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path: root/net/ipv4/ipvs/ip_vs_proto_tcp.c
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Diffstat (limited to 'net/ipv4/ipvs/ip_vs_proto_tcp.c')
-rw-r--r--net/ipv4/ipvs/ip_vs_proto_tcp.c85
1 files changed, 68 insertions, 17 deletions
diff --git a/net/ipv4/ipvs/ip_vs_proto_tcp.c b/net/ipv4/ipvs/ip_vs_proto_tcp.c
index 9211afa8f30..3daae43ae44 100644
--- a/net/ipv4/ipvs/ip_vs_proto_tcp.c
+++ b/net/ipv4/ipvs/ip_vs_proto_tcp.c
@@ -114,11 +114,21 @@ tcp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_protocol *pp,
static inline void
-tcp_fast_csum_update(struct tcphdr *tcph, __be32 oldip, __be32 newip,
+tcp_fast_csum_update(int af, struct tcphdr *tcph,
+ const union nf_inet_addr *oldip,
+ const union nf_inet_addr *newip,
__be16 oldport, __be16 newport)
{
+#ifdef CONFIG_IP_VS_IPV6
+ if (af == AF_INET6)
+ tcph->check =
+ csum_fold(ip_vs_check_diff16(oldip->ip6, newip->ip6,
+ ip_vs_check_diff2(oldport, newport,
+ ~csum_unfold(tcph->check))));
+ else
+#endif
tcph->check =
- csum_fold(ip_vs_check_diff4(oldip, newip,
+ csum_fold(ip_vs_check_diff4(oldip->ip, newip->ip,
ip_vs_check_diff2(oldport, newport,
~csum_unfold(tcph->check))));
}
@@ -129,7 +139,14 @@ tcp_snat_handler(struct sk_buff *skb,
struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
{
struct tcphdr *tcph;
- const unsigned int tcphoff = ip_hdrlen(skb);
+ unsigned int tcphoff;
+
+#ifdef CONFIG_IP_VS_IPV6
+ if (cp->af == AF_INET6)
+ tcphoff = sizeof(struct ipv6hdr);
+ else
+#endif
+ tcphoff = ip_hdrlen(skb);
/* csum_check requires unshared skb */
if (!skb_make_writable(skb, tcphoff+sizeof(*tcph)))
@@ -137,7 +154,7 @@ tcp_snat_handler(struct sk_buff *skb,
if (unlikely(cp->app != NULL)) {
/* Some checks before mangling */
- if (pp->csum_check && !pp->csum_check(AF_INET, skb, pp))
+ if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
return 0;
/* Call application helper if needed */
@@ -145,13 +162,13 @@ tcp_snat_handler(struct sk_buff *skb,
return 0;
}
- tcph = (void *)ip_hdr(skb) + tcphoff;
+ tcph = (void *)skb_network_header(skb) + tcphoff;
tcph->source = cp->vport;
/* Adjust TCP checksums */
if (!cp->app) {
/* Only port and addr are changed, do fast csum update */
- tcp_fast_csum_update(tcph, cp->daddr.ip, cp->vaddr.ip,
+ tcp_fast_csum_update(cp->af, tcph, &cp->daddr, &cp->vaddr,
cp->dport, cp->vport);
if (skb->ip_summed == CHECKSUM_COMPLETE)
skb->ip_summed = CHECKSUM_NONE;
@@ -159,9 +176,20 @@ tcp_snat_handler(struct sk_buff *skb,
/* full checksum calculation */
tcph->check = 0;
skb->csum = skb_checksum(skb, tcphoff, skb->len - tcphoff, 0);
- tcph->check = csum_tcpudp_magic(cp->vaddr.ip, cp->caddr.ip,
- skb->len - tcphoff,
- cp->protocol, skb->csum);
+#ifdef CONFIG_IP_VS_IPV6
+ if (cp->af == AF_INET6)
+ tcph->check = csum_ipv6_magic(&cp->vaddr.in6,
+ &cp->caddr.in6,
+ skb->len - tcphoff,
+ cp->protocol, skb->csum);
+ else
+#endif
+ tcph->check = csum_tcpudp_magic(cp->vaddr.ip,
+ cp->caddr.ip,
+ skb->len - tcphoff,
+ cp->protocol,
+ skb->csum);
+
IP_VS_DBG(11, "O-pkt: %s O-csum=%d (+%zd)\n",
pp->name, tcph->check,
(char*)&(tcph->check) - (char*)tcph);
@@ -175,7 +203,14 @@ tcp_dnat_handler(struct sk_buff *skb,
struct ip_vs_protocol *pp, struct ip_vs_conn *cp)
{
struct tcphdr *tcph;
- const unsigned int tcphoff = ip_hdrlen(skb);
+ unsigned int tcphoff;
+
+#ifdef CONFIG_IP_VS_IPV6
+ if (cp->af == AF_INET6)
+ tcphoff = sizeof(struct ipv6hdr);
+ else
+#endif
+ tcphoff = ip_hdrlen(skb);
/* csum_check requires unshared skb */
if (!skb_make_writable(skb, tcphoff+sizeof(*tcph)))
@@ -183,7 +218,7 @@ tcp_dnat_handler(struct sk_buff *skb,
if (unlikely(cp->app != NULL)) {
/* Some checks before mangling */
- if (pp->csum_check && !pp->csum_check(AF_INET, skb, pp))
+ if (pp->csum_check && !pp->csum_check(cp->af, skb, pp))
return 0;
/*
@@ -194,7 +229,7 @@ tcp_dnat_handler(struct sk_buff *skb,
return 0;
}
- tcph = (void *)ip_hdr(skb) + tcphoff;
+ tcph = (void *)skb_network_header(skb) + tcphoff;
tcph->dest = cp->dport;
/*
@@ -202,7 +237,7 @@ tcp_dnat_handler(struct sk_buff *skb,
*/
if (!cp->app) {
/* Only port and addr are changed, do fast csum update */
- tcp_fast_csum_update(tcph, cp->vaddr.ip, cp->daddr.ip,
+ tcp_fast_csum_update(cp->af, tcph, &cp->vaddr, &cp->daddr,
cp->vport, cp->dport);
if (skb->ip_summed == CHECKSUM_COMPLETE)
skb->ip_summed = CHECKSUM_NONE;
@@ -210,9 +245,19 @@ tcp_dnat_handler(struct sk_buff *skb,
/* full checksum calculation */
tcph->check = 0;
skb->csum = skb_checksum(skb, tcphoff, skb->len - tcphoff, 0);
- tcph->check = csum_tcpudp_magic(cp->caddr.ip, cp->daddr.ip,
- skb->len - tcphoff,
- cp->protocol, skb->csum);
+#ifdef CONFIG_IP_VS_IPV6
+ if (cp->af == AF_INET6)
+ tcph->check = csum_ipv6_magic(&cp->caddr.in6,
+ &cp->daddr.in6,
+ skb->len - tcphoff,
+ cp->protocol, skb->csum);
+ else
+#endif
+ tcph->check = csum_tcpudp_magic(cp->caddr.ip,
+ cp->daddr.ip,
+ skb->len - tcphoff,
+ cp->protocol,
+ skb->csum);
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
return 1;
@@ -487,7 +532,13 @@ tcp_state_transition(struct ip_vs_conn *cp, int direction,
{
struct tcphdr _tcph, *th;
- th = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_tcph), &_tcph);
+#ifdef CONFIG_IP_VS_IPV6
+ int ihl = cp->af == AF_INET ? ip_hdrlen(skb) : sizeof(struct ipv6hdr);
+#else
+ int ihl = ip_hdrlen(skb);
+#endif
+
+ th = skb_header_pointer(skb, ihl, sizeof(_tcph), &_tcph);
if (th == NULL)
return 0;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-25 04:17:02 +0000