forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

net: implement IP_RECVTOS for IP_PKTOPTIONS

Browse source 
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>
This commit is contained in:
Jiri Benc 2012-02-09 09:35:49 +00:00 • committed by David S. Miller
parent 7a3198a897
commit 4c507d2897
8 changed files with 17 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/linux/ipv6.h
View file

@ -366,7 +366,7 @@ struct ipv6_pinfo {
dontfrag:1;
__u8 min_hopcount;
__u8 tclass;
__u8 padding;
__u8 rcv_tclass;
__u32 dst_cookie;