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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The 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, QUIET ENJOYMENT 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;

	atalk_lock();
			
	ourrouter = deadrouter->ifID;
	if (ourrouter == NULL) {
		atalk_unlock();
		return;
	}
        
	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));

	atalk_unlock();
        
} /* 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	*
ff6e181a A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
1c79356b	12	*
ff6e181a A	13	* The Original Code and all software distributed under the License are
ff6e181a A	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
ff6e181a A	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
1c79356b A	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	/*
	24	* Copyright (c) 1993-1998 Apple Computer, Inc.
	25	* All Rights Reserved.
	26	*/
	27
	28	/*
	29	* Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
	30	*/
	31
	32	#include <sys/errno.h>
	33	#include <sys/types.h>
	34	#include <sys/param.h>
	35	#include <machine/spl.h>
	36	#include <sys/systm.h>
	37	#include <sys/kernel.h>
	38	#include <sys/proc.h>
	39	#include <sys/filedesc.h>
	40	#include <sys/fcntl.h>
	41	#include <sys/mbuf.h>
	42	#include <sys/ioctl.h>
	43	#include <sys/malloc.h>
	44	#include <sys/socket.h>
	45	#include <sys/socketvar.h>
	46
	47	#include <net/if.h>
	48
	49	#include <netat/sysglue.h>
	50	#include <netat/appletalk.h>
	51	#include <netat/at_var.h>
	52	#include <netat/ddp.h>
	53	#include <netat/rtmp.h>
	54	#include <netat/zip.h>
	55	#include <netat/routing_tables.h>
	56	#include <netat/debug.h>
	57	#include <netat/at_pcb.h>
	58
9bccf70c A	59	#include <sys/kern_event.h>
9bccf70c A	60
1c79356b A	61	extern void rtmp_router_input();
	62
	63	/****************************************************************/
	64	/* */
	65	/* */
	66	/* RTMP Protocol */
	67	/* */
	68	/* */
	69	/****************************************************************/
	70
	71
	72	/* rtmp.c: , 1.6; 2/26/93; Apple Computer, Inc." */
	73
	74
	75	#define NROUTERS2TRAK 8
	76	#define FIFTYSECS 10
	77	#define NODE(r) ((r)->ifARouter.s_node)
	78	#define NET(r) ((r)->ifARouter.s_net)
	79	#define INUSE(r) (NODE(r))
	80
	81	void ddp_age_router();
	82
	83	static struct routerinfo {
	84	struct at_addr ifARouter;
	85	at_ifaddr_t *ifID;
	86	void *tmo;
	87	} trackedrouters[NROUTERS2TRAK];
	88
	89	void trackrouter_rem_if(ifID)
	90	register at_ifaddr_t *ifID;
	91	{
	92	register i;
	93	register struct routerinfo *router;
	94
	95	for (i = NROUTERS2TRAK; --i >= 0;) {
	96	router = &trackedrouters[i];
	97	if (trackedrouters[i].ifID == ifID) {
	98	untimeout(ddp_age_router, (caddr_t)router);
	99	break;
	100	}
	101	}
	102	}
	103
	104
	105	void routershutdown()
	106	{
	107	register i;
	108
	109	for (i = NROUTERS2TRAK; --i >= 0;) {
	110	register struct routerinfo *router;
	111
	112	router = &trackedrouters[i];
	113	if (INUSE(router)) {
	114	untimeout(ddp_age_router, (caddr_t) router);
	115	bzero((caddr_t) router, sizeof(struct routerinfo));
	116	}
	117	}
	118	}
	119
	120	int router_added = 0;
	121	int router_killed = 0;
	122
	123
	124
125	void trackrouter(ifID, net, node)
126	register at_ifaddr_t *ifID;
127	register unsigned short net;
128	register unsigned char node;
129	{
130	register struct routerinfo *unused = NULL;
131	register i;
132
133	for (i = NROUTERS2TRAK; --i >= 0;) {
134	register struct routerinfo *router;
135
136	router = &trackedrouters[(i + node) & (NROUTERS2TRAK-1)];
137	if ((NODE(router) == node) && (NET(router) == net)) {
138	untimeout(ddp_age_router, (caddr_t) router);
139	timeout(ddp_age_router, (caddr_t) router, 50*SYS_HZ);
140	unused = NULL;
141	break;
142	}
143	else if (!INUSE(router) && !unused)
144	unused = router;
145	}
146	if (unused) {
9bccf70c	147	router_added++;
1c79356b	148
9bccf70c A	149	if (ifID->ifARouter.s_net == 0) {
	150	/* Send event that this interface just got a router. This does not
	151	discriminate on whether this router is valid or not. If it is not
	152	valid rtmp_input will send a KEV_ATALK_ROUTERUP_INVALID event. */
	153	atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP, 0, 0);
	154	}
	155
1c79356b A	156	unused->ifID = ifID;
	157	NET(unused) = net;
	158	NODE(unused) = node;
9bccf70c	159	ifID->ifRouterState = ROUTER_AROUND;
1c79356b	160	timeout(ddp_age_router, (caddr_t) unused, 50*SYS_HZ);
9bccf70c	161
1c79356b A	162	if (NET(ifID) == 0 && NODE(ifID) == 0) {
	163	NET(ifID) = net;
	164	NODE(ifID) = node;
1c79356b A	165	}
	166	}
	167	}
	168
	169	/*
	170	* This is the timeout function that is called after 50 seconds,
	171	* if no router packets come in. That way we won't send extended
	172	* frames to something that is not there. Untimeout is called if
	173	* an RTMP packet comes in so this routine will not be called.
	174	*/
	175	void ddp_age_router(deadrouter)
	176	register struct routerinfo *deadrouter;
	177	{
91447636	178	register at_ifaddr_t *ourrouter;
1c79356b	179
91447636 A	180	atalk_lock();
	181
	182	ourrouter = deadrouter->ifID;
	183	if (ourrouter == NULL) {
	184	atalk_unlock();
	185	return;
	186	}
1c79356b A	187
	188	dPrintf(D_M_RTMP, D_L_INFO,
	189	("ddp_age_router called deadrouter=%d:%d\n", NODE(deadrouter), NET(deadrouter)));
	190
	191	router_killed++;
	192
	193	if (NODE(ourrouter) == NODE(deadrouter) &&
	194	NET(ourrouter) == NET(deadrouter)) {
	195	register unsigned long atrandom = random();
	196	register struct routerinfo *newrouter;
	197	register i;
	198
	199	bzero((caddr_t) deadrouter, sizeof(struct routerinfo));
	200	for (i = NROUTERS2TRAK; --i >= 0;) {
	201	newrouter = &trackedrouters[(i + atrandom) & (NROUTERS2TRAK-1)];
	202	if (INUSE(newrouter))
	203	break;
	204	else
	205	newrouter = NULL;
	206	}
	207	if (newrouter) {
9bccf70c	208	/* Set our router to another on the list and go on with life */
1c79356b A	209	NET(ourrouter) = NET(newrouter);
	210	NODE(ourrouter) = NODE(newrouter);
	211	}
	212	else {
	213	/* from gorouterless() */
9bccf70c	214	/* We have no other routers. */
1c79356b A	215	ATTRACE(AT_MID_DDP, AT_SID_TIMERS, AT_LV_WARNING, FALSE,
	216	"ddp_age_router entry : ARouter = 0x%x, RouterState = 0x%x",
	217	ATALK_VALUE(ourrouter->ifARouter), ourrouter->ifRouterState, 0);
	218
	219	switch (ourrouter->ifRouterState) {
	220	case ROUTER_AROUND :
9bccf70c A	221	/* This is where we lose our cable.
9bccf70c A	222	Reset router fields and state accordingly. */
1c79356b A	223	ourrouter->ifARouter.s_net = 0;
1c79356b A	224	ourrouter->ifARouter.s_node = 0;
1c79356b A	225	ourrouter->ifThisCableStart = DDP_MIN_NETWORK;
	226	ourrouter->ifThisCableEnd = DDP_MAX_NETWORK;
	227	ourrouter->ifRouterState = NO_ROUTER;
9bccf70c A	228
	229	/* Send event to indicate that we've lost our seed router. */
	230	atalk_post_msg(ourrouter->aa_ifp, KEV_ATALK_ROUTERDOWN, 0, 0);
	231
1c79356b A	232	zip_control(ourrouter, ZIP_NO_ROUTER);
	233	break;
	234	case ROUTER_WARNING :
	235	/* there was a router that we were ignoring...
	236	* now, even that's gone. But we want to tackle the
	237	* case where another router may come up after all
	238	* of them have died...
	239	*/
	240	ourrouter->ifRouterState = NO_ROUTER;
	241	break;
	242	}
	243	}
	244	} else
	245	bzero((caddr_t) deadrouter, sizeof(struct routerinfo));
	246
91447636	247	atalk_unlock();
1c79356b A	248
	249	} /* ddp_age_router */
	250
	251	void rtmp_input (mp, ifID)
	252	register gbuf_t *mp;
	253	register at_ifaddr_t *ifID;
	254	{
	255	register at_net_al this_net;
	256	register at_net_al range_start, range_end;
	257	register at_ddp_t ddp = (at_ddp_t )gbuf_rptr(mp);
	258	/* NOTE: there is an assumption here that the
	259	* DATA follows the header. */
	260	register at_rtmp rtmp = (at_rtmp )ddp->data;
	261
	262	if (gbuf_type(mp) != MSG_DATA) {
	263	/* If this is a M_ERROR message, DDP is shutting down,
	264	* nothing to do here...If it's something else, we don't
	265	* understand what it is
	266	*/
	267	gbuf_freem(mp);
	268	return;
	269	}
	270
	271	if (!ifID) {
	272	gbuf_freem(mp);
	273	return;
	274	}
	275	if (gbuf_len(mp) < (DDP_X_HDR_SIZE + sizeof(at_rtmp))) {
	276	gbuf_freem(mp);
	277	return;
	278	}
	279	this_net = ifID->ifThisNode.s_net;
	280	if (rtmp->at_rtmp_id_length != 8) {
	281	gbuf_freem(mp);
	282	return;
	283	}
	284
	285	{
	286	at_rtmp_tuple *tp;
	287	tp = ((at_rtmp_tuple *)&rtmp->at_rtmp_id[1]);
	288	range_start = NET_VALUE(tp->at_rtmp_net);
	289	tp = ((at_rtmp_tuple *)&rtmp->at_rtmp_id[4]);
	290	range_end = NET_VALUE(tp->at_rtmp_net);
	291
	292	if (ifID->ifRouterState == ROUTER_AROUND) {
	293	if ((ifID->ifThisCableStart == range_start) &&
	294	(ifID->ifThisCableEnd == range_end)) {
	295	trackrouter(ifID,
	296	NET_VALUE(rtmp->at_rtmp_this_net),
	297	rtmp->at_rtmp_id[0]
	298	);
	299	}
	300	} else {
	301	/* There was no router around earlier, one
	302	* probably just came up.
	303	*/
	304	if ((this_net >= DDP_STARTUP_LOW) &&
	305	(this_net <= DDP_STARTUP_HIGH)) {
	306	/* we're operating in the startup range,
	307	* ignore the presence of router
	308	*/
	309	if (ifID->ifRouterState == NO_ROUTER) {
9bccf70c A	310	dPrintf(D_M_RTMP, D_L_INFO, ("rtmp_input: new router came up, INVALID: net \
	311	in startup range.\n"));
	312	/* trackrouter sends a KEV_ATALK_ROUTERUP event to note that
	313	a new router has come up when we had none before. */
1c79356b A	314	trackrouter(ifID,
	315	NET_VALUE(rtmp->at_rtmp_this_net),
	316	rtmp->at_rtmp_id[0]
	317	);
	318	ifID->ifRouterState = ROUTER_WARNING;
9bccf70c A	319
	320	/* This router is invalid. Send event. */
	321	atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP_INVALID, 0, 0);
1c79356b A	322	}
	323	} else {
	324	/* our address
	325	* is not in startup range; Is our
	326	* address good for the cable??
	327	*/
	328	if ((this_net >= range_start) &&
	329	(this_net <= range_end)) {
	330	/* Our address is in the range
	331	* valid for this cable... Note
	332	* the router address and then
	333	* get ZIP rolling to get the
	334	* zone info.
	335	*/
	336	ifID->ifThisCableStart = range_start;
	337	ifID->ifThisCableEnd = range_end;
9bccf70c A	338
	339	/* A seed router that gives us back our cable range came up.
	340	It's a valid router and gives us our network back. */
	341	atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP, 0, 0);
	342
1c79356b A	343	trackrouter(ifID,
	344	NET_VALUE(rtmp->at_rtmp_this_net),
	345	rtmp->at_rtmp_id[0]
	346	);
	347	zip_control(ifID, ZIP_LATE_ROUTER);
	348	} else {
	349	/* Our address is not in the
	350	* range valid for this cable..
	351	* ignore presence of the
	352	* router
	353	*/
	354	if (ifID->ifRouterState == NO_ROUTER) {
9bccf70c A	355	/* trackrouter sends a KEV_ATALK_ROUTERUP event to note that
9bccf70c A	356	a new router has come up when we had none before. */
1c79356b A	357	trackrouter(ifID,
	358	NET_VALUE(rtmp->at_rtmp_this_net),
	359	rtmp->at_rtmp_id[0]
	360	);
	361	ifID->ifRouterState = ROUTER_WARNING;
9bccf70c A	362
	363	/* A new seed router came up, but the cable range is different
	364	than what we had before. */
	365	atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP_INVALID, 0, 0);
1c79356b A	366	}
	367	}
	368	}
	369	}
	370	}
	371
	372	gbuf_freem(mp);
	373	return;
	374	}
	375
	376
	377	void rtmp_init()
	378	{
	379	bzero((caddr_t)trackedrouters, sizeof(struct routerinfo)*NROUTERS2TRAK);
	380	}
	381
	382