From: Stephen Hemminger <redacted>
Date: Fri, 21 Dec 2007 09:43:36 -0800

iproute2 source uses headers that result from "make headers_install".
The header files net/tcp_states.h and net/veth.h are both being used
but are not processed. 

Signed-off-by: Stephen Hemminger <redacted>

The convention is to place user visible interfaces in header
files under include/linux/ and purely kernel internal bits
in header files under include/net/

Therefore exporting net/*.h headers is not right.

net/veth.h only defines user visible interfaces, so it
belongs under include/linux and added to include/linux/Kbuild,
and I would happily take a patch implementing that.

net/tcp_states.h is not movable to include/linux/ and thus to
userspace, it defines things that are present already in existing
userland header files.  If you look, <netinet/tcp.h> defines these
state values, as an enumeration.  If you need the TCPF_* flag bit
versions, sorry... you'll need to find some other way to get those
into userspace.