summaryrefslogtreecommitdiffstats
path: root/net/ipv4/ipip.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4/ipip.c')
-rw-r--r--net/ipv4/ipip.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 2d0f99bf61b3..715338a1b205 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -348,9 +348,6 @@ static int ipip_err(struct sk_buff *skb, u32 info)
case ICMP_PORT_UNREACH:
/* Impossible event. */
return 0;
- case ICMP_FRAG_NEEDED:
- /* Soft state for pmtu is maintained by IP core. */
- return 0;
default:
/* All others are translated to HOST_UNREACH.
rfc2003 contains "deep thoughts" about NET_UNREACH,
@@ -369,7 +366,17 @@ static int ipip_err(struct sk_buff *skb, u32 info)
rcu_read_lock();
t = ipip_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr);
- if (t == NULL || t->parms.iph.daddr == 0)
+ if (t == NULL)
+ goto out;
+
+ if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) {
+ ipv4_update_pmtu(skb, dev_net(skb->dev), info,
+ t->dev->ifindex, 0, IPPROTO_IPIP, 0);
+ err = 0;
+ goto out;
+ }
+
+ if (t->parms.iph.daddr == 0)
goto out;
err = 0;