Add support for using IPsec in multiple rdomains.

This allows to run isakmpd/iked/ipsecctl in multiple rdomains
independently (with "route exec"); the kernel will pickup the rdomain
from the process context of the pfkey socket and load the flows and
SAs into the matching rdomain encap routing table.  The network stack
also needs to pass the rdomain to the ipsec stack to lookup the
correct rdomain that belongs to an interface/mbuf/... You can now run
individual IPsec configs per rdomain or create IPsec VPNs between
multiple rdomains on the same machine ;).  Note that a primary enc(4)
in addition to enc0 interface is required per rdomain, eg. enc1 rdomain 1.

Test by some people, mostly on existing "rdomain 0" setups.  Was in
snaps for some days and people didn't complain.

ok claudio@ naddy@

1 files changed, 3 insertions, 2 deletions

diff --git a/sys/netinet/tcp_output.c b/sys/netinet/tcp_output.c
index cb9964e9e32..58de7ef9557 100644
--- a/sys/netinet/tcp_output.c
+++ b/sys/netinet/tcp_output.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: tcp_output.c,v 1.89 2010/07/03 04:44:51 guenther Exp $	*/
+/*	$OpenBSD: tcp_output.c,v 1.90 2010/07/09 16:58:06 reyk Exp $	*/
 /*	$NetBSD: tcp_output.c,v 1.16 1997/06/03 16:17:09 kml Exp $	*/
 
 /*
@@ -924,7 +924,8 @@ send:
 
 		/* XXX gettdbbysrcdst() should really be called at spltdb(). */
 		/* XXX this is splsoftnet(), currently they are the same. */
-		tdb = gettdbbysrcdst(0, &src, &dst, IPPROTO_TCP);
+		tdb = gettdbbysrcdst(rtable_l2(tp->t_inpcb->inp_rtableid),
+		    0, &src, &dst, IPPROTO_TCP);
 		if (tdb == NULL)
 			return (EPERM);