diff options
| author | Ansis Atteka <aatteka@nicira.com> | 2013-09-19 00:29:53 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-09-19 20:11:15 +0200 |
| commit | 703133de331a7a7df47f31fb9de51dc6f68a9de8 (patch) | |
| tree | 0c6c49e15c9461cd3a563d17062a866d2fafd6fa /net/ipv4/ipmr.c | |
| parent | ip: use ip_hdr() in __ip_make_skb() to retrieve IP header (diff) | |
| download | linux-703133de331a7a7df47f31fb9de51dc6f68a9de8.tar.xz linux-703133de331a7a7df47f31fb9de51dc6f68a9de8.zip | |
ip: generate unique IP identificator if local fragmentation is allowed
If local fragmentation is allowed, then ip_select_ident() and
ip_select_ident_more() need to generate unique IDs to ensure
correct defragmentation on the peer.
For example, if IPsec (tunnel mode) has to encrypt large skbs
that have local_df bit set, then all IP fragments that belonged
to different ESP datagrams would have used the same identificator.
If one of these IP fragments would get lost or reordered, then
peer could possibly stitch together wrong IP fragments that did
not belong to the same datagram. This would lead to a packet loss
or data corruption.
Signed-off-by: Ansis Atteka <aatteka@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipmr.c')
| -rw-r--r-- | net/ipv4/ipmr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 9ae54b09254f..62212c772a4b 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -1658,7 +1658,7 @@ static void ip_encap(struct sk_buff *skb, __be32 saddr, __be32 daddr) iph->protocol = IPPROTO_IPIP; iph->ihl = 5; iph->tot_len = htons(skb->len); - ip_select_ident(iph, skb_dst(skb), NULL); + ip_select_ident(skb, skb_dst(skb), NULL); ip_send_check(iph); memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |