* [PATCH V3 5/8] ipvs: Fix faulty IPv6 extension header handling in IPVS
2012-09-11 12:36 [PATCH V3 0/8] ipvs: IPv6 fragment handling for IPVS Jesper Dangaard Brouer
` (3 preceding siblings ...)
2012-09-11 12:37 ` [PATCH V3 4/8] ipvs: Fix bug in IPv6 NAT mangling of ports inside ICMPv6 packets Jesper Dangaard Brouer
@ 2012-09-11 12:37 ` Jesper Dangaard Brouer
2012-09-11 12:38 ` [PATCH V3 6/8] ipvs: Complete IPv6 fragment handling for IPVS Jesper Dangaard Brouer
` (3 subsequent siblings)
8 siblings, 0 replies; 12+ messages in thread
From: Jesper Dangaard Brouer @ 2012-09-11 12:37 UTC (permalink / raw)
To: Hans Schillstrom, Hans Schillstrom, netdev, Patrick McHardy,
Pablo Neira Ayuso, lvs-devel, Julian Anastasov
Cc: Jesper Dangaard Brouer, Thomas Graf, Wensong Zhang,
netfilter-devel, Simon Horman
IPv6 packets can contain extension headers, thus its wrong to assume
that the transport/upper-layer header, starts right after (struct
ipv6hdr) the IPv6 header. IPVS uses this false assumption, and will
write SNAT & DNAT modifications at a fixed pos which will corrupt the
message.
To fix this, proper header position must be found before modifying
packets. Introducing ip_vs_fill_iph_skb(), which uses ipv6_find_hdr()
to skip the exthdrs. It finds (1) the transport header offset, (2) the
protocol, and (3) detects if the packet is a fragment.
Note, that fragments in IPv6 is represented via an exthdr. Thus, this
is detected while skipping through the exthdrs.
This patch depends on commit 84018f55a:
"netfilter: ip6_tables: add flags parameter to ipv6_find_hdr()"
This also adds a dependency to ip6_tables.
Originally based on patch from: Hans Schillstrom
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
---
V3:
- No big API changes (these are postpone to later patch)
- Make ip_vs_in_icmp_v6() easier to review, avoid spliting related
changes across patches.
- Fix port write offset bug in ip_vs_in_icmp_v6()
- Move ip_vs_pe_sip.c changes to a seperate patch.
V2:
- Use macro IS_ENABLED(CONFIG_XXX)
- Re-add NULL pointer check in ip_vs_out_icmp_v6()
include/net/ip_vs.h | 72 +++++++++++-
net/netfilter/ipvs/Kconfig | 1
net/netfilter/ipvs/ip_vs_core.c | 191 +++++++++++++++------------------
net/netfilter/ipvs/ip_vs_dh.c | 2
net/netfilter/ipvs/ip_vs_lblc.c | 2
net/netfilter/ipvs/ip_vs_lblcr.c | 2
net/netfilter/ipvs/ip_vs_pe_sip.c | 2
net/netfilter/ipvs/ip_vs_proto_sctp.c | 22 ++--
net/netfilter/ipvs/ip_vs_proto_tcp.c | 22 ++--
net/netfilter/ipvs/ip_vs_proto_udp.c | 22 ++--
net/netfilter/ipvs/ip_vs_sh.c | 2
net/netfilter/ipvs/ip_vs_xmit.c | 5 +
net/netfilter/xt_ipvs.c | 2
13 files changed, 198 insertions(+), 149 deletions(-)
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index c8b2bdb..29265bf 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -22,6 +22,9 @@
#include <linux/ip.h>
#include <linux/ipv6.h> /* for struct ipv6hdr */
#include <net/ipv6.h>
+#if IS_ENABLED(CONFIG_IPV6)
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#endif
#if IS_ENABLED(CONFIG_NF_CONNTRACK)
#include <net/netfilter/nf_conntrack.h>
#endif
@@ -103,30 +106,79 @@ static inline struct net *seq_file_single_net(struct seq_file *seq)
/* Connections' size value needed by ip_vs_ctl.c */
extern int ip_vs_conn_tab_size;
-
struct ip_vs_iphdr {
- int len;
- __u8 protocol;
+ __u32 len; /* IPv4 simply where L4 starts
+ IPv6 where L4 Transport Header starts */
+ __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/
+ __s16 protocol;
+ __s32 flags;
union nf_inet_addr saddr;
union nf_inet_addr daddr;
};
static inline void
-ip_vs_fill_iphdr(int af, const void *nh, struct ip_vs_iphdr *iphdr)
+ip_vs_fill_ip4hdr(const void *nh, struct ip_vs_iphdr *iphdr)
+{
+ const struct iphdr *iph = nh;
+
+ iphdr->len = iph->ihl * 4;
+ iphdr->fragoffs = 0;
+ iphdr->protocol = iph->protocol;
+ iphdr->saddr.ip = iph->saddr;
+ iphdr->daddr.ip = iph->daddr;
+}
+
+/* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6.
+ * IPv6 requires some extra work, as finding proper header position,
+ * depend on the IPv6 extension headers.
+ */
+static inline void
+ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, struct ip_vs_iphdr *iphdr)
{
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6) {
- const struct ipv6hdr *iph = nh;
- iphdr->len = sizeof(struct ipv6hdr);
- iphdr->protocol = iph->nexthdr;
+ const struct ipv6hdr *iph =
+ (struct ipv6hdr *)skb_network_header(skb);
iphdr->saddr.in6 = iph->saddr;
iphdr->daddr.in6 = iph->daddr;
+ /* ipv6_find_hdr() updates len, flags */
+ iphdr->len = 0;
+ iphdr->flags = 0;
+ iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1,
+ &iphdr->fragoffs,
+ &iphdr->flags);
} else
#endif
{
- const struct iphdr *iph = nh;
- iphdr->len = iph->ihl * 4;
- iphdr->protocol = iph->protocol;
+ const struct iphdr *iph =
+ (struct iphdr *)skb_network_header(skb);
+ iphdr->len = iph->ihl * 4;
+ iphdr->fragoffs = 0;
+ iphdr->protocol = iph->protocol;
+ iphdr->saddr.ip = iph->saddr;
+ iphdr->daddr.ip = iph->daddr;
+ }
+}
+
+/* This function is a faster version of ip_vs_fill_iph_skb().
+ * Where we only populate {s,d}addr (and avoid calling ipv6_find_hdr()).
+ * This is used by the some of the ip_vs_*_schedule() functions.
+ * (Mostly done to avoid ABI breakage of external schedulers)
+ */
+static inline void
+ip_vs_fill_iph_addr_only(int af, const struct sk_buff *skb,
+ struct ip_vs_iphdr *iphdr)
+{
+#ifdef CONFIG_IP_VS_IPV6
+ if (af == AF_INET6) {
+ const struct ipv6hdr *iph =
+ (struct ipv6hdr *)skb_network_header(skb);
+ iphdr->saddr.in6 = iph->saddr;
+ iphdr->daddr.in6 = iph->daddr;
+ } else {
+#endif
+ const struct iphdr *iph =
+ (struct iphdr *)skb_network_header(skb);
iphdr->saddr.ip = iph->saddr;
iphdr->daddr.ip = iph->daddr;
}
diff --git a/net/netfilter/ipvs/Kconfig b/net/netfilter/ipvs/Kconfig
index 8b2cffd..a97ae53 100644
--- a/net/netfilter/ipvs/Kconfig
+++ b/net/netfilter/ipvs/Kconfig
@@ -28,6 +28,7 @@ if IP_VS
config IP_VS_IPV6
bool "IPv6 support for IPVS"
depends on IPV6 = y || IP_VS = IPV6
+ select IP6_NF_IPTABLES
---help---
Add IPv6 support to IPVS. This is incomplete and might be dangerous.
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index fd50f47..caed44d 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -236,7 +236,7 @@ ip_vs_sched_persist(struct ip_vs_service *svc,
union nf_inet_addr snet; /* source network of the client,
after masking */
- ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(svc->af, skb, &iph);
/* Mask saddr with the netmask to adjust template granularity */
#ifdef CONFIG_IP_VS_IPV6
@@ -402,7 +402,7 @@ ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
unsigned int flags;
*ignored = 1;
- ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(svc->af, skb, &iph);
pptr = skb_header_pointer(skb, iph.len, sizeof(_ports), _ports);
if (pptr == NULL)
return NULL;
@@ -506,7 +506,7 @@ int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
int unicast;
#endif
- ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(svc->af, skb, &iph);
pptr = skb_header_pointer(skb, iph.len, sizeof(_ports), _ports);
if (pptr == NULL) {
@@ -732,15 +732,21 @@ void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp,
struct ip_vs_conn *cp, int inout)
{
struct ipv6hdr *iph = ipv6_hdr(skb);
- unsigned int icmp_offset = sizeof(struct ipv6hdr);
- struct icmp6hdr *icmph = (struct icmp6hdr *)(skb_network_header(skb) +
- icmp_offset);
- struct ipv6hdr *ciph = (struct ipv6hdr *)(icmph + 1);
+ unsigned int icmp_offset = 0;
+ unsigned int offs = 0; /* header offset*/
+ int protocol;
+ struct icmp6hdr *icmph;
+ struct ipv6hdr *ciph;
+ unsigned short fragoffs;
+
+ ipv6_find_hdr(skb, &icmp_offset, IPPROTO_ICMPV6, &fragoffs, NULL);
+ icmph = (struct icmp6hdr *)(skb_network_header(skb) + icmp_offset);
+ offs = icmp_offset + sizeof(struct icmp6hdr);
+ ciph = (struct ipv6hdr *)(skb_network_header(skb) + offs);
+
+ protocol = ipv6_find_hdr(skb, &offs, -1, &fragoffs, NULL);
- /* Make sure SKB is writable */
- unsigned int write;
- write = icmp_offset + sizeof(struct icmp6hdr) + sizeof(struct ipv6hdr);
- if (!skb_make_writable(skb, write + 2 * sizeof(__u16)))
+ if (!skb_make_writable(skb, offs + 2 * sizeof(__u16)))
return;
if (inout) {
@@ -752,10 +758,13 @@ void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp,
}
/* the TCP/UDP/SCTP port */
- if (IPPROTO_TCP == ciph->nexthdr || IPPROTO_UDP == ciph->nexthdr ||
- IPPROTO_SCTP == ciph->nexthdr) {
- __be16 *ports = (void *)ciph + sizeof(struct ipv6hdr);
+ if (!fragoffs && (IPPROTO_TCP == protocol || IPPROTO_UDP == protocol ||
+ IPPROTO_SCTP == protocol)) {
+ __be16 *ports = (void *)(skb_network_header(skb) + offs);
+ IP_VS_DBG(11, "%s() changed port %d to %d\n", __func__,
+ ntohs(inout ? ports[1] : ports[0]),
+ ntohs(inout ? cp->vport : cp->dport));
if (inout)
ports[1] = cp->vport;
else
@@ -904,9 +913,8 @@ static int ip_vs_out_icmp(struct sk_buff *skb, int *related,
IP_VS_DBG_PKT(11, AF_INET, pp, skb, offset,
"Checking outgoing ICMP for");
- offset += cih->ihl * 4;
-
- ip_vs_fill_iphdr(AF_INET, cih, &ciph);
+ ip_vs_fill_ip4hdr(cih, &ciph);
+ ciph.len += offset;
/* The embedded headers contain source and dest in reverse order */
cp = pp->conn_out_get(AF_INET, skb, &ciph, offset, 1);
if (!cp)
@@ -914,40 +922,33 @@ static int ip_vs_out_icmp(struct sk_buff *skb, int *related,
snet.ip = iph->saddr;
return handle_response_icmp(AF_INET, skb, &snet, cih->protocol, cp,
- pp, offset, ihl);
+ pp, ciph.len, ihl);
}
#ifdef CONFIG_IP_VS_IPV6
static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related,
unsigned int hooknum)
{
- struct ipv6hdr *iph;
struct icmp6hdr _icmph, *ic;
- struct ipv6hdr _ciph, *cih; /* The ip header contained
+ struct ipv6hdr _ip6, *ip6; /* The ip header contained
within the ICMP */
- struct ip_vs_iphdr ciph;
struct ip_vs_conn *cp;
struct ip_vs_protocol *pp;
- unsigned int offset;
union nf_inet_addr snet;
- *related = 1;
+ struct ip_vs_iphdr ipvsh_stack;
+ struct ip_vs_iphdr *ipvsh = &ipvsh_stack;
+ ip_vs_fill_iph_skb(AF_INET6, skb, ipvsh);
- /* reassemble IP fragments */
- if (ipv6_hdr(skb)->nexthdr == IPPROTO_FRAGMENT) {
- if (ip_vs_gather_frags_v6(skb, ip_vs_defrag_user(hooknum)))
- return NF_STOLEN;
- }
+ *related = 1;
- iph = ipv6_hdr(skb);
- offset = sizeof(struct ipv6hdr);
- ic = skb_header_pointer(skb, offset, sizeof(_icmph), &_icmph);
+ ic = skb_header_pointer(skb, ipvsh->len, sizeof(_icmph), &_icmph);
if (ic == NULL)
return NF_DROP;
- IP_VS_DBG(12, "Outgoing ICMPv6 (%d,%d) %pI6->%pI6\n",
+ IP_VS_DBG(12, "Outgoing ICMPv6 (%d,%d) %pI6c->%pI6c\n",
ic->icmp6_type, ntohs(icmpv6_id(ic)),
- &iph->saddr, &iph->daddr);
+ &ipvsh->saddr, &ipvsh->daddr);
/*
* Work through seeing if this is for us.
@@ -962,34 +963,28 @@ static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related,
}
/* Now find the contained IP header */
- offset += sizeof(_icmph);
- cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph);
- if (cih == NULL)
+ ipvsh->len += sizeof(_icmph);
+ ip6 = skb_header_pointer(skb, ipvsh->len, sizeof(_ip6), &_ip6);
+ if (ip6 == NULL)
return NF_ACCEPT; /* The packet looks wrong, ignore */
+ ipvsh->protocol = ipv6_find_hdr(skb, &ipvsh->len, -1,
+ &ipvsh->fragoffs, &ipvsh->flags);
- pp = ip_vs_proto_get(cih->nexthdr);
- if (!pp)
- return NF_ACCEPT;
-
- /* Is the embedded protocol header present? */
- /* TODO: we don't support fragmentation at the moment anyways */
- if (unlikely(cih->nexthdr == IPPROTO_FRAGMENT && pp->dont_defrag))
+ pp = ip_vs_proto_get(ipvsh->protocol);
+ if (!pp || (ipvsh->protocol < 0))
return NF_ACCEPT;
+ /* fill the rest of ipvsh */
+ ipvsh->saddr.in6 = ip6->saddr;
+ ipvsh->daddr.in6 = ip6->daddr;
- IP_VS_DBG_PKT(11, AF_INET6, pp, skb, offset,
- "Checking outgoing ICMPv6 for");
-
- offset += sizeof(struct ipv6hdr);
-
- ip_vs_fill_iphdr(AF_INET6, cih, &ciph);
/* The embedded headers contain source and dest in reverse order */
- cp = pp->conn_out_get(AF_INET6, skb, &ciph, offset, 1);
+ cp = pp->conn_out_get(AF_INET6, skb, ipvsh, ipvsh->len, 1);
if (!cp)
return NF_ACCEPT;
- snet.in6 = iph->saddr;
- return handle_response_icmp(AF_INET6, skb, &snet, cih->nexthdr, cp,
- pp, offset, sizeof(struct ipv6hdr));
+ snet.in6 = ipvsh->saddr.in6;
+ return handle_response_icmp(AF_INET6, skb, &snet, ipvsh->protocol, cp,
+ pp, ipvsh->len, sizeof(struct ipv6hdr));
}
#endif
@@ -1119,7 +1114,7 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
if (!net_ipvs(net)->enable)
return NF_ACCEPT;
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(af, skb, &iph);
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6) {
if (unlikely(iph.protocol == IPPROTO_ICMPV6)) {
@@ -1129,7 +1124,7 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
if (related)
return verdict;
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(af, skb, &iph);
}
} else
#endif
@@ -1139,7 +1134,7 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
if (related)
return verdict;
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ ip_vs_fill_ip4hdr(skb_network_header(skb), &iph);
}
pd = ip_vs_proto_data_get(net, iph.protocol);
@@ -1149,22 +1144,14 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
/* reassemble IP fragments */
#ifdef CONFIG_IP_VS_IPV6
- if (af == AF_INET6) {
- if (ipv6_hdr(skb)->nexthdr == IPPROTO_FRAGMENT) {
- if (ip_vs_gather_frags_v6(skb,
- ip_vs_defrag_user(hooknum)))
- return NF_STOLEN;
- }
-
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
- } else
+ if (af == AF_INET)
#endif
if (unlikely(ip_is_fragment(ip_hdr(skb)) && !pp->dont_defrag)) {
if (ip_vs_gather_frags(skb,
ip_vs_defrag_user(hooknum)))
return NF_STOLEN;
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ ip_vs_fill_ip4hdr(skb_network_header(skb), &iph);
}
/*
@@ -1379,9 +1366,9 @@ ip_vs_in_icmp(struct sk_buff *skb, int *related, unsigned int hooknum)
"Checking incoming ICMP for");
offset2 = offset;
- offset += cih->ihl * 4;
-
- ip_vs_fill_iphdr(AF_INET, cih, &ciph);
+ ip_vs_fill_ip4hdr(cih, &ciph);
+ ciph.len += offset;
+ offset = ciph.len;
/* The embedded headers contain source and dest in reverse order.
* For IPIP this is error for request, not for reply.
*/
@@ -1467,27 +1454,21 @@ static int
ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum)
{
struct net *net = NULL;
- struct ipv6hdr *iph;
+ struct ipv6hdr _ip6h, *ip6h;
struct icmp6hdr _icmph, *ic;
- struct ipv6hdr _ciph, *cih; /* The ip header contained
- within the ICMP */
struct ip_vs_iphdr ciph;
struct ip_vs_conn *cp;
struct ip_vs_protocol *pp;
struct ip_vs_proto_data *pd;
- unsigned int offset, verdict;
+ unsigned int offs_ciph, verdict;
- *related = 1;
+ struct ip_vs_iphdr iph_stack;
+ struct ip_vs_iphdr *iph = &iph_stack;
+ ip_vs_fill_iph_skb(AF_INET6, skb, iph);
- /* reassemble IP fragments */
- if (ipv6_hdr(skb)->nexthdr == IPPROTO_FRAGMENT) {
- if (ip_vs_gather_frags_v6(skb, ip_vs_defrag_user(hooknum)))
- return NF_STOLEN;
- }
+ *related = 1;
- iph = ipv6_hdr(skb);
- offset = sizeof(struct ipv6hdr);
- ic = skb_header_pointer(skb, offset, sizeof(_icmph), &_icmph);
+ ic = skb_header_pointer(skb, iph->len, sizeof(_icmph), &_icmph);
if (ic == NULL)
return NF_DROP;
@@ -1508,39 +1489,40 @@ ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum)
}
/* Now find the contained IP header */
- offset += sizeof(_icmph);
- cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph);
- if (cih == NULL)
+ ciph.len = iph->len + sizeof(_icmph);
+ offs_ciph = ciph.len; /* Save ip header offset */
+ ip6h = skb_header_pointer(skb, ciph.len, sizeof(_ip6h), (void *)&_ip6h);
+ if (ip6h == NULL)
return NF_ACCEPT; /* The packet looks wrong, ignore */
+ ciph.protocol = ipv6_find_hdr(skb, &ciph.len, -1, &ciph.fragoffs, NULL);
+ ciph.saddr.in6 = ip6h->saddr; /* conn_in_get() handles reverse order */
+ ciph.daddr.in6 = ip6h->daddr;
net = skb_net(skb);
- pd = ip_vs_proto_data_get(net, cih->nexthdr);
+ pd = ip_vs_proto_data_get(net, ciph.protocol);
if (!pd)
return NF_ACCEPT;
pp = pd->pp;
- /* Is the embedded protocol header present? */
- /* TODO: we don't support fragmentation at the moment anyways */
- if (unlikely(cih->nexthdr == IPPROTO_FRAGMENT && pp->dont_defrag))
+ /* Cannot handle fragmented embedded protocol */
+ if (ciph.fragoffs)
return NF_ACCEPT;
- IP_VS_DBG_PKT(11, AF_INET6, pp, skb, offset,
+ IP_VS_DBG_PKT(11, AF_INET6, pp, skb, offs_ciph,
"Checking incoming ICMPv6 for");
- offset += sizeof(struct ipv6hdr);
-
- ip_vs_fill_iphdr(AF_INET6, cih, &ciph);
/* The embedded headers contain source and dest in reverse order */
- cp = pp->conn_in_get(AF_INET6, skb, &ciph, offset, 1);
+ cp = pp->conn_in_get(AF_INET6, skb, &ciph, ciph.len, 1);
if (!cp)
return NF_ACCEPT;
/* do the statistics and put it back */
ip_vs_in_stats(cp, skb);
- if (IPPROTO_TCP == cih->nexthdr || IPPROTO_UDP == cih->nexthdr ||
- IPPROTO_SCTP == cih->nexthdr)
- offset += 2 * sizeof(__u16);
- verdict = ip_vs_icmp_xmit_v6(skb, cp, pp, offset, hooknum);
+ if (IPPROTO_TCP == ciph.protocol || IPPROTO_UDP == ciph.protocol ||
+ IPPROTO_SCTP == ciph.protocol)
+ offs_ciph = ciph.len + (2 * sizeof(__u16));
+
+ verdict = ip_vs_icmp_xmit_v6(skb, cp, pp, offs_ciph, hooknum);
__ip_vs_conn_put(cp);
@@ -1576,7 +1558,7 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
if (unlikely((skb->pkt_type != PACKET_HOST &&
hooknum != NF_INET_LOCAL_OUT) ||
!skb_dst(skb))) {
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(af, skb, &iph);
IP_VS_DBG_BUF(12, "packet type=%d proto=%d daddr=%s"
" ignored in hook %u\n",
skb->pkt_type, iph.protocol,
@@ -1588,7 +1570,7 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
if (!net_ipvs(net)->enable)
return NF_ACCEPT;
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(af, skb, &iph);
/* Bad... Do not break raw sockets */
if (unlikely(skb->sk != NULL && hooknum == NF_INET_LOCAL_OUT &&
@@ -1608,7 +1590,6 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
if (related)
return verdict;
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
}
} else
#endif
@@ -1618,7 +1599,6 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
if (related)
return verdict;
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
}
/* Protocol supported? */
@@ -1628,10 +1608,11 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
pp = pd->pp;
/*
* Check if the packet belongs to an existing connection entry
+ * Only sched first IPv6 fragment.
*/
cp = pp->conn_in_get(af, skb, &iph, iph.len, 0);
- if (unlikely(!cp)) {
+ if (unlikely(!cp) && !iph.fragoffs) {
int v;
if (!pp->conn_schedule(af, skb, pd, &v, &cp))
@@ -1795,8 +1776,10 @@ ip_vs_forward_icmp_v6(unsigned int hooknum, struct sk_buff *skb,
{
int r;
struct net *net;
+ struct ip_vs_iphdr iphdr;
- if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6)
+ ip_vs_fill_iph_skb(AF_INET6, skb, &iphdr);
+ if (iphdr.protocol != IPPROTO_ICMPV6)
return NF_ACCEPT;
/* ipvs enabled in this netns ? */
diff --git a/net/netfilter/ipvs/ip_vs_dh.c b/net/netfilter/ipvs/ip_vs_dh.c
index 8b7dca9..7f3b0cc 100644
--- a/net/netfilter/ipvs/ip_vs_dh.c
+++ b/net/netfilter/ipvs/ip_vs_dh.c
@@ -215,7 +215,7 @@ ip_vs_dh_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
struct ip_vs_dh_bucket *tbl;
struct ip_vs_iphdr iph;
- ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_addr_only(svc->af, skb, &iph);
IP_VS_DBG(6, "%s(): Scheduling...\n", __func__);
diff --git a/net/netfilter/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c
index df646cc..cbd3748 100644
--- a/net/netfilter/ipvs/ip_vs_lblc.c
+++ b/net/netfilter/ipvs/ip_vs_lblc.c
@@ -479,7 +479,7 @@ ip_vs_lblc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
struct ip_vs_dest *dest = NULL;
struct ip_vs_lblc_entry *en;
- ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_addr_only(svc->af, skb, &iph);
IP_VS_DBG(6, "%s(): Scheduling...\n", __func__);
diff --git a/net/netfilter/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c
index 570e31e..161b679 100644
--- a/net/netfilter/ipvs/ip_vs_lblcr.c
+++ b/net/netfilter/ipvs/ip_vs_lblcr.c
@@ -649,7 +649,7 @@ ip_vs_lblcr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
struct ip_vs_dest *dest = NULL;
struct ip_vs_lblcr_entry *en;
- ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_addr_only(svc->af, skb, &iph);
IP_VS_DBG(6, "%s(): Scheduling...\n", __func__);
diff --git a/net/netfilter/ipvs/ip_vs_pe_sip.c b/net/netfilter/ipvs/ip_vs_pe_sip.c
index 1aa5cac..ee4e2e3 100644
--- a/net/netfilter/ipvs/ip_vs_pe_sip.c
+++ b/net/netfilter/ipvs/ip_vs_pe_sip.c
@@ -73,7 +73,7 @@ ip_vs_sip_fill_param(struct ip_vs_conn_param *p, struct sk_buff *skb)
const char *dptr;
int retc;
- ip_vs_fill_iphdr(p->af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(p->af, skb, &iph);
/* Only useful with UDP */
if (iph.protocol != IPPROTO_UDP)
diff --git a/net/netfilter/ipvs/ip_vs_proto_sctp.c b/net/netfilter/ipvs/ip_vs_proto_sctp.c
index 9f3fb75..b903db6 100644
--- a/net/netfilter/ipvs/ip_vs_proto_sctp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c
@@ -18,7 +18,7 @@ sctp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
sctp_sctphdr_t *sh, _sctph;
struct ip_vs_iphdr iph;
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(af, skb, &iph);
sh = skb_header_pointer(skb, iph.len, sizeof(_sctph), &_sctph);
if (sh == NULL)
@@ -72,12 +72,14 @@ sctp_snat_handler(struct sk_buff *skb,
struct sk_buff *iter;
__be32 crc32;
+ struct ip_vs_iphdr iph;
+ ip_vs_fill_iph_skb(cp->af, skb, &iph);
+ sctphoff = iph.len;
+
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6)
- sctphoff = sizeof(struct ipv6hdr);
- else
+ if (cp->af == AF_INET6 && iph.fragoffs)
+ return 1;
#endif
- sctphoff = ip_hdrlen(skb);
/* csum_check requires unshared skb */
if (!skb_make_writable(skb, sctphoff + sizeof(*sctph)))
@@ -116,12 +118,14 @@ sctp_dnat_handler(struct sk_buff *skb,
struct sk_buff *iter;
__be32 crc32;
+ struct ip_vs_iphdr iph;
+ ip_vs_fill_iph_skb(cp->af, skb, &iph);
+ sctphoff = iph.len;
+
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6)
- sctphoff = sizeof(struct ipv6hdr);
- else
+ if (cp->af == AF_INET6 && iph.fragoffs)
+ return 1;
#endif
- sctphoff = ip_hdrlen(skb);
/* csum_check requires unshared skb */
if (!skb_make_writable(skb, sctphoff + sizeof(*sctph)))
diff --git a/net/netfilter/ipvs/ip_vs_proto_tcp.c b/net/netfilter/ipvs/ip_vs_proto_tcp.c
index cd609cc..8a96069 100644
--- a/net/netfilter/ipvs/ip_vs_proto_tcp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_tcp.c
@@ -40,7 +40,7 @@ tcp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
struct tcphdr _tcph, *th;
struct ip_vs_iphdr iph;
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(af, skb, &iph);
th = skb_header_pointer(skb, iph.len, sizeof(_tcph), &_tcph);
if (th == NULL) {
@@ -136,12 +136,14 @@ tcp_snat_handler(struct sk_buff *skb,
int oldlen;
int payload_csum = 0;
+ struct ip_vs_iphdr iph;
+ ip_vs_fill_iph_skb(cp->af, skb, &iph);
+ tcphoff = iph.len;
+
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6)
- tcphoff = sizeof(struct ipv6hdr);
- else
+ if (cp->af == AF_INET6 && iph.fragoffs)
+ return 1;
#endif
- tcphoff = ip_hdrlen(skb);
oldlen = skb->len - tcphoff;
/* csum_check requires unshared skb */
@@ -216,12 +218,14 @@ tcp_dnat_handler(struct sk_buff *skb,
int oldlen;
int payload_csum = 0;
+ struct ip_vs_iphdr iph;
+ ip_vs_fill_iph_skb(cp->af, skb, &iph);
+ tcphoff = iph.len;
+
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6)
- tcphoff = sizeof(struct ipv6hdr);
- else
+ if (cp->af == AF_INET6 && iph.fragoffs)
+ return 1;
#endif
- tcphoff = ip_hdrlen(skb);
oldlen = skb->len - tcphoff;
/* csum_check requires unshared skb */
diff --git a/net/netfilter/ipvs/ip_vs_proto_udp.c b/net/netfilter/ipvs/ip_vs_proto_udp.c
index 2fedb2d..d6f4eee 100644
--- a/net/netfilter/ipvs/ip_vs_proto_udp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_udp.c
@@ -37,7 +37,7 @@ udp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
struct udphdr _udph, *uh;
struct ip_vs_iphdr iph;
- ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(af, skb, &iph);
uh = skb_header_pointer(skb, iph.len, sizeof(_udph), &_udph);
if (uh == NULL) {
@@ -133,12 +133,14 @@ udp_snat_handler(struct sk_buff *skb,
int oldlen;
int payload_csum = 0;
+ struct ip_vs_iphdr iph;
+ ip_vs_fill_iph_skb(cp->af, skb, &iph);
+ udphoff = iph.len;
+
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6)
- udphoff = sizeof(struct ipv6hdr);
- else
+ if (cp->af == AF_INET6 && iph.fragoffs)
+ return 1;
#endif
- udphoff = ip_hdrlen(skb);
oldlen = skb->len - udphoff;
/* csum_check requires unshared skb */
@@ -218,12 +220,14 @@ udp_dnat_handler(struct sk_buff *skb,
int oldlen;
int payload_csum = 0;
+ struct ip_vs_iphdr iph;
+ ip_vs_fill_iph_skb(cp->af, skb, &iph);
+ udphoff = iph.len;
+
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6)
- udphoff = sizeof(struct ipv6hdr);
- else
+ if (cp->af == AF_INET6 && iph.fragoffs)
+ return 1;
#endif
- udphoff = ip_hdrlen(skb);
oldlen = skb->len - udphoff;
/* csum_check requires unshared skb */
diff --git a/net/netfilter/ipvs/ip_vs_sh.c b/net/netfilter/ipvs/ip_vs_sh.c
index 0512652..e331269 100644
--- a/net/netfilter/ipvs/ip_vs_sh.c
+++ b/net/netfilter/ipvs/ip_vs_sh.c
@@ -228,7 +228,7 @@ ip_vs_sh_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
struct ip_vs_sh_bucket *tbl;
struct ip_vs_iphdr iph;
- ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_addr_only(svc->af, skb, &iph);
IP_VS_DBG(6, "ip_vs_sh_schedule(): Scheduling...\n");
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index 1060bd5..428de75 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -679,14 +679,15 @@ ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
struct rt6_info *rt; /* Route to the other host */
int mtu;
int local;
+ struct ip_vs_iphdr iph;
EnterFunction(10);
+ ip_vs_fill_iph_skb(cp->af, skb, &iph);
/* check if it is a connection of no-client-port */
if (unlikely(cp->flags & IP_VS_CONN_F_NO_CPORT)) {
__be16 _pt, *p;
- p = skb_header_pointer(skb, sizeof(struct ipv6hdr),
- sizeof(_pt), &_pt);
+ p = skb_header_pointer(skb, iph.len, sizeof(_pt), &_pt);
if (p == NULL)
goto tx_error;
ip_vs_conn_fill_cport(cp, *p);
diff --git a/net/netfilter/xt_ipvs.c b/net/netfilter/xt_ipvs.c
index bb10b07..3f9b8cd 100644
--- a/net/netfilter/xt_ipvs.c
+++ b/net/netfilter/xt_ipvs.c
@@ -67,7 +67,7 @@ ipvs_mt(const struct sk_buff *skb, struct xt_action_param *par)
goto out;
}
- ip_vs_fill_iphdr(family, skb_network_header(skb), &iph);
+ ip_vs_fill_iph_skb(family, skb, &iph);
if (data->bitmask & XT_IPVS_PROTO)
if ((iph.protocol == data->l4proto) ^
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V3 6/8] ipvs: Complete IPv6 fragment handling for IPVS
2012-09-11 12:36 [PATCH V3 0/8] ipvs: IPv6 fragment handling for IPVS Jesper Dangaard Brouer
` (4 preceding siblings ...)
2012-09-11 12:37 ` [PATCH V3 5/8] ipvs: Fix faulty IPv6 extension header handling in IPVS Jesper Dangaard Brouer
@ 2012-09-11 12:38 ` Jesper Dangaard Brouer
2012-09-11 12:38 ` [PATCH V3 7/8] ipvs: API change to avoid rescan of IPv6 exthdr Jesper Dangaard Brouer
` (2 subsequent siblings)
8 siblings, 0 replies; 12+ messages in thread
From: Jesper Dangaard Brouer @ 2012-09-11 12:38 UTC (permalink / raw)
To: Hans Schillstrom, Hans Schillstrom, netdev, Patrick McHardy,
Pablo Neira Ayuso, lvs-devel, Julian Anastasov
Cc: Jesper Dangaard Brouer, Thomas Graf, Wensong Zhang,
netfilter-devel, Simon Horman
IPVS now supports fragmented packets, with support from nf_conntrack_reasm.c
Based on patch from: Hans Schillstrom.
IPVS do like conntrack i.e. use the skb->nfct_reasm
(i.e. when all fragments is collected, nf_ct_frag6_output()
starts a "re-play" of all fragments into the interrupted
PREROUTING chain at prio -399 (NF_IP6_PRI_CONNTRACK_DEFRAG+1)
with nfct_reasm pointing to the assembled packet.)
Notice, module nf_defrag_ipv6 must be loaded for this to work.
Report unhandled fragments, and recommend user to load nf_defrag_ipv6.
To handle fw-mark for fragments. Add a new IPVS hook into prerouting
chain at prio -99 (NF_IP6_PRI_NAT_DST+1) to catch fragments, and copy
fw-mark info from the first packet with an upper layer header.
IPv6 fragment handling should be the last thing on the IPVS IPv6
missing support list.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
---
V3:
- In case of no nf_defrag_ipv6, second fragments could create
strange conn entries, fix that.
- Report unhandled fragments, and recommend user to load nf_defrag_ipv6.
- Move ICMPv6 improvements to seperate patch
V2:
- In ip_vs_in_icmp_v6() hint that &ciph.len can be updated
- Add NULL pointer check in ip_vs_in_icmp_v6()
V1:
- Fixed refcnt bug since last.
include/net/ip_vs.h | 39 +++++++++++++
net/netfilter/ipvs/Kconfig | 6 +-
net/netfilter/ipvs/ip_vs_conn.c | 2 -
net/netfilter/ipvs/ip_vs_core.c | 117 ++++++++++++++++++++++++++++++++-------
net/netfilter/ipvs/ip_vs_xmit.c | 33 ++++++++---
5 files changed, 162 insertions(+), 35 deletions(-)
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 29265bf..98806b6 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -109,6 +109,7 @@ extern int ip_vs_conn_tab_size;
struct ip_vs_iphdr {
__u32 len; /* IPv4 simply where L4 starts
IPv6 where L4 Transport Header starts */
+ __u32 thoff_reasm; /* Transport Header Offset in nfct_reasm skb */
__u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/
__s16 protocol;
__s32 flags;
@@ -116,6 +117,35 @@ struct ip_vs_iphdr {
union nf_inet_addr daddr;
};
+/* Dependency to module: nf_defrag_ipv6 */
+#if defined(CONFIG_NF_DEFRAG_IPV6) || defined(CONFIG_NF_DEFRAG_IPV6_MODULE)
+static inline struct sk_buff *skb_nfct_reasm(const struct sk_buff *skb)
+{
+ return skb->nfct_reasm;
+}
+static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset,
+ int len, void *buffer,
+ const struct ip_vs_iphdr *ipvsh)
+{
+ if (unlikely(ipvsh->fragoffs && skb_nfct_reasm(skb)))
+ return skb_header_pointer(skb_nfct_reasm(skb),
+ ipvsh->thoff_reasm, len, buffer);
+
+ return skb_header_pointer(skb, offset, len, buffer);
+}
+#else
+static inline struct sk_buff *skb_nfct_reasm(const struct sk_buff *skb)
+{
+ return NULL;
+}
+static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset,
+ int len, void *buffer,
+ const struct ip_vs_iphdr *ipvsh)
+{
+ return skb_header_pointer(skb, offset, len, buffer);
+}
+#endif
+
static inline void
ip_vs_fill_ip4hdr(const void *nh, struct ip_vs_iphdr *iphdr)
{
@@ -141,12 +171,19 @@ ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, struct ip_vs_iphdr *iphdr)
(struct ipv6hdr *)skb_network_header(skb);
iphdr->saddr.in6 = iph->saddr;
iphdr->daddr.in6 = iph->daddr;
- /* ipv6_find_hdr() updates len, flags */
+ /* ipv6_find_hdr() updates len, flags, thoff_reasm */
+ iphdr->thoff_reasm = 0;
iphdr->len = 0;
iphdr->flags = 0;
iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1,
&iphdr->fragoffs,
&iphdr->flags);
+ /* get proto from re-assembled packet and it's offset */
+ if (skb_nfct_reasm(skb))
+ iphdr->protocol = ipv6_find_hdr(skb_nfct_reasm(skb),
+ &iphdr->thoff_reasm,
+ -1, NULL, NULL);
+
} else
#endif
{
diff --git a/net/netfilter/ipvs/Kconfig b/net/netfilter/ipvs/Kconfig
index a97ae53..0c3b167 100644
--- a/net/netfilter/ipvs/Kconfig
+++ b/net/netfilter/ipvs/Kconfig
@@ -30,11 +30,9 @@ config IP_VS_IPV6
depends on IPV6 = y || IP_VS = IPV6
select IP6_NF_IPTABLES
---help---
- Add IPv6 support to IPVS. This is incomplete and might be dangerous.
+ Add IPv6 support to IPVS.
- See http://www.mindbasket.com/ipvs for more information.
-
- Say N if unsure.
+ Say Y if unsure.
config IP_VS_DEBUG
bool "IP virtual server debugging"
diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
index 1548df9..d6c1c26 100644
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -314,7 +314,7 @@ ip_vs_conn_fill_param_proto(int af, const struct sk_buff *skb,
__be16 _ports[2], *pptr;
struct net *net = skb_net(skb);
- pptr = skb_header_pointer(skb, proto_off, sizeof(_ports), _ports);
+ pptr = frag_safe_skb_hp(skb, proto_off, sizeof(_ports), _ports, iph);
if (pptr == NULL)
return 1;
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index caed44d..4b9995e 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -402,8 +402,12 @@ ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
unsigned int flags;
*ignored = 1;
+
+ /*
+ * IPv6 frags, only the first hit here.
+ */
ip_vs_fill_iph_skb(svc->af, skb, &iph);
- pptr = skb_header_pointer(skb, iph.len, sizeof(_ports), _ports);
+ pptr = frag_safe_skb_hp(skb, iph.len, sizeof(_ports), _ports, &iph);
if (pptr == NULL)
return NULL;
@@ -507,8 +511,7 @@ int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
#endif
ip_vs_fill_iph_skb(svc->af, skb, &iph);
-
- pptr = skb_header_pointer(skb, iph.len, sizeof(_ports), _ports);
+ pptr = frag_safe_skb_hp(skb, iph.len, sizeof(_ports), _ports, &iph);
if (pptr == NULL) {
ip_vs_service_put(svc);
return NF_DROP;
@@ -654,14 +657,6 @@ static inline int ip_vs_gather_frags(struct sk_buff *skb, u_int32_t user)
return err;
}
-#ifdef CONFIG_IP_VS_IPV6
-static inline int ip_vs_gather_frags_v6(struct sk_buff *skb, u_int32_t user)
-{
- /* TODO IPv6: Find out what to do here for IPv6 */
- return 0;
-}
-#endif
-
static int ip_vs_route_me_harder(int af, struct sk_buff *skb)
{
#ifdef CONFIG_IP_VS_IPV6
@@ -941,8 +936,7 @@ static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related,
ip_vs_fill_iph_skb(AF_INET6, skb, ipvsh);
*related = 1;
-
- ic = skb_header_pointer(skb, ipvsh->len, sizeof(_icmph), &_icmph);
+ ic = frag_safe_skb_hp(skb, ipvsh->len, sizeof(_icmph), &_icmph, ipvsh);
if (ic == NULL)
return NF_DROP;
@@ -961,6 +955,11 @@ static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related,
*related = 0;
return NF_ACCEPT;
}
+ /* Fragment header that is before ICMP header tells us that:
+ * it's not an error message since they can't be fragmented.
+ */
+ if (ipvsh->flags & IP6T_FH_F_FRAG)
+ return NF_DROP;
/* Now find the contained IP header */
ipvsh->len += sizeof(_icmph);
@@ -1117,6 +1116,12 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
ip_vs_fill_iph_skb(af, skb, &iph);
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6) {
+ if (!iph.fragoffs && skb_nfct_reasm(skb)) {
+ struct sk_buff *reasm = skb_nfct_reasm(skb);
+ /* Save fw mark for coming frags */
+ reasm->ipvs_property = 1;
+ reasm->mark = skb->mark;
+ }
if (unlikely(iph.protocol == IPPROTO_ICMPV6)) {
int related;
int verdict = ip_vs_out_icmp_v6(skb, &related,
@@ -1124,7 +1129,6 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
if (related)
return verdict;
- ip_vs_fill_iph_skb(af, skb, &iph);
}
} else
#endif
@@ -1134,7 +1138,6 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
if (related)
return verdict;
- ip_vs_fill_ip4hdr(skb_network_header(skb), &iph);
}
pd = ip_vs_proto_data_get(net, iph.protocol);
@@ -1167,8 +1170,8 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
pp->protocol == IPPROTO_SCTP)) {
__be16 _ports[2], *pptr;
- pptr = skb_header_pointer(skb, iph.len,
- sizeof(_ports), _ports);
+ pptr = frag_safe_skb_hp(skb, iph.len,
+ sizeof(_ports), _ports, &iph);
if (pptr == NULL)
return NF_ACCEPT; /* Not for me */
if (ip_vs_lookup_real_service(net, af, iph.protocol,
@@ -1468,7 +1471,7 @@ ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum)
*related = 1;
- ic = skb_header_pointer(skb, iph->len, sizeof(_icmph), &_icmph);
+ ic = frag_safe_skb_hp(skb, iph->len, sizeof(_icmph), &_icmph, iph);
if (ic == NULL)
return NF_DROP;
@@ -1487,6 +1490,11 @@ ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum)
*related = 0;
return NF_ACCEPT;
}
+ /* Fragment header that is before ICMP header tells us that:
+ * it's not an error message since they can't be fragmented.
+ */
+ if (iph->flags & IP6T_FH_F_FRAG)
+ return NF_DROP;
/* Now find the contained IP header */
ciph.len = iph->len + sizeof(_icmph);
@@ -1511,10 +1519,20 @@ ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum)
IP_VS_DBG_PKT(11, AF_INET6, pp, skb, offs_ciph,
"Checking incoming ICMPv6 for");
- /* The embedded headers contain source and dest in reverse order */
- cp = pp->conn_in_get(AF_INET6, skb, &ciph, ciph.len, 1);
+ /* The embedded headers contain source and dest in reverse order
+ * if not from localhost
+ */
+ cp = pp->conn_in_get(AF_INET6, skb, &ciph, ciph.len,
+ (hooknum == NF_INET_LOCAL_OUT) ? 0 : 1);
+
if (!cp)
return NF_ACCEPT;
+ /* VS/TUN, VS/DR and LOCALNODE just let it go */
+ if ((hooknum == NF_INET_LOCAL_OUT) &&
+ (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ)) {
+ __ip_vs_conn_put(cp);
+ return NF_ACCEPT;
+ }
/* do the statistics and put it back */
ip_vs_in_stats(cp, skb);
@@ -1584,6 +1602,12 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6) {
+ if (!iph.fragoffs && skb_nfct_reasm(skb)) {
+ struct sk_buff *reasm = skb_nfct_reasm(skb);
+ /* Save fw mark for coming frags. */
+ reasm->ipvs_property = 1;
+ reasm->mark = skb->mark;
+ }
if (unlikely(iph.protocol == IPPROTO_ICMPV6)) {
int related;
int verdict = ip_vs_in_icmp_v6(skb, &related, hooknum);
@@ -1608,13 +1632,16 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
pp = pd->pp;
/*
* Check if the packet belongs to an existing connection entry
- * Only sched first IPv6 fragment.
*/
cp = pp->conn_in_get(af, skb, &iph, iph.len, 0);
if (unlikely(!cp) && !iph.fragoffs) {
+ /* No (second) fragments need to enter here, as nf_defrag_ipv6
+ * replayed fragment zero will already have created the cp
+ */
int v;
+ /* Schedule and create new connection entry into &cp */
if (!pp->conn_schedule(af, skb, pd, &v, &cp))
return v;
}
@@ -1623,6 +1650,14 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
/* sorry, all this trouble for a no-hit :) */
IP_VS_DBG_PKT(12, af, pp, skb, 0,
"ip_vs_in: packet continues traversal as normal");
+ if (iph.fragoffs && !skb_nfct_reasm(skb)) {
+ /* Fragment that couldn't be mapped to a conn entry
+ * and don't have any pointer to a reasm skb
+ * is missing module nf_defrag_ipv6
+ */
+ IP_VS_DBG_RL("Unhandled frag, load nf_defrag_ipv6\n");
+ IP_VS_DBG_PKT(7, af, pp, skb, 0, "unhandled fragment");
+ }
return NF_ACCEPT;
}
@@ -1707,6 +1742,38 @@ ip_vs_local_request4(unsigned int hooknum, struct sk_buff *skb,
#ifdef CONFIG_IP_VS_IPV6
/*
+ * AF_INET6 fragment handling
+ * Copy info from first fragment, to the rest of them.
+ */
+static unsigned int
+ip_vs_preroute_frag6(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(skb);
+ struct net *net;
+
+ /* Skip if not a "replay" from nf_ct_frag6_output or first fragment.
+ * ipvs_property is set when checking first fragment
+ * in ip_vs_in() and ip_vs_out().
+ */
+ if (reasm)
+ IP_VS_DBG(2, "Fragment recv prop:%d\n", reasm->ipvs_property);
+ if (!reasm || !reasm->ipvs_property)
+ return NF_ACCEPT;
+
+ net = skb_net(skb);
+ if (!net_ipvs(net)->enable)
+ return NF_ACCEPT;
+
+ /* Copy stored fw mark, saved in ip_vs_{in,out} */
+ skb->mark = reasm->mark;
+
+ return NF_ACCEPT;
+}
+
+/*
* AF_INET6 handler in NF_INET_LOCAL_IN chain
* Schedule and forward packets from remote clients
*/
@@ -1845,6 +1912,14 @@ static struct nf_hook_ops ip_vs_ops[] __read_mostly = {
.priority = 100,
},
#ifdef CONFIG_IP_VS_IPV6
+ /* After mangle & nat fetch 2:nd fragment and following */
+ {
+ .hook = ip_vs_preroute_frag6,
+ .owner = THIS_MODULE,
+ .pf = NFPROTO_IPV6,
+ .hooknum = NF_INET_PRE_ROUTING,
+ .priority = NF_IP6_PRI_NAT_DST + 1,
+ },
/* After packet filtering, change source only for VS/NAT */
{
.hook = ip_vs_reply6,
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index 428de75..e44933f 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -496,12 +496,13 @@ ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
struct ip_vs_protocol *pp)
{
struct rt6_info *rt; /* Route to the other host */
- struct ipv6hdr *iph = ipv6_hdr(skb);
+ struct ip_vs_iphdr iph;
int mtu;
EnterFunction(10);
+ ip_vs_fill_iph_skb(cp->af, skb, &iph);
- if (!(rt = __ip_vs_get_out_rt_v6(skb, NULL, &iph->daddr, NULL, 0,
+ if (!(rt = __ip_vs_get_out_rt_v6(skb, NULL, &iph.daddr.in6, NULL, 0,
IP_VS_RT_MODE_NON_LOCAL)))
goto tx_error_icmp;
@@ -513,7 +514,9 @@ ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
skb->dev = net->loopback_dev;
}
- icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
+ /* only send ICMP too big on first fragment */
+ if (!iph.fragoffs)
+ icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
dst_release(&rt->dst);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
goto tx_error;
@@ -685,7 +688,7 @@ ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
ip_vs_fill_iph_skb(cp->af, skb, &iph);
/* check if it is a connection of no-client-port */
- if (unlikely(cp->flags & IP_VS_CONN_F_NO_CPORT)) {
+ if (unlikely(cp->flags & IP_VS_CONN_F_NO_CPORT && !iph.fragoffs)) {
__be16 _pt, *p;
p = skb_header_pointer(skb, iph.len, sizeof(_pt), &_pt);
if (p == NULL)
@@ -735,7 +738,9 @@ ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
skb->dev = net->loopback_dev;
}
- icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
+ /* only send ICMP too big on first fragment */
+ if (!iph.fragoffs)
+ icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
IP_VS_DBG_RL_PKT(0, AF_INET6, pp, skb, 0,
"ip_vs_nat_xmit_v6(): frag needed for");
goto tx_error_put;
@@ -940,8 +945,10 @@ ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
unsigned int max_headroom; /* The extra header space needed */
int mtu;
int ret;
+ struct ip_vs_iphdr ipvsh;
EnterFunction(10);
+ ip_vs_fill_iph_skb(cp->af, skb, &ipvsh);
if (!(rt = __ip_vs_get_out_rt_v6(skb, cp->dest, &cp->daddr.in6,
&saddr, 1, (IP_VS_RT_MODE_LOCAL |
@@ -970,7 +977,9 @@ ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
skb->dev = net->loopback_dev;
}
- icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
+ /* only send ICMP too big on first fragment */
+ if (!ipvsh.fragoffs)
+ icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
goto tx_error_put;
}
@@ -1116,8 +1125,10 @@ ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
{
struct rt6_info *rt; /* Route to the other host */
int mtu;
+ struct ip_vs_iphdr iph;
EnterFunction(10);
+ ip_vs_fill_iph_skb(cp->af, skb, &iph);
if (!(rt = __ip_vs_get_out_rt_v6(skb, cp->dest, &cp->daddr.in6, NULL,
0, (IP_VS_RT_MODE_LOCAL |
@@ -1136,7 +1147,9 @@ ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
skb->dev = net->loopback_dev;
}
- icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
+ /* only send ICMP too big on first fragment */
+ if (!iph.fragoffs)
+ icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
dst_release(&rt->dst);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
goto tx_error;
@@ -1308,8 +1321,10 @@ ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
int rc;
int local;
int rt_mode;
+ struct ip_vs_iphdr iph;
EnterFunction(10);
+ ip_vs_fill_iph_skb(cp->af, skb, &iph);
/* The ICMP packet for VS/TUN, VS/DR and LOCALNODE will be
forwarded directly here, because there is no need to
@@ -1372,7 +1387,9 @@ ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
skb->dev = net->loopback_dev;
}
- icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
+ /* only send ICMP too big on first fragment */
+ if (!iph.fragoffs)
+ icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
goto tx_error_put;
}
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH V3 7/8] ipvs: API change to avoid rescan of IPv6 exthdr
2012-09-11 12:36 [PATCH V3 0/8] ipvs: IPv6 fragment handling for IPVS Jesper Dangaard Brouer
` (5 preceding siblings ...)
2012-09-11 12:38 ` [PATCH V3 6/8] ipvs: Complete IPv6 fragment handling for IPVS Jesper Dangaard Brouer
@ 2012-09-11 12:38 ` Jesper Dangaard Brouer
2012-09-11 12:39 ` [PATCH V3 8/8] ipvs: SIP fragment handling Jesper Dangaard Brouer
2012-09-12 22:57 ` [PATCH V3 0/8] ipvs: IPv6 fragment handling for IPVS Julian Anastasov
8 siblings, 0 replies; 12+ messages in thread
From: Jesper Dangaard Brouer @ 2012-09-11 12:38 UTC (permalink / raw)
To: Hans Schillstrom, Hans Schillstrom, netdev, Patrick McHardy,
Pablo Neira Ayuso, lvs-devel, Julian Anastasov
Cc: Jesper Dangaard Brouer, Thomas Graf, Wensong Zhang,
netfilter-devel, Simon Horman
Reduce the number of times we scan/skip the IPv6 exthdrs.
This patch contains a lot of API changes. This is done, to avoid
repeating the scan of finding the IPv6 headers, via ipv6_find_hdr(),
which is called by ip_vs_fill_iph_skb().
Finding the IPv6 headers is done as early as possible, and passed on
as a pointer "struct ip_vs_iphdr *" to the affected functions.
This patch reduce/removes 19 calls to ip_vs_fill_iph_skb().
Notice, I have choosen, not to change the API of function
pointer "(*schedule)" (in struct ip_vs_scheduler) as it can be
used by external schedulers, via {un,}register_ip_vs_scheduler.
Only 4 out of 10 schedulers use info from ip_vs_iphdr*, and when
they do, they are only interested in iph->{s,d}addr.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
---
V3:
- This patch is introduced in V3, to allow easier integration of
Patricks idea and my RFC patch of caching exthdr info in skb->cb[]
include/net/ip_vs.h | 81 +++++++++++-----------
net/netfilter/ipvs/ip_vs_conn.c | 15 ++--
net/netfilter/ipvs/ip_vs_core.c | 116 ++++++++++++++-----------------
net/netfilter/ipvs/ip_vs_proto_ah_esp.c | 9 +-
net/netfilter/ipvs/ip_vs_proto_sctp.c | 42 ++++-------
net/netfilter/ipvs/ip_vs_proto_tcp.c | 40 ++++-------
net/netfilter/ipvs/ip_vs_proto_udp.c | 41 ++++-------
net/netfilter/ipvs/ip_vs_xmit.c | 61 +++++++---------
net/netfilter/xt_ipvs.c | 2 -
9 files changed, 177 insertions(+), 230 deletions(-)
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 98806b6..a681ad6 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -487,27 +487,26 @@ struct ip_vs_protocol {
int (*conn_schedule)(int af, struct sk_buff *skb,
struct ip_vs_proto_data *pd,
- int *verdict, struct ip_vs_conn **cpp);
+ int *verdict, struct ip_vs_conn **cpp,
+ struct ip_vs_iphdr *iph);
struct ip_vs_conn *
(*conn_in_get)(int af,
const struct sk_buff *skb,
const struct ip_vs_iphdr *iph,
- unsigned int proto_off,
int inverse);
struct ip_vs_conn *
(*conn_out_get)(int af,
const struct sk_buff *skb,
const struct ip_vs_iphdr *iph,
- unsigned int proto_off,
int inverse);
- int (*snat_handler)(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp);
+ int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp,
+ struct ip_vs_conn *cp, struct ip_vs_iphdr *iph);
- int (*dnat_handler)(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp);
+ int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp,
+ struct ip_vs_conn *cp, struct ip_vs_iphdr *iph);
int (*csum_check)(int af, struct sk_buff *skb,
struct ip_vs_protocol *pp);
@@ -607,7 +606,7 @@ struct ip_vs_conn {
NF_ACCEPT can be returned when destination is local.
*/
int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp);
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
/* Note: we can group the following members into a structure,
in order to save more space, and the following members are
@@ -858,13 +857,11 @@ struct ip_vs_app {
struct ip_vs_conn *
(*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app,
- const struct iphdr *iph, unsigned int proto_off,
- int inverse);
+ const struct iphdr *iph, int inverse);
struct ip_vs_conn *
(*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app,
- const struct iphdr *iph, unsigned int proto_off,
- int inverse);
+ const struct iphdr *iph, int inverse);
int (*state_transition)(struct ip_vs_conn *cp, int direction,
const struct sk_buff *skb,
@@ -1163,14 +1160,12 @@ struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p);
struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb,
const struct ip_vs_iphdr *iph,
- unsigned int proto_off,
int inverse);
struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p);
struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb,
const struct ip_vs_iphdr *iph,
- unsigned int proto_off,
int inverse);
/* put back the conn without restarting its timer */
@@ -1343,9 +1338,10 @@ extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name);
extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler);
extern struct ip_vs_conn *
ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
- struct ip_vs_proto_data *pd, int *ignored);
+ struct ip_vs_proto_data *pd, int *ignored,
+ struct ip_vs_iphdr *iph);
extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
- struct ip_vs_proto_data *pd);
+ struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph);
extern void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg);
@@ -1404,33 +1400,38 @@ extern void ip_vs_read_estimator(struct ip_vs_stats_user *dst,
/*
* Various IPVS packet transmitters (from ip_vs_xmit.c)
*/
-extern int ip_vs_null_xmit
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
-extern int ip_vs_bypass_xmit
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
-extern int ip_vs_nat_xmit
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
-extern int ip_vs_tunnel_xmit
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
-extern int ip_vs_dr_xmit
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
-extern int ip_vs_icmp_xmit
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp,
- int offset, unsigned int hooknum);
+extern int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
+extern int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp,
+ struct ip_vs_iphdr *iph);
+extern int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
+extern int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp,
+ struct ip_vs_iphdr *iph);
+extern int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
+extern int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp, int offset,
+ unsigned int hooknum, struct ip_vs_iphdr *iph);
extern void ip_vs_dst_reset(struct ip_vs_dest *dest);
#ifdef CONFIG_IP_VS_IPV6
-extern int ip_vs_bypass_xmit_v6
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
-extern int ip_vs_nat_xmit_v6
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
-extern int ip_vs_tunnel_xmit_v6
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
-extern int ip_vs_dr_xmit_v6
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
-extern int ip_vs_icmp_xmit_v6
-(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp,
- int offset, unsigned int hooknum);
+extern int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp,
+ struct ip_vs_iphdr *iph);
+extern int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp,
+ struct ip_vs_iphdr *iph);
+extern int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp,
+ struct ip_vs_iphdr *iph);
+extern int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
+extern int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
+ struct ip_vs_protocol *pp, int offset,
+ unsigned int hooknum, struct ip_vs_iphdr *iph);
#endif
#ifdef CONFIG_SYSCTL
diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
index d6c1c26..30e764a 100644
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -308,13 +308,12 @@ struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p)
static int
ip_vs_conn_fill_param_proto(int af, const struct sk_buff *skb,
const struct ip_vs_iphdr *iph,
- unsigned int proto_off, int inverse,
- struct ip_vs_conn_param *p)
+ int inverse, struct ip_vs_conn_param *p)
{
__be16 _ports[2], *pptr;
struct net *net = skb_net(skb);
- pptr = frag_safe_skb_hp(skb, proto_off, sizeof(_ports), _ports, iph);
+ pptr = frag_safe_skb_hp(skb, iph->len, sizeof(_ports), _ports, iph);
if (pptr == NULL)
return 1;
@@ -329,12 +328,11 @@ ip_vs_conn_fill_param_proto(int af, const struct sk_buff *skb,
struct ip_vs_conn *
ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb,
- const struct ip_vs_iphdr *iph,
- unsigned int proto_off, int inverse)
+ const struct ip_vs_iphdr *iph, int inverse)
{
struct ip_vs_conn_param p;
- if (ip_vs_conn_fill_param_proto(af, skb, iph, proto_off, inverse, &p))
+ if (ip_vs_conn_fill_param_proto(af, skb, iph, inverse, &p))
return NULL;
return ip_vs_conn_in_get(&p);
@@ -432,12 +430,11 @@ struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p)
struct ip_vs_conn *
ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb,
- const struct ip_vs_iphdr *iph,
- unsigned int proto_off, int inverse)
+ const struct ip_vs_iphdr *iph, int inverse)
{
struct ip_vs_conn_param p;
- if (ip_vs_conn_fill_param_proto(af, skb, iph, proto_off, inverse, &p))
+ if (ip_vs_conn_fill_param_proto(af, skb, iph, inverse, &p))
return NULL;
return ip_vs_conn_out_get(&p);
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index 4b9995e..f72d64f 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -222,11 +222,10 @@ ip_vs_conn_fill_param_persist(const struct ip_vs_service *svc,
*/
static struct ip_vs_conn *
ip_vs_sched_persist(struct ip_vs_service *svc,
- struct sk_buff *skb,
- __be16 src_port, __be16 dst_port, int *ignored)
+ struct sk_buff *skb, __be16 src_port, __be16 dst_port,
+ int *ignored, struct ip_vs_iphdr *iph)
{
struct ip_vs_conn *cp = NULL;
- struct ip_vs_iphdr iph;
struct ip_vs_dest *dest;
struct ip_vs_conn *ct;
__be16 dport = 0; /* destination port to forward */
@@ -236,20 +235,18 @@ ip_vs_sched_persist(struct ip_vs_service *svc,
union nf_inet_addr snet; /* source network of the client,
after masking */
- ip_vs_fill_iph_skb(svc->af, skb, &iph);
-
/* Mask saddr with the netmask to adjust template granularity */
#ifdef CONFIG_IP_VS_IPV6
if (svc->af == AF_INET6)
- ipv6_addr_prefix(&snet.in6, &iph.saddr.in6, svc->netmask);
+ ipv6_addr_prefix(&snet.in6, &iph->saddr.in6, svc->netmask);
else
#endif
- snet.ip = iph.saddr.ip & svc->netmask;
+ snet.ip = iph->saddr.ip & svc->netmask;
IP_VS_DBG_BUF(6, "p-schedule: src %s:%u dest %s:%u "
"mnet %s\n",
- IP_VS_DBG_ADDR(svc->af, &iph.saddr), ntohs(src_port),
- IP_VS_DBG_ADDR(svc->af, &iph.daddr), ntohs(dst_port),
+ IP_VS_DBG_ADDR(svc->af, &iph->saddr), ntohs(src_port),
+ IP_VS_DBG_ADDR(svc->af, &iph->daddr), ntohs(dst_port),
IP_VS_DBG_ADDR(svc->af, &snet));
/*
@@ -266,8 +263,8 @@ ip_vs_sched_persist(struct ip_vs_service *svc,
* is created for other persistent services.
*/
{
- int protocol = iph.protocol;
- const union nf_inet_addr *vaddr = &iph.daddr;
+ int protocol = iph->protocol;
+ const union nf_inet_addr *vaddr = &iph->daddr;
__be16 vport = 0;
if (dst_port == svc->port) {
@@ -342,14 +339,14 @@ ip_vs_sched_persist(struct ip_vs_service *svc,
dport = dest->port;
flags = (svc->flags & IP_VS_SVC_F_ONEPACKET
- && iph.protocol == IPPROTO_UDP)?
+ && iph->protocol == IPPROTO_UDP) ?
IP_VS_CONN_F_ONE_PACKET : 0;
/*
* Create a new connection according to the template
*/
- ip_vs_conn_fill_param(svc->net, svc->af, iph.protocol, &iph.saddr,
- src_port, &iph.daddr, dst_port, ¶m);
+ ip_vs_conn_fill_param(svc->net, svc->af, iph->protocol, &iph->saddr,
+ src_port, &iph->daddr, dst_port, ¶m);
cp = ip_vs_conn_new(¶m, &dest->addr, dport, flags, dest, skb->mark);
if (cp == NULL) {
@@ -392,22 +389,20 @@ ip_vs_sched_persist(struct ip_vs_service *svc,
*/
struct ip_vs_conn *
ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
- struct ip_vs_proto_data *pd, int *ignored)
+ struct ip_vs_proto_data *pd, int *ignored,
+ struct ip_vs_iphdr *iph)
{
struct ip_vs_protocol *pp = pd->pp;
struct ip_vs_conn *cp = NULL;
- struct ip_vs_iphdr iph;
struct ip_vs_dest *dest;
__be16 _ports[2], *pptr;
unsigned int flags;
*ignored = 1;
-
/*
* IPv6 frags, only the first hit here.
*/
- ip_vs_fill_iph_skb(svc->af, skb, &iph);
- pptr = frag_safe_skb_hp(skb, iph.len, sizeof(_ports), _ports, &iph);
+ pptr = frag_safe_skb_hp(skb, iph->len, sizeof(_ports), _ports, iph);
if (pptr == NULL)
return NULL;
@@ -427,7 +422,7 @@ ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
* Do not schedule replies from local real server.
*/
if ((!skb->dev || skb->dev->flags & IFF_LOOPBACK) &&
- (cp = pp->conn_in_get(svc->af, skb, &iph, iph.len, 1))) {
+ (cp = pp->conn_in_get(svc->af, skb, iph, 1))) {
IP_VS_DBG_PKT(12, svc->af, pp, skb, 0,
"Not scheduling reply for existing connection");
__ip_vs_conn_put(cp);
@@ -438,7 +433,8 @@ ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
* Persistent service
*/
if (svc->flags & IP_VS_SVC_F_PERSISTENT)
- return ip_vs_sched_persist(svc, skb, pptr[0], pptr[1], ignored);
+ return ip_vs_sched_persist(svc, skb, pptr[0], pptr[1], ignored,
+ iph);
*ignored = 0;
@@ -460,7 +456,7 @@ ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
}
flags = (svc->flags & IP_VS_SVC_F_ONEPACKET
- && iph.protocol == IPPROTO_UDP)?
+ && iph->protocol == IPPROTO_UDP) ?
IP_VS_CONN_F_ONE_PACKET : 0;
/*
@@ -469,9 +465,9 @@ ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
{
struct ip_vs_conn_param p;
- ip_vs_conn_fill_param(svc->net, svc->af, iph.protocol,
- &iph.saddr, pptr[0], &iph.daddr, pptr[1],
- &p);
+ ip_vs_conn_fill_param(svc->net, svc->af, iph->protocol,
+ &iph->saddr, pptr[0], &iph->daddr,
+ pptr[1], &p);
cp = ip_vs_conn_new(&p, &dest->addr,
dest->port ? dest->port : pptr[1],
flags, dest, skb->mark);
@@ -500,18 +496,16 @@ ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
* no destination is available for a new connection.
*/
int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
- struct ip_vs_proto_data *pd)
+ struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph)
{
__be16 _ports[2], *pptr;
- struct ip_vs_iphdr iph;
#ifdef CONFIG_SYSCTL
struct net *net;
struct netns_ipvs *ipvs;
int unicast;
#endif
- ip_vs_fill_iph_skb(svc->af, skb, &iph);
- pptr = frag_safe_skb_hp(skb, iph.len, sizeof(_ports), _ports, &iph);
+ pptr = frag_safe_skb_hp(skb, iph->len, sizeof(_ports), _ports, iph);
if (pptr == NULL) {
ip_vs_service_put(svc);
return NF_DROP;
@@ -522,10 +516,10 @@ int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
#ifdef CONFIG_IP_VS_IPV6
if (svc->af == AF_INET6)
- unicast = ipv6_addr_type(&iph.daddr.in6) & IPV6_ADDR_UNICAST;
+ unicast = ipv6_addr_type(&iph->daddr.in6) & IPV6_ADDR_UNICAST;
else
#endif
- unicast = (inet_addr_type(net, iph.daddr.ip) == RTN_UNICAST);
+ unicast = (inet_addr_type(net, iph->daddr.ip) == RTN_UNICAST);
/* if it is fwmark-based service, the cache_bypass sysctl is up
and the destination is a non-local unicast, then create
@@ -535,7 +529,7 @@ int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
int ret;
struct ip_vs_conn *cp;
unsigned int flags = (svc->flags & IP_VS_SVC_F_ONEPACKET &&
- iph.protocol == IPPROTO_UDP)?
+ iph->protocol == IPPROTO_UDP) ?
IP_VS_CONN_F_ONE_PACKET : 0;
union nf_inet_addr daddr = { .all = { 0, 0, 0, 0 } };
@@ -545,9 +539,9 @@ int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
IP_VS_DBG(6, "%s(): create a cache_bypass entry\n", __func__);
{
struct ip_vs_conn_param p;
- ip_vs_conn_fill_param(svc->net, svc->af, iph.protocol,
- &iph.saddr, pptr[0],
- &iph.daddr, pptr[1], &p);
+ ip_vs_conn_fill_param(svc->net, svc->af, iph->protocol,
+ &iph->saddr, pptr[0],
+ &iph->daddr, pptr[1], &p);
cp = ip_vs_conn_new(&p, &daddr, 0,
IP_VS_CONN_F_BYPASS | flags,
NULL, skb->mark);
@@ -562,7 +556,7 @@ int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
ip_vs_set_state(cp, IP_VS_DIR_INPUT, skb, pd);
/* transmit the first SYN packet */
- ret = cp->packet_xmit(skb, cp, pd->pp);
+ ret = cp->packet_xmit(skb, cp, pd->pp, iph);
/* do not touch skb anymore */
atomic_inc(&cp->in_pkts);
@@ -911,7 +905,7 @@ static int ip_vs_out_icmp(struct sk_buff *skb, int *related,
ip_vs_fill_ip4hdr(cih, &ciph);
ciph.len += offset;
/* The embedded headers contain source and dest in reverse order */
- cp = pp->conn_out_get(AF_INET, skb, &ciph, offset, 1);
+ cp = pp->conn_out_get(AF_INET, skb, &ciph, 1);
if (!cp)
return NF_ACCEPT;
@@ -922,7 +916,7 @@ static int ip_vs_out_icmp(struct sk_buff *skb, int *related,
#ifdef CONFIG_IP_VS_IPV6
static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related,
- unsigned int hooknum)
+ unsigned int hooknum, struct ip_vs_iphdr *ipvsh)
{
struct icmp6hdr _icmph, *ic;
struct ipv6hdr _ip6, *ip6; /* The ip header contained
@@ -931,10 +925,6 @@ static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related,
struct ip_vs_protocol *pp;
union nf_inet_addr snet;
- struct ip_vs_iphdr ipvsh_stack;
- struct ip_vs_iphdr *ipvsh = &ipvsh_stack;
- ip_vs_fill_iph_skb(AF_INET6, skb, ipvsh);
-
*related = 1;
ic = frag_safe_skb_hp(skb, ipvsh->len, sizeof(_icmph), &_icmph, ipvsh);
if (ic == NULL)
@@ -977,7 +967,7 @@ static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related,
ipvsh->daddr.in6 = ip6->daddr;
/* The embedded headers contain source and dest in reverse order */
- cp = pp->conn_out_get(AF_INET6, skb, ipvsh, ipvsh->len, 1);
+ cp = pp->conn_out_get(AF_INET6, skb, ipvsh, 1);
if (!cp)
return NF_ACCEPT;
@@ -1016,17 +1006,17 @@ static inline int is_tcp_reset(const struct sk_buff *skb, int nh_len)
*/
static unsigned int
handle_response(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
- struct ip_vs_conn *cp, int ihl)
+ struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)
{
struct ip_vs_protocol *pp = pd->pp;
IP_VS_DBG_PKT(11, af, pp, skb, 0, "Outgoing packet");
- if (!skb_make_writable(skb, ihl))
+ if (!skb_make_writable(skb, iph->len))
goto drop;
/* mangle the packet */
- if (pp->snat_handler && !pp->snat_handler(skb, pp, cp))
+ if (pp->snat_handler && !pp->snat_handler(skb, pp, cp, iph))
goto drop;
#ifdef CONFIG_IP_VS_IPV6
@@ -1125,7 +1115,7 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
if (unlikely(iph.protocol == IPPROTO_ICMPV6)) {
int related;
int verdict = ip_vs_out_icmp_v6(skb, &related,
- hooknum);
+ hooknum, &iph);
if (related)
return verdict;
@@ -1160,10 +1150,10 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int af)
/*
* Check if the packet belongs to an existing entry
*/
- cp = pp->conn_out_get(af, skb, &iph, iph.len, 0);
+ cp = pp->conn_out_get(af, skb, &iph, 0);
if (likely(cp))
- return handle_response(af, skb, pd, cp, iph.len);
+ return handle_response(af, skb, pd, cp, &iph);
if (sysctl_nat_icmp_send(net) &&
(pp->protocol == IPPROTO_TCP ||
pp->protocol == IPPROTO_UDP ||
@@ -1375,7 +1365,7 @@ ip_vs_in_icmp(struct sk_buff *skb, int *related, unsigned int hooknum)
/* The embedded headers contain source and dest in reverse order.
* For IPIP this is error for request, not for reply.
*/
- cp = pp->conn_in_get(AF_INET, skb, &ciph, offset, ipip ? 0 : 1);
+ cp = pp->conn_in_get(AF_INET, skb, &ciph, ipip ? 0 : 1);
if (!cp)
return NF_ACCEPT;
@@ -1444,7 +1434,7 @@ ignore_ipip:
ip_vs_in_stats(cp, skb);
if (IPPROTO_TCP == cih->protocol || IPPROTO_UDP == cih->protocol)
offset += 2 * sizeof(__u16);
- verdict = ip_vs_icmp_xmit(skb, cp, pp, offset, hooknum);
+ verdict = ip_vs_icmp_xmit(skb, cp, pp, offset, hooknum, &ciph);
out:
__ip_vs_conn_put(cp);
@@ -1453,8 +1443,8 @@ out:
}
#ifdef CONFIG_IP_VS_IPV6
-static int
-ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum)
+static int ip_vs_in_icmp_v6(struct sk_buff *skb, int *related,
+ unsigned int hooknum, struct ip_vs_iphdr *iph)
{
struct net *net = NULL;
struct ipv6hdr _ip6h, *ip6h;
@@ -1465,10 +1455,6 @@ ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum)
struct ip_vs_proto_data *pd;
unsigned int offs_ciph, verdict;
- struct ip_vs_iphdr iph_stack;
- struct ip_vs_iphdr *iph = &iph_stack;
- ip_vs_fill_iph_skb(AF_INET6, skb, iph);
-
*related = 1;
ic = frag_safe_skb_hp(skb, iph->len, sizeof(_icmph), &_icmph, iph);
@@ -1522,7 +1508,7 @@ ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum)
/* The embedded headers contain source and dest in reverse order
* if not from localhost
*/
- cp = pp->conn_in_get(AF_INET6, skb, &ciph, ciph.len,
+ cp = pp->conn_in_get(AF_INET6, skb, &ciph,
(hooknum == NF_INET_LOCAL_OUT) ? 0 : 1);
if (!cp)
@@ -1540,7 +1526,7 @@ ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum)
IPPROTO_SCTP == ciph.protocol)
offs_ciph = ciph.len + (2 * sizeof(__u16));
- verdict = ip_vs_icmp_xmit_v6(skb, cp, pp, offs_ciph, hooknum);
+ verdict = ip_vs_icmp_xmit_v6(skb, cp, pp, offs_ciph, hooknum, &ciph);
__ip_vs_conn_put(cp);
@@ -1610,7 +1596,8 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
}
if (unlikely(iph.protocol == IPPROTO_ICMPV6)) {
int related;
- int verdict = ip_vs_in_icmp_v6(skb, &related, hooknum);
+ int verdict = ip_vs_in_icmp_v6(skb, &related, hooknum,
+ &iph);
if (related)
return verdict;
@@ -1633,8 +1620,7 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
/*
* Check if the packet belongs to an existing connection entry
*/
- cp = pp->conn_in_get(af, skb, &iph, iph.len, 0);
-
+ cp = pp->conn_in_get(af, skb, &iph, 0);
if (unlikely(!cp) && !iph.fragoffs) {
/* No (second) fragments need to enter here, as nf_defrag_ipv6
* replayed fragment zero will already have created the cp
@@ -1642,7 +1628,7 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
int v;
/* Schedule and create new connection entry into &cp */
- if (!pp->conn_schedule(af, skb, pd, &v, &cp))
+ if (!pp->conn_schedule(af, skb, pd, &v, &cp, &iph))
return v;
}
@@ -1680,7 +1666,7 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
ip_vs_in_stats(cp, skb);
ip_vs_set_state(cp, IP_VS_DIR_INPUT, skb, pd);
if (cp->packet_xmit)
- ret = cp->packet_xmit(skb, cp, pp);
+ ret = cp->packet_xmit(skb, cp, pp, &iph);
/* do not touch skb anymore */
else {
IP_VS_DBG_RL("warning: packet_xmit is null");
@@ -1854,7 +1840,7 @@ ip_vs_forward_icmp_v6(unsigned int hooknum, struct sk_buff *skb,
if (!net_ipvs(net)->enable)
return NF_ACCEPT;
- return ip_vs_in_icmp_v6(skb, &r, hooknum);
+ return ip_vs_in_icmp_v6(skb, &r, hooknum, &iphdr);
}
#endif
diff --git a/net/netfilter/ipvs/ip_vs_proto_ah_esp.c b/net/netfilter/ipvs/ip_vs_proto_ah_esp.c
index 5b8eb8b..5de3dd3 100644
--- a/net/netfilter/ipvs/ip_vs_proto_ah_esp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_ah_esp.c
@@ -57,7 +57,7 @@ ah_esp_conn_fill_param_proto(struct net *net, int af,
static struct ip_vs_conn *
ah_esp_conn_in_get(int af, const struct sk_buff *skb,
- const struct ip_vs_iphdr *iph, unsigned int proto_off,
+ const struct ip_vs_iphdr *iph,
int inverse)
{
struct ip_vs_conn *cp;
@@ -85,9 +85,7 @@ ah_esp_conn_in_get(int af, const struct sk_buff *skb,
static struct ip_vs_conn *
ah_esp_conn_out_get(int af, const struct sk_buff *skb,
- const struct ip_vs_iphdr *iph,
- unsigned int proto_off,
- int inverse)
+ const struct ip_vs_iphdr *iph, int inverse)
{
struct ip_vs_conn *cp;
struct ip_vs_conn_param p;
@@ -110,7 +108,8 @@ ah_esp_conn_out_get(int af, const struct sk_buff *skb,
static int
ah_esp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
- int *verdict, struct ip_vs_conn **cpp)
+ int *verdict, struct ip_vs_conn **cpp,
+ struct ip_vs_iphdr *iph)
{
/*
* AH/ESP is only related traffic. Pass the packet to IP stack.
diff --git a/net/netfilter/ipvs/ip_vs_proto_sctp.c b/net/netfilter/ipvs/ip_vs_proto_sctp.c
index b903db6..746048b 100644
--- a/net/netfilter/ipvs/ip_vs_proto_sctp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c
@@ -10,28 +10,26 @@
static int
sctp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
- int *verdict, struct ip_vs_conn **cpp)
+ int *verdict, struct ip_vs_conn **cpp,
+ struct ip_vs_iphdr *iph)
{
struct net *net;
struct ip_vs_service *svc;
sctp_chunkhdr_t _schunkh, *sch;
sctp_sctphdr_t *sh, _sctph;
- struct ip_vs_iphdr iph;
- ip_vs_fill_iph_skb(af, skb, &iph);
-
- sh = skb_header_pointer(skb, iph.len, sizeof(_sctph), &_sctph);
+ sh = skb_header_pointer(skb, iph->len, sizeof(_sctph), &_sctph);
if (sh == NULL)
return 0;
- sch = skb_header_pointer(skb, iph.len + sizeof(sctp_sctphdr_t),
+ sch = skb_header_pointer(skb, iph->len + sizeof(sctp_sctphdr_t),
sizeof(_schunkh), &_schunkh);
if (sch == NULL)
return 0;
net = skb_net(skb);
if ((sch->type == SCTP_CID_INIT) &&
- (svc = ip_vs_service_get(net, af, skb->mark, iph.protocol,
- &iph.daddr, sh->dest))) {
+ (svc = ip_vs_service_get(net, af, skb->mark, iph->protocol,
+ &iph->daddr, sh->dest))) {
int ignored;
if (ip_vs_todrop(net_ipvs(net))) {
@@ -47,10 +45,10 @@ sctp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
* Let the virtual server select a real server for the
* incoming connection, and create a connection entry.
*/
- *cpp = ip_vs_schedule(svc, skb, pd, &ignored);
+ *cpp = ip_vs_schedule(svc, skb, pd, &ignored, iph);
if (!*cpp && ignored <= 0) {
if (!ignored)
- *verdict = ip_vs_leave(svc, skb, pd);
+ *verdict = ip_vs_leave(svc, skb, pd, iph);
else {
ip_vs_service_put(svc);
*verdict = NF_DROP;
@@ -64,20 +62,16 @@ sctp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
}
static int
-sctp_snat_handler(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
+sctp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
+ struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)
{
sctp_sctphdr_t *sctph;
- unsigned int sctphoff;
+ unsigned int sctphoff = iph->len;
struct sk_buff *iter;
__be32 crc32;
- struct ip_vs_iphdr iph;
- ip_vs_fill_iph_skb(cp->af, skb, &iph);
- sctphoff = iph.len;
-
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6 && iph.fragoffs)
+ if (cp->af == AF_INET6 && iph->fragoffs)
return 1;
#endif
@@ -110,20 +104,16 @@ sctp_snat_handler(struct sk_buff *skb,
}
static int
-sctp_dnat_handler(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
+sctp_dnat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
+ struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)
{
sctp_sctphdr_t *sctph;
- unsigned int sctphoff;
+ unsigned int sctphoff = iph->len;
struct sk_buff *iter;
__be32 crc32;
- struct ip_vs_iphdr iph;
- ip_vs_fill_iph_skb(cp->af, skb, &iph);
- sctphoff = iph.len;
-
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6 && iph.fragoffs)
+ if (cp->af == AF_INET6 && iph->fragoffs)
return 1;
#endif
diff --git a/net/netfilter/ipvs/ip_vs_proto_tcp.c b/net/netfilter/ipvs/ip_vs_proto_tcp.c
index 8a96069..9af653a 100644
--- a/net/netfilter/ipvs/ip_vs_proto_tcp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_tcp.c
@@ -33,16 +33,14 @@
static int
tcp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
- int *verdict, struct ip_vs_conn **cpp)
+ int *verdict, struct ip_vs_conn **cpp,
+ struct ip_vs_iphdr *iph)
{
struct net *net;
struct ip_vs_service *svc;
struct tcphdr _tcph, *th;
- struct ip_vs_iphdr iph;
- ip_vs_fill_iph_skb(af, skb, &iph);
-
- th = skb_header_pointer(skb, iph.len, sizeof(_tcph), &_tcph);
+ th = skb_header_pointer(skb, iph->len, sizeof(_tcph), &_tcph);
if (th == NULL) {
*verdict = NF_DROP;
return 0;
@@ -50,8 +48,8 @@ tcp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
net = skb_net(skb);
/* No !th->ack check to allow scheduling on SYN+ACK for Active FTP */
if (th->syn &&
- (svc = ip_vs_service_get(net, af, skb->mark, iph.protocol,
- &iph.daddr, th->dest))) {
+ (svc = ip_vs_service_get(net, af, skb->mark, iph->protocol,
+ &iph->daddr, th->dest))) {
int ignored;
if (ip_vs_todrop(net_ipvs(net))) {
@@ -68,10 +66,10 @@ tcp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
* Let the virtual server select a real server for the
* incoming connection, and create a connection entry.
*/
- *cpp = ip_vs_schedule(svc, skb, pd, &ignored);
+ *cpp = ip_vs_schedule(svc, skb, pd, &ignored, iph);
if (!*cpp && ignored <= 0) {
if (!ignored)
- *verdict = ip_vs_leave(svc, skb, pd);
+ *verdict = ip_vs_leave(svc, skb, pd, iph);
else {
ip_vs_service_put(svc);
*verdict = NF_DROP;
@@ -128,20 +126,16 @@ tcp_partial_csum_update(int af, struct tcphdr *tcph,
static int
-tcp_snat_handler(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
+tcp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
+ struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)
{
struct tcphdr *tcph;
- unsigned int tcphoff;
+ unsigned int tcphoff = iph->len;
int oldlen;
int payload_csum = 0;
- struct ip_vs_iphdr iph;
- ip_vs_fill_iph_skb(cp->af, skb, &iph);
- tcphoff = iph.len;
-
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6 && iph.fragoffs)
+ if (cp->af == AF_INET6 && iph->fragoffs)
return 1;
#endif
oldlen = skb->len - tcphoff;
@@ -210,20 +204,16 @@ tcp_snat_handler(struct sk_buff *skb,
static int
-tcp_dnat_handler(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
+tcp_dnat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
+ struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)
{
struct tcphdr *tcph;
- unsigned int tcphoff;
+ unsigned int tcphoff = iph->len;
int oldlen;
int payload_csum = 0;
- struct ip_vs_iphdr iph;
- ip_vs_fill_iph_skb(cp->af, skb, &iph);
- tcphoff = iph.len;
-
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6 && iph.fragoffs)
+ if (cp->af == AF_INET6 && iph->fragoffs)
return 1;
#endif
oldlen = skb->len - tcphoff;
diff --git a/net/netfilter/ipvs/ip_vs_proto_udp.c b/net/netfilter/ipvs/ip_vs_proto_udp.c
index d6f4eee..503a842 100644
--- a/net/netfilter/ipvs/ip_vs_proto_udp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_udp.c
@@ -30,23 +30,22 @@
static int
udp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
- int *verdict, struct ip_vs_conn **cpp)
+ int *verdict, struct ip_vs_conn **cpp,
+ struct ip_vs_iphdr *iph)
{
struct net *net;
struct ip_vs_service *svc;
struct udphdr _udph, *uh;
- struct ip_vs_iphdr iph;
- ip_vs_fill_iph_skb(af, skb, &iph);
-
- uh = skb_header_pointer(skb, iph.len, sizeof(_udph), &_udph);
+ /* IPv6 fragments, only first fragment will hit this */
+ uh = skb_header_pointer(skb, iph->len, sizeof(_udph), &_udph);
if (uh == NULL) {
*verdict = NF_DROP;
return 0;
}
net = skb_net(skb);
- svc = ip_vs_service_get(net, af, skb->mark, iph.protocol,
- &iph.daddr, uh->dest);
+ svc = ip_vs_service_get(net, af, skb->mark, iph->protocol,
+ &iph->daddr, uh->dest);
if (svc) {
int ignored;
@@ -64,10 +63,10 @@ udp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
* Let the virtual server select a real server for the
* incoming connection, and create a connection entry.
*/
- *cpp = ip_vs_schedule(svc, skb, pd, &ignored);
+ *cpp = ip_vs_schedule(svc, skb, pd, &ignored, iph);
if (!*cpp && ignored <= 0) {
if (!ignored)
- *verdict = ip_vs_leave(svc, skb, pd);
+ *verdict = ip_vs_leave(svc, skb, pd, iph);
else {
ip_vs_service_put(svc);
*verdict = NF_DROP;
@@ -125,20 +124,16 @@ udp_partial_csum_update(int af, struct udphdr *uhdr,
static int
-udp_snat_handler(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
+udp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
+ struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)
{
struct udphdr *udph;
- unsigned int udphoff;
+ unsigned int udphoff = iph->len;
int oldlen;
int payload_csum = 0;
- struct ip_vs_iphdr iph;
- ip_vs_fill_iph_skb(cp->af, skb, &iph);
- udphoff = iph.len;
-
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6 && iph.fragoffs)
+ if (cp->af == AF_INET6 && iph->fragoffs)
return 1;
#endif
oldlen = skb->len - udphoff;
@@ -212,20 +207,16 @@ udp_snat_handler(struct sk_buff *skb,
static int
-udp_dnat_handler(struct sk_buff *skb,
- struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
+udp_dnat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
+ struct ip_vs_conn *cp, struct ip_vs_iphdr *iph)
{
struct udphdr *udph;
- unsigned int udphoff;
+ unsigned int udphoff = iph->len;
int oldlen;
int payload_csum = 0;
- struct ip_vs_iphdr iph;
- ip_vs_fill_iph_skb(cp->af, skb, &iph);
- udphoff = iph.len;
-
#ifdef CONFIG_IP_VS_IPV6
- if (cp->af == AF_INET6 && iph.fragoffs)
+ if (cp->af == AF_INET6 && iph->fragoffs)
return 1;
#endif
oldlen = skb->len - udphoff;
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index e44933f..90122eb 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -424,7 +424,7 @@ do { \
*/
int
ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *ipvsh)
{
/* we do not touch skb and do not need pskb ptr */
IP_VS_XMIT(NFPROTO_IPV4, skb, cp, 1);
@@ -438,7 +438,7 @@ ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
*/
int
ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *ipvsh)
{
struct rtable *rt; /* Route to the other host */
struct iphdr *iph = ip_hdr(skb);
@@ -493,17 +493,16 @@ ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
#ifdef CONFIG_IP_VS_IPV6
int
ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph)
{
struct rt6_info *rt; /* Route to the other host */
- struct ip_vs_iphdr iph;
int mtu;
EnterFunction(10);
- ip_vs_fill_iph_skb(cp->af, skb, &iph);
- if (!(rt = __ip_vs_get_out_rt_v6(skb, NULL, &iph.daddr.in6, NULL, 0,
- IP_VS_RT_MODE_NON_LOCAL)))
+ rt = __ip_vs_get_out_rt_v6(skb, NULL, &iph->daddr.in6, NULL, 0,
+ IP_VS_RT_MODE_NON_LOCAL);
+ if (!rt)
goto tx_error_icmp;
/* MTU checking */
@@ -515,7 +514,7 @@ ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
skb->dev = net->loopback_dev;
}
/* only send ICMP too big on first fragment */
- if (!iph.fragoffs)
+ if (!iph->fragoffs)
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
dst_release(&rt->dst);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
@@ -559,7 +558,7 @@ ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
*/
int
ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *ipvsh)
{
struct rtable *rt; /* Route to the other host */
int mtu;
@@ -629,7 +628,7 @@ ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
goto tx_error_put;
/* mangle the packet */
- if (pp->dnat_handler && !pp->dnat_handler(skb, pp, cp))
+ if (pp->dnat_handler && !pp->dnat_handler(skb, pp, cp, ipvsh))
goto tx_error_put;
ip_hdr(skb)->daddr = cp->daddr.ip;
ip_send_check(ip_hdr(skb));
@@ -677,20 +676,18 @@ ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
#ifdef CONFIG_IP_VS_IPV6
int
ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph)
{
struct rt6_info *rt; /* Route to the other host */
int mtu;
int local;
- struct ip_vs_iphdr iph;
EnterFunction(10);
- ip_vs_fill_iph_skb(cp->af, skb, &iph);
/* check if it is a connection of no-client-port */
- if (unlikely(cp->flags & IP_VS_CONN_F_NO_CPORT && !iph.fragoffs)) {
+ if (unlikely(cp->flags & IP_VS_CONN_F_NO_CPORT && !iph->fragoffs)) {
__be16 _pt, *p;
- p = skb_header_pointer(skb, iph.len, sizeof(_pt), &_pt);
+ p = skb_header_pointer(skb, iph->len, sizeof(_pt), &_pt);
if (p == NULL)
goto tx_error;
ip_vs_conn_fill_cport(cp, *p);
@@ -739,7 +736,7 @@ ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
skb->dev = net->loopback_dev;
}
/* only send ICMP too big on first fragment */
- if (!iph.fragoffs)
+ if (!iph->fragoffs)
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
IP_VS_DBG_RL_PKT(0, AF_INET6, pp, skb, 0,
"ip_vs_nat_xmit_v6(): frag needed for");
@@ -754,7 +751,7 @@ ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
goto tx_error_put;
/* mangle the packet */
- if (pp->dnat_handler && !pp->dnat_handler(skb, pp, cp))
+ if (pp->dnat_handler && !pp->dnat_handler(skb, pp, cp, iph))
goto tx_error;
ipv6_hdr(skb)->daddr = cp->daddr.in6;
@@ -815,7 +812,7 @@ tx_error_put:
*/
int
ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *ipvsh)
{
struct netns_ipvs *ipvs = net_ipvs(skb_net(skb));
struct rtable *rt; /* Route to the other host */
@@ -935,7 +932,7 @@ tx_error_put:
#ifdef CONFIG_IP_VS_IPV6
int
ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *ipvsh)
{
struct rt6_info *rt; /* Route to the other host */
struct in6_addr saddr; /* Source for tunnel */
@@ -945,10 +942,8 @@ ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
unsigned int max_headroom; /* The extra header space needed */
int mtu;
int ret;
- struct ip_vs_iphdr ipvsh;
EnterFunction(10);
- ip_vs_fill_iph_skb(cp->af, skb, &ipvsh);
if (!(rt = __ip_vs_get_out_rt_v6(skb, cp->dest, &cp->daddr.in6,
&saddr, 1, (IP_VS_RT_MODE_LOCAL |
@@ -978,7 +973,7 @@ ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
skb->dev = net->loopback_dev;
}
/* only send ICMP too big on first fragment */
- if (!ipvsh.fragoffs)
+ if (!ipvsh->fragoffs)
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
goto tx_error_put;
@@ -1060,7 +1055,7 @@ tx_error_put:
*/
int
ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *ipvsh)
{
struct rtable *rt; /* Route to the other host */
struct iphdr *iph = ip_hdr(skb);
@@ -1121,14 +1116,12 @@ ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
#ifdef CONFIG_IP_VS_IPV6
int
ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp)
+ struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph)
{
struct rt6_info *rt; /* Route to the other host */
int mtu;
- struct ip_vs_iphdr iph;
EnterFunction(10);
- ip_vs_fill_iph_skb(cp->af, skb, &iph);
if (!(rt = __ip_vs_get_out_rt_v6(skb, cp->dest, &cp->daddr.in6, NULL,
0, (IP_VS_RT_MODE_LOCAL |
@@ -1148,7 +1141,7 @@ ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
skb->dev = net->loopback_dev;
}
/* only send ICMP too big on first fragment */
- if (!iph.fragoffs)
+ if (!iph->fragoffs)
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
dst_release(&rt->dst);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
@@ -1193,7 +1186,8 @@ tx_error:
*/
int
ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp, int offset, unsigned int hooknum)
+ struct ip_vs_protocol *pp, int offset, unsigned int hooknum,
+ struct ip_vs_iphdr *iph)
{
struct rtable *rt; /* Route to the other host */
int mtu;
@@ -1208,7 +1202,7 @@ ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
translate address/port back */
if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ) {
if (cp->packet_xmit)
- rc = cp->packet_xmit(skb, cp, pp);
+ rc = cp->packet_xmit(skb, cp, pp, iph);
else
rc = NF_ACCEPT;
/* do not touch skb anymore */
@@ -1314,24 +1308,23 @@ ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
#ifdef CONFIG_IP_VS_IPV6
int
ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
- struct ip_vs_protocol *pp, int offset, unsigned int hooknum)
+ struct ip_vs_protocol *pp, int offset, unsigned int hooknum,
+ struct ip_vs_iphdr *iph)
{
struct rt6_info *rt; /* Route to the other host */
int mtu;
int rc;
int local;
int rt_mode;
- struct ip_vs_iphdr iph;
EnterFunction(10);
- ip_vs_fill_iph_skb(cp->af, skb, &iph);
/* The ICMP packet for VS/TUN, VS/DR and LOCALNODE will be
forwarded directly here, because there is no need to
translate address/port back */
if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ) {
if (cp->packet_xmit)
- rc = cp->packet_xmit(skb, cp, pp);
+ rc = cp->packet_xmit(skb, cp, pp, iph);
else
rc = NF_ACCEPT;
/* do not touch skb anymore */
@@ -1388,7 +1381,7 @@ ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
skb->dev = net->loopback_dev;
}
/* only send ICMP too big on first fragment */
- if (!iph.fragoffs)
+ if (!iph->fragoffs)
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
IP_VS_DBG_RL("%s(): frag needed\n", __func__);
goto tx_error_put;
diff --git a/net/netfilter/xt_ipvs.c b/net/netfilter/xt_ipvs.c
index 3f9b8cd..8d47c37 100644
--- a/net/netfilter/xt_ipvs.c
+++ b/net/netfilter/xt_ipvs.c
@@ -85,7 +85,7 @@ ipvs_mt(const struct sk_buff *skb, struct xt_action_param *par)
/*
* Check if the packet belongs to an existing entry
*/
- cp = pp->conn_out_get(family, skb, &iph, iph.len, 1 /* inverse */);
+ cp = pp->conn_out_get(family, skb, &iph, 1 /* inverse */);
if (unlikely(cp == NULL)) {
match = false;
goto out;
^ permalink raw reply related [flat|nested] 12+ messages in thread