rfcomm_socket.c revision 1.21
1 /* $NetBSD: rfcomm_socket.c,v 1.21 2014/07/07 15:13:21 rtr Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Itronix Inc. 5 * All rights reserved. 6 * 7 * Written by Iain Hibbert for Itronix Inc. 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 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: rfcomm_socket.c,v 1.21 2014/07/07 15:13:21 rtr Exp $"); 36 37 /* load symbolic names */ 38 #ifdef BLUETOOTH_DEBUG 39 #define PRUREQUESTS 40 #define PRCOREQUESTS 41 #endif 42 43 #include <sys/param.h> 44 #include <sys/domain.h> 45 #include <sys/kernel.h> 46 #include <sys/mbuf.h> 47 #include <sys/proc.h> 48 #include <sys/protosw.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/systm.h> 52 53 #include <netbt/bluetooth.h> 54 #include <netbt/rfcomm.h> 55 56 /**************************************************************************** 57 * 58 * RFCOMM SOCK_STREAM Sockets - serial line emulation 59 * 60 */ 61 62 static void rfcomm_connecting(void *); 63 static void rfcomm_connected(void *); 64 static void rfcomm_disconnected(void *, int); 65 static void *rfcomm_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 66 static void rfcomm_complete(void *, int); 67 static void rfcomm_linkmode(void *, int); 68 static void rfcomm_input(void *, struct mbuf *); 69 70 static const struct btproto rfcomm_proto = { 71 rfcomm_connecting, 72 rfcomm_connected, 73 rfcomm_disconnected, 74 rfcomm_newconn, 75 rfcomm_complete, 76 rfcomm_linkmode, 77 rfcomm_input, 78 }; 79 80 /* sysctl variables */ 81 int rfcomm_sendspace = 4096; 82 int rfcomm_recvspace = 4096; 83 84 static int 85 rfcomm_attach(struct socket *so, int proto) 86 { 87 int error; 88 89 KASSERT(so->so_pcb == NULL); 90 91 if (so->so_lock == NULL) { 92 mutex_obj_hold(bt_lock); 93 so->so_lock = bt_lock; 94 solock(so); 95 } 96 KASSERT(solocked(so)); 97 98 /* 99 * Since we have nothing to add, we attach the DLC 100 * structure directly to our PCB pointer. 101 */ 102 error = soreserve(so, rfcomm_sendspace, rfcomm_recvspace); 103 if (error) 104 return error; 105 106 error = rfcomm_attach_pcb((struct rfcomm_dlc **)&so->so_pcb, 107 &rfcomm_proto, so); 108 if (error) 109 return error; 110 111 error = rfcomm_rcvd(so->so_pcb, sbspace(&so->so_rcv)); 112 if (error) { 113 rfcomm_detach_pcb((struct rfcomm_dlc **)&so->so_pcb); 114 return error; 115 } 116 return 0; 117 } 118 119 static void 120 rfcomm_detach(struct socket *so) 121 { 122 KASSERT(so->so_pcb != NULL); 123 rfcomm_detach_pcb((struct rfcomm_dlc **)&so->so_pcb); 124 KASSERT(so->so_pcb == NULL); 125 } 126 127 static int 128 rfcomm_ioctl(struct socket *up, u_long cmd, void *nam, struct ifnet *ifp) 129 { 130 return EPASSTHROUGH; 131 } 132 133 static int 134 rfcomm_stat(struct socket *so, struct stat *ub) 135 { 136 return 0; 137 } 138 139 /* 140 * User Request. 141 * up is socket 142 * m is optional mbuf chain containing message 143 * nam is either 144 * optional mbuf chain containing an address 145 * message flags (PRU_RCVD) 146 * ctl is either 147 * optional mbuf chain containing socket options 148 * optional interface pointer PRU_PURGEIF 149 * l is pointer to process requesting action (if any) 150 * 151 * we are responsible for disposing of m and ctl if 152 * they are mbuf chains 153 */ 154 static int 155 rfcomm_usrreq(struct socket *up, int req, struct mbuf *m, 156 struct mbuf *nam, struct mbuf *ctl, struct lwp *l) 157 { 158 struct rfcomm_dlc *pcb = up->so_pcb; 159 struct sockaddr_bt *sa; 160 struct mbuf *m0; 161 int err = 0; 162 163 DPRINTFN(2, "%s\n", prurequests[req]); 164 KASSERT(req != PRU_ATTACH); 165 KASSERT(req != PRU_DETACH); 166 KASSERT(req != PRU_CONTROL); 167 KASSERT(req != PRU_SENSE); 168 169 switch (req) { 170 case PRU_PURGEIF: 171 return EOPNOTSUPP; 172 } 173 if (pcb == NULL) { 174 err = EINVAL; 175 goto release; 176 } 177 178 switch(req) { 179 case PRU_DISCONNECT: 180 soisdisconnecting(up); 181 return rfcomm_disconnect(pcb, up->so_linger); 182 183 case PRU_ABORT: 184 rfcomm_disconnect(pcb, 0); 185 soisdisconnected(up); 186 rfcomm_detach(up); 187 return 0; 188 189 case PRU_BIND: 190 KASSERT(nam != NULL); 191 sa = mtod(nam, struct sockaddr_bt *); 192 193 if (sa->bt_len != sizeof(struct sockaddr_bt)) 194 return EINVAL; 195 196 if (sa->bt_family != AF_BLUETOOTH) 197 return EAFNOSUPPORT; 198 199 return rfcomm_bind(pcb, sa); 200 201 case PRU_CONNECT: 202 KASSERT(nam != NULL); 203 sa = mtod(nam, struct sockaddr_bt *); 204 205 if (sa->bt_len != sizeof(struct sockaddr_bt)) 206 return EINVAL; 207 208 if (sa->bt_family != AF_BLUETOOTH) 209 return EAFNOSUPPORT; 210 211 soisconnecting(up); 212 return rfcomm_connect(pcb, sa); 213 214 case PRU_PEERADDR: 215 KASSERT(nam != NULL); 216 sa = mtod(nam, struct sockaddr_bt *); 217 nam->m_len = sizeof(struct sockaddr_bt); 218 return rfcomm_peeraddr(pcb, sa); 219 220 case PRU_SOCKADDR: 221 KASSERT(nam != NULL); 222 sa = mtod(nam, struct sockaddr_bt *); 223 nam->m_len = sizeof(struct sockaddr_bt); 224 return rfcomm_sockaddr(pcb, sa); 225 226 case PRU_SHUTDOWN: 227 socantsendmore(up); 228 break; 229 230 case PRU_SEND: 231 KASSERT(m != NULL); 232 233 if (ctl) /* no use for that */ 234 m_freem(ctl); 235 236 m0 = m_copypacket(m, M_DONTWAIT); 237 if (m0 == NULL) 238 return ENOMEM; 239 240 sbappendstream(&up->so_snd, m); 241 242 return rfcomm_send(pcb, m0); 243 244 case PRU_RCVD: 245 return rfcomm_rcvd(pcb, sbspace(&up->so_rcv)); 246 247 case PRU_RCVOOB: 248 return EOPNOTSUPP; /* (no release) */ 249 250 case PRU_LISTEN: 251 return rfcomm_listen(pcb); 252 253 case PRU_ACCEPT: 254 KASSERT(nam != NULL); 255 sa = mtod(nam, struct sockaddr_bt *); 256 nam->m_len = sizeof(struct sockaddr_bt); 257 return rfcomm_peeraddr(pcb, sa); 258 259 case PRU_CONNECT2: 260 case PRU_SENDOOB: 261 case PRU_FASTTIMO: 262 case PRU_SLOWTIMO: 263 case PRU_PROTORCV: 264 case PRU_PROTOSEND: 265 err = EOPNOTSUPP; 266 break; 267 268 default: 269 UNKNOWN(req); 270 err = EOPNOTSUPP; 271 break; 272 } 273 274 release: 275 if (m) m_freem(m); 276 if (ctl) m_freem(ctl); 277 return err; 278 } 279 280 /* 281 * rfcomm_ctloutput(req, socket, sockopt) 282 * 283 */ 284 int 285 rfcomm_ctloutput(int req, struct socket *so, struct sockopt *sopt) 286 { 287 struct rfcomm_dlc *pcb = so->so_pcb; 288 int err = 0; 289 290 DPRINTFN(2, "%s\n", prcorequests[req]); 291 292 if (pcb == NULL) 293 return EINVAL; 294 295 if (sopt->sopt_level != BTPROTO_RFCOMM) 296 return ENOPROTOOPT; 297 298 switch(req) { 299 case PRCO_GETOPT: 300 err = rfcomm_getopt(pcb, sopt); 301 break; 302 303 case PRCO_SETOPT: 304 err = rfcomm_setopt(pcb, sopt); 305 break; 306 307 default: 308 err = ENOPROTOOPT; 309 break; 310 } 311 312 return err; 313 } 314 315 /********************************************************************** 316 * 317 * RFCOMM callbacks 318 */ 319 320 static void 321 rfcomm_connecting(void *arg) 322 { 323 /* struct socket *so = arg; */ 324 325 KASSERT(arg != NULL); 326 DPRINTF("Connecting\n"); 327 } 328 329 static void 330 rfcomm_connected(void *arg) 331 { 332 struct socket *so = arg; 333 334 KASSERT(so != NULL); 335 DPRINTF("Connected\n"); 336 soisconnected(so); 337 } 338 339 static void 340 rfcomm_disconnected(void *arg, int err) 341 { 342 struct socket *so = arg; 343 344 KASSERT(so != NULL); 345 DPRINTF("Disconnected\n"); 346 347 so->so_error = err; 348 soisdisconnected(so); 349 } 350 351 static void * 352 rfcomm_newconn(void *arg, struct sockaddr_bt *laddr, 353 struct sockaddr_bt *raddr) 354 { 355 struct socket *so = arg; 356 357 DPRINTF("New Connection\n"); 358 so = sonewconn(so, false); 359 if (so == NULL) 360 return NULL; 361 362 soisconnecting(so); 363 364 return so->so_pcb; 365 } 366 367 /* 368 * rfcomm_complete(rfcomm_dlc, length) 369 * 370 * length bytes are sent and may be removed from socket buffer 371 */ 372 static void 373 rfcomm_complete(void *arg, int length) 374 { 375 struct socket *so = arg; 376 377 sbdrop(&so->so_snd, length); 378 sowwakeup(so); 379 } 380 381 /* 382 * rfcomm_linkmode(rfcomm_dlc, new) 383 * 384 * link mode change notification. 385 */ 386 static void 387 rfcomm_linkmode(void *arg, int new) 388 { 389 struct socket *so = arg; 390 struct sockopt sopt; 391 int mode; 392 393 DPRINTF("auth %s, encrypt %s, secure %s\n", 394 (new & RFCOMM_LM_AUTH ? "on" : "off"), 395 (new & RFCOMM_LM_ENCRYPT ? "on" : "off"), 396 (new & RFCOMM_LM_SECURE ? "on" : "off")); 397 398 sockopt_init(&sopt, BTPROTO_RFCOMM, SO_RFCOMM_LM, 0); 399 (void)rfcomm_getopt(so->so_pcb, &sopt); 400 (void)sockopt_getint(&sopt, &mode); 401 sockopt_destroy(&sopt); 402 403 if (((mode & RFCOMM_LM_AUTH) && !(new & RFCOMM_LM_AUTH)) 404 || ((mode & RFCOMM_LM_ENCRYPT) && !(new & RFCOMM_LM_ENCRYPT)) 405 || ((mode & RFCOMM_LM_SECURE) && !(new & RFCOMM_LM_SECURE))) 406 rfcomm_disconnect(so->so_pcb, 0); 407 } 408 409 /* 410 * rfcomm_input(rfcomm_dlc, mbuf) 411 */ 412 static void 413 rfcomm_input(void *arg, struct mbuf *m) 414 { 415 struct socket *so = arg; 416 417 KASSERT(so != NULL); 418 419 if (m->m_pkthdr.len > sbspace(&so->so_rcv)) { 420 printf("%s: %d bytes dropped (socket buffer full)\n", 421 __func__, m->m_pkthdr.len); 422 m_freem(m); 423 return; 424 } 425 426 DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len); 427 428 sbappendstream(&so->so_rcv, m); 429 sorwakeup(so); 430 } 431 432 PR_WRAP_USRREQS(rfcomm) 433 434 #define rfcomm_attach rfcomm_attach_wrapper 435 #define rfcomm_detach rfcomm_detach_wrapper 436 #define rfcomm_ioctl rfcomm_ioctl_wrapper 437 #define rfcomm_stat rfcomm_stat_wrapper 438 #define rfcomm_usrreq rfcomm_usrreq_wrapper 439 440 const struct pr_usrreqs rfcomm_usrreqs = { 441 .pr_attach = rfcomm_attach, 442 .pr_detach = rfcomm_detach, 443 .pr_ioctl = rfcomm_ioctl, 444 .pr_stat = rfcomm_stat, 445 .pr_generic = rfcomm_usrreq, 446 }; 447
Indexes created Fri Sep 26 08:10:20 GMT 2025