linux-stable/include/uapi
Maciej Żenczykowski 84e14fe353 net-ipv6: add support for sockopt(SOL_IPV6, IPV6_FREEBIND)
So far we've been relying on sockopt(SOL_IP, IP_FREEBIND) being usable
even on IPv6 sockets.

However, it turns out it is perfectly reasonable to want to set freebind
on an AF_INET6 SOCK_RAW socket - but there is no way to set any SOL_IP
socket option on such a socket (they're all blindly errored out).

One use case for this is to allow spoofing src ip on a raw socket
via sendmsg cmsg.

Tested:
  built, and booted
  # python
  >>> import socket
  >>> SOL_IP = socket.SOL_IP
  >>> SOL_IPV6 = socket.IPPROTO_IPV6
  >>> IP_FREEBIND = 15
  >>> IPV6_FREEBIND = 78
  >>> s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM, 0)
  >>> s.getsockopt(SOL_IP, IP_FREEBIND)
  0
  >>> s.getsockopt(SOL_IPV6, IPV6_FREEBIND)
  0
  >>> s.setsockopt(SOL_IPV6, IPV6_FREEBIND, 1)
  >>> s.getsockopt(SOL_IP, IP_FREEBIND)
  1
  >>> s.getsockopt(SOL_IPV6, IPV6_FREEBIND)
  1

Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-09-30 05:30:52 +01:00
..
asm-generic Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
drm Merge branch 'drm-vmwgfx-next' of git://people.freedesktop.org/~syeh/repos_linux into drm-next 2017-08-29 10:38:14 +10:00
linux net-ipv6: add support for sockopt(SOL_IPV6, IPV6_FREEBIND) 2017-09-30 05:30:52 +01:00
misc uapi: export all headers under uapi directories 2017-05-11 00:21:54 +09:00
mtd uapi: export all headers under uapi directories 2017-05-11 00:21:54 +09:00
rdma IB/core: Add completion queue (cq) object actions 2017-08-31 08:35:13 -04:00
scsi scsi: cxlflash: Support AFU debug 2017-06-26 15:01:12 -04:00
sound Merge remote-tracking branch 'asoc/topic/intel' into asoc-next 2017-09-01 12:12:19 +01:00
video uapi: export all headers under uapi directories 2017-05-11 00:21:54 +09:00
xen uapi: export all headers under uapi directories 2017-05-11 00:21:54 +09:00