1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "avdtp_util.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 43 #include "btstack.h" 44 #include "avdtp.h" 45 #include "avdtp_util.h" 46 47 #define MAX_MEDIA_CODEC_INFORMATION_LENGTH 100 48 49 static const char * avdtp_si_name[] = { 50 "ERROR", 51 "AVDTP_SI_DISCOVER", 52 "AVDTP_SI_GET_CAPABILITIES", 53 "AVDTP_SI_SET_CONFIGURATION", 54 "AVDTP_SI_GET_CONFIGURATION", 55 "AVDTP_SI_RECONFIGURE", 56 "AVDTP_SI_OPEN", 57 "AVDTP_SI_START", 58 "AVDTP_SI_CLOSE", 59 "AVDTP_SI_SUSPEND", 60 "AVDTP_SI_ABORT", 61 "AVDTP_SI_SECURITY_CONTROL", 62 "AVDTP_SI_GET_ALL_CAPABILITIES", 63 "AVDTP_SI_DELAY_REPORT" 64 }; 65 const char * avdtp_si2str(uint16_t index){ 66 if ((index <= 0) || (index >= sizeof(avdtp_si_name)/sizeof(avdtp_si_name[0]) )) return avdtp_si_name[0]; 67 return avdtp_si_name[index]; 68 } 69 70 void avdtp_reset_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 71 stream_endpoint->media_con_handle = 0; 72 stream_endpoint->l2cap_media_cid = 0; 73 stream_endpoint->l2cap_reporting_cid = 0; 74 stream_endpoint->l2cap_recovery_cid = 0; 75 76 stream_endpoint->connection = NULL; 77 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 78 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 79 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 80 81 stream_endpoint->sep.in_use = 0; 82 memset(&stream_endpoint->remote_sep, 0, sizeof(avdtp_sep_t)); 83 // memset(&stream_endpoint->remote_capabilities, 0, sizeof(avdtp_capabilities_t)); 84 // memset(&stream_endpoint->remote_configuration, 0, sizeof(avdtp_capabilities_t)); 85 86 stream_endpoint->remote_capabilities_bitmap = 0; 87 stream_endpoint->remote_configuration_bitmap = 0; 88 89 stream_endpoint->media_disconnect = 0; 90 stream_endpoint->media_connect = 0; 91 stream_endpoint->start_stream = 0; 92 stream_endpoint->stop_stream = 0; 93 stream_endpoint->send_stream = 0; 94 stream_endpoint->abort_stream = 0; 95 stream_endpoint->suspend_stream = 0; 96 stream_endpoint->sequence_number = 0; 97 } 98 99 int get_bit16(uint16_t bitmap, int position){ 100 return (bitmap >> position) & 1; 101 } 102 103 uint16_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 104 if (value){ 105 bitmap |= 1 << position; 106 } else { 107 bitmap &= ~ (1 << position); 108 } 109 return bitmap; 110 } 111 112 avdtp_message_type_t avdtp_get_signaling_packet_type(uint8_t * packet){ 113 return (avdtp_message_type_t) (packet[0] & 0x03); 114 } 115 116 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 117 int pos = 0; 118 if (size < 2) return pos; 119 signaling_header->transaction_label = packet[pos] >> 4; 120 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 121 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 122 pos++; 123 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 124 switch (signaling_header->packet_type){ 125 case AVDTP_SINGLE_PACKET: 126 signaling_header->num_packets = 0; 127 signaling_header->offset = 0; 128 signaling_header->size = 0; 129 break; 130 case AVDTP_END_PACKET: 131 signaling_header->num_packets = 0; 132 break; 133 case AVDTP_START_PACKET: 134 signaling_header->num_packets = packet[pos++]; 135 signaling_header->size = 0; 136 signaling_header->offset = 0; 137 break; 138 case AVDTP_CONTINUE_PACKET: 139 if (signaling_header->num_packets <= 0) { 140 log_info(" ERROR: wrong num fragmented packets\n"); 141 break; 142 } 143 signaling_header->num_packets--; 144 break; 145 } 146 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 147 return pos; 148 } 149 150 int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){ 151 UNUSED(size); 152 153 int i; 154 // pos = 0 reserved for length 155 int pos = 1; 156 switch(category){ 157 case AVDTP_MEDIA_TRANSPORT: 158 case AVDTP_REPORTING: 159 break; 160 case AVDTP_DELAY_REPORTING: 161 if (!pack_all_capabilities) break; 162 break; 163 case AVDTP_RECOVERY: 164 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 165 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 166 buffer[pos++] = caps.recovery.maximum_number_media_packets; 167 break; 168 case AVDTP_CONTENT_PROTECTION: 169 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 170 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 171 pos += 2; 172 (void)memcpy(buffer + pos, caps.content_protection.cp_type_value, 173 caps.content_protection.cp_type_value_len); 174 break; 175 case AVDTP_HEADER_COMPRESSION: 176 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 177 break; 178 case AVDTP_MULTIPLEXING: 179 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 180 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 181 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 182 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 183 // media, reporting. recovery 184 } 185 break; 186 case AVDTP_MEDIA_CODEC: 187 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 188 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 189 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 190 buffer[pos++] = caps.media_codec.media_codec_information[i]; 191 } 192 break; 193 default: 194 break; 195 } 196 buffer[0] = pos - 1; // length 197 return pos; 198 } 199 200 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_signal_identifier_t signal_identifier, avdtp_service_category_t category, uint8_t cap_len){ 201 connection->error_code = 0; 202 203 if ((category == AVDTP_SERVICE_CATEGORY_INVALID_0) || 204 ((category == AVDTP_SERVICE_CATEGORY_INVALID_FF) && (signal_identifier == AVDTP_SI_RECONFIGURE))){ 205 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 206 connection->reject_service_category = category; 207 connection->error_code = BAD_SERV_CATEGORY; 208 return 1; 209 } 210 211 if (signal_identifier == AVDTP_SI_RECONFIGURE){ 212 if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ 213 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 214 connection->reject_service_category = category; 215 connection->error_code = INVALID_CAPABILITIES; 216 return 1; 217 } 218 } 219 220 switch(category){ 221 case AVDTP_MEDIA_TRANSPORT: 222 if (cap_len != 0){ 223 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 224 connection->reject_service_category = category; 225 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 226 return 1; 227 } 228 break; 229 case AVDTP_REPORTING: 230 case AVDTP_DELAY_REPORTING: 231 if (cap_len != 0){ 232 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 233 connection->reject_service_category = category; 234 connection->error_code = BAD_LENGTH; 235 return 1; 236 } 237 break; 238 case AVDTP_RECOVERY: 239 if (cap_len != 3){ 240 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 241 connection->reject_service_category = category; 242 connection->error_code = BAD_RECOVERY_FORMAT; 243 return 1; 244 } 245 break; 246 case AVDTP_CONTENT_PROTECTION: 247 if (cap_len < 2){ 248 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 249 connection->reject_service_category = category; 250 connection->error_code = BAD_CP_FORMAT; 251 return 1; 252 } 253 break; 254 case AVDTP_HEADER_COMPRESSION: 255 // TODO: find error code for bad header compression 256 if (cap_len != 1){ 257 log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); 258 connection->reject_service_category = category; 259 connection->error_code = BAD_RECOVERY_FORMAT; 260 return 1; 261 } 262 break; 263 case AVDTP_MULTIPLEXING: 264 break; 265 case AVDTP_MEDIA_CODEC: 266 break; 267 default: 268 break; 269 } 270 return 0; 271 } 272 273 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_signal_identifier_t signal_identifier, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 274 275 int i; 276 277 uint16_t registered_service_categories = 0; 278 uint16_t to_process = size; 279 280 while (to_process >= 2){ 281 282 avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; 283 uint8_t cap_len = packet[1]; 284 packet += 2; 285 to_process -= 2; 286 287 if (cap_len > to_process){ 288 connection->reject_service_category = category; 289 connection->error_code = BAD_LENGTH; 290 return 0; 291 } 292 293 if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; 294 295 int category_valid = 1; 296 297 uint8_t * data = packet; 298 uint16_t pos = 0; 299 300 switch(category){ 301 case AVDTP_RECOVERY: 302 caps->recovery.recovery_type = data[pos++]; 303 caps->recovery.maximum_recovery_window_size = data[pos++]; 304 caps->recovery.maximum_number_media_packets = data[pos++]; 305 break; 306 case AVDTP_CONTENT_PROTECTION: 307 caps->content_protection.cp_type = big_endian_read_16(data, 0); 308 caps->content_protection.cp_type_value_len = cap_len - 2; 309 // connection->reject_service_category = category; 310 // connection->error_code = UNSUPPORTED_CONFIGURATION; 311 // support for content protection goes here 312 break; 313 case AVDTP_HEADER_COMPRESSION: 314 caps->header_compression.back_ch = (data[0] >> 7) & 1; 315 caps->header_compression.media = (data[0] >> 6) & 1; 316 caps->header_compression.recovery = (data[0] >> 5) & 1; 317 break; 318 case AVDTP_MULTIPLEXING: 319 caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; 320 // read [tsid, tcid] for media, reporting. recovery respectively 321 caps->multiplexing_mode.transport_identifiers_num = 3; 322 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 323 caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; 324 caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; 325 } 326 break; 327 case AVDTP_MEDIA_CODEC: 328 caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); 329 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); 330 caps->media_codec.media_codec_information_len = cap_len - 2; 331 caps->media_codec.media_codec_information = &data[pos++]; 332 break; 333 case AVDTP_MEDIA_TRANSPORT: 334 case AVDTP_REPORTING: 335 case AVDTP_DELAY_REPORTING: 336 break; 337 default: 338 category_valid = 0; 339 break; 340 } 341 342 if (category_valid) { 343 registered_service_categories = store_bit16(registered_service_categories, category, 1); 344 } 345 346 packet += cap_len; 347 to_process -= cap_len; 348 } 349 350 return registered_service_categories; 351 } 352 353 void avdtp_prepare_capabilities(avdtp_signaling_packet_t * signaling_packet, uint8_t transaction_label, uint16_t registered_service_categories, avdtp_capabilities_t capabilities, uint8_t identifier){ 354 if (signaling_packet->offset) return; 355 uint8_t pack_all_capabilities = 1; 356 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 357 int i; 358 359 signaling_packet->size = 0; 360 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 361 362 363 switch (identifier) { 364 case AVDTP_SI_GET_CAPABILITIES: 365 pack_all_capabilities = 0; 366 break; 367 case AVDTP_SI_GET_ALL_CAPABILITIES: 368 pack_all_capabilities = 1; 369 break; 370 case AVDTP_SI_SET_CONFIGURATION: 371 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 372 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 373 signaling_packet->message_type = AVDTP_CMD_MSG; 374 break; 375 case AVDTP_SI_RECONFIGURE: 376 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 377 signaling_packet->message_type = AVDTP_CMD_MSG; 378 break; 379 default: 380 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 381 break; 382 } 383 384 for (i = 1; i < 9; i++){ 385 int registered_category = get_bit16(registered_service_categories, i); 386 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ 387 // TODO: introduce bitmap of mandatory categories 388 if (i == 1){ 389 registered_category = 1; 390 } 391 } 392 if (registered_category){ 393 // service category 394 signaling_packet->command[signaling_packet->size++] = i; 395 signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command+signaling_packet->size, sizeof(signaling_packet->command)-signaling_packet->size, capabilities, (avdtp_service_category_t)i, pack_all_capabilities); 396 } 397 } 398 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 399 signaling_packet->transaction_label = transaction_label; 400 } 401 402 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 403 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 404 int data_len = 0; 405 406 uint16_t offset = signaling_packet->offset; 407 uint16_t pos = 1; 408 409 if (offset == 0){ 410 if (signaling_packet->size <= (mtu - 2)){ 411 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 412 out_buffer[pos++] = signaling_packet->signal_identifier; 413 data_len = signaling_packet->size; 414 } else { 415 signaling_packet->packet_type = AVDTP_START_PACKET; 416 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 417 out_buffer[pos++] = signaling_packet->signal_identifier; 418 data_len = mtu - 3; 419 signaling_packet->offset = data_len; 420 } 421 } else { 422 int remaining_bytes = signaling_packet->size - offset; 423 if (remaining_bytes <= (mtu - 1)){ 424 signaling_packet->packet_type = AVDTP_END_PACKET; 425 data_len = remaining_bytes; 426 signaling_packet->offset = 0; 427 } else{ 428 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 429 data_len = mtu - 1; 430 signaling_packet->offset += data_len; 431 } 432 } 433 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 434 (void)memcpy(out_buffer + pos, signaling_packet->command + offset, 435 data_len); 436 pos += data_len; 437 return pos; 438 } 439 440 441 void avdtp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t avdtp_cid, bd_addr_t addr, uint8_t status){ 442 if (!callback) return; 443 uint8_t event[12]; 444 int pos = 0; 445 event[pos++] = HCI_EVENT_AVDTP_META; 446 event[pos++] = sizeof(event) - 2; 447 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 448 little_endian_store_16(event, pos, avdtp_cid); 449 pos += 2; 450 reverse_bd_addr(addr,&event[pos]); 451 pos += 6; 452 event[pos++] = status; 453 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 454 } 455 456 void avdtp_streaming_emit_can_send_media_packet_now(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t seid, uint16_t sequence_number){ 457 if (!callback) return; 458 uint8_t event[8]; 459 int pos = 0; 460 event[pos++] = HCI_EVENT_AVDTP_META; 461 event[pos++] = sizeof(event) - 2; 462 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 463 little_endian_store_16(event, pos, avdtp_cid); 464 pos += 2; 465 event[pos++] = seid; 466 little_endian_store_16(event, pos, sequence_number); 467 pos += 2; 468 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 469 } 470 471 void avdtp_signaling_emit_connection_released(btstack_packet_handler_t callback, uint16_t avdtp_cid){ 472 if (!callback) return; 473 uint8_t event[5]; 474 int pos = 0; 475 event[pos++] = HCI_EVENT_AVDTP_META; 476 event[pos++] = sizeof(event) - 2; 477 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 478 little_endian_store_16(event, pos, avdtp_cid); 479 pos += 2; 480 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 481 } 482 483 void avdtp_streaming_emit_connection_released(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid){ 484 if (!callback) return; 485 uint8_t event[6]; 486 int pos = 0; 487 event[pos++] = HCI_EVENT_AVDTP_META; 488 event[pos++] = sizeof(event) - 2; 489 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 490 little_endian_store_16(event, pos, avdtp_cid); 491 pos += 2; 492 event[pos++] = local_seid; 493 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 494 } 495 496 void avdtp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t avdtp_cid, bd_addr_t addr, uint8_t local_seid, uint8_t remote_seid, uint8_t status){ 497 if (!callback) return; 498 uint8_t event[14]; 499 int pos = 0; 500 event[pos++] = HCI_EVENT_AVDTP_META; 501 event[pos++] = sizeof(event) - 2; 502 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 503 little_endian_store_16(event, pos, avdtp_cid); 504 pos += 2; 505 reverse_bd_addr(addr,&event[pos]); 506 pos += 6; 507 event[pos++] = local_seid; 508 event[pos++] = remote_seid; 509 event[pos++] = status; 510 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 511 } 512 513 void avdtp_signaling_emit_sep(btstack_packet_handler_t callback, uint16_t avdtp_cid, avdtp_sep_t sep){ 514 if (!callback) return; 515 uint8_t event[9]; 516 int pos = 0; 517 event[pos++] = HCI_EVENT_AVDTP_META; 518 event[pos++] = sizeof(event) - 2; 519 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 520 little_endian_store_16(event, pos, avdtp_cid); 521 pos += 2; 522 event[pos++] = sep.seid; 523 event[pos++] = sep.in_use; 524 event[pos++] = sep.media_type; 525 event[pos++] = sep.type; 526 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 527 } 528 529 void avdtp_signaling_emit_sep_done(btstack_packet_handler_t callback, uint16_t avdtp_cid){ 530 if (!callback) return; 531 uint8_t event[5]; 532 int pos = 0; 533 event[pos++] = HCI_EVENT_AVDTP_META; 534 event[pos++] = sizeof(event) - 2; 535 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; 536 little_endian_store_16(event, pos, avdtp_cid); 537 pos += 2; 538 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 539 } 540 541 void avdtp_signaling_emit_delay(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint16_t delay){ 542 if (!callback) return; 543 uint8_t event[8]; 544 int pos = 0; 545 event[pos++] = HCI_EVENT_AVDTP_META; 546 event[pos++] = sizeof(event) - 2; 547 event[pos++] = AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT; 548 little_endian_store_16(event, pos, avdtp_cid); 549 pos += 2; 550 event[pos++] = local_seid; 551 little_endian_store_16(event, pos, delay); 552 pos += 2; 553 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 554 } 555 556 void avdtp_signaling_emit_accept(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator){ 557 if (!callback) return; 558 uint8_t event[8]; 559 int pos = 0; 560 event[pos++] = HCI_EVENT_AVDTP_META; 561 event[pos++] = sizeof(event) - 2; 562 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 563 little_endian_store_16(event, pos, avdtp_cid); 564 pos += 2; 565 event[pos++] = local_seid; 566 event[pos++] = is_initiator ? 1 : 0; 567 event[pos++] = identifier; 568 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 569 } 570 571 void avdtp_signaling_emit_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator){ 572 if (!callback) return; 573 uint8_t event[8]; 574 int pos = 0; 575 event[pos++] = HCI_EVENT_AVDTP_META; 576 event[pos++] = sizeof(event) - 2; 577 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 578 little_endian_store_16(event, pos, avdtp_cid); 579 pos += 2; 580 event[pos++] = local_seid; 581 event[pos++] = is_initiator ? 1 : 0; 582 event[pos++] = identifier; 583 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 584 } 585 586 void avdtp_signaling_emit_general_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator){ 587 if (!callback) return; 588 uint8_t event[8]; 589 int pos = 0; 590 event[pos++] = HCI_EVENT_AVDTP_META; 591 event[pos++] = sizeof(event) - 2; 592 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 593 little_endian_store_16(event, pos, avdtp_cid); 594 pos += 2; 595 event[pos++] = local_seid; 596 event[pos++] = is_initiator ? 1 : 0; 597 event[pos++] = identifier; 598 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 599 } 600 601 static void avdtp_signaling_emit_media_codec_sbc_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 602 if (!callback) return; 603 uint8_t event[15]; 604 int pos = 0; 605 event[pos++] = HCI_EVENT_AVDTP_META; 606 event[pos++] = sizeof(event) - 2; 607 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 608 little_endian_store_16(event, pos, avdtp_cid); 609 pos += 2; 610 event[pos++] = local_seid; 611 event[pos++] = remote_seid; 612 event[pos++] = media_codec.media_type; 613 event[pos++] = media_codec.media_codec_information[0] >> 4; 614 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 615 event[pos++] = media_codec.media_codec_information[1] >> 4; 616 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 617 event[pos++] = media_codec.media_codec_information[1] & 0x03; 618 event[pos++] = media_codec.media_codec_information[2]; 619 event[pos++] = media_codec.media_codec_information[3]; 620 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 621 } 622 623 static inline void avdtp_signaling_emit_capability(btstack_packet_handler_t callback, uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid){ 624 if (!callback) return; 625 uint8_t event[7]; 626 int pos = 0; 627 event[pos++] = HCI_EVENT_AVDTP_META; 628 event[pos++] = sizeof(event) - 2; 629 event[pos++] = capability_subevent_id; 630 little_endian_store_16(event, pos, avdtp_cid); 631 pos += 2; 632 event[pos++] = local_seid; 633 event[pos++] = remote_seid; 634 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 635 } 636 637 static void avdtp_signaling_emit_media_transport_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid){ 638 avdtp_signaling_emit_capability(callback, AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, local_seid, remote_seid); 639 } 640 641 static void avdtp_signaling_emit_reporting_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid){ 642 avdtp_signaling_emit_capability(callback, AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, local_seid, remote_seid); 643 } 644 645 static void avdtp_signaling_emit_delay_reporting_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid){ 646 avdtp_signaling_emit_capability(callback, AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, local_seid, remote_seid); 647 } 648 649 static void avdtp_signaling_emit_recovery_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_recovery_capabilities_t * recovery){ 650 if (!callback) return; 651 uint8_t event[10]; 652 int pos = 0; 653 event[pos++] = HCI_EVENT_AVDTP_META; 654 event[pos++] = sizeof(event) - 2; 655 event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; 656 little_endian_store_16(event, pos, avdtp_cid); 657 pos += 2; 658 event[pos++] = local_seid; 659 event[pos++] = remote_seid; 660 event[pos++] = recovery->recovery_type; 661 event[pos++] = recovery->maximum_recovery_window_size; 662 event[pos++] = recovery->maximum_number_media_packets; 663 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 664 } 665 666 static void avdtp_signaling_emit_content_protection_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_content_protection_t * content_protection){ 667 if (!callback) return; 668 uint8_t event[22]; 669 int pos = 0; 670 event[pos++] = HCI_EVENT_AVDTP_META; 671 event[pos++] = sizeof(event) - 2; 672 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; 673 little_endian_store_16(event, pos, avdtp_cid); 674 pos += 2; 675 event[pos++] = local_seid; 676 event[pos++] = remote_seid; 677 678 little_endian_store_16(event, pos, content_protection->cp_type); 679 pos += 2; 680 little_endian_store_16(event, pos, content_protection->cp_type_value_len); 681 pos += 2; 682 683 //TODO: reserve place for value 684 if (content_protection->cp_type_value_len < 10){ 685 (void)memcpy(event + pos, content_protection->cp_type_value, 686 content_protection->cp_type_value_len); 687 } 688 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 689 } 690 691 692 static void avdtp_signaling_emit_header_compression_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_header_compression_capabilities_t * header_compression){ 693 if (!callback) return; 694 uint8_t event[10]; 695 int pos = 0; 696 event[pos++] = HCI_EVENT_AVDTP_META; 697 event[pos++] = sizeof(event) - 2; 698 event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; 699 little_endian_store_16(event, pos, avdtp_cid); 700 pos += 2; 701 event[pos++] = local_seid; 702 event[pos++] = remote_seid; 703 event[pos++] = header_compression->back_ch; 704 event[pos++] = header_compression->media; 705 event[pos++] = header_compression->recovery; 706 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 707 } 708 709 static void avdtp_signaling_emit_content_multiplexing_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_multiplexing_mode_capabilities_t * multiplexing_mode){ 710 if (!callback) return; 711 uint8_t event[15]; 712 int pos = 0; 713 event[pos++] = HCI_EVENT_AVDTP_META; 714 event[pos++] = sizeof(event) - 2; 715 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; 716 little_endian_store_16(event, pos, avdtp_cid); 717 pos += 2; 718 event[pos++] = local_seid; 719 event[pos++] = remote_seid; 720 721 event[pos++] = multiplexing_mode->fragmentation; 722 event[pos++] = multiplexing_mode->transport_identifiers_num; 723 724 int i; 725 for (i = 0; i < 3; i++){ 726 event[pos++] = multiplexing_mode->transport_session_identifiers[i]; 727 } 728 for (i = 0; i < 3; i++){ 729 event[pos++] = multiplexing_mode->tcid[i]; 730 } 731 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 732 } 733 734 static void avdtp_signaling_emit_media_codec_other_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 735 if (!callback) return; 736 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 12]; 737 int pos = 0; 738 event[pos++] = HCI_EVENT_AVDTP_META; 739 event[pos++] = sizeof(event) - 2; 740 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 741 little_endian_store_16(event, pos, avdtp_cid); 742 pos += 2; 743 event[pos++] = local_seid; 744 event[pos++] = remote_seid; 745 event[pos++] = media_codec.media_type; 746 little_endian_store_16(event, pos, media_codec.media_codec_type); 747 pos += 2; 748 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 749 pos += 2; 750 (void)memcpy(event + pos, media_codec.media_codec_information, 751 btstack_min(media_codec.media_codec_information_len, MAX_MEDIA_CODEC_INFORMATION_LENGTH)); 752 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 753 } 754 755 static inline void avdtp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 756 avdtp_media_type_t media_type, const uint8_t * media_codec_information, uint8_t reconfigure) { 757 if (!callback) return; 758 uint8_t event[16 + 2]; 759 int pos = 0; 760 event[pos++] = HCI_EVENT_AVDTP_META; 761 event[pos++] = sizeof(event) - 2; 762 763 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 764 little_endian_store_16(event, pos, avdtp_cid); 765 pos += 2; 766 event[pos++] = local_seid; 767 event[pos++] = remote_seid; 768 event[pos++] = reconfigure; 769 770 771 uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; 772 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; 773 uint8_t block_length_bitmap = media_codec_information[1] >> 4; 774 uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; 775 776 uint8_t num_channels = 0; 777 if ((channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 778 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 779 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL)) { 780 num_channels = 2; 781 } else if (channel_mode_bitmap & AVDTP_SBC_MONO) { 782 num_channels = 1; 783 } 784 785 uint16_t sampling_frequency = 0; 786 if (sampling_frequency_bitmap & AVDTP_SBC_48000) { 787 sampling_frequency = 48000; 788 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100) { 789 sampling_frequency = 44100; 790 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000) { 791 sampling_frequency = 32000; 792 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000) { 793 sampling_frequency = 16000; 794 } 795 796 uint8_t subbands = 0; 797 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 798 subbands = 8; 799 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 800 subbands = 4; 801 } 802 803 uint8_t block_length = 0; 804 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 805 block_length = 16; 806 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 807 block_length = 12; 808 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 809 block_length = 8; 810 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 811 block_length = 4; 812 } 813 814 event[pos++] = media_type; 815 little_endian_store_16(event, pos, sampling_frequency); 816 pos += 2; 817 818 event[pos++] = channel_mode_bitmap; 819 event[pos++] = num_channels; 820 event[pos++] = block_length; 821 event[pos++] = subbands; 822 event[pos++] = media_codec_information[1] & 0x03; 823 event[pos++] = media_codec_information[2]; 824 event[pos++] = media_codec_information[3]; 825 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 826 } 827 828 void avdtp_signaling_emit_media_codec_sbc_configuration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_media_type_t media_type, const uint8_t * media_codec_information){ 829 if (!callback) return; 830 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, local_seid, remote_seid, media_type, media_codec_information, 0); 831 } 832 833 void avdtp_signaling_emit_media_codec_sbc_reconfiguration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_media_type_t media_type, const uint8_t * media_codec_information){ 834 if (!callback) return; 835 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, local_seid, remote_seid, media_type, media_codec_information, 1); 836 } 837 838 839 static inline void avdtp_signaling_emit_media_codec_other(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec, uint8_t reconfigure){ 840 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 13]; 841 int pos = 0; 842 event[pos++] = HCI_EVENT_AVDTP_META; 843 event[pos++] = sizeof(event) - 2; 844 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 845 little_endian_store_16(event, pos, avdtp_cid); 846 pos += 2; 847 event[pos++] = local_seid; 848 event[pos++] = remote_seid; 849 event[pos++] = reconfigure; 850 event[pos++] = media_codec.media_type; 851 little_endian_store_16(event, pos, media_codec.media_codec_type); 852 pos += 2; 853 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 854 pos += 2; 855 856 int media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec.media_codec_information_len); 857 (void)memcpy(event + pos, media_codec.media_codec_information, 858 media_codec_len); 859 860 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 861 } 862 863 static void avdtp_signaling_emit_capability_done(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid){ 864 if (!callback) return; 865 uint8_t event[7]; 866 int pos = 0; 867 event[pos++] = HCI_EVENT_AVDTP_META; 868 event[pos++] = sizeof(event) - 2; 869 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 870 little_endian_store_16(event, pos, avdtp_cid); 871 pos += 2; 872 event[pos++] = local_seid; 873 event[pos++] = remote_seid; 874 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 875 } 876 877 void avdtp_signaling_emit_media_codec_other_configuration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 878 if (!callback) return; 879 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, local_seid, remote_seid, media_codec, 0); 880 } 881 882 void avdtp_signaling_emit_media_codec_other_reconfiguration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 883 if (!callback) return; 884 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, local_seid, remote_seid, media_codec, 1); 885 } 886 887 void avdtp_emit_capabilities(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_capabilities_t * capabilities, uint16_t registered_service_categories){ 888 if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ 889 switch (capabilities->media_codec.media_codec_type){ 890 case AVDTP_CODEC_SBC: 891 avdtp_signaling_emit_media_codec_sbc_capability(callback, avdtp_cid, local_seid, remote_seid, capabilities->media_codec); 892 break; 893 default: 894 avdtp_signaling_emit_media_codec_other_capability(callback, avdtp_cid, local_seid, remote_seid, capabilities->media_codec); 895 break; 896 } 897 } 898 899 if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ 900 avdtp_signaling_emit_media_transport_capability(callback, avdtp_cid, local_seid, remote_seid); 901 } 902 if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ 903 avdtp_signaling_emit_reporting_capability(callback, avdtp_cid, local_seid, remote_seid); 904 } 905 if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ 906 avdtp_signaling_emit_recovery_capability(callback, avdtp_cid, local_seid, remote_seid, &capabilities->recovery); 907 } 908 if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ 909 avdtp_signaling_emit_content_protection_capability(callback, avdtp_cid, local_seid, remote_seid, &capabilities->content_protection); 910 } 911 if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ 912 avdtp_signaling_emit_header_compression_capability(callback, avdtp_cid, local_seid, remote_seid, &capabilities->header_compression); 913 } 914 if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ 915 avdtp_signaling_emit_content_multiplexing_capability(callback, avdtp_cid, local_seid, remote_seid, &capabilities->multiplexing_mode); 916 } 917 if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ 918 avdtp_signaling_emit_delay_reporting_capability(callback, avdtp_cid, local_seid, remote_seid); 919 } 920 avdtp_signaling_emit_capability_done(callback, avdtp_cid, local_seid, remote_seid); 921 } 922 923 void avdtp_emit_configuration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_capabilities_t * configuration, uint16_t configured_service_categories){ 924 if (get_bit16(configured_service_categories, AVDTP_MEDIA_CODEC)){ 925 switch (configuration->media_codec.media_codec_type){ 926 case AVDTP_CODEC_SBC: 927 avdtp_signaling_emit_media_codec_sbc_configuration(callback, avdtp_cid, local_seid, remote_seid, 928 configuration->media_codec.media_type, configuration->media_codec.media_codec_information); 929 break; 930 default: 931 avdtp_signaling_emit_media_codec_other_configuration(callback, avdtp_cid, local_seid, remote_seid, configuration->media_codec); 932 break; 933 } 934 } 935 } 936 937 938 uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 939 if (!connection) return AVDTP_CONNECTION_DOES_NOT_EXIST; 940 connection->wait_to_send_acceptor = 1; 941 l2cap_request_can_send_now_event(l2cap_cid); 942 return ERROR_CODE_SUCCESS; 943 } 944 945 uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 946 if (!connection) return AVDTP_CONNECTION_DOES_NOT_EXIST; 947 connection->wait_to_send_initiator = 1; 948 l2cap_request_can_send_now_event(l2cap_cid); 949 return ERROR_CODE_SUCCESS; 950 } 951 952 uint8_t avdtp_request_can_send_now_self(avdtp_connection_t * connection, uint16_t l2cap_cid){ 953 if (!connection) return AVDTP_CONNECTION_DOES_NOT_EXIST; 954 connection->wait_to_send_self = 1; 955 l2cap_request_can_send_now_event(l2cap_cid); 956 return ERROR_CODE_SUCCESS; 957 } 958 959 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 960 if (!stream_endpoint) return 0; 961 return stream_endpoint->sep.seid; 962 963 } 964 965 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 966 if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; 967 return stream_endpoint->remote_sep.seid; 968 } 969 970 void a2dp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t cid, bd_addr_t addr, uint8_t local_seid, uint8_t remote_seid, uint8_t status){ 971 if (!callback) return; 972 uint8_t event[14]; 973 int pos = 0; 974 event[pos++] = HCI_EVENT_A2DP_META; 975 event[pos++] = sizeof(event) - 2; 976 event[pos++] = A2DP_SUBEVENT_STREAM_ESTABLISHED; 977 little_endian_store_16(event, pos, cid); 978 pos += 2; 979 reverse_bd_addr(addr,&event[pos]); 980 pos += 6; 981 event[pos++] = local_seid; 982 event[pos++] = remote_seid; 983 event[pos++] = status; 984 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 985 } 986