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->connection = NULL; 114 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 115 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 116 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 117 118 stream_endpoint->sep.in_use = 0; 119 memset(&stream_endpoint->remote_sep, 0, sizeof(avdtp_sep_t)); 120 // memset(&stream_endpoint->remote_capabilities, 0, sizeof(avdtp_capabilities_t)); 121 // memset(&stream_endpoint->remote_configuration, 0, sizeof(avdtp_capabilities_t)); 122 123 stream_endpoint->remote_capabilities_bitmap = 0; 124 stream_endpoint->remote_configuration_bitmap = 0; 125 126 stream_endpoint->media_disconnect = 0; 127 stream_endpoint->media_connect = 0; 128 stream_endpoint->start_stream = 0; 129 stream_endpoint->stop_stream = 0; 130 stream_endpoint->request_can_send_now = 0; 131 stream_endpoint->abort_stream = 0; 132 stream_endpoint->suspend_stream = 0; 133 stream_endpoint->sequence_number = 0; 134 } 135 136 int get_bit16(uint16_t bitmap, int position){ 137 return (bitmap >> position) & 1; 138 } 139 140 uint16_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 141 if (value){ 142 bitmap |= 1 << position; 143 } else { 144 bitmap &= ~ (1 << position); 145 } 146 return bitmap; 147 } 148 149 avdtp_message_type_t avdtp_get_signaling_packet_type(uint8_t * packet){ 150 return (avdtp_message_type_t) (packet[0] & 0x03); 151 } 152 153 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 154 int pos = 0; 155 if (size < 2) return pos; 156 signaling_header->transaction_label = packet[pos] >> 4; 157 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 158 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 159 pos++; 160 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 161 switch (signaling_header->packet_type){ 162 case AVDTP_SINGLE_PACKET: 163 signaling_header->num_packets = 0; 164 signaling_header->offset = 0; 165 signaling_header->size = 0; 166 break; 167 case AVDTP_END_PACKET: 168 signaling_header->num_packets = 0; 169 break; 170 case AVDTP_START_PACKET: 171 signaling_header->num_packets = packet[pos++]; 172 signaling_header->size = 0; 173 signaling_header->offset = 0; 174 break; 175 case AVDTP_CONTINUE_PACKET: 176 if (signaling_header->num_packets <= 0) { 177 log_info(" ERROR: wrong num fragmented packets\n"); 178 break; 179 } 180 signaling_header->num_packets--; 181 break; 182 } 183 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 184 return pos; 185 } 186 187 static bool avdtp_is_basic_capability(int service_category){ 188 return (AVDTP_MEDIA_TRANSPORT <= service_category) && (service_category <= AVDTP_MEDIA_CODEC); 189 } 190 191 int avdtp_pack_service_capabilities(uint8_t *buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category) { 192 UNUSED(size); 193 194 int i; 195 // pos = 0 reserved for length 196 int pos = 1; 197 switch(category){ 198 case AVDTP_MEDIA_TRANSPORT: 199 case AVDTP_REPORTING: 200 case AVDTP_DELAY_REPORTING: 201 break; 202 case AVDTP_RECOVERY: 203 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 204 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 205 buffer[pos++] = caps.recovery.maximum_number_media_packets; 206 break; 207 case AVDTP_CONTENT_PROTECTION: 208 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 209 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 210 pos += 2; 211 (void)memcpy(buffer + pos, caps.content_protection.cp_type_value, 212 caps.content_protection.cp_type_value_len); 213 pos += caps.content_protection.cp_type_value_len; 214 break; 215 case AVDTP_HEADER_COMPRESSION: 216 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 217 break; 218 case AVDTP_MULTIPLEXING: 219 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 220 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 221 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 222 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 223 // media, reporting. recovery 224 } 225 break; 226 case AVDTP_MEDIA_CODEC: 227 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 228 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 229 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 230 buffer[pos++] = caps.media_codec.media_codec_information[i]; 231 } 232 break; 233 default: 234 break; 235 } 236 buffer[0] = pos - 1; // length 237 return pos; 238 } 239 240 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){ 241 connection->error_code = 0; 242 243 if ((category == AVDTP_SERVICE_CATEGORY_INVALID_0) || 244 ((category == AVDTP_SERVICE_CATEGORY_INVALID_FF) && (signal_identifier == AVDTP_SI_RECONFIGURE))){ 245 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 246 connection->reject_service_category = category; 247 connection->error_code = BAD_SERV_CATEGORY; 248 return 1; 249 } 250 251 if (signal_identifier == AVDTP_SI_RECONFIGURE){ 252 if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ 253 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 254 connection->reject_service_category = category; 255 connection->error_code = INVALID_CAPABILITIES; 256 return 1; 257 } 258 } 259 260 switch(category){ 261 case AVDTP_MEDIA_TRANSPORT: 262 if (cap_len != 0){ 263 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 264 connection->reject_service_category = category; 265 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 266 return 1; 267 } 268 break; 269 case AVDTP_REPORTING: 270 case AVDTP_DELAY_REPORTING: 271 if (cap_len != 0){ 272 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 273 connection->reject_service_category = category; 274 connection->error_code = BAD_LENGTH; 275 return 1; 276 } 277 break; 278 case AVDTP_RECOVERY: 279 if (cap_len != 3){ 280 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 281 connection->reject_service_category = category; 282 connection->error_code = BAD_RECOVERY_FORMAT; 283 return 1; 284 } 285 break; 286 case AVDTP_CONTENT_PROTECTION: 287 if (cap_len < 2){ 288 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 289 connection->reject_service_category = category; 290 connection->error_code = BAD_CP_FORMAT; 291 return 1; 292 } 293 break; 294 case AVDTP_HEADER_COMPRESSION: 295 // TODO: find error code for bad header compression 296 if (cap_len != 1){ 297 log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); 298 connection->reject_service_category = category; 299 connection->error_code = BAD_RECOVERY_FORMAT; 300 return 1; 301 } 302 break; 303 case AVDTP_MULTIPLEXING: 304 break; 305 case AVDTP_MEDIA_CODEC: 306 break; 307 default: 308 break; 309 } 310 return 0; 311 } 312 313 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){ 314 315 int i; 316 317 uint16_t registered_service_categories = 0; 318 uint16_t to_process = size; 319 320 while (to_process >= 2){ 321 322 avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; 323 uint8_t cap_len = packet[1]; 324 packet += 2; 325 to_process -= 2; 326 327 if (cap_len > to_process){ 328 connection->reject_service_category = category; 329 connection->error_code = BAD_LENGTH; 330 return 0; 331 } 332 333 if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; 334 335 int category_valid = 1; 336 337 uint8_t * data = packet; 338 uint16_t pos = 0; 339 340 switch(category){ 341 case AVDTP_RECOVERY: 342 caps->recovery.recovery_type = data[pos++]; 343 caps->recovery.maximum_recovery_window_size = data[pos++]; 344 caps->recovery.maximum_number_media_packets = data[pos++]; 345 break; 346 case AVDTP_CONTENT_PROTECTION: 347 caps->content_protection.cp_type = big_endian_read_16(data, 0); 348 caps->content_protection.cp_type_value_len = cap_len - 2; 349 // connection->reject_service_category = category; 350 // connection->error_code = UNSUPPORTED_CONFIGURATION; 351 // support for content protection goes here 352 break; 353 case AVDTP_HEADER_COMPRESSION: 354 caps->header_compression.back_ch = (data[0] >> 7) & 1; 355 caps->header_compression.media = (data[0] >> 6) & 1; 356 caps->header_compression.recovery = (data[0] >> 5) & 1; 357 break; 358 case AVDTP_MULTIPLEXING: 359 caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; 360 // read [tsid, tcid] for media, reporting. recovery respectively 361 caps->multiplexing_mode.transport_identifiers_num = 3; 362 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 363 caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; 364 caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; 365 } 366 break; 367 case AVDTP_MEDIA_CODEC: 368 caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); 369 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); 370 caps->media_codec.media_codec_information_len = cap_len - 2; 371 caps->media_codec.media_codec_information = &data[pos++]; 372 break; 373 case AVDTP_MEDIA_TRANSPORT: 374 case AVDTP_REPORTING: 375 case AVDTP_DELAY_REPORTING: 376 break; 377 default: 378 category_valid = 0; 379 break; 380 } 381 382 if (category_valid) { 383 registered_service_categories = store_bit16(registered_service_categories, category, 1); 384 } 385 386 packet += cap_len; 387 to_process -= cap_len; 388 } 389 390 return registered_service_categories; 391 } 392 393 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){ 394 if (signaling_packet->offset) return; 395 bool basic_capabilities_only = false; 396 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 397 int i; 398 399 signaling_packet->size = 0; 400 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 401 402 switch (identifier) { 403 case AVDTP_SI_GET_CAPABILITIES: 404 basic_capabilities_only = true; 405 break; 406 case AVDTP_SI_GET_ALL_CAPABILITIES: 407 break; 408 case AVDTP_SI_SET_CONFIGURATION: 409 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 410 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 411 signaling_packet->message_type = AVDTP_CMD_MSG; 412 break; 413 case AVDTP_SI_RECONFIGURE: 414 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 415 signaling_packet->message_type = AVDTP_CMD_MSG; 416 break; 417 default: 418 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 419 break; 420 } 421 422 for (i = AVDTP_MEDIA_TRANSPORT; i <= AVDTP_DELAY_REPORTING; i++){ 423 int registered_category = get_bit16(service_categories, i); 424 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ 425 // TODO: introduce bitmap of mandatory categories 426 if (i == AVDTP_MEDIA_TRANSPORT){ 427 registered_category = true; 428 } 429 } 430 // AVDTP_SI_GET_CAPABILITIES reports only basic capabilities (i.e., it skips non-basic categories) 431 if (basic_capabilities_only && !avdtp_is_basic_capability(i)){ 432 registered_category = false; 433 } 434 435 if (registered_category){ 436 // service category 437 signaling_packet->command[signaling_packet->size++] = i; 438 signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command + signaling_packet->size, 439 sizeof(signaling_packet->command) - signaling_packet->size, capabilities, (avdtp_service_category_t) i); 440 } 441 } 442 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 443 signaling_packet->transaction_label = transaction_label; 444 } 445 446 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 447 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 448 int data_len = 0; 449 450 uint16_t offset = signaling_packet->offset; 451 uint16_t pos = 1; 452 453 if (offset == 0){ 454 if (signaling_packet->size <= (mtu - 2)){ 455 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 456 out_buffer[pos++] = signaling_packet->signal_identifier; 457 data_len = signaling_packet->size; 458 } else { 459 signaling_packet->packet_type = AVDTP_START_PACKET; 460 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 461 out_buffer[pos++] = signaling_packet->signal_identifier; 462 data_len = mtu - 3; 463 signaling_packet->offset = data_len; 464 } 465 } else { 466 int remaining_bytes = signaling_packet->size - offset; 467 if (remaining_bytes <= (mtu - 1)){ 468 signaling_packet->packet_type = AVDTP_END_PACKET; 469 data_len = remaining_bytes; 470 signaling_packet->offset = 0; 471 } else{ 472 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 473 data_len = mtu - 1; 474 signaling_packet->offset += data_len; 475 } 476 } 477 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 478 (void)memcpy(out_buffer + pos, signaling_packet->command + offset, 479 data_len); 480 pos += data_len; 481 return pos; 482 } 483 484 485 void avdtp_signaling_emit_connection_established(uint16_t avdtp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status) { 486 uint8_t event[14]; 487 int pos = 0; 488 event[pos++] = HCI_EVENT_AVDTP_META; 489 event[pos++] = sizeof(event) - 2; 490 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 491 little_endian_store_16(event, pos, avdtp_cid); 492 pos += 2; 493 reverse_bd_addr(addr,&event[pos]); 494 pos += 6; 495 little_endian_store_16(event, pos, con_handle); 496 pos += 2; 497 event[pos++] = status; 498 avdtp_emit_sink_and_source(event, pos); 499 } 500 501 void avdtp_signaling_emit_connection_released(uint16_t avdtp_cid) { 502 uint8_t event[5]; 503 int pos = 0; 504 event[pos++] = HCI_EVENT_AVDTP_META; 505 event[pos++] = sizeof(event) - 2; 506 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 507 little_endian_store_16(event, pos, avdtp_cid); 508 pos += 2; 509 avdtp_emit_sink_and_source(event, pos); 510 } 511 512 void avdtp_signaling_emit_sep(uint16_t avdtp_cid, avdtp_sep_t sep) { 513 uint8_t event[9]; 514 int pos = 0; 515 event[pos++] = HCI_EVENT_AVDTP_META; 516 event[pos++] = sizeof(event) - 2; 517 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 518 little_endian_store_16(event, pos, avdtp_cid); 519 pos += 2; 520 event[pos++] = sep.seid; 521 event[pos++] = sep.in_use; 522 event[pos++] = sep.media_type; 523 event[pos++] = sep.type; 524 avdtp_emit_sink_and_source(event, pos); 525 } 526 527 void avdtp_signaling_emit_sep_done(uint16_t avdtp_cid) { 528 uint8_t event[5]; 529 int pos = 0; 530 event[pos++] = HCI_EVENT_AVDTP_META; 531 event[pos++] = sizeof(event) - 2; 532 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; 533 little_endian_store_16(event, pos, avdtp_cid); 534 pos += 2; 535 avdtp_emit_sink_and_source(event, pos); 536 } 537 538 void avdtp_signaling_emit_accept(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 539 uint8_t event[8]; 540 int pos = 0; 541 event[pos++] = HCI_EVENT_AVDTP_META; 542 event[pos++] = sizeof(event) - 2; 543 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 544 little_endian_store_16(event, pos, avdtp_cid); 545 pos += 2; 546 event[pos++] = local_seid; 547 event[pos++] = is_initiator ? 1 : 0; 548 event[pos++] = identifier; 549 avdtp_emit_sink_and_source(event, pos); 550 } 551 552 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){ 553 uint8_t event[8]; 554 int pos = 0; 555 event[pos++] = HCI_EVENT_AVDTP_META; 556 event[pos++] = sizeof(event) - 2; 557 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 558 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 559 pos += 2; 560 event[pos++] = local_seid; 561 event[pos++] = is_initiator ? 1 : 0; 562 event[pos++] = identifier; 563 564 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 565 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 566 } 567 568 void avdtp_signaling_emit_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 569 uint8_t event[8]; 570 int pos = 0; 571 event[pos++] = HCI_EVENT_AVDTP_META; 572 event[pos++] = sizeof(event) - 2; 573 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 574 little_endian_store_16(event, pos, avdtp_cid); 575 pos += 2; 576 event[pos++] = local_seid; 577 event[pos++] = is_initiator ? 1 : 0; 578 event[pos++] = identifier; 579 avdtp_emit_sink_and_source(event, pos); 580 } 581 582 void avdtp_signaling_emit_general_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 583 uint8_t event[8]; 584 int pos = 0; 585 event[pos++] = HCI_EVENT_AVDTP_META; 586 event[pos++] = sizeof(event) - 2; 587 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 588 little_endian_store_16(event, pos, avdtp_cid); 589 pos += 2; 590 event[pos++] = local_seid; 591 event[pos++] = is_initiator ? 1 : 0; 592 event[pos++] = identifier; 593 avdtp_emit_sink_and_source(event, pos); 594 } 595 596 static inline void 597 avdtp_signaling_emit_capability(uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 598 uint8_t event[7]; 599 int pos = 0; 600 event[pos++] = HCI_EVENT_AVDTP_META; 601 event[pos++] = sizeof(event) - 2; 602 event[pos++] = capability_subevent_id; 603 little_endian_store_16(event, pos, avdtp_cid); 604 pos += 2; 605 event[pos++] = local_seid; 606 event[pos++] = remote_seid; 607 avdtp_emit_sink_and_source(event, pos); 608 } 609 610 static void avdtp_signaling_emit_media_codec_sbc_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 611 adtvp_media_codec_capabilities_t media_codec) { 612 uint8_t event[15]; 613 int pos = 0; 614 event[pos++] = HCI_EVENT_AVDTP_META; 615 event[pos++] = sizeof(event) - 2; 616 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 617 little_endian_store_16(event, pos, avdtp_cid); 618 pos += 2; 619 event[pos++] = local_seid; 620 event[pos++] = remote_seid; 621 event[pos++] = media_codec.media_type; 622 event[pos++] = media_codec.media_codec_information[0] >> 4; 623 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 624 event[pos++] = media_codec.media_codec_information[1] >> 4; 625 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 626 event[pos++] = media_codec.media_codec_information[1] & 0x03; 627 event[pos++] = media_codec.media_codec_information[2]; 628 event[pos++] = media_codec.media_codec_information[3]; 629 avdtp_emit_sink_and_source(event, pos); 630 } 631 632 static void avdtp_signaling_emit_media_codec_other_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 633 adtvp_media_codec_capabilities_t media_codec) { 634 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 12]; 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++] = local_seid; 642 event[pos++] = remote_seid; 643 event[pos++] = media_codec.media_type; 644 little_endian_store_16(event, pos, media_codec.media_codec_type); 645 pos += 2; 646 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 647 pos += 2; 648 (void)memcpy(event + pos, media_codec.media_codec_information, 649 btstack_min(media_codec.media_codec_information_len, MAX_MEDIA_CODEC_INFORMATION_LENGTH)); 650 avdtp_emit_sink_and_source(event, pos); 651 } 652 653 static void 654 avdtp_signaling_emit_media_transport_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 655 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, local_seid, 656 remote_seid); 657 } 658 659 static void avdtp_signaling_emit_reporting_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 660 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, local_seid, remote_seid); 661 } 662 663 static void 664 avdtp_signaling_emit_delay_reporting_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 665 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, local_seid, 666 remote_seid); 667 } 668 669 static void avdtp_signaling_emit_recovery_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 670 avdtp_recovery_capabilities_t *recovery) { 671 uint8_t event[10]; 672 int pos = 0; 673 event[pos++] = HCI_EVENT_AVDTP_META; 674 event[pos++] = sizeof(event) - 2; 675 event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; 676 little_endian_store_16(event, pos, avdtp_cid); 677 pos += 2; 678 event[pos++] = local_seid; 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 local_seid, uint8_t remote_seid, 688 adtvp_content_protection_t *content_protection) { 689 uint8_t event[22]; 690 int pos = 0; 691 event[pos++] = HCI_EVENT_AVDTP_META; 692 event[pos++] = sizeof(event) - 2; 693 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; 694 little_endian_store_16(event, pos, avdtp_cid); 695 pos += 2; 696 event[pos++] = local_seid; 697 event[pos++] = remote_seid; 698 699 little_endian_store_16(event, pos, content_protection->cp_type); 700 pos += 2; 701 little_endian_store_16(event, pos, content_protection->cp_type_value_len); 702 pos += 2; 703 704 //TODO: reserve place for value 705 if (content_protection->cp_type_value_len < 10){ 706 (void)memcpy(event + pos, content_protection->cp_type_value, 707 content_protection->cp_type_value_len); 708 } 709 avdtp_emit_sink_and_source(event, pos); 710 } 711 712 713 static void 714 avdtp_signaling_emit_header_compression_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 715 avdtp_header_compression_capabilities_t *header_compression) { 716 uint8_t event[10]; 717 int pos = 0; 718 event[pos++] = HCI_EVENT_AVDTP_META; 719 event[pos++] = sizeof(event) - 2; 720 event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; 721 little_endian_store_16(event, pos, avdtp_cid); 722 pos += 2; 723 event[pos++] = local_seid; 724 event[pos++] = remote_seid; 725 event[pos++] = header_compression->back_ch; 726 event[pos++] = header_compression->media; 727 event[pos++] = header_compression->recovery; 728 avdtp_emit_sink_and_source(event, pos); 729 } 730 731 static void 732 avdtp_signaling_emit_content_multiplexing_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 733 avdtp_multiplexing_mode_capabilities_t *multiplexing_mode) { 734 uint8_t event[15]; 735 int pos = 0; 736 event[pos++] = HCI_EVENT_AVDTP_META; 737 event[pos++] = sizeof(event) - 2; 738 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; 739 little_endian_store_16(event, pos, avdtp_cid); 740 pos += 2; 741 event[pos++] = local_seid; 742 event[pos++] = remote_seid; 743 744 event[pos++] = multiplexing_mode->fragmentation; 745 event[pos++] = multiplexing_mode->transport_identifiers_num; 746 747 int i; 748 for (i = 0; i < 3; i++){ 749 event[pos++] = multiplexing_mode->transport_session_identifiers[i]; 750 } 751 for (i = 0; i < 3; i++){ 752 event[pos++] = multiplexing_mode->tcid[i]; 753 } 754 avdtp_emit_sink_and_source(event, pos); 755 } 756 757 static void avdtp_signaling_emit_capability_done(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 758 uint8_t event[7]; 759 int pos = 0; 760 event[pos++] = HCI_EVENT_AVDTP_META; 761 event[pos++] = sizeof(event) - 2; 762 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 763 little_endian_store_16(event, pos, avdtp_cid); 764 pos += 2; 765 event[pos++] = local_seid; 766 event[pos++] = remote_seid; 767 avdtp_emit_sink_and_source(event, pos); 768 } 769 770 // emit events for all capabilities incl. final done event 771 void avdtp_signaling_emit_capabilities(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_capabilities_t *capabilities, 772 uint16_t registered_service_categories) { 773 if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ 774 switch (capabilities->media_codec.media_codec_type){ 775 case AVDTP_CODEC_SBC: 776 avdtp_signaling_emit_media_codec_sbc_capability(avdtp_cid, local_seid, remote_seid, capabilities->media_codec); 777 break; 778 default: 779 avdtp_signaling_emit_media_codec_other_capability(avdtp_cid, local_seid, remote_seid, capabilities->media_codec); 780 break; 781 } 782 } 783 784 if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ 785 avdtp_signaling_emit_media_transport_capability(avdtp_cid, local_seid, remote_seid); 786 } 787 if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ 788 avdtp_signaling_emit_reporting_capability(avdtp_cid, local_seid, remote_seid); 789 } 790 if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ 791 avdtp_signaling_emit_recovery_capability(avdtp_cid, local_seid, remote_seid, &capabilities->recovery); 792 } 793 if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ 794 avdtp_signaling_emit_content_protection_capability(avdtp_cid, local_seid, remote_seid, 795 &capabilities->content_protection); 796 } 797 if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ 798 avdtp_signaling_emit_header_compression_capability(avdtp_cid, local_seid, remote_seid, 799 &capabilities->header_compression); 800 } 801 if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ 802 avdtp_signaling_emit_content_multiplexing_capability(avdtp_cid, local_seid, remote_seid, 803 &capabilities->multiplexing_mode); 804 } 805 if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ 806 avdtp_signaling_emit_delay_reporting_capability(avdtp_cid, local_seid, remote_seid); 807 } 808 avdtp_signaling_emit_capability_done(avdtp_cid, local_seid, remote_seid); 809 } 810 811 static void avdtp_signaling_emit_media_codec_sbc(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 812 avdtp_media_type_t media_type, const uint8_t *media_codec_information, 813 uint8_t reconfigure) { 814 815 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 816 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 817 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 818 819 uint8_t event[16 + 2]; 820 int pos = 0; 821 event[pos++] = HCI_EVENT_AVDTP_META; 822 event[pos++] = sizeof(event) - 2; 823 824 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 825 little_endian_store_16(event, pos, avdtp_cid); 826 pos += 2; 827 event[pos++] = local_seid; 828 event[pos++] = remote_seid; 829 event[pos++] = reconfigure; 830 831 832 uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; 833 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; 834 uint8_t block_length_bitmap = media_codec_information[1] >> 4; 835 uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; 836 837 uint8_t num_channels = 0; 838 if ((channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 839 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 840 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL)) { 841 num_channels = 2; 842 } else if (channel_mode_bitmap & AVDTP_SBC_MONO) { 843 num_channels = 1; 844 } 845 846 uint16_t sampling_frequency = 0; 847 if (sampling_frequency_bitmap & AVDTP_SBC_48000) { 848 sampling_frequency = 48000; 849 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100) { 850 sampling_frequency = 44100; 851 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000) { 852 sampling_frequency = 32000; 853 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000) { 854 sampling_frequency = 16000; 855 } 856 857 uint8_t subbands = 0; 858 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 859 subbands = 8; 860 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 861 subbands = 4; 862 } 863 864 uint8_t block_length = 0; 865 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 866 block_length = 16; 867 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 868 block_length = 12; 869 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 870 block_length = 8; 871 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 872 block_length = 4; 873 } 874 875 event[pos++] = media_type; 876 little_endian_store_16(event, pos, sampling_frequency); 877 pos += 2; 878 879 event[pos++] = channel_mode_bitmap; 880 event[pos++] = num_channels; 881 event[pos++] = block_length; 882 event[pos++] = subbands; 883 event[pos++] = media_codec_information[1] & 0x03; 884 event[pos++] = media_codec_information[2]; 885 event[pos++] = media_codec_information[3]; 886 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 887 } 888 889 static void avdtp_signaling_emit_media_codec_other(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 890 adtvp_media_codec_capabilities_t * media_codec, uint8_t reconfigure) { 891 892 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 893 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 894 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 895 896 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 13]; 897 int pos = 0; 898 event[pos++] = HCI_EVENT_AVDTP_META; 899 event[pos++] = sizeof(event) - 2; 900 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 901 little_endian_store_16(event, pos, avdtp_cid); 902 pos += 2; 903 event[pos++] = local_seid; 904 event[pos++] = remote_seid; 905 event[pos++] = reconfigure; 906 event[pos++] = media_codec->media_type; 907 little_endian_store_16(event, pos, media_codec->media_codec_type); 908 pos += 2; 909 little_endian_store_16(event, pos, media_codec->media_codec_information_len); 910 pos += 2; 911 912 int media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec->media_codec_information_len); 913 (void)memcpy(event + pos, media_codec->media_codec_information, media_codec_len); 914 915 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 916 } 917 918 void avdtp_signaling_emit_delay(uint16_t avdtp_cid, uint8_t local_seid, uint16_t delay) { 919 uint8_t event[8]; 920 int pos = 0; 921 event[pos++] = HCI_EVENT_AVDTP_META; 922 event[pos++] = sizeof(event) - 2; 923 event[pos++] = AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT; 924 little_endian_store_16(event, pos, avdtp_cid); 925 pos += 2; 926 event[pos++] = local_seid; 927 little_endian_store_16(event, pos, delay); 928 pos += 2; 929 avdtp_emit_source(event, sizeof(event)); 930 } 931 932 void avdtp_signaling_emit_media_codec_sbc_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 933 avdtp_media_type_t media_type, 934 const uint8_t *media_codec_information) { 935 avdtp_signaling_emit_media_codec_sbc(stream_endpoint, avdtp_cid, media_type, 936 media_codec_information, 0); 937 } 938 939 void avdtp_signaling_emit_media_codec_other_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 940 adtvp_media_codec_capabilities_t * media_codec) { 941 avdtp_signaling_emit_media_codec_other(stream_endpoint, avdtp_cid, media_codec, 0); 942 } 943 944 void avdtp_signaling_emit_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 945 avdtp_capabilities_t *configuration, uint16_t configured_service_categories) { 946 947 if (get_bit16(configured_service_categories, AVDTP_MEDIA_CODEC)){ 948 switch (configuration->media_codec.media_codec_type){ 949 case AVDTP_CODEC_SBC: 950 avdtp_signaling_emit_media_codec_sbc_configuration( 951 stream_endpoint, avdtp_cid, 952 configuration->media_codec.media_type, 953 configuration->media_codec.media_codec_information); 954 break; 955 default: 956 avdtp_signaling_emit_media_codec_other_configuration(stream_endpoint, avdtp_cid, 957 &configuration->media_codec); 958 break; 959 } 960 } 961 } 962 963 void avdtp_streaming_emit_connection_established(avdtp_stream_endpoint_t *stream_endpoint, uint8_t status) { 964 uint8_t event[14]; 965 int pos = 0; 966 event[pos++] = HCI_EVENT_AVDTP_META; 967 event[pos++] = sizeof(event) - 2; 968 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 969 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 970 pos += 2; 971 reverse_bd_addr(stream_endpoint->connection->remote_addr, &event[pos]); 972 pos += 6; 973 event[pos++] = avdtp_local_seid(stream_endpoint); 974 event[pos++] = avdtp_remote_seid(stream_endpoint); 975 event[pos++] = status; 976 977 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 978 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 979 } 980 981 void avdtp_streaming_emit_connection_released(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t local_seid) { 982 uint8_t event[6]; 983 int pos = 0; 984 event[pos++] = HCI_EVENT_AVDTP_META; 985 event[pos++] = sizeof(event) - 2; 986 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 987 little_endian_store_16(event, pos, avdtp_cid); 988 pos += 2; 989 event[pos++] = local_seid; 990 991 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 992 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 993 } 994 995 void avdtp_streaming_emit_can_send_media_packet_now(avdtp_stream_endpoint_t *stream_endpoint, uint16_t sequence_number) { 996 uint8_t event[8]; 997 int pos = 0; 998 event[pos++] = HCI_EVENT_AVDTP_META; 999 event[pos++] = sizeof(event) - 2; 1000 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 1001 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 1002 pos += 2; 1003 event[pos++] = avdtp_local_seid(stream_endpoint); 1004 little_endian_store_16(event, pos, sequence_number); 1005 pos += 2; 1006 1007 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1008 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1009 } 1010 1011 uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 1012 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1013 connection->wait_to_send_acceptor = 1; 1014 l2cap_request_can_send_now_event(l2cap_cid); 1015 return ERROR_CODE_SUCCESS; 1016 } 1017 1018 uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 1019 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1020 connection->wait_to_send_initiator = 1; 1021 l2cap_request_can_send_now_event(l2cap_cid); 1022 return ERROR_CODE_SUCCESS; 1023 } 1024 1025 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1026 if (!stream_endpoint) return 0; 1027 return stream_endpoint->sep.seid; 1028 1029 } 1030 1031 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1032 if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; 1033 return stream_endpoint->remote_sep.seid; 1034 } 1035 1036 // helper for A2DP 1037 1038 void a2dp_replace_subevent_id_and_emit_cmd(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size, uint8_t subevent_id){ 1039 UNUSED(size); 1040 btstack_assert(callback != NULL); 1041 packet[0] = HCI_EVENT_A2DP_META; 1042 packet[2] = subevent_id; 1043 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 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