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udp: increase inner ip header ID during segmentation 

Similar to GRE tunnel, UDP tunnel should take care of IP header ID
too.

Cc: Pravin B Shelar <pshelar@nicira.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cong Wang 2013-03-22 00:31:32 +00:00 committed by David S. Miller
parent 10c0d7ed32
commit d6a8c36dd6
1 changed files with 6 additions and 1 deletions
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7
net/ipv4/udp.c
View File

@ -2304,7 +2304,8 @@ static struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
struct sk_buff *segs = ERR_PTR(-EINVAL);
int mac_len = skb->mac_len;
int tnl_hlen = skb_inner_mac_header(skb) - skb_transport_header(skb);
int outer_hlen;
int outer_hlen, id;
struct iphdr *iph;
netdev_features_t enc_features;
if (unlikely(!pskb_may_pull(skb, tnl_hlen)))
@ -2315,6 +2316,8 @@ static struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
skb_reset_mac_header(skb);
skb_set_network_header(skb, skb_inner_network_offset(skb));
skb->mac_len = skb_inner_network_offset(skb);
iph = ip_hdr(skb);
id = ntohs(iph->id);
/* segment inner packet. */
enc_features = skb->dev->hw_enc_features & netif_skb_features(skb);
@ -2329,6 +2332,8 @@ static struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
int udp_offset = outer_hlen - tnl_hlen;
skb->mac_len = mac_len;
iph = (struct iphdr *)skb_inner_network_header(skb);
iph->id = htons(id++);
skb_push(skb, outer_hlen);
skb_reset_mac_header(skb);