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 41 #include <stdint.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #include "btstack.h" 47 #include "avdtp.h" 48 #include "avdtp_util.h" 49 50 #define MAX_MEDIA_CODEC_INFORMATION_LENGTH 100 51 52 static const char * avdtp_si_name[] = { 53 "ERROR", 54 "AVDTP_SI_DISCOVER", 55 "AVDTP_SI_GET_CAPABILITIES", 56 "AVDTP_SI_SET_CONFIGURATION", 57 "AVDTP_SI_GET_CONFIGURATION", 58 "AVDTP_SI_RECONFIGURE", 59 "AVDTP_SI_OPEN", 60 "AVDTP_SI_START", 61 "AVDTP_SI_CLOSE", 62 "AVDTP_SI_SUSPEND", 63 "AVDTP_SI_ABORT", 64 "AVDTP_SI_SECURITY_CONTROL", 65 "AVDTP_SI_GET_ALL_CAPABILITIES", 66 "AVDTP_SI_DELAY_REPORT" 67 }; 68 const char * avdtp_si2str(uint16_t index){ 69 if (index <= 0 || index > sizeof(avdtp_si_name)) return avdtp_si_name[0]; 70 return avdtp_si_name[index]; 71 } 72 73 void avdtp_initialize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 74 stream_endpoint->connection = NULL; 75 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 76 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 77 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 78 stream_endpoint->remote_sep_index = AVDTP_INVALID_SEP_INDEX; 79 stream_endpoint->media_disconnect = 0; 80 stream_endpoint->sep.in_use = 0; 81 stream_endpoint->remote_sep_index = 0; 82 } 83 84 avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_seid(uint16_t seid, avdtp_context_t * context){ 85 btstack_linked_list_iterator_t it; 86 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 87 while (btstack_linked_list_iterator_has_next(&it)){ 88 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 89 if (stream_endpoint->sep.seid == seid){ 90 return stream_endpoint; 91 } 92 } 93 return NULL; 94 } 95 96 avdtp_connection_t * avdtp_connection_for_bd_addr(bd_addr_t addr, avdtp_context_t * context){ 97 btstack_linked_list_iterator_t it; 98 btstack_linked_list_iterator_init(&it, &context->connections); 99 while (btstack_linked_list_iterator_has_next(&it)){ 100 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 101 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 102 return connection; 103 } 104 return NULL; 105 } 106 107 avdtp_connection_t * avdtp_connection_for_avdtp_cid(uint16_t avdtp_cid, avdtp_context_t * context){ 108 btstack_linked_list_iterator_t it; 109 btstack_linked_list_iterator_init(&it, &context->connections); 110 while (btstack_linked_list_iterator_has_next(&it)){ 111 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 112 if (connection->avdtp_cid != avdtp_cid) continue; 113 return connection; 114 } 115 return NULL; 116 } 117 118 avdtp_connection_t * avdtp_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid, avdtp_context_t * context){ 119 btstack_linked_list_iterator_t it; 120 btstack_linked_list_iterator_init(&it, &context->connections); 121 while (btstack_linked_list_iterator_has_next(&it)){ 122 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 123 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 124 return connection; 125 } 126 return NULL; 127 } 128 129 avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_l2cap_cid(uint16_t l2cap_cid, avdtp_context_t * context){ 130 btstack_linked_list_iterator_t it; 131 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 132 while (btstack_linked_list_iterator_has_next(&it)){ 133 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 134 if (stream_endpoint->l2cap_media_cid == l2cap_cid){ 135 return stream_endpoint; 136 } 137 if (stream_endpoint->l2cap_reporting_cid == l2cap_cid){ 138 return stream_endpoint; 139 } 140 if (stream_endpoint->l2cap_recovery_cid == l2cap_cid){ 141 return stream_endpoint; 142 } 143 } 144 return NULL; 145 } 146 147 avdtp_stream_endpoint_t * avdtp_stream_endpoint_with_seid(uint8_t seid, avdtp_context_t * context){ 148 btstack_linked_list_iterator_t it; 149 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 150 while (btstack_linked_list_iterator_has_next(&it)){ 151 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 152 if (stream_endpoint->sep.seid == seid){ 153 return stream_endpoint; 154 } 155 } 156 return NULL; 157 } 158 159 avdtp_stream_endpoint_t * avdtp_stream_endpoint_associated_with_acp_seid(uint16_t acp_seid, avdtp_context_t * context){ 160 btstack_linked_list_iterator_t it; 161 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 162 while (btstack_linked_list_iterator_has_next(&it)){ 163 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 164 165 if (stream_endpoint->remote_sep_index != AVDTP_INVALID_SEP_INDEX){ 166 if (!stream_endpoint->connection) continue; 167 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == acp_seid){ 168 return stream_endpoint; 169 } 170 } 171 } 172 return NULL; 173 } 174 175 int get_bit16(uint16_t bitmap, int position){ 176 return (bitmap >> position) & 1; 177 } 178 179 uint8_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 180 if (value){ 181 bitmap |= 1 << position; 182 } else { 183 bitmap &= ~ (1 << position); 184 } 185 return bitmap; 186 } 187 188 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 189 int pos = 0; 190 if (size < 2) return pos; 191 signaling_header->transaction_label = packet[pos] >> 4; 192 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 193 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 194 pos++; 195 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 196 switch (signaling_header->packet_type){ 197 case AVDTP_SINGLE_PACKET: 198 signaling_header->num_packets = 0; 199 signaling_header->offset = 0; 200 signaling_header->size = 0; 201 break; 202 case AVDTP_END_PACKET: 203 signaling_header->num_packets = 0; 204 break; 205 case AVDTP_START_PACKET: 206 signaling_header->num_packets = packet[pos++]; 207 signaling_header->size = 0; 208 signaling_header->offset = 0; 209 break; 210 case AVDTP_CONTINUE_PACKET: 211 if (signaling_header->num_packets <= 0) { 212 log_info(" ERROR: wrong num fragmented packets\n"); 213 break; 214 } 215 signaling_header->num_packets--; 216 break; 217 } 218 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 219 return pos; 220 } 221 222 int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){ 223 UNUSED(size); 224 225 int i; 226 // pos = 0 reserved for length 227 int pos = 1; 228 switch(category){ 229 case AVDTP_MEDIA_TRANSPORT: 230 case AVDTP_REPORTING: 231 break; 232 case AVDTP_DELAY_REPORTING: 233 if (!pack_all_capabilities) break; 234 break; 235 case AVDTP_RECOVERY: 236 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 237 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 238 buffer[pos++] = caps.recovery.maximum_number_media_packets; 239 break; 240 case AVDTP_CONTENT_PROTECTION: 241 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 242 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 243 pos += 2; 244 memcpy(buffer+pos, caps.content_protection.cp_type_value, caps.content_protection.cp_type_value_len); 245 break; 246 case AVDTP_HEADER_COMPRESSION: 247 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 248 break; 249 case AVDTP_MULTIPLEXING: 250 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 251 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 252 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 253 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 254 // media, reporting. recovery 255 } 256 break; 257 case AVDTP_MEDIA_CODEC: 258 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 259 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 260 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 261 buffer[pos++] = caps.media_codec.media_codec_information[i]; 262 } 263 break; 264 default: 265 break; 266 } 267 buffer[0] = pos - 1; // length 268 return pos; 269 } 270 271 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_service_category_t category, uint8_t cap_len){ 272 connection->error_code = 0; 273 274 if (category == AVDTP_SERVICE_CATEGORY_INVALID_0 || 275 (category == AVDTP_SERVICE_CATEGORY_INVALID_FF && connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE)){ 276 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 277 connection->reject_service_category = category; 278 connection->error_code = BAD_SERV_CATEGORY; 279 return 1; 280 } 281 282 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 283 if (category != AVDTP_CONTENT_PROTECTION && category != AVDTP_MEDIA_CODEC){ 284 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 285 connection->reject_service_category = category; 286 connection->error_code = INVALID_CAPABILITIES; 287 return 1; 288 } 289 } 290 291 switch(category){ 292 case AVDTP_MEDIA_TRANSPORT: 293 if (cap_len != 0){ 294 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 295 connection->reject_service_category = category; 296 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 297 return 1; 298 } 299 break; 300 case AVDTP_REPORTING: 301 case AVDTP_DELAY_REPORTING: 302 if (cap_len != 0){ 303 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 304 connection->reject_service_category = category; 305 connection->error_code = BAD_LENGTH; 306 return 1; 307 } 308 break; 309 case AVDTP_RECOVERY: 310 if (cap_len < 3){ 311 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 312 connection->reject_service_category = category; 313 connection->error_code = BAD_RECOVERY_FORMAT; 314 return 1; 315 } 316 break; 317 case AVDTP_CONTENT_PROTECTION: 318 if (cap_len < 2){ 319 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 320 connection->reject_service_category = category; 321 connection->error_code = BAD_CP_FORMAT; 322 return 1; 323 } 324 break; 325 case AVDTP_HEADER_COMPRESSION: 326 break; 327 case AVDTP_MULTIPLEXING: 328 break; 329 case AVDTP_MEDIA_CODEC: 330 break; 331 default: 332 break; 333 } 334 return 0; 335 } 336 337 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 338 if (size == 0) return 0; 339 340 uint16_t registered_service_categories = 0; 341 int pos = 0; 342 int i; 343 avdtp_service_category_t category = (avdtp_service_category_t)packet[pos++]; 344 uint8_t cap_len = packet[pos++]; 345 346 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 347 int processed_cap_len = 0; 348 int rfa = 0; 349 350 while (pos < size){ 351 if (cap_len > size - pos){ 352 connection->reject_service_category = category; 353 connection->error_code = BAD_LENGTH; 354 return 0; 355 } 356 rfa = 0; 357 processed_cap_len = pos; 358 switch(category){ 359 case AVDTP_RECOVERY: 360 caps->recovery.recovery_type = packet[pos++]; 361 caps->recovery.maximum_recovery_window_size = packet[pos++]; 362 caps->recovery.maximum_number_media_packets = packet[pos++]; 363 break; 364 case AVDTP_CONTENT_PROTECTION: 365 caps->content_protection.cp_type = big_endian_read_16(packet, pos); 366 pos+=2; 367 368 caps->content_protection.cp_type_value_len = cap_len - 2; 369 pos += caps->content_protection.cp_type_value_len; 370 371 // connection->reject_service_category = category; 372 // connection->error_code = UNSUPPORTED_CONFIGURATION; 373 // support for content protection goes here 374 break; 375 376 case AVDTP_HEADER_COMPRESSION: 377 caps->header_compression.back_ch = packet[pos] >> 7; 378 caps->header_compression.media = packet[pos] >> 6; 379 caps->header_compression.recovery = packet[pos] >> 5; 380 pos++; 381 break; 382 case AVDTP_MULTIPLEXING: 383 caps->multiplexing_mode.fragmentation = packet[pos++] >> 7; 384 // read [tsid, tcid] for media, reporting. recovery respectively 385 caps->multiplexing_mode.transport_identifiers_num = 3; 386 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 387 caps->multiplexing_mode.transport_session_identifiers[i] = packet[pos++] >> 7; 388 caps->multiplexing_mode.tcid[i] = packet[pos++] >> 7; 389 } 390 break; 391 case AVDTP_MEDIA_CODEC: 392 caps->media_codec.media_type = (avdtp_media_type_t)(packet[pos++] >> 4); 393 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(packet[pos++]); 394 caps->media_codec.media_codec_information_len = cap_len - 2; 395 caps->media_codec.media_codec_information = &packet[pos]; 396 pos += caps->media_codec.media_codec_information_len; 397 break; 398 case AVDTP_MEDIA_TRANSPORT: 399 case AVDTP_REPORTING: 400 case AVDTP_DELAY_REPORTING: 401 pos += cap_len; 402 break; 403 default: 404 pos += cap_len; 405 rfa = 1; 406 break; 407 } 408 processed_cap_len = pos - processed_cap_len; 409 410 if (cap_len == processed_cap_len){ 411 if (!rfa) { 412 registered_service_categories = store_bit16(registered_service_categories, category, 1); 413 } 414 if (pos < size-2){ 415 //int old_pos = pos; 416 category = (avdtp_service_category_t)packet[pos++]; 417 cap_len = packet[pos++]; 418 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 419 } 420 } 421 } 422 return registered_service_categories; 423 } 424 425 void avdtp_prepare_capabilities(avdtp_signaling_packet_t * signaling_packet, uint8_t transaction_label, uint16_t registered_service_categories, avdtp_capabilities_t capabilities, uint8_t identifier){ 426 if (signaling_packet->offset) return; 427 uint8_t pack_all_capabilities = 1; 428 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 429 int i; 430 431 signaling_packet->size = 0; 432 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 433 434 435 switch (identifier) { 436 case AVDTP_SI_GET_CAPABILITIES: 437 pack_all_capabilities = 0; 438 break; 439 case AVDTP_SI_GET_ALL_CAPABILITIES: 440 pack_all_capabilities = 1; 441 break; 442 case AVDTP_SI_SET_CONFIGURATION: 443 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 444 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 445 signaling_packet->message_type = AVDTP_CMD_MSG; 446 break; 447 case AVDTP_SI_RECONFIGURE: 448 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 449 signaling_packet->message_type = AVDTP_CMD_MSG; 450 break; 451 default: 452 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 453 break; 454 } 455 456 for (i = 1; i < 9; i++){ 457 int registered_category = get_bit16(registered_service_categories, i); 458 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION || identifier == AVDTP_SI_RECONFIGURE)){ 459 // TODO: introduce bitmap of mandatory categories 460 if (i == 1){ 461 registered_category = 1; 462 } 463 } 464 if (registered_category){ 465 // service category 466 signaling_packet->command[signaling_packet->size++] = i; 467 signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command+signaling_packet->size, sizeof(signaling_packet->command)-signaling_packet->size, capabilities, (avdtp_service_category_t)i, pack_all_capabilities); 468 } 469 } 470 471 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 472 signaling_packet->transaction_label = transaction_label; 473 } 474 475 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 476 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 477 int data_len = 0; 478 479 uint16_t offset = signaling_packet->offset; 480 uint16_t pos = 1; 481 482 if (offset == 0){ 483 if (signaling_packet->size <= mtu - 2){ 484 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 485 out_buffer[pos++] = signaling_packet->signal_identifier; 486 data_len = signaling_packet->size; 487 } else { 488 signaling_packet->packet_type = AVDTP_START_PACKET; 489 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 490 out_buffer[pos++] = signaling_packet->signal_identifier; 491 data_len = mtu - 3; 492 signaling_packet->offset = data_len; 493 } 494 } else { 495 int remaining_bytes = signaling_packet->size - offset; 496 if (remaining_bytes <= mtu - 1){ 497 signaling_packet->packet_type = AVDTP_END_PACKET; 498 data_len = remaining_bytes; 499 signaling_packet->offset = 0; 500 } else{ 501 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 502 data_len = mtu - 1; 503 signaling_packet->offset += data_len; 504 } 505 } 506 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 507 memcpy(out_buffer+pos, signaling_packet->command + offset, data_len); 508 pos += data_len; 509 return pos; 510 } 511 512 513 void avdtp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t avdtp_cid, bd_addr_t addr, uint8_t status){ 514 if (!callback) return; 515 uint8_t event[12]; 516 int pos = 0; 517 event[pos++] = HCI_EVENT_AVDTP_META; 518 event[pos++] = sizeof(event) - 2; 519 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 520 little_endian_store_16(event, pos, avdtp_cid); 521 pos += 2; 522 reverse_bd_addr(addr,&event[pos]); 523 pos += 6; 524 event[pos++] = status; 525 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 526 } 527 528 void avdtp_streaming_emit_can_send_media_packet_now(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t seid, uint16_t sequence_number){ 529 if (!callback) return; 530 uint8_t event[8]; 531 int pos = 0; 532 event[pos++] = HCI_EVENT_AVDTP_META; 533 event[pos++] = sizeof(event) - 2; 534 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 535 little_endian_store_16(event, pos, avdtp_cid); 536 pos += 2; 537 event[pos++] = seid; 538 little_endian_store_16(event, pos, sequence_number); 539 pos += 2; 540 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 541 } 542 543 void avdtp_signaling_emit_connection_released(btstack_packet_handler_t callback, uint16_t avdtp_cid){ 544 if (!callback) return; 545 uint8_t event[5]; 546 int pos = 0; 547 event[pos++] = HCI_EVENT_AVDTP_META; 548 event[pos++] = sizeof(event) - 2; 549 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 550 little_endian_store_16(event, pos, avdtp_cid); 551 pos += 2; 552 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 553 } 554 555 void avdtp_streaming_emit_connection_released(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid){ 556 if (!callback) return; 557 uint8_t event[6]; 558 int pos = 0; 559 event[pos++] = HCI_EVENT_AVDTP_META; 560 event[pos++] = sizeof(event) - 2; 561 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 562 little_endian_store_16(event, pos, avdtp_cid); 563 pos += 2; 564 event[pos++] = local_seid; 565 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 566 } 567 568 void avdtp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint8_t status){ 569 if (!callback) return; 570 uint8_t event[8]; 571 int pos = 0; 572 event[pos++] = HCI_EVENT_AVDTP_META; 573 event[pos++] = sizeof(event) - 2; 574 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 575 little_endian_store_16(event, pos, avdtp_cid); 576 pos += 2; 577 event[pos++] = local_seid; 578 event[pos++] = remote_seid; 579 event[pos++] = status; 580 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 581 } 582 583 void avdtp_signaling_emit_sep(btstack_packet_handler_t callback, uint16_t avdtp_cid, avdtp_sep_t sep){ 584 if (!callback) return; 585 uint8_t event[9]; 586 int pos = 0; 587 event[pos++] = HCI_EVENT_AVDTP_META; 588 event[pos++] = sizeof(event) - 2; 589 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 590 little_endian_store_16(event, pos, avdtp_cid); 591 pos += 2; 592 event[pos++] = sep.seid; 593 event[pos++] = sep.in_use; 594 event[pos++] = sep.media_type; 595 event[pos++] = sep.type; 596 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 597 } 598 599 void avdtp_signaling_emit_accept(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier){ 600 if (!callback) return; 601 uint8_t event[7]; 602 int pos = 0; 603 event[pos++] = HCI_EVENT_AVDTP_META; 604 event[pos++] = sizeof(event) - 2; 605 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 606 little_endian_store_16(event, pos, avdtp_cid); 607 pos += 2; 608 event[pos++] = local_seid; 609 event[pos++] = identifier; 610 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 611 } 612 613 void avdtp_signaling_emit_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier){ 614 if (!callback) return; 615 uint8_t event[7]; 616 int pos = 0; 617 event[pos++] = HCI_EVENT_AVDTP_META; 618 event[pos++] = sizeof(event) - 2; 619 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 620 little_endian_store_16(event, pos, avdtp_cid); 621 pos += 2; 622 event[pos++] = local_seid; 623 event[pos++] = identifier; 624 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 625 } 626 627 void avdtp_signaling_emit_general_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier){ 628 if (!callback) return; 629 uint8_t event[7]; 630 int pos = 0; 631 event[pos++] = HCI_EVENT_AVDTP_META; 632 event[pos++] = sizeof(event) - 2; 633 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 634 little_endian_store_16(event, pos, avdtp_cid); 635 pos += 2; 636 event[pos++] = local_seid; 637 event[pos++] = identifier; 638 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 639 } 640 641 void avdtp_signaling_emit_media_codec_sbc_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 642 if (!callback) return; 643 uint8_t event[15]; 644 int pos = 0; 645 event[pos++] = HCI_EVENT_AVDTP_META; 646 event[pos++] = sizeof(event) - 2; 647 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 648 little_endian_store_16(event, pos, avdtp_cid); 649 pos += 2; 650 event[pos++] = local_seid; 651 event[pos++] = remote_seid; 652 event[pos++] = media_codec.media_type; 653 event[pos++] = media_codec.media_codec_information[0] >> 4; 654 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 655 event[pos++] = media_codec.media_codec_information[1] >> 4; 656 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 657 event[pos++] = media_codec.media_codec_information[1] & 0x03; 658 event[pos++] = media_codec.media_codec_information[2]; 659 event[pos++] = media_codec.media_codec_information[3]; 660 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 661 } 662 663 void avdtp_signaling_emit_media_codec_other_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 664 if (!callback) return; 665 uint8_t event[111]; 666 int pos = 0; 667 event[pos++] = HCI_EVENT_AVDTP_META; 668 event[pos++] = sizeof(event) - 2; 669 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 670 little_endian_store_16(event, pos, avdtp_cid); 671 pos += 2; 672 event[pos++] = local_seid; 673 event[pos++] = remote_seid; 674 event[pos++] = media_codec.media_type; 675 little_endian_store_16(event, pos, media_codec.media_codec_type); 676 pos += 2; 677 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 678 pos += 2; 679 if (media_codec.media_codec_information_len < 100){ 680 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 681 } else { 682 memcpy(event+pos, media_codec.media_codec_information, 100); 683 } 684 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 685 } 686 687 static inline void avdtp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec, uint8_t reconfigure){ 688 if (!callback) return; 689 uint8_t event[16+2]; 690 int pos = 0; 691 event[pos++] = HCI_EVENT_AVDTP_META; 692 event[pos++] = sizeof(event) - 2; 693 694 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 695 little_endian_store_16(event, pos, avdtp_cid); 696 pos += 2; 697 event[pos++] = local_seid; 698 event[pos++] = remote_seid; 699 event[pos++] = reconfigure; 700 701 uint8_t num_channels = 0; 702 uint16_t sampling_frequency = 0; 703 uint8_t subbands = 0; 704 uint8_t block_length = 0; 705 706 uint8_t sampling_frequency_bitmap = media_codec.media_codec_information[0] >> 4; 707 uint8_t channel_mode_bitmap = media_codec.media_codec_information[0] & 0x0F; 708 uint8_t block_length_bitmap = media_codec.media_codec_information[1] >> 4; 709 uint8_t subbands_bitmap = (media_codec.media_codec_information[1] & 0x0F) >> 2; 710 711 if (channel_mode_bitmap & AVDTP_SBC_MONO){ 712 num_channels = 1; 713 } 714 if ( (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 715 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 716 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL) ){ 717 num_channels = 2; 718 } 719 720 if (sampling_frequency_bitmap & AVDTP_SBC_16000){ 721 sampling_frequency = 16000; 722 } 723 if (sampling_frequency_bitmap & AVDTP_SBC_32000){ 724 sampling_frequency = 32000; 725 } 726 if (sampling_frequency_bitmap & AVDTP_SBC_44100){ 727 sampling_frequency = 44100; 728 } 729 if (sampling_frequency_bitmap & AVDTP_SBC_48000){ 730 sampling_frequency = 48000; 731 } 732 733 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 734 subbands = 4; 735 } 736 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 737 subbands = 8; 738 } 739 740 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 741 block_length = 4; 742 } 743 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 744 block_length = 8; 745 } 746 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 747 block_length = 12; 748 } 749 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 750 block_length = 16; 751 } 752 753 event[pos++] = media_codec.media_type; 754 little_endian_store_16(event, pos, sampling_frequency); 755 pos += 2; 756 757 event[pos++] = channel_mode_bitmap; 758 event[pos++] = num_channels; 759 event[pos++] = block_length; 760 event[pos++] = subbands; 761 event[pos++] = media_codec.media_codec_information[1] & 0x03; 762 event[pos++] = media_codec.media_codec_information[2]; 763 event[pos++] = media_codec.media_codec_information[3]; 764 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 765 } 766 767 void avdtp_signaling_emit_media_codec_sbc_configuration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 768 if (!callback) return; 769 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, local_seid, remote_seid, media_codec, 0); 770 } 771 772 void avdtp_signaling_emit_media_codec_sbc_reconfiguration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 773 if (!callback) return; 774 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, local_seid, remote_seid, media_codec, 1); 775 } 776 777 static inline void avdtp_signaling_emit_media_codec_other(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec, uint8_t reconfigure){ 778 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 13]; 779 int pos = 0; 780 event[pos++] = HCI_EVENT_AVDTP_META; 781 event[pos++] = sizeof(event) - 2; 782 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 783 little_endian_store_16(event, pos, avdtp_cid); 784 pos += 2; 785 event[pos++] = local_seid; 786 event[pos++] = remote_seid; 787 event[pos++] = reconfigure; 788 event[pos++] = media_codec.media_type; 789 little_endian_store_16(event, pos, media_codec.media_codec_type); 790 pos += 2; 791 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 792 pos += 2; 793 794 int media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec.media_codec_information_len); 795 memcpy(event+pos, media_codec.media_codec_information, media_codec_len); 796 797 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 798 } 799 800 void avdtp_signaling_emit_media_codec_other_configuration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 801 if (!callback) return; 802 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, local_seid, remote_seid, media_codec, 0); 803 } 804 805 void avdtp_signaling_emit_media_codec_other_reconfiguration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ 806 if (!callback) return; 807 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, local_seid, remote_seid, media_codec, 1); 808 } 809 810 811 void avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 812 connection->wait_to_send_acceptor = 1; 813 l2cap_request_can_send_now_event(l2cap_cid); 814 } 815 void avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 816 connection->wait_to_send_initiator = 1; 817 l2cap_request_can_send_now_event(l2cap_cid); 818 } 819 void avdtp_request_can_send_now_self(avdtp_connection_t * connection, uint16_t l2cap_cid){ 820 connection->wait_to_send_self = 1; 821 l2cap_request_can_send_now_event(l2cap_cid); 822 } 823 824 uint8_t avdtp_get_index_of_remote_stream_endpoint_with_seid(avdtp_stream_endpoint_t * stream_endpoint, uint16_t seid){ 825 if (!stream_endpoint->connection) return AVDTP_INVALID_SEP_INDEX; 826 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == seid){ 827 return stream_endpoint->remote_sep_index; 828 } 829 int i; 830 for (i=0; i < stream_endpoint->connection->remote_seps_num; i++){ 831 if (stream_endpoint->connection->remote_seps[i].seid == seid){ 832 return i; 833 } 834 } 835 return AVDTP_INVALID_SEP_INDEX; 836 } 837 838 uint8_t avdtp_find_remote_sep(avdtp_connection_t * connection, uint8_t remote_seid){ 839 if (!connection) return AVDTP_INVALID_SEP_INDEX; 840 int i; 841 for (i = 0; i < connection->remote_seps_num; i++){ 842 if (connection->remote_seps[i].seid == remote_seid){ 843 return i; 844 } 845 } 846 return AVDTP_INVALID_SEP_INDEX; 847 } 848 849 850 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 851 if (!stream_endpoint) return 0; 852 return stream_endpoint->sep.seid; 853 854 } 855 856 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 857 if (!stream_endpoint) return 0; 858 if (!stream_endpoint->connection) return 0; 859 return stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid; 860 } 861