diff options
| author | Steffen Klassert <steffen.klassert@secunet.com> | 2008-06-18 03:37:13 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-06-18 03:38:23 +0400 |
| commit | fe833fca2eac6b3d3ad5e35f44ad4638362f1da8 (patch) | |
| tree | 5069eb9f5b9c9f881fb42dc0e2c347ef7b45036f /net/ipv4/xfrm4_mode_tunnel.c | |
| parent | a56b8f81580761c65e4d8d0c04ac1cb7a788bdf1 (diff) | |
| download | linux-fe833fca2eac6b3d3ad5e35f44ad4638362f1da8.tar.xz | |
xfrm: fix fragmentation for ipv4 xfrm tunnel
When generating the ip header for the transformed packet we just copy
the frag_off field of the ip header from the original packet to the ip
header of the new generated packet. If we receive a packet as a chain
of fragments, all but the last of the new generated packets have the
IP_MF flag set. We have to mask the frag_off field to only keep the
IP_DF flag from the original packet. This got lost with git commit
36cf9acf93e8561d9faec24849e57688a81eb9c5 ("[IPSEC]: Separate
inner/outer mode processing on output")
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/xfrm4_mode_tunnel.c')
| -rw-r--r-- | net/ipv4/xfrm4_mode_tunnel.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c index 584e6d74e3a9..7135279f3f84 100644 --- a/net/ipv4/xfrm4_mode_tunnel.c +++ b/net/ipv4/xfrm4_mode_tunnel.c @@ -52,7 +52,7 @@ static int xfrm4_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb) IP_ECN_clear(top_iph); top_iph->frag_off = (flags & XFRM_STATE_NOPMTUDISC) ? - 0 : XFRM_MODE_SKB_CB(skb)->frag_off; + 0 : (XFRM_MODE_SKB_CB(skb)->frag_off & htons(IP_DF)); ip_select_ident(top_iph, dst->child, NULL); top_iph->ttl = dst_metric(dst->child, RTAX_HOPLIMIT); |