ipv6: gre: fix wrong skb->protocol in WCCP

When using GRE redirection in WCCP, it sets the wrong skb->protocol,
that is, ETH_P_IP instead of ETH_P_IPV6 for the encapuslated traffic.

Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Cc: Dmitry Kozlov <xeb@mail.ru>
Signed-off-by: Yuri Chislov <yuri.chislov@gmail.com>
Tested-by: Yuri Chislov <yuri.chislov@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 4564e1f..0e32d2e 100644 (file)
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -502,11 +502,11 @@ static int ip6gre_rcv(struct sk_buff *skb)
 
                skb->protocol = gre_proto;
                /* WCCP version 1 and 2 protocol decoding.
-                * - Change protocol to IP
+                * - Change protocol to IPv6
                 * - When dealing with WCCPv2, Skip extra 4 bytes in GRE header
                 */
                if (flags == 0 && gre_proto == htons(ETH_P_WCCP)) {
-                       skb->protocol = htons(ETH_P_IP);
+                       skb->protocol = htons(ETH_P_IPV6);
                        if ((*(h + offset) & 0xF0) != 0x40)
                                offset += 4;
                }