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net: ipv6: tcp reset, icmp need to consider L3 domain

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Responses for packets to unused ports are getting lost with L3 domains.

IPv4 has ip_send_unicast_reply for sending TCP responses which accounts
for L3 domains; update the IPv6 counterpart tcp_v6_send_response.
For icmp the L3 master check needs to be moved up in icmp6_send
to properly respond to UDP packets to a port with no listener.

Fixes: ca254490c8 ("net: Add VRF support to IPv6 stack")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2016-05-04 21:26:08 -07:00
committed by David S. Miller
parent 856ce5d083
commit 1d2f7b2d95
2 changed files with 8 additions and 4 deletions
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5
net/ipv6/icmp.c
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@@ -445,6 +445,8 @@ 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;
else
iif = l3mdev_master_ifindex(skb->dev);
/*
* Must not send error if the source does not uniquely
@@ -499,9 +501,6 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
else if (!fl6.flowi6_oif)
fl6.flowi6_oif = np->ucast_oif;
if (!fl6.flowi6_oif)
fl6.flowi6_oif = l3mdev_master_ifindex(skb->dev);
dst = icmpv6_route_lookup(net, skb, sk, &fl6);
if (IS_ERR(dst))
goto out;