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(parent: 6fd40d3) | patch
ip: fix tos reflection in ack and reset packets
authorWei Wang <weiwan@google.com>
Tue, 8 Sep 2020 21:09:34 +0000 (14:09 -0700)
committerDavid S. Miller <davem@davemloft.net>
Wed, 9 Sep 2020 03:19:08 +0000 (20:19 -0700)
commitba9e04a7ddf4f22a10e05bf9403db6b97743c7bf
tree0e7f207c221c9dbd0e97050cffc3238f89905122tree | snapshot
parent6fd40d32ef545628225a00c861908a20bfc510a5commit | diff
ip: fix tos reflection in ack and reset packets

Currently, in tcp_v4_reqsk_send_ack() and tcp_v4_send_reset(), we
echo the TOS value of the received packets in the response.
However, we do not want to echo the lower 2 ECN bits in accordance
with RFC 3168 6.1.5 robustness principles.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")

Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/ip_output.c diff | blob | history
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