diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/icmp.c | 33 |
1 files changed, 20 insertions, 13 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index dd7608cf1d72..5acb54405b10 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -399,6 +399,24 @@ relookup_failed: return ERR_PTR(err); } +static int icmp6_iif(const struct sk_buff *skb) +{ + int iif = skb->dev->ifindex; + + /* for local traffic to local address, skb dev is the loopback + * device. Check if there is a dst attached to the skb and if so + * get the real device index. + */ + if (unlikely(iif == LOOPBACK_IFINDEX)) { + const struct rt6_info *rt6 = skb_rt6_info(skb); + + if (rt6) + iif = rt6->rt6i_idev->dev->ifindex; + } + + return iif; +} + /* * Send an ICMP message in response to a packet in error */ @@ -460,18 +478,7 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info, */ if (__ipv6_addr_needs_scope_id(addr_type)) { - iif = skb->dev->ifindex; - - /* for local packets, get the real device index */ - if (iif == LOOPBACK_IFINDEX) { - dst = skb_dst(skb); - if (dst) { - struct rt6_info *rt; - - rt = container_of(dst, struct rt6_info, dst); - iif = rt->rt6i_idev->dev->ifindex; - } - } + iif = icmp6_iif(skb); } else { dst = skb_dst(skb); iif = l3mdev_master_ifindex(dst ? dst->dev : skb->dev); @@ -694,7 +701,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb) fl6.daddr = ipv6_hdr(skb)->saddr; if (saddr) fl6.saddr = *saddr; - fl6.flowi6_oif = skb->dev->ifindex; + fl6.flowi6_oif = icmp6_iif(skb); fl6.fl6_icmp_type = ICMPV6_ECHO_REPLY; fl6.flowi6_mark = mark; fl6.flowi6_uid = sock_net_uid(net, NULL); |