[apple/xnu.git] / bsd / netinet / if_atm.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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@
 */
/*      $NetBSD: if_atm.c,v 1.6 1996/10/13 02:03:01 christos Exp $       */

/*
 *
 * Copyright (c) 1996 Charles D. Cranor and Washington University.
 * 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 Charles D. Cranor and 
 *	Washington University.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 * $FreeBSD: src/sys/netinet/if_atm.c,v 1.8 1999/12/07 17:39:06 shin Exp $
 */

/*
 * IP <=> ATM address resolution.
 */

#if defined(INET) || defined(INET6)

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/queue.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/syslog.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <net/if_atm.h>

#include <netinet/in.h>
#include <netinet/if_atm.h>
#include <net/dlil.h>


#if NATM
#include <netnatm/natm.h>
#endif


#define SDL(s) ((struct sockaddr_dl *)s)

/*
 * atm_rtrequest: handle ATM rt request (in support of generic code)
 *   inputs: "req" = request code
 *           "rt" = route entry
 *           "sa" = sockaddr
 */

void
atm_rtrequest(req, rt, sa)
	int req;
	register struct rtentry *rt;
	struct sockaddr *sa;
{
	register struct sockaddr *gate = rt->rt_gateway;
	struct atm_pseudoioctl api;
#if NATM
	struct sockaddr_in *sin;
	struct natmpcb *npcb = NULL;
	struct atm_pseudohdr *aph;
#endif
	static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};

	if (rt->rt_flags & RTF_GATEWAY)   /* link level requests only */
		return;

	switch (req) {

	case RTM_RESOLVE: /* resolve: only happens when cloning */
		printf("atm_rtrequest: RTM_RESOLVE request detected?\n");
		break;

	case RTM_ADD:

		/*
		 * route added by a command (e.g. ifconfig, route, arp...).
		 *
		 * first check to see if this is not a host route, in which
		 * case we are being called via "ifconfig" to set the address.
		 */

		if ((rt->rt_flags & RTF_HOST) == 0) { 
			rt_setgate(rt,rt_key(rt),(struct sockaddr *)&null_sdl);
			gate = rt->rt_gateway;
			SDL(gate)->sdl_type = rt->rt_ifp->if_type;
			SDL(gate)->sdl_index = rt->rt_ifp->if_index;
			break;
		}

		if ((rt->rt_flags & RTF_CLONING) != 0) {
			printf("atm_rtrequest: cloning route detected?\n");
			break;
		}
		if (gate->sa_family != AF_LINK ||
		    gate->sa_len < sizeof(null_sdl)) {
			log(LOG_DEBUG, "atm_rtrequest: bad gateway value");
			break;
		}

#if DIAGNOSTIC
		if (rt->rt_ifp->if_ioctl == NULL) panic("atm null ioctl");
#endif

#if NATM
		/*
		 * let native ATM know we are using this VCI/VPI
		 * (i.e. reserve it)
		 */
		sin = (struct sockaddr_in *) rt_key(rt);
		if (sin->sin_family != AF_INET)
			goto failed;
		aph = (struct atm_pseudohdr *) LLADDR(SDL(gate));
		npcb = npcb_add(NULL, rt->rt_ifp, ATM_PH_VCI(aph), 
						ATM_PH_VPI(aph));
		if (npcb == NULL) 
			goto failed;
		npcb->npcb_flags |= NPCB_IP;
		npcb->ipaddr.s_addr = sin->sin_addr.s_addr;
		/* XXX: move npcb to llinfo when ATM ARP is ready */
		rt->rt_llinfo = (caddr_t) npcb;
		rt->rt_flags |= RTF_LLINFO;
#endif
		/*
		 * let the lower level know this circuit is active
		 */
		bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
		api.rxhand = NULL;
		if (dlil_ioctl(0, rt->rt_ifp, SIOCATMENA, 
							(caddr_t)&api) != 0) {
			printf("atm: couldn't add VC\n");
			goto failed;
		}

		SDL(gate)->sdl_type = rt->rt_ifp->if_type;
		SDL(gate)->sdl_index = rt->rt_ifp->if_index;

		break;

failed:
#if NATM
		if (npcb) {
			npcb_free(npcb, NPCB_DESTROY);
			rt->rt_llinfo = NULL;
			rt->rt_flags &= ~RTF_LLINFO;
		}
#endif
		rtrequest(RTM_DELETE, rt_key(rt), (struct sockaddr *)0,
			rt_mask(rt), 0, (struct rtentry **) 0);
		break;

	case RTM_DELETE:

#if NATM
		/*
		 * tell native ATM we are done with this VC
		 */

		if (rt->rt_flags & RTF_LLINFO) {
			npcb_free((struct natmpcb *)rt->rt_llinfo, 
								NPCB_DESTROY);
			rt->rt_llinfo = NULL;
			rt->rt_flags &= ~RTF_LLINFO;
		}
#endif
		/*
		 * tell the lower layer to disable this circuit
		 */

		bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
		api.rxhand = NULL;
		dlil_ioctl(0, rt->rt_ifp, SIOCATMDIS, 
							(caddr_t)&api);

		break;
	}
}

/*
 * atmresolve:
 *   inputs:
 *     [1] "rt" = the link level route to use (or null if need to look one up)
 *     [2] "m" = mbuf containing the data to be sent
 *     [3] "dst" = sockaddr_in (IP) address of dest.
 *   output:
 *     [4] "desten" = ATM pseudo header which we will fill in VPI/VCI info
 *   return: 
 *     0 == resolve FAILED; note that "m" gets m_freem'd in this case
 *     1 == resolve OK; desten contains result
 *
 *   XXX: will need more work if we wish to support ATMARP in the kernel,
 *   but this is enough for PVCs entered via the "route" command.
 */

int
atmresolve(rt, m, dst, desten)

register struct rtentry *rt;
struct mbuf *m;
register struct sockaddr *dst;
register struct atm_pseudohdr *desten;	/* OUT */

{
	struct sockaddr_dl *sdl;

	if (m->m_flags & (M_BCAST|M_MCAST)) {
		log(LOG_INFO, "atmresolve: BCAST/MCAST packet detected/dumped");
		goto bad;
	}

	if (rt == NULL) {
		rt = RTALLOC1(dst, 0);
		if (rt == NULL) goto bad; /* failed */
		rtunref(rt);	/* don't keep LL references */
		if ((rt->rt_flags & RTF_GATEWAY) != 0 || 
			(rt->rt_flags & RTF_LLINFO) == 0 ||
			/* XXX: are we using LLINFO? */
			rt->rt_gateway->sa_family != AF_LINK) {
				goto bad;
		}
	}

	/*
	 * note that rt_gateway is a sockaddr_dl which contains the 
	 * atm_pseudohdr data structure for this route.   we currently
	 * don't need any rt_llinfo info (but will if we want to support
	 * ATM ARP [c.f. if_ether.c]).
	 */

	sdl = SDL(rt->rt_gateway);

	/*
	 * Check the address family and length is valid, the address
	 * is resolved; otherwise, try to resolve.
	 */


	if (sdl->sdl_family == AF_LINK && sdl->sdl_alen == sizeof(*desten)) {
		bcopy(LLADDR(sdl), desten, sdl->sdl_alen);
		return(1);	/* ok, go for it! */
	}

	/*
	 * we got an entry, but it doesn't have valid link address
	 * info in it (it is prob. the interface route, which has
	 * sdl_alen == 0).    dump packet.  (fall through to "bad").
	 */

bad:
	m_freem(m);
	return(0);
}
#endif /* INET */
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
d7e50217	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
1c79356b	7	*
d7e50217 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
d7e50217 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1c79356b A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/* $NetBSD: if_atm.c,v 1.6 1996/10/13 02:03:01 christos Exp $ */
	26
	27	/*
	28	*
	29	* Copyright (c) 1996 Charles D. Cranor and Washington University.
	30	* All rights reserved.
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions
	34	* are met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright
	38	* notice, this list of conditions and the following disclaimer in the
	39	* documentation and/or other materials provided with the distribution.
	40	* 3. All advertising materials mentioning features or use of this software
	41	* must display the following acknowledgement:
	42	* This product includes software developed by Charles D. Cranor and
	43	* Washington University.
	44	* 4. The name of the author may not be used to endorse or promote products
	45	* derived from this software without specific prior written permission.
	46	*
	47	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	48	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	49	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	50	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	51	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	52	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	53	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	54	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	55	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	56	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
9bccf70c A	57	*
9bccf70c A	58	* $FreeBSD: src/sys/netinet/if_atm.c,v 1.8 1999/12/07 17:39:06 shin Exp $
1c79356b A	59	*/
	60
	61	/*
	62	* IP <=> ATM address resolution.
	63	*/
	64
1c79356b A	65	#if defined(INET) \|\| defined(INET6)
	66
	67	#include <sys/param.h>
	68	#include <sys/systm.h>
	69	#include <sys/queue.h>
	70	#include <sys/mbuf.h>
	71	#include <sys/socket.h>
	72	#include <sys/sockio.h>
	73	#include <sys/syslog.h>
	74
	75	#include <net/if.h>
	76	#include <net/if_dl.h>
	77	#include <net/route.h>
	78	#include <net/if_atm.h>
	79
	80	#include <netinet/in.h>
	81	#include <netinet/if_atm.h>
	82	#include <net/dlil.h>
	83
	84
	85	#if NATM
	86	#include <netnatm/natm.h>
	87	#endif
	88
	89
	90	#define SDL(s) ((struct sockaddr_dl *)s)
	91
	92	/*
	93	* atm_rtrequest: handle ATM rt request (in support of generic code)
	94	* inputs: "req" = request code
	95	* "rt" = route entry
	96	* "sa" = sockaddr
	97	*/
	98
	99	void
	100	atm_rtrequest(req, rt, sa)
	101	int req;
	102	register struct rtentry *rt;
	103	struct sockaddr *sa;
	104	{
	105	register struct sockaddr *gate = rt->rt_gateway;
	106	struct atm_pseudoioctl api;
	107	#if NATM
	108	struct sockaddr_in *sin;
	109	struct natmpcb *npcb = NULL;
	110	struct atm_pseudohdr *aph;
	111	#endif
	112	static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
	113
	114	if (rt->rt_flags & RTF_GATEWAY) /* link level requests only */
	115	return;
	116
	117	switch (req) {
	118
	119	case RTM_RESOLVE: /* resolve: only happens when cloning */
	120	printf("atm_rtrequest: RTM_RESOLVE request detected?\n");
	121	break;
	122
	123	case RTM_ADD:
	124
	125	/*
	126	* route added by a command (e.g. ifconfig, route, arp...).
	127	*
	128	* first check to see if this is not a host route, in which
129	* case we are being called via "ifconfig" to set the address.
130	*/
131
132	if ((rt->rt_flags & RTF_HOST) == 0) {
133	rt_setgate(rt,rt_key(rt),(struct sockaddr *)&null_sdl);
134	gate = rt->rt_gateway;
135	SDL(gate)->sdl_type = rt->rt_ifp->if_type;
136	SDL(gate)->sdl_index = rt->rt_ifp->if_index;
137	break;
138	}
139
140	if ((rt->rt_flags & RTF_CLONING) != 0) {
141	printf("atm_rtrequest: cloning route detected?\n");
142	break;
143	}
144	if (gate->sa_family != AF_LINK \|\|
145	gate->sa_len < sizeof(null_sdl)) {
146	log(LOG_DEBUG, "atm_rtrequest: bad gateway value");
147	break;
148	}
149
150	#if DIAGNOSTIC
151	if (rt->rt_ifp->if_ioctl == NULL) panic("atm null ioctl");
152	#endif
153
154	#if NATM
155	/*
156	* let native ATM know we are using this VCI/VPI
157	* (i.e. reserve it)
158	*/
159	sin = (struct sockaddr_in *) rt_key(rt);
160	if (sin->sin_family != AF_INET)
161	goto failed;
162	aph = (struct atm_pseudohdr *) LLADDR(SDL(gate));
163	npcb = npcb_add(NULL, rt->rt_ifp, ATM_PH_VCI(aph),
164	ATM_PH_VPI(aph));
165	if (npcb == NULL)
166	goto failed;
167	npcb->npcb_flags \|= NPCB_IP;
168	npcb->ipaddr.s_addr = sin->sin_addr.s_addr;
169	/* XXX: move npcb to llinfo when ATM ARP is ready */
170	rt->rt_llinfo = (caddr_t) npcb;
171	rt->rt_flags \|= RTF_LLINFO;
172	#endif
173	/*
174	* let the lower level know this circuit is active
175	*/
176	bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
177	api.rxhand = NULL;
178	if (dlil_ioctl(0, rt->rt_ifp, SIOCATMENA,
179	(caddr_t)&api) != 0) {
180	printf("atm: couldn't add VC\n");
181	goto failed;
182	}
183
184	SDL(gate)->sdl_type = rt->rt_ifp->if_type;
185	SDL(gate)->sdl_index = rt->rt_ifp->if_index;
186
187	break;
188
189	failed:
190	#if NATM
191	if (npcb) {
192	npcb_free(npcb, NPCB_DESTROY);
193	rt->rt_llinfo = NULL;
194	rt->rt_flags &= ~RTF_LLINFO;
195	}
196	#endif
197	rtrequest(RTM_DELETE, rt_key(rt), (struct sockaddr *)0,
198	rt_mask(rt), 0, (struct rtentry **) 0);
199	break;
200
201	case RTM_DELETE:
202
203	#if NATM
204	/*
205	* tell native ATM we are done with this VC
206	*/
207
208	if (rt->rt_flags & RTF_LLINFO) {
209	npcb_free((struct natmpcb *)rt->rt_llinfo,
210	NPCB_DESTROY);
211	rt->rt_llinfo = NULL;
212	rt->rt_flags &= ~RTF_LLINFO;
213	}
214	#endif
215	/*
216	* tell the lower layer to disable this circuit
217	*/
218
219	bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
220	api.rxhand = NULL;
221	dlil_ioctl(0, rt->rt_ifp, SIOCATMDIS,
222	(caddr_t)&api);
223
224	break;
225	}
226	}
227
228	/*
229	* atmresolve:
230	* inputs:
231	* [1] "rt" = the link level route to use (or null if need to look one up)
232	* [2] "m" = mbuf containing the data to be sent
233	* [3] "dst" = sockaddr_in (IP) address of dest.
234	* output:
235	* [4] "desten" = ATM pseudo header which we will fill in VPI/VCI info
236	* return:
237	* 0 == resolve FAILED; note that "m" gets m_freem'd in this case
238	* 1 == resolve OK; desten contains result
239	*
240	* XXX: will need more work if we wish to support ATMARP in the kernel,
241	* but this is enough for PVCs entered via the "route" command.
242	*/
243
244	int
245	atmresolve(rt, m, dst, desten)
246
247	register struct rtentry *rt;
248	struct mbuf *m;
249	register struct sockaddr *dst;
250	register struct atm_pseudohdr desten; / OUT */
251
252	{
253	struct sockaddr_dl *sdl;
254
255	if (m->m_flags & (M_BCAST\|M_MCAST)) {
256	log(LOG_INFO, "atmresolve: BCAST/MCAST packet detected/dumped");
257	goto bad;
258	}
259
260	if (rt == NULL) {
261	rt = RTALLOC1(dst, 0);
262	if (rt == NULL) goto bad; /* failed */
9bccf70c	263	rtunref(rt); /* don't keep LL references */
1c79356b A	264	if ((rt->rt_flags & RTF_GATEWAY) != 0 \|\|
	265	(rt->rt_flags & RTF_LLINFO) == 0 \|\|
	266	/* XXX: are we using LLINFO? */
	267	rt->rt_gateway->sa_family != AF_LINK) {
	268	goto bad;
	269	}
	270	}
	271
	272	/*
	273	* note that rt_gateway is a sockaddr_dl which contains the
	274	* atm_pseudohdr data structure for this route. we currently
	275	* don't need any rt_llinfo info (but will if we want to support
	276	* ATM ARP [c.f. if_ether.c]).
	277	*/
	278
	279	sdl = SDL(rt->rt_gateway);
	280
	281	/*
	282	* Check the address family and length is valid, the address
	283	* is resolved; otherwise, try to resolve.
	284	*/
	285
	286
	287	if (sdl->sdl_family == AF_LINK && sdl->sdl_alen == sizeof(*desten)) {
	288	bcopy(LLADDR(sdl), desten, sdl->sdl_alen);
	289	return(1); /* ok, go for it! */
	290	}
	291
	292	/*
	293	* we got an entry, but it doesn't have valid link address
	294	* info in it (it is prob. the interface route, which has
	295	* sdl_alen == 0). dump packet. (fall through to "bad").
	296	*/
	297
	298	bad:
	299	m_freem(m);
	300	return(0);
	301	}
	302	#endif /* INET */