Commit 815afe17 authored Oct 18, 2014 by Eric Dumazet Committed by David S. Miller Oct 18, 2014

tcp: fix build error if IPv6 is not enabled



$ make M=net/ipv4
  CC      net/ipv4/route.o
In file included from net/ipv4/route.c:102:0:
include/net/tcp.h: In function ‘tcp_v6_iif’:
include/net/tcp.h:738:32: error: ‘union <anonymous>’ has no member named ‘h6’
  return TCP_SKB_CB(skb)->header.h6.iif;

Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: 870c3151 ("ipv6: introduce tcp_v6_iif()")
Signed-off-by: David S. Miller <davem@davemloft.net>

parent f2d9da1a

include/net/tcp.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -730,6 +730,7 @@ struct tcp_skb_cb {
		#define TCP_SKB_CB(__skb) ((struct tcp_skb_cb *)&((__skb)->cb[0]))


		#if IS_ENABLED(CONFIG_IPV6)
		/* This is the variant of inet6_iif() that must be used by TCP,
		* as TCP moves IP6CB into a different location in skb->cb[]
		*/
		@@ -737,6 +738,7 @@ static inline int tcp_v6_iif(const struct sk_buff *skb)
		{
		return TCP_SKB_CB(skb)->header.h6.iif;
		}
		#endif

		/* Due to TSO, an SKB can be composed of multiple actual
		* packets. To keep these tracked properly, we use this.