netlink: Add nl_foreach_oftype to filter response message types

In most cases where processing response messages, we expect only one type
of message (excepting NLMSG_DONE or NLMSG_ERROR), and so we need a test
and continue to skip anything else.  Add a helper macro to do this.
This also fixes a bug in nl_get_ext_if() where we didn't have such a test
and if we got a message other than RTM_NEWROUTE we would have parsed
its contents as nonsense.

Also add a warning message if we get such an unexpected message type, which
could be useful for debugging if we ever hit it.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

0 files changed, 0 insertions, 0 deletions