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