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