Virgin import of new BSD/SGI routed. This update contains a number

of important bug fixes.

Obtained from:	Vernon J. Schryver <vjs@mica.denver.sgi.com>

1 files changed, 874 insertions, 0 deletions

diff --git a/sbin/routed/output.c b/sbin/routed/output.c
new file mode 100644
index 0000000..eafcf31
--- /dev/null
+++ b/sbin/routed/output.c
@@ -0,0 +1,874 @@
+/*
+ * Copyright (c) 1983, 1988, 1993
+ *	The 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.
+ */
+
+#if !defined(lint) && !defined(sgi) && !defined(__NetBSD__)
+static char sccsid[] = "@(#)output.c	8.1 (Berkeley) 6/5/93";
+#elif defined(__NetBSD__)
+static char rcsid[] = "$NetBSD$";
+#endif
+#ident "$Revision: 1.17 $"
+
+#include "defs.h"
+
+
+int update_seqno;
+
+
+/* walk the tree of routes with this for output
+ */
+struct {
+	struct sockaddr_in to;
+	naddr	to_mask;
+	naddr	to_net;
+	naddr	to_std_mask;
+	naddr	to_std_net;
+	struct interface *ifp;		/* usually output interface */
+	struct ws_buf {			/* info for each buffer */
+	    struct rip	*buf;
+	    struct netinfo *n;
+	    struct netinfo *base;
+	    struct netinfo *lim;
+	    enum output_type type;
+	} v12, v2;
+	char	metric;			/* adjust metrics by interface */
+	int	npackets;
+	int	gen_limit;
+	u_int	state;
+#define	    WS_ST_FLASH	    0x001	/* send only changed routes */
+#define	    WS_ST_RIP2_SAFE 0x002	/* send RIPv2 safe for RIPv1 */
+#define	    WS_ST_RIP2_ALL  0x004	/* send full featured RIPv2 */
+#define	    WS_ST_AG	    0x008	/* ok to aggregate subnets */
+#define	    WS_ST_SUPER_AG  0x010	/* ok to aggregate networks */
+#define	    WS_ST_SUB_AG    0x020	/* aggregate subnets in odd case */
+#define	    WS_ST_QUERY	    0x040	/* responding to a query */
+#define	    WS_ST_TO_ON_NET 0x080	/* sending onto one of our nets */
+#define	    WS_ST_DEFAULT   0x100	/* faking a default */
+#define	    WS_ST_PM_RDISC  0x200	/* poor-man's router discovery */
+} ws;
+
+/* A buffer for what can be heard by both RIPv1 and RIPv2 listeners */
+union pkt_buf ripv12_buf;
+
+/* Another for only RIPv2 listeners */
+union pkt_buf rip_v2_buf;
+
+
+
+/* Send the contents of the global buffer via the non-multicast socket
+ */
+int					/* <0 on failure */
+output(enum output_type type,
+       struct sockaddr_in *dst,		/* send to here */
+       struct interface *ifp,
+       struct rip *buf,
+       int size)			/* this many bytes */
+{
+	struct sockaddr_in sin;
+	int flags;
+	char *msg;
+	int res;
+	naddr tgt_mcast;
+	int soc;
+	int serrno;
+
+	sin = *dst;
+	if (sin.sin_port == 0)
+		sin.sin_port = htons(RIP_PORT);
+#ifdef _HAVE_SIN_LEN
+	if (sin.sin_len == 0)
+		sin.sin_len = sizeof(sin);
+#endif
+
+	soc = rip_sock;
+	flags = 0;
+
+	switch (type) {
+	case OUT_QUERY:
+		msg = "Answer Query";
+		if (soc < 0)
+			soc = ifp->int_rip_sock;
+		break;
+	case OUT_UNICAST:
+		msg = "Send";
+		if (soc < 0)
+			soc = ifp->int_rip_sock;
+		flags = MSG_DONTROUTE;
+		break;
+	case OUT_BROADCAST:
+		if (ifp->int_if_flags & IFF_POINTOPOINT) {
+			msg = "Send";
+		} else {
+			msg = "Send bcast";
+		}
+		flags = MSG_DONTROUTE;
+		break;
+	case OUT_MULTICAST:
+		if (ifp->int_if_flags & IFF_POINTOPOINT) {
+			msg = "Send pt-to-pt";
+		} else if (ifp->int_state & IS_DUP) {
+			trace_act("abort multicast output via %s"
+				  " with duplicate address\n",
+				  ifp->int_name);
+			return 0;
+		} else {
+			msg = "Send mcast";
+			if (rip_sock_mcast != ifp) {
+#ifdef MCAST_PPP_BUG
+				/* Do not specifiy the primary interface
+				 * explicitly if we have the multicast
+				 * point-to-point kernel bug, since the
+				 * kernel will do the wrong thing if the
+				 * local address of a point-to-point link
+				 * is the same as the address of an ordinary
+				 * interface.
+				 */
+				if (ifp->int_addr == myaddr) {
+					tgt_mcast = 0;
+				} else
+#endif
+				tgt_mcast = ifp->int_addr;
+				if (0 > setsockopt(rip_sock,
+						   IPPROTO_IP, IP_MULTICAST_IF,
+						   &tgt_mcast,
+						   sizeof(tgt_mcast))) {
+					serrno = errno;
+					LOGERR("setsockopt(rip_sock,"
+					       "IP_MULTICAST_IF)");
+					errno = serrno;
+					ifp = 0;
+					return -1;
+				}
+				rip_sock_mcast = ifp;
+			}
+			sin.sin_addr.s_addr = htonl(INADDR_RIP_GROUP);
+		}
+
+	case NO_OUT_MULTICAST:
+	case NO_OUT_RIPV2:
+		break;
+	}
+
+	trace_rip(msg, "to", &sin, ifp, buf, size);
+
+	res = sendto(soc, buf, size, flags,
+		     (struct sockaddr *)&sin, sizeof(sin));
+	if (res < 0
+	    && (ifp == 0 || !(ifp->int_state & IS_BROKE))) {
+		serrno = errno;
+		msglog("%s sendto(%s%s%s.%d): %s", msg,
+		       ifp != 0 ? ifp->int_name : "",
+		       ifp != 0 ? ", " : "",
+		       inet_ntoa(sin.sin_addr),
+		       ntohs(sin.sin_port),
+		       strerror(errno));
+		errno = serrno;
+	}
+
+	return res;
+}
+
+
+/* install authentication if appropriate
+ */
+static void
+set_auth(struct ws_buf *w)
+{
+	if (ws.ifp != 0
+	    && ws.ifp->int_passwd[0] != '\0'
+	    && (ws.state & WS_ST_RIP2_SAFE)) {
+		w->n->n_family = RIP_AF_AUTH;
+		((struct netauth*)w->n)->a_type = RIP_AUTH_PW;
+		bcopy(ws.ifp->int_passwd, ((struct netauth*)w->n)->au.au_pw,
+		      sizeof(((struct netauth*)w->n)->au.au_pw));
+		w->n++;
+	}
+}
+
+
+/* Send the buffer
+ */
+static void
+supply_write(struct ws_buf *wb)
+{
+	/* Output multicast only if legal.
+	 * If we would multcast and it would be illegal, then discard the
+	 * packet.
+	 */
+	switch (wb->type) {
+	case NO_OUT_MULTICAST:
+		trace_pkt("skip multicast to %s because impossible\n",
+			  naddr_ntoa(ws.to.sin_addr.s_addr));
+		break;
+	case NO_OUT_RIPV2:
+		break;
+	default:
+		if (output(wb->type, &ws.to, ws.ifp, wb->buf,
+			   ((char *)wb->n - (char*)wb->buf)) < 0
+		    && ws.ifp != 0)
+			if_sick(ws.ifp);
+		ws.npackets++;
+		break;
+	}
+
+	bzero(wb->n = wb->base, sizeof(*wb->n)*NETS_LEN);
+	if (wb->buf->rip_vers == RIPv2)
+		set_auth(wb);
+}
+
+
+/* put an entry into the packet
+ */
+static void
+supply_out(struct ag_info *ag)
+{
+	int i;
+	naddr mask, v1_mask, s_mask, dst_h, ddst_h;
+	struct ws_buf *wb;
+
+
+	/* Skip this route if doing a flash update and it and the routes
+	 * it aggregates have not changed recently.
+	 */
+	if (ag->ag_seqno < update_seqno
+	    && (ws.state & WS_ST_FLASH))
+		return;
+
+	/* Skip this route if required by split-horizon.
+	 */
+	if (ag->ag_state & AGS_SPLIT_HZ)
+		return;
+
+	dst_h = ag->ag_dst_h;
+	mask = ag->ag_mask;
+	v1_mask = ripv1_mask_host(htonl(dst_h),
+				  (ws.state & WS_ST_TO_ON_NET) ? ws.ifp : 0);
+	s_mask = std_mask(htonl(dst_h));
+	i = 0;
+
+	/* If we are sending RIPv2 packets that cannot (or must not) be
+	 * heard by RIPv1 listeners, do not worry about sub- or supernets.
+	 * Subnets (from other networks) can only be sent via multicast.
+	 * A pair of subnet routes might have been promoted so that they
+	 * are legal to send by RIPv1.
+	 * If RIPv1 is off, use the multicast buffer, unless this is the
+	 * fake default route and it is acting as a poor-man's router-
+	 * discovery mechanism.
+	 */
+	if (((ws.state & WS_ST_RIP2_ALL)
+	     && (dst_h != RIP_DEFAULT || !(ws.state & WS_ST_PM_RDISC)))
+	    || ((ag->ag_state & AGS_RIPV2) && v1_mask != mask)) {
+		/* use the RIPv2-only buffer */
+		wb = &ws.v2;
+
+	} else {
+		/* use the RIPv1-or-RIPv2 buffer */
+		wb = &ws.v12;
+
+		/* Convert supernet route into corresponding set of network
+		 * routes for RIPv1, but leave non-contiguous netmasks
+		 * to ag_check().
+		 */
+		if (v1_mask > mask
+		    && mask + (mask & -mask) == 0) {
+			ddst_h = v1_mask & -v1_mask;
+			i = (v1_mask & ~mask)/ddst_h;
+
+			if (i > ws.gen_limit) {
+				/* Punt if we would have to generate an
+				 * unreasonable number of routes.
+				 */
+#ifdef DEBUG
+				msglog("sending %s to %s as 1 instead"
+				       " of %d routes",
+				       addrname(htonl(dst_h),mask,1),
+				       naddr_ntoa(ws.to.sin_addr.s_addr),
+				       i+1);
+#endif
+				i = 0;
+
+			} else {
+				mask = v1_mask;
+				ws.gen_limit -= i;
+			}
+		}
+	}
+
+	do {
+		wb->n->n_family = RIP_AF_INET;
+		wb->n->n_dst = htonl(dst_h);
+		/* If the route is from router-discovery or we are
+		 * shutting down, admit only a bad metric.
+		 */
+		wb->n->n_metric = ((stopint || ag->ag_metric < 1)
+				   ? HOPCNT_INFINITY
+				   : ag->ag_metric);
+		HTONL(wb->n->n_metric);
+		if (wb->buf->rip_vers == RIPv2) {
+			if (ag->ag_nhop != 0
+			    && (ws.state & WS_ST_RIP2_SAFE)
+			    && ((ws.state & WS_ST_QUERY)
+				|| (ag->ag_nhop != ws.ifp->int_addr
+				    && on_net(ag->ag_nhop,
+					      ws.ifp->int_net,
+					      ws.ifp->int_mask))))
+				wb->n->n_nhop = ag->ag_nhop;
+			if ((ws.state & WS_ST_RIP2_ALL)
+			    || mask != s_mask)
+				wb->n->n_mask = htonl(mask);
+			wb->n->n_tag = ag->ag_tag;
+		}
+		dst_h += ddst_h;
+
+		if (++wb->n >= wb->lim)
+			supply_write(wb);
+	} while (i-- != 0);
+}
+
+
+/* supply one route from the table
+ */
+/* ARGSUSED */
+static int
+walk_supply(struct radix_node *rn,
+	    struct walkarg *w)
+{
+#define RT ((struct rt_entry *)rn)
+	u_short ags;
+	char metric, pref;
+	naddr dst, nhop;
+
+
+	/* Do not advertise the loopback interface
+	 * or external remote interfaces
+	 */
+	if ((RT->rt_state & RS_IF)
+	    && RT->rt_ifp != 0
+	    && ((RT->rt_ifp->int_if_flags & IFF_LOOPBACK)
+		|| (RT->rt_ifp->int_state & IS_EXTERNAL))
+	    && !(RT->rt_state & RS_MHOME))
+		return 0;
+
+	/* If being quiet about our ability to forward, then
+	 * do not say anything unless responding to a query.
+	 */
+	if (!supplier && !(ws.state & WS_ST_QUERY))
+		return 0;
+
+	dst = RT->rt_dst;
+
+	/* do not collide with the fake default route */
+	if (dst == RIP_DEFAULT
+	    && (ws.state & WS_ST_DEFAULT))
+		return 0;
+
+	if (RT->rt_state & RS_NET_SYN) {
+		if (RT->rt_state & RS_NET_INT) {
+			/* Do not send manual synthetic network routes
+			 * into the subnet.
+			 */
+			if (on_net(ws.to.sin_addr.s_addr,
+				   ntohl(dst), RT->rt_mask))
+				return 0;
+
+		} else {
+			/* Do not send automatic synthetic network routes
+			 * if they are not needed becaus no RIPv1 listeners
+			 * can hear them.
+			 */
+			if (ws.state & WS_ST_RIP2_ALL)
+				return 0;
+
+			/* Do not send automatic synthetic network routes to
+			 * the real subnet.
+			 */
+			if (on_net(ws.to.sin_addr.s_addr,
+				   ntohl(dst), RT->rt_mask))
+				return 0;
+		}
+		nhop = 0;
+
+	} else {
+		/* Advertise the next hop if this is not a route for one
+		 * of our interfaces and the next hop is on the same
+		 * network as the target.
+		 */
+		if (!(RT->rt_state & RS_IF)
+		    && RT->rt_gate != myaddr
+		    && RT->rt_gate != loopaddr)
+			nhop = RT->rt_gate;
+		else
+			nhop = 0;
+	}
+
+	metric = RT->rt_metric;
+	ags = 0;
+
+	if (RT->rt_state & RS_MHOME) {
+		/* retain host route of multi-homed servers */
+		;
+
+	} else if (RT_ISHOST(RT)) {
+		/* We should always aggregate the host routes
+		 * for the local end of our point-to-point links.
+		 * If we are suppressing host routes in general, then do so.
+		 * Avoid advertising host routes onto their own network,
+		 * where they should be handled by proxy-ARP.
+		 */
+		if ((RT->rt_state & RS_LOCAL)
+		    || ridhosts
+		    || (ws.state & WS_ST_SUPER_AG)
+		    || on_net(dst, ws.to_net, ws.to_mask))
+			ags |= AGS_SUPPRESS;
+
+		if (ws.state & WS_ST_SUPER_AG)
+			ags |= AGS_PROMOTE;
+
+	} else if (ws.state & WS_ST_AG) {
+		/* Aggregate network routes, if we are allowed.
+		 */
+		ags |= AGS_SUPPRESS;
+
+		/* Generate supernets if allowed.
+		 * If we can be heard by RIPv1 systems, we will
+		 * later convert back to ordinary nets.
+		 * This unifies dealing with received supernets.
+		 */
+		if ((RT->rt_state & RS_SUBNET)
+		    || (ws.state & WS_ST_SUPER_AG))
+			ags |= AGS_PROMOTE;
+
+	}
+
+	/* Do not send RIPv1 advertisements of subnets to other
+	 * networks. If possible, multicast them by RIPv2.
+	 */
+	if ((RT->rt_state & RS_SUBNET)
+	    && !(ws.state & WS_ST_RIP2_ALL)
+	    && !on_net(dst, ws.to_std_net, ws.to_std_mask)) {
+		ags |= AGS_RIPV2 | AGS_PROMOTE;
+		if (ws.state & WS_ST_SUB_AG)
+			ags |= AGS_SUPPRESS;
+	}
+
+	/* Do not send a route back to where it came from, except in
+	 * response to a query.  This is "split-horizon".  That means not
+	 * advertising back to the same network	and so via the same interface.
+	 *
+	 * We want to suppress routes that might have been fragmented
+	 * from this route by a RIPv1 router and sent back to us, and so we
+	 * cannot forget this route here.  Let the split-horizon route
+	 * aggregate (suppress) the fragmented routes and then itself be
+	 * forgotten.
+	 *
+	 * Include the routes for both ends of point-to-point interfaces
+	 * since the other side presumably knows them as well as we do.
+	 */
+	if (RT->rt_ifp == ws.ifp && ws.ifp != 0
+	    && !(ws.state & WS_ST_QUERY)
+	    && (ws.state & WS_ST_TO_ON_NET)
+	    && (!(RT->rt_state & RS_IF)
+		|| ws.ifp->int_if_flags & IFF_POINTOPOINT)) {
+		/* Poison-reverse the route instead of only not advertising it
+		 * it is recently changed from some other route.
+		 * In almost all cases, if there is no spare for the route
+		 * then it is either old or a brand new route, and if it
+		 * is brand new, there is no need for poison-reverse.
+		 */
+		metric = HOPCNT_INFINITY;
+		if (RT->rt_poison_time < now_expire
+		    || RT->rt_spares[1].rts_gate ==0) {
+			ags |= AGS_SPLIT_HZ;
+			ags &= ~(AGS_PROMOTE | AGS_SUPPRESS);
+		}
+	}
+
+	/* Adjust the outgoing metric by the cost of the link.
+	 */
+	pref = metric + ws.metric;
+	if (pref < HOPCNT_INFINITY) {
+		/* Keep track of the best metric with which the
+		 * route has been advertised recently.
+		 */
+		if (RT->rt_poison_metric >= metric
+		    || RT->rt_poison_time < now_expire) {
+			RT->rt_poison_time = now.tv_sec;
+			RT->rt_poison_metric = metric;
+		}
+		metric = pref;
+
+	} else {
+		/* Do not advertise stable routes that will be ignored,
+		 * unless they are being held down and poisoned.  If the
+		 * route recently was advertised with a metric that would
+		 * have been less than infinity through this interface, we
+		 * need to continue to advertise it in order to poison it.
+		 */
+		pref = RT->rt_poison_metric + ws.metric;
+		if (pref >= HOPCNT_INFINITY
+		    || RT->rt_poison_time < now_garbage )
+			return 0;
+
+		metric = HOPCNT_INFINITY;
+	}
+
+	ag_check(dst, RT->rt_mask, 0, nhop, metric, pref,
+		 RT->rt_seqno, RT->rt_tag, ags, supply_out);
+	return 0;
+#undef RT
+}
+
+
+/* Supply dst with the contents of the routing tables.
+ * If this won't fit in one packet, chop it up into several.
+ */
+void
+supply(struct sockaddr_in *dst,
+       struct interface *ifp,		/* output interface */
+       enum output_type type,
+       int flash,			/* 1=flash update */
+       int vers)			/* RIP version */
+{
+	static int init = 1;
+	struct rt_entry *rt;
+
+
+	ws.state = 0;
+	ws.gen_limit = 1024;
+
+	ws.to = *dst;
+	ws.to_std_mask = std_mask(ws.to.sin_addr.s_addr);
+	ws.to_std_net = ntohl(ws.to.sin_addr.s_addr) & ws.to_std_mask;
+
+	if (ifp != 0) {
+		ws.to_mask = ifp->int_mask;
+		ws.to_net = ifp->int_net;
+		if (on_net(ws.to.sin_addr.s_addr, ws.to_net, ws.to_mask))
+			ws.state |= WS_ST_TO_ON_NET;
+
+	} else {
+		ws.to_mask = ripv1_mask_net(ws.to.sin_addr.s_addr, 0);
+		ws.to_net = ntohl(ws.to.sin_addr.s_addr) & ws.to_mask;
+		rt = rtfind(dst->sin_addr.s_addr);
+		if (rt)
+			ifp = rt->rt_ifp;
+	}
+
+	ws.npackets = 0;
+	if (flash)
+		ws.state |= WS_ST_FLASH;
+	if (type == OUT_QUERY)
+		ws.state |= WS_ST_QUERY;
+
+	if ((ws.ifp = ifp) == 0) {
+		ws.metric = 1;
+	} else {
+		/* Adjust the advertised metric by the outgoing interface
+		 * metric.
+		 */
+		ws.metric = ifp->int_metric+1;
+	}
+
+	if (init) {
+		init = 0;
+
+		bzero(&ripv12_buf, sizeof(ripv12_buf));
+		ripv12_buf.rip.rip_cmd = RIPCMD_RESPONSE;
+		ws.v12.buf = &ripv12_buf.rip;
+		ws.v12.base = &ws.v12.buf->rip_nets[0];
+		ws.v12.lim = ws.v12.base + NETS_LEN;
+
+		bzero(&rip_v2_buf, sizeof(rip_v2_buf));
+		rip_v2_buf.rip.rip_cmd = RIPCMD_RESPONSE;
+		rip_v2_buf.rip.rip_vers = RIPv2;
+		ws.v2.buf = &rip_v2_buf.rip;
+		ws.v2.base = &ws.v2.buf->rip_nets[0];
+		ws.v2.lim = ws.v2.base + NETS_LEN;
+	}
+	ripv12_buf.rip.rip_vers = vers;
+
+	ws.v12.n = ws.v12.base;
+	set_auth(&ws.v12);
+	ws.v2.n = ws.v2.base;
+	set_auth(&ws.v2);
+
+	switch (type) {
+	case OUT_BROADCAST:
+		ws.v2.type = ((ws.ifp != 0
+			       && (ws.ifp->int_if_flags & IFF_MULTICAST))
+			      ? OUT_MULTICAST
+			      : NO_OUT_MULTICAST);
+		ws.v12.type = OUT_BROADCAST;
+		break;
+	case OUT_MULTICAST:
+		ws.v2.type = ((ws.ifp != 0
+			       && (ws.ifp->int_if_flags & IFF_MULTICAST))
+			      ? OUT_MULTICAST
+			      : NO_OUT_MULTICAST);
+		ws.v12.type = OUT_BROADCAST;
+		break;
+	case OUT_UNICAST:
+	case OUT_QUERY:
+		ws.v2.type = (vers == RIPv2) ? type : NO_OUT_RIPV2;
+		ws.v12.type = type;
+		break;
+	default:
+		ws.v2.type = type;
+		ws.v12.type = type;
+		break;
+	}
+
+	if (vers == RIPv2) {
+		/* if asked to send RIPv2, send at least that which can
+		 * be safely heard by RIPv1 listeners.
+		 */
+		ws.state |= WS_ST_RIP2_SAFE;
+
+		/* full RIPv2 only if cannot be heard by RIPv1 listeners */
+		if (type != OUT_BROADCAST)
+			ws.state |= WS_ST_RIP2_ALL;
+		if (!(ws.state & WS_ST_TO_ON_NET)) {
+			ws.state |= (WS_ST_AG | WS_ST_SUPER_AG);
+		} else if (ws.ifp == 0 || !(ws.ifp->int_state & IS_NO_AG)) {
+			ws.state |= WS_ST_AG;
+			if (type != OUT_BROADCAST
+			    && (ws.ifp == 0
+				|| !(ws.ifp->int_state & IS_NO_SUPER_AG)))
+				ws.state |= WS_ST_SUPER_AG;
+		}
+
+	} else if (ws.ifp == 0 || !(ws.ifp->int_state & IS_NO_AG)) {
+		ws.state |= WS_ST_SUB_AG;
+	}
+
+	if (supplier) {
+		/*  Fake a default route if asked, and if there is not
+		 * a better, real default route.
+		 */
+		if (ifp->int_d_metric != 0
+		    && (0 == (rt = rtget(RIP_DEFAULT, 0))
+			|| rt->rt_metric+ws.metric >= ifp->int_d_metric)) {
+			ws.state |= WS_ST_DEFAULT;
+			ag_check(0, 0, 0, 0,
+				 ifp->int_d_metric,ifp->int_d_metric,
+				 0, 0, 0, supply_out);
+		}
+		if ((ws.state & WS_ST_RIP2_ALL)
+		    && (ifp->int_state & IS_PM_RDISC)) {
+			ws.state |= WS_ST_PM_RDISC;
+			ripv12_buf.rip.rip_vers = RIPv1;
+		}
+	}
+
+	(void)rn_walktree(rhead, walk_supply, 0);
+	ag_flush(0,0,supply_out);
+
+	/* Flush the packet buffers, provided they are not empty and
+	 * do not contain only the password.
+	 */
+	if (ws.v12.n != ws.v12.base
+	    && (ws.v12.n > ws.v12.base+1
+		|| ws.v12.n->n_family != RIP_AF_AUTH))
+		supply_write(&ws.v12);
+	if (ws.v2.n != ws.v2.base
+	    && (ws.v2.n > ws.v2.base+1
+		|| ws.v2.n->n_family != RIP_AF_AUTH))
+		supply_write(&ws.v2);
+
+	/* If we sent nothing and this is an answer to a query, send
+	 * an empty buffer.
+	 */
+	if (ws.npackets == 0
+	    && (ws.state & WS_ST_QUERY))
+		supply_write(&ws.v12);
+}
+
+
+/* send all of the routing table or just do a flash update
+ */
+void
+rip_bcast(int flash)
+{
+#ifdef _HAVE_SIN_LEN
+	static struct sockaddr_in dst = {sizeof(dst), AF_INET};
+#else
+	static struct sockaddr_in dst = {AF_INET};
+#endif
+	struct interface *ifp;
+	enum output_type type;
+	int vers;
+	struct timeval rtime;
+
+
+	need_flash = 0;
+	intvl_random(&rtime, MIN_WAITTIME, MAX_WAITTIME);
+	no_flash = rtime;
+	timevaladd(&no_flash, &now);
+
+	if (rip_sock < 0)
+		return;
+
+	trace_act("send %s and inhibit dynamic updates for %.3f sec\n",
+		  flash ? "dynamic update" : "all routes",
+		  rtime.tv_sec + ((float)rtime.tv_usec)/1000000.0);
+
+	for (ifp = ifnet; ifp != 0; ifp = ifp->int_next) {
+		/* skip interfaces not doing RIP, those already queried,
+		 * and aliases.  Do try broken interfaces to see
+		 * if they have healed.
+		 */
+		if (0 != (ifp->int_state & (IS_PASSIVE | IS_ALIAS)))
+			continue;
+
+		/* skip turned off interfaces */
+		if (!iff_alive(ifp->int_if_flags))
+			continue;
+
+		/* default to RIPv1 output */
+		if (ifp->int_state & IS_NO_RIPV1_OUT) {
+			/* Say nothing if this interface is turned off */
+			if (ifp->int_state & IS_NO_RIPV2_OUT)
+				continue;
+			vers = RIPv2;
+		} else {
+			vers = RIPv1;
+		}
+
+		if (ifp->int_if_flags & IFF_BROADCAST) {
+			/* ordinary, hardware interface */
+			dst.sin_addr.s_addr = ifp->int_brdaddr;
+			/* if RIPv1 is not turned off, then broadcast so
+			 * that RIPv1 listeners can hear.
+			 */
+			if (vers == RIPv2
+			    && (ifp->int_state & IS_NO_RIPV1_OUT)) {
+				type = OUT_MULTICAST;
+			} else {
+				type = OUT_BROADCAST;
+			}
+
+		} else if (ifp->int_if_flags & IFF_POINTOPOINT) {
+			/* point-to-point hardware interface */
+			dst.sin_addr.s_addr = ifp->int_dstaddr;
+			type = OUT_UNICAST;
+
+		} else {
+			/* remote interface */
+			dst.sin_addr.s_addr = ifp->int_addr;
+			type = OUT_UNICAST;
+		}
+
+		supply(&dst, ifp, type, flash, vers);
+	}
+
+	update_seqno++;			/* all routes are up to date */
+}
+
+
+/* Ask for routes
+ * Do it only once to an interface, and not even after the interface
+ * was broken and recovered.
+ */
+void
+rip_query(void)
+{
+#ifdef _HAVE_SIN_LEN
+	static struct sockaddr_in dst = {sizeof(dst), AF_INET};
+#else
+	static struct sockaddr_in dst = {AF_INET};
+#endif
+	struct interface *ifp;
+	struct rip buf;
+	enum output_type type;
+
+
+	if (rip_sock < 0)
+		return;
+
+	bzero(&buf, sizeof(buf));
+
+	for (ifp = ifnet; ifp; ifp = ifp->int_next) {
+		/* skip interfaces not doing RIP, those already queried,
+		 * and aliases.  Do try broken interfaces to see
+		 * if they have healed.
+		 */
+		if (0 != (ifp->int_state & (IS_RIP_QUERIED
+					    | IS_PASSIVE | IS_ALIAS)))
+			continue;
+
+		/* skip turned off interfaces */
+		if (!iff_alive(ifp->int_if_flags))
+			continue;
+
+		/* default to RIPv1 output */
+		if (ifp->int_state & IS_NO_RIPV2_OUT) {
+			/* Say nothing if this interface is turned off */
+			if (ifp->int_state & IS_NO_RIPV1_OUT)
+				continue;
+			buf.rip_vers = RIPv1;
+		} else {
+			buf.rip_vers = RIPv2;
+		}
+
+		buf.rip_cmd = RIPCMD_REQUEST;
+		buf.rip_nets[0].n_family = RIP_AF_UNSPEC;
+		buf.rip_nets[0].n_metric = htonl(HOPCNT_INFINITY);
+
+		if (ifp->int_if_flags & IFF_BROADCAST) {
+			/* ordinary, hardware interface */
+			dst.sin_addr.s_addr = ifp->int_brdaddr;
+			/* if RIPv1 is not turned off, then broadcast so
+			 * that RIPv1 listeners can hear.
+			 */
+			if (buf.rip_vers == RIPv2
+			    && (ifp->int_state & IS_NO_RIPV1_OUT)) {
+				type = OUT_MULTICAST;
+			} else {
+				type = OUT_BROADCAST;
+			}
+
+		} else if (ifp->int_if_flags & IFF_POINTOPOINT) {
+			/* point-to-point hardware interface */
+			dst.sin_addr.s_addr = ifp->int_dstaddr;
+			type = OUT_UNICAST;
+
+		} else {
+			/* remote interface */
+			dst.sin_addr.s_addr = ifp->int_addr;
+			type = OUT_UNICAST;
+		}
+
+		ifp->int_state |= IS_RIP_QUERIED;
+		if (output(type, &dst, ifp, &buf, sizeof(buf)) < 0)
+			if_sick(ifp);
+	}
+}