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_for_signaling_cid(uint16_t l2cap_cid, 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->connection){ 153 if (stream_endpoint->connection->l2cap_signaling_cid == l2cap_cid){ 154 return stream_endpoint; 155 } 156 } 157 } 158 return NULL; 159 } 160 161 avdtp_stream_endpoint_t * avdtp_stream_endpoint_with_seid(uint8_t seid, avdtp_context_t * context){ 162 btstack_linked_list_iterator_t it; 163 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 164 while (btstack_linked_list_iterator_has_next(&it)){ 165 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 166 if (stream_endpoint->sep.seid == seid){ 167 return stream_endpoint; 168 } 169 } 170 return NULL; 171 } 172 173 avdtp_stream_endpoint_t * avdtp_stream_endpoint_associated_with_acp_seid(uint16_t acp_seid, avdtp_context_t * context){ 174 btstack_linked_list_iterator_t it; 175 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 176 while (btstack_linked_list_iterator_has_next(&it)){ 177 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 178 179 if (stream_endpoint->remote_sep_index != AVDTP_INVALID_SEP_INDEX){ 180 if (!stream_endpoint->connection) continue; 181 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == acp_seid){ 182 return stream_endpoint; 183 } 184 } 185 } 186 return NULL; 187 } 188 189 int get_bit16(uint16_t bitmap, int position){ 190 return (bitmap >> position) & 1; 191 } 192 193 uint8_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 194 if (value){ 195 bitmap |= 1 << position; 196 } else { 197 bitmap &= ~ (1 << position); 198 } 199 return bitmap; 200 } 201 202 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 203 int pos = 0; 204 if (size < 2) return pos; 205 signaling_header->transaction_label = packet[pos] >> 4; 206 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 207 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 208 pos++; 209 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 210 switch (signaling_header->packet_type){ 211 case AVDTP_SINGLE_PACKET: 212 signaling_header->num_packets = 0; 213 signaling_header->offset = 0; 214 signaling_header->size = 0; 215 break; 216 case AVDTP_END_PACKET: 217 signaling_header->num_packets = 0; 218 break; 219 case AVDTP_START_PACKET: 220 signaling_header->num_packets = packet[pos++]; 221 signaling_header->size = 0; 222 signaling_header->offset = 0; 223 break; 224 case AVDTP_CONTINUE_PACKET: 225 if (signaling_header->num_packets <= 0) { 226 log_info(" ERROR: wrong num fragmented packets\n"); 227 break; 228 } 229 signaling_header->num_packets--; 230 break; 231 } 232 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 233 return pos; 234 } 235 236 int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){ 237 UNUSED(size); 238 239 int i; 240 // pos = 0 reserved for length 241 int pos = 1; 242 switch(category){ 243 case AVDTP_MEDIA_TRANSPORT: 244 case AVDTP_REPORTING: 245 break; 246 case AVDTP_DELAY_REPORTING: 247 if (!pack_all_capabilities) break; 248 break; 249 case AVDTP_RECOVERY: 250 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 251 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 252 buffer[pos++] = caps.recovery.maximum_number_media_packets; 253 break; 254 case AVDTP_CONTENT_PROTECTION: 255 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 256 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 257 pos += 2; 258 memcpy(buffer+pos, caps.content_protection.cp_type_value, caps.content_protection.cp_type_value_len); 259 break; 260 case AVDTP_HEADER_COMPRESSION: 261 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 262 break; 263 case AVDTP_MULTIPLEXING: 264 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 265 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 266 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 267 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 268 // media, reporting. recovery 269 } 270 break; 271 case AVDTP_MEDIA_CODEC: 272 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 273 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 274 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 275 buffer[pos++] = caps.media_codec.media_codec_information[i]; 276 } 277 break; 278 default: 279 break; 280 } 281 buffer[0] = pos - 1; // length 282 return pos; 283 } 284 285 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_service_category_t category, uint8_t cap_len){ 286 connection->error_code = 0; 287 288 if (category == AVDTP_SERVICE_CATEGORY_INVALID_0 || 289 (category == AVDTP_SERVICE_CATEGORY_INVALID_FF && connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE)){ 290 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 291 connection->reject_service_category = category; 292 connection->error_code = BAD_SERV_CATEGORY; 293 return 1; 294 } 295 296 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 297 if (category != AVDTP_CONTENT_PROTECTION && category != AVDTP_MEDIA_CODEC){ 298 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 299 connection->reject_service_category = category; 300 connection->error_code = INVALID_CAPABILITIES; 301 return 1; 302 } 303 } 304 305 switch(category){ 306 case AVDTP_MEDIA_TRANSPORT: 307 if (cap_len != 0){ 308 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 309 connection->reject_service_category = category; 310 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 311 return 1; 312 } 313 break; 314 case AVDTP_REPORTING: 315 case AVDTP_DELAY_REPORTING: 316 if (cap_len != 0){ 317 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 318 connection->reject_service_category = category; 319 connection->error_code = BAD_LENGTH; 320 return 1; 321 } 322 break; 323 case AVDTP_RECOVERY: 324 if (cap_len < 3){ 325 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 326 connection->reject_service_category = category; 327 connection->error_code = BAD_RECOVERY_FORMAT; 328 return 1; 329 } 330 break; 331 case AVDTP_CONTENT_PROTECTION: 332 if (cap_len < 2){ 333 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 334 connection->reject_service_category = category; 335 connection->error_code = BAD_CP_FORMAT; 336 return 1; 337 } 338 break; 339 case AVDTP_HEADER_COMPRESSION: 340 break; 341 case AVDTP_MULTIPLEXING: 342 break; 343 case AVDTP_MEDIA_CODEC: 344 break; 345 default: 346 break; 347 } 348 return 0; 349 } 350 351 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 352 if (size == 0) return 0; 353 354 uint16_t registered_service_categories = 0; 355 int pos = 0; 356 int i; 357 avdtp_service_category_t category = (avdtp_service_category_t)packet[pos++]; 358 uint8_t cap_len = packet[pos++]; 359 360 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 361 int processed_cap_len = 0; 362 int rfa = 0; 363 364 while (pos < size){ 365 if (cap_len > size - pos){ 366 connection->reject_service_category = category; 367 connection->error_code = BAD_LENGTH; 368 return 0; 369 } 370 rfa = 0; 371 processed_cap_len = pos; 372 switch(category){ 373 case AVDTP_RECOVERY: 374 caps->recovery.recovery_type = packet[pos++]; 375 caps->recovery.maximum_recovery_window_size = packet[pos++]; 376 caps->recovery.maximum_number_media_packets = packet[pos++]; 377 break; 378 case AVDTP_CONTENT_PROTECTION: 379 caps->content_protection.cp_type = big_endian_read_16(packet, pos); 380 pos+=2; 381 382 caps->content_protection.cp_type_value_len = cap_len - 2; 383 pos += caps->content_protection.cp_type_value_len; 384 385 // connection->reject_service_category = category; 386 // connection->error_code = UNSUPPORTED_CONFIGURATION; 387 // support for content protection goes here 388 break; 389 390 case AVDTP_HEADER_COMPRESSION: 391 caps->header_compression.back_ch = packet[pos] >> 7; 392 caps->header_compression.media = packet[pos] >> 6; 393 caps->header_compression.recovery = packet[pos] >> 5; 394 pos++; 395 break; 396 case AVDTP_MULTIPLEXING: 397 caps->multiplexing_mode.fragmentation = packet[pos++] >> 7; 398 // read [tsid, tcid] for media, reporting. recovery respectively 399 caps->multiplexing_mode.transport_identifiers_num = 3; 400 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 401 caps->multiplexing_mode.transport_session_identifiers[i] = packet[pos++] >> 7; 402 caps->multiplexing_mode.tcid[i] = packet[pos++] >> 7; 403 } 404 break; 405 case AVDTP_MEDIA_CODEC: 406 caps->media_codec.media_type = (avdtp_media_type_t)(packet[pos++] >> 4); 407 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(packet[pos++]); 408 caps->media_codec.media_codec_information_len = cap_len - 2; 409 caps->media_codec.media_codec_information = &packet[pos]; 410 pos += caps->media_codec.media_codec_information_len; 411 break; 412 case AVDTP_MEDIA_TRANSPORT: 413 case AVDTP_REPORTING: 414 case AVDTP_DELAY_REPORTING: 415 pos += cap_len; 416 break; 417 default: 418 pos += cap_len; 419 rfa = 1; 420 break; 421 } 422 processed_cap_len = pos - processed_cap_len; 423 424 if (cap_len == processed_cap_len){ 425 if (!rfa) { 426 registered_service_categories = store_bit16(registered_service_categories, category, 1); 427 } 428 if (pos < size-2){ 429 //int old_pos = pos; 430 category = (avdtp_service_category_t)packet[pos++]; 431 cap_len = packet[pos++]; 432 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 433 } 434 } 435 } 436 return registered_service_categories; 437 } 438 439 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){ 440 if (signaling_packet->offset) return; 441 uint8_t pack_all_capabilities = 1; 442 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 443 int i; 444 445 signaling_packet->size = 0; 446 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 447 448 449 switch (identifier) { 450 case AVDTP_SI_GET_CAPABILITIES: 451 pack_all_capabilities = 0; 452 break; 453 case AVDTP_SI_GET_ALL_CAPABILITIES: 454 pack_all_capabilities = 1; 455 break; 456 case AVDTP_SI_SET_CONFIGURATION: 457 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 458 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 459 signaling_packet->message_type = AVDTP_CMD_MSG; 460 break; 461 case AVDTP_SI_RECONFIGURE: 462 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 463 signaling_packet->message_type = AVDTP_CMD_MSG; 464 break; 465 default: 466 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 467 break; 468 } 469 470 for (i = 1; i < 9; i++){ 471 int registered_category = get_bit16(registered_service_categories, i); 472 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION || identifier == AVDTP_SI_RECONFIGURE)){ 473 // TODO: introduce bitmap of mandatory categories 474 if (i == 1){ 475 registered_category = 1; 476 } 477 } 478 if (registered_category){ 479 // service category 480 signaling_packet->command[signaling_packet->size++] = i; 481 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); 482 } 483 } 484 485 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 486 signaling_packet->transaction_label = transaction_label; 487 } 488 489 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 490 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 491 int data_len = 0; 492 493 uint16_t offset = signaling_packet->offset; 494 uint16_t pos = 1; 495 496 if (offset == 0){ 497 if (signaling_packet->size <= mtu - 2){ 498 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 499 out_buffer[pos++] = signaling_packet->signal_identifier; 500 data_len = signaling_packet->size; 501 } else { 502 signaling_packet->packet_type = AVDTP_START_PACKET; 503 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 504 out_buffer[pos++] = signaling_packet->signal_identifier; 505 data_len = mtu - 3; 506 signaling_packet->offset = data_len; 507 } 508 } else { 509 int remaining_bytes = signaling_packet->size - offset; 510 if (remaining_bytes <= mtu - 1){ 511 signaling_packet->packet_type = AVDTP_END_PACKET; 512 data_len = remaining_bytes; 513 signaling_packet->offset = 0; 514 } else{ 515 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 516 data_len = mtu - 1; 517 signaling_packet->offset += data_len; 518 } 519 } 520 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 521 memcpy(out_buffer+pos, signaling_packet->command + offset, data_len); 522 pos += data_len; 523 return pos; 524 } 525 526 527 void avdtp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t avdtp_cid, bd_addr_t addr, uint8_t status){ 528 if (!callback) return; 529 uint8_t event[12]; 530 int pos = 0; 531 event[pos++] = HCI_EVENT_AVDTP_META; 532 event[pos++] = sizeof(event) - 2; 533 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 534 little_endian_store_16(event, pos, avdtp_cid); 535 pos += 2; 536 reverse_bd_addr(addr,&event[pos]); 537 pos += 6; 538 event[pos++] = status; 539 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 540 } 541 542 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){ 543 if (!callback) return; 544 uint8_t event[8]; 545 int pos = 0; 546 event[pos++] = HCI_EVENT_AVDTP_META; 547 event[pos++] = sizeof(event) - 2; 548 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 549 little_endian_store_16(event, pos, avdtp_cid); 550 pos += 2; 551 event[pos++] = seid; 552 little_endian_store_16(event, pos, sequence_number); 553 pos += 2; 554 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 555 } 556 557 void avdtp_signaling_emit_connection_released(btstack_packet_handler_t callback, uint16_t avdtp_cid){ 558 if (!callback) return; 559 uint8_t event[5]; 560 int pos = 0; 561 event[pos++] = HCI_EVENT_AVDTP_META; 562 event[pos++] = sizeof(event) - 2; 563 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 564 little_endian_store_16(event, pos, avdtp_cid); 565 pos += 2; 566 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 567 } 568 569 void avdtp_streaming_emit_connection_released(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid){ 570 if (!callback) return; 571 uint8_t event[6]; 572 int pos = 0; 573 event[pos++] = HCI_EVENT_AVDTP_META; 574 event[pos++] = sizeof(event) - 2; 575 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 576 little_endian_store_16(event, pos, avdtp_cid); 577 pos += 2; 578 event[pos++] = local_seid; 579 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 580 } 581 582 void avdtp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t avdtp_cid, bd_addr_t addr, uint8_t local_seid, uint8_t remote_seid, uint8_t status){ 583 if (!callback) return; 584 uint8_t event[14]; 585 int pos = 0; 586 event[pos++] = HCI_EVENT_AVDTP_META; 587 event[pos++] = sizeof(event) - 2; 588 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 589 little_endian_store_16(event, pos, avdtp_cid); 590 pos += 2; 591 reverse_bd_addr(addr,&event[pos]); 592 pos += 6; 593 event[pos++] = local_seid; 594 event[pos++] = remote_seid; 595 event[pos++] = status; 596 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 597 } 598 599 void avdtp_signaling_emit_sep(btstack_packet_handler_t callback, uint16_t avdtp_cid, avdtp_sep_t sep){ 600 if (!callback) return; 601 uint8_t event[9]; 602 int pos = 0; 603 event[pos++] = HCI_EVENT_AVDTP_META; 604 event[pos++] = sizeof(event) - 2; 605 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 606 little_endian_store_16(event, pos, avdtp_cid); 607 pos += 2; 608 event[pos++] = sep.seid; 609 event[pos++] = sep.in_use; 610 event[pos++] = sep.media_type; 611 event[pos++] = sep.type; 612 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 613 } 614 615 void avdtp_signaling_emit_accept(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier){ 616 if (!callback) return; 617 uint8_t event[7]; 618 int pos = 0; 619 event[pos++] = HCI_EVENT_AVDTP_META; 620 event[pos++] = sizeof(event) - 2; 621 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 622 little_endian_store_16(event, pos, avdtp_cid); 623 pos += 2; 624 event[pos++] = local_seid; 625 event[pos++] = identifier; 626 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 627 } 628 629 void avdtp_signaling_emit_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier){ 630 if (!callback) return; 631 uint8_t event[7]; 632 int pos = 0; 633 event[pos++] = HCI_EVENT_AVDTP_META; 634 event[pos++] = sizeof(event) - 2; 635 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 636 little_endian_store_16(event, pos, avdtp_cid); 637 pos += 2; 638 event[pos++] = local_seid; 639 event[pos++] = identifier; 640 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 641 } 642 643 void avdtp_signaling_emit_general_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier){ 644 if (!callback) return; 645 uint8_t event[7]; 646 int pos = 0; 647 event[pos++] = HCI_EVENT_AVDTP_META; 648 event[pos++] = sizeof(event) - 2; 649 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 650 little_endian_store_16(event, pos, avdtp_cid); 651 pos += 2; 652 event[pos++] = local_seid; 653 event[pos++] = identifier; 654 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 655 } 656 657 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){ 658 if (!callback) return; 659 uint8_t event[15]; 660 int pos = 0; 661 event[pos++] = HCI_EVENT_AVDTP_META; 662 event[pos++] = sizeof(event) - 2; 663 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 664 little_endian_store_16(event, pos, avdtp_cid); 665 pos += 2; 666 event[pos++] = local_seid; 667 event[pos++] = remote_seid; 668 event[pos++] = media_codec.media_type; 669 event[pos++] = media_codec.media_codec_information[0] >> 4; 670 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 671 event[pos++] = media_codec.media_codec_information[1] >> 4; 672 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 673 event[pos++] = media_codec.media_codec_information[1] & 0x03; 674 event[pos++] = media_codec.media_codec_information[2]; 675 event[pos++] = media_codec.media_codec_information[3]; 676 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 677 } 678 679 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){ 680 if (!callback) return; 681 uint8_t event[111]; 682 int pos = 0; 683 event[pos++] = HCI_EVENT_AVDTP_META; 684 event[pos++] = sizeof(event) - 2; 685 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 686 little_endian_store_16(event, pos, avdtp_cid); 687 pos += 2; 688 event[pos++] = local_seid; 689 event[pos++] = remote_seid; 690 event[pos++] = media_codec.media_type; 691 little_endian_store_16(event, pos, media_codec.media_codec_type); 692 pos += 2; 693 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 694 pos += 2; 695 if (media_codec.media_codec_information_len < 100){ 696 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 697 } else { 698 memcpy(event+pos, media_codec.media_codec_information, 100); 699 } 700 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 701 } 702 703 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, 704 avdtp_media_type_t media_type, const uint8_t * media_codec_information, uint8_t reconfigure){ 705 if (!callback) return; 706 uint8_t event[16+2]; 707 int pos = 0; 708 event[pos++] = HCI_EVENT_AVDTP_META; 709 event[pos++] = sizeof(event) - 2; 710 711 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 712 little_endian_store_16(event, pos, avdtp_cid); 713 pos += 2; 714 event[pos++] = local_seid; 715 event[pos++] = remote_seid; 716 event[pos++] = reconfigure; 717 718 uint8_t num_channels = 0; 719 uint16_t sampling_frequency = 0; 720 uint8_t subbands = 0; 721 uint8_t block_length = 0; 722 723 uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; 724 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; 725 uint8_t block_length_bitmap = media_codec_information[1] >> 4; 726 uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; 727 728 if (channel_mode_bitmap & AVDTP_SBC_MONO){ 729 num_channels = 1; 730 } 731 if ( (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 732 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 733 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL) ){ 734 num_channels = 2; 735 } 736 737 if (sampling_frequency_bitmap & AVDTP_SBC_16000){ 738 sampling_frequency = 16000; 739 } 740 if (sampling_frequency_bitmap & AVDTP_SBC_32000){ 741 sampling_frequency = 32000; 742 } 743 if (sampling_frequency_bitmap & AVDTP_SBC_44100){ 744 sampling_frequency = 44100; 745 } 746 if (sampling_frequency_bitmap & AVDTP_SBC_48000){ 747 sampling_frequency = 48000; 748 } 749 750 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 751 subbands = 4; 752 } 753 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 754 subbands = 8; 755 } 756 757 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 758 block_length = 4; 759 } 760 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 761 block_length = 8; 762 } 763 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 764 block_length = 12; 765 } 766 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 767 block_length = 16; 768 } 769 770 event[pos++] = media_type; 771 little_endian_store_16(event, pos, sampling_frequency); 772 pos += 2; 773 774 event[pos++] = channel_mode_bitmap; 775 event[pos++] = num_channels; 776 event[pos++] = block_length; 777 event[pos++] = subbands; 778 event[pos++] = media_codec_information[1] & 0x03; 779 event[pos++] = media_codec_information[2]; 780 event[pos++] = media_codec_information[3]; 781 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 782 } 783 784 void avdtp_signaling_emit_media_codec_sbc_configuration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_media_type_t media_type, const uint8_t * media_codec_information){ 785 if (!callback) return; 786 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, local_seid, remote_seid, media_type, media_codec_information, 0); 787 } 788 789 void avdtp_signaling_emit_media_codec_sbc_reconfiguration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_media_type_t media_type, const uint8_t * media_codec_information){ 790 if (!callback) return; 791 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, local_seid, remote_seid, media_type, media_codec_information, 1); 792 } 793 794 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){ 795 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 13]; 796 int pos = 0; 797 event[pos++] = HCI_EVENT_AVDTP_META; 798 event[pos++] = sizeof(event) - 2; 799 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 800 little_endian_store_16(event, pos, avdtp_cid); 801 pos += 2; 802 event[pos++] = local_seid; 803 event[pos++] = remote_seid; 804 event[pos++] = reconfigure; 805 event[pos++] = media_codec.media_type; 806 little_endian_store_16(event, pos, media_codec.media_codec_type); 807 pos += 2; 808 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 809 pos += 2; 810 811 int media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec.media_codec_information_len); 812 memcpy(event+pos, media_codec.media_codec_information, media_codec_len); 813 814 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 815 } 816 817 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){ 818 if (!callback) return; 819 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, local_seid, remote_seid, media_codec, 0); 820 } 821 822 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){ 823 if (!callback) return; 824 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, local_seid, remote_seid, media_codec, 1); 825 } 826 827 828 void avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 829 if (!connection) return; 830 connection->wait_to_send_acceptor = 1; 831 l2cap_request_can_send_now_event(l2cap_cid); 832 } 833 void avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 834 if (!connection) return; 835 connection->wait_to_send_initiator = 1; 836 l2cap_request_can_send_now_event(l2cap_cid); 837 } 838 void avdtp_request_can_send_now_self(avdtp_connection_t * connection, uint16_t l2cap_cid){ 839 if (!connection) return; 840 connection->wait_to_send_self = 1; 841 l2cap_request_can_send_now_event(l2cap_cid); 842 } 843 844 uint8_t avdtp_get_index_of_remote_stream_endpoint_with_seid(avdtp_stream_endpoint_t * stream_endpoint, uint16_t seid){ 845 if (!stream_endpoint->connection) return AVDTP_INVALID_SEP_INDEX; 846 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == seid){ 847 return stream_endpoint->remote_sep_index; 848 } 849 int i; 850 for (i=0; i < stream_endpoint->connection->remote_seps_num; i++){ 851 if (stream_endpoint->connection->remote_seps[i].seid == seid){ 852 return i; 853 } 854 } 855 return AVDTP_INVALID_SEP_INDEX; 856 } 857 858 uint8_t avdtp_find_remote_sep(avdtp_connection_t * connection, uint8_t remote_seid){ 859 if (!connection) return AVDTP_INVALID_SEP_INDEX; 860 int i; 861 for (i = 0; i < connection->remote_seps_num; i++){ 862 if (connection->remote_seps[i].seid == remote_seid){ 863 return i; 864 } 865 } 866 return AVDTP_INVALID_SEP_INDEX; 867 } 868 869 870 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 871 if (!stream_endpoint) return 0; 872 return stream_endpoint->sep.seid; 873 874 } 875 876 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 877 if (!stream_endpoint) return 0; 878 if (!stream_endpoint->connection) return 0; 879 return stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid; 880 } 881 882 void a2dp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t cid, bd_addr_t addr, uint8_t local_seid, uint8_t remote_seid, uint8_t status){ 883 if (!callback) return; 884 uint8_t event[14]; 885 int pos = 0; 886 event[pos++] = HCI_EVENT_A2DP_META; 887 event[pos++] = sizeof(event) - 2; 888 event[pos++] = A2DP_SUBEVENT_STREAM_ESTABLISHED; 889 little_endian_store_16(event, pos, cid); 890 pos += 2; 891 reverse_bd_addr(addr,&event[pos]); 892 pos += 6; 893 event[pos++] = local_seid; 894 event[pos++] = remote_seid; 895 event[pos++] = status; 896 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 897 } 898