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Commit d6a8c36d authored by Cong Wang's avatar Cong Wang Committed by David S. Miller
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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: default avatarCong Wang <amwang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 10c0d7ed

net/ipv4/udp.c

+6 −1
Original line number Diff line number Diff line
@@ -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);