diff options
| author | Patrick McHardy <kaber@trash.net> | 2012-08-26 19:14:08 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-08-30 03:00:15 +0200 |
| commit | 0ad352cb433ed2b05921a32b5ee20410512e2320 (patch) | |
| tree | 9d697d3f05b04904411e4d0e2656fcc5928b428d /net/ipv6 | |
| parent | c7232c9979cba684c50b64c513c4a83c9aa70563 (diff) | |
netfilter: ipv6: expand skb head in ip6_route_me_harder after oif change
Expand the skb headroom if the oif changed due to rerouting similar to
how IPv4 packets are handled.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/netfilter.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c index db31561cc8d..429089cb073 100644 --- a/net/ipv6/netfilter.c +++ b/net/ipv6/netfilter.c @@ -15,6 +15,7 @@ int ip6_route_me_harder(struct sk_buff *skb) { struct net *net = dev_net(skb_dst(skb)->dev); const struct ipv6hdr *iph = ipv6_hdr(skb); + unsigned int hh_len; struct dst_entry *dst; struct flowi6 fl6 = { .flowi6_oif = skb->sk ? skb->sk->sk_bound_dev_if : 0, @@ -47,6 +48,13 @@ int ip6_route_me_harder(struct sk_buff *skb) } #endif + /* Change in oif may mean change in hh_len. */ + hh_len = skb_dst(skb)->dev->hard_header_len; + if (skb_headroom(skb) < hh_len && + pskb_expand_head(skb, HH_DATA_ALIGN(hh_len - skb_headroom(skb)), + 0, GFP_ATOMIC)) + return -1; + return 0; } EXPORT_SYMBOL(ip6_route_me_harder); |