5 /*-
6  * Copyright (c) 1996-1999 Whistle Communications, Inc.
24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
29  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
91 	uint16_t af;		/* address family, -1 = downstream */
97 	uint32_t seqRetries;	/* how many times we've been here throwing out
191 	ng_callout_init(&sc->handle);  in cisco_constructor()
193 	sc->node = node;  in cisco_constructor()
196 	sc->downstream.af = 0xffff;  in cisco_constructor()
197 	sc->inet.af = AF_INET;  in cisco_constructor()
198 	sc->inet6.af = AF_INET6;  in cisco_constructor()
199 	sc->atalk.af = AF_APPLETALK;  in cisco_constructor()
200 	sc->ipx.af = AF_IPX;  in cisco_constructor()
213 		sc->downstream.hook = hook;  in cisco_newhook()
214 		NG_HOOK_SET_PRIVATE(hook, &sc->downstream);  in cisco_newhook()
217 		ng_callout(&sc->handle, node, NULL, (hz * KEEPALIVE_SECS),  in cisco_newhook()
220 		sc->inet.hook = hook;  in cisco_newhook()
221 		NG_HOOK_SET_PRIVATE(hook, &sc->inet);  in cisco_newhook()
223 		sc->inet6.hook = hook;  in cisco_newhook()
224 		NG_HOOK_SET_PRIVATE(hook, &sc->inet6);  in cisco_newhook()
226 		sc->atalk.hook = hook;  in cisco_newhook()
227 		NG_HOOK_SET_PRIVATE(hook, &sc->atalk);  in cisco_newhook()
229 		sc->ipx.hook = hook;  in cisco_newhook()
230 		NG_HOOK_SET_PRIVATE(hook, &sc->ipx);  in cisco_newhook()
250 	switch (msg->header.typecookie) {  in cisco_rcvmsg()
252 		switch (msg->header.cmd) {  in cisco_rcvmsg()
263 			arg = (char *) resp->data;  in cisco_rcvmsg()
267 			  "unacknowledged keepalives: %d", sc->seqRetries);  in cisco_rcvmsg()
268 			resp->header.arglen = pos + 1;  in cisco_rcvmsg()
277 		switch (msg->header.cmd) {  in cisco_rcvmsg()
279 			if ((msg->header.flags & NGF_RESP) == 0) {  in cisco_rcvmsg()
288 				ips = (struct in_addr *) resp->data;  in cisco_rcvmsg()
289 				ips[0] = sc->localip;  in cisco_rcvmsg()
290 				ips[1] = sc->localmask;  in cisco_rcvmsg()
296 			struct in_addr *const ips = (struct in_addr *)msg->data;  in cisco_rcvmsg()
298 			if (msg->header.arglen < 2 * sizeof(*ips)) {  in cisco_rcvmsg()
302 			sc->localip = ips[0];  in cisco_rcvmsg()
303 			sc->localmask = ips[1];  in cisco_rcvmsg()
315 			stat = (struct ng_cisco_stats *)resp->data;  in cisco_rcvmsg()
316 			stat->seqRetries = sc->seqRetries;  in cisco_rcvmsg()
317 			stat->keepAlivePeriod = KEEPALIVE_SECS;  in cisco_rcvmsg()
347 		goto out;  in cisco_rcvdata()
350 	if (pep->af == 0xffff)  in cisco_rcvdata()
353 	/* OK so it came from a protocol, heading out. Prepend general data  in cisco_rcvdata()
359 		goto out;  in cisco_rcvdata()
363 	h->address = CISCO_UNICAST;  in cisco_rcvdata()
364 	h->control = 0;  in cisco_rcvdata()
366 	switch (pep->af) {  in cisco_rcvdata()
368 		h->protocol = htons(ETHERTYPE_IP);  in cisco_rcvdata()
371 		h->protocol = htons(ETHERTYPE_IPV6);  in cisco_rcvdata()
374 		h->protocol = htons(ETHERTYPE_AT);  in cisco_rcvdata()
377 		h->protocol = htons(ETHERTYPE_IPX);  in cisco_rcvdata()
381 		goto out;  in cisco_rcvdata()
385 	NG_FWD_NEW_DATA(error, item,  sc->downstream.hook, m);  in cisco_rcvdata()
388 out:  in cisco_rcvdata()
402 	NG_NODE_UNREF(sc->node);  in cisco_shutdown()
420 		pep->hook = NULL;  in cisco_disconnect()
421 		if (pep->af == 0xffff)  in cisco_disconnect()
423 			ng_uncallout(&sc->handle, NG_HOOK_NODE(hook));  in cisco_disconnect()
449 	if (m->m_pkthdr.len < sizeof(*h)) {  in cisco_input()
451 		goto drop;  in cisco_input()
455 	if (m->m_len >= sizeof(*h))			/* the common case */  in cisco_input()
464 	switch (h->address) {  in cisco_input()
466 		goto drop;  in cisco_input()
470 		switch (ntohs(h->protocol)) {  in cisco_input()
472 			goto drop;  in cisco_input()
479 			if (m->m_pkthdr.len < sizeof(*p)) {  in cisco_input()
481 				goto drop;  in cisco_input()
485 			if (m->m_len >= sizeof(*p))	/* the common case */  in cisco_input()
493 			switch (ntohl(p->type)) {  in cisco_input()
497 				       (long)ntohl(p->type));  in cisco_input()
503 				sc->remote_seq = ntohl(p->par1);  in cisco_input()
504 				if (sc->local_seq == ntohl(p->par2)) {  in cisco_input()
505 					sc->local_seq++;  in cisco_input()
506 					if (sc->seqRetries > 1)  in cisco_input()
508 					sc->seqRetries = 0;  in cisco_input()
517 				if (sc->inet.hook == NULL)  in cisco_input()
524 				    sc->node, msg, sc->inet.hook, 0);  in cisco_input()
533 					    ntohl(sc->localip.s_addr),  in cisco_input()
534 					    ntohl(sc->localmask.s_addr));  in cisco_input()
538 			goto drop;  in cisco_input()
541 			pep = &sc->inet;  in cisco_input()
544 			pep = &sc->inet6;  in cisco_input()
547 			pep = &sc->atalk;  in cisco_input()
550 			pep = &sc->ipx;  in cisco_input()
556 	/* Drop if payload is empty */  in cisco_input()
557 	if (m->m_pkthdr.len == 0) {  in cisco_input()
559 		goto drop;  in cisco_input()
563 	if (pep->hook == NULL)  in cisco_input()
564 		goto drop;  in cisco_input()
565 	NG_FWD_NEW_DATA(error, item, pep->hook, m);  in cisco_input()
568 drop:  in cisco_input()
581 	cisco_send(sc, CISCO_KEEPALIVE_REQ, sc->local_seq, sc->remote_seq);  in cisco_keepalive()
582 	if (sc->seqRetries++ > 1)  in cisco_keepalive()
584 	ng_callout(&sc->handle, node, NULL, (hz * KEEPALIVE_SECS),  in cisco_keepalive()
608 	m->m_pkthdr.len = m->m_len = CISCO_HEADER_LEN + CISCO_PACKET_LEN;  in cisco_send()
609 	m->m_pkthdr.rcvif = 0;  in cisco_send()
612 	h->address = CISCO_MULTICAST;  in cisco_send()
613 	h->control = 0;  in cisco_send()
614 	h->protocol = htons(CISCO_KEEPALIVE);  in cisco_send()
617 	ch->type = htonl(type);  in cisco_send()
618 	ch->par1 = htonl(par1);  in cisco_send()
619 	ch->par2 = htonl(par2);  in cisco_send()
620 	ch->rel = -1;  in cisco_send()
621 	ch->time0 = htons((uint16_t) (t >> 16));  in cisco_send()
622 	ch->time1 = htons((uint16_t) t);  in cisco_send()
624 	NG_SEND_DATA_ONLY(error, sc->downstream.hook, m);  in cisco_send()
637 	if (sc->inet.hook == NULL) /* nothing to notify */  in cisco_notify()
642 		NG_SEND_MSG_HOOK(dummy_error, sc->node, msg, sc->inet.hook, 0);  in cisco_notify()