Subject: [PATCH net-next v3 0/2] ipv4: per-datagram IP_TOS and IP_TTL via sendmsg()

From: Francesco Fusco <[email-masked]>
Date: Tue, 24 Sep 2013 15:43:07 +0200

There is no way to set the IP_TOS field on a per-packet basis in IPv4, while
IPv6 has such a mechanism. Therefore one has to fall back to the setsockopt()
in case of IPv4. 

Using the existing per-socket option is not convenient particularly in the
situations where multiple threads have to use the same socket data requiring
per-thread TOS values. In fact this would involve calling setsockopt() before
sendmsg() every time.

Francesco Fusco (2):
  ipv4: IP_TOS and IP_TTL can be specified as ancillary data
  ipv4: processing ancillary IP_TOS or IP_TTL

 include/net/inet_sock.h |  3 +++
 include/net/ip.h        | 14 ++++++++++++++
 include/net/route.h     |  1 +
 net/ipv4/icmp.c         |  5 +++++
 net/ipv4/ip_output.c    | 13 ++++++++++---
 net/ipv4/ip_sockglue.c  | 20 +++++++++++++++++++-
 net/ipv4/ping.c         |  4 +++-
 net/ipv4/raw.c          |  4 +++-
 net/ipv4/udp.c          |  4 +++-
 9 files changed, 61 insertions(+), 7 deletions(-)

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1.8.3.1