[apple/xnu.git] / bsd / netat / ddp_rtmp.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 *	Copyright (c) 1993-1998 Apple Computer, Inc.
 *	All Rights Reserved.
 */

/*
 *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
 */

#include <sys/errno.h>
#include <sys/types.h>
#include <sys/param.h>
#include <machine/spl.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/filedesc.h>
#include <sys/fcntl.h>
#include <sys/mbuf.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>

#include <net/if.h>

#include <netat/sysglue.h>
#include <netat/appletalk.h>
#include <netat/at_var.h>
#include <netat/ddp.h>
#include <netat/rtmp.h>
#include <netat/zip.h>
#include <netat/routing_tables.h>
#include <netat/debug.h>
#include <netat/at_pcb.h>

#include <sys/kern_event.h>

extern void rtmp_router_input();

/****************************************************************/
/*								*/
/*								*/
/*			RTMP Protocol				*/
/*								*/
/*								*/
/****************************************************************/


/* rtmp.c: , 1.6; 2/26/93; Apple Computer, Inc." */


#define	NROUTERS2TRAK	8
#define	FIFTYSECS	10
#define NODE(r)		((r)->ifARouter.s_node)
#define NET(r)		((r)->ifARouter.s_net)
#define	INUSE(r)	(NODE(r))

void ddp_age_router();

static struct routerinfo {
	struct at_addr ifARouter;
	at_ifaddr_t	  *ifID;
	void		  *tmo;
} trackedrouters[NROUTERS2TRAK];

void trackrouter_rem_if(ifID)
     register at_ifaddr_t *ifID;
{
	register i;
	register struct routerinfo *router;

	for (i = NROUTERS2TRAK; --i >= 0;) {
		router = &trackedrouters[i];
		if (trackedrouters[i].ifID == ifID) {
			untimeout(ddp_age_router, (caddr_t)router);
			break;
		}
	}
}


void routershutdown()
{
	register i;

	for (i = NROUTERS2TRAK; --i >= 0;) {
		register struct routerinfo *router;

		router = &trackedrouters[i];
		if (INUSE(router)) {
			untimeout(ddp_age_router, (caddr_t) router);
			bzero((caddr_t) router, sizeof(struct routerinfo));
		}
	}
}

int router_added  = 0;
int router_killed = 0;


void trackrouter(ifID, net, node)
     register at_ifaddr_t *ifID;
     register unsigned short	net;
     register unsigned char	node;
{
	register struct routerinfo *unused = NULL;
	register i;

	for (i = NROUTERS2TRAK; --i >= 0;) {
		register struct routerinfo *router;

		router = &trackedrouters[(i + node) & (NROUTERS2TRAK-1)];
		if ((NODE(router) == node) && (NET(router) == net)) {
			untimeout(ddp_age_router, (caddr_t) router);
			timeout(ddp_age_router, (caddr_t) router, 50*SYS_HZ);
			unused = NULL;
			break;
		}
		else if (!INUSE(router) && !unused)
			unused = router;
	}
	if (unused) {
		router_added++;

		if (ifID->ifARouter.s_net == 0) {
			/* Send event that this interface just got a router. This does not
				discriminate on whether this router is valid or not. If it is not
				valid rtmp_input will send a KEV_ATALK_ROUTERUP_INVALID event. */
			atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP, 0, 0);
		}
		
		unused->ifID = ifID;
		NET(unused) =  net;
		NODE(unused) = node;
		ifID->ifRouterState = ROUTER_AROUND;
		timeout(ddp_age_router, (caddr_t) unused, 50*SYS_HZ);
		
		if (NET(ifID) == 0 && NODE(ifID) == 0) {
			NET(ifID) = net;
			NODE(ifID) = node;
		}
	}
}

/*
 * This is the timeout function that is called after 50 seconds, 
 * if no router packets come in. That way we won't send extended 
 * frames to something that is not there. Untimeout is called if 
 * an RTMP packet comes in so this routine will not be called.
 */
void ddp_age_router(deadrouter)
     register struct routerinfo *deadrouter;
{
	register at_ifaddr_t *ourrouter = deadrouter->ifID;
	boolean_t 	funnel_state;

	funnel_state = thread_funnel_set(network_flock, TRUE);
        
	dPrintf(D_M_RTMP, D_L_INFO, 
		("ddp_age_router called deadrouter=%d:%d\n", NODE(deadrouter), NET(deadrouter)));

	router_killed++;

	if (NODE(ourrouter) == NODE(deadrouter) && 
	    NET(ourrouter) == NET(deadrouter)) {
		register unsigned long	atrandom = random();
		register struct routerinfo *newrouter;
		register i;

		bzero((caddr_t) deadrouter, sizeof(struct routerinfo));
		for (i = NROUTERS2TRAK; --i >= 0;) {
			newrouter = &trackedrouters[(i + atrandom) & (NROUTERS2TRAK-1)];
			if (INUSE(newrouter))
				break;
			else
				newrouter = NULL;
		}
		if (newrouter) {
			/* Set our router to another on the list and go on with life */
			NET(ourrouter) = NET(newrouter);
			NODE(ourrouter) = NODE(newrouter);
		}
		else {
			/* from gorouterless() */
			/* We have no other routers. */
			ATTRACE(AT_MID_DDP, AT_SID_TIMERS, AT_LV_WARNING, FALSE,
				"ddp_age_router entry : ARouter = 0x%x, RouterState = 0x%x",
				ATALK_VALUE(ourrouter->ifARouter), ourrouter->ifRouterState, 0);

			switch (ourrouter->ifRouterState) {
			case ROUTER_AROUND :
				/* This is where we lose our cable.
					Reset router fields and state accordingly. */
				ourrouter->ifARouter.s_net = 0;
				ourrouter->ifARouter.s_node = 0;
				ourrouter->ifThisCableStart = DDP_MIN_NETWORK;
				ourrouter->ifThisCableEnd = DDP_MAX_NETWORK;
				ourrouter->ifRouterState = NO_ROUTER;

				/* Send event to indicate that we've lost our seed router. */
				atalk_post_msg(ourrouter->aa_ifp, KEV_ATALK_ROUTERDOWN, 0, 0);

				zip_control(ourrouter, ZIP_NO_ROUTER);
				break;
			case ROUTER_WARNING :
				/* there was a router that we were ignoring...
				 * now, even that's gone.  But we want to tackle the
				 * case where another router may come up after all
				 * of them have died...
				 */
				ourrouter->ifRouterState = NO_ROUTER;
				break;
			}
		}
	} else
	        bzero((caddr_t) deadrouter, sizeof(struct routerinfo));

        (void) thread_funnel_set(network_flock, FALSE);
        
} /* ddp_age_router */

void rtmp_input (mp, ifID)
     register gbuf_t *mp;
     register at_ifaddr_t *ifID;
{
	register at_net_al	this_net;
	register at_net_al	range_start, range_end;
	register at_ddp_t	*ddp = (at_ddp_t *)gbuf_rptr(mp);
				/* NOTE: there is an assumption here that the 
				 * DATA follows the header. */
	register at_rtmp	*rtmp = (at_rtmp *)ddp->data;

	if (gbuf_type(mp) != MSG_DATA) {
		/* If this is a M_ERROR message, DDP is shutting down, 
		 * nothing to do here...If it's something else, we don't 
		 * understand what it is
		 */
		gbuf_freem(mp);
		return;
	}

	if (!ifID) {
		gbuf_freem(mp);
		return;
	}
	if (gbuf_len(mp) < (DDP_X_HDR_SIZE + sizeof(at_rtmp))) {
		gbuf_freem(mp);
		return;
	}
	this_net = ifID->ifThisNode.s_net;
	if (rtmp->at_rtmp_id_length  != 8) {
		gbuf_freem(mp);
		return;
	}

	{
		at_rtmp_tuple *tp;
		tp = ((at_rtmp_tuple *)&rtmp->at_rtmp_id[1]);
		range_start = NET_VALUE(tp->at_rtmp_net);
		tp = ((at_rtmp_tuple *)&rtmp->at_rtmp_id[4]);
		range_end = NET_VALUE(tp->at_rtmp_net);

		if (ifID->ifRouterState == ROUTER_AROUND) {
			if ((ifID->ifThisCableStart == range_start) &&
			    (ifID->ifThisCableEnd == range_end)) {
				trackrouter(ifID,
					    NET_VALUE(rtmp->at_rtmp_this_net),
					    rtmp->at_rtmp_id[0]
					    );
			}
		} else {
			/* There was no router around earlier, one
			 * probably just came up.
			 */
			if ((this_net >= DDP_STARTUP_LOW) && 
			    (this_net <= DDP_STARTUP_HIGH)) {
				/* we're operating in the startup range,
				 * ignore the presence of router
				 */
				if (ifID->ifRouterState == NO_ROUTER) {
					dPrintf(D_M_RTMP, D_L_INFO, ("rtmp_input: new router came up, INVALID: net \
						in startup range.\n"));
					/* trackrouter sends a KEV_ATALK_ROUTERUP event to note that
						a new router has come up when we had none before. */
					trackrouter(ifID,
						    NET_VALUE(rtmp->at_rtmp_this_net),
						    rtmp->at_rtmp_id[0]
						    );
					ifID->ifRouterState = ROUTER_WARNING;
					
					/* This router is invalid. Send event. */
					atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP_INVALID, 0, 0);
				}
			} else {
				/* our address
				 * is not in startup range; Is our
				 * address good for the cable??
				 */
				if ((this_net >= range_start) &&
				    (this_net <= range_end)) {
					/* Our address is in the range
					 * valid for this cable... Note
					 * the router address and then
					 * get ZIP rolling to get the
					 * zone info.
					 */
					ifID->ifThisCableStart = range_start;
					ifID->ifThisCableEnd = range_end;

					/* A seed router that gives us back our cable range came up.
						It's a valid router and gives us our network back. */
					atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP, 0, 0);

					trackrouter(ifID,
						    NET_VALUE(rtmp->at_rtmp_this_net),
						    rtmp->at_rtmp_id[0]
						    );
					zip_control(ifID, ZIP_LATE_ROUTER);
				} else {
					/* Our address is not in the
					 * range valid for this cable..
					 * ignore presence of the 
					 * router
					 */
					if (ifID->ifRouterState == NO_ROUTER) {
						/* trackrouter sends a KEV_ATALK_ROUTERUP event to note that
							a new router has come up when we had none before. */
						trackrouter(ifID,
							    NET_VALUE(rtmp->at_rtmp_this_net),
							    rtmp->at_rtmp_id[0]
							    );
						ifID->ifRouterState = ROUTER_WARNING;

						/* A new seed router came up, but the cable range is different
							than what we had before. */
						atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP_INVALID, 0, 0);
					}
				}
			}
		}
	}

	gbuf_freem(mp);
	return;
}


void rtmp_init()
{
  bzero((caddr_t)trackedrouters, sizeof(struct routerinfo)*NROUTERS2TRAK);
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Copyright (c) 1993-1998 Apple Computer, Inc.
	24	* All Rights Reserved.
	25	*/
	26
	27	/*
	28	* Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
	29	*/
	30
	31	#include <sys/errno.h>
	32	#include <sys/types.h>
	33	#include <sys/param.h>
	34	#include <machine/spl.h>
	35	#include <sys/systm.h>
	36	#include <sys/kernel.h>
	37	#include <sys/proc.h>
	38	#include <sys/filedesc.h>
	39	#include <sys/fcntl.h>
	40	#include <sys/mbuf.h>
	41	#include <sys/ioctl.h>
	42	#include <sys/malloc.h>
	43	#include <sys/socket.h>
	44	#include <sys/socketvar.h>
	45
	46	#include <net/if.h>
	47
	48	#include <netat/sysglue.h>
	49	#include <netat/appletalk.h>
	50	#include <netat/at_var.h>
	51	#include <netat/ddp.h>
	52	#include <netat/rtmp.h>
	53	#include <netat/zip.h>
	54	#include <netat/routing_tables.h>
	55	#include <netat/debug.h>
	56	#include <netat/at_pcb.h>
	57
9bccf70c A	58	#include <sys/kern_event.h>
9bccf70c A	59
1c79356b A	60	extern void rtmp_router_input();
	61
	62	/****************************************************************/
	63	/* */
	64	/* */
	65	/* RTMP Protocol */
	66	/* */
	67	/* */
	68	/****************************************************************/
	69
	70
	71	/* rtmp.c: , 1.6; 2/26/93; Apple Computer, Inc." */
	72
	73
	74	#define NROUTERS2TRAK 8
	75	#define FIFTYSECS 10
	76	#define NODE(r) ((r)->ifARouter.s_node)
	77	#define NET(r) ((r)->ifARouter.s_net)
	78	#define INUSE(r) (NODE(r))
	79
	80	void ddp_age_router();
	81
	82	static struct routerinfo {
	83	struct at_addr ifARouter;
	84	at_ifaddr_t *ifID;
	85	void *tmo;
	86	} trackedrouters[NROUTERS2TRAK];
	87
	88	void trackrouter_rem_if(ifID)
	89	register at_ifaddr_t *ifID;
	90	{
	91	register i;
	92	register struct routerinfo *router;
	93
	94	for (i = NROUTERS2TRAK; --i >= 0;) {
	95	router = &trackedrouters[i];
	96	if (trackedrouters[i].ifID == ifID) {
	97	untimeout(ddp_age_router, (caddr_t)router);
	98	break;
	99	}
	100	}
	101	}
	102
	103
	104	void routershutdown()
	105	{
	106	register i;
	107
	108	for (i = NROUTERS2TRAK; --i >= 0;) {
	109	register struct routerinfo *router;
	110
	111	router = &trackedrouters[i];
	112	if (INUSE(router)) {
	113	untimeout(ddp_age_router, (caddr_t) router);
	114	bzero((caddr_t) router, sizeof(struct routerinfo));
	115	}
	116	}
	117	}
	118
	119	int router_added = 0;
	120	int router_killed = 0;
	121
	122
	123
124	void trackrouter(ifID, net, node)
125	register at_ifaddr_t *ifID;
126	register unsigned short net;
127	register unsigned char node;
128	{
129	register struct routerinfo *unused = NULL;
130	register i;
131
132	for (i = NROUTERS2TRAK; --i >= 0;) {
133	register struct routerinfo *router;
134
135	router = &trackedrouters[(i + node) & (NROUTERS2TRAK-1)];
136	if ((NODE(router) == node) && (NET(router) == net)) {
137	untimeout(ddp_age_router, (caddr_t) router);
138	timeout(ddp_age_router, (caddr_t) router, 50*SYS_HZ);
139	unused = NULL;
140	break;
141	}
142	else if (!INUSE(router) && !unused)
143	unused = router;
144	}
145	if (unused) {
9bccf70c	146	router_added++;
1c79356b	147
9bccf70c A	148	if (ifID->ifARouter.s_net == 0) {
	149	/* Send event that this interface just got a router. This does not
	150	discriminate on whether this router is valid or not. If it is not
	151	valid rtmp_input will send a KEV_ATALK_ROUTERUP_INVALID event. */
	152	atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP, 0, 0);
	153	}
	154
1c79356b A	155	unused->ifID = ifID;
	156	NET(unused) = net;
	157	NODE(unused) = node;
9bccf70c	158	ifID->ifRouterState = ROUTER_AROUND;
1c79356b	159	timeout(ddp_age_router, (caddr_t) unused, 50*SYS_HZ);
9bccf70c	160
1c79356b A	161	if (NET(ifID) == 0 && NODE(ifID) == 0) {
	162	NET(ifID) = net;
	163	NODE(ifID) = node;
1c79356b A	164	}
	165	}
	166	}
	167
	168	/*
	169	* This is the timeout function that is called after 50 seconds,
	170	* if no router packets come in. That way we won't send extended
	171	* frames to something that is not there. Untimeout is called if
	172	* an RTMP packet comes in so this routine will not be called.
	173	*/
	174	void ddp_age_router(deadrouter)
	175	register struct routerinfo *deadrouter;
	176	{
	177	register at_ifaddr_t *ourrouter = deadrouter->ifID;
	178	boolean_t funnel_state;
	179
	180	funnel_state = thread_funnel_set(network_flock, TRUE);
	181
	182	dPrintf(D_M_RTMP, D_L_INFO,
	183	("ddp_age_router called deadrouter=%d:%d\n", NODE(deadrouter), NET(deadrouter)));
	184
	185	router_killed++;
	186
	187	if (NODE(ourrouter) == NODE(deadrouter) &&
	188	NET(ourrouter) == NET(deadrouter)) {
	189	register unsigned long atrandom = random();
	190	register struct routerinfo *newrouter;
	191	register i;
	192
	193	bzero((caddr_t) deadrouter, sizeof(struct routerinfo));
	194	for (i = NROUTERS2TRAK; --i >= 0;) {
	195	newrouter = &trackedrouters[(i + atrandom) & (NROUTERS2TRAK-1)];
	196	if (INUSE(newrouter))
	197	break;
	198	else
	199	newrouter = NULL;
	200	}
	201	if (newrouter) {
9bccf70c	202	/* Set our router to another on the list and go on with life */
1c79356b A	203	NET(ourrouter) = NET(newrouter);
	204	NODE(ourrouter) = NODE(newrouter);
	205	}
	206	else {
	207	/* from gorouterless() */
9bccf70c	208	/* We have no other routers. */
1c79356b A	209	ATTRACE(AT_MID_DDP, AT_SID_TIMERS, AT_LV_WARNING, FALSE,
	210	"ddp_age_router entry : ARouter = 0x%x, RouterState = 0x%x",
	211	ATALK_VALUE(ourrouter->ifARouter), ourrouter->ifRouterState, 0);
	212
	213	switch (ourrouter->ifRouterState) {
	214	case ROUTER_AROUND :
9bccf70c A	215	/* This is where we lose our cable.
9bccf70c A	216	Reset router fields and state accordingly. */
1c79356b A	217	ourrouter->ifARouter.s_net = 0;
1c79356b A	218	ourrouter->ifARouter.s_node = 0;
1c79356b A	219	ourrouter->ifThisCableStart = DDP_MIN_NETWORK;
	220	ourrouter->ifThisCableEnd = DDP_MAX_NETWORK;
	221	ourrouter->ifRouterState = NO_ROUTER;
9bccf70c A	222
	223	/* Send event to indicate that we've lost our seed router. */
	224	atalk_post_msg(ourrouter->aa_ifp, KEV_ATALK_ROUTERDOWN, 0, 0);
	225
1c79356b A	226	zip_control(ourrouter, ZIP_NO_ROUTER);
	227	break;
	228	case ROUTER_WARNING :
	229	/* there was a router that we were ignoring...
	230	* now, even that's gone. But we want to tackle the
	231	* case where another router may come up after all
	232	* of them have died...
	233	*/
	234	ourrouter->ifRouterState = NO_ROUTER;
	235	break;
	236	}
	237	}
	238	} else
	239	bzero((caddr_t) deadrouter, sizeof(struct routerinfo));
	240
	241	(void) thread_funnel_set(network_flock, FALSE);
	242
	243	} /* ddp_age_router */
	244
	245	void rtmp_input (mp, ifID)
	246	register gbuf_t *mp;
	247	register at_ifaddr_t *ifID;
	248	{
	249	register at_net_al this_net;
	250	register at_net_al range_start, range_end;
	251	register at_ddp_t ddp = (at_ddp_t )gbuf_rptr(mp);
	252	/* NOTE: there is an assumption here that the
	253	* DATA follows the header. */
	254	register at_rtmp rtmp = (at_rtmp )ddp->data;
	255
	256	if (gbuf_type(mp) != MSG_DATA) {
	257	/* If this is a M_ERROR message, DDP is shutting down,
	258	* nothing to do here...If it's something else, we don't
	259	* understand what it is
	260	*/
	261	gbuf_freem(mp);
	262	return;
	263	}
	264
	265	if (!ifID) {
	266	gbuf_freem(mp);
	267	return;
	268	}
	269	if (gbuf_len(mp) < (DDP_X_HDR_SIZE + sizeof(at_rtmp))) {
	270	gbuf_freem(mp);
	271	return;
	272	}
	273	this_net = ifID->ifThisNode.s_net;
	274	if (rtmp->at_rtmp_id_length != 8) {
	275	gbuf_freem(mp);
	276	return;
	277	}
	278
	279	{
	280	at_rtmp_tuple *tp;
	281	tp = ((at_rtmp_tuple *)&rtmp->at_rtmp_id[1]);
	282	range_start = NET_VALUE(tp->at_rtmp_net);
	283	tp = ((at_rtmp_tuple *)&rtmp->at_rtmp_id[4]);
	284	range_end = NET_VALUE(tp->at_rtmp_net);
	285
	286	if (ifID->ifRouterState == ROUTER_AROUND) {
	287	if ((ifID->ifThisCableStart == range_start) &&
	288	(ifID->ifThisCableEnd == range_end)) {
	289	trackrouter(ifID,
290	NET_VALUE(rtmp->at_rtmp_this_net),
291	rtmp->at_rtmp_id[0]
292	);
293	}
294	} else {
295	/* There was no router around earlier, one
296	* probably just came up.
297	*/
298	if ((this_net >= DDP_STARTUP_LOW) &&
299	(this_net <= DDP_STARTUP_HIGH)) {
300	/* we're operating in the startup range,
301	* ignore the presence of router
302	*/
303	if (ifID->ifRouterState == NO_ROUTER) {
9bccf70c A	304	dPrintf(D_M_RTMP, D_L_INFO, ("rtmp_input: new router came up, INVALID: net \
	305	in startup range.\n"));
	306	/* trackrouter sends a KEV_ATALK_ROUTERUP event to note that
	307	a new router has come up when we had none before. */
1c79356b A	308	trackrouter(ifID,
	309	NET_VALUE(rtmp->at_rtmp_this_net),
	310	rtmp->at_rtmp_id[0]
	311	);
	312	ifID->ifRouterState = ROUTER_WARNING;
9bccf70c A	313
	314	/* This router is invalid. Send event. */
	315	atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP_INVALID, 0, 0);
1c79356b A	316	}
	317	} else {
	318	/* our address
	319	* is not in startup range; Is our
	320	* address good for the cable??
	321	*/
	322	if ((this_net >= range_start) &&
	323	(this_net <= range_end)) {
	324	/* Our address is in the range
	325	* valid for this cable... Note
	326	* the router address and then
	327	* get ZIP rolling to get the
	328	* zone info.
	329	*/
	330	ifID->ifThisCableStart = range_start;
	331	ifID->ifThisCableEnd = range_end;
9bccf70c A	332
	333	/* A seed router that gives us back our cable range came up.
	334	It's a valid router and gives us our network back. */
	335	atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP, 0, 0);
	336
1c79356b A	337	trackrouter(ifID,
	338	NET_VALUE(rtmp->at_rtmp_this_net),
	339	rtmp->at_rtmp_id[0]
	340	);
	341	zip_control(ifID, ZIP_LATE_ROUTER);
	342	} else {
	343	/* Our address is not in the
	344	* range valid for this cable..
	345	* ignore presence of the
	346	* router
	347	*/
	348	if (ifID->ifRouterState == NO_ROUTER) {
9bccf70c A	349	/* trackrouter sends a KEV_ATALK_ROUTERUP event to note that
9bccf70c A	350	a new router has come up when we had none before. */
1c79356b A	351	trackrouter(ifID,
	352	NET_VALUE(rtmp->at_rtmp_this_net),
	353	rtmp->at_rtmp_id[0]
	354	);
	355	ifID->ifRouterState = ROUTER_WARNING;
9bccf70c A	356
	357	/* A new seed router came up, but the cable range is different
	358	than what we had before. */
	359	atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP_INVALID, 0, 0);
1c79356b A	360	}
	361	}
	362	}
	363	}
	364	}
	365
	366	gbuf_freem(mp);
	367	return;
	368	}
	369
	370
	371	void rtmp_init()
	372	{
	373	bzero((caddr_t)trackedrouters, sizeof(struct routerinfo)*NROUTERS2TRAK);
	374	}
	375
	376