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sco_socket.c revision 1.19 
      1 /*	$NetBSD: sco_socket.c,v 1.19 2014/07/01 05:49:18 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 1.19 2014/07/01 05:49:18 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 /*
    117  * User Request.
    118  * up is socket
    119  * m is optional mbuf chain containing message
    120  * nam is optional mbuf chain containing an address
    121  * ctl is optional mbuf chain containing socket options
    122  * l is pointer to process requesting action (if any)
    123  *
    124  * we are responsible for disposing of m and ctl if
    125  * they are mbuf chains
    126  */
    127 static int
    128 sco_usrreq(struct socket *up, int req, struct mbuf *m,
    129     struct mbuf *nam, struct mbuf *ctl, struct lwp *l)
    130 {
    131 	struct sco_pcb *pcb = (struct sco_pcb *)up->so_pcb;
    132 	struct sockaddr_bt *sa;
    133 	struct mbuf *m0;
    134 	int err = 0;
    135 
    136 	DPRINTFN(2, "%s\n", prurequests[req]);
    137 	KASSERT(req != PRU_ATTACH);
    138 	KASSERT(req != PRU_DETACH);
    139 	KASSERT(req != PRU_CONTROL);
    140 
    141 	switch(req) {
    142 	case PRU_PURGEIF:
    143 		return EOPNOTSUPP;
    144 	}
    145 
    146 	/* anything after here *requires* a pcb */
    147 	if (pcb == NULL) {
    148 		err = EINVAL;
    149 		goto release;
    150 	}
    151 
    152 	switch(req) {
    153 	case PRU_DISCONNECT:
    154 		soisdisconnecting(up);
    155 		return sco_disconnect(pcb, up->so_linger);
    156 
    157 	case PRU_ABORT:
    158 		sco_disconnect(pcb, 0);
    159 		soisdisconnected(up);
    160 		sco_detach(up);
    161 		return 0;
    162 
    163 	case PRU_BIND:
    164 		KASSERT(nam != NULL);
    165 		sa = mtod(nam, struct sockaddr_bt *);
    166 
    167 		if (sa->bt_len != sizeof(struct sockaddr_bt))
    168 			return EINVAL;
    169 
    170 		if (sa->bt_family != AF_BLUETOOTH)
    171 			return EAFNOSUPPORT;
    172 
    173 		return sco_bind(pcb, sa);
    174 
    175 	case PRU_CONNECT:
    176 		KASSERT(nam != NULL);
    177 		sa = mtod(nam, struct sockaddr_bt *);
    178 
    179 		if (sa->bt_len != sizeof(struct sockaddr_bt))
    180 			return EINVAL;
    181 
    182 		if (sa->bt_family != AF_BLUETOOTH)
    183 			return EAFNOSUPPORT;
    184 
    185 		soisconnecting(up);
    186 		return sco_connect(pcb, sa);
    187 
    188 	case PRU_PEERADDR:
    189 		KASSERT(nam != NULL);
    190 		sa = mtod(nam, struct sockaddr_bt *);
    191 		nam->m_len = sizeof(struct sockaddr_bt);
    192 		return sco_peeraddr(pcb, sa);
    193 
    194 	case PRU_SOCKADDR:
    195 		KASSERT(nam != NULL);
    196 		sa = mtod(nam, struct sockaddr_bt *);
    197 		nam->m_len = sizeof(struct sockaddr_bt);
    198 		return sco_sockaddr(pcb, sa);
    199 
    200 	case PRU_SHUTDOWN:
    201 		socantsendmore(up);
    202 		break;
    203 
    204 	case PRU_SEND:
    205 		KASSERT(m != NULL);
    206 		if (m->m_pkthdr.len == 0)
    207 			break;
    208 
    209 		if (m->m_pkthdr.len > pcb->sp_mtu) {
    210 			err = EMSGSIZE;
    211 			break;
    212 		}
    213 
    214 		m0 = m_copypacket(m, M_DONTWAIT);
    215 		if (m0 == NULL) {
    216 			err = ENOMEM;
    217 			break;
    218 		}
    219 
    220 		if (ctl) /* no use for that */
    221 			m_freem(ctl);
    222 
    223 		sbappendrecord(&up->so_snd, m);
    224 		return sco_send(pcb, m0);
    225 
    226 	case PRU_SENSE:
    227 		return 0;		/* (no sense - Doh!) */
    228 
    229 	case PRU_RCVD:
    230 	case PRU_RCVOOB:
    231 		return EOPNOTSUPP;	/* (no release) */
    232 
    233 	case PRU_LISTEN:
    234 		return sco_listen(pcb);
    235 
    236 	case PRU_ACCEPT:
    237 		KASSERT(nam != NULL);
    238 		sa = mtod(nam, struct sockaddr_bt *);
    239 		nam->m_len = sizeof(struct sockaddr_bt);
    240 		return sco_peeraddr(pcb, sa);
    241 
    242 	case PRU_CONNECT2:
    243 	case PRU_SENDOOB:
    244 	case PRU_FASTTIMO:
    245 	case PRU_SLOWTIMO:
    246 	case PRU_PROTORCV:
    247 	case PRU_PROTOSEND:
    248 		err = EOPNOTSUPP;
    249 		break;
    250 
    251 	default:
    252 		UNKNOWN(req);
    253 		err = EOPNOTSUPP;
    254 		break;
    255 	}
    256 
    257 release:
    258 	if (m) m_freem(m);
    259 	if (ctl) m_freem(ctl);
    260 	return err;
    261 }
    262 
    263 /*
    264  * get/set socket options
    265  */
    266 int
    267 sco_ctloutput(int req, struct socket *so, struct sockopt *sopt)
    268 {
    269 	struct sco_pcb *pcb = (struct sco_pcb *)so->so_pcb;
    270 	int err = 0;
    271 
    272 	DPRINTFN(2, "req %s\n", prcorequests[req]);
    273 
    274 	if (pcb == NULL)
    275 		return EINVAL;
    276 
    277 	if (sopt->sopt_level != BTPROTO_SCO)
    278 		return ENOPROTOOPT;
    279 
    280 	switch(req) {
    281 	case PRCO_GETOPT:
    282 		err = sco_getopt(pcb, sopt);
    283 		break;
    284 
    285 	case PRCO_SETOPT:
    286 		err = sco_setopt(pcb, sopt);
    287 		break;
    288 
    289 	default:
    290 		err = ENOPROTOOPT;
    291 		break;
    292 	}
    293 
    294 	return err;
    295 }
    296 
    297 /*****************************************************************************
    298  *
    299  *	SCO Protocol socket callbacks
    300  *
    301  */
    302 static void
    303 sco_connecting(void *arg)
    304 {
    305 	struct socket *so = arg;
    306 
    307 	DPRINTF("Connecting\n");
    308 	soisconnecting(so);
    309 }
    310 
    311 static void
    312 sco_connected(void *arg)
    313 {
    314 	struct socket *so = arg;
    315 
    316 	DPRINTF("Connected\n");
    317 	soisconnected(so);
    318 }
    319 
    320 static void
    321 sco_disconnected(void *arg, int err)
    322 {
    323 	struct socket *so = arg;
    324 
    325 	DPRINTF("Disconnected (%d)\n", err);
    326 
    327 	so->so_error = err;
    328 	soisdisconnected(so);
    329 }
    330 
    331 static void *
    332 sco_newconn(void *arg, struct sockaddr_bt *laddr,
    333     struct sockaddr_bt *raddr)
    334 {
    335 	struct socket *so = arg;
    336 
    337 	DPRINTF("New Connection\n");
    338 	so = sonewconn(so, false);
    339 	if (so == NULL)
    340 		return NULL;
    341 
    342 	soisconnecting(so);
    343 	return so->so_pcb;
    344 }
    345 
    346 static void
    347 sco_complete(void *arg, int num)
    348 {
    349 	struct socket *so = arg;
    350 
    351 	while (num-- > 0)
    352 		sbdroprecord(&so->so_snd);
    353 
    354 	sowwakeup(so);
    355 }
    356 
    357 static void
    358 sco_linkmode(void *arg, int mode)
    359 {
    360 }
    361 
    362 static void
    363 sco_input(void *arg, struct mbuf *m)
    364 {
    365 	struct socket *so = arg;
    366 
    367 	/*
    368 	 * since this data is time sensitive, if the buffer
    369 	 * is full we just dump data until the latest one
    370 	 * will fit.
    371 	 */
    372 
    373 	while (m->m_pkthdr.len > sbspace(&so->so_rcv))
    374 		sbdroprecord(&so->so_rcv);
    375 
    376 	DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len);
    377 
    378 	sbappendrecord(&so->so_rcv, m);
    379 	sorwakeup(so);
    380 }
    381 
    382 PR_WRAP_USRREQS(sco)
    383 
    384 #define	sco_attach		sco_attach_wrapper
    385 #define	sco_detach		sco_detach_wrapper
    386 #define	sco_ioctl		sco_ioctl_wrapper
    387 #define	sco_usrreq		sco_usrreq_wrapper
    388 
    389 const struct pr_usrreqs sco_usrreqs = {
    390 	.pr_attach	= sco_attach,
    391 	.pr_detach	= sco_detach,
    392 	.pr_ioctl	= sco_ioctl,
    393 	.pr_generic	= sco_usrreq,
    394 };
    395