* implement 2292bis IPV6_REACHCONF (trivial).

CHANGELOG

@@ -1,8 +1,11 @@
 			CHANGELOG for KAME kit
 
-$Id: CHANGELOG,v 1.369 1999/12/23 06:17:07 jinmei Exp $
+$Id: CHANGELOG,v 1.370 1999/12/23 17:19:44 itojun Exp $
 
 <199912>
+Fri Dec 24 02:21:30 JST 1999  itojun@iijlab.net
+	* implement 2292bis IPV6_REACHCONF (trivial).
+
 1999-12-23  JINMEI, Tatuya  <jinmei@isl.rdc.toshiba.co.jp>
 	* kame/sys/netinet6/nd6.c (nd6_free): call pfctlinput with
 	PRC_HOSTDEAD in order to remove all cached routes to the

TODO.2292bis

@@ -1,6 +1,6 @@
 TODO list for the new advanced API (aka rfc2292bis)
 KAME project
-$Id: TODO.2292bis,v 1.4 1999/12/22 16:49:04 jinmei Exp $
+$Id: TODO.2292bis,v 1.5 1999/12/23 17:19:46 itojun Exp $
 
 new socket options or ancillary data types:
 - IPV6_RTHDRDSTOPTS	done/19991221	jinmei	*
@@ -12,7 +12,7 @@ new socket options or ancillary data types:
 - IPV6_RECVRTHDRDSTOPTS	done/19991217	jinmei
 - IPV6_USE_MIN_MTU
 - IPV6_RECVPATHMTU
-- IPV6_REACHCONF
+- IPV6_REACHCONF	done/19991223	itojun
 (*) the current implementation returns each dst opt header in a single
     ancillary object, but the specfication requires that all headers is
     stored in a single object.

kame/sys/netinet6/ip6_output.c

@@ -762,6 +762,12 @@ skip_ipsec2:;
 	if (ifpp)
 		*ifpp = ifp;
 
+	/*
+	 * Upper-layer reachability confirmation
+	 */
+	if (opt && (opt->ip6po_flags & IP6PO_REACHCONF))
+		nd6_nud_hint(ro->ro_rt, NULL);
+
 	/*
 	 * Determine path MTU.
 	 */
@@ -2463,6 +2469,12 @@ ip6_setpktoptions(control, opt, priv)
 			}
 			break;
 
+		case IPV6_REACHCONF:
+			if (cm->cmsg_len != CMSG_LEN(0))
+				return(EINVAL);
+			opt->ip6po_flags |= IP6PO_REACHCONF;
+			break;
+
 		default:
 			return(ENOPROTOOPT);
 		}

kame/sys/netinet6/ip6_var.h

@@ -134,6 +134,8 @@ struct	ip6_pktopts {
 	struct	ip6_dest *ip6po_dest1; /* Destination options header(1st part) */
 	struct	ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */
 	struct	ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */
+	int ip6po_flags;
+#define IP6PO_REACHCONF	0x01		/* upper-layer reach. confirmation */
 };
 
 struct	ip6stat {