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sco_socket.c revision 1.25 
      1 /*	$NetBSD: sco_socket.c,v 1.25 2014/07/09 14:41:42 rtr Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2006 Itronix Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of Itronix Inc. may not be used to endorse
     16  *    or promote products derived from this software without specific
     17  *    prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
     23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     26  * ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: sco_socket.c,v 1.25 2014/07/09 14:41:42 rtr Exp $");
     34 
     35 /* load symbolic names */
     36 #ifdef BLUETOOTH_DEBUG
     37 #define PRUREQUESTS
     38 #define PRCOREQUESTS
     39 #endif
     40 
     41 #include <sys/param.h>
     42 #include <sys/domain.h>
     43 #include <sys/kernel.h>
     44 #include <sys/mbuf.h>
     45 #include <sys/proc.h>
     46 #include <sys/protosw.h>
     47 #include <sys/socket.h>
     48 #include <sys/socketvar.h>
     49 #include <sys/systm.h>
     50 
     51 #include <netbt/bluetooth.h>
     52 #include <netbt/hci.h>
     53 #include <netbt/sco.h>
     54 
     55 /*******************************************************************************
     56  *
     57  * SCO SOCK_SEQPACKET sockets - low latency audio data
     58  */
     59 
     60 static void sco_connecting(void *);
     61 static void sco_connected(void *);
     62 static void sco_disconnected(void *, int);
     63 static void *sco_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *);
     64 static void sco_complete(void *, int);
     65 static void sco_linkmode(void *, int);
     66 static void sco_input(void *, struct mbuf *);
     67 
     68 static const struct btproto sco_proto = {
     69 	sco_connecting,
     70 	sco_connected,
     71 	sco_disconnected,
     72 	sco_newconn,
     73 	sco_complete,
     74 	sco_linkmode,
     75 	sco_input,
     76 };
     77 
     78 int sco_sendspace = 4096;
     79 int sco_recvspace = 4096;
     80 
     81 static int
     82 sco_attach(struct socket *so, int proto)
     83 {
     84 	int error;
     85 
     86 	KASSERT(so->so_pcb == NULL);
     87 
     88 	if (so->so_lock == NULL) {
     89 		mutex_obj_hold(bt_lock);
     90 		so->so_lock = bt_lock;
     91 		solock(so);
     92 	}
     93 	KASSERT(solocked(so));
     94 
     95 	error = soreserve(so, sco_sendspace, sco_recvspace);
     96 	if (error) {
     97 		return error;
     98 	}
     99 	return sco_attach_pcb((struct sco_pcb **)&so->so_pcb, &sco_proto, so);
    100 }
    101 
    102 static void
    103 sco_detach(struct socket *so)
    104 {
    105 	KASSERT(so->so_pcb != NULL);
    106 	sco_detach_pcb((struct sco_pcb **)&so->so_pcb);
    107 	KASSERT(so->so_pcb == NULL);
    108 }
    109 
    110 static int
    111 sco_accept(struct socket *so, struct mbuf *nam)
    112 {
    113 	struct sco_pcb *pcb = so->so_pcb;
    114 	struct sockaddr_bt *sa;
    115 
    116 	KASSERT(solocked(so));
    117 	KASSERT(nam != NULL);
    118 
    119 	if (pcb == NULL)
    120 		return EINVAL;
    121 
    122 	sa = mtod(nam, struct sockaddr_bt *);
    123 	nam->m_len = sizeof(struct sockaddr_bt);
    124 	return sco_peeraddr_pcb(pcb, sa);
    125 }
    126 
    127 static int
    128 sco_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
    129 {
    130 	return EOPNOTSUPP;
    131 }
    132 
    133 static int
    134 sco_stat(struct socket *so, struct stat *ub)
    135 {
    136 	KASSERT(solocked(so));
    137 
    138 	return 0;
    139 }
    140 
    141 static int
    142 sco_peeraddr(struct socket *so, struct mbuf *nam)
    143 {
    144 	struct sco_pcb *pcb = (struct sco_pcb *)so->so_pcb;
    145 	struct sockaddr_bt *sa;
    146 
    147 	KASSERT(solocked(so));
    148 	KASSERT(pcb != NULL);
    149 	KASSERT(nam != NULL);
    150 
    151 	sa = mtod(nam, struct sockaddr_bt *);
    152 	nam->m_len = sizeof(struct sockaddr_bt);
    153 	return sco_peeraddr_pcb(pcb, sa);
    154 }
    155 
    156 static int
    157 sco_sockaddr(struct socket *so, struct mbuf *nam)
    158 {
    159 	struct sco_pcb *pcb = (struct sco_pcb *)so->so_pcb;
    160 	struct sockaddr_bt *sa;
    161 
    162 	KASSERT(solocked(so));
    163 	KASSERT(pcb != NULL);
    164 	KASSERT(nam != NULL);
    165 
    166 	sa = mtod(nam, struct sockaddr_bt *);
    167 	nam->m_len = sizeof(struct sockaddr_bt);
    168 	return sco_sockaddr_pcb(pcb, sa);
    169 }
    170 
    171 /*
    172  * User Request.
    173  * up is socket
    174  * m is optional mbuf chain containing message
    175  * nam is optional mbuf chain containing an address
    176  * ctl is optional mbuf chain containing socket options
    177  * l is pointer to process requesting action (if any)
    178  *
    179  * we are responsible for disposing of m and ctl if
    180  * they are mbuf chains
    181  */
    182 static int
    183 sco_usrreq(struct socket *up, int req, struct mbuf *m,
    184     struct mbuf *nam, struct mbuf *ctl, struct lwp *l)
    185 {
    186 	struct sco_pcb *pcb = (struct sco_pcb *)up->so_pcb;
    187 	struct sockaddr_bt *sa;
    188 	struct mbuf *m0;
    189 	int err = 0;
    190 
    191 	DPRINTFN(2, "%s\n", prurequests[req]);
    192 	KASSERT(req != PRU_ATTACH);
    193 	KASSERT(req != PRU_DETACH);
    194 	KASSERT(req != PRU_ACCEPT);
    195 	KASSERT(req != PRU_CONTROL);
    196 	KASSERT(req != PRU_SENSE);
    197 	KASSERT(req != PRU_PEERADDR);
    198 	KASSERT(req != PRU_SOCKADDR);
    199 
    200 	switch(req) {
    201 	case PRU_PURGEIF:
    202 		return EOPNOTSUPP;
    203 	}
    204 
    205 	/* anything after here *requires* a pcb */
    206 	if (pcb == NULL) {
    207 		err = EINVAL;
    208 		goto release;
    209 	}
    210 
    211 	switch(req) {
    212 	case PRU_DISCONNECT:
    213 		soisdisconnecting(up);
    214 		return sco_disconnect(pcb, up->so_linger);
    215 
    216 	case PRU_ABORT:
    217 		sco_disconnect(pcb, 0);
    218 		soisdisconnected(up);
    219 		sco_detach(up);
    220 		return 0;
    221 
    222 	case PRU_BIND:
    223 		KASSERT(nam != NULL);
    224 		sa = mtod(nam, struct sockaddr_bt *);
    225 
    226 		if (sa->bt_len != sizeof(struct sockaddr_bt))
    227 			return EINVAL;
    228 
    229 		if (sa->bt_family != AF_BLUETOOTH)
    230 			return EAFNOSUPPORT;
    231 
    232 		return sco_bind(pcb, sa);
    233 
    234 	case PRU_CONNECT:
    235 		KASSERT(nam != NULL);
    236 		sa = mtod(nam, struct sockaddr_bt *);
    237 
    238 		if (sa->bt_len != sizeof(struct sockaddr_bt))
    239 			return EINVAL;
    240 
    241 		if (sa->bt_family != AF_BLUETOOTH)
    242 			return EAFNOSUPPORT;
    243 
    244 		soisconnecting(up);
    245 		return sco_connect(pcb, sa);
    246 
    247 	case PRU_SHUTDOWN:
    248 		socantsendmore(up);
    249 		break;
    250 
    251 	case PRU_SEND:
    252 		KASSERT(m != NULL);
    253 		if (m->m_pkthdr.len == 0)
    254 			break;
    255 
    256 		if (m->m_pkthdr.len > pcb->sp_mtu) {
    257 			err = EMSGSIZE;
    258 			break;
    259 		}
    260 
    261 		m0 = m_copypacket(m, M_DONTWAIT);
    262 		if (m0 == NULL) {
    263 			err = ENOMEM;
    264 			break;
    265 		}
    266 
    267 		if (ctl) /* no use for that */
    268 			m_freem(ctl);
    269 
    270 		sbappendrecord(&up->so_snd, m);
    271 		return sco_send(pcb, m0);
    272 
    273 	case PRU_RCVD:
    274 	case PRU_RCVOOB:
    275 		return EOPNOTSUPP;	/* (no release) */
    276 
    277 	case PRU_LISTEN:
    278 		return sco_listen(pcb);
    279 
    280 	case PRU_CONNECT2:
    281 	case PRU_SENDOOB:
    282 	case PRU_FASTTIMO:
    283 	case PRU_SLOWTIMO:
    284 	case PRU_PROTORCV:
    285 	case PRU_PROTOSEND:
    286 		err = EOPNOTSUPP;
    287 		break;
    288 
    289 	default:
    290 		UNKNOWN(req);
    291 		err = EOPNOTSUPP;
    292 		break;
    293 	}
    294 
    295 release:
    296 	if (m) m_freem(m);
    297 	if (ctl) m_freem(ctl);
    298 	return err;
    299 }
    300 
    301 /*
    302  * get/set socket options
    303  */
    304 int
    305 sco_ctloutput(int req, struct socket *so, struct sockopt *sopt)
    306 {
    307 	struct sco_pcb *pcb = (struct sco_pcb *)so->so_pcb;
    308 	int err = 0;
    309 
    310 	DPRINTFN(2, "req %s\n", prcorequests[req]);
    311 
    312 	if (pcb == NULL)
    313 		return EINVAL;
    314 
    315 	if (sopt->sopt_level != BTPROTO_SCO)
    316 		return ENOPROTOOPT;
    317 
    318 	switch(req) {
    319 	case PRCO_GETOPT:
    320 		err = sco_getopt(pcb, sopt);
    321 		break;
    322 
    323 	case PRCO_SETOPT:
    324 		err = sco_setopt(pcb, sopt);
    325 		break;
    326 
    327 	default:
    328 		err = ENOPROTOOPT;
    329 		break;
    330 	}
    331 
    332 	return err;
    333 }
    334 
    335 /*****************************************************************************
    336  *
    337  *	SCO Protocol socket callbacks
    338  *
    339  */
    340 static void
    341 sco_connecting(void *arg)
    342 {
    343 	struct socket *so = arg;
    344 
    345 	DPRINTF("Connecting\n");
    346 	soisconnecting(so);
    347 }
    348 
    349 static void
    350 sco_connected(void *arg)
    351 {
    352 	struct socket *so = arg;
    353 
    354 	DPRINTF("Connected\n");
    355 	soisconnected(so);
    356 }
    357 
    358 static void
    359 sco_disconnected(void *arg, int err)
    360 {
    361 	struct socket *so = arg;
    362 
    363 	DPRINTF("Disconnected (%d)\n", err);
    364 
    365 	so->so_error = err;
    366 	soisdisconnected(so);
    367 }
    368 
    369 static void *
    370 sco_newconn(void *arg, struct sockaddr_bt *laddr,
    371     struct sockaddr_bt *raddr)
    372 {
    373 	struct socket *so = arg;
    374 
    375 	DPRINTF("New Connection\n");
    376 	so = sonewconn(so, false);
    377 	if (so == NULL)
    378 		return NULL;
    379 
    380 	soisconnecting(so);
    381 	return so->so_pcb;
    382 }
    383 
    384 static void
    385 sco_complete(void *arg, int num)
    386 {
    387 	struct socket *so = arg;
    388 
    389 	while (num-- > 0)
    390 		sbdroprecord(&so->so_snd);
    391 
    392 	sowwakeup(so);
    393 }
    394 
    395 static void
    396 sco_linkmode(void *arg, int mode)
    397 {
    398 }
    399 
    400 static void
    401 sco_input(void *arg, struct mbuf *m)
    402 {
    403 	struct socket *so = arg;
    404 
    405 	/*
    406 	 * since this data is time sensitive, if the buffer
    407 	 * is full we just dump data until the latest one
    408 	 * will fit.
    409 	 */
    410 
    411 	while (m->m_pkthdr.len > sbspace(&so->so_rcv))
    412 		sbdroprecord(&so->so_rcv);
    413 
    414 	DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len);
    415 
    416 	sbappendrecord(&so->so_rcv, m);
    417 	sorwakeup(so);
    418 }
    419 
    420 PR_WRAP_USRREQS(sco)
    421 
    422 #define	sco_attach		sco_attach_wrapper
    423 #define	sco_detach		sco_detach_wrapper
    424 #define	sco_accept		sco_accept_wrapper
    425 #define	sco_ioctl		sco_ioctl_wrapper
    426 #define	sco_stat		sco_stat_wrapper
    427 #define	sco_peeraddr		sco_peeraddr_wrapper
    428 #define	sco_sockaddr		sco_sockaddr_wrapper
    429 #define	sco_usrreq		sco_usrreq_wrapper
    430 
    431 const struct pr_usrreqs sco_usrreqs = {
    432 	.pr_attach	= sco_attach,
    433 	.pr_detach	= sco_detach,
    434 	.pr_accept	= sco_accept,
    435 	.pr_ioctl	= sco_ioctl,
    436 	.pr_stat	= sco_stat,
    437 	.pr_peeraddr	= sco_peeraddr,
    438 	.pr_sockaddr	= sco_sockaddr,
    439 	.pr_generic	= sco_usrreq,
    440 };
    441