* [PATCH 1/2] netfilter: Combine ipt_TTL and ip6t_HL source
2009-02-18 16:02 Combination patches, round 1 Jan Engelhardt
@ 2009-02-18 16:02 ` Jan Engelhardt
2009-02-18 17:39 ` Patrick McHardy
2009-02-18 16:02 ` [PATCH 2/2] netfilter: Combine ipt_ttl and ip6t_hl source Jan Engelhardt
1 sibling, 1 reply; 9+ messages in thread
From: Jan Engelhardt @ 2009-02-18 16:02 UTC (permalink / raw)
To: netfilter-devel; +Cc: kaber
Suggested by: James King <t.james.king@gmail.com>
Similarly to commit c9fd49680954714473d6cbd2546d6ff120f96840, merge
TTL and HL. Since HL does not depend on any IPv6-specific function,
no new module dependencies would arise.
With slight adjustments to the Kconfig help text.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
---
net/ipv4/netfilter/Kconfig | 15 ----
net/ipv4/netfilter/Makefile | 1 -
net/ipv4/netfilter/ipt_TTL.c | 97 ------------------------
net/ipv6/netfilter/Kconfig | 17 ----
net/ipv6/netfilter/Makefile | 1 -
net/ipv6/netfilter/ip6t_HL.c | 95 -----------------------
net/netfilter/Kconfig | 15 ++++
net/netfilter/Makefile | 1 +
net/netfilter/xt_HL.c | 171 ++++++++++++++++++++++++++++++++++++++++++
9 files changed, 187 insertions(+), 226 deletions(-)
delete mode 100644 net/ipv4/netfilter/ipt_TTL.c
delete mode 100644 net/ipv6/netfilter/ip6t_HL.c
create mode 100644 net/netfilter/xt_HL.c
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 3816e1d..3ad9f43 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -322,21 +322,6 @@ config IP_NF_TARGET_ECN
To compile it as a module, choose M here. If unsure, say N.
-config IP_NF_TARGET_TTL
- tristate 'TTL target support'
- depends on IP_NF_MANGLE
- depends on NETFILTER_ADVANCED
- help
- This option adds a `TTL' target, which enables the user to modify
- the TTL value of the IP header.
-
- While it is safe to decrement/lower the TTL, this target also enables
- functionality to increment and set the TTL value of the IP header to
- arbitrary values. This is EXTREMELY DANGEROUS since you can easily
- create immortal packets that loop forever on the network.
-
- To compile it as a module, choose M here. If unsure, say N.
-
# raw + specific targets
config IP_NF_RAW
tristate 'raw table support (required for NOTRACK/TRACE)'
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 5f9b650..20b0c37 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -61,7 +61,6 @@ obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o
obj-$(CONFIG_IP_NF_TARGET_NETMAP) += ipt_NETMAP.o
obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
-obj-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL.o
obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
# generic ARP tables
diff --git a/net/ipv4/netfilter/ipt_TTL.c b/net/ipv4/netfilter/ipt_TTL.c
deleted file mode 100644
index 6d76aae..0000000
--- a/net/ipv4/netfilter/ipt_TTL.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/* TTL modification target for IP tables
- * (C) 2000,2005 by Harald Welte <laforge@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.
- *
- */
-
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <net/checksum.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter_ipv4/ipt_TTL.h>
-
-MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
-MODULE_DESCRIPTION("Xtables: IPv4 TTL field modification target");
-MODULE_LICENSE("GPL");
-
-static unsigned int
-ttl_tg(struct sk_buff *skb, const struct xt_target_param *par)
-{
- struct iphdr *iph;
- const struct ipt_TTL_info *info = par->targinfo;
- int new_ttl;
-
- if (!skb_make_writable(skb, skb->len))
- return NF_DROP;
-
- iph = ip_hdr(skb);
-
- switch (info->mode) {
- case IPT_TTL_SET:
- new_ttl = info->ttl;
- break;
- case IPT_TTL_INC:
- new_ttl = iph->ttl + info->ttl;
- if (new_ttl > 255)
- new_ttl = 255;
- break;
- case IPT_TTL_DEC:
- new_ttl = iph->ttl - info->ttl;
- if (new_ttl < 0)
- new_ttl = 0;
- break;
- default:
- new_ttl = iph->ttl;
- break;
- }
-
- if (new_ttl != iph->ttl) {
- csum_replace2(&iph->check, htons(iph->ttl << 8),
- htons(new_ttl << 8));
- iph->ttl = new_ttl;
- }
-
- return XT_CONTINUE;
-}
-
-static bool ttl_tg_check(const struct xt_tgchk_param *par)
-{
- const struct ipt_TTL_info *info = par->targinfo;
-
- if (info->mode > IPT_TTL_MAXMODE) {
- printk(KERN_WARNING "ipt_TTL: invalid or unknown Mode %u\n",
- info->mode);
- return false;
- }
- if (info->mode != IPT_TTL_SET && info->ttl == 0)
- return false;
- return true;
-}
-
-static struct xt_target ttl_tg_reg __read_mostly = {
- .name = "TTL",
- .family = NFPROTO_IPV4,
- .target = ttl_tg,
- .targetsize = sizeof(struct ipt_TTL_info),
- .table = "mangle",
- .checkentry = ttl_tg_check,
- .me = THIS_MODULE,
-};
-
-static int __init ttl_tg_init(void)
-{
- return xt_register_target(&ttl_tg_reg);
-}
-
-static void __exit ttl_tg_exit(void)
-{
- xt_unregister_target(&ttl_tg_reg);
-}
-
-module_init(ttl_tg_init);
-module_exit(ttl_tg_exit);
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index 53ea512..6a42a96 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -170,23 +170,6 @@ config IP6_NF_MANGLE
To compile it as a module, choose M here. If unsure, say N.
-config IP6_NF_TARGET_HL
- tristate 'HL (hoplimit) target support'
- depends on IP6_NF_MANGLE
- depends on NETFILTER_ADVANCED
- help
- This option adds a `HL' target, which enables the user to decrement
- the hoplimit value of the IPv6 header or set it to a given (lower)
- value.
-
- While it is safe to decrement the hoplimit value, this option also
- enables functionality to increment and set the hoplimit value of the
- IPv6 header to arbitrary values. This is EXTREMELY DANGEROUS since
- you can easily create immortal packets that loop forever on the
- network.
-
- To compile it as a module, choose M here. If unsure, say N.
-
config IP6_NF_RAW
tristate 'raw table support (required for TRACE)'
depends on NETFILTER_ADVANCED
diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile
index 3f17c94..61a4570 100644
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -27,6 +27,5 @@ obj-$(CONFIG_IP6_NF_MATCH_OPTS) += ip6t_hbh.o
obj-$(CONFIG_IP6_NF_MATCH_RT) += ip6t_rt.o
# targets
-obj-$(CONFIG_IP6_NF_TARGET_HL) += ip6t_HL.o
obj-$(CONFIG_IP6_NF_TARGET_LOG) += ip6t_LOG.o
obj-$(CONFIG_IP6_NF_TARGET_REJECT) += ip6t_REJECT.o
diff --git a/net/ipv6/netfilter/ip6t_HL.c b/net/ipv6/netfilter/ip6t_HL.c
deleted file mode 100644
index 27b5adf..0000000
--- a/net/ipv6/netfilter/ip6t_HL.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * Hop Limit modification target for ip6tables
- * Maciej Soltysiak <solt@dns.toxicfilms.tv>
- * Based on HW's TTL module
- *
- * This software is distributed under the terms of GNU GPL
- */
-
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter_ipv6/ip6t_HL.h>
-
-MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
-MODULE_DESCRIPTION("Xtables: IPv6 Hop Limit field modification target");
-MODULE_LICENSE("GPL");
-
-static unsigned int
-hl_tg6(struct sk_buff *skb, const struct xt_target_param *par)
-{
- struct ipv6hdr *ip6h;
- const struct ip6t_HL_info *info = par->targinfo;
- int new_hl;
-
- if (!skb_make_writable(skb, skb->len))
- return NF_DROP;
-
- ip6h = ipv6_hdr(skb);
-
- switch (info->mode) {
- case IP6T_HL_SET:
- new_hl = info->hop_limit;
- break;
- case IP6T_HL_INC:
- new_hl = ip6h->hop_limit + info->hop_limit;
- if (new_hl > 255)
- new_hl = 255;
- break;
- case IP6T_HL_DEC:
- new_hl = ip6h->hop_limit - info->hop_limit;
- if (new_hl < 0)
- new_hl = 0;
- break;
- default:
- new_hl = ip6h->hop_limit;
- break;
- }
-
- ip6h->hop_limit = new_hl;
-
- return XT_CONTINUE;
-}
-
-static bool hl_tg6_check(const struct xt_tgchk_param *par)
-{
- const struct ip6t_HL_info *info = par->targinfo;
-
- if (info->mode > IP6T_HL_MAXMODE) {
- printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
- info->mode);
- return false;
- }
- if (info->mode != IP6T_HL_SET && info->hop_limit == 0) {
- printk(KERN_WARNING "ip6t_HL: increment/decrement doesn't "
- "make sense with value 0\n");
- return false;
- }
- return true;
-}
-
-static struct xt_target hl_tg6_reg __read_mostly = {
- .name = "HL",
- .family = NFPROTO_IPV6,
- .target = hl_tg6,
- .targetsize = sizeof(struct ip6t_HL_info),
- .table = "mangle",
- .checkentry = hl_tg6_check,
- .me = THIS_MODULE
-};
-
-static int __init hl_tg6_init(void)
-{
- return xt_register_target(&hl_tg6_reg);
-}
-
-static void __exit hl_tg6_exit(void)
-{
- xt_unregister_target(&hl_tg6_reg);
-}
-
-module_init(hl_tg6_init);
-module_exit(hl_tg6_exit);
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index c2bac9c..d99f29b 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -357,6 +357,21 @@ config NETFILTER_XT_TARGET_DSCP
To compile it as a module, choose M here. If unsure, say N.
+config NETFILTER_XT_TARGET_HL
+ tristate '"HL" hoplimit target support'
+ depends on IP_NF_MANGLE || IP6_NF_MANGLE
+ depends on NETFILTER_ADVANCED
+ ---help---
+ This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
+ targets, which enable the user to change the
+ hoplimit/time-to-live value of the IP header.
+
+ While it is safe to decrement the hoplimit/TTL value, the
+ modules also allow to increment and set the hoplimit value of
+ the header to arbitrary values. This is EXTREMELY DANGEROUS
+ since you can easily create immortal packets that loop
+ forever on the network.
+
config NETFILTER_XT_TARGET_MARK
tristate '"MARK" target support'
default m if NETFILTER_ADVANCED=n
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index da3d909..6ebe048 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CLASSIFY) += xt_CLASSIFY.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNMARK) += xt_CONNMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_HL) += xt_HL.o
obj-$(CONFIG_NETFILTER_XT_TARGET_MARK) += xt_MARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o
diff --git a/net/netfilter/xt_HL.c b/net/netfilter/xt_HL.c
new file mode 100644
index 0000000..10e789e
--- /dev/null
+++ b/net/netfilter/xt_HL.c
@@ -0,0 +1,171 @@
+/*
+ * TTL modification target for IP tables
+ * (C) 2000,2005 by Harald Welte <laforge@netfilter.org>
+ *
+ * Hop Limit modification target for ip6tables
+ * Maciej Soltysiak <solt@dns.toxicfilms.tv>
+ *
+ * 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/ip.h>
+#include <linux/ipv6.h>
+#include <net/checksum.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_ipv4/ipt_TTL.h>
+#include <linux/netfilter_ipv6/ip6t_HL.h>
+
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
+MODULE_DESCRIPTION("Xtables: Hoplimit/TTL Limit field modification target");
+MODULE_LICENSE("GPL");
+
+static unsigned int
+ttl_tg(struct sk_buff *skb, const struct xt_target_param *par)
+{
+ struct iphdr *iph;
+ const struct ipt_TTL_info *info = par->targinfo;
+ int new_ttl;
+
+ if (!skb_make_writable(skb, skb->len))
+ return NF_DROP;
+
+ iph = ip_hdr(skb);
+
+ switch (info->mode) {
+ case IPT_TTL_SET:
+ new_ttl = info->ttl;
+ break;
+ case IPT_TTL_INC:
+ new_ttl = iph->ttl + info->ttl;
+ if (new_ttl > 255)
+ new_ttl = 255;
+ break;
+ case IPT_TTL_DEC:
+ new_ttl = iph->ttl - info->ttl;
+ if (new_ttl < 0)
+ new_ttl = 0;
+ break;
+ default:
+ new_ttl = iph->ttl;
+ break;
+ }
+
+ if (new_ttl != iph->ttl) {
+ csum_replace2(&iph->check, htons(iph->ttl << 8),
+ htons(new_ttl << 8));
+ iph->ttl = new_ttl;
+ }
+
+ return XT_CONTINUE;
+}
+
+static unsigned int
+hl_tg6(struct sk_buff *skb, const struct xt_target_param *par)
+{
+ struct ipv6hdr *ip6h;
+ const struct ip6t_HL_info *info = par->targinfo;
+ int new_hl;
+
+ if (!skb_make_writable(skb, skb->len))
+ return NF_DROP;
+
+ ip6h = ipv6_hdr(skb);
+
+ switch (info->mode) {
+ case IP6T_HL_SET:
+ new_hl = info->hop_limit;
+ break;
+ case IP6T_HL_INC:
+ new_hl = ip6h->hop_limit + info->hop_limit;
+ if (new_hl > 255)
+ new_hl = 255;
+ break;
+ case IP6T_HL_DEC:
+ new_hl = ip6h->hop_limit - info->hop_limit;
+ if (new_hl < 0)
+ new_hl = 0;
+ break;
+ default:
+ new_hl = ip6h->hop_limit;
+ break;
+ }
+
+ ip6h->hop_limit = new_hl;
+
+ return XT_CONTINUE;
+}
+
+static bool ttl_tg_check(const struct xt_tgchk_param *par)
+{
+ const struct ipt_TTL_info *info = par->targinfo;
+
+ if (info->mode > IPT_TTL_MAXMODE) {
+ printk(KERN_WARNING "ipt_TTL: invalid or unknown Mode %u\n",
+ info->mode);
+ return false;
+ }
+ if (info->mode != IPT_TTL_SET && info->ttl == 0)
+ return false;
+ return true;
+}
+
+static bool hl_tg6_check(const struct xt_tgchk_param *par)
+{
+ const struct ip6t_HL_info *info = par->targinfo;
+
+ if (info->mode > IP6T_HL_MAXMODE) {
+ printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
+ info->mode);
+ return false;
+ }
+ if (info->mode != IP6T_HL_SET && info->hop_limit == 0) {
+ printk(KERN_WARNING "ip6t_HL: increment/decrement doesn't "
+ "make sense with value 0\n");
+ return false;
+ }
+ return true;
+}
+
+static struct xt_target hl_tg_reg[] __read_mostly = {
+ {
+ .name = "TTL",
+ .revision = 0,
+ .family = NFPROTO_IPV4,
+ .target = ttl_tg,
+ .targetsize = sizeof(struct ipt_TTL_info),
+ .table = "mangle",
+ .checkentry = ttl_tg_check,
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "HL",
+ .revision = 0,
+ .family = NFPROTO_IPV6,
+ .target = hl_tg6,
+ .targetsize = sizeof(struct ip6t_HL_info),
+ .table = "mangle",
+ .checkentry = hl_tg6_check,
+ .me = THIS_MODULE,
+ },
+};
+
+static int __init hl_tg_init(void)
+{
+ return xt_register_targets(hl_tg_reg, ARRAY_SIZE(hl_tg_reg));
+}
+
+static void __exit hl_tg_exit(void)
+{
+ xt_unregister_targets(hl_tg_reg, ARRAY_SIZE(hl_tg_reg));
+}
+
+module_init(hl_tg_init);
+module_exit(hl_tg_exit);
+MODULE_ALIAS("ipt_TTL");
+MODULE_ALIAS("ip6t_HL");
--
1.6.1.3
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH 2/2] netfilter: Combine ipt_ttl and ip6t_hl source
2009-02-18 16:02 Combination patches, round 1 Jan Engelhardt
2009-02-18 16:02 ` [PATCH 1/2] netfilter: Combine ipt_TTL and ip6t_HL source Jan Engelhardt
@ 2009-02-18 16:02 ` Jan Engelhardt
2009-02-18 17:40 ` Patrick McHardy
1 sibling, 1 reply; 9+ messages in thread
From: Jan Engelhardt @ 2009-02-18 16:02 UTC (permalink / raw)
To: netfilter-devel; +Cc: kaber
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
---
net/ipv4/netfilter/Kconfig | 9 ----
net/ipv4/netfilter/Makefile | 1 -
net/ipv4/netfilter/ipt_ttl.c | 63 ------------------------
net/ipv6/netfilter/Kconfig | 9 ----
net/ipv6/netfilter/Makefile | 1 -
net/ipv6/netfilter/ip6t_hl.c | 68 --------------------------
net/netfilter/Kconfig | 8 +++
net/netfilter/Makefile | 1 +
net/netfilter/xt_hl.c | 108 ++++++++++++++++++++++++++++++++++++++++++
9 files changed, 117 insertions(+), 151 deletions(-)
delete mode 100644 net/ipv4/netfilter/ipt_ttl.c
delete mode 100644 net/ipv6/netfilter/ip6t_hl.c
create mode 100644 net/netfilter/xt_hl.c
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 3ad9f43..40ad41f 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -92,15 +92,6 @@ config IP_NF_MATCH_ECN
To compile it as a module, choose M here. If unsure, say N.
-config IP_NF_MATCH_TTL
- tristate '"ttl" match support'
- depends on NETFILTER_ADVANCED
- help
- This adds CONFIG_IP_NF_MATCH_TTL option, which enabled the user
- to match packets by their TTL value.
-
- To compile it as a module, choose M here. If unsure, say N.
-
# `filter', generic and specific targets
config IP_NF_FILTER
tristate "Packet filtering"
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 20b0c37..4811159 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -51,7 +51,6 @@ obj-$(CONFIG_IP_NF_SECURITY) += iptable_security.o
obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o
-obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
# targets
obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
diff --git a/net/ipv4/netfilter/ipt_ttl.c b/net/ipv4/netfilter/ipt_ttl.c
deleted file mode 100644
index 297f1cb..0000000
--- a/net/ipv4/netfilter/ipt_ttl.c
+++ /dev/null
@@ -1,63 +0,0 @@
-/* IP tables module for matching the value of the TTL
- *
- * (C) 2000,2001 by Harald Welte <laforge@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.
- */
-
-#include <linux/ip.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-
-#include <linux/netfilter_ipv4/ipt_ttl.h>
-#include <linux/netfilter/x_tables.h>
-
-MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
-MODULE_DESCRIPTION("Xtables: IPv4 TTL field match");
-MODULE_LICENSE("GPL");
-
-static bool ttl_mt(const struct sk_buff *skb, const struct xt_match_param *par)
-{
- const struct ipt_ttl_info *info = par->matchinfo;
- const u8 ttl = ip_hdr(skb)->ttl;
-
- switch (info->mode) {
- case IPT_TTL_EQ:
- return ttl == info->ttl;
- case IPT_TTL_NE:
- return ttl != info->ttl;
- case IPT_TTL_LT:
- return ttl < info->ttl;
- case IPT_TTL_GT:
- return ttl > info->ttl;
- default:
- printk(KERN_WARNING "ipt_ttl: unknown mode %d\n",
- info->mode);
- return false;
- }
-
- return false;
-}
-
-static struct xt_match ttl_mt_reg __read_mostly = {
- .name = "ttl",
- .family = NFPROTO_IPV4,
- .match = ttl_mt,
- .matchsize = sizeof(struct ipt_ttl_info),
- .me = THIS_MODULE,
-};
-
-static int __init ttl_mt_init(void)
-{
- return xt_register_match(&ttl_mt_reg);
-}
-
-static void __exit ttl_mt_exit(void)
-{
- xt_unregister_match(&ttl_mt_reg);
-}
-
-module_init(ttl_mt_init);
-module_exit(ttl_mt_exit);
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index 6a42a96..4a8d7ec 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -94,15 +94,6 @@ config IP6_NF_MATCH_OPTS
To compile it as a module, choose M here. If unsure, say N.
-config IP6_NF_MATCH_HL
- tristate '"hl" match support'
- depends on NETFILTER_ADVANCED
- help
- HL matching allows you to match packets based on the hop
- limit of the packet.
-
- To compile it as a module, choose M here. If unsure, say N.
-
config IP6_NF_MATCH_IPV6HEADER
tristate '"ipv6header" IPv6 Extension Headers Match'
default m if NETFILTER_ADVANCED=n
diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile
index 61a4570..aafbba3 100644
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -20,7 +20,6 @@ obj-$(CONFIG_NF_CONNTRACK_IPV6) += nf_conntrack_ipv6.o
obj-$(CONFIG_IP6_NF_MATCH_AH) += ip6t_ah.o
obj-$(CONFIG_IP6_NF_MATCH_EUI64) += ip6t_eui64.o
obj-$(CONFIG_IP6_NF_MATCH_FRAG) += ip6t_frag.o
-obj-$(CONFIG_IP6_NF_MATCH_HL) += ip6t_hl.o
obj-$(CONFIG_IP6_NF_MATCH_IPV6HEADER) += ip6t_ipv6header.o
obj-$(CONFIG_IP6_NF_MATCH_MH) += ip6t_mh.o
obj-$(CONFIG_IP6_NF_MATCH_OPTS) += ip6t_hbh.o
diff --git a/net/ipv6/netfilter/ip6t_hl.c b/net/ipv6/netfilter/ip6t_hl.c
deleted file mode 100644
index c964dca..0000000
--- a/net/ipv6/netfilter/ip6t_hl.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/* Hop Limit matching module */
-
-/* (C) 2001-2002 Maciej Soltysiak <solt@dns.toxicfilms.tv>
- * Based on HW's ttl module
- *
- * 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/ipv6.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-
-#include <linux/netfilter_ipv6/ip6t_hl.h>
-#include <linux/netfilter/x_tables.h>
-
-MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
-MODULE_DESCRIPTION("Xtables: IPv6 Hop Limit field match");
-MODULE_LICENSE("GPL");
-
-static bool hl_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
-{
- const struct ip6t_hl_info *info = par->matchinfo;
- const struct ipv6hdr *ip6h = ipv6_hdr(skb);
-
- switch (info->mode) {
- case IP6T_HL_EQ:
- return ip6h->hop_limit == info->hop_limit;
- break;
- case IP6T_HL_NE:
- return ip6h->hop_limit != info->hop_limit;
- break;
- case IP6T_HL_LT:
- return ip6h->hop_limit < info->hop_limit;
- break;
- case IP6T_HL_GT:
- return ip6h->hop_limit > info->hop_limit;
- break;
- default:
- printk(KERN_WARNING "ip6t_hl: unknown mode %d\n",
- info->mode);
- return false;
- }
-
- return false;
-}
-
-static struct xt_match hl_mt6_reg __read_mostly = {
- .name = "hl",
- .family = NFPROTO_IPV6,
- .match = hl_mt6,
- .matchsize = sizeof(struct ip6t_hl_info),
- .me = THIS_MODULE,
-};
-
-static int __init hl_mt6_init(void)
-{
- return xt_register_match(&hl_mt6_reg);
-}
-
-static void __exit hl_mt6_exit(void)
-{
- xt_unregister_match(&hl_mt6_reg);
-}
-
-module_init(hl_mt6_init);
-module_exit(hl_mt6_exit);
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index d99f29b..0eb98b4 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -620,6 +620,14 @@ config NETFILTER_XT_MATCH_HELPER
To compile it as a module, choose M here. If unsure, say Y.
+config NETFILTER_XT_MATCH_HL
+ tristate '"hl" hoplimit/TTL match support'
+ depends on NETFILTER_ADVANCED
+ ---help---
+ HL matching allows you to match packets based on the hoplimit
+ in the IPv6 header, or the time-to-live field in the IPv4
+ header of the packet.
+
config NETFILTER_XT_MATCH_IPRANGE
tristate '"iprange" address range match support'
depends on NETFILTER_ADVANCED
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 6ebe048..da73ed2 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -68,6 +68,7 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_DSCP) += xt_dscp.o
obj-$(CONFIG_NETFILTER_XT_MATCH_ESP) += xt_esp.o
obj-$(CONFIG_NETFILTER_XT_MATCH_HASHLIMIT) += xt_hashlimit.o
obj-$(CONFIG_NETFILTER_XT_MATCH_HELPER) += xt_helper.o
+obj-$(CONFIG_NETFILTER_XT_MATCH_HL) += xt_hl.o
obj-$(CONFIG_NETFILTER_XT_MATCH_IPRANGE) += xt_iprange.o
obj-$(CONFIG_NETFILTER_XT_MATCH_LENGTH) += xt_length.o
obj-$(CONFIG_NETFILTER_XT_MATCH_LIMIT) += xt_limit.o
diff --git a/net/netfilter/xt_hl.c b/net/netfilter/xt_hl.c
new file mode 100644
index 0000000..7726154
--- /dev/null
+++ b/net/netfilter/xt_hl.c
@@ -0,0 +1,108 @@
+/*
+ * IP tables module for matching the value of the TTL
+ * (C) 2000,2001 by Harald Welte <laforge@netfilter.org>
+ *
+ * Hop Limit matching module
+ * (C) 2001-2002 Maciej Soltysiak <solt@dns.toxicfilms.tv>
+ *
+ * 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/ip.h>
+#include <linux/ipv6.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_ipv4/ipt_ttl.h>
+#include <linux/netfilter_ipv6/ip6t_hl.h>
+
+MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
+MODULE_DESCRIPTION("Xtables: Hoplimit/TTL field match");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_ttl");
+MODULE_ALIAS("ip6t_hl");
+
+static bool ttl_mt(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+ const struct ipt_ttl_info *info = par->matchinfo;
+ const u8 ttl = ip_hdr(skb)->ttl;
+
+ switch (info->mode) {
+ case IPT_TTL_EQ:
+ return ttl == info->ttl;
+ case IPT_TTL_NE:
+ return ttl != info->ttl;
+ case IPT_TTL_LT:
+ return ttl < info->ttl;
+ case IPT_TTL_GT:
+ return ttl > info->ttl;
+ default:
+ printk(KERN_WARNING "ipt_ttl: unknown mode %d\n",
+ info->mode);
+ return false;
+ }
+
+ return false;
+}
+
+static bool hl_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+ const struct ip6t_hl_info *info = par->matchinfo;
+ const struct ipv6hdr *ip6h = ipv6_hdr(skb);
+
+ switch (info->mode) {
+ case IP6T_HL_EQ:
+ return ip6h->hop_limit == info->hop_limit;
+ break;
+ case IP6T_HL_NE:
+ return ip6h->hop_limit != info->hop_limit;
+ break;
+ case IP6T_HL_LT:
+ return ip6h->hop_limit < info->hop_limit;
+ break;
+ case IP6T_HL_GT:
+ return ip6h->hop_limit > info->hop_limit;
+ break;
+ default:
+ printk(KERN_WARNING "ip6t_hl: unknown mode %d\n",
+ info->mode);
+ return false;
+ }
+
+ return false;
+}
+
+static struct xt_match hl_mt_reg[] __read_mostly = {
+ {
+ .name = "ttl",
+ .revision = 0,
+ .family = NFPROTO_IPV4,
+ .match = ttl_mt,
+ .matchsize = sizeof(struct ipt_ttl_info),
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "hl",
+ .revision = 0,
+ .family = NFPROTO_IPV6,
+ .match = hl_mt6,
+ .matchsize = sizeof(struct ip6t_hl_info),
+ .me = THIS_MODULE,
+ },
+};
+
+static int __init hl_mt_init(void)
+{
+ return xt_register_matches(hl_mt_reg, ARRAY_SIZE(hl_mt_reg));
+}
+
+static void __exit hl_mt_exit(void)
+{
+ xt_unregister_matches(hl_mt_reg, ARRAY_SIZE(hl_mt_reg));
+}
+
+module_init(hl_mt_init);
+module_exit(hl_mt_exit);
--
1.6.1.3
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