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sco_socket.c revision 1.21 
      1 /*	$NetBSD: sco_socket.c,v 1.21 2014/07/07 07:09:58 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 1.21 2014/07/07 07:09:58 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_ioctl(struct socket *up, u_long cmd, void *nam, struct ifnet *ifp)
    112 {
    113 	return EOPNOTSUPP;
    114 }
    115 
    116 static int
    117 sco_stat(struct socket *so, struct stat *ub)
    118 {
    119 	return EOPNOTSUPP;
    120 }
    121 
    122 /*
    123  * User Request.
    124  * up is socket
    125  * m is optional mbuf chain containing message
    126  * nam is optional mbuf chain containing an address
    127  * ctl is optional mbuf chain containing socket options
    128  * l is pointer to process requesting action (if any)
    129  *
    130  * we are responsible for disposing of m and ctl if
    131  * they are mbuf chains
    132  */
    133 static int
    134 sco_usrreq(struct socket *up, int req, struct mbuf *m,
    135     struct mbuf *nam, struct mbuf *ctl, struct lwp *l)
    136 {
    137 	struct sco_pcb *pcb = (struct sco_pcb *)up->so_pcb;
    138 	struct sockaddr_bt *sa;
    139 	struct mbuf *m0;
    140 	int err = 0;
    141 
    142 	DPRINTFN(2, "%s\n", prurequests[req]);
    143 	KASSERT(req != PRU_ATTACH);
    144 	KASSERT(req != PRU_DETACH);
    145 	KASSERT(req != PRU_CONTROL);
    146 	KASSERT(req != PRU_SENSE);
    147 
    148 	switch(req) {
    149 	case PRU_PURGEIF:
    150 		return EOPNOTSUPP;
    151 	}
    152 
    153 	/* anything after here *requires* a pcb */
    154 	if (pcb == NULL) {
    155 		err = EINVAL;
    156 		goto release;
    157 	}
    158 
    159 	switch(req) {
    160 	case PRU_DISCONNECT:
    161 		soisdisconnecting(up);
    162 		return sco_disconnect(pcb, up->so_linger);
    163 
    164 	case PRU_ABORT:
    165 		sco_disconnect(pcb, 0);
    166 		soisdisconnected(up);
    167 		sco_detach(up);
    168 		return 0;
    169 
    170 	case PRU_BIND:
    171 		KASSERT(nam != NULL);
    172 		sa = mtod(nam, struct sockaddr_bt *);
    173 
    174 		if (sa->bt_len != sizeof(struct sockaddr_bt))
    175 			return EINVAL;
    176 
    177 		if (sa->bt_family != AF_BLUETOOTH)
    178 			return EAFNOSUPPORT;
    179 
    180 		return sco_bind(pcb, sa);
    181 
    182 	case PRU_CONNECT:
    183 		KASSERT(nam != NULL);
    184 		sa = mtod(nam, struct sockaddr_bt *);
    185 
    186 		if (sa->bt_len != sizeof(struct sockaddr_bt))
    187 			return EINVAL;
    188 
    189 		if (sa->bt_family != AF_BLUETOOTH)
    190 			return EAFNOSUPPORT;
    191 
    192 		soisconnecting(up);
    193 		return sco_connect(pcb, sa);
    194 
    195 	case PRU_PEERADDR:
    196 		KASSERT(nam != NULL);
    197 		sa = mtod(nam, struct sockaddr_bt *);
    198 		nam->m_len = sizeof(struct sockaddr_bt);
    199 		return sco_peeraddr(pcb, sa);
    200 
    201 	case PRU_SOCKADDR:
    202 		KASSERT(nam != NULL);
    203 		sa = mtod(nam, struct sockaddr_bt *);
    204 		nam->m_len = sizeof(struct sockaddr_bt);
    205 		return sco_sockaddr(pcb, sa);
    206 
    207 	case PRU_SHUTDOWN:
    208 		socantsendmore(up);
    209 		break;
    210 
    211 	case PRU_SEND:
    212 		KASSERT(m != NULL);
    213 		if (m->m_pkthdr.len == 0)
    214 			break;
    215 
    216 		if (m->m_pkthdr.len > pcb->sp_mtu) {
    217 			err = EMSGSIZE;
    218 			break;
    219 		}
    220 
    221 		m0 = m_copypacket(m, M_DONTWAIT);
    222 		if (m0 == NULL) {
    223 			err = ENOMEM;
    224 			break;
    225 		}
    226 
    227 		if (ctl) /* no use for that */
    228 			m_freem(ctl);
    229 
    230 		sbappendrecord(&up->so_snd, m);
    231 		return sco_send(pcb, m0);
    232 
    233 	case PRU_RCVD:
    234 	case PRU_RCVOOB:
    235 		return EOPNOTSUPP;	/* (no release) */
    236 
    237 	case PRU_LISTEN:
    238 		return sco_listen(pcb);
    239 
    240 	case PRU_ACCEPT:
    241 		KASSERT(nam != NULL);
    242 		sa = mtod(nam, struct sockaddr_bt *);
    243 		nam->m_len = sizeof(struct sockaddr_bt);
    244 		return sco_peeraddr(pcb, sa);
    245 
    246 	case PRU_CONNECT2:
    247 	case PRU_SENDOOB:
    248 	case PRU_FASTTIMO:
    249 	case PRU_SLOWTIMO:
    250 	case PRU_PROTORCV:
    251 	case PRU_PROTOSEND:
    252 		err = EOPNOTSUPP;
    253 		break;
    254 
    255 	default:
    256 		UNKNOWN(req);
    257 		err = EOPNOTSUPP;
    258 		break;
    259 	}
    260 
    261 release:
    262 	if (m) m_freem(m);
    263 	if (ctl) m_freem(ctl);
    264 	return err;
    265 }
    266 
    267 /*
    268  * get/set socket options
    269  */
    270 int
    271 sco_ctloutput(int req, struct socket *so, struct sockopt *sopt)
    272 {
    273 	struct sco_pcb *pcb = (struct sco_pcb *)so->so_pcb;
    274 	int err = 0;
    275 
    276 	DPRINTFN(2, "req %s\n", prcorequests[req]);
    277 
    278 	if (pcb == NULL)
    279 		return EINVAL;
    280 
    281 	if (sopt->sopt_level != BTPROTO_SCO)
    282 		return ENOPROTOOPT;
    283 
    284 	switch(req) {
    285 	case PRCO_GETOPT:
    286 		err = sco_getopt(pcb, sopt);
    287 		break;
    288 
    289 	case PRCO_SETOPT:
    290 		err = sco_setopt(pcb, sopt);
    291 		break;
    292 
    293 	default:
    294 		err = ENOPROTOOPT;
    295 		break;
    296 	}
    297 
    298 	return err;
    299 }
    300 
    301 /*****************************************************************************
    302  *
    303  *	SCO Protocol socket callbacks
    304  *
    305  */
    306 static void
    307 sco_connecting(void *arg)
    308 {
    309 	struct socket *so = arg;
    310 
    311 	DPRINTF("Connecting\n");
    312 	soisconnecting(so);
    313 }
    314 
    315 static void
    316 sco_connected(void *arg)
    317 {
    318 	struct socket *so = arg;
    319 
    320 	DPRINTF("Connected\n");
    321 	soisconnected(so);
    322 }
    323 
    324 static void
    325 sco_disconnected(void *arg, int err)
    326 {
    327 	struct socket *so = arg;
    328 
    329 	DPRINTF("Disconnected (%d)\n", err);
    330 
    331 	so->so_error = err;
    332 	soisdisconnected(so);
    333 }
    334 
    335 static void *
    336 sco_newconn(void *arg, struct sockaddr_bt *laddr,
    337     struct sockaddr_bt *raddr)
    338 {
    339 	struct socket *so = arg;
    340 
    341 	DPRINTF("New Connection\n");
    342 	so = sonewconn(so, false);
    343 	if (so == NULL)
    344 		return NULL;
    345 
    346 	soisconnecting(so);
    347 	return so->so_pcb;
    348 }
    349 
    350 static void
    351 sco_complete(void *arg, int num)
    352 {
    353 	struct socket *so = arg;
    354 
    355 	while (num-- > 0)
    356 		sbdroprecord(&so->so_snd);
    357 
    358 	sowwakeup(so);
    359 }
    360 
    361 static void
    362 sco_linkmode(void *arg, int mode)
    363 {
    364 }
    365 
    366 static void
    367 sco_input(void *arg, struct mbuf *m)
    368 {
    369 	struct socket *so = arg;
    370 
    371 	/*
    372 	 * since this data is time sensitive, if the buffer
    373 	 * is full we just dump data until the latest one
    374 	 * will fit.
    375 	 */
    376 
    377 	while (m->m_pkthdr.len > sbspace(&so->so_rcv))
    378 		sbdroprecord(&so->so_rcv);
    379 
    380 	DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len);
    381 
    382 	sbappendrecord(&so->so_rcv, m);
    383 	sorwakeup(so);
    384 }
    385 
    386 PR_WRAP_USRREQS(sco)
    387 
    388 #define	sco_attach		sco_attach_wrapper
    389 #define	sco_detach		sco_detach_wrapper
    390 #define	sco_ioctl		sco_ioctl_wrapper
    391 #define	sco_stat		sco_stat_wrapper
    392 #define	sco_usrreq		sco_usrreq_wrapper
    393 
    394 const struct pr_usrreqs sco_usrreqs = {
    395 	.pr_attach	= sco_attach,
    396 	.pr_detach	= sco_detach,
    397 	.pr_ioctl	= sco_ioctl,
    398 	.pr_stat	= sco_stat,
    399 	.pr_generic	= sco_usrreq,
    400 };
    401