (permalink / raw)
To: netfilter-devel, netdev
Usually it's a good practice to use goto statement for error recovery
when initializing the module. This approach could be an overkill if:
1) there is only one fail case;
2) success and failure use the same return statement.
For a cleaner approach, remove the unnecessary goto statement and
directly implement error recovery.
Signed-off-by: Jean Sacren <sakiwit@gmail.com>
---
net/ipv4/netfilter/iptable_filter.c | 6 +-----
net/ipv4/netfilter/iptable_mangle.c | 6 +-----
net/ipv4/netfilter/iptable_raw.c | 6 +-----
3 files changed, 3 insertions(+), 15 deletions(-)
diff --git a/net/ipv4/netfilter/iptable_filter.c b/net/ipv4/netfilter/iptable_filter.c
index 851acec8..9255fd4 100644
--- a/net/ipv4/netfilter/iptable_filter.c
+++ b/net/ipv4/netfilter/iptable_filter.c
@@ -96,14 +96,10 @@ static int __init iptable_filter_init(void)
filter_ops = xt_hook_link(&packet_filter, iptable_filter_hook);
if (IS_ERR(filter_ops)) {
ret = PTR_ERR(filter_ops);
- goto cleanup_table;
+ unregister_pernet_subsys(&iptable_filter_net_ops);
}
return ret;
-
- cleanup_table:
- unregister_pernet_subsys(&iptable_filter_net_ops);
- return ret;
}
static void __exit iptable_filter_fini(void)
diff --git a/net/ipv4/netfilter/iptable_mangle.c b/net/ipv4/netfilter/iptable_mangle.c
index aef5d1f..25549c5 100644
--- a/net/ipv4/netfilter/iptable_mangle.c
+++ b/net/ipv4/netfilter/iptable_mangle.c
@@ -131,14 +131,10 @@ static int __init iptable_mangle_init(void)
mangle_ops = xt_hook_link(&packet_mangler, iptable_mangle_hook);
if (IS_ERR(mangle_ops)) {
ret = PTR_ERR(mangle_ops);
- goto cleanup_table;
+ unregister_pernet_subsys(&iptable_mangle_net_ops);
}
return ret;
-
- cleanup_table:
- unregister_pernet_subsys(&iptable_mangle_net_ops);
- return ret;
}
static void __exit iptable_mangle_fini(void)
diff --git a/net/ipv4/netfilter/iptable_raw.c b/net/ipv4/netfilter/iptable_raw.c
index 07fb710..6acf7ca 100644
--- a/net/ipv4/netfilter/iptable_raw.c
+++ b/net/ipv4/netfilter/iptable_raw.c
@@ -75,14 +75,10 @@ static int __init iptable_raw_init(void)
rawtable_ops = xt_hook_link(&packet_raw, iptable_raw_hook);
if (IS_ERR(rawtable_ops)) {
ret = PTR_ERR(rawtable_ops);
- goto cleanup_table;
+ unregister_pernet_subsys(&iptable_raw_net_ops);
}
return ret;
-
- cleanup_table:
- unregister_pernet_subsys(&iptable_raw_net_ops);
- return ret;
}
static void __exit iptable_raw_fini(void)
^ permalink raw reply related
* Re: [PATCH v1 3/5] cgroup: Protect access to task_cls_classid() when built as module
From: Li Zefan @ 2012-08-20 0:59 UTC (permalink / raw)
To: Neil Horman
Cc: Daniel Wagner, netdev, cgroups, Daniel Wagner, David S. Miller,
Gao feng, Jamal Hadi Salim, John Fastabend, Tejun Heo
In-Reply-To: <20120817182855.GA11607@hmsreliant.think-freely.org>
于 2012/8/18 2:28, Neil Horman 写道:
> On Fri, Aug 17, 2012 at 04:58:12PM +0200, Daniel Wagner wrote:
>> From: Daniel Wagner <daniel.wagner@bmw-carit.de>
>>
>> The module version of task_cls_classid() checks if net_cls_sbusys_id
>> is valid to indentify when it is okay to access the controller.
>>
>> Instead relying on the subusys_id to be set, make it explicit
>> with a jump label.
>>
>> Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
>> Cc: "David S. Miller" <davem@davemloft.net>
>> Cc: Gao feng <gaofeng@cn.fujitsu.com>
>> Cc: Jamal Hadi Salim <jhs@mojatatu.com>
>> Cc: John Fastabend <john.r.fastabend@intel.com>
>> Cc: Li Zefan <lizefan@huawei.com>
>> Cc: Neil Horman <nhorman@tuxdriver.com>
>> Cc: Tejun Heo <tj@kernel.org>
>> Cc: netdev@vger.kernel.org
>> Cc: cgroups@vger.kernel.org
>> ---
>> include/net/cls_cgroup.h | 5 ++++-
>> net/core/sock.c | 5 +++++
>> net/sched/cls_cgroup.c | 9 +++++++++
>> 3 files changed, 18 insertions(+), 1 deletion(-)
>>
>> diff --git a/include/net/cls_cgroup.h b/include/net/cls_cgroup.h
>> index 401672c..bbbd957 100644
>> --- a/include/net/cls_cgroup.h
>> +++ b/include/net/cls_cgroup.h
>> @@ -16,6 +16,7 @@
>> #include <linux/cgroup.h>
>> #include <linux/hardirq.h>
>> #include <linux/rcupdate.h>
>> +#include <linux/jump_label.h>
>>
>> #ifdef CONFIG_CGROUPS
>> struct cgroup_cls_state
>> @@ -44,6 +45,8 @@ static inline u32 task_cls_classid(struct task_struct *p)
>> }
>>
>> #elif IS_MODULE(CONFIG_NET_CLS_CGROUP)
>> +extern struct static_key cgroup_cls_enabled;
>> +#define clscg_enabled static_key_false(&cgroup_cls_enabled)
>>
>> extern int net_cls_subsys_id;
>>
>> @@ -52,7 +55,7 @@ static inline u32 task_cls_classid(struct task_struct *p)
>> int id;
>> u32 classid = 0;
>>
>> - if (in_interrupt())
>> + if (!clscg_enabled || in_interrupt())
>> return 0;
>>
>> rcu_read_lock();
>> diff --git a/net/core/sock.c b/net/core/sock.c
>> index 8f67ced..8106e77 100644
>> --- a/net/core/sock.c
>> +++ b/net/core/sock.c
>> @@ -327,6 +327,11 @@ int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
>> EXPORT_SYMBOL(__sk_backlog_rcv);
>>
>> #if defined(CONFIG_CGROUPS)
>> +#if IS_MODULE(CONFIG_NET_CLS_CGROUP)
>> +struct static_key cgroup_cls_enabled = STATIC_KEY_INIT_FALSE;
>> +EXPORT_SYMBOL_GPL(cgroup_cls_enabled);
>> +#endif
>> +
>> #if !defined(CONFIG_NET_CLS_CGROUP)
>> int net_cls_subsys_id = -1;
>> EXPORT_SYMBOL_GPL(net_cls_subsys_id);
>> diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
>> index 7743ea8..0635894 100644
>> --- a/net/sched/cls_cgroup.c
>> +++ b/net/sched/cls_cgroup.c
>> @@ -44,12 +44,21 @@ static struct cgroup_subsys_state *cgrp_create(struct cgroup *cgrp)
>>
>> if (cgrp->parent)
>> cs->classid = cgrp_cls_state(cgrp->parent)->classid;
>> +#if IS_MODULE(CONFIG_NET_CLS_CGROUP)
>> + else if (!clscg_enabled)
>> + static_key_slow_inc(&cgroup_cls_enabled);
> This is racy I think. The read of the static key is atomic with other reads,
> but the entire conditional is not atomic. If two cpus were creating cgroups in
> parallel, it would be possible for both to read the static key as being zero
> (the second cpu would read the key before the first cpu could increment it).
static_key_slow_inc() is called only when we're creating the root cgroup, and that's
module loading.
so it's safe.
>> +#endif
>>
>> return &cs->css;
>> }
>>
>> static void cgrp_destroy(struct cgroup *cgrp)
>> {
>> +#if IS_MODULE(CONFIG_NET_CLS_CGROUP)
>> + if (!cgrp->parent && clscg_enabled)
>> + static_key_slow_dec(&cgroup_cls_enabled);
> Ditto here with the race above. I think what you want is one of:
and this is called only when we're destroying the root cgroup, and that's
module unload.
^ permalink raw reply
* Re: [PATCH] net/fsl: introduce Freescale 10G MDIO driver
From: Tabi Timur-B04825 @ 2012-08-20 0:59 UTC (permalink / raw)
To: Francois Romieu
Cc: Fleming Andy-AFLEMING, David Miller, netdev@vger.kernel.org
In-Reply-To: <20120819224804.GA28300@electric-eye.fr.zoreil.com>
On Aug 19, 2012, at 6:03 PM, "Francois Romieu" <romieu@fr.zoreil.com> wrote:
> Tabi Timur-B04825 <B04825@freescale.com> :
> [...]
>> I don't see any real savings here.
>
> xgmac_mdio_free_bus_wait could return -ETIMEDOUT and include the
> debug message.
Ok.
>
> --
> Ueimor
>
^ permalink raw reply
* Re: [PATCH] net/fsl: introduce Freescale 10G MDIO driver
From: Francois Romieu @ 2012-08-19 22:48 UTC (permalink / raw)
To: Tabi Timur-B04825
Cc: Fleming Andy-AFLEMING, David Miller, netdev@vger.kernel.org
In-Reply-To: <50315A18.2040105@freescale.com>
Tabi Timur-B04825 <B04825@freescale.com> :
[...]
> I don't see any real savings here.
xgmac_mdio_free_bus_wait could return -ETIMEDOUT and include the
debug message.
--
Ueimor
^ permalink raw reply
* [PATCH v2] serial: add a new helper function
From: Huang Shijie @ 2012-08-19 21:33 UTC (permalink / raw)
To: gregkh; +Cc: alan, jirislaby, linux-kernel, linux-serial, netdev, Huang Shijie
In most of the time, the driver needs to check if the cts flow control
is enabled. But now, the driver checks the ASYNC_CTS_FLOW flag manually,
which is not a grace way. So add a new wraper function to make the code
tidy and clean.
Signed-off-by: Huang Shijie <shijie8@gmail.com>
---
v1 --> v2:
move the new help function to serial.h
---
drivers/char/pcmcia/synclink_cs.c | 2 +-
drivers/tty/amiserial.c | 2 +-
drivers/tty/cyclades.c | 2 +-
drivers/tty/isicom.c | 2 +-
drivers/tty/mxser.c | 2 +-
drivers/tty/serial/mxs-auart.c | 2 +-
drivers/tty/serial/serial_core.c | 4 ++--
drivers/tty/synclink.c | 2 +-
drivers/tty/synclink_gt.c | 2 +-
drivers/tty/synclinkmp.c | 2 +-
include/linux/serial.h | 7 +++++++
net/irda/ircomm/ircomm_tty.c | 4 ++--
net/irda/ircomm/ircomm_tty_attach.c | 2 +-
13 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 5db08c7..3f57d5de 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -1050,7 +1050,7 @@ static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty)
wake_up_interruptible(&info->status_event_wait_q);
wake_up_interruptible(&info->event_wait_q);
- if (info->port.flags & ASYNC_CTS_FLOW) {
+ if (tty_port_cts_enabled(&info->port)) {
if (tty->hw_stopped) {
if (info->serial_signals & SerialSignal_CTS) {
if (debug_level >= DEBUG_LEVEL_ISR)
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 2b7535d..42d0a25 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -420,7 +420,7 @@ static void check_modem_status(struct serial_state *info)
tty_hangup(port->tty);
}
}
- if (port->flags & ASYNC_CTS_FLOW) {
+ if (tty_port_cts_enabled(port)) {
if (port->tty->hw_stopped) {
if (!(status & SER_CTS)) {
#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index e3954da..0a6a0bc 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -727,7 +727,7 @@ static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
else
tty_hangup(tty);
}
- if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
+ if ((mdm_change & CyCTS) && tty_port_cts_enabled(&info->port)) {
if (tty->hw_stopped) {
if (mdm_status & CyCTS) {
/* cy_start isn't used
diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c
index 99cf22e..d7492e1 100644
--- a/drivers/tty/isicom.c
+++ b/drivers/tty/isicom.c
@@ -600,7 +600,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
port->status &= ~ISI_DCD;
}
- if (port->port.flags & ASYNC_CTS_FLOW) {
+ if (tty_port_cts_enabled(&port->port)) {
if (tty->hw_stopped) {
if (header & ISI_CTS) {
port->port.tty->hw_stopped = 0;
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index bb2da4c..cfda47d 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -830,7 +830,7 @@ static void mxser_check_modem_status(struct tty_struct *tty,
wake_up_interruptible(&port->port.open_wait);
}
- if (port->port.flags & ASYNC_CTS_FLOW) {
+ if (tty_port_cts_enabled(&port->port)) {
if (tty->hw_stopped) {
if (status & UART_MSR_CTS) {
tty->hw_stopped = 0;
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 3a667ee..dafeef2 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -262,7 +262,7 @@ static void mxs_auart_set_mctrl(struct uart_port *u, unsigned mctrl)
ctrl &= ~AUART_CTRL2_RTSEN;
if (mctrl & TIOCM_RTS) {
- if (u->state->port.flags & ASYNC_CTS_FLOW)
+ if (tty_port_cts_enabled(&u->state->port))
ctrl |= AUART_CTRL2_RTSEN;
}
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 5b308c8..1920e5c 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -176,7 +176,7 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state,
uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR);
}
- if (port->flags & ASYNC_CTS_FLOW) {
+ if (tty_port_cts_enabled(port)) {
spin_lock_irq(&uport->lock);
if (!(uport->ops->get_mctrl(uport) & TIOCM_CTS))
tty->hw_stopped = 1;
@@ -2493,7 +2493,7 @@ void uart_handle_cts_change(struct uart_port *uport, unsigned int status)
uport->icount.cts++;
- if (port->flags & ASYNC_CTS_FLOW) {
+ if (tty_port_cts_enabled(port)) {
if (tty->hw_stopped) {
if (status) {
tty->hw_stopped = 0;
diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c
index 666aa14..70e3a52 100644
--- a/drivers/tty/synclink.c
+++ b/drivers/tty/synclink.c
@@ -1359,7 +1359,7 @@ static void mgsl_isr_io_pin( struct mgsl_struct *info )
}
}
- if ( (info->port.flags & ASYNC_CTS_FLOW) &&
+ if (tty_port_cts_enabled(&info->port) &&
(status & MISCSTATUS_CTS_LATCHED) ) {
if (info->port.tty->hw_stopped) {
if (status & MISCSTATUS_CTS) {
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index 45f6136..b38e954 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -2053,7 +2053,7 @@ static void cts_change(struct slgt_info *info, unsigned short status)
wake_up_interruptible(&info->event_wait_q);
info->pending_bh |= BH_STATUS;
- if (info->port.flags & ASYNC_CTS_FLOW) {
+ if (tty_port_cts_enabled(&info->port)) {
if (info->port.tty) {
if (info->port.tty->hw_stopped) {
if (info->signals & SerialSignal_CTS) {
diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c
index 53429c8..f17d9f3 100644
--- a/drivers/tty/synclinkmp.c
+++ b/drivers/tty/synclinkmp.c
@@ -2500,7 +2500,7 @@ static void isr_io_pin( SLMP_INFO *info, u16 status )
}
}
- if ( (info->port.flags & ASYNC_CTS_FLOW) &&
+ if (tty_port_cts_enabled(&info->port) &&
(status & MISCSTATUS_CTS_LATCHED) ) {
if ( info->port.tty ) {
if (info->port.tty->hw_stopped) {
diff --git a/include/linux/serial.h b/include/linux/serial.h
index 90e9f98..154dc94 100644
--- a/include/linux/serial.h
+++ b/include/linux/serial.h
@@ -11,6 +11,7 @@
#define _LINUX_SERIAL_H
#include <linux/types.h>
+#include <linux/tty.h>
#ifdef __KERNEL__
#include <asm/page.h>
@@ -218,6 +219,12 @@ struct serial_rs485 {
are a royal PITA .. */
};
+/* If the cts flow control is enabled, return true. */
+static inline bool tty_port_cts_enabled(struct tty_port *port)
+{
+ return port->flags & ASYNC_CTS_FLOW;
+}
+
#ifdef __KERNEL__
#include <linux/compiler.h>
diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 9668990..95a3a7a 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -1070,7 +1070,7 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self)
goto put;
}
}
- if (tty && self->port.flags & ASYNC_CTS_FLOW) {
+ if (tty && tty_port_cts_enabled(&self->port)) {
if (tty->hw_stopped) {
if (status & IRCOMM_CTS) {
IRDA_DEBUG(2,
@@ -1313,7 +1313,7 @@ static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m)
seq_puts(m, "Flags:");
sep = ' ';
- if (self->port.flags & ASYNC_CTS_FLOW) {
+ if (tty_port_cts_enabled(&self->port)) {
seq_printf(m, "%cASYNC_CTS_FLOW", sep);
sep = '|';
}
diff --git a/net/irda/ircomm/ircomm_tty_attach.c b/net/irda/ircomm/ircomm_tty_attach.c
index 3ab70e7..edab393 100644
--- a/net/irda/ircomm/ircomm_tty_attach.c
+++ b/net/irda/ircomm/ircomm_tty_attach.c
@@ -578,7 +578,7 @@ void ircomm_tty_link_established(struct ircomm_tty_cb *self)
* will have to wait for the peer device (DCE) to raise the CTS
* line.
*/
- if ((self->port.flags & ASYNC_CTS_FLOW) &&
+ if (tty_port_cts_enabled(&self->port) &&
((self->settings.dce & IRCOMM_CTS) == 0)) {
IRDA_DEBUG(0, "%s(), waiting for CTS ...\n", __func__ );
goto put;
--
1.7.4.4
^ permalink raw reply related
* Re: [PATCH] net/fsl: introduce Freescale 10G MDIO driver
From: Tabi Timur-B04825 @ 2012-08-19 21:26 UTC (permalink / raw)
To: Francois Romieu
Cc: Tabi Timur-B04825, Fleming Andy-AFLEMING, David Miller,
netdev@vger.kernel.org
In-Reply-To: <20120819205724.GA27555@electric-eye.fr.zoreil.com>
Francois Romieu wrote:
>> >+ /* Wait till the bus is free */
>> >+ status = spin_event_timeout(
>> >+ !((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY), TIMEOUT, 0);
>> >+ if (!status) {
>> >+ dev_dbg(&bus->dev, "%s: timeout waiting for stat\n", __func__);
>> >+ return -ETIMEDOUT;
>> >+ }
> This code - comment included - is repeated several times. You may
> consider factoring it out in some xgmac_mdio_free_bus_wait function.
But it's just one line and a test. The function would look like this:
bool xgmac_mdio_free_bus_wait(struct tgec_mdio_controller __iomem *regs)
{
uint32_t status;
status = spin_event_timeout(
!((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY), TIMEOUT, 0);
return status != 0;
}
and then
if (!xgmac_mdio_free_bus_wait(regs)) {
dev_dbg(&bus->dev, "%s: timeout waiting for stat\n", __func__);
return -ETIMEDOUT;
}
I don't see any real savings here.
--
Timur Tabi
Linux kernel developer at Freescale
^ permalink raw reply
* Re: [PATCH 2/2] [RFC] netlink: fix possible spoofing from non-root processes
From: Pablo Neira Ayuso @ 2012-08-19 21:23 UTC (permalink / raw)
To: netdev; +Cc: davem
In-Reply-To: <1345224149-5946-3-git-send-email-pablo@netfilter.org>
[-- Attachment #1: Type: text/plain, Size: 550 bytes --]
On Fri, Aug 17, 2012 at 07:22:29PM +0200, pablo@netfilter.org wrote:
[...]
> [ I don't know any FOSS program making use of Netlink to communicate
> to processes, please, let me know if I'm missing anyone important ]
Patrick pinged me for little reminder on NETLINK_USERSOCK. We still
have to allow netlink-to-netlink userspace communication for it.
So, please find a new version of this patch that allows non-root
processes for that Netlink bus. For others, my patch restricts to root
processes the ability of sending messages with dst_pid != 0.
[-- Attachment #2: 0001-RFC-netlink-fix-possible-spoofing-from-non-root-proc.patch --]
[-- Type: text/x-diff, Size: 3095 bytes --]
>From 78ed359b9802569caebbf2d3507d08d6c7204a84 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Thu, 16 Aug 2012 17:58:18 +0200
Subject: [PATCH] [RFC] netlink: fix possible spoofing from non-root processes
Non-root user-space processes can send netlink messages to other
processes that are well-known for being subscribed to Netlink
asynchronous notifications. This allows ilegitimate non-root
process to send forged messages to them.
This is usually fixed by checking for Netlink portID in the
message receival path of the user-space process. In general,
portID == 0 means that the origin of the messages comes from the
kernel. Thus, discarding any message not coming from the kernel.
This is true for rtnetlink.
However, ctnetlink sets the portID in event messages that has
been triggered by some user-space process, eg. conntrack utility.
So other processes subscribed to ctnetlink events, eg. conntrackd,
know that the event was triggered by some user-space action.
This patch adds capability validation in case that dst_pid is set
in netlink_sendmsg(). This approach is aggressive since any existing
application using any of the Netlink busses to deliver messages
between two user-space processes will break.
[ Patrick McHardy has pinged me to let me know about NETLINK_USERSOCK.
Thus, this patch sets NL_CFG_F_NONROOT_SEND to allow non-root
netlink-to-netlink userspace communication for that Netlink bus. ]
However, if we want to ensure full backward compatibility, a new
version of this patch including NL_CFG_F_NONROOT_SEND flags need
to be set in all kernel subsystems. However, I don't think it
makes sense to use NETLINK_ROUTE to communicate two processes
that are sending no matter what information that is not related
to link/neighbouring/routing?
Still, if someone wants to make use of Netlink for this, eg.
I remember people willing to implement D-BUS over Netlink,
then they can reserve some Netlink bus explicitly for this and
set NL_CFG_F_NONROOT_SEND to it.
Reported-by: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netlink/af_netlink.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index d04f923..b3e0e2c 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1373,7 +1373,8 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
dst_pid = addr->nl_pid;
dst_group = ffs(addr->nl_groups);
err = -EPERM;
- if (dst_group && !netlink_capable(sock, NL_CFG_F_NONROOT_SEND))
+ if ((dst_group || dst_pid) &&
+ !netlink_capable(sock, NL_CFG_F_NONROOT_SEND))
goto out;
} else {
dst_pid = nlk->dst_pid;
@@ -2141,6 +2142,7 @@ static void __init netlink_add_usersock_entry(void)
rcu_assign_pointer(nl_table[NETLINK_USERSOCK].listeners, listeners);
nl_table[NETLINK_USERSOCK].module = THIS_MODULE;
nl_table[NETLINK_USERSOCK].registered = 1;
+ nl_table[NETLINK_USERSOCK].flags = NL_CFG_F_NONROOT_SEND;
netlink_table_ungrab();
}
--
1.7.10.4
^ permalink raw reply related
* Re: [PATCH] net/fsl: introduce Freescale 10G MDIO driver
From: Francois Romieu @ 2012-08-19 20:57 UTC (permalink / raw)
To: Timur Tabi; +Cc: Andy Fleming, David Miller, netdev
In-Reply-To: <1345233792-14985-1-git-send-email-timur@freescale.com>
Timur Tabi <timur@freescale.com> :
> Similar to fsl_pq_mdio.c, this driver is for the 10G MDIO controller on
> Freescale Frame Manager Ethernet controllers.
>
> Signed-off-by: Timur Tabi <timur@freescale.com>
> ---
[...]
> diff --git a/drivers/net/ethernet/freescale/xgmac_mdio.c b/drivers/net/ethernet/freescale/xgmac_mdio.c
> new file mode 100644
> index 0000000..1894476
> --- /dev/null
> +++ b/drivers/net/ethernet/freescale/xgmac_mdio.c
[...]
> +static int xgmac_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value)
> +{
> + struct tgec_mdio_controller __iomem *regs = bus->priv;
> + uint16_t dev_addr = regnum >> 16;
> + uint32_t status;
> +
> + /* Setup the MII Mgmt clock speed */
> + out_be32(®s->mdio_stat, MDIO_STAT_CLKDIV(100));
> +
> + /* Wait till the bus is free */
> + status = spin_event_timeout(
> + !((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY), TIMEOUT, 0);
> + if (!status) {
> + dev_dbg(&bus->dev, "%s: timeout waiting for stat\n", __func__);
> + return -ETIMEDOUT;
> + }
This code - comment included - is repeated several times. You may
consider factoring it out in some xgmac_mdio_free_bus_wait function.
--
Ueimor
^ permalink raw reply
* Re: network packet corruption in v3.6.0-rc1 (and also in v3.5)
From: Andrew Worsley @ 2012-08-19 20:20 UTC (permalink / raw)
To: Eric Dumazet; +Cc: David S. Miller, Alexey Kuznetsov, James Morris, netdev
In-Reply-To: <1345374134.5158.103.camel@edumazet-glaptop>
> OK, this seems to be related to r8712u, still in staging tree.
>
> At first glance, its using a buggy skb_clone(), or kind of a 'reuse skb'
> trick I have no time to investigate.
>
> I suspect that some memory area are overwritten by this driver, and this
> was not noticed with older kernels. With new kernels, its triggering a
> WARN_ON() in tcp stack.
>
> Any chance you can try to reproduce the bug with another adapter ?
Unfortunately I don't have another USB dongle. I could try to get the built in
Broadcom Corporation BCM4331 802.11a/b/g/n (rev 02)
Subsystem: Apple Inc. Device 00ef
but I need to dig out the proprietary firmware - which will take some
time as I am not familiar with the procedure.
The weird thing about this USB dongle is that I brought it because it
was claimed to be supported under Linux
idVendor 0x0b05 ASUSTek Computer, Inc.
idProduct 0x1786 USB-N10 802.11n Network Adapter [Realtek RTL8188SU]
RealTek driver web site - -
http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PNid=48&PFid=48&Level=5&Conn=4&DownTypeID=3&GetDown=false&Downloads=true#RTL8188SU
which claims support "Linux Kernel 2.6.18~2.6.38 and Kernel 3.0.2"
but requires I try compiling the driver from source
Andrew
^ permalink raw reply
* Re: [PATCH 05/19] netfilter: nf_conntrack_ipv6: improve fragmentation handling
From: Patrick McHardy @ 2012-08-19 19:44 UTC (permalink / raw)
To: Jesper Dangaard Brouer; +Cc: netfilter-devel, netdev
In-Reply-To: <1345405069.3069.241.camel@localhost>
On Sun, 19 Aug 2012, Jesper Dangaard Brouer wrote:
> On Sat, 2012-08-18 at 14:26 +0200, Patrick McHardy wrote:
>>>
>>> Could you provide an iptables command/rule, that trigger this code path?
>>
>> The easiest way is a large ping with the NAT patches also applied,
>> in that case we also pass the first packet of a connection through
>> the stack reassembled.
>
> So, a fragmented IPv6 ICMPv6 packet, I assume?
Correct.
> Don't I need to load some of the helper modules, or just the
> nf_conntrack_ipv6 module, or perhaps only nf_defrag_ipv6 ?
Not with the entire patchset, just IPv6 conntrack is enough. Aith IPv6 NAT
the first packet of a connection must always be defragemented, independant
of an assigned helper.
>>>> @@ -199,9 +200,13 @@ static unsigned int ipv6_confirm(unsigned int hooknum,
>>>> static unsigned int __ipv6_conntrack_in(struct net *net,
>>>> unsigned int hooknum,
>>>> struct sk_buff *skb,
>>>> + const struct net_device *in,
>>>> + const struct net_device *out,
>>>> int (*okfn)(struct sk_buff *))
>>>> {
>>>> struct sk_buff *reasm = skb->nfct_reasm;
>>>> + struct nf_conn *ct;
>>>> + enum ip_conntrack_info ctinfo;
>>>>
>>>> /* This packet is fragmented and has reassembled packet. */
>>>> if (reasm) {
>>>> @@ -213,6 +218,20 @@ static unsigned int __ipv6_conntrack_in(struct net *net,
>>>> if (ret != NF_ACCEPT)
>>>> return ret;
>>>> }
>>>> +
>>>> + /* Conntrack helpers need the entire reassembled packet in the
>>>> + * POST_ROUTING hook.
>>>> + */
>>>> + ct = nf_ct_get(reasm, &ctinfo);
>>>> + if (ct != NULL && test_bit(IPS_HELPER_BIT, &ct->status)) {
>>>> + nf_conntrack_get_reasm(skb);
>>>> + NF_HOOK_THRESH(NFPROTO_IPV6, hooknum, reasm,
>>>> + (struct net_device *)in,
>>>> + (struct net_device *)out,
>>>> + okfn, NF_IP6_PRI_CONNTRACK + 1);
>>>
>>> Hook prio change to NF_IP6_PRI_CONNTRACK + 1
>>
>> I didn't get this part, you want to change to PRE_CONNTRACK + 1? What
>> about raw and SELinux?
>
> No - I don't want any changes.
>
> I was just pointing out *where* the changes occur in your patch. This is
> just a "service" to other email readers, so they can spot the changes
> faster, I were referring to.
Could you send me your patch so I get a better picture of what you're
doing exactly?
^ permalink raw reply
* Re: [PATCH 05/19] netfilter: nf_conntrack_ipv6: improve fragmentation handling
From: Jesper Dangaard Brouer @ 2012-08-19 19:37 UTC (permalink / raw)
To: Patrick McHardy; +Cc: netfilter-devel, netdev
In-Reply-To: <Pine.GSO.4.63.1208181423050.17600@stinky-local.trash.net>
On Sat, 2012-08-18 at 14:26 +0200, Patrick McHardy wrote:
> On Fri, 17 Aug 2012, Jesper Dangaard Brouer wrote:
>
> > On Thu, 2012-08-09 at 22:08 +0200, kaber@trash.net wrote:
> >> From: Patrick McHardy <kaber@trash.net>
> >>
> >> The IPv6 conntrack fragmentation currently has a couple of shortcomings.
> >> Fragmentes are collected in PREROUTING/OUTPUT, are defragmented, the
> >> defragmented packet is then passed to conntrack, the resulting conntrack
> >> information is attached to each original fragment and the fragments then
> >> continue their way through the stack.
> >>
> >> Helper invocation occurs in the POSTROUTING hook, at which point only
> >> the original fragments are available. The result of this is that
> >> fragmented packets are never passed to helpers.
> >>
> >> This patch improves the situation in the following way:
> >>
> >> - If a reassembled packet belongs to a connection that has a helper
> >> assigned, the reassembled packet is passed through the stack instead
> >> of the original fragments.
> >
> > I'm working on IPv6 fragment handling for IPVS, and are taking advantage
> > of the "replay" by nf_ct_frag6_output() at hook prio -399
> > (NF_IP6_PRI_CONNTRACK_DEFRAG + 1).
> > By making a hook at NF_INET_PRE_ROUTING at prio -99 (NF_IP6_PRI_NAT_DST
> > + 1).
> >
> > I can see that the code path can be changed (with this patch), if a
> > helper is assigned. Then the "replay" starts at prio -199
> > (NF_IP6_PRI_CONNTRACK + 1), I guess I'm safe as I run at -99.
> >
> > I have tested that your patchset works, with my ipvs patches, but would
> > like the trigger the changed code path, to make sure.
> >
> > Could you provide an iptables command/rule, that trigger this code path?
>
> The easiest way is a large ping with the NAT patches also applied,
> in that case we also pass the first packet of a connection through
> the stack reassembled.
So, a fragmented IPv6 ICMPv6 packet, I assume?
Don't I need to load some of the helper modules, or just the
nf_conntrack_ipv6 module, or perhaps only nf_defrag_ipv6 ?
> >> @@ -199,9 +200,13 @@ static unsigned int ipv6_confirm(unsigned int hooknum,
> >> static unsigned int __ipv6_conntrack_in(struct net *net,
> >> unsigned int hooknum,
> >> struct sk_buff *skb,
> >> + const struct net_device *in,
> >> + const struct net_device *out,
> >> int (*okfn)(struct sk_buff *))
> >> {
> >> struct sk_buff *reasm = skb->nfct_reasm;
> >> + struct nf_conn *ct;
> >> + enum ip_conntrack_info ctinfo;
> >>
> >> /* This packet is fragmented and has reassembled packet. */
> >> if (reasm) {
> >> @@ -213,6 +218,20 @@ static unsigned int __ipv6_conntrack_in(struct net *net,
> >> if (ret != NF_ACCEPT)
> >> return ret;
> >> }
> >> +
> >> + /* Conntrack helpers need the entire reassembled packet in the
> >> + * POST_ROUTING hook.
> >> + */
> >> + ct = nf_ct_get(reasm, &ctinfo);
> >> + if (ct != NULL && test_bit(IPS_HELPER_BIT, &ct->status)) {
> >> + nf_conntrack_get_reasm(skb);
> >> + NF_HOOK_THRESH(NFPROTO_IPV6, hooknum, reasm,
> >> + (struct net_device *)in,
> >> + (struct net_device *)out,
> >> + okfn, NF_IP6_PRI_CONNTRACK + 1);
> >
> > Hook prio change to NF_IP6_PRI_CONNTRACK + 1
>
> I didn't get this part, you want to change to PRE_CONNTRACK + 1? What
> about raw and SELinux?
No - I don't want any changes.
I was just pointing out *where* the changes occur in your patch. This is
just a "service" to other email readers, so they can spot the changes
faster, I were referring to.
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Sr. Network Kernel Developer at Red Hat
Author of http://www.iptv-analyzer.org
LinkedIn: http://www.linkedin.com/in/brouer
^ permalink raw reply
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