1 /* 2 * ng_btsocket_l2cap.c 3 */ 4 5 /*- 6 * Copyright (c) 2001-2002 Maksim Yevmenkin <m_evmenkin@yahoo.com> 7 * All rights reserved. 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $Id: ng_btsocket_l2cap.c,v 1.16 2003/09/14 23:29:06 max Exp $ 31 * $FreeBSD$ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bitstring.h> 37 #include <sys/domain.h> 38 #include <sys/endian.h> 39 #include <sys/errno.h> 40 #include <sys/filedesc.h> 41 #include <sys/ioccom.h> 42 #include <sys/kernel.h> 43 #include <sys/lock.h> 44 #include <sys/malloc.h> 45 #include <sys/mbuf.h> 46 #include <sys/mutex.h> 47 #include <sys/protosw.h> 48 #include <sys/queue.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/sysctl.h> 52 #include <sys/taskqueue.h> 53 54 #include <net/vnet.h> 55 56 #include <netgraph/ng_message.h> 57 #include <netgraph/netgraph.h> 58 #include <netgraph/bluetooth/include/ng_bluetooth.h> 59 #include <netgraph/bluetooth/include/ng_hci.h> 60 #include <netgraph/bluetooth/include/ng_l2cap.h> 61 #include <netgraph/bluetooth/include/ng_btsocket.h> 62 #include <netgraph/bluetooth/include/ng_btsocket_l2cap.h> 63 64 /* MALLOC define */ 65 #ifdef NG_SEPARATE_MALLOC 66 static MALLOC_DEFINE(M_NETGRAPH_BTSOCKET_L2CAP, "netgraph_btsocks_l2cap", 67 "Netgraph Bluetooth L2CAP sockets"); 68 #else 69 #define M_NETGRAPH_BTSOCKET_L2CAP M_NETGRAPH 70 #endif /* NG_SEPARATE_MALLOC */ 71 72 /* Netgraph node methods */ 73 static ng_constructor_t ng_btsocket_l2cap_node_constructor; 74 static ng_rcvmsg_t ng_btsocket_l2cap_node_rcvmsg; 75 static ng_shutdown_t ng_btsocket_l2cap_node_shutdown; 76 static ng_newhook_t ng_btsocket_l2cap_node_newhook; 77 static ng_connect_t ng_btsocket_l2cap_node_connect; 78 static ng_rcvdata_t ng_btsocket_l2cap_node_rcvdata; 79 static ng_disconnect_t ng_btsocket_l2cap_node_disconnect; 80 81 static void ng_btsocket_l2cap_input (void *, int); 82 static void ng_btsocket_l2cap_rtclean (void *, int); 83 84 /* Netgraph type descriptor */ 85 static struct ng_type typestruct = { 86 .version = NG_ABI_VERSION, 87 .name = NG_BTSOCKET_L2CAP_NODE_TYPE, 88 .constructor = ng_btsocket_l2cap_node_constructor, 89 .rcvmsg = ng_btsocket_l2cap_node_rcvmsg, 90 .shutdown = ng_btsocket_l2cap_node_shutdown, 91 .newhook = ng_btsocket_l2cap_node_newhook, 92 .connect = ng_btsocket_l2cap_node_connect, 93 .rcvdata = ng_btsocket_l2cap_node_rcvdata, 94 .disconnect = ng_btsocket_l2cap_node_disconnect, 95 }; 96 97 /* Globals */ 98 extern int ifqmaxlen; 99 static u_int32_t ng_btsocket_l2cap_debug_level; 100 static node_p ng_btsocket_l2cap_node; 101 static struct ng_bt_itemq ng_btsocket_l2cap_queue; 102 static struct mtx ng_btsocket_l2cap_queue_mtx; 103 static struct task ng_btsocket_l2cap_queue_task; 104 static LIST_HEAD(, ng_btsocket_l2cap_pcb) ng_btsocket_l2cap_sockets; 105 static struct mtx ng_btsocket_l2cap_sockets_mtx; 106 static LIST_HEAD(, ng_btsocket_l2cap_rtentry) ng_btsocket_l2cap_rt; 107 static struct mtx ng_btsocket_l2cap_rt_mtx; 108 static struct task ng_btsocket_l2cap_rt_task; 109 static struct timeval ng_btsocket_l2cap_lasttime; 110 static int ng_btsocket_l2cap_curpps; 111 112 /* Sysctl tree */ 113 SYSCTL_DECL(_net_bluetooth_l2cap_sockets); 114 static SYSCTL_NODE(_net_bluetooth_l2cap_sockets, OID_AUTO, seq, CTLFLAG_RW, 115 0, "Bluetooth SEQPACKET L2CAP sockets family"); 116 SYSCTL_UINT(_net_bluetooth_l2cap_sockets_seq, OID_AUTO, debug_level, 117 CTLFLAG_RW, 118 &ng_btsocket_l2cap_debug_level, NG_BTSOCKET_WARN_LEVEL, 119 "Bluetooth SEQPACKET L2CAP sockets debug level"); 120 SYSCTL_UINT(_net_bluetooth_l2cap_sockets_seq, OID_AUTO, queue_len, 121 CTLFLAG_RD, 122 &ng_btsocket_l2cap_queue.len, 0, 123 "Bluetooth SEQPACKET L2CAP sockets input queue length"); 124 SYSCTL_UINT(_net_bluetooth_l2cap_sockets_seq, OID_AUTO, queue_maxlen, 125 CTLFLAG_RD, 126 &ng_btsocket_l2cap_queue.maxlen, 0, 127 "Bluetooth SEQPACKET L2CAP sockets input queue max. length"); 128 SYSCTL_UINT(_net_bluetooth_l2cap_sockets_seq, OID_AUTO, queue_drops, 129 CTLFLAG_RD, 130 &ng_btsocket_l2cap_queue.drops, 0, 131 "Bluetooth SEQPACKET L2CAP sockets input queue drops"); 132 133 /* Debug */ 134 #define NG_BTSOCKET_L2CAP_INFO \ 135 if (ng_btsocket_l2cap_debug_level >= NG_BTSOCKET_INFO_LEVEL && \ 136 ppsratecheck(&ng_btsocket_l2cap_lasttime, &ng_btsocket_l2cap_curpps, 1)) \ 137 printf 138 139 #define NG_BTSOCKET_L2CAP_WARN \ 140 if (ng_btsocket_l2cap_debug_level >= NG_BTSOCKET_WARN_LEVEL && \ 141 ppsratecheck(&ng_btsocket_l2cap_lasttime, &ng_btsocket_l2cap_curpps, 1)) \ 142 printf 143 144 #define NG_BTSOCKET_L2CAP_ERR \ 145 if (ng_btsocket_l2cap_debug_level >= NG_BTSOCKET_ERR_LEVEL && \ 146 ppsratecheck(&ng_btsocket_l2cap_lasttime, &ng_btsocket_l2cap_curpps, 1)) \ 147 printf 148 149 #define NG_BTSOCKET_L2CAP_ALERT \ 150 if (ng_btsocket_l2cap_debug_level >= NG_BTSOCKET_ALERT_LEVEL && \ 151 ppsratecheck(&ng_btsocket_l2cap_lasttime, &ng_btsocket_l2cap_curpps, 1)) \ 152 printf 153 154 /* 155 * Netgraph message processing routines 156 */ 157 158 static int ng_btsocket_l2cap_process_l2ca_con_req_rsp 159 (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p); 160 static int ng_btsocket_l2cap_process_l2ca_con_rsp_rsp 161 (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p); 162 static int ng_btsocket_l2cap_process_l2ca_con_ind 163 (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p); 164 165 static int ng_btsocket_l2cap_process_l2ca_cfg_req_rsp 166 (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p); 167 static int ng_btsocket_l2cap_process_l2ca_cfg_rsp_rsp 168 (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p); 169 static int ng_btsocket_l2cap_process_l2ca_cfg_ind 170 (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p); 171 172 static int ng_btsocket_l2cap_process_l2ca_discon_rsp 173 (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p); 174 static int ng_btsocket_l2cap_process_l2ca_discon_ind 175 (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p); 176 177 static int ng_btsocket_l2cap_process_l2ca_write_rsp 178 (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p); 179 180 /* 181 * Send L2CA_xxx messages to the lower layer 182 */ 183 184 static int ng_btsocket_l2cap_send_l2ca_con_req 185 (ng_btsocket_l2cap_pcb_p); 186 static int ng_btsocket_l2cap_send_l2ca_con_rsp_req 187 (u_int32_t, ng_btsocket_l2cap_rtentry_p, bdaddr_p, int, int, int); 188 static int ng_btsocket_l2cap_send_l2ca_cfg_req 189 (ng_btsocket_l2cap_pcb_p); 190 static int ng_btsocket_l2cap_send_l2ca_cfg_rsp 191 (ng_btsocket_l2cap_pcb_p); 192 static int ng_btsocket_l2cap_send_l2ca_discon_req 193 (u_int32_t, ng_btsocket_l2cap_pcb_p); 194 195 static int ng_btsocket_l2cap_send2 196 (ng_btsocket_l2cap_pcb_p); 197 198 /* 199 * Timeout processing routines 200 */ 201 202 static void ng_btsocket_l2cap_timeout (ng_btsocket_l2cap_pcb_p); 203 static void ng_btsocket_l2cap_untimeout (ng_btsocket_l2cap_pcb_p); 204 static void ng_btsocket_l2cap_process_timeout (void *); 205 206 /* 207 * Other stuff 208 */ 209 210 static ng_btsocket_l2cap_pcb_p ng_btsocket_l2cap_pcb_by_addr(bdaddr_p, int); 211 static ng_btsocket_l2cap_pcb_p ng_btsocket_l2cap_pcb_by_token(u_int32_t); 212 static ng_btsocket_l2cap_pcb_p ng_btsocket_l2cap_pcb_by_cid (bdaddr_p, int); 213 static int ng_btsocket_l2cap_result2errno(int); 214 215 #define ng_btsocket_l2cap_wakeup_input_task() \ 216 taskqueue_enqueue(taskqueue_swi_giant, &ng_btsocket_l2cap_queue_task) 217 218 #define ng_btsocket_l2cap_wakeup_route_task() \ 219 taskqueue_enqueue(taskqueue_swi_giant, &ng_btsocket_l2cap_rt_task) 220 221 /***************************************************************************** 222 ***************************************************************************** 223 ** Netgraph node interface 224 ***************************************************************************** 225 *****************************************************************************/ 226 227 /* 228 * Netgraph node constructor. Do not allow to create node of this type. 229 */ 230 231 static int 232 ng_btsocket_l2cap_node_constructor(node_p node) 233 { 234 return (EINVAL); 235 } /* ng_btsocket_l2cap_node_constructor */ 236 237 /* 238 * Do local shutdown processing. Let old node go and create new fresh one. 239 */ 240 241 static int 242 ng_btsocket_l2cap_node_shutdown(node_p node) 243 { 244 int error = 0; 245 246 NG_NODE_UNREF(node); 247 248 /* Create new node */ 249 error = ng_make_node_common(&typestruct, &ng_btsocket_l2cap_node); 250 if (error != 0) { 251 NG_BTSOCKET_L2CAP_ALERT( 252 "%s: Could not create Netgraph node, error=%d\n", __func__, error); 253 254 ng_btsocket_l2cap_node = NULL; 255 256 return (error); 257 } 258 259 error = ng_name_node(ng_btsocket_l2cap_node, 260 NG_BTSOCKET_L2CAP_NODE_TYPE); 261 if (error != 0) { 262 NG_BTSOCKET_L2CAP_ALERT( 263 "%s: Could not name Netgraph node, error=%d\n", __func__, error); 264 265 NG_NODE_UNREF(ng_btsocket_l2cap_node); 266 ng_btsocket_l2cap_node = NULL; 267 268 return (error); 269 } 270 271 return (0); 272 } /* ng_btsocket_l2cap_node_shutdown */ 273 274 /* 275 * We allow any hook to be connected to the node. 276 */ 277 278 static int 279 ng_btsocket_l2cap_node_newhook(node_p node, hook_p hook, char const *name) 280 { 281 return (0); 282 } /* ng_btsocket_l2cap_node_newhook */ 283 284 /* 285 * Just say "YEP, that's OK by me!" 286 */ 287 288 static int 289 ng_btsocket_l2cap_node_connect(hook_p hook) 290 { 291 NG_HOOK_SET_PRIVATE(hook, NULL); 292 NG_HOOK_REF(hook); /* Keep extra reference to the hook */ 293 294 #if 0 295 NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook)); 296 NG_HOOK_FORCE_QUEUE(hook); 297 #endif 298 299 return (0); 300 } /* ng_btsocket_l2cap_node_connect */ 301 302 /* 303 * Hook disconnection. Schedule route cleanup task 304 */ 305 306 static int 307 ng_btsocket_l2cap_node_disconnect(hook_p hook) 308 { 309 /* 310 * If hook has private information than we must have this hook in 311 * the routing table and must schedule cleaning for the routing table. 312 * Otherwise hook was connected but we never got "hook_info" message, 313 * so we have never added this hook to the routing table and it save 314 * to just delete it. 315 */ 316 317 if (NG_HOOK_PRIVATE(hook) != NULL) 318 return (ng_btsocket_l2cap_wakeup_route_task()); 319 320 NG_HOOK_UNREF(hook); /* Remove extra reference */ 321 322 return (0); 323 } /* ng_btsocket_l2cap_node_disconnect */ 324 325 /* 326 * Process incoming messages 327 */ 328 329 static int 330 ng_btsocket_l2cap_node_rcvmsg(node_p node, item_p item, hook_p hook) 331 { 332 struct ng_mesg *msg = NGI_MSG(item); /* item still has message */ 333 int error = 0; 334 335 if (msg != NULL && msg->header.typecookie == NGM_L2CAP_COOKIE) { 336 mtx_lock(&ng_btsocket_l2cap_queue_mtx); 337 if (NG_BT_ITEMQ_FULL(&ng_btsocket_l2cap_queue)) { 338 NG_BTSOCKET_L2CAP_ERR( 339 "%s: Input queue is full (msg)\n", __func__); 340 341 NG_BT_ITEMQ_DROP(&ng_btsocket_l2cap_queue); 342 NG_FREE_ITEM(item); 343 error = ENOBUFS; 344 } else { 345 if (hook != NULL) { 346 NG_HOOK_REF(hook); 347 NGI_SET_HOOK(item, hook); 348 } 349 350 NG_BT_ITEMQ_ENQUEUE(&ng_btsocket_l2cap_queue, item); 351 error = ng_btsocket_l2cap_wakeup_input_task(); 352 } 353 mtx_unlock(&ng_btsocket_l2cap_queue_mtx); 354 } else { 355 NG_FREE_ITEM(item); 356 error = EINVAL; 357 } 358 359 return (error); 360 } /* ng_btsocket_l2cap_node_rcvmsg */ 361 362 /* 363 * Receive data on a hook 364 */ 365 366 static int 367 ng_btsocket_l2cap_node_rcvdata(hook_p hook, item_p item) 368 { 369 int error = 0; 370 371 mtx_lock(&ng_btsocket_l2cap_queue_mtx); 372 if (NG_BT_ITEMQ_FULL(&ng_btsocket_l2cap_queue)) { 373 NG_BTSOCKET_L2CAP_ERR( 374 "%s: Input queue is full (data)\n", __func__); 375 376 NG_BT_ITEMQ_DROP(&ng_btsocket_l2cap_queue); 377 NG_FREE_ITEM(item); 378 error = ENOBUFS; 379 } else { 380 NG_HOOK_REF(hook); 381 NGI_SET_HOOK(item, hook); 382 383 NG_BT_ITEMQ_ENQUEUE(&ng_btsocket_l2cap_queue, item); 384 error = ng_btsocket_l2cap_wakeup_input_task(); 385 } 386 mtx_unlock(&ng_btsocket_l2cap_queue_mtx); 387 388 return (error); 389 } /* ng_btsocket_l2cap_node_rcvdata */ 390 391 /* 392 * Process L2CA_Connect respose. Socket layer must have initiated connection, 393 * so we have to have a socket associated with message token. 394 */ 395 396 static int 397 ng_btsocket_l2cap_process_l2ca_con_req_rsp(struct ng_mesg *msg, 398 ng_btsocket_l2cap_rtentry_p rt) 399 { 400 ng_l2cap_l2ca_con_op *op = NULL; 401 ng_btsocket_l2cap_pcb_t *pcb = NULL; 402 int error = 0; 403 404 if (msg->header.arglen != sizeof(*op)) 405 return (EMSGSIZE); 406 407 op = (ng_l2cap_l2ca_con_op *)(msg->data); 408 409 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 410 411 /* Look for the socket with the token */ 412 pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token); 413 if (pcb == NULL) { 414 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 415 return (ENOENT); 416 } 417 418 mtx_lock(&pcb->pcb_mtx); 419 420 NG_BTSOCKET_L2CAP_INFO( 421 "%s: Got L2CA_Connect response, token=%d, src bdaddr=%x:%x:%x:%x:%x:%x, " \ 422 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, status=%d, " \ 423 "state=%d\n", __func__, msg->header.token, 424 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3], 425 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0], 426 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3], 427 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0], 428 pcb->psm, op->lcid, op->result, op->status, 429 pcb->state); 430 431 if (pcb->state != NG_BTSOCKET_L2CAP_CONNECTING) { 432 mtx_unlock(&pcb->pcb_mtx); 433 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 434 435 return (ENOENT); 436 } 437 438 ng_btsocket_l2cap_untimeout(pcb); 439 440 if (op->result == NG_L2CAP_PENDING) { 441 ng_btsocket_l2cap_timeout(pcb); 442 mtx_unlock(&pcb->pcb_mtx); 443 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 444 445 return (0); 446 } 447 448 if (op->result == NG_L2CAP_SUCCESS) { 449 /* 450 * Channel is now open, so update local channel ID and 451 * start configuration process. Source and destination 452 * addresses as well as route must be already set. 453 */ 454 455 pcb->cid = op->lcid; 456 457 error = ng_btsocket_l2cap_send_l2ca_cfg_req(pcb); 458 if (error != 0) { 459 /* Send disconnect request with "zero" token */ 460 ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb); 461 462 /* ... and close the socket */ 463 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 464 soisdisconnected(pcb->so); 465 } else { 466 pcb->cfg_state = NG_BTSOCKET_L2CAP_CFG_IN_SENT; 467 pcb->state = NG_BTSOCKET_L2CAP_CONFIGURING; 468 469 ng_btsocket_l2cap_timeout(pcb); 470 } 471 } else { 472 /* 473 * We have failed to open connection, so convert result 474 * code to "errno" code and disconnect the socket. Channel 475 * already has been closed. 476 */ 477 478 pcb->so->so_error = ng_btsocket_l2cap_result2errno(op->result); 479 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 480 soisdisconnected(pcb->so); 481 } 482 483 mtx_unlock(&pcb->pcb_mtx); 484 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 485 486 return (error); 487 } /* ng_btsocket_l2cap_process_l2ca_con_req_rsp */ 488 489 /* 490 * Process L2CA_ConnectRsp response 491 */ 492 493 static int 494 ng_btsocket_l2cap_process_l2ca_con_rsp_rsp(struct ng_mesg *msg, 495 ng_btsocket_l2cap_rtentry_p rt) 496 { 497 ng_l2cap_l2ca_con_rsp_op *op = NULL; 498 ng_btsocket_l2cap_pcb_t *pcb = NULL; 499 500 if (msg->header.arglen != sizeof(*op)) 501 return (EMSGSIZE); 502 503 op = (ng_l2cap_l2ca_con_rsp_op *)(msg->data); 504 505 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 506 507 /* Look for the socket with the token */ 508 pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token); 509 if (pcb == NULL) { 510 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 511 return (ENOENT); 512 } 513 514 mtx_lock(&pcb->pcb_mtx); 515 516 NG_BTSOCKET_L2CAP_INFO( 517 "%s: Got L2CA_ConnectRsp response, token=%d, src bdaddr=%x:%x:%x:%x:%x:%x, " \ 518 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, state=%d\n", 519 __func__, msg->header.token, 520 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3], 521 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0], 522 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3], 523 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0], 524 pcb->psm, pcb->cid, op->result, pcb->state); 525 526 if (pcb->state != NG_BTSOCKET_L2CAP_CONNECTING) { 527 mtx_unlock(&pcb->pcb_mtx); 528 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 529 530 return (ENOENT); 531 } 532 533 ng_btsocket_l2cap_untimeout(pcb); 534 535 /* Check the result and disconnect the socket on failure */ 536 if (op->result != NG_L2CAP_SUCCESS) { 537 /* Close the socket - channel already closed */ 538 pcb->so->so_error = ng_btsocket_l2cap_result2errno(op->result); 539 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 540 soisdisconnected(pcb->so); 541 } else { 542 /* Move to CONFIGURING state and wait for CONFIG_IND */ 543 pcb->cfg_state = 0; 544 pcb->state = NG_BTSOCKET_L2CAP_CONFIGURING; 545 ng_btsocket_l2cap_timeout(pcb); 546 } 547 548 mtx_unlock(&pcb->pcb_mtx); 549 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 550 551 return (0); 552 } /* ng_btsocket_process_l2ca_con_rsp_rsp */ 553 554 /* 555 * Process L2CA_Connect indicator. Find socket that listens on address 556 * and PSM. Find exact or closest match. Create new socket and initiate 557 * connection. 558 */ 559 560 static int 561 ng_btsocket_l2cap_process_l2ca_con_ind(struct ng_mesg *msg, 562 ng_btsocket_l2cap_rtentry_p rt) 563 { 564 ng_l2cap_l2ca_con_ind_ip *ip = NULL; 565 ng_btsocket_l2cap_pcb_t *pcb = NULL, *pcb1 = NULL; 566 int error = 0; 567 u_int32_t token = 0; 568 u_int16_t result = 0; 569 570 if (msg->header.arglen != sizeof(*ip)) 571 return (EMSGSIZE); 572 573 ip = (ng_l2cap_l2ca_con_ind_ip *)(msg->data); 574 575 NG_BTSOCKET_L2CAP_INFO( 576 "%s: Got L2CA_Connect indicator, src bdaddr=%x:%x:%x:%x:%x:%x, " \ 577 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, ident=%d\n", 578 __func__, 579 rt->src.b[5], rt->src.b[4], rt->src.b[3], 580 rt->src.b[2], rt->src.b[1], rt->src.b[0], 581 ip->bdaddr.b[5], ip->bdaddr.b[4], ip->bdaddr.b[3], 582 ip->bdaddr.b[2], ip->bdaddr.b[1], ip->bdaddr.b[0], 583 ip->psm, ip->lcid, ip->ident); 584 585 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 586 587 pcb = ng_btsocket_l2cap_pcb_by_addr(&rt->src, ip->psm); 588 if (pcb != NULL) { 589 struct socket *so1 = NULL; 590 591 mtx_lock(&pcb->pcb_mtx); 592 593 /* 594 * First check the pending connections queue and if we have 595 * space then create new socket and set proper source address. 596 */ 597 598 if (pcb->so->so_qlen <= pcb->so->so_qlimit) { 599 CURVNET_SET(pcb->so->so_vnet); 600 so1 = sonewconn(pcb->so, 0); 601 CURVNET_RESTORE(); 602 } 603 604 if (so1 == NULL) { 605 result = NG_L2CAP_NO_RESOURCES; 606 goto respond; 607 } 608 609 /* 610 * If we got here than we have created new socket. So complete 611 * connection. If we we listening on specific address then copy 612 * source address from listening socket, otherwise copy source 613 * address from hook's routing information. 614 */ 615 616 pcb1 = so2l2cap_pcb(so1); 617 KASSERT((pcb1 != NULL), 618 ("%s: pcb1 == NULL\n", __func__)); 619 620 mtx_lock(&pcb1->pcb_mtx); 621 622 if (bcmp(&pcb->src, NG_HCI_BDADDR_ANY, sizeof(pcb->src)) != 0) 623 bcopy(&pcb->src, &pcb1->src, sizeof(pcb1->src)); 624 else 625 bcopy(&rt->src, &pcb1->src, sizeof(pcb1->src)); 626 627 pcb1->flags &= ~NG_BTSOCKET_L2CAP_CLIENT; 628 629 bcopy(&ip->bdaddr, &pcb1->dst, sizeof(pcb1->dst)); 630 pcb1->psm = ip->psm; 631 pcb1->cid = ip->lcid; 632 pcb1->rt = rt; 633 634 /* Copy socket settings */ 635 pcb1->imtu = pcb->imtu; 636 bcopy(&pcb->oflow, &pcb1->oflow, sizeof(pcb1->oflow)); 637 pcb1->flush_timo = pcb->flush_timo; 638 639 token = pcb1->token; 640 } else 641 /* Nobody listens on requested BDADDR/PSM */ 642 result = NG_L2CAP_PSM_NOT_SUPPORTED; 643 644 respond: 645 error = ng_btsocket_l2cap_send_l2ca_con_rsp_req(token, rt, 646 &ip->bdaddr, ip->ident, ip->lcid, result); 647 if (pcb1 != NULL) { 648 if (error != 0) { 649 pcb1->so->so_error = error; 650 pcb1->state = NG_BTSOCKET_L2CAP_CLOSED; 651 soisdisconnected(pcb1->so); 652 } else { 653 pcb1->state = NG_BTSOCKET_L2CAP_CONNECTING; 654 soisconnecting(pcb1->so); 655 656 ng_btsocket_l2cap_timeout(pcb1); 657 } 658 659 mtx_unlock(&pcb1->pcb_mtx); 660 } 661 662 if (pcb != NULL) 663 mtx_unlock(&pcb->pcb_mtx); 664 665 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 666 667 return (error); 668 } /* ng_btsocket_l2cap_process_l2ca_con_ind */ 669 670 /* 671 * Process L2CA_Config response 672 */ 673 674 static int 675 ng_btsocket_l2cap_process_l2ca_cfg_req_rsp(struct ng_mesg *msg, 676 ng_btsocket_l2cap_rtentry_p rt) 677 { 678 ng_l2cap_l2ca_cfg_op *op = NULL; 679 ng_btsocket_l2cap_pcb_p pcb = NULL; 680 681 if (msg->header.arglen != sizeof(*op)) 682 return (EMSGSIZE); 683 684 op = (ng_l2cap_l2ca_cfg_op *)(msg->data); 685 686 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 687 688 /* 689 * Socket must have issued a Configure request, so we must have a 690 * socket that wants to be configured. Use Netgraph message token 691 * to find it 692 */ 693 694 pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token); 695 if (pcb == NULL) { 696 /* 697 * XXX FIXME what to do here? We could not find a 698 * socket with requested token. We even can not send 699 * Disconnect, because we do not know channel ID 700 */ 701 702 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 703 return (ENOENT); 704 } 705 706 mtx_lock(&pcb->pcb_mtx); 707 708 NG_BTSOCKET_L2CAP_INFO( 709 "%s: Got L2CA_Config response, token=%d, src bdaddr=%x:%x:%x:%x:%x:%x, " \ 710 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, state=%d, " \ 711 "cfg_state=%x\n", 712 __func__, msg->header.token, 713 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3], 714 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0], 715 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3], 716 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0], 717 pcb->psm, pcb->cid, op->result, pcb->state, pcb->cfg_state); 718 719 if (pcb->state != NG_BTSOCKET_L2CAP_CONFIGURING) { 720 mtx_unlock(&pcb->pcb_mtx); 721 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 722 723 return (ENOENT); 724 } 725 726 if (op->result == NG_L2CAP_SUCCESS) { 727 /* 728 * XXX FIXME Actually set flush and link timeout. 729 * Set QoS here if required. Resolve conficts (flush_timo). 730 * Save incoming MTU (peer's outgoing MTU) and outgoing flow 731 * spec. 732 */ 733 734 pcb->imtu = op->imtu; 735 bcopy(&op->oflow, &pcb->oflow, sizeof(pcb->oflow)); 736 pcb->flush_timo = op->flush_timo; 737 738 /* 739 * We have configured incoming side, so record it and check 740 * if configuration is complete. If complete then mark socket 741 * as connected, otherwise wait for the peer. 742 */ 743 744 pcb->cfg_state &= ~NG_BTSOCKET_L2CAP_CFG_IN_SENT; 745 pcb->cfg_state |= NG_BTSOCKET_L2CAP_CFG_IN; 746 747 if (pcb->cfg_state == NG_BTSOCKET_L2CAP_CFG_BOTH) { 748 /* Configuration complete - mark socket as open */ 749 ng_btsocket_l2cap_untimeout(pcb); 750 pcb->state = NG_BTSOCKET_L2CAP_OPEN; 751 soisconnected(pcb->so); 752 } 753 } else { 754 /* 755 * Something went wrong. Could be unacceptable parameters, 756 * reject or unknown option. That's too bad, but we will 757 * not negotiate. Send Disconnect and close the channel. 758 */ 759 760 ng_btsocket_l2cap_untimeout(pcb); 761 762 switch (op->result) { 763 case NG_L2CAP_UNACCEPTABLE_PARAMS: 764 case NG_L2CAP_UNKNOWN_OPTION: 765 pcb->so->so_error = EINVAL; 766 break; 767 768 default: 769 pcb->so->so_error = ECONNRESET; 770 break; 771 } 772 773 /* Send disconnect with "zero" token */ 774 ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb); 775 776 /* ... and close the socket */ 777 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 778 soisdisconnected(pcb->so); 779 } 780 781 mtx_unlock(&pcb->pcb_mtx); 782 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 783 784 return (0); 785 } /* ng_btsocket_l2cap_process_l2ca_cfg_req_rsp */ 786 787 /* 788 * Process L2CA_ConfigRsp response 789 */ 790 791 static int 792 ng_btsocket_l2cap_process_l2ca_cfg_rsp_rsp(struct ng_mesg *msg, 793 ng_btsocket_l2cap_rtentry_p rt) 794 { 795 ng_l2cap_l2ca_cfg_rsp_op *op = NULL; 796 ng_btsocket_l2cap_pcb_t *pcb = NULL; 797 int error = 0; 798 799 if (msg->header.arglen != sizeof(*op)) 800 return (EMSGSIZE); 801 802 op = (ng_l2cap_l2ca_cfg_rsp_op *)(msg->data); 803 804 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 805 806 /* Look for the socket with the token */ 807 pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token); 808 if (pcb == NULL) { 809 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 810 return (ENOENT); 811 } 812 813 mtx_lock(&pcb->pcb_mtx); 814 815 NG_BTSOCKET_L2CAP_INFO( 816 "%s: Got L2CA_ConfigRsp response, token=%d, src bdaddr=%x:%x:%x:%x:%x:%x, " \ 817 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, state=%d, " \ 818 "cfg_state=%x\n", 819 __func__, msg->header.token, 820 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3], 821 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0], 822 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3], 823 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0], 824 pcb->psm, pcb->cid, op->result, pcb->state, pcb->cfg_state); 825 826 if (pcb->state != NG_BTSOCKET_L2CAP_CONFIGURING) { 827 mtx_unlock(&pcb->pcb_mtx); 828 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 829 830 return (ENOENT); 831 } 832 833 /* Check the result and disconnect socket of failure */ 834 if (op->result != NG_L2CAP_SUCCESS) 835 goto disconnect; 836 837 /* 838 * Now we done with remote side configuration. Configure local 839 * side if we have not done it yet. 840 */ 841 842 pcb->cfg_state &= ~NG_BTSOCKET_L2CAP_CFG_OUT_SENT; 843 pcb->cfg_state |= NG_BTSOCKET_L2CAP_CFG_OUT; 844 845 if (pcb->cfg_state == NG_BTSOCKET_L2CAP_CFG_BOTH) { 846 /* Configuration complete - mask socket as open */ 847 ng_btsocket_l2cap_untimeout(pcb); 848 pcb->state = NG_BTSOCKET_L2CAP_OPEN; 849 soisconnected(pcb->so); 850 } else { 851 if (!(pcb->cfg_state & NG_BTSOCKET_L2CAP_CFG_IN_SENT)) { 852 /* Send L2CA_Config request - incoming path */ 853 error = ng_btsocket_l2cap_send_l2ca_cfg_req(pcb); 854 if (error != 0) 855 goto disconnect; 856 857 pcb->cfg_state |= NG_BTSOCKET_L2CAP_CFG_IN_SENT; 858 } 859 } 860 861 mtx_unlock(&pcb->pcb_mtx); 862 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 863 864 return (error); 865 866 disconnect: 867 ng_btsocket_l2cap_untimeout(pcb); 868 869 /* Send disconnect with "zero" token */ 870 ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb); 871 872 /* ... and close the socket */ 873 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 874 soisdisconnected(pcb->so); 875 876 mtx_unlock(&pcb->pcb_mtx); 877 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 878 879 return (error); 880 } /* ng_btsocket_l2cap_process_l2ca_cfg_rsp_rsp */ 881 882 /* 883 * Process L2CA_Config indicator 884 */ 885 886 static int 887 ng_btsocket_l2cap_process_l2ca_cfg_ind(struct ng_mesg *msg, 888 ng_btsocket_l2cap_rtentry_p rt) 889 { 890 ng_l2cap_l2ca_cfg_ind_ip *ip = NULL; 891 ng_btsocket_l2cap_pcb_t *pcb = NULL; 892 int error = 0; 893 894 if (msg->header.arglen != sizeof(*ip)) 895 return (EMSGSIZE); 896 897 ip = (ng_l2cap_l2ca_cfg_ind_ip *)(msg->data); 898 899 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 900 901 /* Check for the open socket that has given channel ID */ 902 pcb = ng_btsocket_l2cap_pcb_by_cid(&rt->src, ip->lcid); 903 if (pcb == NULL) { 904 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 905 return (ENOENT); 906 } 907 908 mtx_lock(&pcb->pcb_mtx); 909 910 NG_BTSOCKET_L2CAP_INFO( 911 "%s: Got L2CA_Config indicator, src bdaddr=%x:%x:%x:%x:%x:%x, " \ 912 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, state=%d, cfg_state=%x\n", 913 __func__, 914 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3], 915 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0], 916 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3], 917 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0], 918 pcb->psm, pcb->cid, pcb->state, pcb->cfg_state); 919 920 /* XXX FIXME re-configuration on open socket */ 921 if (pcb->state != NG_BTSOCKET_L2CAP_CONFIGURING) { 922 mtx_unlock(&pcb->pcb_mtx); 923 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 924 925 return (ENOENT); 926 } 927 928 /* 929 * XXX FIXME Actually set flush and link timeout. Set QoS here if 930 * required. Resolve conficts (flush_timo). Note outgoing MTU (peer's 931 * incoming MTU) and incoming flow spec. 932 */ 933 934 pcb->omtu = ip->omtu; 935 bcopy(&ip->iflow, &pcb->iflow, sizeof(pcb->iflow)); 936 pcb->flush_timo = ip->flush_timo; 937 938 /* 939 * Send L2CA_Config response to our peer and check for the errors, 940 * if any send disconnect to close the channel. 941 */ 942 943 if (!(pcb->cfg_state & NG_BTSOCKET_L2CAP_CFG_OUT_SENT)) { 944 error = ng_btsocket_l2cap_send_l2ca_cfg_rsp(pcb); 945 if (error != 0) { 946 ng_btsocket_l2cap_untimeout(pcb); 947 948 pcb->so->so_error = error; 949 950 /* Send disconnect with "zero" token */ 951 ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb); 952 953 /* ... and close the socket */ 954 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 955 soisdisconnected(pcb->so); 956 } else 957 pcb->cfg_state |= NG_BTSOCKET_L2CAP_CFG_OUT_SENT; 958 } 959 960 mtx_unlock(&pcb->pcb_mtx); 961 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 962 963 return (error); 964 } /* ng_btsocket_l2cap_process_l2cap_cfg_ind */ 965 966 /* 967 * Process L2CA_Disconnect response 968 */ 969 970 static int 971 ng_btsocket_l2cap_process_l2ca_discon_rsp(struct ng_mesg *msg, 972 ng_btsocket_l2cap_rtentry_p rt) 973 { 974 ng_l2cap_l2ca_discon_op *op = NULL; 975 ng_btsocket_l2cap_pcb_t *pcb = NULL; 976 977 /* Check message */ 978 if (msg->header.arglen != sizeof(*op)) 979 return (EMSGSIZE); 980 981 op = (ng_l2cap_l2ca_discon_op *)(msg->data); 982 983 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 984 985 /* 986 * Socket layer must have issued L2CA_Disconnect request, so there 987 * must be a socket that wants to be disconnected. Use Netgraph 988 * message token to find it. 989 */ 990 991 pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token); 992 if (pcb == NULL) { 993 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 994 return (0); 995 } 996 997 mtx_lock(&pcb->pcb_mtx); 998 999 /* XXX Close socket no matter what op->result says */ 1000 if (pcb->state != NG_BTSOCKET_L2CAP_CLOSED) { 1001 NG_BTSOCKET_L2CAP_INFO( 1002 "%s: Got L2CA_Disconnect response, token=%d, src bdaddr=%x:%x:%x:%x:%x:%x, " \ 1003 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, state=%d\n", 1004 __func__, msg->header.token, 1005 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3], 1006 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0], 1007 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3], 1008 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0], 1009 pcb->psm, pcb->cid, op->result, pcb->state); 1010 1011 ng_btsocket_l2cap_untimeout(pcb); 1012 1013 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 1014 soisdisconnected(pcb->so); 1015 } 1016 1017 mtx_unlock(&pcb->pcb_mtx); 1018 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1019 1020 return (0); 1021 } /* ng_btsocket_l2cap_process_l2ca_discon_rsp */ 1022 1023 /* 1024 * Process L2CA_Disconnect indicator 1025 */ 1026 1027 static int 1028 ng_btsocket_l2cap_process_l2ca_discon_ind(struct ng_mesg *msg, 1029 ng_btsocket_l2cap_rtentry_p rt) 1030 { 1031 ng_l2cap_l2ca_discon_ind_ip *ip = NULL; 1032 ng_btsocket_l2cap_pcb_t *pcb = NULL; 1033 1034 /* Check message */ 1035 if (msg->header.arglen != sizeof(*ip)) 1036 return (EMSGSIZE); 1037 1038 ip = (ng_l2cap_l2ca_discon_ind_ip *)(msg->data); 1039 1040 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 1041 1042 /* Look for the socket with given channel ID */ 1043 pcb = ng_btsocket_l2cap_pcb_by_cid(&rt->src, ip->lcid); 1044 if (pcb == NULL) { 1045 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1046 return (0); 1047 } 1048 1049 /* 1050 * Channel has already been destroyed, so disconnect the socket 1051 * and be done with it. If there was any pending request we can 1052 * not do anything here anyway. 1053 */ 1054 1055 mtx_lock(&pcb->pcb_mtx); 1056 1057 NG_BTSOCKET_L2CAP_INFO( 1058 "%s: Got L2CA_Disconnect indicator, src bdaddr=%x:%x:%x:%x:%x:%x, " \ 1059 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, state=%d\n", 1060 __func__, 1061 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3], 1062 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0], 1063 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3], 1064 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0], 1065 pcb->psm, pcb->cid, pcb->state); 1066 1067 if (pcb->flags & NG_BTSOCKET_L2CAP_TIMO) 1068 ng_btsocket_l2cap_untimeout(pcb); 1069 1070 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 1071 soisdisconnected(pcb->so); 1072 1073 mtx_unlock(&pcb->pcb_mtx); 1074 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1075 1076 return (0); 1077 } /* ng_btsocket_l2cap_process_l2ca_discon_ind */ 1078 1079 /* 1080 * Process L2CA_Write response 1081 */ 1082 1083 static int 1084 ng_btsocket_l2cap_process_l2ca_write_rsp(struct ng_mesg *msg, 1085 ng_btsocket_l2cap_rtentry_p rt) 1086 { 1087 ng_l2cap_l2ca_write_op *op = NULL; 1088 ng_btsocket_l2cap_pcb_t *pcb = NULL; 1089 1090 /* Check message */ 1091 if (msg->header.arglen != sizeof(*op)) 1092 return (EMSGSIZE); 1093 1094 op = (ng_l2cap_l2ca_write_op *)(msg->data); 1095 1096 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 1097 1098 /* Look for the socket with given token */ 1099 pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token); 1100 if (pcb == NULL) { 1101 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1102 return (ENOENT); 1103 } 1104 1105 mtx_lock(&pcb->pcb_mtx); 1106 1107 NG_BTSOCKET_L2CAP_INFO( 1108 "%s: Got L2CA_Write response, src bdaddr=%x:%x:%x:%x:%x:%x, " \ 1109 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, length=%d, " \ 1110 "state=%d\n", __func__, 1111 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3], 1112 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0], 1113 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3], 1114 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0], 1115 pcb->psm, pcb->cid, op->result, op->length, 1116 pcb->state); 1117 1118 if (pcb->state != NG_BTSOCKET_L2CAP_OPEN) { 1119 mtx_unlock(&pcb->pcb_mtx); 1120 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1121 1122 return (ENOENT); 1123 } 1124 1125 ng_btsocket_l2cap_untimeout(pcb); 1126 1127 /* 1128 * Check if we have more data to send 1129 */ 1130 sbdroprecord(&pcb->so->so_snd); 1131 if (sbavail(&pcb->so->so_snd) > 0) { 1132 if (ng_btsocket_l2cap_send2(pcb) == 0) 1133 ng_btsocket_l2cap_timeout(pcb); 1134 else 1135 sbdroprecord(&pcb->so->so_snd); /* XXX */ 1136 } 1137 1138 /* 1139 * Now set the result, drop packet from the socket send queue and 1140 * ask for more (wakeup sender) 1141 */ 1142 1143 pcb->so->so_error = ng_btsocket_l2cap_result2errno(op->result); 1144 sowwakeup(pcb->so); 1145 1146 mtx_unlock(&pcb->pcb_mtx); 1147 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1148 1149 return (0); 1150 } /* ng_btsocket_l2cap_process_l2ca_write_rsp */ 1151 1152 /* 1153 * Send L2CA_Connect request 1154 */ 1155 1156 static int 1157 ng_btsocket_l2cap_send_l2ca_con_req(ng_btsocket_l2cap_pcb_p pcb) 1158 { 1159 struct ng_mesg *msg = NULL; 1160 ng_l2cap_l2ca_con_ip *ip = NULL; 1161 int error = 0; 1162 1163 mtx_assert(&pcb->pcb_mtx, MA_OWNED); 1164 1165 if (pcb->rt == NULL || 1166 pcb->rt->hook == NULL || NG_HOOK_NOT_VALID(pcb->rt->hook)) 1167 return (ENETDOWN); 1168 1169 NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CON, 1170 sizeof(*ip), M_NOWAIT); 1171 if (msg == NULL) 1172 return (ENOMEM); 1173 1174 msg->header.token = pcb->token; 1175 1176 ip = (ng_l2cap_l2ca_con_ip *)(msg->data); 1177 bcopy(&pcb->dst, &ip->bdaddr, sizeof(ip->bdaddr)); 1178 ip->psm = pcb->psm; 1179 1180 NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_node, msg,pcb->rt->hook, 0); 1181 1182 return (error); 1183 } /* ng_btsocket_l2cap_send_l2ca_con_req */ 1184 1185 /* 1186 * Send L2CA_Connect response 1187 */ 1188 1189 static int 1190 ng_btsocket_l2cap_send_l2ca_con_rsp_req(u_int32_t token, 1191 ng_btsocket_l2cap_rtentry_p rt, bdaddr_p dst, int ident, 1192 int lcid, int result) 1193 { 1194 struct ng_mesg *msg = NULL; 1195 ng_l2cap_l2ca_con_rsp_ip *ip = NULL; 1196 int error = 0; 1197 1198 if (rt == NULL || rt->hook == NULL || NG_HOOK_NOT_VALID(rt->hook)) 1199 return (ENETDOWN); 1200 1201 NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CON_RSP, 1202 sizeof(*ip), M_NOWAIT); 1203 if (msg == NULL) 1204 return (ENOMEM); 1205 1206 msg->header.token = token; 1207 1208 ip = (ng_l2cap_l2ca_con_rsp_ip *)(msg->data); 1209 bcopy(dst, &ip->bdaddr, sizeof(ip->bdaddr)); 1210 ip->ident = ident; 1211 ip->lcid = lcid; 1212 ip->result = result; 1213 ip->status = 0; 1214 1215 NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_node, msg, rt->hook, 0); 1216 1217 return (error); 1218 } /* ng_btsocket_l2cap_send_l2ca_con_rsp_req */ 1219 1220 /* 1221 * Send L2CA_Config request 1222 */ 1223 1224 static int 1225 ng_btsocket_l2cap_send_l2ca_cfg_req(ng_btsocket_l2cap_pcb_p pcb) 1226 { 1227 struct ng_mesg *msg = NULL; 1228 ng_l2cap_l2ca_cfg_ip *ip = NULL; 1229 int error = 0; 1230 1231 mtx_assert(&pcb->pcb_mtx, MA_OWNED); 1232 1233 if (pcb->rt == NULL || 1234 pcb->rt->hook == NULL || NG_HOOK_NOT_VALID(pcb->rt->hook)) 1235 return (ENETDOWN); 1236 1237 NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CFG, 1238 sizeof(*ip), M_NOWAIT); 1239 if (msg == NULL) 1240 return (ENOMEM); 1241 1242 msg->header.token = pcb->token; 1243 1244 ip = (ng_l2cap_l2ca_cfg_ip *)(msg->data); 1245 ip->lcid = pcb->cid; 1246 ip->imtu = pcb->imtu; 1247 bcopy(&pcb->oflow, &ip->oflow, sizeof(ip->oflow)); 1248 ip->flush_timo = pcb->flush_timo; 1249 ip->link_timo = pcb->link_timo; 1250 1251 NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_node, msg,pcb->rt->hook, 0); 1252 1253 return (error); 1254 } /* ng_btsocket_l2cap_send_l2ca_cfg_req */ 1255 1256 /* 1257 * Send L2CA_Config response 1258 */ 1259 1260 static int 1261 ng_btsocket_l2cap_send_l2ca_cfg_rsp(ng_btsocket_l2cap_pcb_p pcb) 1262 { 1263 struct ng_mesg *msg = NULL; 1264 ng_l2cap_l2ca_cfg_rsp_ip *ip = NULL; 1265 int error = 0; 1266 1267 mtx_assert(&pcb->pcb_mtx, MA_OWNED); 1268 1269 if (pcb->rt == NULL || 1270 pcb->rt->hook == NULL || NG_HOOK_NOT_VALID(pcb->rt->hook)) 1271 return (ENETDOWN); 1272 1273 NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CFG_RSP, 1274 sizeof(*ip), M_NOWAIT); 1275 if (msg == NULL) 1276 return (ENOMEM); 1277 1278 msg->header.token = pcb->token; 1279 1280 ip = (ng_l2cap_l2ca_cfg_rsp_ip *)(msg->data); 1281 ip->lcid = pcb->cid; 1282 ip->omtu = pcb->omtu; 1283 bcopy(&pcb->iflow, &ip->iflow, sizeof(ip->iflow)); 1284 1285 NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_node, msg, pcb->rt->hook, 0); 1286 1287 return (error); 1288 } /* ng_btsocket_l2cap_send_l2ca_cfg_rsp */ 1289 1290 /* 1291 * Send L2CA_Disconnect request 1292 */ 1293 1294 static int 1295 ng_btsocket_l2cap_send_l2ca_discon_req(u_int32_t token, 1296 ng_btsocket_l2cap_pcb_p pcb) 1297 { 1298 struct ng_mesg *msg = NULL; 1299 ng_l2cap_l2ca_discon_ip *ip = NULL; 1300 int error = 0; 1301 1302 mtx_assert(&pcb->pcb_mtx, MA_OWNED); 1303 1304 if (pcb->rt == NULL || 1305 pcb->rt->hook == NULL || NG_HOOK_NOT_VALID(pcb->rt->hook)) 1306 return (ENETDOWN); 1307 1308 NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_DISCON, 1309 sizeof(*ip), M_NOWAIT); 1310 if (msg == NULL) 1311 return (ENOMEM); 1312 1313 msg->header.token = token; 1314 1315 ip = (ng_l2cap_l2ca_discon_ip *)(msg->data); 1316 ip->lcid = pcb->cid; 1317 1318 NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_node, msg,pcb->rt->hook, 0); 1319 1320 return (error); 1321 } /* ng_btsocket_l2cap_send_l2ca_discon_req */ 1322 1323 /***************************************************************************** 1324 ***************************************************************************** 1325 ** Socket interface 1326 ***************************************************************************** 1327 *****************************************************************************/ 1328 1329 /* 1330 * L2CAP sockets data input routine 1331 */ 1332 1333 static void 1334 ng_btsocket_l2cap_data_input(struct mbuf *m, hook_p hook) 1335 { 1336 ng_l2cap_hdr_t *hdr = NULL; 1337 ng_l2cap_clt_hdr_t *clt_hdr = NULL; 1338 ng_btsocket_l2cap_pcb_t *pcb = NULL; 1339 ng_btsocket_l2cap_rtentry_t *rt = NULL; 1340 1341 if (hook == NULL) { 1342 NG_BTSOCKET_L2CAP_ALERT( 1343 "%s: Invalid source hook for L2CAP data packet\n", __func__); 1344 goto drop; 1345 } 1346 1347 rt = (ng_btsocket_l2cap_rtentry_t *) NG_HOOK_PRIVATE(hook); 1348 if (rt == NULL) { 1349 NG_BTSOCKET_L2CAP_ALERT( 1350 "%s: Could not find out source bdaddr for L2CAP data packet\n", __func__); 1351 goto drop; 1352 } 1353 1354 /* Make sure we can access header */ 1355 if (m->m_pkthdr.len < sizeof(*hdr)) { 1356 NG_BTSOCKET_L2CAP_ERR( 1357 "%s: L2CAP data packet too small, len=%d\n", __func__, m->m_pkthdr.len); 1358 goto drop; 1359 } 1360 1361 if (m->m_len < sizeof(*hdr)) { 1362 m = m_pullup(m, sizeof(*hdr)); 1363 if (m == NULL) 1364 goto drop; 1365 } 1366 1367 /* Strip L2CAP packet header and verify packet length */ 1368 hdr = mtod(m, ng_l2cap_hdr_t *); 1369 m_adj(m, sizeof(*hdr)); 1370 1371 if (hdr->length != m->m_pkthdr.len) { 1372 NG_BTSOCKET_L2CAP_ERR( 1373 "%s: Bad L2CAP data packet length, len=%d, length=%d\n", 1374 __func__, m->m_pkthdr.len, hdr->length); 1375 goto drop; 1376 } 1377 1378 /* 1379 * Now process packet. Two cases: 1380 * 1381 * 1) Normal packet (cid != 2) then find connected socket and append 1382 * mbuf to the socket queue. Wakeup socket. 1383 * 1384 * 2) Broadcast packet (cid == 2) then find all sockets that connected 1385 * to the given PSM and have SO_BROADCAST bit set and append mbuf 1386 * to the socket queue. Wakeup socket. 1387 */ 1388 1389 NG_BTSOCKET_L2CAP_INFO( 1390 "%s: Received L2CAP data packet: src bdaddr=%x:%x:%x:%x:%x:%x, " \ 1391 "dcid=%d, length=%d\n", 1392 __func__, 1393 rt->src.b[5], rt->src.b[4], rt->src.b[3], 1394 rt->src.b[2], rt->src.b[1], rt->src.b[0], 1395 hdr->dcid, hdr->length); 1396 1397 if (hdr->dcid >= NG_L2CAP_FIRST_CID) { 1398 1399 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 1400 1401 /* Normal packet: find connected socket */ 1402 pcb = ng_btsocket_l2cap_pcb_by_cid(&rt->src, hdr->dcid); 1403 if (pcb == NULL) { 1404 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1405 goto drop; 1406 } 1407 1408 mtx_lock(&pcb->pcb_mtx); 1409 1410 if (pcb->state != NG_BTSOCKET_L2CAP_OPEN) { 1411 NG_BTSOCKET_L2CAP_ERR( 1412 "%s: No connected socket found, src bdaddr=%x:%x:%x:%x:%x:%x, dcid=%d, " \ 1413 "state=%d\n", __func__, 1414 rt->src.b[5], rt->src.b[4], rt->src.b[3], 1415 rt->src.b[2], rt->src.b[1], rt->src.b[0], 1416 hdr->dcid, pcb->state); 1417 1418 mtx_unlock(&pcb->pcb_mtx); 1419 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1420 goto drop; 1421 } 1422 1423 /* Check packet size against socket's incoming MTU */ 1424 if (hdr->length > pcb->imtu) { 1425 NG_BTSOCKET_L2CAP_ERR( 1426 "%s: L2CAP data packet too big, src bdaddr=%x:%x:%x:%x:%x:%x, " \ 1427 "dcid=%d, length=%d, imtu=%d\n", 1428 __func__, 1429 rt->src.b[5], rt->src.b[4], rt->src.b[3], 1430 rt->src.b[2], rt->src.b[1], rt->src.b[0], 1431 hdr->dcid, hdr->length, pcb->imtu); 1432 1433 mtx_unlock(&pcb->pcb_mtx); 1434 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1435 goto drop; 1436 } 1437 1438 /* Check if we have enough space in socket receive queue */ 1439 if (m->m_pkthdr.len > sbspace(&pcb->so->so_rcv)) { 1440 1441 /* 1442 * This is really bad. Receive queue on socket does 1443 * not have enough space for the packet. We do not 1444 * have any other choice but drop the packet. L2CAP 1445 * does not provide any flow control. 1446 */ 1447 1448 NG_BTSOCKET_L2CAP_ERR( 1449 "%s: Not enough space in socket receive queue. Dropping L2CAP data packet, " \ 1450 "src bdaddr=%x:%x:%x:%x:%x:%x, dcid=%d, len=%d, space=%ld\n", 1451 __func__, 1452 rt->src.b[5], rt->src.b[4], rt->src.b[3], 1453 rt->src.b[2], rt->src.b[1], rt->src.b[0], 1454 hdr->dcid, m->m_pkthdr.len, 1455 sbspace(&pcb->so->so_rcv)); 1456 1457 mtx_unlock(&pcb->pcb_mtx); 1458 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1459 goto drop; 1460 } 1461 1462 /* Append packet to the socket receive queue and wakeup */ 1463 sbappendrecord(&pcb->so->so_rcv, m); 1464 m = NULL; 1465 1466 sorwakeup(pcb->so); 1467 1468 mtx_unlock(&pcb->pcb_mtx); 1469 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1470 } else if (hdr->dcid == NG_L2CAP_CLT_CID) { 1471 /* Broadcast packet: give packet to all sockets */ 1472 1473 /* Check packet size against connectionless MTU */ 1474 if (hdr->length > NG_L2CAP_MTU_DEFAULT) { 1475 NG_BTSOCKET_L2CAP_ERR( 1476 "%s: Connectionless L2CAP data packet too big, " \ 1477 "src bdaddr=%x:%x:%x:%x:%x:%x, length=%d\n", 1478 __func__, 1479 rt->src.b[5], rt->src.b[4], rt->src.b[3], 1480 rt->src.b[2], rt->src.b[1], rt->src.b[0], 1481 hdr->length); 1482 goto drop; 1483 } 1484 1485 /* Make sure we can access connectionless header */ 1486 if (m->m_pkthdr.len < sizeof(*clt_hdr)) { 1487 NG_BTSOCKET_L2CAP_ERR( 1488 "%s: Can not get L2CAP connectionless packet header, " \ 1489 "src bdaddr=%x:%x:%x:%x:%x:%x, length=%d\n", 1490 __func__, 1491 rt->src.b[5], rt->src.b[4], rt->src.b[3], 1492 rt->src.b[2], rt->src.b[1], rt->src.b[0], 1493 hdr->length); 1494 goto drop; 1495 } 1496 1497 if (m->m_len < sizeof(*clt_hdr)) { 1498 m = m_pullup(m, sizeof(*clt_hdr)); 1499 if (m == NULL) 1500 goto drop; 1501 } 1502 1503 /* Strip connectionless header and deliver packet */ 1504 clt_hdr = mtod(m, ng_l2cap_clt_hdr_t *); 1505 m_adj(m, sizeof(*clt_hdr)); 1506 1507 NG_BTSOCKET_L2CAP_INFO( 1508 "%s: Got L2CAP connectionless data packet, " \ 1509 "src bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, length=%d\n", 1510 __func__, 1511 rt->src.b[5], rt->src.b[4], rt->src.b[3], 1512 rt->src.b[2], rt->src.b[1], rt->src.b[0], 1513 clt_hdr->psm, hdr->length); 1514 1515 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 1516 1517 LIST_FOREACH(pcb, &ng_btsocket_l2cap_sockets, next) { 1518 struct mbuf *copy = NULL; 1519 1520 mtx_lock(&pcb->pcb_mtx); 1521 1522 if (bcmp(&rt->src, &pcb->src, sizeof(pcb->src)) != 0 || 1523 pcb->psm != clt_hdr->psm || 1524 pcb->state != NG_BTSOCKET_L2CAP_OPEN || 1525 (pcb->so->so_options & SO_BROADCAST) == 0 || 1526 m->m_pkthdr.len > sbspace(&pcb->so->so_rcv)) 1527 goto next; 1528 1529 /* 1530 * Create a copy of the packet and append it to the 1531 * socket's queue. If m_dup() failed - no big deal 1532 * it is a broadcast traffic after all 1533 */ 1534 1535 copy = m_dup(m, M_NOWAIT); 1536 if (copy != NULL) { 1537 sbappendrecord(&pcb->so->so_rcv, copy); 1538 sorwakeup(pcb->so); 1539 } 1540 next: 1541 mtx_unlock(&pcb->pcb_mtx); 1542 } 1543 1544 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1545 } 1546 drop: 1547 NG_FREE_M(m); /* checks for m != NULL */ 1548 } /* ng_btsocket_l2cap_data_input */ 1549 1550 /* 1551 * L2CAP sockets default message input routine 1552 */ 1553 1554 static void 1555 ng_btsocket_l2cap_default_msg_input(struct ng_mesg *msg, hook_p hook) 1556 { 1557 switch (msg->header.cmd) { 1558 case NGM_L2CAP_NODE_HOOK_INFO: { 1559 ng_btsocket_l2cap_rtentry_t *rt = NULL; 1560 1561 if (hook == NULL || msg->header.arglen != sizeof(bdaddr_t)) 1562 break; 1563 1564 if (bcmp(msg->data, NG_HCI_BDADDR_ANY, sizeof(bdaddr_t)) == 0) 1565 break; 1566 1567 mtx_lock(&ng_btsocket_l2cap_rt_mtx); 1568 1569 rt = (ng_btsocket_l2cap_rtentry_t *) NG_HOOK_PRIVATE(hook); 1570 if (rt == NULL) { 1571 rt = malloc(sizeof(*rt), 1572 M_NETGRAPH_BTSOCKET_L2CAP, M_NOWAIT|M_ZERO); 1573 if (rt == NULL) { 1574 mtx_unlock(&ng_btsocket_l2cap_rt_mtx); 1575 break; 1576 } 1577 1578 LIST_INSERT_HEAD(&ng_btsocket_l2cap_rt, rt, next); 1579 1580 NG_HOOK_SET_PRIVATE(hook, rt); 1581 } 1582 1583 bcopy(msg->data, &rt->src, sizeof(rt->src)); 1584 rt->hook = hook; 1585 1586 mtx_unlock(&ng_btsocket_l2cap_rt_mtx); 1587 1588 NG_BTSOCKET_L2CAP_INFO( 1589 "%s: Updating hook \"%s\", src bdaddr=%x:%x:%x:%x:%x:%x\n", 1590 __func__, NG_HOOK_NAME(hook), 1591 rt->src.b[5], rt->src.b[4], rt->src.b[3], 1592 rt->src.b[2], rt->src.b[1], rt->src.b[0]); 1593 } break; 1594 1595 default: 1596 NG_BTSOCKET_L2CAP_WARN( 1597 "%s: Unknown message, cmd=%d\n", __func__, msg->header.cmd); 1598 break; 1599 } 1600 1601 NG_FREE_MSG(msg); /* Checks for msg != NULL */ 1602 } /* ng_btsocket_l2cap_default_msg_input */ 1603 1604 /* 1605 * L2CAP sockets L2CA message input routine 1606 */ 1607 1608 static void 1609 ng_btsocket_l2cap_l2ca_msg_input(struct ng_mesg *msg, hook_p hook) 1610 { 1611 ng_btsocket_l2cap_rtentry_p rt = NULL; 1612 1613 if (hook == NULL) { 1614 NG_BTSOCKET_L2CAP_ALERT( 1615 "%s: Invalid source hook for L2CA message\n", __func__); 1616 goto drop; 1617 } 1618 1619 rt = (ng_btsocket_l2cap_rtentry_p) NG_HOOK_PRIVATE(hook); 1620 if (rt == NULL) { 1621 NG_BTSOCKET_L2CAP_ALERT( 1622 "%s: Could not find out source bdaddr for L2CA message\n", __func__); 1623 goto drop; 1624 } 1625 1626 switch (msg->header.cmd) { 1627 case NGM_L2CAP_L2CA_CON: /* L2CA_Connect response */ 1628 ng_btsocket_l2cap_process_l2ca_con_req_rsp(msg, rt); 1629 break; 1630 1631 case NGM_L2CAP_L2CA_CON_RSP: /* L2CA_ConnectRsp response */ 1632 ng_btsocket_l2cap_process_l2ca_con_rsp_rsp(msg, rt); 1633 break; 1634 1635 case NGM_L2CAP_L2CA_CON_IND: /* L2CA_Connect indicator */ 1636 ng_btsocket_l2cap_process_l2ca_con_ind(msg, rt); 1637 break; 1638 1639 case NGM_L2CAP_L2CA_CFG: /* L2CA_Config response */ 1640 ng_btsocket_l2cap_process_l2ca_cfg_req_rsp(msg, rt); 1641 break; 1642 1643 case NGM_L2CAP_L2CA_CFG_RSP: /* L2CA_ConfigRsp response */ 1644 ng_btsocket_l2cap_process_l2ca_cfg_rsp_rsp(msg, rt); 1645 break; 1646 1647 case NGM_L2CAP_L2CA_CFG_IND: /* L2CA_Config indicator */ 1648 ng_btsocket_l2cap_process_l2ca_cfg_ind(msg, rt); 1649 break; 1650 1651 case NGM_L2CAP_L2CA_DISCON: /* L2CA_Disconnect response */ 1652 ng_btsocket_l2cap_process_l2ca_discon_rsp(msg, rt); 1653 break; 1654 1655 case NGM_L2CAP_L2CA_DISCON_IND: /* L2CA_Disconnect indicator */ 1656 ng_btsocket_l2cap_process_l2ca_discon_ind(msg, rt); 1657 break; 1658 1659 case NGM_L2CAP_L2CA_WRITE: /* L2CA_Write response */ 1660 ng_btsocket_l2cap_process_l2ca_write_rsp(msg, rt); 1661 break; 1662 1663 /* XXX FIXME add other L2CA messages */ 1664 1665 default: 1666 NG_BTSOCKET_L2CAP_WARN( 1667 "%s: Unknown L2CA message, cmd=%d\n", __func__, msg->header.cmd); 1668 break; 1669 } 1670 drop: 1671 NG_FREE_MSG(msg); 1672 } /* ng_btsocket_l2cap_l2ca_msg_input */ 1673 1674 /* 1675 * L2CAP sockets input routine 1676 */ 1677 1678 static void 1679 ng_btsocket_l2cap_input(void *context, int pending) 1680 { 1681 item_p item = NULL; 1682 hook_p hook = NULL; 1683 1684 for (;;) { 1685 mtx_lock(&ng_btsocket_l2cap_queue_mtx); 1686 NG_BT_ITEMQ_DEQUEUE(&ng_btsocket_l2cap_queue, item); 1687 mtx_unlock(&ng_btsocket_l2cap_queue_mtx); 1688 1689 if (item == NULL) 1690 break; 1691 1692 NGI_GET_HOOK(item, hook); 1693 if (hook != NULL && NG_HOOK_NOT_VALID(hook)) 1694 goto drop; 1695 1696 switch(item->el_flags & NGQF_TYPE) { 1697 case NGQF_DATA: { 1698 struct mbuf *m = NULL; 1699 1700 NGI_GET_M(item, m); 1701 ng_btsocket_l2cap_data_input(m, hook); 1702 } break; 1703 1704 case NGQF_MESG: { 1705 struct ng_mesg *msg = NULL; 1706 1707 NGI_GET_MSG(item, msg); 1708 1709 switch (msg->header.cmd) { 1710 case NGM_L2CAP_L2CA_CON: 1711 case NGM_L2CAP_L2CA_CON_RSP: 1712 case NGM_L2CAP_L2CA_CON_IND: 1713 case NGM_L2CAP_L2CA_CFG: 1714 case NGM_L2CAP_L2CA_CFG_RSP: 1715 case NGM_L2CAP_L2CA_CFG_IND: 1716 case NGM_L2CAP_L2CA_DISCON: 1717 case NGM_L2CAP_L2CA_DISCON_IND: 1718 case NGM_L2CAP_L2CA_WRITE: 1719 /* XXX FIXME add other L2CA messages */ 1720 ng_btsocket_l2cap_l2ca_msg_input(msg, hook); 1721 break; 1722 1723 default: 1724 ng_btsocket_l2cap_default_msg_input(msg, hook); 1725 break; 1726 } 1727 } break; 1728 1729 default: 1730 KASSERT(0, 1731 ("%s: invalid item type=%ld\n", __func__, (item->el_flags & NGQF_TYPE))); 1732 break; 1733 } 1734 drop: 1735 if (hook != NULL) 1736 NG_HOOK_UNREF(hook); 1737 1738 NG_FREE_ITEM(item); 1739 } 1740 } /* ng_btsocket_l2cap_input */ 1741 1742 /* 1743 * Route cleanup task. Gets scheduled when hook is disconnected. Here we 1744 * will find all sockets that use "invalid" hook and disconnect them. 1745 */ 1746 1747 static void 1748 ng_btsocket_l2cap_rtclean(void *context, int pending) 1749 { 1750 ng_btsocket_l2cap_pcb_p pcb = NULL, pcb_next = NULL; 1751 ng_btsocket_l2cap_rtentry_p rt = NULL; 1752 1753 mtx_lock(&ng_btsocket_l2cap_rt_mtx); 1754 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 1755 1756 /* 1757 * First disconnect all sockets that use "invalid" hook 1758 */ 1759 1760 for (pcb = LIST_FIRST(&ng_btsocket_l2cap_sockets); pcb != NULL; ) { 1761 mtx_lock(&pcb->pcb_mtx); 1762 pcb_next = LIST_NEXT(pcb, next); 1763 1764 if (pcb->rt != NULL && 1765 pcb->rt->hook != NULL && NG_HOOK_NOT_VALID(pcb->rt->hook)) { 1766 if (pcb->flags & NG_BTSOCKET_L2CAP_TIMO) 1767 ng_btsocket_l2cap_untimeout(pcb); 1768 1769 pcb->so->so_error = ENETDOWN; 1770 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 1771 soisdisconnected(pcb->so); 1772 1773 pcb->token = 0; 1774 pcb->cid = 0; 1775 pcb->rt = NULL; 1776 } 1777 1778 mtx_unlock(&pcb->pcb_mtx); 1779 pcb = pcb_next; 1780 } 1781 1782 /* 1783 * Now cleanup routing table 1784 */ 1785 1786 for (rt = LIST_FIRST(&ng_btsocket_l2cap_rt); rt != NULL; ) { 1787 ng_btsocket_l2cap_rtentry_p rt_next = LIST_NEXT(rt, next); 1788 1789 if (rt->hook != NULL && NG_HOOK_NOT_VALID(rt->hook)) { 1790 LIST_REMOVE(rt, next); 1791 1792 NG_HOOK_SET_PRIVATE(rt->hook, NULL); 1793 NG_HOOK_UNREF(rt->hook); /* Remove extra reference */ 1794 1795 bzero(rt, sizeof(*rt)); 1796 free(rt, M_NETGRAPH_BTSOCKET_L2CAP); 1797 } 1798 1799 rt = rt_next; 1800 } 1801 1802 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 1803 mtx_unlock(&ng_btsocket_l2cap_rt_mtx); 1804 } /* ng_btsocket_l2cap_rtclean */ 1805 1806 /* 1807 * Initialize everything 1808 */ 1809 1810 void 1811 ng_btsocket_l2cap_init(void) 1812 { 1813 int error = 0; 1814 1815 /* Skip initialization of globals for non-default instances. */ 1816 if (!IS_DEFAULT_VNET(curvnet)) 1817 return; 1818 1819 ng_btsocket_l2cap_node = NULL; 1820 ng_btsocket_l2cap_debug_level = NG_BTSOCKET_WARN_LEVEL; 1821 1822 /* Register Netgraph node type */ 1823 error = ng_newtype(&typestruct); 1824 if (error != 0) { 1825 NG_BTSOCKET_L2CAP_ALERT( 1826 "%s: Could not register Netgraph node type, error=%d\n", __func__, error); 1827 1828 return; 1829 } 1830 1831 /* Create Netgrapg node */ 1832 error = ng_make_node_common(&typestruct, &ng_btsocket_l2cap_node); 1833 if (error != 0) { 1834 NG_BTSOCKET_L2CAP_ALERT( 1835 "%s: Could not create Netgraph node, error=%d\n", __func__, error); 1836 1837 ng_btsocket_l2cap_node = NULL; 1838 1839 return; 1840 } 1841 1842 error = ng_name_node(ng_btsocket_l2cap_node, 1843 NG_BTSOCKET_L2CAP_NODE_TYPE); 1844 if (error != 0) { 1845 NG_BTSOCKET_L2CAP_ALERT( 1846 "%s: Could not name Netgraph node, error=%d\n", __func__, error); 1847 1848 NG_NODE_UNREF(ng_btsocket_l2cap_node); 1849 ng_btsocket_l2cap_node = NULL; 1850 1851 return; 1852 } 1853 1854 /* Create input queue */ 1855 NG_BT_ITEMQ_INIT(&ng_btsocket_l2cap_queue, ifqmaxlen); 1856 mtx_init(&ng_btsocket_l2cap_queue_mtx, 1857 "btsocks_l2cap_queue_mtx", NULL, MTX_DEF); 1858 TASK_INIT(&ng_btsocket_l2cap_queue_task, 0, 1859 ng_btsocket_l2cap_input, NULL); 1860 1861 /* Create list of sockets */ 1862 LIST_INIT(&ng_btsocket_l2cap_sockets); 1863 mtx_init(&ng_btsocket_l2cap_sockets_mtx, 1864 "btsocks_l2cap_sockets_mtx", NULL, MTX_DEF); 1865 1866 /* Routing table */ 1867 LIST_INIT(&ng_btsocket_l2cap_rt); 1868 mtx_init(&ng_btsocket_l2cap_rt_mtx, 1869 "btsocks_l2cap_rt_mtx", NULL, MTX_DEF); 1870 TASK_INIT(&ng_btsocket_l2cap_rt_task, 0, 1871 ng_btsocket_l2cap_rtclean, NULL); 1872 } /* ng_btsocket_l2cap_init */ 1873 1874 /* 1875 * Abort connection on socket 1876 */ 1877 1878 void 1879 ng_btsocket_l2cap_abort(struct socket *so) 1880 { 1881 so->so_error = ECONNABORTED; 1882 1883 (void)ng_btsocket_l2cap_disconnect(so); 1884 } /* ng_btsocket_l2cap_abort */ 1885 1886 void 1887 ng_btsocket_l2cap_close(struct socket *so) 1888 { 1889 1890 (void)ng_btsocket_l2cap_disconnect(so); 1891 } /* ng_btsocket_l2cap_close */ 1892 1893 /* 1894 * Accept connection on socket. Nothing to do here, socket must be connected 1895 * and ready, so just return peer address and be done with it. 1896 */ 1897 1898 int 1899 ng_btsocket_l2cap_accept(struct socket *so, struct sockaddr **nam) 1900 { 1901 if (ng_btsocket_l2cap_node == NULL) 1902 return (EINVAL); 1903 1904 return (ng_btsocket_l2cap_peeraddr(so, nam)); 1905 } /* ng_btsocket_l2cap_accept */ 1906 1907 /* 1908 * Create and attach new socket 1909 */ 1910 1911 int 1912 ng_btsocket_l2cap_attach(struct socket *so, int proto, struct thread *td) 1913 { 1914 static u_int32_t token = 0; 1915 ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so); 1916 int error; 1917 1918 /* Check socket and protocol */ 1919 if (ng_btsocket_l2cap_node == NULL) 1920 return (EPROTONOSUPPORT); 1921 if (so->so_type != SOCK_SEQPACKET) 1922 return (ESOCKTNOSUPPORT); 1923 1924 #if 0 /* XXX sonewconn() calls "pru_attach" with proto == 0 */ 1925 if (proto != 0) 1926 if (proto != BLUETOOTH_PROTO_L2CAP) 1927 return (EPROTONOSUPPORT); 1928 #endif /* XXX */ 1929 1930 if (pcb != NULL) 1931 return (EISCONN); 1932 1933 /* Reserve send and receive space if it is not reserved yet */ 1934 if ((so->so_snd.sb_hiwat == 0) || (so->so_rcv.sb_hiwat == 0)) { 1935 error = soreserve(so, NG_BTSOCKET_L2CAP_SENDSPACE, 1936 NG_BTSOCKET_L2CAP_RECVSPACE); 1937 if (error != 0) 1938 return (error); 1939 } 1940 1941 /* Allocate the PCB */ 1942 pcb = malloc(sizeof(*pcb), 1943 M_NETGRAPH_BTSOCKET_L2CAP, M_NOWAIT | M_ZERO); 1944 if (pcb == NULL) 1945 return (ENOMEM); 1946 1947 /* Link the PCB and the socket */ 1948 so->so_pcb = (caddr_t) pcb; 1949 pcb->so = so; 1950 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 1951 1952 /* Initialize PCB */ 1953 pcb->imtu = pcb->omtu = NG_L2CAP_MTU_DEFAULT; 1954 1955 /* Default flow */ 1956 pcb->iflow.flags = 0x0; 1957 pcb->iflow.service_type = NG_HCI_SERVICE_TYPE_BEST_EFFORT; 1958 pcb->iflow.token_rate = 0xffffffff; /* maximum */ 1959 pcb->iflow.token_bucket_size = 0xffffffff; /* maximum */ 1960 pcb->iflow.peak_bandwidth = 0x00000000; /* maximum */ 1961 pcb->iflow.latency = 0xffffffff; /* don't care */ 1962 pcb->iflow.delay_variation = 0xffffffff; /* don't care */ 1963 1964 bcopy(&pcb->iflow, &pcb->oflow, sizeof(pcb->oflow)); 1965 1966 pcb->flush_timo = NG_L2CAP_FLUSH_TIMO_DEFAULT; 1967 pcb->link_timo = NG_L2CAP_LINK_TIMO_DEFAULT; 1968 1969 /* 1970 * XXX Mark PCB mutex as DUPOK to prevent "duplicated lock of 1971 * the same type" message. When accepting new L2CAP connection 1972 * ng_btsocket_l2cap_process_l2ca_con_ind() holds both PCB mutexes 1973 * for "old" (accepting) PCB and "new" (created) PCB. 1974 */ 1975 1976 mtx_init(&pcb->pcb_mtx, "btsocks_l2cap_pcb_mtx", NULL, 1977 MTX_DEF|MTX_DUPOK); 1978 callout_init_mtx(&pcb->timo, &pcb->pcb_mtx, 0); 1979 1980 /* 1981 * Add the PCB to the list 1982 * 1983 * XXX FIXME VERY IMPORTANT! 1984 * 1985 * This is totally FUBAR. We could get here in two cases: 1986 * 1987 * 1) When user calls socket() 1988 * 2) When we need to accept new incomming connection and call 1989 * sonewconn() 1990 * 1991 * In the first case we must acquire ng_btsocket_l2cap_sockets_mtx. 1992 * In the second case we hold ng_btsocket_l2cap_sockets_mtx already. 1993 * So we now need to distinguish between these cases. From reading 1994 * /sys/kern/uipc_socket.c we can find out that sonewconn() calls 1995 * pru_attach with proto == 0 and td == NULL. For now use this fact 1996 * to figure out if we were called from socket() or from sonewconn(). 1997 */ 1998 1999 if (td != NULL) 2000 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 2001 else 2002 mtx_assert(&ng_btsocket_l2cap_sockets_mtx, MA_OWNED); 2003 2004 /* Set PCB token. Use ng_btsocket_l2cap_sockets_mtx for protection */ 2005 if (++ token == 0) 2006 token ++; 2007 2008 pcb->token = token; 2009 2010 LIST_INSERT_HEAD(&ng_btsocket_l2cap_sockets, pcb, next); 2011 2012 if (td != NULL) 2013 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 2014 2015 return (0); 2016 } /* ng_btsocket_l2cap_attach */ 2017 2018 /* 2019 * Bind socket 2020 */ 2021 2022 int 2023 ng_btsocket_l2cap_bind(struct socket *so, struct sockaddr *nam, 2024 struct thread *td) 2025 { 2026 ng_btsocket_l2cap_pcb_t *pcb = NULL; 2027 struct sockaddr_l2cap *sa = (struct sockaddr_l2cap *) nam; 2028 int psm, error = 0; 2029 2030 if (ng_btsocket_l2cap_node == NULL) 2031 return (EINVAL); 2032 2033 /* Verify address */ 2034 if (sa == NULL) 2035 return (EINVAL); 2036 if (sa->l2cap_family != AF_BLUETOOTH) 2037 return (EAFNOSUPPORT); 2038 if (sa->l2cap_len != sizeof(*sa)) 2039 return (EINVAL); 2040 2041 psm = le16toh(sa->l2cap_psm); 2042 2043 /* 2044 * Check if other socket has this address already (look for exact 2045 * match PSM and bdaddr) and assign socket address if it's available. 2046 * 2047 * Note: socket can be bound to ANY PSM (zero) thus allowing several 2048 * channels with the same PSM between the same pair of BD_ADDR'es. 2049 */ 2050 2051 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 2052 2053 LIST_FOREACH(pcb, &ng_btsocket_l2cap_sockets, next) 2054 if (psm != 0 && psm == pcb->psm && 2055 bcmp(&pcb->src, &sa->l2cap_bdaddr, sizeof(bdaddr_t)) == 0) 2056 break; 2057 2058 if (pcb == NULL) { 2059 /* Set socket address */ 2060 pcb = so2l2cap_pcb(so); 2061 if (pcb != NULL) { 2062 bcopy(&sa->l2cap_bdaddr, &pcb->src, sizeof(pcb->src)); 2063 pcb->psm = psm; 2064 } else 2065 error = EINVAL; 2066 } else 2067 error = EADDRINUSE; 2068 2069 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 2070 2071 return (error); 2072 } /* ng_btsocket_l2cap_bind */ 2073 2074 /* 2075 * Connect socket 2076 */ 2077 2078 int 2079 ng_btsocket_l2cap_connect(struct socket *so, struct sockaddr *nam, 2080 struct thread *td) 2081 { 2082 ng_btsocket_l2cap_pcb_t *pcb = so2l2cap_pcb(so); 2083 struct sockaddr_l2cap *sa = (struct sockaddr_l2cap *) nam; 2084 ng_btsocket_l2cap_rtentry_t *rt = NULL; 2085 int have_src, error = 0; 2086 2087 /* Check socket */ 2088 if (pcb == NULL) 2089 return (EINVAL); 2090 if (ng_btsocket_l2cap_node == NULL) 2091 return (EINVAL); 2092 if (pcb->state == NG_BTSOCKET_L2CAP_CONNECTING) 2093 return (EINPROGRESS); 2094 2095 /* Verify address */ 2096 if (sa == NULL) 2097 return (EINVAL); 2098 if (sa->l2cap_family != AF_BLUETOOTH) 2099 return (EAFNOSUPPORT); 2100 if (sa->l2cap_len != sizeof(*sa)) 2101 return (EINVAL); 2102 if (sa->l2cap_psm == 0 || 2103 bcmp(&sa->l2cap_bdaddr, NG_HCI_BDADDR_ANY, sizeof(bdaddr_t)) == 0) 2104 return (EDESTADDRREQ); 2105 if (pcb->psm != 0 && pcb->psm != le16toh(sa->l2cap_psm)) 2106 return (EINVAL); 2107 2108 /* 2109 * Routing. Socket should be bound to some source address. The source 2110 * address can be ANY. Destination address must be set and it must not 2111 * be ANY. If source address is ANY then find first rtentry that has 2112 * src != dst. 2113 */ 2114 2115 mtx_lock(&ng_btsocket_l2cap_rt_mtx); 2116 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 2117 mtx_lock(&pcb->pcb_mtx); 2118 2119 /* Send destination address and PSM */ 2120 bcopy(&sa->l2cap_bdaddr, &pcb->dst, sizeof(pcb->dst)); 2121 pcb->psm = le16toh(sa->l2cap_psm); 2122 2123 pcb->rt = NULL; 2124 have_src = bcmp(&pcb->src, NG_HCI_BDADDR_ANY, sizeof(pcb->src)); 2125 2126 LIST_FOREACH(rt, &ng_btsocket_l2cap_rt, next) { 2127 if (rt->hook == NULL || NG_HOOK_NOT_VALID(rt->hook)) 2128 continue; 2129 2130 /* Match src and dst */ 2131 if (have_src) { 2132 if (bcmp(&pcb->src, &rt->src, sizeof(rt->src)) == 0) 2133 break; 2134 } else { 2135 if (bcmp(&pcb->dst, &rt->src, sizeof(rt->src)) != 0) 2136 break; 2137 } 2138 } 2139 2140 if (rt != NULL) { 2141 pcb->rt = rt; 2142 2143 if (!have_src) 2144 bcopy(&rt->src, &pcb->src, sizeof(pcb->src)); 2145 } else 2146 error = EHOSTUNREACH; 2147 2148 /* 2149 * Send L2CA_Connect request 2150 */ 2151 2152 if (error == 0) { 2153 error = ng_btsocket_l2cap_send_l2ca_con_req(pcb); 2154 if (error == 0) { 2155 pcb->flags |= NG_BTSOCKET_L2CAP_CLIENT; 2156 pcb->state = NG_BTSOCKET_L2CAP_CONNECTING; 2157 soisconnecting(pcb->so); 2158 2159 ng_btsocket_l2cap_timeout(pcb); 2160 } 2161 } 2162 2163 mtx_unlock(&pcb->pcb_mtx); 2164 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 2165 mtx_unlock(&ng_btsocket_l2cap_rt_mtx); 2166 2167 return (error); 2168 } /* ng_btsocket_l2cap_connect */ 2169 2170 /* 2171 * Process ioctl's calls on socket 2172 */ 2173 2174 int 2175 ng_btsocket_l2cap_control(struct socket *so, u_long cmd, caddr_t data, 2176 struct ifnet *ifp, struct thread *td) 2177 { 2178 return (EINVAL); 2179 } /* ng_btsocket_l2cap_control */ 2180 2181 /* 2182 * Process getsockopt/setsockopt system calls 2183 */ 2184 2185 int 2186 ng_btsocket_l2cap_ctloutput(struct socket *so, struct sockopt *sopt) 2187 { 2188 ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so); 2189 int error = 0; 2190 ng_l2cap_cfg_opt_val_t v; 2191 2192 if (pcb == NULL) 2193 return (EINVAL); 2194 if (ng_btsocket_l2cap_node == NULL) 2195 return (EINVAL); 2196 2197 if (sopt->sopt_level != SOL_L2CAP) 2198 return (0); 2199 2200 mtx_lock(&pcb->pcb_mtx); 2201 2202 switch (sopt->sopt_dir) { 2203 case SOPT_GET: 2204 switch (sopt->sopt_name) { 2205 case SO_L2CAP_IMTU: /* get incoming MTU */ 2206 error = sooptcopyout(sopt, &pcb->imtu, 2207 sizeof(pcb->imtu)); 2208 break; 2209 2210 case SO_L2CAP_OMTU: /* get outgoing (peer incoming) MTU */ 2211 error = sooptcopyout(sopt, &pcb->omtu, 2212 sizeof(pcb->omtu)); 2213 break; 2214 2215 case SO_L2CAP_IFLOW: /* get incoming flow spec. */ 2216 error = sooptcopyout(sopt, &pcb->iflow, 2217 sizeof(pcb->iflow)); 2218 break; 2219 2220 case SO_L2CAP_OFLOW: /* get outgoing flow spec. */ 2221 error = sooptcopyout(sopt, &pcb->oflow, 2222 sizeof(pcb->oflow)); 2223 break; 2224 2225 case SO_L2CAP_FLUSH: /* get flush timeout */ 2226 error = sooptcopyout(sopt, &pcb->flush_timo, 2227 sizeof(pcb->flush_timo)); 2228 break; 2229 2230 default: 2231 error = ENOPROTOOPT; 2232 break; 2233 } 2234 break; 2235 2236 case SOPT_SET: 2237 /* 2238 * XXX 2239 * We do not allow to change these parameters while socket is 2240 * connected or we are in the process of creating a connection. 2241 * May be this should indicate re-configuration of the open 2242 * channel? 2243 */ 2244 2245 if (pcb->state != NG_BTSOCKET_L2CAP_CLOSED) { 2246 error = EACCES; 2247 break; 2248 } 2249 2250 switch (sopt->sopt_name) { 2251 case SO_L2CAP_IMTU: /* set incoming MTU */ 2252 error = sooptcopyin(sopt, &v, sizeof(v), sizeof(v.mtu)); 2253 if (error == 0) 2254 pcb->imtu = v.mtu; 2255 break; 2256 2257 case SO_L2CAP_OFLOW: /* set outgoing flow spec. */ 2258 error = sooptcopyin(sopt, &v, sizeof(v),sizeof(v.flow)); 2259 if (error == 0) 2260 bcopy(&v.flow, &pcb->oflow, sizeof(pcb->oflow)); 2261 break; 2262 2263 case SO_L2CAP_FLUSH: /* set flush timeout */ 2264 error = sooptcopyin(sopt, &v, sizeof(v), 2265 sizeof(v.flush_timo)); 2266 if (error == 0) 2267 pcb->flush_timo = v.flush_timo; 2268 break; 2269 2270 default: 2271 error = ENOPROTOOPT; 2272 break; 2273 } 2274 break; 2275 2276 default: 2277 error = EINVAL; 2278 break; 2279 } 2280 2281 mtx_unlock(&pcb->pcb_mtx); 2282 2283 return (error); 2284 } /* ng_btsocket_l2cap_ctloutput */ 2285 2286 /* 2287 * Detach and destroy socket 2288 */ 2289 2290 void 2291 ng_btsocket_l2cap_detach(struct socket *so) 2292 { 2293 ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so); 2294 2295 KASSERT(pcb != NULL, ("ng_btsocket_l2cap_detach: pcb == NULL")); 2296 2297 if (ng_btsocket_l2cap_node == NULL) 2298 return; 2299 2300 mtx_lock(&ng_btsocket_l2cap_sockets_mtx); 2301 mtx_lock(&pcb->pcb_mtx); 2302 2303 /* XXX what to do with pending request? */ 2304 if (pcb->flags & NG_BTSOCKET_L2CAP_TIMO) 2305 ng_btsocket_l2cap_untimeout(pcb); 2306 2307 if (pcb->state != NG_BTSOCKET_L2CAP_CLOSED && 2308 pcb->state != NG_BTSOCKET_L2CAP_DISCONNECTING) 2309 /* Send disconnect request with "zero" token */ 2310 ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb); 2311 2312 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 2313 2314 LIST_REMOVE(pcb, next); 2315 2316 mtx_unlock(&pcb->pcb_mtx); 2317 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx); 2318 2319 mtx_destroy(&pcb->pcb_mtx); 2320 bzero(pcb, sizeof(*pcb)); 2321 free(pcb, M_NETGRAPH_BTSOCKET_L2CAP); 2322 2323 soisdisconnected(so); 2324 so->so_pcb = NULL; 2325 } /* ng_btsocket_l2cap_detach */ 2326 2327 /* 2328 * Disconnect socket 2329 */ 2330 2331 int 2332 ng_btsocket_l2cap_disconnect(struct socket *so) 2333 { 2334 ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so); 2335 int error = 0; 2336 2337 if (pcb == NULL) 2338 return (EINVAL); 2339 if (ng_btsocket_l2cap_node == NULL) 2340 return (EINVAL); 2341 2342 mtx_lock(&pcb->pcb_mtx); 2343 2344 if (pcb->state == NG_BTSOCKET_L2CAP_DISCONNECTING) { 2345 mtx_unlock(&pcb->pcb_mtx); 2346 return (EINPROGRESS); 2347 } 2348 2349 if (pcb->state != NG_BTSOCKET_L2CAP_CLOSED) { 2350 /* XXX FIXME what to do with pending request? */ 2351 if (pcb->flags & NG_BTSOCKET_L2CAP_TIMO) 2352 ng_btsocket_l2cap_untimeout(pcb); 2353 2354 error = ng_btsocket_l2cap_send_l2ca_discon_req(pcb->token, pcb); 2355 if (error == 0) { 2356 pcb->state = NG_BTSOCKET_L2CAP_DISCONNECTING; 2357 soisdisconnecting(so); 2358 2359 ng_btsocket_l2cap_timeout(pcb); 2360 } 2361 2362 /* XXX FIXME what to do if error != 0 */ 2363 } 2364 2365 mtx_unlock(&pcb->pcb_mtx); 2366 2367 return (error); 2368 } /* ng_btsocket_l2cap_disconnect */ 2369 2370 /* 2371 * Listen on socket 2372 */ 2373 2374 int 2375 ng_btsocket_l2cap_listen(struct socket *so, int backlog, struct thread *td) 2376 { 2377 ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so); 2378 int error; 2379 2380 SOCK_LOCK(so); 2381 error = solisten_proto_check(so); 2382 if (error != 0) 2383 goto out; 2384 if (pcb == NULL) { 2385 error = EINVAL; 2386 goto out; 2387 } 2388 if (ng_btsocket_l2cap_node == NULL) { 2389 error = EINVAL; 2390 goto out; 2391 } 2392 if (pcb->psm == 0) { 2393 error = EADDRNOTAVAIL; 2394 goto out; 2395 } 2396 solisten_proto(so, backlog); 2397 out: 2398 SOCK_UNLOCK(so); 2399 return (error); 2400 } /* ng_btsocket_listen */ 2401 2402 /* 2403 * Get peer address 2404 */ 2405 2406 int 2407 ng_btsocket_l2cap_peeraddr(struct socket *so, struct sockaddr **nam) 2408 { 2409 ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so); 2410 struct sockaddr_l2cap sa; 2411 2412 if (pcb == NULL) 2413 return (EINVAL); 2414 if (ng_btsocket_l2cap_node == NULL) 2415 return (EINVAL); 2416 2417 bcopy(&pcb->dst, &sa.l2cap_bdaddr, sizeof(sa.l2cap_bdaddr)); 2418 sa.l2cap_psm = htole16(pcb->psm); 2419 sa.l2cap_len = sizeof(sa); 2420 sa.l2cap_family = AF_BLUETOOTH; 2421 2422 *nam = sodupsockaddr((struct sockaddr *) &sa, M_NOWAIT); 2423 2424 return ((*nam == NULL)? ENOMEM : 0); 2425 } /* ng_btsocket_l2cap_peeraddr */ 2426 2427 /* 2428 * Send data to socket 2429 */ 2430 2431 int 2432 ng_btsocket_l2cap_send(struct socket *so, int flags, struct mbuf *m, 2433 struct sockaddr *nam, struct mbuf *control, struct thread *td) 2434 { 2435 ng_btsocket_l2cap_pcb_t *pcb = so2l2cap_pcb(so); 2436 int error = 0; 2437 2438 if (ng_btsocket_l2cap_node == NULL) { 2439 error = ENETDOWN; 2440 goto drop; 2441 } 2442 2443 /* Check socket and input */ 2444 if (pcb == NULL || m == NULL || control != NULL) { 2445 error = EINVAL; 2446 goto drop; 2447 } 2448 2449 mtx_lock(&pcb->pcb_mtx); 2450 2451 /* Make sure socket is connected */ 2452 if (pcb->state != NG_BTSOCKET_L2CAP_OPEN) { 2453 mtx_unlock(&pcb->pcb_mtx); 2454 error = ENOTCONN; 2455 goto drop; 2456 } 2457 2458 /* Check route */ 2459 if (pcb->rt == NULL || 2460 pcb->rt->hook == NULL || NG_HOOK_NOT_VALID(pcb->rt->hook)) { 2461 mtx_unlock(&pcb->pcb_mtx); 2462 error = ENETDOWN; 2463 goto drop; 2464 } 2465 2466 /* Check packet size agains outgoing (peer's incoming) MTU) */ 2467 if (m->m_pkthdr.len > pcb->omtu) { 2468 NG_BTSOCKET_L2CAP_ERR( 2469 "%s: Packet too big, len=%d, omtu=%d\n", __func__, m->m_pkthdr.len, pcb->omtu); 2470 2471 mtx_unlock(&pcb->pcb_mtx); 2472 error = EMSGSIZE; 2473 goto drop; 2474 } 2475 2476 /* 2477 * First put packet on socket send queue. Then check if we have 2478 * pending timeout. If we do not have timeout then we must send 2479 * packet and schedule timeout. Otherwise do nothing and wait for 2480 * L2CA_WRITE_RSP. 2481 */ 2482 2483 sbappendrecord(&pcb->so->so_snd, m); 2484 m = NULL; 2485 2486 if (!(pcb->flags & NG_BTSOCKET_L2CAP_TIMO)) { 2487 error = ng_btsocket_l2cap_send2(pcb); 2488 if (error == 0) 2489 ng_btsocket_l2cap_timeout(pcb); 2490 else 2491 sbdroprecord(&pcb->so->so_snd); /* XXX */ 2492 } 2493 2494 mtx_unlock(&pcb->pcb_mtx); 2495 drop: 2496 NG_FREE_M(m); /* checks for != NULL */ 2497 NG_FREE_M(control); 2498 2499 return (error); 2500 } /* ng_btsocket_l2cap_send */ 2501 2502 /* 2503 * Send first packet in the socket queue to the L2CAP layer 2504 */ 2505 2506 static int 2507 ng_btsocket_l2cap_send2(ng_btsocket_l2cap_pcb_p pcb) 2508 { 2509 struct mbuf *m = NULL; 2510 ng_l2cap_l2ca_hdr_t *hdr = NULL; 2511 int error = 0; 2512 2513 mtx_assert(&pcb->pcb_mtx, MA_OWNED); 2514 2515 if (sbavail(&pcb->so->so_snd) == 0) 2516 return (EINVAL); /* XXX */ 2517 2518 m = m_dup(pcb->so->so_snd.sb_mb, M_NOWAIT); 2519 if (m == NULL) 2520 return (ENOBUFS); 2521 2522 /* Create L2CA packet header */ 2523 M_PREPEND(m, sizeof(*hdr), M_NOWAIT); 2524 if (m != NULL) 2525 if (m->m_len < sizeof(*hdr)) 2526 m = m_pullup(m, sizeof(*hdr)); 2527 2528 if (m == NULL) { 2529 NG_BTSOCKET_L2CAP_ERR( 2530 "%s: Failed to create L2CA packet header\n", __func__); 2531 2532 return (ENOBUFS); 2533 } 2534 2535 hdr = mtod(m, ng_l2cap_l2ca_hdr_t *); 2536 hdr->token = pcb->token; 2537 hdr->length = m->m_pkthdr.len - sizeof(*hdr); 2538 hdr->lcid = pcb->cid; 2539 2540 NG_BTSOCKET_L2CAP_INFO( 2541 "%s: Sending packet: len=%d, length=%d, lcid=%d, token=%d, state=%d\n", 2542 __func__, m->m_pkthdr.len, hdr->length, hdr->lcid, 2543 hdr->token, pcb->state); 2544 2545 /* 2546 * If we got here than we have successfuly creates new L2CAP 2547 * data packet and now we can send it to the L2CAP layer 2548 */ 2549 2550 NG_SEND_DATA_ONLY(error, pcb->rt->hook, m); 2551 2552 return (error); 2553 } /* ng_btsocket_l2cap_send2 */ 2554 2555 /* 2556 * Get socket address 2557 */ 2558 2559 int 2560 ng_btsocket_l2cap_sockaddr(struct socket *so, struct sockaddr **nam) 2561 { 2562 ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so); 2563 struct sockaddr_l2cap sa; 2564 2565 if (pcb == NULL) 2566 return (EINVAL); 2567 if (ng_btsocket_l2cap_node == NULL) 2568 return (EINVAL); 2569 2570 bcopy(&pcb->src, &sa.l2cap_bdaddr, sizeof(sa.l2cap_bdaddr)); 2571 sa.l2cap_psm = htole16(pcb->psm); 2572 sa.l2cap_len = sizeof(sa); 2573 sa.l2cap_family = AF_BLUETOOTH; 2574 2575 *nam = sodupsockaddr((struct sockaddr *) &sa, M_NOWAIT); 2576 2577 return ((*nam == NULL)? ENOMEM : 0); 2578 } /* ng_btsocket_l2cap_sockaddr */ 2579 2580 /***************************************************************************** 2581 ***************************************************************************** 2582 ** Misc. functions 2583 ***************************************************************************** 2584 *****************************************************************************/ 2585 2586 /* 2587 * Look for the socket that listens on given PSM and bdaddr. Returns exact or 2588 * close match (if any). Caller must hold ng_btsocket_l2cap_sockets_mtx. 2589 */ 2590 2591 static ng_btsocket_l2cap_pcb_p 2592 ng_btsocket_l2cap_pcb_by_addr(bdaddr_p bdaddr, int psm) 2593 { 2594 ng_btsocket_l2cap_pcb_p p = NULL, p1 = NULL; 2595 2596 mtx_assert(&ng_btsocket_l2cap_sockets_mtx, MA_OWNED); 2597 2598 LIST_FOREACH(p, &ng_btsocket_l2cap_sockets, next) { 2599 if (p->so == NULL || !(p->so->so_options & SO_ACCEPTCONN) || 2600 p->psm != psm) 2601 continue; 2602 2603 if (bcmp(&p->src, bdaddr, sizeof(p->src)) == 0) 2604 break; 2605 2606 if (bcmp(&p->src, NG_HCI_BDADDR_ANY, sizeof(p->src)) == 0) 2607 p1 = p; 2608 } 2609 2610 return ((p != NULL)? p : p1); 2611 } /* ng_btsocket_l2cap_pcb_by_addr */ 2612 2613 /* 2614 * Look for the socket that has given token. 2615 * Caller must hold ng_btsocket_l2cap_sockets_mtx. 2616 */ 2617 2618 static ng_btsocket_l2cap_pcb_p 2619 ng_btsocket_l2cap_pcb_by_token(u_int32_t token) 2620 { 2621 ng_btsocket_l2cap_pcb_p p = NULL; 2622 2623 if (token == 0) 2624 return (NULL); 2625 2626 mtx_assert(&ng_btsocket_l2cap_sockets_mtx, MA_OWNED); 2627 2628 LIST_FOREACH(p, &ng_btsocket_l2cap_sockets, next) 2629 if (p->token == token) 2630 break; 2631 2632 return (p); 2633 } /* ng_btsocket_l2cap_pcb_by_token */ 2634 2635 /* 2636 * Look for the socket that assigned to given source address and channel ID. 2637 * Caller must hold ng_btsocket_l2cap_sockets_mtx 2638 */ 2639 2640 static ng_btsocket_l2cap_pcb_p 2641 ng_btsocket_l2cap_pcb_by_cid(bdaddr_p src, int cid) 2642 { 2643 ng_btsocket_l2cap_pcb_p p = NULL; 2644 2645 mtx_assert(&ng_btsocket_l2cap_sockets_mtx, MA_OWNED); 2646 2647 LIST_FOREACH(p, &ng_btsocket_l2cap_sockets, next) 2648 if (p->cid == cid && bcmp(src, &p->src, sizeof(p->src)) == 0) 2649 break; 2650 2651 return (p); 2652 } /* ng_btsocket_l2cap_pcb_by_cid */ 2653 2654 /* 2655 * Set timeout on socket 2656 */ 2657 2658 static void 2659 ng_btsocket_l2cap_timeout(ng_btsocket_l2cap_pcb_p pcb) 2660 { 2661 mtx_assert(&pcb->pcb_mtx, MA_OWNED); 2662 2663 if (!(pcb->flags & NG_BTSOCKET_L2CAP_TIMO)) { 2664 pcb->flags |= NG_BTSOCKET_L2CAP_TIMO; 2665 callout_reset(&pcb->timo, bluetooth_l2cap_ertx_timeout(), 2666 ng_btsocket_l2cap_process_timeout, pcb); 2667 } else 2668 KASSERT(0, 2669 ("%s: Duplicated socket timeout?!\n", __func__)); 2670 } /* ng_btsocket_l2cap_timeout */ 2671 2672 /* 2673 * Unset timeout on socket 2674 */ 2675 2676 static void 2677 ng_btsocket_l2cap_untimeout(ng_btsocket_l2cap_pcb_p pcb) 2678 { 2679 mtx_assert(&pcb->pcb_mtx, MA_OWNED); 2680 2681 if (pcb->flags & NG_BTSOCKET_L2CAP_TIMO) { 2682 callout_stop(&pcb->timo); 2683 pcb->flags &= ~NG_BTSOCKET_L2CAP_TIMO; 2684 } else 2685 KASSERT(0, 2686 ("%s: No socket timeout?!\n", __func__)); 2687 } /* ng_btsocket_l2cap_untimeout */ 2688 2689 /* 2690 * Process timeout on socket 2691 */ 2692 2693 static void 2694 ng_btsocket_l2cap_process_timeout(void *xpcb) 2695 { 2696 ng_btsocket_l2cap_pcb_p pcb = (ng_btsocket_l2cap_pcb_p) xpcb; 2697 2698 mtx_assert(&pcb->pcb_mtx, MA_OWNED); 2699 2700 pcb->flags &= ~NG_BTSOCKET_L2CAP_TIMO; 2701 pcb->so->so_error = ETIMEDOUT; 2702 2703 switch (pcb->state) { 2704 case NG_BTSOCKET_L2CAP_CONNECTING: 2705 case NG_BTSOCKET_L2CAP_CONFIGURING: 2706 /* Send disconnect request with "zero" token */ 2707 if (pcb->cid != 0) 2708 ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb); 2709 2710 /* ... and close the socket */ 2711 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 2712 soisdisconnected(pcb->so); 2713 break; 2714 2715 case NG_BTSOCKET_L2CAP_OPEN: 2716 /* Send timeout - drop packet and wakeup sender */ 2717 sbdroprecord(&pcb->so->so_snd); 2718 sowwakeup(pcb->so); 2719 break; 2720 2721 case NG_BTSOCKET_L2CAP_DISCONNECTING: 2722 /* Disconnect timeout - disconnect the socket anyway */ 2723 pcb->state = NG_BTSOCKET_L2CAP_CLOSED; 2724 soisdisconnected(pcb->so); 2725 break; 2726 2727 default: 2728 NG_BTSOCKET_L2CAP_ERR( 2729 "%s: Invalid socket state=%d\n", __func__, pcb->state); 2730 break; 2731 } 2732 } /* ng_btsocket_l2cap_process_timeout */ 2733 2734 /* 2735 * Translate HCI/L2CAP error code into "errno" code 2736 * XXX Note: Some L2CAP and HCI error codes have the same value, but 2737 * different meaning 2738 */ 2739 2740 static int 2741 ng_btsocket_l2cap_result2errno(int result) 2742 { 2743 switch (result) { 2744 case 0x00: /* No error */ 2745 return (0); 2746 2747 case 0x01: /* Unknown HCI command */ 2748 return (ENODEV); 2749 2750 case 0x02: /* No connection */ 2751 return (ENOTCONN); 2752 2753 case 0x03: /* Hardware failure */ 2754 return (EIO); 2755 2756 case 0x04: /* Page timeout */ 2757 return (EHOSTDOWN); 2758 2759 case 0x05: /* Authentication failure */ 2760 case 0x06: /* Key missing */ 2761 case 0x18: /* Pairing not allowed */ 2762 case 0x21: /* Role change not allowed */ 2763 case 0x24: /* LMP PSU not allowed */ 2764 case 0x25: /* Encryption mode not acceptable */ 2765 case 0x26: /* Unit key used */ 2766 return (EACCES); 2767 2768 case 0x07: /* Memory full */ 2769 return (ENOMEM); 2770 2771 case 0x08: /* Connection timeout */ 2772 case 0x10: /* Host timeout */ 2773 case 0x22: /* LMP response timeout */ 2774 case 0xee: /* HCI timeout */ 2775 case 0xeeee: /* L2CAP timeout */ 2776 return (ETIMEDOUT); 2777 2778 case 0x09: /* Max number of connections */ 2779 case 0x0a: /* Max number of SCO connections to a unit */ 2780 return (EMLINK); 2781 2782 case 0x0b: /* ACL connection already exists */ 2783 return (EEXIST); 2784 2785 case 0x0c: /* Command disallowed */ 2786 return (EBUSY); 2787 2788 case 0x0d: /* Host rejected due to limited resources */ 2789 case 0x0e: /* Host rejected due to securiity reasons */ 2790 case 0x0f: /* Host rejected due to remote unit is a personal unit */ 2791 case 0x1b: /* SCO offset rejected */ 2792 case 0x1c: /* SCO interval rejected */ 2793 case 0x1d: /* SCO air mode rejected */ 2794 return (ECONNREFUSED); 2795 2796 case 0x11: /* Unsupported feature or parameter value */ 2797 case 0x19: /* Unknown LMP PDU */ 2798 case 0x1a: /* Unsupported remote feature */ 2799 case 0x20: /* Unsupported LMP parameter value */ 2800 case 0x27: /* QoS is not supported */ 2801 case 0x29: /* Paring with unit key not supported */ 2802 return (EOPNOTSUPP); 2803 2804 case 0x12: /* Invalid HCI command parameter */ 2805 case 0x1e: /* Invalid LMP parameters */ 2806 return (EINVAL); 2807 2808 case 0x13: /* Other end terminated connection: User ended connection */ 2809 case 0x14: /* Other end terminated connection: Low resources */ 2810 case 0x15: /* Other end terminated connection: About to power off */ 2811 return (ECONNRESET); 2812 2813 case 0x16: /* Connection terminated by local host */ 2814 return (ECONNABORTED); 2815 2816 #if 0 /* XXX not yet */ 2817 case 0x17: /* Repeated attempts */ 2818 case 0x1f: /* Unspecified error */ 2819 case 0x23: /* LMP error transaction collision */ 2820 case 0x28: /* Instant passed */ 2821 #endif 2822 } 2823 2824 return (ENOSYS); 2825 } /* ng_btsocket_l2cap_result2errno */ 2826 2827