Replace aux mbufs with packet tags:

o instead of a list of mbufs use a list of m_tag structures a la openbsd
o for netgraph et. al. extend the stock openbsd m_tag to include a 32-bit
  ABI/module number cookie
o for openbsd compatibility define a well-known cookie MTAG_ABI_COMPAT and
  use this in defining openbsd-compatible m_tag_find and m_tag_get routines
o rewrite KAME use of aux mbufs in terms of packet tags
o eliminate the most heavily used aux mbufs by adding an additional struct
  inpcb parameter to ip_output and ip6_output to allow the IPsec code to
  locate the security policy to apply to outbound packets
o bump __FreeBSD_version so code can be conditionalized
o fixup ipfilter's call to ip_output based on __FreeBSD_version

Reviewed by:	julian, luigi (silent), -arch, -net, darren
Approved by:	julian, silence from everyone else
Obtained from:	openbsd (mostly)
MFC after:	1 month

1 files changed, 3 insertions, 5 deletions

diff --git a/sys/netinet6/ip6_output.c b/sys/netinet6/ip6_output.c
index bb3e079..63d676d 100644
--- a/sys/netinet6/ip6_output.c
+++ b/sys/netinet6/ip6_output.c
@@ -143,13 +143,14 @@ static int ip6_splithdr __P((struct mbuf *, struct ip6_exthdrs *));
  * which is rt_rmx.rmx_mtu.
  */
 int
-ip6_output(m0, opt, ro, flags, im6o, ifpp)
+ip6_output(m0, opt, ro, flags, im6o, ifpp, inp)
 	struct mbuf *m0;
 	struct ip6_pktopts *opt;
 	struct route_in6 *ro;
 	int flags;
 	struct ip6_moptions *im6o;
 	struct ifnet **ifpp;		/* XXX: just for statistics */
+	struct inpcb *inp;
 {
 	struct ip6_hdr *ip6, *mhip6;
 	struct ifnet *ifp, *origifp;
@@ -173,12 +174,9 @@ ip6_output(m0, opt, ro, flags, im6o, ifpp)
 #endif /* PFIL_HOOKS */
 #ifdef IPSEC
 	int needipsectun = 0;
-	struct socket *so;
 	struct secpolicy *sp = NULL;
+	struct socket *so = inp ? inp->inp_socket : NULL;
 
-	/* for AH processing. stupid to have "socket" variable in IP layer... */
-	so = ipsec_getsocket(m);
-	(void)ipsec_setsocket(m, NULL);
 	ip6 = mtod(m, struct ip6_hdr *);
 #endif /* IPSEC */