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 void avdtp_initialize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 51 stream_endpoint->connection = NULL; 52 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 53 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 54 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 55 stream_endpoint->remote_sep_index = AVDTP_INVALID_SEP_INDEX; 56 stream_endpoint->media_disconnect = 0; 57 stream_endpoint->sep.in_use = 0; 58 stream_endpoint->remote_sep_index = 0; 59 } 60 61 avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_seid(uint16_t seid, avdtp_context_t * context){ 62 btstack_linked_list_iterator_t it; 63 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 64 while (btstack_linked_list_iterator_has_next(&it)){ 65 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 66 if (stream_endpoint->sep.seid == seid){ 67 return stream_endpoint; 68 } 69 } 70 return NULL; 71 } 72 73 avdtp_connection_t * avdtp_connection_for_bd_addr(bd_addr_t addr, avdtp_context_t * context){ 74 btstack_linked_list_iterator_t it; 75 btstack_linked_list_iterator_init(&it, &context->connections); 76 while (btstack_linked_list_iterator_has_next(&it)){ 77 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 78 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 79 return connection; 80 } 81 return NULL; 82 } 83 84 avdtp_connection_t * avdtp_connection_for_avdtp_cid(uint16_t avdtp_cid, avdtp_context_t * context){ 85 btstack_linked_list_iterator_t it; 86 btstack_linked_list_iterator_init(&it, &context->connections); 87 while (btstack_linked_list_iterator_has_next(&it)){ 88 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 89 if (connection->avdtp_cid != avdtp_cid) continue; 90 return connection; 91 } 92 return NULL; 93 } 94 95 avdtp_connection_t * avdtp_connection_for_tl2cap_signaling_cid(uint16_t l2cap_cid, avdtp_context_t * context){ 96 btstack_linked_list_iterator_t it; 97 btstack_linked_list_iterator_init(&it, &context->connections); 98 while (btstack_linked_list_iterator_has_next(&it)){ 99 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 100 if (connection->tl2cap_signaling_cid != l2cap_cid) continue; 101 return connection; 102 } 103 return NULL; 104 } 105 106 avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_l2cap_cid(uint16_t l2cap_cid, avdtp_context_t * context){ 107 btstack_linked_list_iterator_t it; 108 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 109 while (btstack_linked_list_iterator_has_next(&it)){ 110 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 111 if (stream_endpoint->l2cap_media_cid == l2cap_cid){ 112 return stream_endpoint; 113 } 114 if (stream_endpoint->l2cap_reporting_cid == l2cap_cid){ 115 return stream_endpoint; 116 } 117 if (stream_endpoint->l2cap_recovery_cid == l2cap_cid){ 118 return stream_endpoint; 119 } 120 } 121 return NULL; 122 } 123 124 avdtp_stream_endpoint_t * avdtp_stream_endpoint_with_seid(uint8_t seid, avdtp_context_t * context){ 125 btstack_linked_list_iterator_t it; 126 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 127 while (btstack_linked_list_iterator_has_next(&it)){ 128 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 129 if (stream_endpoint->sep.seid == seid){ 130 return stream_endpoint; 131 } 132 } 133 return NULL; 134 } 135 136 avdtp_stream_endpoint_t * avdtp_stream_endpoint_associated_with_acp_seid(uint16_t acp_seid, avdtp_context_t * context){ 137 btstack_linked_list_iterator_t it; 138 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 139 while (btstack_linked_list_iterator_has_next(&it)){ 140 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 141 142 if (stream_endpoint->remote_sep_index != AVDTP_INVALID_SEP_INDEX){ 143 if (!stream_endpoint->connection) continue; 144 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == acp_seid){ 145 return stream_endpoint; 146 } 147 } 148 } 149 return NULL; 150 } 151 152 int get_bit16(uint16_t bitmap, int position){ 153 return (bitmap >> position) & 1; 154 } 155 156 uint8_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 157 if (value){ 158 bitmap |= 1 << position; 159 } else { 160 bitmap &= ~ (1 << position); 161 } 162 return bitmap; 163 } 164 165 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 166 int pos = 0; 167 if (size < 2) return pos; 168 signaling_header->transaction_label = packet[pos] >> 4; 169 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 170 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 171 pos++; 172 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 173 switch (signaling_header->packet_type){ 174 case AVDTP_SINGLE_PACKET: 175 signaling_header->num_packets = 0; 176 signaling_header->offset = 0; 177 signaling_header->size = 0; 178 break; 179 case AVDTP_END_PACKET: 180 signaling_header->num_packets = 0; 181 break; 182 case AVDTP_START_PACKET: 183 signaling_header->num_packets = packet[pos++]; 184 signaling_header->size = 0; 185 signaling_header->offset = 0; 186 break; 187 case AVDTP_CONTINUE_PACKET: 188 if (signaling_header->num_packets <= 0) { 189 log_info(" ERROR: wrong num fragmented packets\n"); 190 break; 191 } 192 signaling_header->num_packets--; 193 break; 194 } 195 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 196 return pos; 197 } 198 199 int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){ 200 UNUSED(size); 201 202 int i; 203 // pos = 0 reserved for length 204 int pos = 1; 205 switch(category){ 206 case AVDTP_MEDIA_TRANSPORT: 207 case AVDTP_REPORTING: 208 break; 209 case AVDTP_DELAY_REPORTING: 210 if (!pack_all_capabilities) break; 211 break; 212 case AVDTP_RECOVERY: 213 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 214 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 215 buffer[pos++] = caps.recovery.maximum_number_media_packets; 216 break; 217 case AVDTP_CONTENT_PROTECTION: 218 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 219 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 220 pos += 2; 221 memcpy(buffer+pos, caps.content_protection.cp_type_value, caps.content_protection.cp_type_value_len); 222 break; 223 case AVDTP_HEADER_COMPRESSION: 224 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 225 break; 226 case AVDTP_MULTIPLEXING: 227 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 228 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 229 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 230 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 231 // media, reporting. recovery 232 } 233 break; 234 case AVDTP_MEDIA_CODEC: 235 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 236 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 237 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 238 buffer[pos++] = caps.media_codec.media_codec_information[i]; 239 } 240 break; 241 default: 242 break; 243 } 244 buffer[0] = pos - 1; // length 245 return pos; 246 } 247 248 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_service_category_t category, uint8_t cap_len){ 249 connection->error_code = 0; 250 251 if (category == AVDTP_SERVICE_CATEGORY_INVALID_0 || 252 (category == AVDTP_SERVICE_CATEGORY_INVALID_FF && connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE)){ 253 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 254 connection->reject_service_category = category; 255 connection->error_code = BAD_SERV_CATEGORY; 256 return 1; 257 } 258 259 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 260 if (category != AVDTP_CONTENT_PROTECTION && category != AVDTP_MEDIA_CODEC){ 261 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 262 connection->reject_service_category = category; 263 connection->error_code = INVALID_CAPABILITIES; 264 return 1; 265 } 266 } 267 268 switch(category){ 269 case AVDTP_MEDIA_TRANSPORT: 270 if (cap_len != 0){ 271 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 272 connection->reject_service_category = category; 273 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 274 return 1; 275 } 276 break; 277 case AVDTP_REPORTING: 278 case AVDTP_DELAY_REPORTING: 279 if (cap_len != 0){ 280 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 281 connection->reject_service_category = category; 282 connection->error_code = BAD_LENGTH; 283 return 1; 284 } 285 break; 286 case AVDTP_RECOVERY: 287 if (cap_len < 3){ 288 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 289 connection->reject_service_category = category; 290 connection->error_code = BAD_RECOVERY_FORMAT; 291 return 1; 292 } 293 break; 294 case AVDTP_CONTENT_PROTECTION: 295 if (cap_len < 2){ 296 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 297 connection->reject_service_category = category; 298 connection->error_code = BAD_CP_FORMAT; 299 return 1; 300 } 301 break; 302 case AVDTP_HEADER_COMPRESSION: 303 break; 304 case AVDTP_MULTIPLEXING: 305 break; 306 case AVDTP_MEDIA_CODEC: 307 break; 308 default: 309 break; 310 } 311 return 0; 312 } 313 314 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 315 if (size == 0) return 0; 316 317 uint16_t registered_service_categories = 0; 318 int pos = 0; 319 int i; 320 avdtp_service_category_t category = (avdtp_service_category_t)packet[pos++]; 321 uint8_t cap_len = packet[pos++]; 322 323 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 324 int processed_cap_len = 0; 325 int rfa = 0; 326 327 while (pos < size){ 328 if (cap_len > size - pos){ 329 connection->reject_service_category = category; 330 connection->error_code = BAD_LENGTH; 331 return 0; 332 } 333 rfa = 0; 334 processed_cap_len = pos; 335 switch(category){ 336 case AVDTP_RECOVERY: 337 caps->recovery.recovery_type = packet[pos++]; 338 caps->recovery.maximum_recovery_window_size = packet[pos++]; 339 caps->recovery.maximum_number_media_packets = packet[pos++]; 340 break; 341 case AVDTP_CONTENT_PROTECTION: 342 caps->content_protection.cp_type = big_endian_read_16(packet, pos); 343 pos+=2; 344 345 caps->content_protection.cp_type_value_len = cap_len - 2; 346 pos += caps->content_protection.cp_type_value_len; 347 348 // connection->reject_service_category = category; 349 // connection->error_code = UNSUPPORTED_CONFIGURATION; 350 // support for content protection goes here 351 break; 352 353 case AVDTP_HEADER_COMPRESSION: 354 caps->header_compression.back_ch = packet[pos] >> 7; 355 caps->header_compression.media = packet[pos] >> 6; 356 caps->header_compression.recovery = packet[pos] >> 5; 357 pos++; 358 break; 359 case AVDTP_MULTIPLEXING: 360 caps->multiplexing_mode.fragmentation = packet[pos++] >> 7; 361 // read [tsid, tcid] for media, reporting. recovery respectively 362 caps->multiplexing_mode.transport_identifiers_num = 3; 363 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 364 caps->multiplexing_mode.transport_session_identifiers[i] = packet[pos++] >> 7; 365 caps->multiplexing_mode.tcid[i] = packet[pos++] >> 7; 366 } 367 break; 368 case AVDTP_MEDIA_CODEC: 369 caps->media_codec.media_type = (avdtp_media_type_t)(packet[pos++] >> 4); 370 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(packet[pos++]); 371 caps->media_codec.media_codec_information_len = cap_len - 2; 372 caps->media_codec.media_codec_information = &packet[pos]; 373 pos += caps->media_codec.media_codec_information_len; 374 break; 375 case AVDTP_MEDIA_TRANSPORT: 376 case AVDTP_REPORTING: 377 case AVDTP_DELAY_REPORTING: 378 pos += cap_len; 379 break; 380 default: 381 pos += cap_len; 382 rfa = 1; 383 break; 384 } 385 processed_cap_len = pos - processed_cap_len; 386 387 if (cap_len == processed_cap_len){ 388 if (!rfa) { 389 registered_service_categories = store_bit16(registered_service_categories, category, 1); 390 } 391 if (pos < size-2){ 392 //int old_pos = pos; 393 category = (avdtp_service_category_t)packet[pos++]; 394 cap_len = packet[pos++]; 395 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 396 } 397 } 398 } 399 return registered_service_categories; 400 } 401 402 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){ 403 if (signaling_packet->offset) return; 404 uint8_t pack_all_capabilities = 1; 405 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 406 int i; 407 408 signaling_packet->size = 0; 409 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 410 411 412 switch (identifier) { 413 case AVDTP_SI_GET_CAPABILITIES: 414 pack_all_capabilities = 0; 415 break; 416 case AVDTP_SI_GET_ALL_CAPABILITIES: 417 pack_all_capabilities = 1; 418 break; 419 case AVDTP_SI_SET_CONFIGURATION: 420 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 421 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 422 signaling_packet->message_type = AVDTP_CMD_MSG; 423 break; 424 case AVDTP_SI_RECONFIGURE: 425 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 426 signaling_packet->message_type = AVDTP_CMD_MSG; 427 break; 428 default: 429 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 430 break; 431 } 432 433 for (i = 1; i < 9; i++){ 434 int registered_category = get_bit16(registered_service_categories, i); 435 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION || identifier == AVDTP_SI_RECONFIGURE)){ 436 // TODO: introduce bitmap of mandatory categories 437 if (i == 1){ 438 registered_category = 1; 439 } 440 } 441 if (registered_category){ 442 // service category 443 signaling_packet->command[signaling_packet->size++] = i; 444 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); 445 } 446 } 447 448 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 449 signaling_packet->transaction_label = transaction_label; 450 } 451 452 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 453 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 454 int data_len = 0; 455 456 uint16_t offset = signaling_packet->offset; 457 uint16_t pos = 1; 458 459 if (offset == 0){ 460 if (signaling_packet->size <= mtu - 2){ 461 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 462 out_buffer[pos++] = signaling_packet->signal_identifier; 463 data_len = signaling_packet->size; 464 } else { 465 signaling_packet->packet_type = AVDTP_START_PACKET; 466 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 467 out_buffer[pos++] = signaling_packet->signal_identifier; 468 data_len = mtu - 3; 469 signaling_packet->offset = data_len; 470 } 471 } else { 472 int remaining_bytes = signaling_packet->size - offset; 473 if (remaining_bytes <= mtu - 1){ 474 signaling_packet->packet_type = AVDTP_END_PACKET; 475 data_len = remaining_bytes; 476 signaling_packet->offset = 0; 477 } else{ 478 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 479 data_len = mtu - 1; 480 signaling_packet->offset += data_len; 481 } 482 } 483 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 484 memcpy(out_buffer+pos, signaling_packet->command + offset, data_len); 485 pos += data_len; 486 return pos; 487 } 488 489 490 void avdtp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t avdtp_cid, bd_addr_t addr, uint8_t status){ 491 if (!callback) return; 492 uint8_t event[12]; 493 int pos = 0; 494 event[pos++] = HCI_EVENT_AVDTP_META; 495 event[pos++] = sizeof(event) - 2; 496 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 497 little_endian_store_16(event, pos, avdtp_cid); 498 pos += 2; 499 reverse_bd_addr(addr,&event[pos]); 500 pos += 6; 501 event[pos++] = status; 502 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 503 } 504 505 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){ 506 if (!callback) return; 507 uint8_t event[8]; 508 int pos = 0; 509 event[pos++] = HCI_EVENT_AVDTP_META; 510 event[pos++] = sizeof(event) - 2; 511 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 512 little_endian_store_16(event, pos, avdtp_cid); 513 pos += 2; 514 event[pos++] = seid; 515 little_endian_store_16(event, pos, sequence_number); 516 pos += 2; 517 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 518 } 519 520 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){ 521 if (!callback) return; 522 uint8_t event[8]; 523 int pos = 0; 524 event[pos++] = HCI_EVENT_AVDTP_META; 525 event[pos++] = sizeof(event) - 2; 526 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 527 little_endian_store_16(event, pos, avdtp_cid); 528 pos += 2; 529 event[pos++] = local_seid; 530 event[pos++] = remote_seid; 531 event[pos++] = status; 532 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 533 } 534 535 void avdtp_signaling_emit_sep(btstack_packet_handler_t callback, uint16_t avdtp_cid, avdtp_sep_t sep){ 536 if (!callback) return; 537 uint8_t event[9]; 538 int pos = 0; 539 event[pos++] = HCI_EVENT_AVDTP_META; 540 event[pos++] = sizeof(event) - 2; 541 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 542 little_endian_store_16(event, pos, avdtp_cid); 543 pos += 2; 544 event[pos++] = sep.seid; 545 event[pos++] = sep.in_use; 546 event[pos++] = sep.media_type; 547 event[pos++] = sep.type; 548 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 549 } 550 551 void avdtp_signaling_emit_accept(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier){ 552 if (!callback) return; 553 uint8_t event[7]; 554 int pos = 0; 555 event[pos++] = HCI_EVENT_AVDTP_META; 556 event[pos++] = sizeof(event) - 2; 557 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 558 little_endian_store_16(event, pos, avdtp_cid); 559 pos += 2; 560 event[pos++] = local_seid; 561 event[pos++] = identifier; 562 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 563 } 564 565 void avdtp_signaling_emit_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier){ 566 if (!callback) return; 567 uint8_t event[7]; 568 int pos = 0; 569 event[pos++] = HCI_EVENT_AVDTP_META; 570 event[pos++] = sizeof(event) - 2; 571 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 572 little_endian_store_16(event, pos, avdtp_cid); 573 pos += 2; 574 event[pos++] = local_seid; 575 event[pos++] = identifier; 576 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 577 } 578 579 void avdtp_signaling_emit_general_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier){ 580 if (!callback) return; 581 uint8_t event[7]; 582 int pos = 0; 583 event[pos++] = HCI_EVENT_AVDTP_META; 584 event[pos++] = sizeof(event) - 2; 585 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 586 little_endian_store_16(event, pos, avdtp_cid); 587 pos += 2; 588 event[pos++] = local_seid; 589 event[pos++] = identifier; 590 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 591 } 592 593 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){ 594 if (!callback) return; 595 uint8_t event[15]; 596 int pos = 0; 597 event[pos++] = HCI_EVENT_AVDTP_META; 598 event[pos++] = sizeof(event) - 2; 599 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 600 little_endian_store_16(event, pos, avdtp_cid); 601 pos += 2; 602 event[pos++] = local_seid; 603 event[pos++] = remote_seid; 604 event[pos++] = media_codec.media_type; 605 event[pos++] = media_codec.media_codec_information[0] >> 4; 606 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 607 event[pos++] = media_codec.media_codec_information[1] >> 4; 608 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 609 event[pos++] = media_codec.media_codec_information[1] & 0x03; 610 event[pos++] = media_codec.media_codec_information[2]; 611 event[pos++] = media_codec.media_codec_information[3]; 612 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 613 } 614 615 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){ 616 if (!callback) return; 617 uint8_t event[111]; 618 int pos = 0; 619 event[pos++] = HCI_EVENT_AVDTP_META; 620 event[pos++] = sizeof(event) - 2; 621 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 622 little_endian_store_16(event, pos, avdtp_cid); 623 pos += 2; 624 event[pos++] = local_seid; 625 event[pos++] = remote_seid; 626 event[pos++] = media_codec.media_type; 627 little_endian_store_16(event, pos, media_codec.media_codec_type); 628 pos += 2; 629 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 630 pos += 2; 631 if (media_codec.media_codec_information_len < 100){ 632 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 633 } else { 634 memcpy(event+pos, media_codec.media_codec_information, 100); 635 } 636 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 637 } 638 639 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){ 640 if (!callback) return; 641 uint8_t event[16+2]; 642 int pos = 0; 643 event[pos++] = HCI_EVENT_AVDTP_META; 644 event[pos++] = sizeof(event) - 2; 645 646 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 647 little_endian_store_16(event, pos, avdtp_cid); 648 pos += 2; 649 event[pos++] = local_seid; 650 event[pos++] = remote_seid; 651 event[pos++] = reconfigure; 652 653 uint8_t num_channels = 0; 654 uint16_t sampling_frequency = 0; 655 uint8_t subbands = 0; 656 uint8_t block_length = 0; 657 658 uint8_t sampling_frequency_bitmap = media_codec.media_codec_information[0] >> 4; 659 uint8_t channel_mode_bitmap = media_codec.media_codec_information[0] & 0x0F; 660 uint8_t block_length_bitmap = media_codec.media_codec_information[1] >> 4; 661 uint8_t subbands_bitmap = (media_codec.media_codec_information[1] & 0x0F) >> 2; 662 663 if (channel_mode_bitmap & AVDTP_SBC_MONO){ 664 num_channels = 1; 665 } 666 if ( (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 667 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 668 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL) ){ 669 num_channels = 2; 670 } 671 672 if (sampling_frequency_bitmap & AVDTP_SBC_16000){ 673 sampling_frequency = 16000; 674 } 675 if (sampling_frequency_bitmap & AVDTP_SBC_32000){ 676 sampling_frequency = 32000; 677 } 678 if (sampling_frequency_bitmap & AVDTP_SBC_44100){ 679 sampling_frequency = 44100; 680 } 681 if (sampling_frequency_bitmap & AVDTP_SBC_48000){ 682 sampling_frequency = 48000; 683 } 684 685 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 686 subbands = 4; 687 } 688 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 689 subbands = 8; 690 } 691 692 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 693 block_length = 4; 694 } 695 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 696 block_length = 8; 697 } 698 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 699 block_length = 12; 700 } 701 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 702 block_length = 16; 703 } 704 705 event[pos++] = media_codec.media_type; 706 little_endian_store_16(event, pos, sampling_frequency); 707 pos += 2; 708 709 event[pos++] = channel_mode_bitmap; 710 event[pos++] = num_channels; 711 event[pos++] = block_length; 712 event[pos++] = subbands; 713 event[pos++] = media_codec.media_codec_information[1] & 0x03; 714 event[pos++] = media_codec.media_codec_information[2]; 715 event[pos++] = media_codec.media_codec_information[3]; 716 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 717 } 718 719 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){ 720 if (!callback) return; 721 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, local_seid, remote_seid, media_codec, 0); 722 } 723 724 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){ 725 if (!callback) return; 726 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, local_seid, remote_seid, media_codec, 1); 727 } 728 729 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){ 730 uint8_t event[112]; 731 int pos = 0; 732 event[pos++] = HCI_EVENT_AVDTP_META; 733 event[pos++] = sizeof(event) - 2; 734 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 735 little_endian_store_16(event, pos, avdtp_cid); 736 pos += 2; 737 event[pos++] = local_seid; 738 event[pos++] = remote_seid; 739 event[pos++] = reconfigure; 740 741 event[pos++] = media_codec.media_type; 742 little_endian_store_16(event, pos, media_codec.media_codec_type); 743 pos += 2; 744 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 745 pos += 2; 746 747 if (media_codec.media_codec_information_len < 100){ 748 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 749 } else { 750 memcpy(event+pos, media_codec.media_codec_information, 100); 751 } 752 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 753 } 754 755 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){ 756 if (!callback) return; 757 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, local_seid, remote_seid, media_codec, 0); 758 } 759 760 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){ 761 if (!callback) return; 762 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, local_seid, remote_seid, media_codec, 1); 763 } 764 765 766 void avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 767 connection->wait_to_send_acceptor = 1; 768 l2cap_request_can_send_now_event(l2cap_cid); 769 } 770 void avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 771 connection->wait_to_send_initiator = 1; 772 l2cap_request_can_send_now_event(l2cap_cid); 773 } 774 void avdtp_request_can_send_now_self(avdtp_connection_t * connection, uint16_t l2cap_cid){ 775 connection->wait_to_send_self = 1; 776 l2cap_request_can_send_now_event(l2cap_cid); 777 } 778 779 uint8_t avdtp_get_index_of_remote_stream_endpoint_with_seid(avdtp_stream_endpoint_t * stream_endpoint, uint16_t seid){ 780 if (!stream_endpoint->connection) return AVDTP_INVALID_SEP_INDEX; 781 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == seid){ 782 return stream_endpoint->remote_sep_index; 783 } 784 int i; 785 for (i=0; i < stream_endpoint->connection->remote_seps_num; i++){ 786 if (stream_endpoint->connection->remote_seps[i].seid == seid){ 787 return i; 788 } 789 } 790 return AVDTP_INVALID_SEP_INDEX; 791 } 792 793 uint8_t avdtp_find_remote_sep(avdtp_connection_t * connection, uint8_t remote_seid){ 794 if (!connection) return AVDTP_INVALID_SEP_INDEX; 795 int i; 796 for (i = 0; i < connection->remote_seps_num; i++){ 797 if (connection->remote_seps[i].seid == remote_seid){ 798 return i; 799 } 800 } 801 return AVDTP_INVALID_SEP_INDEX; 802 } 803 804 805 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 806 if (!stream_endpoint) return 0; 807 return stream_endpoint->sep.seid; 808 809 } 810 811 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 812 if (!stream_endpoint) return 0; 813 if (!stream_endpoint->connection) return 0; 814 return stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid; 815 } 816