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authorVlad Yasevich <vyasevic@redhat.com>2012-11-15 12:49:17 +0400
committerDavid S. Miller <davem@davemloft.net>2012-11-16 02:36:18 +0400
commit8663e02aba154e04679c9bb1665af52021d32547 (patch)
tree901900f79125e60134c2663b409c2d8170870dfb /include/net/ip6_checksum.h
parentd1da932ed4ecad2a14cbcc01ed589d617d0f0f09 (diff)
downloadlinux-8663e02aba154e04679c9bb1665af52021d32547.tar.xz
ipv6: Separate tcp offload functionality
Pull TCPv6 offload functionality into its won file in preparation for moving it out of the module. Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ip6_checksum.h')
-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 @@
#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