diff options
Diffstat (limited to 'include/net/ip6_checksum.h')
| -rw-r--r-- | include/net/ip6_checksum.h | 35 |
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 @@ #include <net/ip.h> #include <asm/checksum.h> #include <linux/in6.h> +#include <linux/tcp.h> +#include <linux/ipv6.h> #ifndef _HAVE_ARCH_IPV6_CSUM @@ -91,4 +93,37 @@ static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr, } #endif + +static __inline__ __sum16 tcp_v6_check(int len, + const struct in6_addr *saddr, + const struct in6_addr *daddr, + __wsum base) +{ + return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base); +} + +static inline void __tcp_v6_send_check(struct sk_buff *skb, + const struct in6_addr *saddr, + const struct in6_addr *daddr) +{ + struct tcphdr *th = tcp_hdr(skb); + + if (skb->ip_summed == CHECKSUM_PARTIAL) { + th->check = ~tcp_v6_check(skb->len, saddr, daddr, 0); + skb->csum_start = skb_transport_header(skb) - skb->head; + skb->csum_offset = offsetof(struct tcphdr, check); + } else { + th->check = tcp_v6_check(skb->len, saddr, daddr, + csum_partial(th, th->doff << 2, + skb->csum)); + } +} + +static inline void tcp_v6_send_check(struct sock *sk, struct sk_buff *skb) +{ + struct ipv6_pinfo *np = inet6_sk(sk); + + __tcp_v6_send_check(skb, &np->saddr, &np->daddr); +} + #endif |