From: Eric Dumazet <eric.duma...@gmail.com> Date: Wed, 07 Sep 2016 21:52:56 -0700
> From: Eric Dumazet <eduma...@google.com> > > In commit f02db315b8d8 ("ipv4: IP_TOS and IP_TTL can be specified as > ancillary data") Francesco added IP_TOS values specified as integer. > > However, kernel sends to userspace (at recvmsg() time) an IP_TOS value > in a single byte, when IP_RECVTOS is set on the socket. > > It can be very useful to reflect all ancillary options as given by the > kernel in a subsequent sendmsg(), instead of aborting the sendmsg() with > EINVAL after Francesco patch. > > So this patch extends IP_TOS ancillary to accept an u8, so that an UDP > server can simply reuse same ancillary block without having to mangle > it. > > Jesper can then augment > https://github.com/netoptimizer/network-testing/blob/master/src/udp_example02.c > to add TOS reflection ;) > > Fixes: f02db315b8d8 ("ipv4: IP_TOS and IP_TTL can be specified as ancillary > data") > Signed-off-by: Eric Dumazet <eduma...@google.com> Applied, thanks Eric.