tree 76c455522d37fa0fa88c7466bb494523cb320fab
parent c1c00ab8626298ac784ea344bf10e94b5bd9bcb5
author Jan Engelhardt <jengelh@medozas.de> 1249370908 +0000
committer David S. Miller <davem@davemloft.net> 1249502576 -0700

net: implement a SO_PROTOCOL getsockoption

Similar to SO_TYPE returning the socket type, SO_PROTOCOL allows to
retrieve the protocol used with a given socket.

I am not quite sure why we have that-many copies of socket.h, and why
the values are not the same on all arches either, but for where hex
numbers dominate, I use 0x1029 for SO_PROTOCOL as that seems to be
the next free unused number across a bunch of operating systems, or
so Google results make me want to believe. SO_PROTOCOL for others
just uses the next free Linux number, 38.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: David S. Miller <davem@davemloft.net>