| 1 | /* $NetBSD: l2cap_socket.c,v 1.35 2015/05/02 17:18:03 rtr Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2005 Iain Hibbert. |
| 5 | * Copyright (c) 2006 Itronix Inc. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. The name of Itronix Inc. may not be used to endorse |
| 17 | * or promote products derived from this software without specific |
| 18 | * prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY |
| 24 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 25 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 26 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 27 | * ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 30 | * POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include <sys/cdefs.h> |
| 34 | __KERNEL_RCSID(0, "$NetBSD: l2cap_socket.c,v 1.35 2015/05/02 17:18:03 rtr Exp $" ); |
| 35 | |
| 36 | /* load symbolic names */ |
| 37 | #ifdef BLUETOOTH_DEBUG |
| 38 | #define PRUREQUESTS |
| 39 | #define PRCOREQUESTS |
| 40 | #endif |
| 41 | |
| 42 | #include <sys/param.h> |
| 43 | #include <sys/domain.h> |
| 44 | #include <sys/kernel.h> |
| 45 | #include <sys/mbuf.h> |
| 46 | #include <sys/proc.h> |
| 47 | #include <sys/protosw.h> |
| 48 | #include <sys/socket.h> |
| 49 | #include <sys/socketvar.h> |
| 50 | #include <sys/systm.h> |
| 51 | |
| 52 | #include <netbt/bluetooth.h> |
| 53 | #include <netbt/l2cap.h> |
| 54 | |
| 55 | /* |
| 56 | * L2CAP Sockets |
| 57 | * |
| 58 | * SOCK_SEQPACKET - normal L2CAP connection |
| 59 | * |
| 60 | * SOCK_DGRAM - connectionless L2CAP - XXX not yet |
| 61 | */ |
| 62 | |
| 63 | static void l2cap_connecting(void *); |
| 64 | static void l2cap_connected(void *); |
| 65 | static void l2cap_disconnected(void *, int); |
| 66 | static void *l2cap_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); |
| 67 | static void l2cap_complete(void *, int); |
| 68 | static void l2cap_linkmode(void *, int); |
| 69 | static void l2cap_input(void *, struct mbuf *); |
| 70 | |
| 71 | static const struct btproto l2cap_proto = { |
| 72 | l2cap_connecting, |
| 73 | l2cap_connected, |
| 74 | l2cap_disconnected, |
| 75 | l2cap_newconn, |
| 76 | l2cap_complete, |
| 77 | l2cap_linkmode, |
| 78 | l2cap_input, |
| 79 | }; |
| 80 | |
| 81 | /* sysctl variables */ |
| 82 | int l2cap_sendspace = 4096; |
| 83 | int l2cap_recvspace = 4096; |
| 84 | |
| 85 | static int |
| 86 | l2cap_attach(struct socket *so, int proto) |
| 87 | { |
| 88 | int error; |
| 89 | |
| 90 | KASSERT(so->so_pcb == NULL); |
| 91 | |
| 92 | if (so->so_lock == NULL) { |
| 93 | mutex_obj_hold(bt_lock); |
| 94 | so->so_lock = bt_lock; |
| 95 | solock(so); |
| 96 | } |
| 97 | KASSERT(solocked(so)); |
| 98 | |
| 99 | /* |
| 100 | * For L2CAP socket PCB we just use an l2cap_channel structure |
| 101 | * since we have nothing to add.. |
| 102 | */ |
| 103 | error = soreserve(so, l2cap_sendspace, l2cap_recvspace); |
| 104 | if (error) |
| 105 | return error; |
| 106 | |
| 107 | return l2cap_attach_pcb((struct l2cap_channel **)&so->so_pcb, |
| 108 | &l2cap_proto, so); |
| 109 | } |
| 110 | |
| 111 | static void |
| 112 | l2cap_detach(struct socket *so) |
| 113 | { |
| 114 | KASSERT(so->so_pcb != NULL); |
| 115 | l2cap_detach_pcb((struct l2cap_channel **)&so->so_pcb); |
| 116 | KASSERT(so->so_pcb == NULL); |
| 117 | } |
| 118 | |
| 119 | static int |
| 120 | l2cap_accept(struct socket *so, struct sockaddr *nam) |
| 121 | { |
| 122 | struct l2cap_channel *pcb = so->so_pcb; |
| 123 | |
| 124 | KASSERT(solocked(so)); |
| 125 | KASSERT(nam != NULL); |
| 126 | |
| 127 | if (pcb == NULL) |
| 128 | return EINVAL; |
| 129 | |
| 130 | return l2cap_peeraddr_pcb(pcb, (struct sockaddr_bt *)nam); |
| 131 | } |
| 132 | |
| 133 | static int |
| 134 | l2cap_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) |
| 135 | { |
| 136 | struct l2cap_channel *pcb = so->so_pcb; |
| 137 | struct sockaddr_bt *sa = (struct sockaddr_bt *)nam; |
| 138 | |
| 139 | KASSERT(solocked(so)); |
| 140 | KASSERT(nam != NULL); |
| 141 | |
| 142 | if (pcb == NULL) |
| 143 | return EINVAL; |
| 144 | |
| 145 | if (sa->bt_len != sizeof(struct sockaddr_bt)) |
| 146 | return EINVAL; |
| 147 | |
| 148 | if (sa->bt_family != AF_BLUETOOTH) |
| 149 | return EAFNOSUPPORT; |
| 150 | |
| 151 | return l2cap_bind_pcb(pcb, sa); |
| 152 | } |
| 153 | |
| 154 | static int |
| 155 | l2cap_listen(struct socket *so, struct lwp *l) |
| 156 | { |
| 157 | struct l2cap_channel *pcb = so->so_pcb; |
| 158 | |
| 159 | KASSERT(solocked(so)); |
| 160 | |
| 161 | if (pcb == NULL) |
| 162 | return EINVAL; |
| 163 | |
| 164 | return l2cap_listen_pcb(pcb); |
| 165 | } |
| 166 | |
| 167 | static int |
| 168 | l2cap_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) |
| 169 | { |
| 170 | struct l2cap_channel *pcb = so->so_pcb; |
| 171 | struct sockaddr_bt *sa = (struct sockaddr_bt *)nam; |
| 172 | |
| 173 | KASSERT(solocked(so)); |
| 174 | KASSERT(nam != NULL); |
| 175 | |
| 176 | if (pcb == NULL) |
| 177 | return EINVAL; |
| 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(so); |
| 186 | return l2cap_connect_pcb(pcb, sa); |
| 187 | } |
| 188 | |
| 189 | static int |
| 190 | l2cap_connect2(struct socket *so, struct socket *so2) |
| 191 | { |
| 192 | KASSERT(solocked(so)); |
| 193 | |
| 194 | if (so->so_pcb == NULL) |
| 195 | return EINVAL; |
| 196 | |
| 197 | return EOPNOTSUPP; |
| 198 | } |
| 199 | |
| 200 | static int |
| 201 | l2cap_disconnect(struct socket *so) |
| 202 | { |
| 203 | struct l2cap_channel *pcb = so->so_pcb; |
| 204 | |
| 205 | KASSERT(solocked(so)); |
| 206 | |
| 207 | if (pcb == NULL) |
| 208 | return EINVAL; |
| 209 | |
| 210 | soisdisconnecting(so); |
| 211 | return l2cap_disconnect_pcb(pcb, so->so_linger); |
| 212 | } |
| 213 | |
| 214 | static int |
| 215 | l2cap_shutdown(struct socket *so) |
| 216 | { |
| 217 | KASSERT(solocked(so)); |
| 218 | |
| 219 | socantsendmore(so); |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | static int |
| 224 | l2cap_abort(struct socket *so) |
| 225 | { |
| 226 | struct l2cap_channel *pcb = so->so_pcb; |
| 227 | |
| 228 | KASSERT(solocked(so)); |
| 229 | |
| 230 | if (pcb == NULL) |
| 231 | return EINVAL; |
| 232 | |
| 233 | l2cap_disconnect_pcb(pcb, 0); |
| 234 | soisdisconnected(so); |
| 235 | l2cap_detach(so); |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static int |
| 240 | l2cap_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) |
| 241 | { |
| 242 | return EPASSTHROUGH; |
| 243 | } |
| 244 | |
| 245 | static int |
| 246 | l2cap_stat(struct socket *so, struct stat *ub) |
| 247 | { |
| 248 | KASSERT(solocked(so)); |
| 249 | |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | static int |
| 254 | l2cap_peeraddr(struct socket *so, struct sockaddr *nam) |
| 255 | { |
| 256 | struct l2cap_channel *pcb = so->so_pcb; |
| 257 | |
| 258 | KASSERT(solocked(so)); |
| 259 | KASSERT(pcb != NULL); |
| 260 | KASSERT(nam != NULL); |
| 261 | |
| 262 | return l2cap_peeraddr_pcb(pcb, (struct sockaddr_bt *)nam); |
| 263 | } |
| 264 | |
| 265 | static int |
| 266 | l2cap_sockaddr(struct socket *so, struct sockaddr *nam) |
| 267 | { |
| 268 | struct l2cap_channel *pcb = so->so_pcb; |
| 269 | |
| 270 | KASSERT(solocked(so)); |
| 271 | KASSERT(pcb != NULL); |
| 272 | KASSERT(nam != NULL); |
| 273 | |
| 274 | return l2cap_sockaddr_pcb(pcb, (struct sockaddr_bt *)nam); |
| 275 | } |
| 276 | |
| 277 | static int |
| 278 | l2cap_rcvd(struct socket *so, int flags, struct lwp *l) |
| 279 | { |
| 280 | KASSERT(solocked(so)); |
| 281 | |
| 282 | return EOPNOTSUPP; |
| 283 | } |
| 284 | |
| 285 | static int |
| 286 | l2cap_recvoob(struct socket *so, struct mbuf *m, int flags) |
| 287 | { |
| 288 | KASSERT(solocked(so)); |
| 289 | |
| 290 | return EOPNOTSUPP; |
| 291 | } |
| 292 | |
| 293 | static int |
| 294 | l2cap_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, |
| 295 | struct mbuf *control, struct lwp *l) |
| 296 | { |
| 297 | struct l2cap_channel *pcb = so->so_pcb; |
| 298 | struct mbuf *m0; |
| 299 | int error = 0; |
| 300 | |
| 301 | KASSERT(solocked(so)); |
| 302 | KASSERT(m != NULL); |
| 303 | |
| 304 | if (control) |
| 305 | m_freem(control); |
| 306 | |
| 307 | if (pcb == NULL) { |
| 308 | error = EINVAL; |
| 309 | goto release; |
| 310 | } |
| 311 | |
| 312 | if (m->m_pkthdr.len == 0) |
| 313 | goto release; |
| 314 | |
| 315 | if (m->m_pkthdr.len > pcb->lc_omtu) { |
| 316 | error = EMSGSIZE; |
| 317 | goto release; |
| 318 | } |
| 319 | |
| 320 | m0 = m_copypacket(m, M_DONTWAIT); |
| 321 | if (m0 == NULL) { |
| 322 | error = ENOMEM; |
| 323 | goto release; |
| 324 | } |
| 325 | |
| 326 | sbappendrecord(&so->so_snd, m); |
| 327 | return l2cap_send_pcb(pcb, m0); |
| 328 | |
| 329 | release: |
| 330 | if (m) |
| 331 | m_freem(m); |
| 332 | |
| 333 | return error; |
| 334 | } |
| 335 | |
| 336 | static int |
| 337 | l2cap_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) |
| 338 | { |
| 339 | KASSERT(solocked(so)); |
| 340 | |
| 341 | if (m) |
| 342 | m_freem(m); |
| 343 | if (control) |
| 344 | m_freem(control); |
| 345 | |
| 346 | return EOPNOTSUPP; |
| 347 | } |
| 348 | |
| 349 | static int |
| 350 | l2cap_purgeif(struct socket *so, struct ifnet *ifp) |
| 351 | { |
| 352 | |
| 353 | return EOPNOTSUPP; |
| 354 | } |
| 355 | |
| 356 | /* |
| 357 | * l2cap_ctloutput(req, socket, sockopt) |
| 358 | * |
| 359 | * Apply configuration commands to channel. This corresponds to |
| 360 | * "Reconfigure Channel Request" in the L2CAP specification. |
| 361 | */ |
| 362 | int |
| 363 | l2cap_ctloutput(int req, struct socket *so, struct sockopt *sopt) |
| 364 | { |
| 365 | struct l2cap_channel *pcb = so->so_pcb; |
| 366 | int err = 0; |
| 367 | |
| 368 | DPRINTFN(2, "%s\n" , prcorequests[req]); |
| 369 | |
| 370 | if (pcb == NULL) |
| 371 | return EINVAL; |
| 372 | |
| 373 | if (sopt->sopt_level != BTPROTO_L2CAP) |
| 374 | return ENOPROTOOPT; |
| 375 | |
| 376 | switch(req) { |
| 377 | case PRCO_GETOPT: |
| 378 | err = l2cap_getopt(pcb, sopt); |
| 379 | break; |
| 380 | |
| 381 | case PRCO_SETOPT: |
| 382 | err = l2cap_setopt(pcb, sopt); |
| 383 | break; |
| 384 | |
| 385 | default: |
| 386 | err = ENOPROTOOPT; |
| 387 | break; |
| 388 | } |
| 389 | |
| 390 | return err; |
| 391 | } |
| 392 | |
| 393 | /********************************************************************** |
| 394 | * |
| 395 | * L2CAP Protocol socket callbacks |
| 396 | * |
| 397 | */ |
| 398 | |
| 399 | static void |
| 400 | l2cap_connecting(void *arg) |
| 401 | { |
| 402 | struct socket *so = arg; |
| 403 | |
| 404 | DPRINTF("Connecting\n" ); |
| 405 | soisconnecting(so); |
| 406 | } |
| 407 | |
| 408 | static void |
| 409 | l2cap_connected(void *arg) |
| 410 | { |
| 411 | struct socket *so = arg; |
| 412 | |
| 413 | DPRINTF("Connected\n" ); |
| 414 | soisconnected(so); |
| 415 | } |
| 416 | |
| 417 | static void |
| 418 | l2cap_disconnected(void *arg, int err) |
| 419 | { |
| 420 | struct socket *so = arg; |
| 421 | |
| 422 | DPRINTF("Disconnected (%d)\n" , err); |
| 423 | |
| 424 | so->so_error = err; |
| 425 | soisdisconnected(so); |
| 426 | } |
| 427 | |
| 428 | static void * |
| 429 | l2cap_newconn(void *arg, struct sockaddr_bt *laddr, |
| 430 | struct sockaddr_bt *raddr) |
| 431 | { |
| 432 | struct socket *so = arg; |
| 433 | |
| 434 | DPRINTF("New Connection\n" ); |
| 435 | so = sonewconn(so, false); |
| 436 | if (so == NULL) |
| 437 | return NULL; |
| 438 | |
| 439 | soisconnecting(so); |
| 440 | |
| 441 | return so->so_pcb; |
| 442 | } |
| 443 | |
| 444 | static void |
| 445 | l2cap_complete(void *arg, int count) |
| 446 | { |
| 447 | struct socket *so = arg; |
| 448 | |
| 449 | while (count-- > 0) |
| 450 | sbdroprecord(&so->so_snd); |
| 451 | |
| 452 | sowwakeup(so); |
| 453 | } |
| 454 | |
| 455 | static void |
| 456 | l2cap_linkmode(void *arg, int new) |
| 457 | { |
| 458 | struct socket *so = arg; |
| 459 | struct sockopt sopt; |
| 460 | int mode; |
| 461 | |
| 462 | DPRINTF("auth %s, encrypt %s, secure %s\n" , |
| 463 | (new & L2CAP_LM_AUTH ? "on" : "off" ), |
| 464 | (new & L2CAP_LM_ENCRYPT ? "on" : "off" ), |
| 465 | (new & L2CAP_LM_SECURE ? "on" : "off" )); |
| 466 | |
| 467 | sockopt_init(&sopt, BTPROTO_L2CAP, SO_L2CAP_LM, 0); |
| 468 | (void)l2cap_getopt(so->so_pcb, &sopt); |
| 469 | (void)sockopt_getint(&sopt, &mode); |
| 470 | sockopt_destroy(&sopt); |
| 471 | |
| 472 | if (((mode & L2CAP_LM_AUTH) && !(new & L2CAP_LM_AUTH)) |
| 473 | || ((mode & L2CAP_LM_ENCRYPT) && !(new & L2CAP_LM_ENCRYPT)) |
| 474 | || ((mode & L2CAP_LM_SECURE) && !(new & L2CAP_LM_SECURE))) |
| 475 | l2cap_disconnect_pcb(so->so_pcb, 0); |
| 476 | } |
| 477 | |
| 478 | static void |
| 479 | l2cap_input(void *arg, struct mbuf *m) |
| 480 | { |
| 481 | struct socket *so = arg; |
| 482 | |
| 483 | if (m->m_pkthdr.len > sbspace(&so->so_rcv)) { |
| 484 | printf("%s: packet (%d bytes) dropped (socket buffer full)\n" , |
| 485 | __func__, m->m_pkthdr.len); |
| 486 | m_freem(m); |
| 487 | return; |
| 488 | } |
| 489 | |
| 490 | DPRINTFN(10, "received %d bytes\n" , m->m_pkthdr.len); |
| 491 | |
| 492 | sbappendrecord(&so->so_rcv, m); |
| 493 | sorwakeup(so); |
| 494 | } |
| 495 | |
| 496 | PR_WRAP_USRREQS(l2cap) |
| 497 | |
| 498 | #define l2cap_attach l2cap_attach_wrapper |
| 499 | #define l2cap_detach l2cap_detach_wrapper |
| 500 | #define l2cap_accept l2cap_accept_wrapper |
| 501 | #define l2cap_bind l2cap_bind_wrapper |
| 502 | #define l2cap_listen l2cap_listen_wrapper |
| 503 | #define l2cap_connect l2cap_connect_wrapper |
| 504 | #define l2cap_connect2 l2cap_connect2_wrapper |
| 505 | #define l2cap_disconnect l2cap_disconnect_wrapper |
| 506 | #define l2cap_shutdown l2cap_shutdown_wrapper |
| 507 | #define l2cap_abort l2cap_abort_wrapper |
| 508 | #define l2cap_ioctl l2cap_ioctl_wrapper |
| 509 | #define l2cap_stat l2cap_stat_wrapper |
| 510 | #define l2cap_peeraddr l2cap_peeraddr_wrapper |
| 511 | #define l2cap_sockaddr l2cap_sockaddr_wrapper |
| 512 | #define l2cap_rcvd l2cap_rcvd_wrapper |
| 513 | #define l2cap_recvoob l2cap_recvoob_wrapper |
| 514 | #define l2cap_send l2cap_send_wrapper |
| 515 | #define l2cap_sendoob l2cap_sendoob_wrapper |
| 516 | #define l2cap_purgeif l2cap_purgeif_wrapper |
| 517 | |
| 518 | const struct pr_usrreqs l2cap_usrreqs = { |
| 519 | .pr_attach = l2cap_attach, |
| 520 | .pr_detach = l2cap_detach, |
| 521 | .pr_accept = l2cap_accept, |
| 522 | .pr_bind = l2cap_bind, |
| 523 | .pr_listen = l2cap_listen, |
| 524 | .pr_connect = l2cap_connect, |
| 525 | .pr_connect2 = l2cap_connect2, |
| 526 | .pr_disconnect = l2cap_disconnect, |
| 527 | .pr_shutdown = l2cap_shutdown, |
| 528 | .pr_abort = l2cap_abort, |
| 529 | .pr_ioctl = l2cap_ioctl, |
| 530 | .pr_stat = l2cap_stat, |
| 531 | .pr_peeraddr = l2cap_peeraddr, |
| 532 | .pr_sockaddr = l2cap_sockaddr, |
| 533 | .pr_rcvd = l2cap_rcvd, |
| 534 | .pr_recvoob = l2cap_recvoob, |
| 535 | .pr_send = l2cap_send, |
| 536 | .pr_sendoob = l2cap_sendoob, |
| 537 | .pr_purgeif = l2cap_purgeif, |
| 538 | }; |
| 539 | |