xref: /dragonfly/sys/netbt/l2cap_socket.c (revision 25a2db75) 
1 /* $OpenBSD: l2cap_socket.c,v 1.1 2007/06/01 02:46:11 uwe Exp $ */
2 /* $NetBSD: l2cap_socket.c,v 1.7 2007/04/21 06:15:23 plunky Exp $ */
3 
4 /*-
5  * Copyright (c) 2005 Iain Hibbert.
6  * Copyright (c) 2006 Itronix Inc.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. The name of Itronix Inc. may not be used to endorse
18  *    or promote products derived from this software without specific
19  *    prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
25  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
26  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
28  * ON ANY THEORY OF LIABILITY, WHETHER IN
29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31  * POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 /* load symbolic names */
35 #ifdef BLUETOOTH_DEBUG
36 #define PRUREQUESTS
37 #define PRCOREQUESTS
38 #endif
39 
40 #include <sys/param.h>
41 #include <sys/domain.h>
42 #include <sys/kernel.h>
43 #include <sys/mbuf.h>
44 #include <sys/proc.h>
45 #include <sys/protosw.h>
46 #include <sys/socket.h>
47 #include <sys/socketvar.h>
48 #include <sys/systm.h>
49 
50 #include <sys/msgport2.h>
51 
52 #include <vm/vm_zone.h>
53 
54 #include <netbt/bluetooth.h>
55 #include <netbt/hci.h>		/* XXX for EPASSTHROUGH */
56 #include <netbt/l2cap.h>
57 
58 /*
59  * L2CAP Sockets
60  *
61  *	SOCK_SEQPACKET - normal L2CAP connection
62  *
63  *	SOCK_DGRAM - connectionless L2CAP - XXX not yet
64  */
65 
66 static void l2cap_connecting(void *);
67 static void l2cap_connected(void *);
68 static void l2cap_disconnected(void *, int);
69 static void *l2cap_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *);
70 static void l2cap_complete(void *, int);
71 static void l2cap_linkmode(void *, int);
72 static void l2cap_input(void *, struct mbuf *);
73 
74 static const struct btproto l2cap_proto = {
75 	l2cap_connecting,
76 	l2cap_connected,
77 	l2cap_disconnected,
78 	l2cap_newconn,
79 	l2cap_complete,
80 	l2cap_linkmode,
81 	l2cap_input,
82 };
83 
84 /* sysctl variables */
85 int l2cap_sendspace = 4096;
86 int l2cap_recvspace = 4096;
87 
88 /*
89  * l2cap_ctloutput(request, socket, level, optname, opt)
90  *
91  *	Apply configuration commands to channel. This corresponds to
92  *	"Reconfigure Channel Request" in the L2CAP specification.
93  */
94 void
95 l2cap_ctloutput(netmsg_t msg)
96 {
97 	struct socket *so = msg->ctloutput.base.nm_so;
98 	struct sockopt *sopt = msg->ctloutput.nm_sopt;
99 	struct l2cap_channel *pcb = (struct l2cap_channel *) so->so_pcb;
100 	struct mbuf *m;
101 	int error = 0;
102 
103 #ifdef notyet			/* XXX */
104 	DPRINTFN(2, "%s\n", prcorequests[req]);
105 #endif
106 
107 	if (pcb == NULL) {
108 		error = EINVAL;
109 		goto out;
110 	}
111 
112 	if (sopt->sopt_level != BTPROTO_L2CAP) {
113 		error = ENOPROTOOPT;
114 		goto out;
115 	}
116 
117 	switch(sopt->sopt_dir) {
118 	case PRCO_GETOPT:
119 		m = m_get(M_NOWAIT, MT_DATA);
120 		if (m == NULL) {
121 		    error = ENOMEM;
122 		    break;
123 		}
124 		m->m_len = l2cap_getopt(pcb, sopt->sopt_name, mtod(m, void *));
125 		if (m->m_len == 0) {
126 			m_freem(m);
127 			m = NULL;
128 			error = ENOPROTOOPT;
129 		}
130 		soopt_from_kbuf(sopt, mtod(m, void *), m->m_len);
131 		break;
132 
133 	case PRCO_SETOPT:
134 		error = l2cap_setopt2(pcb, sopt->sopt_name, so, sopt);
135 		break;
136 
137 	default:
138 		error = ENOPROTOOPT;
139 		break;
140 	}
141 out:
142 	lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
143 }
144 
145 /**********************************************************************
146  *
147  *	L2CAP Protocol socket callbacks
148  *
149  */
150 
151 static void
152 l2cap_connecting(void *arg)
153 {
154 	struct socket *so = arg;
155 
156 	DPRINTF("Connecting\n");
157 	soisconnecting(so);
158 }
159 
160 static void
161 l2cap_connected(void *arg)
162 {
163 	struct socket *so = arg;
164 
165 	DPRINTF("Connected\n");
166 	soisconnected(so);
167 }
168 
169 static void
170 l2cap_disconnected(void *arg, int err)
171 {
172 	struct socket *so = arg;
173 
174 	DPRINTF("Disconnected (%d)\n", err);
175 
176 	so->so_error = err;
177 	soisdisconnected(so);
178 }
179 
180 static void *
181 l2cap_newconn(void *arg, struct sockaddr_bt *laddr,
182     struct sockaddr_bt *raddr)
183 {
184 	struct socket *so = arg;
185 
186 	DPRINTF("New Connection\n");
187 	so = sonewconn(so, 0);
188 	if (so == NULL)
189 		return NULL;
190 
191 	soisconnecting(so);
192 
193 	return so->so_pcb;
194 }
195 
196 static void
197 l2cap_complete(void *arg, int count)
198 {
199 	struct socket *so = arg;
200 
201 	while (count-- > 0)
202 		sbdroprecord(&so->so_snd.sb);
203 
204 	sowwakeup(so);
205 }
206 
207 static void
208 l2cap_linkmode(void *arg, int new)
209 {
210 	struct socket *so = arg;
211 	int mode;
212 
213 	DPRINTF("auth %s, encrypt %s, secure %s\n",
214 		(new & L2CAP_LM_AUTH ? "on" : "off"),
215 		(new & L2CAP_LM_ENCRYPT ? "on" : "off"),
216 		(new & L2CAP_LM_SECURE ? "on" : "off"));
217 
218 	(void)l2cap_getopt(so->so_pcb, SO_L2CAP_LM, &mode);
219 	if (((mode & L2CAP_LM_AUTH) && !(new & L2CAP_LM_AUTH))
220 	    || ((mode & L2CAP_LM_ENCRYPT) && !(new & L2CAP_LM_ENCRYPT))
221 	    || ((mode & L2CAP_LM_SECURE) && !(new & L2CAP_LM_SECURE)))
222 		l2cap_disconnect(so->so_pcb, 0);
223 }
224 
225 static void
226 l2cap_input(void *arg, struct mbuf *m)
227 {
228 	struct socket *so = arg;
229 
230 	if (m->m_pkthdr.len > sbspace(&so->so_rcv)) {
231 		kprintf("%s: packet (%d bytes) dropped (socket buffer full)\n",
232 			__func__, m->m_pkthdr.len);
233 		m_freem(m);
234 		return;
235 	}
236 
237 	DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len);
238 
239 	sbappendrecord(&so->so_rcv.sb, m);
240 	sorwakeup(so);
241 }
242 
243 
244 /*
245  * Implementation of usrreqs.
246  */
247 static void
248 l2cap_sdetach(netmsg_t msg)
249 {
250 	struct socket *so = msg->detach.base.nm_so;
251 	int error;
252 
253 	error = l2cap_detach((struct l2cap_channel **)&so->so_pcb);
254 	lwkt_replymsg(&msg->detach.base.lmsg, error);
255 }
256 
257 /*
258  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
259  *	 will sofree() it when we return.
260  */
261 static void
262 l2cap_sabort(netmsg_t msg)
263 {
264 	struct socket *so = msg->abort.base.nm_so;
265 	struct l2cap_channel *pcb = so->so_pcb;
266 
267 	l2cap_disconnect(pcb, 0);
268 	soisdisconnected(so);
269 
270 	l2cap_sdetach(msg);
271 	/* msg invalid now */
272 }
273 
274 static void
275 l2cap_sdisconnect(netmsg_t msg)
276 {
277 	struct socket *so = msg->disconnect.base.nm_so;
278 	struct l2cap_channel *pcb = so->so_pcb;
279 	int error;
280 
281 	soisdisconnecting(so);
282 
283 	error = l2cap_disconnect(pcb, so->so_linger);
284 	lwkt_replymsg(&msg->disconnect.base.lmsg, error);
285 }
286 
287 static void
288 l2cap_scontrol(netmsg_t msg)
289 {
290 	lwkt_replymsg(&msg->control.base.lmsg, EPASSTHROUGH);
291 }
292 
293 static void
294 l2cap_sattach(netmsg_t msg)
295 {
296 	struct socket *so = msg->attach.base.nm_so;
297 	struct l2cap_channel *pcb = so->so_pcb;
298 	int error;
299 
300 	if (pcb != NULL) {
301 		error = EINVAL;
302 		goto out;
303 	}
304 
305 	/*
306 	 * For L2CAP socket PCB we just use an l2cap_channel structure
307 	 * since we have nothing to add..
308 	 */
309 	error = soreserve(so, l2cap_sendspace, l2cap_recvspace, NULL);
310 	if (error == 0) {
311 		error = l2cap_attach((struct l2cap_channel **)&so->so_pcb,
312 				     &l2cap_proto, so);
313 	}
314 out:
315 	lwkt_replymsg(&msg->attach.base.lmsg, error);
316 }
317 
318 static void
319 l2cap_sbind (netmsg_t msg)
320 {
321 	struct socket *so = msg->bind.base.nm_so;
322 	struct sockaddr *nam = msg->bind.nm_nam;
323 	struct l2cap_channel *pcb = so->so_pcb;
324 	struct sockaddr_bt *sa;
325 	int error;
326 
327 	KKASSERT(nam != NULL);
328 	sa = (struct sockaddr_bt *)nam;
329 
330 	if (sa->bt_len != sizeof(struct sockaddr_bt)) {
331 		error = EINVAL;
332 	} else if (sa->bt_family != AF_BLUETOOTH) {
333 		error = EAFNOSUPPORT;
334 	} else {
335 		error = l2cap_bind(pcb, sa);
336 	}
337 	lwkt_replymsg(&msg->bind.base.lmsg, error);
338 }
339 
340 static void
341 l2cap_sconnect(netmsg_t msg)
342 {
343 	struct socket *so = msg->connect.base.nm_so;
344 	struct sockaddr *nam = msg->connect.nm_nam;
345 	struct l2cap_channel *pcb = so->so_pcb;
346 	struct sockaddr_bt *sa;
347 	int error;
348 
349 	KKASSERT(nam != NULL);
350 	sa = (struct sockaddr_bt *)nam;
351 
352 	if (sa->bt_len != sizeof(struct sockaddr_bt)) {
353 		error = EINVAL;
354 	} else if (sa->bt_family != AF_BLUETOOTH) {
355 		error = EAFNOSUPPORT;
356 	} else {
357 		soisconnecting(so);
358 		error = l2cap_connect(pcb, sa);
359 	}
360 	lwkt_replymsg(&msg->connect.base.lmsg, error);
361 }
362 
363 static void
364 l2cap_speeraddr(netmsg_t msg)
365 {
366 	struct socket *so = msg->peeraddr.base.nm_so;
367 	struct sockaddr **nam = msg->peeraddr.nm_nam;
368 	struct l2cap_channel *pcb = so->so_pcb;
369 	struct sockaddr_bt *sa, ssa;
370 	int error;
371 
372 	sa = &ssa;
373 	bzero(sa, sizeof *sa);
374 	sa->bt_len = sizeof(struct sockaddr_bt);
375 	sa->bt_family = AF_BLUETOOTH;
376 	error = l2cap_peeraddr(pcb, sa);
377 	*nam = dup_sockaddr((struct sockaddr *)sa);
378 
379 	lwkt_replymsg(&msg->peeraddr.base.lmsg, error);
380 }
381 
382 static void
383 l2cap_ssockaddr(netmsg_t msg)
384 {
385 	struct socket *so = msg->sockaddr.base.nm_so;
386 	struct sockaddr **nam = msg->sockaddr.nm_nam;
387 	struct l2cap_channel *pcb = so->so_pcb;
388 	struct sockaddr_bt *sa, ssa;
389 	int error;
390 
391 	sa = &ssa;
392 	bzero(sa, sizeof *sa);
393 	sa->bt_len = sizeof(struct sockaddr_bt);
394 	sa->bt_family = AF_BLUETOOTH;
395 	error = l2cap_sockaddr(pcb, sa);
396 	*nam = dup_sockaddr((struct sockaddr *)sa);
397 
398 	lwkt_replymsg(&msg->sockaddr.base.lmsg, error);
399 }
400 
401 static void
402 l2cap_sshutdown(netmsg_t msg)
403 {
404 	struct socket *so = msg->shutdown.base.nm_so;
405 
406 	socantsendmore(so);
407 
408 	lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
409 }
410 
411 static void
412 l2cap_ssend(netmsg_t msg)
413 {
414 	struct socket *so = msg->send.base.nm_so;
415 	struct mbuf *m = msg->send.nm_m;
416 	struct mbuf *control = msg->send.nm_control;
417 	struct l2cap_channel *pcb = so->so_pcb;
418 	struct mbuf *m0;
419 	int error;
420 
421 	KKASSERT(m != NULL);
422 	if (m->m_pkthdr.len == 0) {
423 		error = 0;
424 		goto out;
425 	}
426 
427 	if (m->m_pkthdr.len > pcb->lc_omtu) {
428 		error = EMSGSIZE;
429 		goto out;
430 	}
431 
432 	m0 = m_copym(m, 0, M_COPYALL, MB_DONTWAIT);
433 	if (m0 == NULL) {
434 		error = ENOMEM;
435 		goto out;
436 	}
437 
438 	m0 = m_copym(m, 0, M_COPYALL, MB_DONTWAIT);
439 	if (m0 == NULL) {
440 		error = ENOMEM;
441 		goto out;
442 	}
443 
444 	/* no use for that */
445 	if (control) {
446 		m_freem(control);
447 		control = NULL;
448 	}
449 	sbappendrecord(&so->so_snd.sb, m);
450 	error = l2cap_send(pcb, m0);
451 	m = NULL;
452 out:
453 	if (m)
454 		m_freem(m);
455 	if (control)
456 		m_freem(control);
457 
458 	lwkt_replymsg(&msg->send.base.lmsg, error);
459 }
460 
461 static void
462 l2cap_saccept(netmsg_t msg)
463 {
464 	struct socket *so = msg->accept.base.nm_so;
465 	struct sockaddr **nam = msg->accept.nm_nam;
466 	struct l2cap_channel *pcb = so->so_pcb;
467 	struct sockaddr_bt sa;
468 	int error;
469 
470 	KKASSERT(nam != NULL);
471 
472 	bzero(&sa, sizeof (sa) );
473 	sa.bt_len = sizeof(struct sockaddr_bt);
474 	sa.bt_family = AF_BLUETOOTH;
475 
476 	error = l2cap_peeraddr(pcb, &sa);
477 	*nam = dup_sockaddr((struct sockaddr *)&sa);
478 
479 	lwkt_replymsg(&msg->accept.base.lmsg, error);
480 }
481 
482 static void
483 l2cap_slisten(netmsg_t msg)
484 {
485 	struct socket *so = msg->listen.base.nm_so;
486 	struct l2cap_channel *pcb = so->so_pcb;
487 	int error;
488 
489 	error = l2cap_listen(pcb);
490 	lwkt_replymsg(&msg->accept.base.lmsg, error);
491 }
492 
493 
494 struct pr_usrreqs l2cap_usrreqs = {
495         .pru_abort = l2cap_sabort,
496         .pru_accept = l2cap_saccept,
497         .pru_attach = l2cap_sattach,
498         .pru_bind = l2cap_sbind,
499         .pru_connect = l2cap_sconnect,
500         .pru_connect2 = pr_generic_notsupp,
501         .pru_control = l2cap_scontrol,
502         .pru_detach = l2cap_sdetach,
503         .pru_disconnect = l2cap_sdisconnect,
504         .pru_listen = l2cap_slisten,
505         .pru_peeraddr = l2cap_speeraddr,
506         .pru_rcvd = pr_generic_notsupp,
507         .pru_rcvoob = pr_generic_notsupp,
508         .pru_send = l2cap_ssend,
509         .pru_sense = pru_sense_null,
510         .pru_shutdown = l2cap_sshutdown,
511         .pru_sockaddr = l2cap_ssockaddr,
512         .pru_sosend = sosend,
513         .pru_soreceive = soreceive
514 };
515