Guillaume Nault 8230680f36 ipv6: Fix tcp socket connection with DSCP.
Take into account the IPV6_TCLASS socket option (DSCP) in
tcp_v6_connect(). Otherwise fib6_rule_match() can't properly
match the DSCP value, resulting in invalid route lookup.

For example:

  ip route add unreachable table main 2001:db8::10/124

  ip route add table 100 2001:db8::10/124 dev eth0
  ip -6 rule add dsfield 0x04 table 100

  echo test | socat - TCP6:[2001:db8::11]:54321,ipv6-tclass=0x04

Without this patch, socat fails at connect() time ("No route to host")
because the fib-rule doesn't jump to table 100 and the lookup ends up
being done in the main table.

Fixes: 2cc67cc731d9 ("[IPV6] ROUTE: Routing by Traffic Class.")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-02-09 22:49:04 -08:00
..
2023-01-12 17:02:20 -06:00
2022-12-13 15:47:48 -08:00
2022-12-17 14:06:53 -06:00
2023-02-08 09:07:11 +00:00
2023-02-08 09:07:11 +00:00
2022-12-13 15:47:48 -08:00
2023-01-10 15:03:06 -06:00
2022-12-13 15:47:48 -08:00
2022-12-16 03:54:54 -08:00
2022-08-22 14:26:30 +01:00
2022-08-22 14:26:30 +01:00
2022-12-13 15:47:48 -08:00