[apple/xnu.git] / bsd / netinet / if_atm.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@
 */
/*      $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.
 */

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

#include "opt_inet.h"
#include "opt_natm.h"

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