BSD 4_3_Net_2 release

[unix-history] / usr / src / sbin / XNSrouted / output.c

diff --git a/usr/src/sbin/XNSrouted/output.c b/usr/src/sbin/XNSrouted/output.c
index ebb67b0..cdea11f 100644 (file)
--- a/usr/src/sbin/XNSrouted/output.c
+++ b/usr/src/sbin/XNSrouted/output.c
@@ -1,6 +1,42 @@
+/*
+ * Copyright (c) 1985 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This file includes significant work done at Cornell University by
+ * Bill Nesheim.  That work included by permission.
+ *
+ * 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.
+ */
+

 #ifndef lint
 #ifndef lint

-static char sccsid[] = "@(#)output.c   4.5 (Berkeley) 4/9/84";
-#endif
+static char sccsid[] = "@(#)output.c   5.8 (Berkeley) 2/26/91";
+#endif /* not lint */

 
 /*
  * Routing Table Management Daemon
 
 /*
  * Routing Table Management Daemon


@@ -36,7 +72,7 @@ toall(f)
  * Output a preformed packet.
  */
 /*ARGSUSED*/
  * Output a preformed packet.
  */
 /*ARGSUSED*/

-sendmsg(dst, flags, ifp)
+sndmsg(dst, flags, ifp)

        struct sockaddr *dst;
        int flags;
        struct interface *ifp;
        struct sockaddr *dst;
        int flags;
        struct interface *ifp;


@@ -57,12 +93,14 @@ supply(dst, flags, ifp)
        struct interface *ifp;
 {
        register struct rt_entry *rt;
        struct interface *ifp;
 {
        register struct rt_entry *rt;

-       struct netinfo *n = msg->rip_nets;

        register struct rthash *rh;
        register struct rthash *rh;

+       register struct netinfo *nn;
+       register struct netinfo *n = msg->rip_nets;

        struct rthash *base = hosthash;
        struct rthash *base = hosthash;

-       int doinghost = 1, size;

        struct sockaddr_ns *sns =  (struct sockaddr_ns *) dst;
        int (*output)() = afswitch[dst->sa_family].af_output;
        struct sockaddr_ns *sns =  (struct sockaddr_ns *) dst;
        int (*output)() = afswitch[dst->sa_family].af_output;

+       int doinghost = 1, size, metric;
+       union ns_net net;

 
        msg->rip_cmd = ntohs(RIPCMD_RESPONSE);
 again:
 
        msg->rip_cmd = ntohs(RIPCMD_RESPONSE);
 again:


@@ -75,9 +113,26 @@ again:
                        n = msg->rip_nets;
                }
                sns = (struct sockaddr_ns *)&rt->rt_dst;
                        n = msg->rip_nets;
                }
                sns = (struct sockaddr_ns *)&rt->rt_dst;

-               xnnet(n->rip_dst[0]) = ns_netof(sns->sns_addr);
-               n->rip_metric = htons(min(rt->rt_metric + 1, HOPCNT_INFINITY));
+               if ((rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST)
+                       sns = (struct sockaddr_ns *)&rt->rt_router;
+               metric = min(rt->rt_metric + 1, HOPCNT_INFINITY);
+               net = sns->sns_addr.x_net;
+               /*
+                * Make sure that we don't put out a two net entries
+                * for a pt to pt link (one for the G route, one for the if)
+                * This is a kludge, and won't work if there are lots of nets.
+                */
+               for (nn = msg->rip_nets; nn < n; nn++) {
+                       if (ns_neteqnn(net, nn->rip_dst)) {
+                               if (metric < ntohs(nn->rip_metric))
+                                       nn->rip_metric = htons(metric);
+                               goto next;
+                       }
+               }
+               n->rip_dst = net;
+               n->rip_metric = htons(metric);

                n++;
                n++;

+       next:;

        }
        if (doinghost) {
                doinghost = 0;
        }
        if (doinghost) {
                doinghost = 0;