diff options
Diffstat (limited to 'net/ipv4/ipip.c')
| -rw-r--r-- | net/ipv4/ipip.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 2d0f99bf61b..99af1f0cc65 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, @@ -363,13 +360,32 @@ static int ipip_err(struct sk_buff *skb, u32 info) if (code != ICMP_EXC_TTL) return 0; break; + case ICMP_REDIRECT: + break; } err = -ENOENT; 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 (type == ICMP_REDIRECT) { + ipv4_redirect(skb, dev_net(skb->dev), t->dev->ifindex, 0, + IPPROTO_IPIP, 0); + err = 0; + goto out; + } + + if (t->parms.iph.daddr == 0) goto out; err = 0; @@ -471,7 +487,7 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) dev->stats.tx_fifo_errors++; goto tx_error; } - dst = rt->rt_gateway; + dst = rt_nexthop(rt, old_iph->daddr); } rt = ip_route_output_ports(dev_net(dev), &fl4, NULL, @@ -503,7 +519,7 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) } if (skb_dst(skb)) - skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu); + skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu); if ((old_iph->frag_off & htons(IP_DF)) && mtu < ntohs(old_iph->tot_len)) { |