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authorAlexander Duyck <alexander.h.duyck@redhat.com>2014-11-24 20:08:32 -0800
committerDavid S. Miller <davem@davemloft.net>2014-11-25 14:12:12 -0500
commitf3750817a9034bd8cbb5ba583cd544e7cf14c7d8 (patch)
tree6191a9b166fdc589aba9aa206eb65030c31d50ce
parent138a7f49270fde7547afe976a01cef2b9fbf3a0e (diff)
ip6_udp_tunnel: Fix checksum calculation
The UDP checksum calculation for VXLAN tunnels is currently using the socket addresses instead of the actual packet source and destination addresses. As a result the checksum calculated is incorrect in some cases. Also uh->check was being set twice, first it was set to 0, and then it is set again in udp6_set_csum. This change removes the redundant assignment to 0. Fixes: acbf74a7 ("vxlan: Refactor vxlan driver to make use of the common UDP tunnel functions.") Cc: Andy Zhou <azhou@nicira.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv6/ip6_udp_tunnel.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c
index b04ed72c454..8db6c98fe21 100644
--- a/net/ipv6/ip6_udp_tunnel.c
+++ b/net/ipv6/ip6_udp_tunnel.c
@@ -79,15 +79,13 @@ int udp_tunnel6_xmit_skb(struct socket *sock, struct dst_entry *dst,
uh->source = src_port;
uh->len = htons(skb->len);
- uh->check = 0;
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
| IPSKB_REROUTED);
skb_dst_set(skb, dst);
- udp6_set_csum(udp_get_no_check6_tx(sk), skb, &inet6_sk(sk)->saddr,
- &sk->sk_v6_daddr, skb->len);
+ udp6_set_csum(udp_get_no_check6_tx(sk), skb, saddr, daddr, skb->len);
__skb_push(skb, sizeof(*ip6h));
skb_reset_network_header(skb);