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| author |   Jiri Benc <jbenc@redhat.com> | 2012-02-09 09:35:49 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2012-02-13 00:46:41 -0500 |
| commit | 4c507d2897bd9be810b3403ade73b04cf6fdfd4a (patch) | |
| tree | dfd808407a0f800195e994bb2cfc401fae23295e /net/ethernet | |
| parent | ipv6: helper function to get tclass (diff) | |
| download | linux-dev-4c507d2897bd9be810b3403ade73b04cf6fdfd4a.tar.xz linux-dev-4c507d2897bd9be810b3403ade73b04cf6fdfd4a.zip | |
net: implement IP_RECVTOS for IP_PKTOPTIONS
Currently, it is not easily possible to get TOS/DSCP value of packets from
an incoming TCP stream. The mechanism is there, IP_PKTOPTIONS getsockopt
with IP_RECVTOS set, the same way as incoming TTL can be queried. This is
not actually implemented for TOS, though.
This patch adds this functionality, both for IPv4 (IP_PKTOPTIONS) and IPv6
(IPV6_2292PKTOPTIONS). For IPv4, like in the IP_RECVTTL case, the value of
the TOS field is stored from the other party's ACK.
This is needed for proxies which require DSCP transparency. One such example
is at http://zph.bratcheda.org/.
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ethernet')
0 files changed, 0 insertions, 0 deletions