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| author | Shmulik Ladkani <shmulik@metanetworks.com> | 2018-08-06 15:00:59 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-08-07 22:36:46 +0300 |
| commit | 3789cabaab1a939eb56edd76bbde2c2e49f081da (patch) | |
| tree | 2cdd7954b9a01ac6b58f8f0e3e132b86be9fd469 /net/ipv6/ip6_tunnel.c | |
| parent | 9ca6163005e6abdf2a39eb581abc6060f677a2d7 (diff) | |
| download | linux-3789cabaab1a939eb56edd76bbde2c2e49f081da.tar.xz | |
ip6_tunnel: collect_md xmit: Use ip_tunnel_key's provided src address
When using an ip6tnl device in collect_md mode, the xmit methods ignore
the ipv6.src field present in skb_tunnel_info's key, both for route
calculation purposes (flowi6 construction) and for assigning the
packet's final ipv6h->saddr.
This makes it impossible specifying a desired ipv6 local address in the
encapsulating header (for example, when using tc action tunnel_key).
This is also not aligned with behavior of ipip (ipv4) in collect_md
mode, where the key->u.ipv4.src gets used.
Fix, by assigning fl6.saddr with given key->u.ipv6.src.
In case ipv6.src is not specified, ip6_tnl_xmit uses existing saddr
selection code.
Fixes: 8d79266bc48c ("ip6_tunnel: add collect_md mode to IPv6 tunnels")
Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Reviewed-by: Eyal Birger <eyal.birger@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_tunnel.c')
| -rw-r--r-- | net/ipv6/ip6_tunnel.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 00e138a44cbb..820cebe0c687 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1113,7 +1113,7 @@ route_lookup: dst = NULL; goto tx_err_link_failure; } - if (t->parms.collect_md && + if (t->parms.collect_md && ipv6_addr_any(&fl6->saddr) && ipv6_dev_get_saddr(net, ip6_dst_idev(dst)->dev, &fl6->daddr, 0, &fl6->saddr)) goto tx_err_link_failure; @@ -1255,6 +1255,7 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) key = &tun_info->key; memset(&fl6, 0, sizeof(fl6)); fl6.flowi6_proto = IPPROTO_IPIP; + fl6.saddr = key->u.ipv6.src; fl6.daddr = key->u.ipv6.dst; fl6.flowlabel = key->label; dsfield = key->tos; @@ -1326,6 +1327,7 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) key = &tun_info->key; memset(&fl6, 0, sizeof(fl6)); fl6.flowi6_proto = IPPROTO_IPV6; + fl6.saddr = key->u.ipv6.src; fl6.daddr = key->u.ipv6.dst; fl6.flowlabel = key->label; dsfield = key->tos; |