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