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 SBC config used by A2DP Source 128 memset(stream_endpoint->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 default: 187 btstack_assert(false); 188 break; 189 } 190 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 191 return pos; 192 } 193 194 static bool avdtp_is_basic_capability(int service_category){ 195 return (AVDTP_MEDIA_TRANSPORT <= service_category) && (service_category <= AVDTP_MEDIA_CODEC); 196 } 197 198 int avdtp_pack_service_capabilities(uint8_t *buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category) { 199 UNUSED(size); 200 201 int i; 202 // pos = 0 reserved for length 203 int pos = 1; 204 switch(category){ 205 case AVDTP_MEDIA_TRANSPORT: 206 case AVDTP_REPORTING: 207 case AVDTP_DELAY_REPORTING: 208 break; 209 case AVDTP_RECOVERY: 210 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 211 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 212 buffer[pos++] = caps.recovery.maximum_number_media_packets; 213 break; 214 case AVDTP_CONTENT_PROTECTION: 215 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 216 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 217 pos += 2; 218 (void)memcpy(buffer + pos, caps.content_protection.cp_type_value, 219 caps.content_protection.cp_type_value_len); 220 pos += caps.content_protection.cp_type_value_len; 221 break; 222 case AVDTP_HEADER_COMPRESSION: 223 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 224 break; 225 case AVDTP_MULTIPLEXING: 226 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 227 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 228 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 229 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 230 // media, reporting. recovery 231 } 232 break; 233 case AVDTP_MEDIA_CODEC: 234 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 235 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 236 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 237 buffer[pos++] = caps.media_codec.media_codec_information[i]; 238 } 239 break; 240 default: 241 break; 242 } 243 buffer[0] = pos - 1; // length 244 return pos; 245 } 246 247 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){ 248 connection->error_code = 0; 249 250 if ((category == AVDTP_SERVICE_CATEGORY_INVALID_0) || 251 ((category == AVDTP_SERVICE_CATEGORY_INVALID_FF) && (signal_identifier == AVDTP_SI_RECONFIGURE))){ 252 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 253 connection->reject_service_category = category; 254 connection->error_code = BAD_SERV_CATEGORY; 255 return 1; 256 } 257 258 if (signal_identifier == AVDTP_SI_RECONFIGURE){ 259 if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ 260 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 261 connection->reject_service_category = category; 262 connection->error_code = INVALID_CAPABILITIES; 263 return 1; 264 } 265 } 266 267 switch(category){ 268 case AVDTP_MEDIA_TRANSPORT: 269 if (cap_len != 0){ 270 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 271 connection->reject_service_category = category; 272 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 273 return 1; 274 } 275 break; 276 case AVDTP_REPORTING: 277 case AVDTP_DELAY_REPORTING: 278 if (cap_len != 0){ 279 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 280 connection->reject_service_category = category; 281 connection->error_code = BAD_LENGTH; 282 return 1; 283 } 284 break; 285 case AVDTP_RECOVERY: 286 if (cap_len != 3){ 287 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 288 connection->reject_service_category = category; 289 connection->error_code = BAD_RECOVERY_FORMAT; 290 return 1; 291 } 292 break; 293 case AVDTP_CONTENT_PROTECTION: 294 if (cap_len < 2){ 295 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 296 connection->reject_service_category = category; 297 connection->error_code = BAD_CP_FORMAT; 298 return 1; 299 } 300 break; 301 case AVDTP_HEADER_COMPRESSION: 302 // TODO: find error code for bad header compression 303 if (cap_len != 1){ 304 log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); 305 connection->reject_service_category = category; 306 connection->error_code = BAD_RECOVERY_FORMAT; 307 return 1; 308 } 309 break; 310 case AVDTP_MULTIPLEXING: 311 break; 312 case AVDTP_MEDIA_CODEC: 313 break; 314 default: 315 break; 316 } 317 return 0; 318 } 319 320 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){ 321 322 int i; 323 324 uint16_t registered_service_categories = 0; 325 uint16_t to_process = size; 326 327 while (to_process >= 2){ 328 329 avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; 330 uint8_t cap_len = packet[1]; 331 packet += 2; 332 to_process -= 2; 333 334 if (cap_len > to_process){ 335 connection->reject_service_category = category; 336 connection->error_code = BAD_LENGTH; 337 return 0; 338 } 339 340 if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; 341 342 int category_valid = 1; 343 344 uint8_t * data = packet; 345 uint16_t pos = 0; 346 347 switch(category){ 348 case AVDTP_RECOVERY: 349 caps->recovery.recovery_type = data[pos++]; 350 caps->recovery.maximum_recovery_window_size = data[pos++]; 351 caps->recovery.maximum_number_media_packets = data[pos++]; 352 break; 353 case AVDTP_CONTENT_PROTECTION: 354 caps->content_protection.cp_type = big_endian_read_16(data, 0); 355 caps->content_protection.cp_type_value_len = cap_len - 2; 356 // connection->reject_service_category = category; 357 // connection->error_code = UNSUPPORTED_CONFIGURATION; 358 // support for content protection goes here 359 break; 360 case AVDTP_HEADER_COMPRESSION: 361 caps->header_compression.back_ch = (data[0] >> 7) & 1; 362 caps->header_compression.media = (data[0] >> 6) & 1; 363 caps->header_compression.recovery = (data[0] >> 5) & 1; 364 break; 365 case AVDTP_MULTIPLEXING: 366 caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; 367 // read [tsid, tcid] for media, reporting. recovery respectively 368 caps->multiplexing_mode.transport_identifiers_num = 3; 369 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 370 caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; 371 caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; 372 } 373 break; 374 case AVDTP_MEDIA_CODEC: 375 caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); 376 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); 377 caps->media_codec.media_codec_information_len = cap_len - 2; 378 caps->media_codec.media_codec_information = &data[pos++]; 379 break; 380 case AVDTP_MEDIA_TRANSPORT: 381 case AVDTP_REPORTING: 382 case AVDTP_DELAY_REPORTING: 383 break; 384 default: 385 category_valid = 0; 386 break; 387 } 388 389 if (category_valid) { 390 registered_service_categories = store_bit16(registered_service_categories, category, 1); 391 } 392 393 packet += cap_len; 394 to_process -= cap_len; 395 } 396 397 return registered_service_categories; 398 } 399 400 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){ 401 if (signaling_packet->offset) return; 402 bool basic_capabilities_only = false; 403 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 404 int i; 405 406 signaling_packet->size = 0; 407 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 408 409 switch (identifier) { 410 case AVDTP_SI_GET_CAPABILITIES: 411 basic_capabilities_only = true; 412 break; 413 case AVDTP_SI_GET_ALL_CAPABILITIES: 414 break; 415 case AVDTP_SI_SET_CONFIGURATION: 416 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 417 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 418 signaling_packet->message_type = AVDTP_CMD_MSG; 419 break; 420 case AVDTP_SI_RECONFIGURE: 421 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 422 signaling_packet->message_type = AVDTP_CMD_MSG; 423 break; 424 default: 425 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 426 break; 427 } 428 429 for (i = AVDTP_MEDIA_TRANSPORT; i <= AVDTP_DELAY_REPORTING; i++){ 430 int registered_category = get_bit16(service_categories, i); 431 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ 432 // TODO: introduce bitmap of mandatory categories 433 if (i == AVDTP_MEDIA_TRANSPORT){ 434 registered_category = true; 435 } 436 } 437 // AVDTP_SI_GET_CAPABILITIES reports only basic capabilities (i.e., it skips non-basic categories) 438 if (basic_capabilities_only && !avdtp_is_basic_capability(i)){ 439 registered_category = false; 440 } 441 442 if (registered_category){ 443 // service category 444 signaling_packet->command[signaling_packet->size++] = i; 445 signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command + signaling_packet->size, 446 sizeof(signaling_packet->command) - signaling_packet->size, capabilities, (avdtp_service_category_t) i); 447 } 448 } 449 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 450 signaling_packet->transaction_label = transaction_label; 451 } 452 453 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 454 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 455 int data_len = 0; 456 457 uint16_t offset = signaling_packet->offset; 458 uint16_t pos = 1; 459 460 if (offset == 0){ 461 if (signaling_packet->size <= (mtu - 2)){ 462 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 463 out_buffer[pos++] = signaling_packet->signal_identifier; 464 data_len = signaling_packet->size; 465 } else { 466 signaling_packet->packet_type = AVDTP_START_PACKET; 467 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 468 out_buffer[pos++] = signaling_packet->signal_identifier; 469 data_len = mtu - 3; 470 signaling_packet->offset = data_len; 471 } 472 } else { 473 int remaining_bytes = signaling_packet->size - offset; 474 if (remaining_bytes <= (mtu - 1)){ 475 signaling_packet->packet_type = AVDTP_END_PACKET; 476 data_len = remaining_bytes; 477 signaling_packet->offset = 0; 478 } else{ 479 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 480 data_len = mtu - 1; 481 signaling_packet->offset += data_len; 482 } 483 } 484 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 485 (void)memcpy(out_buffer + pos, signaling_packet->command + offset, 486 data_len); 487 pos += data_len; 488 return pos; 489 } 490 491 492 void avdtp_signaling_emit_connection_established(uint16_t avdtp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status) { 493 uint8_t event[14]; 494 int pos = 0; 495 event[pos++] = HCI_EVENT_AVDTP_META; 496 event[pos++] = sizeof(event) - 2; 497 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 498 little_endian_store_16(event, pos, avdtp_cid); 499 pos += 2; 500 reverse_bd_addr(addr,&event[pos]); 501 pos += 6; 502 little_endian_store_16(event, pos, con_handle); 503 pos += 2; 504 event[pos++] = status; 505 avdtp_emit_sink_and_source(event, pos); 506 } 507 508 void avdtp_signaling_emit_connection_released(uint16_t avdtp_cid) { 509 uint8_t event[5]; 510 int pos = 0; 511 event[pos++] = HCI_EVENT_AVDTP_META; 512 event[pos++] = sizeof(event) - 2; 513 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 514 little_endian_store_16(event, pos, avdtp_cid); 515 pos += 2; 516 avdtp_emit_sink_and_source(event, pos); 517 } 518 519 void avdtp_signaling_emit_sep(uint16_t avdtp_cid, avdtp_sep_t sep) { 520 uint8_t event[9]; 521 int pos = 0; 522 event[pos++] = HCI_EVENT_AVDTP_META; 523 event[pos++] = sizeof(event) - 2; 524 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 525 little_endian_store_16(event, pos, avdtp_cid); 526 pos += 2; 527 event[pos++] = sep.seid; 528 event[pos++] = sep.in_use; 529 event[pos++] = sep.media_type; 530 event[pos++] = sep.type; 531 avdtp_emit_sink_and_source(event, pos); 532 } 533 534 void avdtp_signaling_emit_sep_done(uint16_t avdtp_cid) { 535 uint8_t event[5]; 536 int pos = 0; 537 event[pos++] = HCI_EVENT_AVDTP_META; 538 event[pos++] = sizeof(event) - 2; 539 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; 540 little_endian_store_16(event, pos, avdtp_cid); 541 pos += 2; 542 avdtp_emit_sink_and_source(event, pos); 543 } 544 545 void avdtp_signaling_emit_accept(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 546 uint8_t event[8]; 547 int pos = 0; 548 event[pos++] = HCI_EVENT_AVDTP_META; 549 event[pos++] = sizeof(event) - 2; 550 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 551 little_endian_store_16(event, pos, avdtp_cid); 552 pos += 2; 553 event[pos++] = local_seid; 554 event[pos++] = is_initiator ? 1 : 0; 555 event[pos++] = identifier; 556 avdtp_emit_sink_and_source(event, pos); 557 } 558 559 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){ 560 uint8_t event[8]; 561 int pos = 0; 562 event[pos++] = HCI_EVENT_AVDTP_META; 563 event[pos++] = sizeof(event) - 2; 564 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 565 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 566 pos += 2; 567 event[pos++] = local_seid; 568 event[pos++] = is_initiator ? 1 : 0; 569 event[pos++] = identifier; 570 571 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 572 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 573 } 574 575 void avdtp_signaling_emit_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 576 uint8_t event[8]; 577 int pos = 0; 578 event[pos++] = HCI_EVENT_AVDTP_META; 579 event[pos++] = sizeof(event) - 2; 580 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 581 little_endian_store_16(event, pos, avdtp_cid); 582 pos += 2; 583 event[pos++] = local_seid; 584 event[pos++] = is_initiator ? 1 : 0; 585 event[pos++] = identifier; 586 avdtp_emit_sink_and_source(event, pos); 587 } 588 589 void avdtp_signaling_emit_general_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 590 uint8_t event[8]; 591 int pos = 0; 592 event[pos++] = HCI_EVENT_AVDTP_META; 593 event[pos++] = sizeof(event) - 2; 594 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 595 little_endian_store_16(event, pos, avdtp_cid); 596 pos += 2; 597 event[pos++] = local_seid; 598 event[pos++] = is_initiator ? 1 : 0; 599 event[pos++] = identifier; 600 avdtp_emit_sink_and_source(event, pos); 601 } 602 603 static inline void 604 avdtp_signaling_emit_capability(uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t remote_seid) { 605 uint8_t event[6]; 606 int pos = 0; 607 event[pos++] = HCI_EVENT_AVDTP_META; 608 event[pos++] = sizeof(event) - 2; 609 event[pos++] = capability_subevent_id; 610 little_endian_store_16(event, pos, avdtp_cid); 611 pos += 2; 612 event[pos++] = remote_seid; 613 avdtp_emit_sink_and_source(event, pos); 614 } 615 616 static void avdtp_signaling_emit_media_codec_sbc_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 617 uint8_t event[14]; 618 int pos = 0; 619 event[pos++] = HCI_EVENT_AVDTP_META; 620 event[pos++] = sizeof(event) - 2; 621 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 622 little_endian_store_16(event, pos, avdtp_cid); 623 pos += 2; 624 event[pos++] = remote_seid; 625 event[pos++] = media_codec.media_type; 626 event[pos++] = media_codec.media_codec_information[0] >> 4; 627 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 628 event[pos++] = media_codec.media_codec_information[1] >> 4; 629 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 630 event[pos++] = media_codec.media_codec_information[1] & 0x03; 631 event[pos++] = media_codec.media_codec_information[2]; 632 event[pos++] = media_codec.media_codec_information[3]; 633 avdtp_emit_sink_and_source(event, pos); 634 } 635 636 static void avdtp_signaling_emit_media_codec_other_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { 637 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 11]; 638 int pos = 0; 639 event[pos++] = HCI_EVENT_AVDTP_META; 640 event[pos++] = sizeof(event) - 2; 641 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 642 little_endian_store_16(event, pos, avdtp_cid); 643 pos += 2; 644 event[pos++] = remote_seid; 645 event[pos++] = media_codec.media_type; 646 little_endian_store_16(event, pos, media_codec.media_codec_type); 647 pos += 2; 648 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 649 pos += 2; 650 (void)memcpy(event + pos, media_codec.media_codec_information, 651 btstack_min(media_codec.media_codec_information_len, MAX_MEDIA_CODEC_INFORMATION_LENGTH)); 652 avdtp_emit_sink_and_source(event, pos); 653 } 654 655 static void 656 avdtp_signaling_emit_media_transport_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 657 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, 658 remote_seid); 659 } 660 661 static void avdtp_signaling_emit_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 662 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, remote_seid); 663 } 664 665 static void 666 avdtp_signaling_emit_delay_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { 667 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, 668 remote_seid); 669 } 670 671 static void avdtp_signaling_emit_recovery_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_recovery_capabilities_t *recovery) { 672 uint8_t event[9]; 673 int pos = 0; 674 event[pos++] = HCI_EVENT_AVDTP_META; 675 event[pos++] = sizeof(event) - 2; 676 event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; 677 little_endian_store_16(event, pos, avdtp_cid); 678 pos += 2; 679 event[pos++] = remote_seid; 680 event[pos++] = recovery->recovery_type; 681 event[pos++] = recovery->maximum_recovery_window_size; 682 event[pos++] = recovery->maximum_number_media_packets; 683 avdtp_emit_sink_and_source(event, pos); 684 } 685 686 static void 687 avdtp_signaling_emit_content_protection_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_content_protection_t *content_protection) { 688 uint8_t event[21]; 689 int pos = 0; 690 event[pos++] = HCI_EVENT_AVDTP_META; 691 event[pos++] = sizeof(event) - 2; 692 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; 693 little_endian_store_16(event, pos, avdtp_cid); 694 pos += 2; 695 event[pos++] = remote_seid; 696 697 little_endian_store_16(event, pos, content_protection->cp_type); 698 pos += 2; 699 little_endian_store_16(event, pos, content_protection->cp_type_value_len); 700 pos += 2; 701 702 //TODO: reserve place for value 703 if (content_protection->cp_type_value_len < 10){ 704 (void)memcpy(event + pos, content_protection->cp_type_value, 705 content_protection->cp_type_value_len); 706 } 707 avdtp_emit_sink_and_source(event, pos); 708 } 709 710 711 static void 712 avdtp_signaling_emit_header_compression_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_header_compression_capabilities_t *header_compression) { 713 uint8_t event[9]; 714 int pos = 0; 715 event[pos++] = HCI_EVENT_AVDTP_META; 716 event[pos++] = sizeof(event) - 2; 717 event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; 718 little_endian_store_16(event, pos, avdtp_cid); 719 pos += 2; 720 event[pos++] = remote_seid; 721 event[pos++] = header_compression->back_ch; 722 event[pos++] = header_compression->media; 723 event[pos++] = header_compression->recovery; 724 avdtp_emit_sink_and_source(event, pos); 725 } 726 727 static void 728 avdtp_signaling_emit_content_multiplexing_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_multiplexing_mode_capabilities_t *multiplexing_mode) { 729 uint8_t event[14]; 730 int pos = 0; 731 event[pos++] = HCI_EVENT_AVDTP_META; 732 event[pos++] = sizeof(event) - 2; 733 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; 734 little_endian_store_16(event, pos, avdtp_cid); 735 pos += 2; 736 event[pos++] = remote_seid; 737 738 event[pos++] = multiplexing_mode->fragmentation; 739 event[pos++] = multiplexing_mode->transport_identifiers_num; 740 741 int i; 742 for (i = 0; i < 3; i++){ 743 event[pos++] = multiplexing_mode->transport_session_identifiers[i]; 744 } 745 for (i = 0; i < 3; i++){ 746 event[pos++] = multiplexing_mode->tcid[i]; 747 } 748 avdtp_emit_sink_and_source(event, pos); 749 } 750 751 static void avdtp_signaling_emit_capability_done(uint16_t avdtp_cid, uint8_t remote_seid) { 752 uint8_t event[6]; 753 int pos = 0; 754 event[pos++] = HCI_EVENT_AVDTP_META; 755 event[pos++] = sizeof(event) - 2; 756 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 757 little_endian_store_16(event, pos, avdtp_cid); 758 pos += 2; 759 event[pos++] = remote_seid; 760 avdtp_emit_sink_and_source(event, pos); 761 } 762 763 // emit events for all capabilities incl. final done event 764 void avdtp_signaling_emit_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_capabilities_t *capabilities, 765 uint16_t registered_service_categories) { 766 if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ 767 switch (capabilities->media_codec.media_codec_type){ 768 case AVDTP_CODEC_SBC: 769 avdtp_signaling_emit_media_codec_sbc_capability(avdtp_cid, remote_seid, capabilities->media_codec); 770 break; 771 default: 772 avdtp_signaling_emit_media_codec_other_capability(avdtp_cid, remote_seid, capabilities->media_codec); 773 break; 774 } 775 } 776 777 if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ 778 avdtp_signaling_emit_media_transport_capability(avdtp_cid, remote_seid); 779 } 780 if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ 781 avdtp_signaling_emit_reporting_capability(avdtp_cid, remote_seid); 782 } 783 if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ 784 avdtp_signaling_emit_recovery_capability(avdtp_cid, remote_seid, &capabilities->recovery); 785 } 786 if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ 787 avdtp_signaling_emit_content_protection_capability(avdtp_cid, remote_seid, 788 &capabilities->content_protection); 789 } 790 if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ 791 avdtp_signaling_emit_header_compression_capability(avdtp_cid, remote_seid, 792 &capabilities->header_compression); 793 } 794 if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ 795 avdtp_signaling_emit_content_multiplexing_capability(avdtp_cid, remote_seid, 796 &capabilities->multiplexing_mode); 797 } 798 if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ 799 avdtp_signaling_emit_delay_reporting_capability(avdtp_cid, remote_seid); 800 } 801 avdtp_signaling_emit_capability_done(avdtp_cid, remote_seid); 802 } 803 804 static void avdtp_signaling_emit_media_codec_sbc(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 805 avdtp_media_type_t media_type, const uint8_t *media_codec_information, 806 uint8_t reconfigure) { 807 808 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 809 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 810 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 811 812 uint8_t event[16 + 2]; 813 int pos = 0; 814 event[pos++] = HCI_EVENT_AVDTP_META; 815 event[pos++] = sizeof(event) - 2; 816 817 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 818 little_endian_store_16(event, pos, avdtp_cid); 819 pos += 2; 820 event[pos++] = local_seid; 821 event[pos++] = remote_seid; 822 event[pos++] = reconfigure; 823 824 825 uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; 826 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; 827 uint8_t block_length_bitmap = media_codec_information[1] >> 4; 828 uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; 829 830 uint8_t num_channels = 0; 831 if ((channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 832 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 833 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL)) { 834 num_channels = 2; 835 } else if (channel_mode_bitmap & AVDTP_SBC_MONO) { 836 num_channels = 1; 837 } 838 839 uint16_t sampling_frequency = 0; 840 if (sampling_frequency_bitmap & AVDTP_SBC_48000) { 841 sampling_frequency = 48000; 842 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100) { 843 sampling_frequency = 44100; 844 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000) { 845 sampling_frequency = 32000; 846 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000) { 847 sampling_frequency = 16000; 848 } 849 850 uint8_t subbands = 0; 851 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 852 subbands = 8; 853 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 854 subbands = 4; 855 } 856 857 uint8_t block_length = 0; 858 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 859 block_length = 16; 860 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 861 block_length = 12; 862 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 863 block_length = 8; 864 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 865 block_length = 4; 866 } 867 868 event[pos++] = media_type; 869 little_endian_store_16(event, pos, sampling_frequency); 870 pos += 2; 871 872 event[pos++] = channel_mode_bitmap; 873 event[pos++] = num_channels; 874 event[pos++] = block_length; 875 event[pos++] = subbands; 876 event[pos++] = media_codec_information[1] & 0x03; 877 event[pos++] = media_codec_information[2]; 878 event[pos++] = media_codec_information[3]; 879 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 880 } 881 882 static void avdtp_signaling_emit_media_codec_other(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 883 adtvp_media_codec_capabilities_t * media_codec, uint8_t reconfigure) { 884 885 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 886 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 887 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 888 889 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 13]; 890 int pos = 0; 891 event[pos++] = HCI_EVENT_AVDTP_META; 892 event[pos++] = sizeof(event) - 2; 893 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 894 little_endian_store_16(event, pos, avdtp_cid); 895 pos += 2; 896 event[pos++] = local_seid; 897 event[pos++] = remote_seid; 898 event[pos++] = reconfigure; 899 event[pos++] = media_codec->media_type; 900 little_endian_store_16(event, pos, media_codec->media_codec_type); 901 pos += 2; 902 little_endian_store_16(event, pos, media_codec->media_codec_information_len); 903 pos += 2; 904 905 int media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec->media_codec_information_len); 906 (void)memcpy(event + pos, media_codec->media_codec_information, media_codec_len); 907 908 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 909 } 910 911 void avdtp_signaling_emit_delay(uint16_t avdtp_cid, uint8_t local_seid, uint16_t delay) { 912 uint8_t event[8]; 913 int pos = 0; 914 event[pos++] = HCI_EVENT_AVDTP_META; 915 event[pos++] = sizeof(event) - 2; 916 event[pos++] = AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT; 917 little_endian_store_16(event, pos, avdtp_cid); 918 pos += 2; 919 event[pos++] = local_seid; 920 little_endian_store_16(event, pos, delay); 921 pos += 2; 922 avdtp_emit_source(event, sizeof(event)); 923 } 924 925 void avdtp_signaling_emit_media_codec_sbc_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 926 avdtp_media_type_t media_type, 927 const uint8_t *media_codec_information) { 928 avdtp_signaling_emit_media_codec_sbc(stream_endpoint, avdtp_cid, media_type, 929 media_codec_information, 0); 930 } 931 932 void avdtp_signaling_emit_media_codec_other_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 933 adtvp_media_codec_capabilities_t * media_codec) { 934 avdtp_signaling_emit_media_codec_other(stream_endpoint, avdtp_cid, media_codec, 0); 935 } 936 937 void avdtp_signaling_emit_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 938 avdtp_capabilities_t *configuration, uint16_t configured_service_categories) { 939 940 if (get_bit16(configured_service_categories, AVDTP_MEDIA_CODEC)){ 941 switch (configuration->media_codec.media_codec_type){ 942 case AVDTP_CODEC_SBC: 943 avdtp_signaling_emit_media_codec_sbc_configuration( 944 stream_endpoint, avdtp_cid, 945 configuration->media_codec.media_type, 946 configuration->media_codec.media_codec_information); 947 break; 948 default: 949 avdtp_signaling_emit_media_codec_other_configuration(stream_endpoint, avdtp_cid, 950 &configuration->media_codec); 951 break; 952 } 953 } 954 } 955 956 void avdtp_streaming_emit_connection_established(avdtp_stream_endpoint_t *stream_endpoint, uint8_t status) { 957 uint8_t event[14]; 958 int pos = 0; 959 event[pos++] = HCI_EVENT_AVDTP_META; 960 event[pos++] = sizeof(event) - 2; 961 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 962 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 963 pos += 2; 964 reverse_bd_addr(stream_endpoint->connection->remote_addr, &event[pos]); 965 pos += 6; 966 event[pos++] = avdtp_local_seid(stream_endpoint); 967 event[pos++] = avdtp_remote_seid(stream_endpoint); 968 event[pos++] = status; 969 970 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 971 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 972 } 973 974 void avdtp_streaming_emit_connection_released(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t local_seid) { 975 uint8_t event[6]; 976 int pos = 0; 977 event[pos++] = HCI_EVENT_AVDTP_META; 978 event[pos++] = sizeof(event) - 2; 979 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 980 little_endian_store_16(event, pos, avdtp_cid); 981 pos += 2; 982 event[pos++] = local_seid; 983 984 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 985 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 986 } 987 988 void avdtp_streaming_emit_can_send_media_packet_now(avdtp_stream_endpoint_t *stream_endpoint, uint16_t sequence_number) { 989 uint8_t event[8]; 990 int pos = 0; 991 event[pos++] = HCI_EVENT_AVDTP_META; 992 event[pos++] = sizeof(event) - 2; 993 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 994 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 995 pos += 2; 996 event[pos++] = avdtp_local_seid(stream_endpoint); 997 little_endian_store_16(event, pos, sequence_number); 998 pos += 2; 999 1000 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1001 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1002 } 1003 1004 uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t *connection) { 1005 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1006 connection->wait_to_send_acceptor = true; 1007 l2cap_request_can_send_now_event(connection->l2cap_signaling_cid); 1008 return ERROR_CODE_SUCCESS; 1009 } 1010 1011 uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t *connection) { 1012 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1013 connection->wait_to_send_initiator = true; 1014 l2cap_request_can_send_now_event(connection->l2cap_signaling_cid); 1015 return ERROR_CODE_SUCCESS; 1016 } 1017 1018 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1019 if (!stream_endpoint) return 0; 1020 return stream_endpoint->sep.seid; 1021 1022 } 1023 1024 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1025 if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; 1026 return stream_endpoint->remote_sep.seid; 1027 } 1028 1029 // helper for A2DP 1030 1031 void a2dp_replace_subevent_id_and_emit_cmd(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size, uint8_t subevent_id){ 1032 UNUSED(size); 1033 btstack_assert(callback != NULL); 1034 // cache orig event and subevent id 1035 uint8_t orig_event_id = packet[0]; 1036 uint8_t orig_subevent_id = packet[2]; 1037 // execute callback 1038 packet[0] = HCI_EVENT_A2DP_META; 1039 packet[2] = subevent_id; 1040 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 1041 // restore id 1042 packet[0] = orig_event_id; 1043 packet[2] = orig_subevent_id; 1044 } 1045 1046 void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t subevent_id){ 1047 uint8_t event[6]; 1048 int pos = 0; 1049 event[pos++] = HCI_EVENT_A2DP_META; 1050 event[pos++] = sizeof(event) - 2; 1051 event[pos++] = subevent_id; 1052 little_endian_store_16(event, pos, cid); 1053 pos += 2; 1054 event[pos++] = local_seid; 1055 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1056 } 1057