1 /* 2 * ng_hci_misc.c 3 */ 4 5 /*- 6 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 7 * 8 * Copyright (c) Maksim Yevmenkin <m_evmenkin@yahoo.com> 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $Id: ng_hci_misc.c,v 1.5 2003/09/08 18:57:51 max Exp $ 33 * $FreeBSD$ 34 */ 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/malloc.h> 40 #include <sys/mbuf.h> 41 #include <sys/queue.h> 42 #include <netgraph/ng_message.h> 43 #include <netgraph/netgraph.h> 44 #include <netgraph/bluetooth/include/ng_bluetooth.h> 45 #include <netgraph/bluetooth/include/ng_hci.h> 46 #include <netgraph/bluetooth/hci/ng_hci_var.h> 47 #include <netgraph/bluetooth/hci/ng_hci_cmds.h> 48 #include <netgraph/bluetooth/hci/ng_hci_evnt.h> 49 #include <netgraph/bluetooth/hci/ng_hci_ulpi.h> 50 #include <netgraph/bluetooth/hci/ng_hci_misc.h> 51 52 /****************************************************************************** 53 ****************************************************************************** 54 ** Utility routines 55 ****************************************************************************** 56 ******************************************************************************/ 57 58 /* 59 * Give packet to RAW hook 60 * Assumes input mbuf is read only. 61 */ 62 63 void 64 ng_hci_mtap(ng_hci_unit_p unit, struct mbuf *m0) 65 { 66 struct mbuf *m = NULL; 67 int error = 0; 68 69 if (unit->raw != NULL && NG_HOOK_IS_VALID(unit->raw)) { 70 m = m_dup(m0, M_NOWAIT); 71 if (m != NULL) 72 NG_SEND_DATA_ONLY(error, unit->raw, m); 73 74 if (error != 0) 75 NG_HCI_INFO( 76 "%s: %s - Could not forward packet, error=%d\n", 77 __func__, NG_NODE_NAME(unit->node), error); 78 } 79 } /* ng_hci_mtap */ 80 81 /* 82 * Send notification to the upper layer's 83 */ 84 85 void 86 ng_hci_node_is_up(node_p node, hook_p hook, void *arg1, int arg2) 87 { 88 ng_hci_unit_p unit = NULL; 89 struct ng_mesg *msg = NULL; 90 ng_hci_node_up_ep *ep = NULL; 91 int error; 92 93 if (node == NULL || NG_NODE_NOT_VALID(node) || 94 hook == NULL || NG_HOOK_NOT_VALID(hook)) 95 return; 96 97 unit = (ng_hci_unit_p) NG_NODE_PRIVATE(node); 98 if ((unit->state & NG_HCI_UNIT_READY) != NG_HCI_UNIT_READY) 99 return; 100 101 if (hook != unit->acl && hook != unit->sco) 102 return; 103 104 NG_MKMESSAGE(msg,NGM_HCI_COOKIE,NGM_HCI_NODE_UP,sizeof(*ep),M_NOWAIT); 105 if (msg != NULL) { 106 ep = (ng_hci_node_up_ep *)(msg->data); 107 108 if (hook == unit->acl) { 109 NG_HCI_BUFF_ACL_SIZE(unit->buffer, ep->pkt_size); 110 NG_HCI_BUFF_ACL_TOTAL(unit->buffer, ep->num_pkts); 111 } else { 112 NG_HCI_BUFF_SCO_SIZE(unit->buffer, ep->pkt_size); 113 NG_HCI_BUFF_SCO_TOTAL(unit->buffer, ep->num_pkts); 114 } 115 116 bcopy(&unit->bdaddr, &ep->bdaddr, sizeof(ep->bdaddr)); 117 118 NG_SEND_MSG_HOOK(error, node, msg, hook, 0); 119 } else 120 error = ENOMEM; 121 122 if (error != 0) 123 NG_HCI_INFO( 124 "%s: %s - failed to send NODE_UP message to hook \"%s\", error=%d\n", 125 __func__, NG_NODE_NAME(unit->node), 126 NG_HOOK_NAME(hook), error); 127 } /* ng_hci_node_is_up */ 128 129 /* 130 * Clean unit (helper) 131 */ 132 133 void 134 ng_hci_unit_clean(ng_hci_unit_p unit, int reason) 135 { 136 int size; 137 138 /* Drain command queue */ 139 if (unit->state & NG_HCI_UNIT_COMMAND_PENDING) 140 ng_hci_command_untimeout(unit); 141 142 NG_BT_MBUFQ_DRAIN(&unit->cmdq); 143 NG_HCI_BUFF_CMD_SET(unit->buffer, 1); 144 145 /* Clean up connection list */ 146 while (!LIST_EMPTY(&unit->con_list)) { 147 ng_hci_unit_con_p con = LIST_FIRST(&unit->con_list); 148 149 /* Remove all timeouts (if any) */ 150 if (con->flags & NG_HCI_CON_TIMEOUT_PENDING) 151 ng_hci_con_untimeout(con); 152 153 /* 154 * Notify upper layer protocol and destroy connection 155 * descriptor. Do not really care about the result. 156 */ 157 158 ng_hci_lp_discon_ind(con, reason); 159 ng_hci_free_con(con); 160 } 161 162 NG_HCI_BUFF_ACL_TOTAL(unit->buffer, size); 163 NG_HCI_BUFF_ACL_FREE(unit->buffer, size); 164 165 NG_HCI_BUFF_SCO_TOTAL(unit->buffer, size); 166 NG_HCI_BUFF_SCO_FREE(unit->buffer, size); 167 168 /* Clean up neighbors list */ 169 ng_hci_flush_neighbor_cache(unit); 170 } /* ng_hci_unit_clean */ 171 172 /* 173 * Allocate and link new unit neighbor cache entry 174 */ 175 176 ng_hci_neighbor_p 177 ng_hci_new_neighbor(ng_hci_unit_p unit) 178 { 179 ng_hci_neighbor_p n = NULL; 180 181 n = malloc(sizeof(*n), M_NETGRAPH_HCI, 182 M_NOWAIT | M_ZERO); 183 if (n != NULL) { 184 getmicrotime(&n->updated); 185 LIST_INSERT_HEAD(&unit->neighbors, n, next); 186 } 187 188 return (n); 189 } /* ng_hci_new_neighbor */ 190 191 /* 192 * Free unit neighbor cache entry 193 */ 194 195 void 196 ng_hci_free_neighbor(ng_hci_neighbor_p n) 197 { 198 LIST_REMOVE(n, next); 199 bzero(n, sizeof(*n)); 200 free(n, M_NETGRAPH_HCI); 201 } /* ng_hci_free_neighbor */ 202 203 /* 204 * Flush neighbor cache 205 */ 206 207 void 208 ng_hci_flush_neighbor_cache(ng_hci_unit_p unit) 209 { 210 while (!LIST_EMPTY(&unit->neighbors)) 211 ng_hci_free_neighbor(LIST_FIRST(&unit->neighbors)); 212 } /* ng_hci_flush_neighbor_cache */ 213 214 /* 215 * Lookup unit in neighbor cache 216 */ 217 218 ng_hci_neighbor_p 219 ng_hci_get_neighbor(ng_hci_unit_p unit, bdaddr_p bdaddr,int link_type) 220 { 221 ng_hci_neighbor_p n = NULL; 222 223 for (n = LIST_FIRST(&unit->neighbors); n != NULL; ) { 224 ng_hci_neighbor_p nn = LIST_NEXT(n, next); 225 226 if (!ng_hci_neighbor_stale(n)) { 227 if (n->addrtype == link_type && 228 bcmp(&n->bdaddr, bdaddr, sizeof(*bdaddr)) == 0) 229 break; 230 } else 231 ng_hci_free_neighbor(n); /* remove old entry */ 232 233 n = nn; 234 } 235 236 return (n); 237 } /* ng_hci_get_neighbor */ 238 239 /* 240 * Check if neighbor entry is stale 241 */ 242 243 int 244 ng_hci_neighbor_stale(ng_hci_neighbor_p n) 245 { 246 struct timeval now; 247 248 getmicrotime(&now); 249 250 return (now.tv_sec - n->updated.tv_sec > bluetooth_hci_max_neighbor_age()); 251 } /* ng_hci_neighbor_stale */ 252 253 /* 254 * Allocate and link new connection descriptor 255 */ 256 257 ng_hci_unit_con_p 258 ng_hci_new_con(ng_hci_unit_p unit, int link_type) 259 { 260 ng_hci_unit_con_p con = NULL; 261 int num_pkts; 262 static int fake_con_handle = 0x0f00; 263 264 con = malloc(sizeof(*con), M_NETGRAPH_HCI, 265 M_NOWAIT | M_ZERO); 266 if (con != NULL) { 267 con->unit = unit; 268 con->state = NG_HCI_CON_CLOSED; 269 270 /* 271 * XXX 272 * 273 * Assign fake connection handle to the connection descriptor. 274 * Bluetooth specification marks 0x0f00 - 0x0fff connection 275 * handles as reserved. We need this fake connection handles 276 * for timeouts. Connection handle will be passed as argument 277 * to timeout so when timeout happens we can find the right 278 * connection descriptor. We can not pass pointers, because 279 * timeouts are external (to Netgraph) events and there might 280 * be a race when node/hook goes down and timeout event already 281 * went into node's queue 282 */ 283 284 con->con_handle = fake_con_handle ++; 285 if (fake_con_handle > 0x0fff) 286 fake_con_handle = 0x0f00; 287 288 con->link_type = link_type; 289 290 if (con->link_type != NG_HCI_LINK_SCO) 291 NG_HCI_BUFF_ACL_TOTAL(unit->buffer, num_pkts); 292 else 293 NG_HCI_BUFF_SCO_TOTAL(unit->buffer, num_pkts); 294 295 NG_BT_ITEMQ_INIT(&con->conq, num_pkts); 296 297 ng_callout_init(&con->con_timo); 298 299 LIST_INSERT_HEAD(&unit->con_list, con, next); 300 } 301 302 return (con); 303 } /* ng_hci_new_con */ 304 305 /* 306 * Free connection descriptor 307 */ 308 309 void 310 ng_hci_free_con(ng_hci_unit_con_p con) 311 { 312 LIST_REMOVE(con, next); 313 314 /* 315 * If we have pending packets then assume that Host Controller has 316 * flushed these packets and we can free them too 317 */ 318 319 if (con->link_type != NG_HCI_LINK_SCO) 320 NG_HCI_BUFF_ACL_FREE(con->unit->buffer, con->pending); 321 else 322 NG_HCI_BUFF_SCO_FREE(con->unit->buffer, con->pending); 323 324 NG_BT_ITEMQ_DESTROY(&con->conq); 325 326 bzero(con, sizeof(*con)); 327 free(con, M_NETGRAPH_HCI); 328 } /* ng_hci_free_con */ 329 330 /* 331 * Lookup connection for given unit and connection handle. 332 */ 333 334 ng_hci_unit_con_p 335 ng_hci_con_by_handle(ng_hci_unit_p unit, int con_handle) 336 { 337 ng_hci_unit_con_p con = NULL; 338 339 LIST_FOREACH(con, &unit->con_list, next) 340 if (con->con_handle == con_handle) 341 break; 342 343 return (con); 344 } /* ng_hci_con_by_handle */ 345 346 /* 347 * Lookup connection for given unit, link type and remove unit address 348 */ 349 350 ng_hci_unit_con_p 351 ng_hci_con_by_bdaddr(ng_hci_unit_p unit, bdaddr_p bdaddr, int link_type) 352 { 353 ng_hci_unit_con_p con = NULL; 354 355 LIST_FOREACH(con, &unit->con_list, next) 356 if (con->link_type == link_type && 357 bcmp(&con->bdaddr, bdaddr, sizeof(bdaddr_t)) == 0) 358 break; 359 360 return (con); 361 } /* ng_hci_con_by_bdaddr */ 362 363 /* 364 * Set HCI command timeout 365 * XXX FIXME: check return code from ng_callout 366 */ 367 368 int 369 ng_hci_command_timeout(ng_hci_unit_p unit) 370 { 371 if (unit->state & NG_HCI_UNIT_COMMAND_PENDING) 372 panic( 373 "%s: %s - Duplicated command timeout!\n", __func__, NG_NODE_NAME(unit->node)); 374 375 unit->state |= NG_HCI_UNIT_COMMAND_PENDING; 376 ng_callout(&unit->cmd_timo, unit->node, NULL, 377 bluetooth_hci_command_timeout(), 378 ng_hci_process_command_timeout, NULL, 0); 379 380 return (0); 381 } /* ng_hci_command_timeout */ 382 383 /* 384 * Unset HCI command timeout 385 */ 386 387 int 388 ng_hci_command_untimeout(ng_hci_unit_p unit) 389 { 390 if (!(unit->state & NG_HCI_UNIT_COMMAND_PENDING)) 391 panic( 392 "%s: %s - No command timeout!\n", __func__, NG_NODE_NAME(unit->node)); 393 394 if (ng_uncallout(&unit->cmd_timo, unit->node) == 0) 395 return (ETIMEDOUT); 396 397 unit->state &= ~NG_HCI_UNIT_COMMAND_PENDING; 398 399 return (0); 400 } /* ng_hci_command_untimeout */ 401 402 /* 403 * Set HCI connection timeout 404 * XXX FIXME: check return code from ng_callout 405 */ 406 407 int 408 ng_hci_con_timeout(ng_hci_unit_con_p con) 409 { 410 if (con->flags & NG_HCI_CON_TIMEOUT_PENDING) 411 panic( 412 "%s: %s - Duplicated connection timeout!\n", 413 __func__, NG_NODE_NAME(con->unit->node)); 414 415 con->flags |= NG_HCI_CON_TIMEOUT_PENDING; 416 ng_callout(&con->con_timo, con->unit->node, NULL, 417 bluetooth_hci_connect_timeout(), 418 ng_hci_process_con_timeout, NULL, 419 con->con_handle); 420 421 return (0); 422 } /* ng_hci_con_timeout */ 423 424 /* 425 * Unset HCI connection timeout 426 */ 427 428 int 429 ng_hci_con_untimeout(ng_hci_unit_con_p con) 430 { 431 if (!(con->flags & NG_HCI_CON_TIMEOUT_PENDING)) 432 panic( 433 "%s: %s - No connection timeout!\n", __func__, NG_NODE_NAME(con->unit->node)); 434 435 if (ng_uncallout(&con->con_timo, con->unit->node) == 0) 436 return (ETIMEDOUT); 437 438 con->flags &= ~NG_HCI_CON_TIMEOUT_PENDING; 439 440 return (0); 441 } /* ng_hci_con_untimeout */ 442 443 #if 0 444 /* 445 * Convert numeric error code/reason to a string 446 */ 447 448 char const * const 449 ng_hci_str_error(u_int16_t code) 450 { 451 #define LAST_ERROR_CODE ((sizeof(s)/sizeof(s[0]))-1) 452 static char const * const s[] = { 453 /* 0x00 */ "No error", 454 /* 0x01 */ "Unknown HCI command", 455 /* 0x02 */ "No connection", 456 /* 0x03 */ "Hardware failure", 457 /* 0x04 */ "Page timeout", 458 /* 0x05 */ "Authentication failure", 459 /* 0x06 */ "Key missing", 460 /* 0x07 */ "Memory full", 461 /* 0x08 */ "Connection timeout", 462 /* 0x09 */ "Max number of connections", 463 /* 0x0a */ "Max number of SCO connections to a unit", 464 /* 0x0b */ "ACL connection already exists", 465 /* 0x0c */ "Command disallowed", 466 /* 0x0d */ "Host rejected due to limited resources", 467 /* 0x0e */ "Host rejected due to securiity reasons", 468 /* 0x0f */ "Host rejected due to remote unit is a personal unit", 469 /* 0x10 */ "Host timeout", 470 /* 0x11 */ "Unsupported feature or parameter value", 471 /* 0x12 */ "Invalid HCI command parameter", 472 /* 0x13 */ "Other end terminated connection: User ended connection", 473 /* 0x14 */ "Other end terminated connection: Low resources", 474 /* 0x15 */ "Other end terminated connection: About to power off", 475 /* 0x16 */ "Connection terminated by local host", 476 /* 0x17 */ "Repeated attempts", 477 /* 0x18 */ "Pairing not allowed", 478 /* 0x19 */ "Unknown LMP PDU", 479 /* 0x1a */ "Unsupported remote feature", 480 /* 0x1b */ "SCO offset rejected", 481 /* 0x1c */ "SCO interval rejected", 482 /* 0x1d */ "SCO air mode rejected", 483 /* 0x1e */ "Invalid LMP parameters", 484 /* 0x1f */ "Unspecified error", 485 /* 0x20 */ "Unsupported LMP parameter value", 486 /* 0x21 */ "Role change not allowed", 487 /* 0x22 */ "LMP response timeout", 488 /* 0x23 */ "LMP error transaction collision", 489 /* 0x24 */ "LMP PSU not allowed", 490 /* 0x25 */ "Encryption mode not acceptable", 491 /* 0x26 */ "Unit key used", 492 /* 0x27 */ "QoS is not supported", 493 /* 0x28 */ "Instant passed", 494 /* 0x29 */ "Paring with unit key not supported", 495 /* SHOULD ALWAYS BE LAST */ "Unknown error" 496 }; 497 498 return ((code >= LAST_ERROR_CODE)? s[LAST_ERROR_CODE] : s[code]); 499 } /* ng_hci_str_error */ 500 #endif 501 502