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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_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. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * 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_OSREFERENCE_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 (ifnet_ioctl(rt->rt_ifpm 0, SIOCATMENA, &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;
		ifnet_ioctl(rt->rt_ifp, 0, SIOCATMDIS, &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	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 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. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/* $NetBSD: if_atm.c,v 1.6 1996/10/13 02:03:01 christos Exp $ */
	29
	30	/*
	31	*
	32	* Copyright (c) 1996 Charles D. Cranor and Washington University.
	33	* All rights reserved.
	34	*
	35	* Redistribution and use in source and binary forms, with or without
	36	* modification, are permitted provided that the following conditions
	37	* are met:
	38	* 1. Redistributions of source code must retain the above copyright
	39	* notice, this list of conditions and the following disclaimer.
	40	* 2. Redistributions in binary form must reproduce the above copyright
	41	* notice, this list of conditions and the following disclaimer in the
	42	* documentation and/or other materials provided with the distribution.
	43	* 3. All advertising materials mentioning features or use of this software
	44	* must display the following acknowledgement:
	45	* This product includes software developed by Charles D. Cranor and
	46	* Washington University.
	47	* 4. The name of the author may not be used to endorse or promote products
	48	* derived from this software without specific prior written permission.
	49	*
	50	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	51	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	52	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	53	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	54	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	55	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	56	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	57	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	58	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	59	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
9bccf70c A	60	*
9bccf70c A	61	* $FreeBSD: src/sys/netinet/if_atm.c,v 1.8 1999/12/07 17:39:06 shin Exp $
1c79356b A	62	*/
	63
	64	/*
	65	* IP <=> ATM address resolution.
	66	*/
	67
1c79356b A	68	#if defined(INET) \|\| defined(INET6)
	69
	70	#include <sys/param.h>
	71	#include <sys/systm.h>
	72	#include <sys/queue.h>
	73	#include <sys/mbuf.h>
	74	#include <sys/socket.h>
	75	#include <sys/sockio.h>
	76	#include <sys/syslog.h>
	77
	78	#include <net/if.h>
	79	#include <net/if_dl.h>
	80	#include <net/route.h>
	81	#include <net/if_atm.h>
	82
	83	#include <netinet/in.h>
	84	#include <netinet/if_atm.h>
	85	#include <net/dlil.h>
	86
	87
	88	#if NATM
	89	#include <netnatm/natm.h>
	90	#endif
	91
	92
	93	#define SDL(s) ((struct sockaddr_dl *)s)
	94
	95	/*
	96	* atm_rtrequest: handle ATM rt request (in support of generic code)
	97	* inputs: "req" = request code
	98	* "rt" = route entry
	99	* "sa" = sockaddr
	100	*/
	101
	102	void
	103	atm_rtrequest(req, rt, sa)
	104	int req;
	105	register struct rtentry *rt;
	106	struct sockaddr *sa;
	107	{
	108	register struct sockaddr *gate = rt->rt_gateway;
	109	struct atm_pseudoioctl api;
	110	#if NATM
	111	struct sockaddr_in *sin;
	112	struct natmpcb *npcb = NULL;
	113	struct atm_pseudohdr *aph;
	114	#endif
	115	static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
	116
	117	if (rt->rt_flags & RTF_GATEWAY) /* link level requests only */
	118	return;
	119
	120	switch (req) {
	121
	122	case RTM_RESOLVE: /* resolve: only happens when cloning */
	123	printf("atm_rtrequest: RTM_RESOLVE request detected?\n");
	124	break;
	125
	126	case RTM_ADD:
	127
	128	/*
	129	* route added by a command (e.g. ifconfig, route, arp...).
	130	*
	131	* first check to see if this is not a host route, in which
132	* case we are being called via "ifconfig" to set the address.
133	*/
134
135	if ((rt->rt_flags & RTF_HOST) == 0) {
136	rt_setgate(rt,rt_key(rt),(struct sockaddr *)&null_sdl);
137	gate = rt->rt_gateway;
138	SDL(gate)->sdl_type = rt->rt_ifp->if_type;
139	SDL(gate)->sdl_index = rt->rt_ifp->if_index;
140	break;
141	}
142
143	if ((rt->rt_flags & RTF_CLONING) != 0) {
144	printf("atm_rtrequest: cloning route detected?\n");
145	break;
146	}
147	if (gate->sa_family != AF_LINK \|\|
148	gate->sa_len < sizeof(null_sdl)) {
149	log(LOG_DEBUG, "atm_rtrequest: bad gateway value");
150	break;
151	}
152
153	#if DIAGNOSTIC
154	if (rt->rt_ifp->if_ioctl == NULL) panic("atm null ioctl");
155	#endif
156
157	#if NATM
158	/*
159	* let native ATM know we are using this VCI/VPI
160	* (i.e. reserve it)
161	*/
162	sin = (struct sockaddr_in *) rt_key(rt);
163	if (sin->sin_family != AF_INET)
164	goto failed;
165	aph = (struct atm_pseudohdr *) LLADDR(SDL(gate));
166	npcb = npcb_add(NULL, rt->rt_ifp, ATM_PH_VCI(aph),
167	ATM_PH_VPI(aph));
168	if (npcb == NULL)
169	goto failed;
170	npcb->npcb_flags \|= NPCB_IP;
171	npcb->ipaddr.s_addr = sin->sin_addr.s_addr;
172	/* XXX: move npcb to llinfo when ATM ARP is ready */
173	rt->rt_llinfo = (caddr_t) npcb;
174	rt->rt_flags \|= RTF_LLINFO;
175	#endif
176	/*
177	* let the lower level know this circuit is active
178	*/
179	bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
180	api.rxhand = NULL;
2d21ac55	181	if (ifnet_ioctl(rt->rt_ifpm 0, SIOCATMENA, &api) != 0) {
1c79356b A	182	printf("atm: couldn't add VC\n");
	183	goto failed;
	184	}
	185
	186	SDL(gate)->sdl_type = rt->rt_ifp->if_type;
	187	SDL(gate)->sdl_index = rt->rt_ifp->if_index;
	188
	189	break;
	190
	191	failed:
	192	#if NATM
	193	if (npcb) {
	194	npcb_free(npcb, NPCB_DESTROY);
	195	rt->rt_llinfo = NULL;
	196	rt->rt_flags &= ~RTF_LLINFO;
	197	}
	198	#endif
	199	rtrequest(RTM_DELETE, rt_key(rt), (struct sockaddr *)0,
	200	rt_mask(rt), 0, (struct rtentry **) 0);
	201	break;
	202
	203	case RTM_DELETE:
	204
	205	#if NATM
	206	/*
	207	* tell native ATM we are done with this VC
	208	*/
	209
	210	if (rt->rt_flags & RTF_LLINFO) {
	211	npcb_free((struct natmpcb *)rt->rt_llinfo,
	212	NPCB_DESTROY);
	213	rt->rt_llinfo = NULL;
	214	rt->rt_flags &= ~RTF_LLINFO;
	215	}
	216	#endif
	217	/*
	218	* tell the lower layer to disable this circuit
	219	*/
	220
	221	bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
	222	api.rxhand = NULL;
2d21ac55	223	ifnet_ioctl(rt->rt_ifp, 0, SIOCATMDIS, &api);
1c79356b A	224
	225	break;
	226	}
	227	}
	228
	229	/*
	230	* atmresolve:
	231	* inputs:
	232	* [1] "rt" = the link level route to use (or null if need to look one up)
	233	* [2] "m" = mbuf containing the data to be sent
	234	* [3] "dst" = sockaddr_in (IP) address of dest.
	235	* output:
	236	* [4] "desten" = ATM pseudo header which we will fill in VPI/VCI info
	237	* return:
	238	* 0 == resolve FAILED; note that "m" gets m_freem'd in this case
	239	* 1 == resolve OK; desten contains result
	240	*
	241	* XXX: will need more work if we wish to support ATMARP in the kernel,
	242	* but this is enough for PVCs entered via the "route" command.
	243	*/
	244
	245	int
	246	atmresolve(rt, m, dst, desten)
	247
	248	register struct rtentry *rt;
	249	struct mbuf *m;
	250	register struct sockaddr *dst;
	251	register struct atm_pseudohdr desten; / OUT */
	252
	253	{
	254	struct sockaddr_dl *sdl;
	255
	256	if (m->m_flags & (M_BCAST\|M_MCAST)) {
	257	log(LOG_INFO, "atmresolve: BCAST/MCAST packet detected/dumped");
	258	goto bad;
	259	}
	260
	261	if (rt == NULL) {
	262	rt = RTALLOC1(dst, 0);
	263	if (rt == NULL) goto bad; /* failed */
9bccf70c	264	rtunref(rt); /* don't keep LL references */
1c79356b A	265	if ((rt->rt_flags & RTF_GATEWAY) != 0 \|\|
	266	(rt->rt_flags & RTF_LLINFO) == 0 \|\|
	267	/* XXX: are we using LLINFO? */
	268	rt->rt_gateway->sa_family != AF_LINK) {
	269	goto bad;
	270	}
	271	}
	272
	273	/*
	274	* note that rt_gateway is a sockaddr_dl which contains the
	275	* atm_pseudohdr data structure for this route. we currently
	276	* don't need any rt_llinfo info (but will if we want to support
	277	* ATM ARP [c.f. if_ether.c]).
	278	*/
	279
	280	sdl = SDL(rt->rt_gateway);
	281
	282	/*
	283	* Check the address family and length is valid, the address
	284	* is resolved; otherwise, try to resolve.
	285	*/
	286
	287
	288	if (sdl->sdl_family == AF_LINK && sdl->sdl_alen == sizeof(*desten)) {
	289	bcopy(LLADDR(sdl), desten, sdl->sdl_alen);
	290	return(1); /* ok, go for it! */
	291	}
	292
	293	/*
	294	* we got an entry, but it doesn't have valid link address
	295	* info in it (it is prob. the interface route, which has
	296	* sdl_alen == 0). dump packet. (fall through to "bad").
	297	*/
	298
	299	bad:
	300	m_freem(m);
	301	return(0);
	302	}
	303	#endif /* INET */