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 50 /* 51 52 List of AVDTP_SUBEVENTs sorted by packet handler 53 54 55 Sink + Source: 56 - AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED 57 - AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED 58 - AVDTP_SUBEVENT_SIGNALING_SEP_FOUND 59 - AVDTP_SUBEVENT_SIGNALING_ACCEPT 60 - AVDTP_SUBEVENT_SIGNALING_REJECT 61 - AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT 62 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY 63 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY 64 - AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY 65 - AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY 66 - AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY 67 - AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY 68 - AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY 69 - AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY 70 - AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY 71 - AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE 72 - AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE 73 74 Source: 75 - AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT 76 77 Sink or Source based on SEP Type: 78 - AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED 79 - AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED 80 - AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW 81 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION 82 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION 83 84 */ 85 86 static const char * avdtp_si_name[] = { 87 "ERROR", 88 "AVDTP_SI_DISCOVER", 89 "AVDTP_SI_GET_CAPABILITIES", 90 "AVDTP_SI_SET_CONFIGURATION", 91 "AVDTP_SI_GET_CONFIGURATION", 92 "AVDTP_SI_RECONFIGURE", 93 "AVDTP_SI_OPEN", 94 "AVDTP_SI_START", 95 "AVDTP_SI_CLOSE", 96 "AVDTP_SI_SUSPEND", 97 "AVDTP_SI_ABORT", 98 "AVDTP_SI_SECURITY_CONTROL", 99 "AVDTP_SI_GET_ALL_CAPABILITIES", 100 "AVDTP_SI_DELAY_REPORT" 101 }; 102 const char * avdtp_si2str(uint16_t index){ 103 if ((index <= 0) || (index >= sizeof(avdtp_si_name)/sizeof(avdtp_si_name[0]) )) return avdtp_si_name[0]; 104 return avdtp_si_name[index]; 105 } 106 107 void avdtp_reset_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 108 stream_endpoint->media_con_handle = 0; 109 stream_endpoint->l2cap_media_cid = 0; 110 stream_endpoint->l2cap_reporting_cid = 0; 111 stream_endpoint->l2cap_recovery_cid = 0; 112 113 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 114 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 115 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 116 117 stream_endpoint->connection = NULL; 118 119 stream_endpoint->sep.in_use = 0; 120 memset(&stream_endpoint->remote_sep, 0, sizeof(avdtp_sep_t)); 121 122 stream_endpoint->remote_capabilities_bitmap = 0; 123 memset(&stream_endpoint->remote_capabilities, 0, sizeof(avdtp_capabilities_t)); 124 stream_endpoint->remote_configuration_bitmap = 0; 125 memset(&stream_endpoint->remote_configuration, 0, sizeof(avdtp_capabilities_t)); 126 127 // temporary reconfigure SBC config used by A2DP 128 memset(stream_endpoint->reconfigure_media_codec_sbc_info, 0, 4); 129 130 stream_endpoint->media_disconnect = 0; 131 stream_endpoint->media_connect = 0; 132 stream_endpoint->start_stream = 0; 133 stream_endpoint->close_stream = 0; 134 stream_endpoint->request_can_send_now = 0; 135 stream_endpoint->abort_stream = 0; 136 stream_endpoint->suspend_stream = 0; 137 stream_endpoint->sequence_number = 0; 138 } 139 140 int get_bit16(uint16_t bitmap, int position){ 141 return (bitmap >> position) & 1; 142 } 143 144 uint16_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 145 if (value){ 146 bitmap |= 1 << position; 147 } else { 148 bitmap &= ~ (1 << position); 149 } 150 return bitmap; 151 } 152 153 avdtp_message_type_t avdtp_get_signaling_packet_type(uint8_t * packet){ 154 return (avdtp_message_type_t) (packet[0] & 0x03); 155 } 156 157 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 158 int pos = 0; 159 if (size < 2) return pos; 160 signaling_header->transaction_label = packet[pos] >> 4; 161 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 162 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 163 pos++; 164 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 165 switch (signaling_header->packet_type){ 166 case AVDTP_SINGLE_PACKET: 167 signaling_header->num_packets = 0; 168 signaling_header->offset = 0; 169 signaling_header->size = 0; 170 break; 171 case AVDTP_END_PACKET: 172 signaling_header->num_packets = 0; 173 break; 174 case AVDTP_START_PACKET: 175 signaling_header->num_packets = packet[pos++]; 176 signaling_header->size = 0; 177 signaling_header->offset = 0; 178 break; 179 case AVDTP_CONTINUE_PACKET: 180 if (signaling_header->num_packets <= 0) { 181 log_info(" ERROR: wrong num fragmented packets\n"); 182 break; 183 } 184 signaling_header->num_packets--; 185 break; 186 } 187 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 188 return pos; 189 } 190 191 static bool avdtp_is_basic_capability(int service_category){ 192 return (AVDTP_MEDIA_TRANSPORT <= service_category) && (service_category <= AVDTP_MEDIA_CODEC); 193 } 194 195 int avdtp_pack_service_capabilities(uint8_t *buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category) { 196 UNUSED(size); 197 198 int i; 199 // pos = 0 reserved for length 200 int pos = 1; 201 switch(category){ 202 case AVDTP_MEDIA_TRANSPORT: 203 case AVDTP_REPORTING: 204 case AVDTP_DELAY_REPORTING: 205 break; 206 case AVDTP_RECOVERY: 207 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 208 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 209 buffer[pos++] = caps.recovery.maximum_number_media_packets; 210 break; 211 case AVDTP_CONTENT_PROTECTION: 212 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 213 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 214 pos += 2; 215 (void)memcpy(buffer + pos, caps.content_protection.cp_type_value, 216 caps.content_protection.cp_type_value_len); 217 pos += caps.content_protection.cp_type_value_len; 218 break; 219 case AVDTP_HEADER_COMPRESSION: 220 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 221 break; 222 case AVDTP_MULTIPLEXING: 223 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 224 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 225 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 226 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 227 // media, reporting. recovery 228 } 229 break; 230 case AVDTP_MEDIA_CODEC: 231 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 232 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 233 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 234 buffer[pos++] = caps.media_codec.media_codec_information[i]; 235 } 236 break; 237 default: 238 break; 239 } 240 buffer[0] = pos - 1; // length 241 return pos; 242 } 243 244 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){ 245 connection->error_code = 0; 246 247 if ((category == AVDTP_SERVICE_CATEGORY_INVALID_0) || 248 ((category == AVDTP_SERVICE_CATEGORY_INVALID_FF) && (signal_identifier == AVDTP_SI_RECONFIGURE))){ 249 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 250 connection->reject_service_category = category; 251 connection->error_code = BAD_SERV_CATEGORY; 252 return 1; 253 } 254 255 if (signal_identifier == AVDTP_SI_RECONFIGURE){ 256 if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ 257 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 258 connection->reject_service_category = category; 259 connection->error_code = INVALID_CAPABILITIES; 260 return 1; 261 } 262 } 263 264 switch(category){ 265 case AVDTP_MEDIA_TRANSPORT: 266 if (cap_len != 0){ 267 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 268 connection->reject_service_category = category; 269 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 270 return 1; 271 } 272 break; 273 case AVDTP_REPORTING: 274 case AVDTP_DELAY_REPORTING: 275 if (cap_len != 0){ 276 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 277 connection->reject_service_category = category; 278 connection->error_code = BAD_LENGTH; 279 return 1; 280 } 281 break; 282 case AVDTP_RECOVERY: 283 if (cap_len != 3){ 284 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 285 connection->reject_service_category = category; 286 connection->error_code = BAD_RECOVERY_FORMAT; 287 return 1; 288 } 289 break; 290 case AVDTP_CONTENT_PROTECTION: 291 if (cap_len < 2){ 292 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 293 connection->reject_service_category = category; 294 connection->error_code = BAD_CP_FORMAT; 295 return 1; 296 } 297 break; 298 case AVDTP_HEADER_COMPRESSION: 299 // TODO: find error code for bad header compression 300 if (cap_len != 1){ 301 log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); 302 connection->reject_service_category = category; 303 connection->error_code = BAD_RECOVERY_FORMAT; 304 return 1; 305 } 306 break; 307 case AVDTP_MULTIPLEXING: 308 break; 309 case AVDTP_MEDIA_CODEC: 310 break; 311 default: 312 break; 313 } 314 return 0; 315 } 316 317 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){ 318 319 int i; 320 321 uint16_t registered_service_categories = 0; 322 uint16_t to_process = size; 323 324 while (to_process >= 2){ 325 326 avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; 327 uint8_t cap_len = packet[1]; 328 packet += 2; 329 to_process -= 2; 330 331 if (cap_len > to_process){ 332 connection->reject_service_category = category; 333 connection->error_code = BAD_LENGTH; 334 return 0; 335 } 336 337 if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; 338 339 int category_valid = 1; 340 341 uint8_t * data = packet; 342 uint16_t pos = 0; 343 344 switch(category){ 345 case AVDTP_RECOVERY: 346 caps->recovery.recovery_type = data[pos++]; 347 caps->recovery.maximum_recovery_window_size = data[pos++]; 348 caps->recovery.maximum_number_media_packets = data[pos++]; 349 break; 350 case AVDTP_CONTENT_PROTECTION: 351 caps->content_protection.cp_type = big_endian_read_16(data, 0); 352 caps->content_protection.cp_type_value_len = cap_len - 2; 353 // connection->reject_service_category = category; 354 // connection->error_code = UNSUPPORTED_CONFIGURATION; 355 // support for content protection goes here 356 break; 357 case AVDTP_HEADER_COMPRESSION: 358 caps->header_compression.back_ch = (data[0] >> 7) & 1; 359 caps->header_compression.media = (data[0] >> 6) & 1; 360 caps->header_compression.recovery = (data[0] >> 5) & 1; 361 break; 362 case AVDTP_MULTIPLEXING: 363 caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; 364 // read [tsid, tcid] for media, reporting. recovery respectively 365 caps->multiplexing_mode.transport_identifiers_num = 3; 366 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 367 caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; 368 caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; 369 } 370 break; 371 case AVDTP_MEDIA_CODEC: 372 caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); 373 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); 374 caps->media_codec.media_codec_information_len = cap_len - 2; 375 caps->media_codec.media_codec_information = &data[pos++]; 376 break; 377 case AVDTP_MEDIA_TRANSPORT: 378 case AVDTP_REPORTING: 379 case AVDTP_DELAY_REPORTING: 380 break; 381 default: 382 category_valid = 0; 383 break; 384 } 385 386 if (category_valid) { 387 registered_service_categories = store_bit16(registered_service_categories, category, 1); 388 } 389 390 packet += cap_len; 391 to_process -= cap_len; 392 } 393 394 return registered_service_categories; 395 } 396 397 void avdtp_prepare_capabilities(avdtp_signaling_packet_t * signaling_packet, uint8_t transaction_label, uint16_t service_categories, avdtp_capabilities_t capabilities, uint8_t identifier){ 398 if (signaling_packet->offset) return; 399 bool basic_capabilities_only = false; 400 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 401 int i; 402 403 signaling_packet->size = 0; 404 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 405 406 switch (identifier) { 407 case AVDTP_SI_GET_CAPABILITIES: 408 basic_capabilities_only = true; 409 break; 410 case AVDTP_SI_GET_ALL_CAPABILITIES: 411 break; 412 case AVDTP_SI_SET_CONFIGURATION: 413 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 414 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 415 signaling_packet->message_type = AVDTP_CMD_MSG; 416 break; 417 case AVDTP_SI_RECONFIGURE: 418 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 419 signaling_packet->message_type = AVDTP_CMD_MSG; 420 break; 421 default: 422 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 423 break; 424 } 425 426 for (i = AVDTP_MEDIA_TRANSPORT; i <= AVDTP_DELAY_REPORTING; i++){ 427 int registered_category = get_bit16(service_categories, i); 428 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ 429 // TODO: introduce bitmap of mandatory categories 430 if (i == AVDTP_MEDIA_TRANSPORT){ 431 registered_category = true; 432 } 433 } 434 // AVDTP_SI_GET_CAPABILITIES reports only basic capabilities (i.e., it skips non-basic categories) 435 if (basic_capabilities_only && !avdtp_is_basic_capability(i)){ 436 registered_category = false; 437 } 438 439 if (registered_category){ 440 // service category 441 signaling_packet->command[signaling_packet->size++] = i; 442 signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command + signaling_packet->size, 443 sizeof(signaling_packet->command) - signaling_packet->size, capabilities, (avdtp_service_category_t) i); 444 } 445 } 446 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 447 signaling_packet->transaction_label = transaction_label; 448 } 449 450 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 451 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 452 int data_len = 0; 453 454 uint16_t offset = signaling_packet->offset; 455 uint16_t pos = 1; 456 457 if (offset == 0){ 458 if (signaling_packet->size <= (mtu - 2)){ 459 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 460 out_buffer[pos++] = signaling_packet->signal_identifier; 461 data_len = signaling_packet->size; 462 } else { 463 signaling_packet->packet_type = AVDTP_START_PACKET; 464 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 465 out_buffer[pos++] = signaling_packet->signal_identifier; 466 data_len = mtu - 3; 467 signaling_packet->offset = data_len; 468 } 469 } else { 470 int remaining_bytes = signaling_packet->size - offset; 471 if (remaining_bytes <= (mtu - 1)){ 472 signaling_packet->packet_type = AVDTP_END_PACKET; 473 data_len = remaining_bytes; 474 signaling_packet->offset = 0; 475 } else{ 476 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 477 data_len = mtu - 1; 478 signaling_packet->offset += data_len; 479 } 480 } 481 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 482 (void)memcpy(out_buffer + pos, signaling_packet->command + offset, 483 data_len); 484 pos += data_len; 485 return pos; 486 } 487 488 489 void avdtp_signaling_emit_connection_established(uint16_t avdtp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status) { 490 uint8_t event[14]; 491 int pos = 0; 492 event[pos++] = HCI_EVENT_AVDTP_META; 493 event[pos++] = sizeof(event) - 2; 494 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 495 little_endian_store_16(event, pos, avdtp_cid); 496 pos += 2; 497 reverse_bd_addr(addr,&event[pos]); 498 pos += 6; 499 little_endian_store_16(event, pos, con_handle); 500 pos += 2; 501 event[pos++] = status; 502 avdtp_emit_sink_and_source(event, pos); 503 } 504 505 void avdtp_signaling_emit_connection_released(uint16_t avdtp_cid) { 506 uint8_t event[5]; 507 int pos = 0; 508 event[pos++] = HCI_EVENT_AVDTP_META; 509 event[pos++] = sizeof(event) - 2; 510 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 511 little_endian_store_16(event, pos, avdtp_cid); 512 pos += 2; 513 avdtp_emit_sink_and_source(event, pos); 514 } 515 516 void avdtp_signaling_emit_sep(uint16_t avdtp_cid, avdtp_sep_t sep) { 517 uint8_t event[9]; 518 int pos = 0; 519 event[pos++] = HCI_EVENT_AVDTP_META; 520 event[pos++] = sizeof(event) - 2; 521 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 522 little_endian_store_16(event, pos, avdtp_cid); 523 pos += 2; 524 event[pos++] = sep.seid; 525 event[pos++] = sep.in_use; 526 event[pos++] = sep.media_type; 527 event[pos++] = sep.type; 528 avdtp_emit_sink_and_source(event, pos); 529 } 530 531 void avdtp_signaling_emit_sep_done(uint16_t avdtp_cid) { 532 uint8_t event[5]; 533 int pos = 0; 534 event[pos++] = HCI_EVENT_AVDTP_META; 535 event[pos++] = sizeof(event) - 2; 536 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; 537 little_endian_store_16(event, pos, avdtp_cid); 538 pos += 2; 539 avdtp_emit_sink_and_source(event, pos); 540 } 541 542 void avdtp_signaling_emit_accept(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 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_ACCEPT; 548 little_endian_store_16(event, pos, avdtp_cid); 549 pos += 2; 550 event[pos++] = local_seid; 551 event[pos++] = is_initiator ? 1 : 0; 552 event[pos++] = identifier; 553 avdtp_emit_sink_and_source(event, pos); 554 } 555 556 void avdtp_signaling_emit_accept_for_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator){ 557 uint8_t event[8]; 558 int pos = 0; 559 event[pos++] = HCI_EVENT_AVDTP_META; 560 event[pos++] = sizeof(event) - 2; 561 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 562 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 563 pos += 2; 564 event[pos++] = local_seid; 565 event[pos++] = is_initiator ? 1 : 0; 566 event[pos++] = identifier; 567 568 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 569 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 570 } 571 572 void avdtp_signaling_emit_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 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 avdtp_emit_sink_and_source(event, pos); 584 } 585 586 void avdtp_signaling_emit_general_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 587 uint8_t event[8]; 588 int pos = 0; 589 event[pos++] = HCI_EVENT_AVDTP_META; 590 event[pos++] = sizeof(event) - 2; 591 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 592 little_endian_store_16(event, pos, avdtp_cid); 593 pos += 2; 594 event[pos++] = local_seid; 595 event[pos++] = is_initiator ? 1 : 0; 596 event[pos++] = identifier; 597 avdtp_emit_sink_and_source(event, pos); 598 } 599 600 static inline void 601 avdtp_signaling_emit_capability(uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t remote_seid) { 602 uint8_t event[6]; 603 int pos = 0; 604 event[pos++] = HCI_EVENT_AVDTP_META; 605 event[pos++] = sizeof(event) - 2; 606 event[pos++] = capability_subevent_id; 607 little_endian_store_16(event, pos, avdtp_cid); 608 pos += 2; 609 event[pos++] = remote_seid; 610 avdtp_emit_sink_and_source(event, pos); 611 } 612 613 static void avdtp_signaling_emit_media_codec_sbc_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 614 uint8_t event[14]; 615 int pos = 0; 616 event[pos++] = HCI_EVENT_AVDTP_META; 617 event[pos++] = sizeof(event) - 2; 618 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 619 little_endian_store_16(event, pos, avdtp_cid); 620 pos += 2; 621 event[pos++] = remote_seid; 622 event[pos++] = media_codec.media_type; 623 event[pos++] = media_codec.media_codec_information[0] >> 4; 624 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 625 event[pos++] = media_codec.media_codec_information[1] >> 4; 626 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 627 event[pos++] = media_codec.media_codec_information[1] & 0x03; 628 event[pos++] = media_codec.media_codec_information[2]; 629 event[pos++] = media_codec.media_codec_information[3]; 630 avdtp_emit_sink_and_source(event, pos); 631 } 632 633 static void avdtp_signaling_emit_media_codec_other_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 634 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 11]; 635 int pos = 0; 636 event[pos++] = HCI_EVENT_AVDTP_META; 637 event[pos++] = sizeof(event) - 2; 638 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 639 little_endian_store_16(event, pos, avdtp_cid); 640 pos += 2; 641 event[pos++] = remote_seid; 642 event[pos++] = media_codec.media_type; 643 little_endian_store_16(event, pos, media_codec.media_codec_type); 644 pos += 2; 645 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 646 pos += 2; 647 (void)memcpy(event + pos, media_codec.media_codec_information, 648 btstack_min(media_codec.media_codec_information_len, MAX_MEDIA_CODEC_INFORMATION_LENGTH)); 649 avdtp_emit_sink_and_source(event, pos); 650 } 651 652 static void 653 avdtp_signaling_emit_media_transport_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 654 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, 655 remote_seid); 656 } 657 658 static void avdtp_signaling_emit_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 659 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, remote_seid); 660 } 661 662 static void 663 avdtp_signaling_emit_delay_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 664 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, 665 remote_seid); 666 } 667 668 static void avdtp_signaling_emit_recovery_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_recovery_capabilities_t *recovery) { 669 uint8_t event[9]; 670 int pos = 0; 671 event[pos++] = HCI_EVENT_AVDTP_META; 672 event[pos++] = sizeof(event) - 2; 673 event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; 674 little_endian_store_16(event, pos, avdtp_cid); 675 pos += 2; 676 event[pos++] = remote_seid; 677 event[pos++] = recovery->recovery_type; 678 event[pos++] = recovery->maximum_recovery_window_size; 679 event[pos++] = recovery->maximum_number_media_packets; 680 avdtp_emit_sink_and_source(event, pos); 681 } 682 683 static void 684 avdtp_signaling_emit_content_protection_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_content_protection_t *content_protection) { 685 uint8_t event[21]; 686 int pos = 0; 687 event[pos++] = HCI_EVENT_AVDTP_META; 688 event[pos++] = sizeof(event) - 2; 689 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; 690 little_endian_store_16(event, pos, avdtp_cid); 691 pos += 2; 692 event[pos++] = remote_seid; 693 694 little_endian_store_16(event, pos, content_protection->cp_type); 695 pos += 2; 696 little_endian_store_16(event, pos, content_protection->cp_type_value_len); 697 pos += 2; 698 699 //TODO: reserve place for value 700 if (content_protection->cp_type_value_len < 10){ 701 (void)memcpy(event + pos, content_protection->cp_type_value, 702 content_protection->cp_type_value_len); 703 } 704 avdtp_emit_sink_and_source(event, pos); 705 } 706 707 708 static void 709 avdtp_signaling_emit_header_compression_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_header_compression_capabilities_t *header_compression) { 710 uint8_t event[9]; 711 int pos = 0; 712 event[pos++] = HCI_EVENT_AVDTP_META; 713 event[pos++] = sizeof(event) - 2; 714 event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; 715 little_endian_store_16(event, pos, avdtp_cid); 716 pos += 2; 717 event[pos++] = remote_seid; 718 event[pos++] = header_compression->back_ch; 719 event[pos++] = header_compression->media; 720 event[pos++] = header_compression->recovery; 721 avdtp_emit_sink_and_source(event, pos); 722 } 723 724 static void 725 avdtp_signaling_emit_content_multiplexing_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_multiplexing_mode_capabilities_t *multiplexing_mode) { 726 uint8_t event[14]; 727 int pos = 0; 728 event[pos++] = HCI_EVENT_AVDTP_META; 729 event[pos++] = sizeof(event) - 2; 730 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; 731 little_endian_store_16(event, pos, avdtp_cid); 732 pos += 2; 733 event[pos++] = remote_seid; 734 735 event[pos++] = multiplexing_mode->fragmentation; 736 event[pos++] = multiplexing_mode->transport_identifiers_num; 737 738 int i; 739 for (i = 0; i < 3; i++){ 740 event[pos++] = multiplexing_mode->transport_session_identifiers[i]; 741 } 742 for (i = 0; i < 3; i++){ 743 event[pos++] = multiplexing_mode->tcid[i]; 744 } 745 avdtp_emit_sink_and_source(event, pos); 746 } 747 748 static void avdtp_signaling_emit_capability_done(uint16_t avdtp_cid, uint8_t remote_seid) { 749 uint8_t event[6]; 750 int pos = 0; 751 event[pos++] = HCI_EVENT_AVDTP_META; 752 event[pos++] = sizeof(event) - 2; 753 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 754 little_endian_store_16(event, pos, avdtp_cid); 755 pos += 2; 756 event[pos++] = remote_seid; 757 avdtp_emit_sink_and_source(event, pos); 758 } 759 760 // emit events for all capabilities incl. final done event 761 void avdtp_signaling_emit_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_capabilities_t *capabilities, 762 uint16_t registered_service_categories) { 763 if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ 764 switch (capabilities->media_codec.media_codec_type){ 765 case AVDTP_CODEC_SBC: 766 avdtp_signaling_emit_media_codec_sbc_capability(avdtp_cid, remote_seid, capabilities->media_codec); 767 break; 768 default: 769 avdtp_signaling_emit_media_codec_other_capability(avdtp_cid, remote_seid, capabilities->media_codec); 770 break; 771 } 772 } 773 774 if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ 775 avdtp_signaling_emit_media_transport_capability(avdtp_cid, remote_seid); 776 } 777 if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ 778 avdtp_signaling_emit_reporting_capability(avdtp_cid, remote_seid); 779 } 780 if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ 781 avdtp_signaling_emit_recovery_capability(avdtp_cid, remote_seid, &capabilities->recovery); 782 } 783 if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ 784 avdtp_signaling_emit_content_protection_capability(avdtp_cid, remote_seid, 785 &capabilities->content_protection); 786 } 787 if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ 788 avdtp_signaling_emit_header_compression_capability(avdtp_cid, remote_seid, 789 &capabilities->header_compression); 790 } 791 if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ 792 avdtp_signaling_emit_content_multiplexing_capability(avdtp_cid, remote_seid, 793 &capabilities->multiplexing_mode); 794 } 795 if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ 796 avdtp_signaling_emit_delay_reporting_capability(avdtp_cid, remote_seid); 797 } 798 avdtp_signaling_emit_capability_done(avdtp_cid, remote_seid); 799 } 800 801 static void avdtp_signaling_emit_media_codec_sbc(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 802 avdtp_media_type_t media_type, const uint8_t *media_codec_information, 803 uint8_t reconfigure) { 804 805 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 806 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 807 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 808 809 uint8_t event[16 + 2]; 810 int pos = 0; 811 event[pos++] = HCI_EVENT_AVDTP_META; 812 event[pos++] = sizeof(event) - 2; 813 814 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 815 little_endian_store_16(event, pos, avdtp_cid); 816 pos += 2; 817 event[pos++] = local_seid; 818 event[pos++] = remote_seid; 819 event[pos++] = reconfigure; 820 821 822 uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; 823 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; 824 uint8_t block_length_bitmap = media_codec_information[1] >> 4; 825 uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; 826 827 uint8_t num_channels = 0; 828 if ((channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 829 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 830 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL)) { 831 num_channels = 2; 832 } else if (channel_mode_bitmap & AVDTP_SBC_MONO) { 833 num_channels = 1; 834 } 835 836 uint16_t sampling_frequency = 0; 837 if (sampling_frequency_bitmap & AVDTP_SBC_48000) { 838 sampling_frequency = 48000; 839 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100) { 840 sampling_frequency = 44100; 841 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000) { 842 sampling_frequency = 32000; 843 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000) { 844 sampling_frequency = 16000; 845 } 846 847 uint8_t subbands = 0; 848 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 849 subbands = 8; 850 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 851 subbands = 4; 852 } 853 854 uint8_t block_length = 0; 855 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 856 block_length = 16; 857 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 858 block_length = 12; 859 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 860 block_length = 8; 861 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 862 block_length = 4; 863 } 864 865 event[pos++] = media_type; 866 little_endian_store_16(event, pos, sampling_frequency); 867 pos += 2; 868 869 event[pos++] = channel_mode_bitmap; 870 event[pos++] = num_channels; 871 event[pos++] = block_length; 872 event[pos++] = subbands; 873 event[pos++] = media_codec_information[1] & 0x03; 874 event[pos++] = media_codec_information[2]; 875 event[pos++] = media_codec_information[3]; 876 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 877 } 878 879 static void avdtp_signaling_emit_media_codec_other(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 880 adtvp_media_codec_capabilities_t * media_codec, uint8_t reconfigure) { 881 882 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 883 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 884 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 885 886 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 13]; 887 int pos = 0; 888 event[pos++] = HCI_EVENT_AVDTP_META; 889 event[pos++] = sizeof(event) - 2; 890 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 891 little_endian_store_16(event, pos, avdtp_cid); 892 pos += 2; 893 event[pos++] = local_seid; 894 event[pos++] = remote_seid; 895 event[pos++] = reconfigure; 896 event[pos++] = media_codec->media_type; 897 little_endian_store_16(event, pos, media_codec->media_codec_type); 898 pos += 2; 899 little_endian_store_16(event, pos, media_codec->media_codec_information_len); 900 pos += 2; 901 902 int media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec->media_codec_information_len); 903 (void)memcpy(event + pos, media_codec->media_codec_information, media_codec_len); 904 905 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 906 } 907 908 void avdtp_signaling_emit_delay(uint16_t avdtp_cid, uint8_t local_seid, uint16_t delay) { 909 uint8_t event[8]; 910 int pos = 0; 911 event[pos++] = HCI_EVENT_AVDTP_META; 912 event[pos++] = sizeof(event) - 2; 913 event[pos++] = AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT; 914 little_endian_store_16(event, pos, avdtp_cid); 915 pos += 2; 916 event[pos++] = local_seid; 917 little_endian_store_16(event, pos, delay); 918 pos += 2; 919 avdtp_emit_source(event, sizeof(event)); 920 } 921 922 void avdtp_signaling_emit_media_codec_sbc_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 923 avdtp_media_type_t media_type, 924 const uint8_t *media_codec_information) { 925 avdtp_signaling_emit_media_codec_sbc(stream_endpoint, avdtp_cid, media_type, 926 media_codec_information, 0); 927 } 928 929 void avdtp_signaling_emit_media_codec_other_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 930 adtvp_media_codec_capabilities_t * media_codec) { 931 avdtp_signaling_emit_media_codec_other(stream_endpoint, avdtp_cid, media_codec, 0); 932 } 933 934 void avdtp_signaling_emit_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 935 avdtp_capabilities_t *configuration, uint16_t configured_service_categories) { 936 937 if (get_bit16(configured_service_categories, AVDTP_MEDIA_CODEC)){ 938 switch (configuration->media_codec.media_codec_type){ 939 case AVDTP_CODEC_SBC: 940 avdtp_signaling_emit_media_codec_sbc_configuration( 941 stream_endpoint, avdtp_cid, 942 configuration->media_codec.media_type, 943 configuration->media_codec.media_codec_information); 944 break; 945 default: 946 avdtp_signaling_emit_media_codec_other_configuration(stream_endpoint, avdtp_cid, 947 &configuration->media_codec); 948 break; 949 } 950 } 951 } 952 953 void avdtp_streaming_emit_connection_established(avdtp_stream_endpoint_t *stream_endpoint, uint8_t status) { 954 uint8_t event[14]; 955 int pos = 0; 956 event[pos++] = HCI_EVENT_AVDTP_META; 957 event[pos++] = sizeof(event) - 2; 958 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 959 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 960 pos += 2; 961 reverse_bd_addr(stream_endpoint->connection->remote_addr, &event[pos]); 962 pos += 6; 963 event[pos++] = avdtp_local_seid(stream_endpoint); 964 event[pos++] = avdtp_remote_seid(stream_endpoint); 965 event[pos++] = status; 966 967 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 968 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 969 } 970 971 void avdtp_streaming_emit_connection_released(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t local_seid) { 972 uint8_t event[6]; 973 int pos = 0; 974 event[pos++] = HCI_EVENT_AVDTP_META; 975 event[pos++] = sizeof(event) - 2; 976 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 977 little_endian_store_16(event, pos, avdtp_cid); 978 pos += 2; 979 event[pos++] = local_seid; 980 981 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 982 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 983 } 984 985 void avdtp_streaming_emit_can_send_media_packet_now(avdtp_stream_endpoint_t *stream_endpoint, uint16_t sequence_number) { 986 uint8_t event[8]; 987 int pos = 0; 988 event[pos++] = HCI_EVENT_AVDTP_META; 989 event[pos++] = sizeof(event) - 2; 990 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 991 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 992 pos += 2; 993 event[pos++] = avdtp_local_seid(stream_endpoint); 994 little_endian_store_16(event, pos, sequence_number); 995 pos += 2; 996 997 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 998 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 999 } 1000 1001 uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 1002 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1003 connection->wait_to_send_acceptor = 1; 1004 l2cap_request_can_send_now_event(l2cap_cid); 1005 return ERROR_CODE_SUCCESS; 1006 } 1007 1008 uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 1009 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1010 connection->wait_to_send_initiator = 1; 1011 l2cap_request_can_send_now_event(l2cap_cid); 1012 return ERROR_CODE_SUCCESS; 1013 } 1014 1015 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1016 if (!stream_endpoint) return 0; 1017 return stream_endpoint->sep.seid; 1018 1019 } 1020 1021 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1022 if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; 1023 return stream_endpoint->remote_sep.seid; 1024 } 1025 1026 // helper for A2DP 1027 1028 void a2dp_replace_subevent_id_and_emit_cmd(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size, uint8_t subevent_id){ 1029 UNUSED(size); 1030 btstack_assert(callback != NULL); 1031 packet[0] = HCI_EVENT_A2DP_META; 1032 packet[2] = subevent_id; 1033 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 1034 } 1035 1036 void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t subevent_id){ 1037 uint8_t event[6]; 1038 int pos = 0; 1039 event[pos++] = HCI_EVENT_A2DP_META; 1040 event[pos++] = sizeof(event) - 2; 1041 event[pos++] = subevent_id; 1042 little_endian_store_16(event, pos, cid); 1043 pos += 2; 1044 event[pos++] = local_seid; 1045 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1046 } 1047