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| author | Pravin B Shelar <pshelar@nicira.com> | 2013-02-22 08:30:30 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-25 21:47:41 +0100 |
| commit | 490ab08127cebc25e3a260a74556b56ce5f47c0f (patch) | |
| tree | 61a662927a56a72ae7d567728edae1ce2bc9c8c5 /net/ipv4 | |
| parent | Merge branch 'wireless' (diff) | |
| download | linux-490ab08127cebc25e3a260a74556b56ce5f47c0f.tar.xz linux-490ab08127cebc25e3a260a74556b56ce5f47c0f.zip | |
IP_GRE: Fix IP-Identification.
GRE-GSO generates ip fragments with id 0,2,3,4... for every
GSO packet, which is not correct. Following patch fixes it
by setting ip-header id unique id of fragments are allowed.
As Eric Dumazet suggested it is optimized by using inner ip-header
whenever inner packet is ipv4.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/af_inet.c | 6 | ||||
| -rw-r--r-- | net/ipv4/ip_gre.c | 3 |
2 files changed, 6 insertions, 3 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 15847e19b7dd..68f6a94f7661 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1332,8 +1332,10 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, if (skb->next != NULL) iph->frag_off |= htons(IP_MF); offset += (skb->len - skb->mac_len - iph->ihl * 4); - } else - iph->id = htons(id++); + } else { + if (!(iph->frag_off & htons(IP_DF))) + iph->id = htons(id++); + } iph->tot_len = htons(skb->len - skb->mac_len); iph->check = 0; iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl); diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 5ef4da780ac1..b8bada00d516 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -970,7 +970,8 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev iph->daddr = fl4.daddr; iph->saddr = fl4.saddr; iph->ttl = ttl; - iph->id = 0; + + tunnel_ip_select_ident(skb, old_iph, &rt->dst); if (ttl == 0) { if (skb->protocol == htons(ETH_P_IP)) |