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_l2cap_signaling_cid(uint16_t l2cap_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->l2cap_signaling_cid != l2cap_cid) continue; 90 return connection; 91 } 92 return NULL; 93 } 94 95 avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_l2cap_cid(uint16_t l2cap_cid, avdtp_context_t * context){ 96 btstack_linked_list_iterator_t it; 97 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 98 while (btstack_linked_list_iterator_has_next(&it)){ 99 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 100 if (stream_endpoint->l2cap_media_cid == l2cap_cid){ 101 return stream_endpoint; 102 } 103 if (stream_endpoint->l2cap_reporting_cid == l2cap_cid){ 104 return stream_endpoint; 105 } 106 if (stream_endpoint->l2cap_recovery_cid == l2cap_cid){ 107 return stream_endpoint; 108 } 109 } 110 return NULL; 111 } 112 113 avdtp_stream_endpoint_t * avdtp_stream_endpoint_with_seid(uint8_t seid, avdtp_context_t * context){ 114 btstack_linked_list_iterator_t it; 115 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 116 while (btstack_linked_list_iterator_has_next(&it)){ 117 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 118 if (stream_endpoint->sep.seid == seid){ 119 return stream_endpoint; 120 } 121 } 122 return NULL; 123 } 124 125 avdtp_stream_endpoint_t * avdtp_stream_endpoint_associated_with_acp_seid(uint16_t acp_seid, avdtp_context_t * context){ 126 btstack_linked_list_iterator_t it; 127 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 128 while (btstack_linked_list_iterator_has_next(&it)){ 129 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 130 131 if (stream_endpoint->remote_sep_index != AVDTP_INVALID_SEP_INDEX){ 132 if (!stream_endpoint->connection) continue; 133 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == acp_seid){ 134 return stream_endpoint; 135 } 136 } 137 } 138 return NULL; 139 } 140 141 int get_bit16(uint16_t bitmap, int position){ 142 return (bitmap >> position) & 1; 143 } 144 145 uint8_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 146 if (value){ 147 bitmap |= 1 << position; 148 } else { 149 bitmap &= ~ (1 << position); 150 } 151 return bitmap; 152 } 153 154 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 155 int pos = 0; 156 if (size < 2) return pos; 157 signaling_header->transaction_label = packet[pos] >> 4; 158 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 159 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 160 pos++; 161 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 162 switch (signaling_header->packet_type){ 163 case AVDTP_SINGLE_PACKET: 164 signaling_header->num_packets = 0; 165 signaling_header->offset = 0; 166 signaling_header->size = 0; 167 break; 168 case AVDTP_END_PACKET: 169 signaling_header->num_packets = 0; 170 break; 171 case AVDTP_START_PACKET: 172 signaling_header->num_packets = packet[pos++]; 173 signaling_header->size = 0; 174 signaling_header->offset = 0; 175 break; 176 case AVDTP_CONTINUE_PACKET: 177 if (signaling_header->num_packets <= 0) { 178 log_info(" ERROR: wrong num fragmented packets\n"); 179 break; 180 } 181 signaling_header->num_packets--; 182 break; 183 } 184 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 185 return pos; 186 } 187 188 int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){ 189 UNUSED(size); 190 191 int i; 192 // pos = 0 reserved for length 193 int pos = 1; 194 switch(category){ 195 case AVDTP_MEDIA_TRANSPORT: 196 case AVDTP_REPORTING: 197 break; 198 case AVDTP_DELAY_REPORTING: 199 if (!pack_all_capabilities) break; 200 break; 201 case AVDTP_RECOVERY: 202 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 203 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 204 buffer[pos++] = caps.recovery.maximum_number_media_packets; 205 break; 206 case AVDTP_CONTENT_PROTECTION: 207 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 208 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 209 pos += 2; 210 memcpy(buffer+pos, caps.content_protection.cp_type_value, caps.content_protection.cp_type_value_len); 211 break; 212 case AVDTP_HEADER_COMPRESSION: 213 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 214 break; 215 case AVDTP_MULTIPLEXING: 216 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 217 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 218 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 219 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 220 // media, reporting. recovery 221 } 222 break; 223 case AVDTP_MEDIA_CODEC: 224 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 225 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 226 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 227 buffer[pos++] = caps.media_codec.media_codec_information[i]; 228 } 229 break; 230 default: 231 break; 232 } 233 buffer[0] = pos - 1; // length 234 return pos; 235 } 236 237 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_service_category_t category, uint8_t cap_len){ 238 connection->error_code = 0; 239 240 if (category == AVDTP_SERVICE_CATEGORY_INVALID_0 || 241 (category == AVDTP_SERVICE_CATEGORY_INVALID_FF && connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE)){ 242 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 243 connection->reject_service_category = category; 244 connection->error_code = BAD_SERV_CATEGORY; 245 return 1; 246 } 247 248 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 249 if (category != AVDTP_CONTENT_PROTECTION && category != AVDTP_MEDIA_CODEC){ 250 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 251 connection->reject_service_category = category; 252 connection->error_code = INVALID_CAPABILITIES; 253 return 1; 254 } 255 } 256 257 switch(category){ 258 case AVDTP_MEDIA_TRANSPORT: 259 if (cap_len != 0){ 260 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 261 connection->reject_service_category = category; 262 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 263 return 1; 264 } 265 break; 266 case AVDTP_REPORTING: 267 case AVDTP_DELAY_REPORTING: 268 if (cap_len != 0){ 269 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 270 connection->reject_service_category = category; 271 connection->error_code = BAD_LENGTH; 272 return 1; 273 } 274 break; 275 case AVDTP_RECOVERY: 276 if (cap_len < 3){ 277 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 278 connection->reject_service_category = category; 279 connection->error_code = BAD_RECOVERY_FORMAT; 280 return 1; 281 } 282 break; 283 case AVDTP_CONTENT_PROTECTION: 284 if (cap_len < 2){ 285 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 286 connection->reject_service_category = category; 287 connection->error_code = BAD_CP_FORMAT; 288 return 1; 289 } 290 break; 291 case AVDTP_HEADER_COMPRESSION: 292 break; 293 case AVDTP_MULTIPLEXING: 294 break; 295 case AVDTP_MEDIA_CODEC: 296 break; 297 default: 298 break; 299 } 300 return 0; 301 } 302 303 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 304 if (size == 0) return 0; 305 306 uint16_t registered_service_categories = 0; 307 int pos = 0; 308 int i; 309 avdtp_service_category_t category = (avdtp_service_category_t)packet[pos++]; 310 uint8_t cap_len = packet[pos++]; 311 312 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 313 int processed_cap_len = 0; 314 int rfa = 0; 315 316 while (pos < size){ 317 if (cap_len > size - pos){ 318 connection->reject_service_category = category; 319 connection->error_code = BAD_LENGTH; 320 return 0; 321 } 322 rfa = 0; 323 processed_cap_len = pos; 324 switch(category){ 325 case AVDTP_RECOVERY: 326 caps->recovery.recovery_type = packet[pos++]; 327 caps->recovery.maximum_recovery_window_size = packet[pos++]; 328 caps->recovery.maximum_number_media_packets = packet[pos++]; 329 break; 330 case AVDTP_CONTENT_PROTECTION: 331 caps->content_protection.cp_type = big_endian_read_16(packet, pos); 332 pos+=2; 333 334 caps->content_protection.cp_type_value_len = cap_len - 2; 335 pos += caps->content_protection.cp_type_value_len; 336 337 // connection->reject_service_category = category; 338 // connection->error_code = UNSUPPORTED_CONFIGURATION; 339 // support for content protection goes here 340 break; 341 342 case AVDTP_HEADER_COMPRESSION: 343 caps->header_compression.back_ch = packet[pos] >> 7; 344 caps->header_compression.media = packet[pos] >> 6; 345 caps->header_compression.recovery = packet[pos] >> 5; 346 pos++; 347 break; 348 case AVDTP_MULTIPLEXING: 349 caps->multiplexing_mode.fragmentation = packet[pos++] >> 7; 350 // read [tsid, tcid] for media, reporting. recovery respectively 351 caps->multiplexing_mode.transport_identifiers_num = 3; 352 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 353 caps->multiplexing_mode.transport_session_identifiers[i] = packet[pos++] >> 7; 354 caps->multiplexing_mode.tcid[i] = packet[pos++] >> 7; 355 } 356 break; 357 case AVDTP_MEDIA_CODEC: 358 caps->media_codec.media_type = (avdtp_media_type_t)(packet[pos++] >> 4); 359 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(packet[pos++]); 360 caps->media_codec.media_codec_information_len = cap_len - 2; 361 caps->media_codec.media_codec_information = &packet[pos]; 362 pos += caps->media_codec.media_codec_information_len; 363 break; 364 case AVDTP_MEDIA_TRANSPORT: 365 case AVDTP_REPORTING: 366 case AVDTP_DELAY_REPORTING: 367 pos += cap_len; 368 break; 369 default: 370 pos += cap_len; 371 rfa = 1; 372 break; 373 } 374 processed_cap_len = pos - processed_cap_len; 375 376 if (cap_len == processed_cap_len){ 377 if (!rfa) { 378 registered_service_categories = store_bit16(registered_service_categories, category, 1); 379 } 380 if (pos < size-2){ 381 //int old_pos = pos; 382 category = (avdtp_service_category_t)packet[pos++]; 383 cap_len = packet[pos++]; 384 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 385 } 386 } 387 } 388 return registered_service_categories; 389 } 390 391 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){ 392 if (signaling_packet->offset) return; 393 uint8_t pack_all_capabilities = 1; 394 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 395 int i; 396 397 signaling_packet->size = 0; 398 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 399 400 401 switch (identifier) { 402 case AVDTP_SI_GET_CAPABILITIES: 403 pack_all_capabilities = 0; 404 break; 405 case AVDTP_SI_GET_ALL_CAPABILITIES: 406 pack_all_capabilities = 1; 407 break; 408 case AVDTP_SI_SET_CONFIGURATION: 409 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 410 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 411 signaling_packet->message_type = AVDTP_CMD_MSG; 412 break; 413 case AVDTP_SI_RECONFIGURE: 414 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 415 signaling_packet->message_type = AVDTP_CMD_MSG; 416 break; 417 default: 418 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 419 break; 420 } 421 422 for (i = 1; i < 9; i++){ 423 int registered_category = get_bit16(registered_service_categories, i); 424 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION || identifier == AVDTP_SI_RECONFIGURE)){ 425 // TODO: introduce bitmap of mandatory categories 426 if (i == 1){ 427 registered_category = 1; 428 } 429 } 430 if (registered_category){ 431 // service category 432 signaling_packet->command[signaling_packet->size++] = i; 433 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); 434 } 435 } 436 437 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 438 signaling_packet->transaction_label = transaction_label; 439 } 440 441 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 442 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 443 int data_len = 0; 444 445 uint16_t offset = signaling_packet->offset; 446 uint16_t pos = 1; 447 448 if (offset == 0){ 449 if (signaling_packet->size <= mtu - 2){ 450 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 451 out_buffer[pos++] = signaling_packet->signal_identifier; 452 data_len = signaling_packet->size; 453 } else { 454 signaling_packet->packet_type = AVDTP_START_PACKET; 455 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 456 out_buffer[pos++] = signaling_packet->signal_identifier; 457 data_len = mtu - 3; 458 signaling_packet->offset = data_len; 459 } 460 } else { 461 int remaining_bytes = signaling_packet->size - offset; 462 if (remaining_bytes <= mtu - 1){ 463 signaling_packet->packet_type = AVDTP_END_PACKET; 464 data_len = remaining_bytes; 465 signaling_packet->offset = 0; 466 } else{ 467 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 468 data_len = mtu - 1; 469 signaling_packet->offset += data_len; 470 } 471 } 472 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 473 memcpy(out_buffer+pos, signaling_packet->command + offset, data_len); 474 pos += data_len; 475 return pos; 476 } 477 478 479 void avdtp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t avdtp_cid, bd_addr_t addr, uint8_t status){ 480 if (!callback) return; 481 uint8_t event[12]; 482 int pos = 0; 483 event[pos++] = HCI_EVENT_AVDTP_META; 484 event[pos++] = sizeof(event) - 2; 485 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 486 little_endian_store_16(event, pos, avdtp_cid); 487 pos += 2; 488 reverse_bd_addr(addr,&event[pos]); 489 pos += 6; 490 event[pos++] = status; 491 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 492 } 493 494 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){ 495 if (!callback) return; 496 uint8_t event[8]; 497 int pos = 0; 498 event[pos++] = HCI_EVENT_AVDTP_META; 499 event[pos++] = sizeof(event) - 2; 500 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 501 little_endian_store_16(event, pos, avdtp_cid); 502 pos += 2; 503 event[pos++] = seid; 504 little_endian_store_16(event, pos, sequence_number); 505 pos += 2; 506 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 507 } 508 509 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){ 510 if (!callback) return; 511 uint8_t event[8]; 512 int pos = 0; 513 event[pos++] = HCI_EVENT_AVDTP_META; 514 event[pos++] = sizeof(event) - 2; 515 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 516 little_endian_store_16(event, pos, avdtp_cid); 517 pos += 2; 518 event[pos++] = int_seid; 519 event[pos++] = acp_seid; 520 event[pos++] = status; 521 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 522 } 523 524 void avdtp_signaling_emit_sep(btstack_packet_handler_t callback, uint16_t avdtp_cid, avdtp_sep_t sep){ 525 if (!callback) return; 526 uint8_t event[9]; 527 int pos = 0; 528 event[pos++] = HCI_EVENT_AVDTP_META; 529 event[pos++] = sizeof(event) - 2; 530 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 531 little_endian_store_16(event, pos, avdtp_cid); 532 pos += 2; 533 event[pos++] = sep.seid; 534 event[pos++] = sep.in_use; 535 event[pos++] = sep.media_type; 536 event[pos++] = sep.type; 537 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 538 } 539 540 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){ 541 if (!callback) return; 542 uint8_t event[8]; 543 int pos = 0; 544 event[pos++] = HCI_EVENT_AVDTP_META; 545 event[pos++] = sizeof(event) - 2; 546 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 547 little_endian_store_16(event, pos, avdtp_cid); 548 pos += 2; 549 event[pos++] = int_seid; 550 event[pos++] = identifier; 551 event[pos++] = status; 552 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 553 } 554 555 void avdtp_signaling_emit_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, avdtp_signal_identifier_t identifier){ 556 if (!callback) return; 557 uint8_t event[7]; 558 int pos = 0; 559 event[pos++] = HCI_EVENT_AVDTP_META; 560 event[pos++] = sizeof(event) - 2; 561 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 562 little_endian_store_16(event, pos, avdtp_cid); 563 pos += 2; 564 event[pos++] = int_seid; 565 event[pos++] = identifier; 566 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 567 } 568 569 void avdtp_signaling_emit_general_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, avdtp_signal_identifier_t identifier){ 570 if (!callback) return; 571 uint8_t event[7]; 572 int pos = 0; 573 event[pos++] = HCI_EVENT_AVDTP_META; 574 event[pos++] = sizeof(event) - 2; 575 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 576 little_endian_store_16(event, pos, avdtp_cid); 577 pos += 2; 578 event[pos++] = int_seid; 579 event[pos++] = identifier; 580 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 581 } 582 583 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){ 584 if (!callback) return; 585 uint8_t event[15]; 586 int pos = 0; 587 event[pos++] = HCI_EVENT_AVDTP_META; 588 event[pos++] = sizeof(event) - 2; 589 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 590 little_endian_store_16(event, pos, avdtp_cid); 591 pos += 2; 592 event[pos++] = int_seid; 593 event[pos++] = acp_seid; 594 event[pos++] = media_codec.media_type; 595 event[pos++] = media_codec.media_codec_information[0] >> 4; 596 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 597 event[pos++] = media_codec.media_codec_information[1] >> 4; 598 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 599 event[pos++] = media_codec.media_codec_information[1] & 0x03; 600 event[pos++] = media_codec.media_codec_information[2]; 601 event[pos++] = media_codec.media_codec_information[3]; 602 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 603 } 604 605 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){ 606 if (!callback) return; 607 uint8_t event[111]; 608 int pos = 0; 609 event[pos++] = HCI_EVENT_AVDTP_META; 610 event[pos++] = sizeof(event) - 2; 611 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 612 little_endian_store_16(event, pos, avdtp_cid); 613 pos += 2; 614 event[pos++] = int_seid; 615 event[pos++] = acp_seid; 616 event[pos++] = media_codec.media_type; 617 little_endian_store_16(event, pos, media_codec.media_codec_type); 618 pos += 2; 619 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 620 pos += 2; 621 if (media_codec.media_codec_information_len < 100){ 622 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 623 } else { 624 memcpy(event+pos, media_codec.media_codec_information, 100); 625 } 626 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 627 } 628 629 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){ 630 if (!callback) return; 631 uint8_t event[16+2]; 632 int pos = 0; 633 event[pos++] = HCI_EVENT_AVDTP_META; 634 event[pos++] = sizeof(event) - 2; 635 636 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 637 little_endian_store_16(event, pos, avdtp_cid); 638 pos += 2; 639 event[pos++] = int_seid; 640 event[pos++] = acp_seid; 641 event[pos++] = reconfigure; 642 643 uint8_t num_channels = 0; 644 uint16_t sampling_frequency = 0; 645 uint8_t subbands = 0; 646 uint8_t block_length = 0; 647 648 uint8_t sampling_frequency_bitmap = media_codec.media_codec_information[0] >> 4; 649 uint8_t channel_mode_bitmap = media_codec.media_codec_information[0] & 0x0F; 650 uint8_t block_length_bitmap = media_codec.media_codec_information[1] >> 4; 651 uint8_t subbands_bitmap = (media_codec.media_codec_information[1] & 0x0F) >> 2; 652 653 if (channel_mode_bitmap & AVDTP_SBC_MONO){ 654 num_channels = 1; 655 } 656 if ( (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 657 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 658 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL) ){ 659 num_channels = 2; 660 } 661 662 if (sampling_frequency_bitmap & AVDTP_SBC_16000){ 663 sampling_frequency = 16000; 664 } 665 if (sampling_frequency_bitmap & AVDTP_SBC_32000){ 666 sampling_frequency = 32000; 667 } 668 if (sampling_frequency_bitmap & AVDTP_SBC_44100){ 669 sampling_frequency = 44100; 670 } 671 if (sampling_frequency_bitmap & AVDTP_SBC_48000){ 672 sampling_frequency = 48000; 673 } 674 675 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 676 subbands = 4; 677 } 678 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 679 subbands = 8; 680 } 681 682 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 683 block_length = 4; 684 } 685 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 686 block_length = 8; 687 } 688 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 689 block_length = 12; 690 } 691 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 692 block_length = 16; 693 } 694 695 event[pos++] = media_codec.media_type; 696 little_endian_store_16(event, pos, sampling_frequency); 697 pos += 2; 698 699 event[pos++] = channel_mode_bitmap; 700 event[pos++] = num_channels; 701 event[pos++] = block_length; 702 event[pos++] = subbands; 703 event[pos++] = media_codec.media_codec_information[1] & 0x03; 704 event[pos++] = media_codec.media_codec_information[2]; 705 event[pos++] = media_codec.media_codec_information[3]; 706 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 707 } 708 709 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){ 710 if (!callback) return; 711 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, int_seid, acp_seid, media_codec, 0); 712 } 713 714 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){ 715 if (!callback) return; 716 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, int_seid, acp_seid, media_codec, 1); 717 } 718 719 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){ 720 uint8_t event[112]; 721 int pos = 0; 722 event[pos++] = HCI_EVENT_AVDTP_META; 723 event[pos++] = sizeof(event) - 2; 724 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 725 little_endian_store_16(event, pos, avdtp_cid); 726 pos += 2; 727 event[pos++] = int_seid; 728 event[pos++] = acp_seid; 729 event[pos++] = reconfigure; 730 731 event[pos++] = media_codec.media_type; 732 little_endian_store_16(event, pos, media_codec.media_codec_type); 733 pos += 2; 734 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 735 pos += 2; 736 737 if (media_codec.media_codec_information_len < 100){ 738 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 739 } else { 740 memcpy(event+pos, media_codec.media_codec_information, 100); 741 } 742 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 743 } 744 745 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){ 746 if (!callback) return; 747 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, int_seid, acp_seid, media_codec, 0); 748 } 749 750 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){ 751 if (!callback) return; 752 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, int_seid, acp_seid, media_codec, 1); 753 } 754 755 756 void avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 757 connection->wait_to_send_acceptor = 1; 758 l2cap_request_can_send_now_event(l2cap_cid); 759 } 760 void avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 761 connection->wait_to_send_initiator = 1; 762 l2cap_request_can_send_now_event(l2cap_cid); 763 } 764 void avdtp_request_can_send_now_self(avdtp_connection_t * connection, uint16_t l2cap_cid){ 765 connection->wait_to_send_self = 1; 766 l2cap_request_can_send_now_event(l2cap_cid); 767 } 768 769 uint8_t avdtp_get_index_of_remote_stream_endpoint_with_seid(avdtp_stream_endpoint_t * stream_endpoint, uint16_t seid){ 770 if (!stream_endpoint->connection) return AVDTP_INVALID_SEP_INDEX; 771 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == seid){ 772 return stream_endpoint->remote_sep_index; 773 } 774 int i; 775 for (i=0; i < stream_endpoint->connection->remote_seps_num; i++){ 776 if (stream_endpoint->connection->remote_seps[i].seid == seid){ 777 return i; 778 } 779 } 780 return AVDTP_INVALID_SEP_INDEX; 781 } 782 783 uint8_t avdtp_find_remote_sep(avdtp_connection_t * connection, uint8_t remote_seid){ 784 if (!connection) return AVDTP_INVALID_SEP_INDEX; 785 int i; 786 for (i = 0; i < connection->remote_seps_num; i++){ 787 if (connection->remote_seps[i].seid == remote_seid){ 788 return i; 789 } 790 } 791 return AVDTP_INVALID_SEP_INDEX; 792 } 793