Reviewed by: julian and Mike Mitchel

Submitted by:	john Hay (John.Hay@csir.co.za)

John's IPXrouted..
this has not yet been seen to run correctly with Mike's IPX/SPX
code  (he has his own)
bringing them both in is the first step in merging the two packages
for 2.2

1 files changed, 151 insertions, 0 deletions

diff --git a/usr.sbin/IPXrouted/if.c b/usr.sbin/IPXrouted/if.c
new file mode 100644
index 0000000..3ea0d51
--- /dev/null
+++ b/usr.sbin/IPXrouted/if.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Copyright (c) 1995 John Hay.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * static char sccsid[] = "@(#)if.c	5.1 (Berkeley) 6/4/85"; (routed/if.c)
+ *
+ *	$Id: if.c,v 1.2 1995/10/11 18:57:14 jhay Exp $
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)if.c	8.1 (Berkeley) 6/5/93";
+#endif /* not lint */
+
+/*
+ * Routing Table Management Daemon
+ */
+#include "defs.h"
+
+extern	struct interface *ifnet;
+
+/*
+ * Find the interface with address addr.
+ */
+struct interface *
+if_ifwithaddr(addr)
+	struct sockaddr *addr;
+{
+	register struct interface *ifp;
+
+#define	same(a1, a2) \
+	(bcmp((caddr_t)((a1)->sa_data), (caddr_t)((a2)->sa_data), 14) == 0)
+	for (ifp = ifnet; ifp; ifp = ifp->int_next) {
+		if (ifp->int_flags & IFF_REMOTE)
+			continue;
+		if (ifp->int_addr.sa_family != addr->sa_family)
+			continue;
+		if (same(&ifp->int_addr, addr))
+			break;
+		if ((ifp->int_flags & IFF_BROADCAST) &&
+		    same(&ifp->int_broadaddr, addr))
+			break;
+	}
+	return (ifp);
+}
+
+/*
+ * Find the point-to-point interface with destination address addr.
+ */
+struct interface *
+if_ifwithdstaddr(addr)
+	struct sockaddr *addr;
+{
+	register struct interface *ifp;
+
+	for (ifp = ifnet; ifp; ifp = ifp->int_next) {
+		if ((ifp->int_flags & IFF_POINTOPOINT) == 0)
+			continue;
+		if (same(&ifp->int_dstaddr, addr))
+			break;
+	}
+	return (ifp);
+}
+
+/*
+ * Find the interface on the network 
+ * of the specified address.
+ */
+struct interface *
+if_ifwithnet(addr)
+	register struct sockaddr *addr;
+{
+	register struct interface *ifp;
+	register int af = addr->sa_family;
+	register int (*netmatch)();
+
+	if (af >= AF_MAX)
+		return (0);
+	netmatch = afswitch[af].af_netmatch;
+	for (ifp = ifnet; ifp; ifp = ifp->int_next) {
+		if (ifp->int_flags & IFF_REMOTE)
+			continue;
+		if (af != ifp->int_addr.sa_family)
+			continue;
+		if ((*netmatch)(addr, &ifp->int_addr))
+			break;
+	}
+	return (ifp);
+}
+
+/*
+ * Find an interface from which the specified address
+ * should have come from.  Used for figuring out which
+ * interface a packet came in on -- for tracing.
+ */
+struct interface *
+if_iflookup(addr)
+	struct sockaddr *addr;
+{
+	register struct interface *ifp, *maybe;
+	register int af = addr->sa_family;
+	register int (*netmatch)();
+
+	if (af >= AF_MAX)
+		return (0);
+	maybe = 0;
+	netmatch = afswitch[af].af_netmatch;
+	for (ifp = ifnet; ifp; ifp = ifp->int_next) {
+		if (ifp->int_addr.sa_family != af)
+			continue;
+		if (same(&ifp->int_addr, addr))
+			break;
+		if ((ifp->int_flags & IFF_BROADCAST) &&
+		    same(&ifp->int_broadaddr, addr))
+			break;
+		if (maybe == 0 && (*netmatch)(addr, &ifp->int_addr))
+			maybe = ifp;
+	}
+	if (ifp == 0)
+		ifp = maybe;
+	return (ifp);
+}