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-rw-r--r--usr.sbin/routed/output.c172
1 files changed, 172 insertions, 0 deletions
diff --git a/usr.sbin/routed/output.c b/usr.sbin/routed/output.c
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index 0000000000000..10c81b1a0ca0e
--- /dev/null
+++ b/usr.sbin/routed/output.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright (c) 1983, 1988 Regents of the University of California.
+ * 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.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)output.c 5.15 (Berkeley) 2/28/91";
+#endif /* not lint */
+
+/*
+ * Routing Table Management Daemon
+ */
+#include "defs.h"
+
+/*
+ * Apply the function "f" to all non-passive
+ * interfaces. If the interface supports the
+ * use of broadcasting use it, otherwise address
+ * the output to the known router.
+ */
+toall(f, rtstate, skipif)
+ int (*f)();
+ int rtstate;
+ struct interface *skipif;
+{
+ register struct interface *ifp;
+ register struct sockaddr *dst;
+ register int flags;
+ extern struct interface *ifnet;
+
+ for (ifp = ifnet; ifp; ifp = ifp->int_next) {
+ if (ifp->int_flags & IFF_PASSIVE || ifp == skipif)
+ continue;
+ dst = ifp->int_flags & IFF_BROADCAST ? &ifp->int_broadaddr :
+ ifp->int_flags & IFF_POINTOPOINT ? &ifp->int_dstaddr :
+ &ifp->int_addr;
+ flags = ifp->int_flags & IFF_INTERFACE ? MSG_DONTROUTE : 0;
+ (*f)(dst, flags, ifp, rtstate);
+ }
+}
+
+/*
+ * Output a preformed packet.
+ */
+/*ARGSUSED*/
+sndmsg(dst, flags, ifp, rtstate)
+ struct sockaddr *dst;
+ int flags;
+ struct interface *ifp;
+ int rtstate;
+{
+
+ (*afswitch[dst->sa_family].af_output)(s, flags,
+ dst, sizeof (struct rip));
+ TRACE_OUTPUT(ifp, dst, sizeof (struct rip));
+}
+
+/*
+ * Supply dst with the contents of the routing tables.
+ * If this won't fit in one packet, chop it up into several.
+ */
+supply(dst, flags, ifp, rtstate)
+ struct sockaddr *dst;
+ int flags;
+ register struct interface *ifp;
+ int rtstate;
+{
+ register struct rt_entry *rt;
+ register struct netinfo *n = msg->rip_nets;
+ register struct rthash *rh;
+ struct rthash *base = hosthash;
+ int doinghost = 1, size;
+ int (*output)() = afswitch[dst->sa_family].af_output;
+ int (*sendroute)() = afswitch[dst->sa_family].af_sendroute;
+ int npackets = 0;
+
+ msg->rip_cmd = RIPCMD_RESPONSE;
+ msg->rip_vers = RIPVERSION;
+ bzero(msg->rip_res1, sizeof(msg->rip_res1));
+again:
+ for (rh = base; rh < &base[ROUTEHASHSIZ]; rh++)
+ for (rt = rh->rt_forw; rt != (struct rt_entry *)rh; rt = rt->rt_forw) {
+ /*
+ * Don't resend the information on the network
+ * from which it was received (unless sending
+ * in response to a query).
+ */
+ if (ifp && rt->rt_ifp == ifp &&
+ (rt->rt_state & RTS_INTERFACE) == 0)
+ continue;
+ if (rt->rt_state & RTS_EXTERNAL)
+ continue;
+ /*
+ * For dynamic updates, limit update to routes
+ * with the specified state.
+ */
+ if (rtstate && (rt->rt_state & rtstate) == 0)
+ continue;
+ /*
+ * Limit the spread of subnet information
+ * to those who are interested.
+ */
+ if (doinghost == 0 && rt->rt_state & RTS_SUBNET) {
+ if (rt->rt_dst.sa_family != dst->sa_family)
+ continue;
+ if ((*sendroute)(rt, dst) == 0)
+ continue;
+ }
+ size = (char *)n - packet;
+ if (size > MAXPACKETSIZE - sizeof (struct netinfo)) {
+ TRACE_OUTPUT(ifp, dst, size);
+ (*output)(s, flags, dst, size);
+ /*
+ * If only sending to ourselves,
+ * one packet is enough to monitor interface.
+ */
+ if (ifp && (ifp->int_flags &
+ (IFF_BROADCAST | IFF_POINTOPOINT | IFF_REMOTE)) == 0)
+ return;
+ n = msg->rip_nets;
+ npackets++;
+ }
+ n->rip_dst = rt->rt_dst;
+#if BSD < 198810
+ if (sizeof(n->rip_dst.sa_family) > 1) /* XXX */
+ n->rip_dst.sa_family = htons(n->rip_dst.sa_family);
+#else
+#define osa(x) ((struct osockaddr *)(&(x)))
+ osa(n->rip_dst)->sa_family = htons(n->rip_dst.sa_family);
+#endif
+ n->rip_metric = htonl(rt->rt_metric);
+ n++;
+ }
+ if (doinghost) {
+ doinghost = 0;
+ base = nethash;
+ goto again;
+ }
+ if (n != msg->rip_nets || (npackets == 0 && rtstate == 0)) {
+ size = (char *)n - packet;
+ TRACE_OUTPUT(ifp, dst, size);
+ (*output)(s, flags, dst, size);
+ }
+}