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-rw-r--r--include/net/ip6_checksum.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/include/net/ip6_checksum.h b/include/net/ip6_checksum.h
index bc1b0fda2b04..652d3d309357 100644
--- a/include/net/ip6_checksum.h
+++ b/include/net/ip6_checksum.h
@@ -31,6 +31,8 @@
31#include <net/ip.h> 31#include <net/ip.h>
32#include <asm/checksum.h> 32#include <asm/checksum.h>
33#include <linux/in6.h> 33#include <linux/in6.h>
34#include <linux/tcp.h>
35#include <linux/ipv6.h>
34 36
35#ifndef _HAVE_ARCH_IPV6_CSUM 37#ifndef _HAVE_ARCH_IPV6_CSUM
36 38
@@ -91,4 +93,37 @@ static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
91} 93}
92 94
93#endif 95#endif
96
97static __inline__ __sum16 tcp_v6_check(int len,
98 const struct in6_addr *saddr,
99 const struct in6_addr *daddr,
100 __wsum base)
101{
102 return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base);
103}
104
105static inline void __tcp_v6_send_check(struct sk_buff *skb,
106 const struct in6_addr *saddr,
107 const struct in6_addr *daddr)
108{
109 struct tcphdr *th = tcp_hdr(skb);
110
111 if (skb->ip_summed == CHECKSUM_PARTIAL) {
112 th->check = ~tcp_v6_check(skb->len, saddr, daddr, 0);
113 skb->csum_start = skb_transport_header(skb) - skb->head;
114 skb->csum_offset = offsetof(struct tcphdr, check);
115 } else {
116 th->check = tcp_v6_check(skb->len, saddr, daddr,
117 csum_partial(th, th->doff << 2,
118 skb->csum));
119 }
120}
121
122static inline void tcp_v6_send_check(struct sock *sk, struct sk_buff *skb)
123{
124 struct ipv6_pinfo *np = inet6_sk(sk);
125
126 __tcp_v6_send_check(skb, &np->saddr, &np->daddr);
127}
128
94#endif 129#endif