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ipv6: icmp: allow flowlabel reflection in echo replies

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Extend flowlabel_reflect bitmask to allow conditional
reflection of incoming flowlabels in echo replies.

Note this has precedence against auto flowlabels.

Add flowlabel_reflect enum to replace hard coded
values.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2019-07-01 06:39:36 -07:00
committed by David S. Miller
parent 954a5a0294
commit a346abe051
6 changed files with 17 additions and 5 deletions
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4
Documentation/networking/ip-sysctl.txt
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@@ -1452,7 +1452,7 @@ flowlabel_reflect - INTEGER
environments. See RFC 7690 and:
https://tools.ietf.org/html/draft-wang-6man-flow-label-reflection-01
This is a mask of two bits.
This is a bitmask.
1: enabled for established flows
Note that this prevents automatic flowlabel changes, as done
@@ -1463,6 +1463,8 @@ flowlabel_reflect - INTEGER
If set, a RST packet sent in response to a SYN packet on a closed
port will reflect the incoming flow label.
4: enabled for ICMPv6 echo reply messages.
Default: 0
fib_multipath_hash_policy - INTEGER