diff options
Diffstat (limited to 'net/ipv6/icmp.c')
| -rw-r--r-- | net/ipv6/icmp.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index 8d7b113958b1..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 */ @@ -459,9 +477,9 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info, * Source addr check */ - if (__ipv6_addr_needs_scope_id(addr_type)) - iif = skb->dev->ifindex; - else { + if (__ipv6_addr_needs_scope_id(addr_type)) { + iif = icmp6_iif(skb); + } else { dst = skb_dst(skb); iif = l3mdev_master_ifindex(dst ? dst->dev : skb->dev); } @@ -508,6 +526,7 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info, fl6.fl6_icmp_type = type; fl6.fl6_icmp_code = code; fl6.flowi6_uid = sock_net_uid(net, NULL); + fl6.mp_hash = rt6_multipath_hash(&fl6, skb); security_skb_classify_flow(skb, flowi6_to_flowi(&fl6)); sk = icmpv6_xmit_lock(net); @@ -682,7 +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); |