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 39 #include <stdint.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include "btstack.h" 46 #include "avdtp.h" 47 #include "avdtp_util.h" 48 49 inline uint8_t avdtp_header(uint8_t tr_label, avdtp_packet_type_t packet_type, avdtp_message_type_t msg_type){ 50 return (tr_label<<4) | ((uint8_t)packet_type<<2) | (uint8_t)msg_type; 51 } 52 53 void avdtp_initialize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 54 stream_endpoint->connection = NULL; 55 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 56 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 57 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 58 stream_endpoint->remote_sep_index = 0; 59 stream_endpoint->media_disconnect = 0; 60 stream_endpoint->remote_seps_num = 0; 61 stream_endpoint->sep.in_use = 0; 62 memset(stream_endpoint->remote_seps, 0, sizeof(stream_endpoint->remote_seps)); 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_con_handle(hci_con_handle_t con_handle, 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->con_handle != con_handle) continue; 95 return connection; 96 } 97 return NULL; 98 } 99 100 avdtp_connection_t * avdtp_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid, avdtp_context_t * context){ 101 btstack_linked_list_iterator_t it; 102 btstack_linked_list_iterator_init(&it, &context->connections); 103 while (btstack_linked_list_iterator_has_next(&it)){ 104 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 105 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 106 return connection; 107 } 108 return NULL; 109 } 110 111 avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_l2cap_cid(uint16_t l2cap_cid, avdtp_context_t * context){ 112 btstack_linked_list_iterator_t it; 113 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 114 while (btstack_linked_list_iterator_has_next(&it)){ 115 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 116 if (stream_endpoint->l2cap_media_cid == l2cap_cid){ 117 return stream_endpoint; 118 } 119 if (stream_endpoint->l2cap_reporting_cid == l2cap_cid){ 120 return stream_endpoint; 121 } 122 if (stream_endpoint->l2cap_recovery_cid == l2cap_cid){ 123 return stream_endpoint; 124 } 125 } 126 return NULL; 127 } 128 129 avdtp_stream_endpoint_t * avdtp_stream_endpoint_with_seid(uint8_t 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 if (stream_endpoint->sep.seid == seid){ 135 return stream_endpoint; 136 } 137 } 138 return NULL; 139 } 140 141 avdtp_stream_endpoint_t * avdtp_stream_endpoint_associated_with_acp_seid(uint16_t acp_seid, avdtp_context_t * context){ 142 btstack_linked_list_iterator_t it; 143 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 144 while (btstack_linked_list_iterator_has_next(&it)){ 145 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 146 if (stream_endpoint->remote_sep_index >= 0 && stream_endpoint->remote_sep_index < MAX_NUM_SEPS){ 147 if (stream_endpoint->remote_seps[stream_endpoint->remote_sep_index].seid == acp_seid){ 148 return stream_endpoint; 149 } 150 } 151 } 152 return NULL; 153 } 154 155 int get_bit16(uint16_t bitmap, int position){ 156 return (bitmap >> position) & 1; 157 } 158 159 uint8_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 160 if (value){ 161 bitmap |= 1 << position; 162 } else { 163 bitmap &= ~ (1 << position); 164 } 165 return bitmap; 166 } 167 168 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 169 int pos = 0; 170 if (size < 2) return pos; 171 signaling_header->transaction_label = packet[pos] >> 4; 172 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 173 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 174 pos++; 175 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 176 switch (signaling_header->packet_type){ 177 case AVDTP_SINGLE_PACKET: 178 signaling_header->num_packets = 0; 179 signaling_header->offset = 0; 180 signaling_header->size = 0; 181 break; 182 case AVDTP_END_PACKET: 183 signaling_header->num_packets = 0; 184 break; 185 case AVDTP_START_PACKET: 186 signaling_header->num_packets = packet[pos++]; 187 signaling_header->size = 0; 188 signaling_header->offset = 0; 189 break; 190 case AVDTP_CONTINUE_PACKET: 191 if (signaling_header->num_packets <= 0) { 192 printf(" ERROR: wrong num fragmented packets\n"); 193 break; 194 } 195 signaling_header->num_packets--; 196 break; 197 } 198 signaling_header->signal_identifier = packet[pos++] & 0x3f; 199 return pos; 200 } 201 202 int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){ 203 UNUSED(size); 204 205 int i; 206 // pos = 0 reserved for length 207 int pos = 1; 208 switch(category){ 209 case AVDTP_MEDIA_TRANSPORT: 210 case AVDTP_REPORTING: 211 break; 212 case AVDTP_DELAY_REPORTING: 213 if (!pack_all_capabilities) break; 214 break; 215 case AVDTP_RECOVERY: 216 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 217 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 218 buffer[pos++] = caps.recovery.maximum_number_media_packets; 219 break; 220 case AVDTP_CONTENT_PROTECTION: 221 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 222 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 223 pos += 2; 224 memcpy(buffer+pos, caps.content_protection.cp_type_value, caps.content_protection.cp_type_value_len); 225 break; 226 case AVDTP_HEADER_COMPRESSION: 227 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 228 break; 229 case AVDTP_MULTIPLEXING: 230 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 231 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 232 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 233 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 234 // media, reporting. recovery 235 } 236 break; 237 case AVDTP_MEDIA_CODEC: 238 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 239 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 240 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 241 buffer[pos++] = caps.media_codec.media_codec_information[i]; 242 } 243 break; 244 default: 245 break; 246 } 247 buffer[0] = pos - 1; // length 248 return pos; 249 } 250 251 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_service_category_t category, uint8_t cap_len){ 252 connection->error_code = 0; 253 254 if (category == AVDTP_SERVICE_CATEGORY_INVALID_0 || 255 (category == AVDTP_SERVICE_CATEGORY_INVALID_FF && connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE)){ 256 printf(" ERROR: BAD SERVICE CATEGORY %d\n", category); 257 connection->reject_service_category = category; 258 connection->error_code = BAD_SERV_CATEGORY; 259 return 1; 260 } 261 262 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 263 if (category != AVDTP_CONTENT_PROTECTION && category != AVDTP_MEDIA_CODEC){ 264 printf(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 265 connection->reject_service_category = category; 266 connection->error_code = INVALID_CAPABILITIES; 267 return 1; 268 } 269 } 270 271 switch(category){ 272 case AVDTP_MEDIA_TRANSPORT: 273 if (cap_len != 0){ 274 printf(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 275 connection->reject_service_category = category; 276 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 277 return 1; 278 } 279 break; 280 case AVDTP_REPORTING: 281 case AVDTP_DELAY_REPORTING: 282 if (cap_len != 0){ 283 printf(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 284 connection->reject_service_category = category; 285 connection->error_code = BAD_LENGTH; 286 return 1; 287 } 288 break; 289 case AVDTP_RECOVERY: 290 if (cap_len < 3){ 291 printf(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 292 connection->reject_service_category = category; 293 connection->error_code = BAD_RECOVERY_FORMAT; 294 return 1; 295 } 296 break; 297 case AVDTP_CONTENT_PROTECTION: 298 if (cap_len < 2){ 299 printf(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 300 connection->reject_service_category = category; 301 connection->error_code = BAD_CP_FORMAT; 302 return 1; 303 } 304 break; 305 case AVDTP_HEADER_COMPRESSION: 306 break; 307 case AVDTP_MULTIPLEXING: 308 break; 309 case AVDTP_MEDIA_CODEC: 310 break; 311 default: 312 break; 313 } 314 return 0; 315 } 316 317 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 318 if (size == 0) return 0; 319 320 uint16_t registered_service_categories = 0; 321 int pos = 0; 322 int i; 323 avdtp_service_category_t category = (avdtp_service_category_t)packet[pos++]; 324 uint8_t cap_len = packet[pos++]; 325 326 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 327 int processed_cap_len = 0; 328 int rfa = 0; 329 //printf(" size %d, cat size %d\n", size, cap_len); 330 331 while (pos < size){ 332 if (cap_len > size - pos){ 333 connection->reject_service_category = category; 334 connection->error_code = BAD_LENGTH; 335 return 0; 336 } 337 rfa = 0; 338 processed_cap_len = pos; 339 switch(category){ 340 case AVDTP_RECOVERY: 341 caps->recovery.recovery_type = packet[pos++]; 342 caps->recovery.maximum_recovery_window_size = packet[pos++]; 343 caps->recovery.maximum_number_media_packets = packet[pos++]; 344 break; 345 case AVDTP_CONTENT_PROTECTION: 346 caps->content_protection.cp_type = big_endian_read_16(packet, pos); 347 pos+=2; 348 349 caps->content_protection.cp_type_value_len = cap_len - 2; 350 pos += caps->content_protection.cp_type_value_len; 351 352 // connection->reject_service_category = category; 353 // connection->error_code = UNSUPPORTED_CONFIGURATION; 354 // support for content protection goes here 355 break; 356 357 case AVDTP_HEADER_COMPRESSION: 358 caps->header_compression.back_ch = packet[pos] >> 7; 359 caps->header_compression.media = packet[pos] >> 6; 360 caps->header_compression.recovery = packet[pos] >> 5; 361 pos++; 362 break; 363 case AVDTP_MULTIPLEXING: 364 caps->multiplexing_mode.fragmentation = packet[pos++] >> 7; 365 // read [tsid, tcid] for media, reporting. recovery respectively 366 caps->multiplexing_mode.transport_identifiers_num = 3; 367 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 368 caps->multiplexing_mode.transport_session_identifiers[i] = packet[pos++] >> 7; 369 caps->multiplexing_mode.tcid[i] = packet[pos++] >> 7; 370 } 371 break; 372 case AVDTP_MEDIA_CODEC: 373 caps->media_codec.media_type = packet[pos++] >> 4; 374 caps->media_codec.media_codec_type = packet[pos++]; 375 caps->media_codec.media_codec_information_len = cap_len - 2; 376 caps->media_codec.media_codec_information = &packet[pos]; 377 pos += caps->media_codec.media_codec_information_len; 378 break; 379 case AVDTP_MEDIA_TRANSPORT: 380 case AVDTP_REPORTING: 381 case AVDTP_DELAY_REPORTING: 382 pos += cap_len; 383 break; 384 default: 385 pos += cap_len; 386 rfa = 1; 387 break; 388 } 389 processed_cap_len = pos - processed_cap_len; 390 391 if (cap_len == processed_cap_len){ 392 if (!rfa) { 393 registered_service_categories = store_bit16(registered_service_categories, category, 1); 394 } 395 if (pos < size-2){ 396 //int old_pos = pos; 397 category = (avdtp_service_category_t)packet[pos++]; 398 cap_len = packet[pos++]; 399 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 400 //printf("category %d, pos %d + 2 + %d -> %d\n", category, old_pos, cap_len, pos + cap_len); 401 //printf_hexdump(packet+old_pos, size-old_pos); 402 } 403 } 404 } 405 return registered_service_categories; 406 } 407 408 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){ 409 if (signaling_packet->offset) return; 410 uint8_t pack_all_capabilities = 1; 411 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 412 int i; 413 414 signaling_packet->size = 0; 415 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 416 417 418 switch (identifier) { 419 case AVDTP_SI_GET_CAPABILITIES: 420 pack_all_capabilities = 0; 421 break; 422 case AVDTP_SI_GET_ALL_CAPABILITIES: 423 pack_all_capabilities = 1; 424 break; 425 case AVDTP_SI_SET_CONFIGURATION: 426 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 427 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 428 signaling_packet->message_type = AVDTP_CMD_MSG; 429 break; 430 case AVDTP_SI_RECONFIGURE: 431 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 432 signaling_packet->message_type = AVDTP_CMD_MSG; 433 break; 434 default: 435 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 436 break; 437 } 438 439 // printf("registered_service_categories: 0x%02x\n", registered_service_categories); 440 441 // printf("command before packing:\n"); 442 // printf_hexdump(signaling_packet->command, signaling_packet->size); 443 for (i = 1; i < 9; i++){ 444 int registered_category = get_bit16(registered_service_categories, i); 445 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION || identifier == AVDTP_SI_RECONFIGURE){ 446 // TODO: introduce bitmap of mandatory categories 447 if (i == 1){ 448 registered_category = 1; 449 } 450 } 451 if (registered_category){ 452 // service category 453 // printf("pack service category: %d\n", i); 454 signaling_packet->command[signaling_packet->size++] = i; 455 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); 456 } 457 } 458 // printf("command after packing:\n"); 459 // printf_hexdump(signaling_packet->command, signaling_packet->size); 460 461 signaling_packet->signal_identifier = identifier; 462 signaling_packet->transaction_label = transaction_label; 463 } 464 465 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 466 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 467 // hack for test 468 // int mtu = 6; 469 int data_len = 0; 470 471 uint16_t offset = signaling_packet->offset; 472 uint16_t pos = 1; 473 // printf(" avdtp_signaling_create_fragment offset %d, packet type %d\n", signaling_packet->offset, signaling_packet->packet_type); 474 475 if (offset == 0){ 476 if (signaling_packet->size <= mtu - 2){ 477 // printf(" AVDTP_SINGLE_PACKET\n"); 478 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 479 out_buffer[pos++] = signaling_packet->signal_identifier; 480 data_len = signaling_packet->size; 481 } else { 482 signaling_packet->packet_type = AVDTP_START_PACKET; 483 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 484 out_buffer[pos++] = signaling_packet->signal_identifier; 485 data_len = mtu - 3; 486 signaling_packet->offset = data_len; 487 // printf(" AVDTP_START_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 488 } 489 } else { 490 int remaining_bytes = signaling_packet->size - offset; 491 if (remaining_bytes <= mtu - 1){ 492 //signaling_packet->fragmentation = 1; 493 signaling_packet->packet_type = AVDTP_END_PACKET; 494 data_len = remaining_bytes; 495 signaling_packet->offset = 0; 496 // printf(" AVDTP_END_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 497 } else{ 498 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 499 data_len = mtu - 1; 500 signaling_packet->offset += data_len; 501 // printf(" AVDTP_CONTINUE_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 502 } 503 } 504 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 505 memcpy(out_buffer+pos, signaling_packet->command + offset, data_len); 506 pos += data_len; 507 return pos; 508 } 509 510 511 void avdtp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t con_handle, bd_addr_t addr, uint8_t status){ 512 if (!callback) return; 513 uint8_t event[12]; 514 int pos = 0; 515 event[pos++] = HCI_EVENT_AVDTP_META; 516 event[pos++] = sizeof(event) - 2; 517 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 518 little_endian_store_16(event, pos, con_handle); 519 pos += 2; 520 reverse_bd_addr(addr,&event[pos]); 521 pos += 6; 522 event[pos++] = status; 523 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 524 } 525 526 void avdtp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t con_handle, uint8_t status){ 527 if (!callback) return; 528 uint8_t event[6]; 529 int pos = 0; 530 event[pos++] = HCI_EVENT_AVDTP_META; 531 event[pos++] = sizeof(event) - 2; 532 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 533 little_endian_store_16(event, pos, con_handle); 534 pos += 2; 535 event[pos++] = status; 536 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 537 } 538 539 void avdtp_signaling_emit_sep(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_sep_t sep){ 540 if (!callback) return; 541 uint8_t event[9]; 542 int pos = 0; 543 event[pos++] = HCI_EVENT_AVDTP_META; 544 event[pos++] = sizeof(event) - 2; 545 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 546 little_endian_store_16(event, pos, con_handle); 547 pos += 2; 548 event[pos++] = sep.seid; 549 event[pos++] = sep.in_use; 550 event[pos++] = sep.media_type; 551 event[pos++] = sep.type; 552 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 553 } 554 555 void avdtp_signaling_emit_accept(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_signal_identifier_t identifier, uint8_t status){ 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_ACCEPT; 562 little_endian_store_16(event, pos, con_handle); 563 pos += 2; 564 event[pos++] = identifier; 565 event[pos++] = status; 566 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 567 } 568 569 void avdtp_signaling_emit_reject(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_signal_identifier_t identifier){ 570 if (!callback) return; 571 uint8_t event[6]; 572 int pos = 0; 573 event[pos++] = HCI_EVENT_AVDTP_META; 574 event[pos++] = sizeof(event) - 2; 575 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 576 little_endian_store_16(event, pos, con_handle); 577 pos += 2; 578 event[pos++] = identifier; 579 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 580 } 581 582 void avdtp_signaling_emit_general_reject(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_signal_identifier_t identifier){ 583 if (!callback) return; 584 uint8_t event[6]; 585 int pos = 0; 586 event[pos++] = HCI_EVENT_AVDTP_META; 587 event[pos++] = sizeof(event) - 2; 588 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 589 little_endian_store_16(event, pos, con_handle); 590 pos += 2; 591 event[pos++] = identifier; 592 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 593 } 594 595 void avdtp_signaling_emit_media_codec_sbc_capability(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 596 if (!callback) return; 597 uint8_t event[13]; 598 int pos = 0; 599 event[pos++] = HCI_EVENT_AVDTP_META; 600 event[pos++] = sizeof(event) - 2; 601 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 602 little_endian_store_16(event, pos, con_handle); 603 pos += 2; 604 event[pos++] = media_codec.media_type; 605 event[pos++] = media_codec.media_codec_information[0] >> 4; 606 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 607 event[pos++] = media_codec.media_codec_information[1] >> 4; 608 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 609 event[pos++] = media_codec.media_codec_information[1] & 0x03; 610 event[pos++] = media_codec.media_codec_information[2]; 611 event[pos++] = media_codec.media_codec_information[3]; 612 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 613 } 614 615 void avdtp_signaling_emit_media_codec_other_capability(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 616 if (!callback) return; 617 uint8_t event[109]; 618 int pos = 0; 619 event[pos++] = HCI_EVENT_AVDTP_META; 620 event[pos++] = sizeof(event) - 2; 621 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 622 little_endian_store_16(event, pos, con_handle); 623 pos += 2; 624 event[pos++] = media_codec.media_type; 625 little_endian_store_16(event, pos, media_codec.media_codec_type); 626 pos += 2; 627 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 628 pos += 2; 629 if (media_codec.media_codec_information_len < 100){ 630 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 631 } else { 632 memcpy(event+pos, media_codec.media_codec_information, 100); 633 } 634 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 635 } 636 637 static inline void avdtp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec, uint8_t reconfigure){ 638 if (!callback) return; 639 uint8_t event[14+2]; 640 int pos = 0; 641 event[pos++] = HCI_EVENT_AVDTP_META; 642 event[pos++] = sizeof(event) - 2; 643 644 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 645 little_endian_store_16(event, pos, con_handle); 646 pos += 2; 647 event[pos++] = reconfigure; 648 649 uint8_t num_channels = 0; 650 uint16_t sampling_frequency = 0; 651 uint8_t subbands = 0; 652 uint8_t block_length = 0; 653 654 uint8_t sampling_frequency_bitmap = media_codec.media_codec_information[0] >> 4; 655 uint8_t channel_mode_bitmap = media_codec.media_codec_information[0] & 0x0F; 656 uint8_t block_length_bitmap = media_codec.media_codec_information[1] >> 4; 657 uint8_t subbands_bitmap = (media_codec.media_codec_information[1] & 0x0F) >> 2; 658 659 if (channel_mode_bitmap & AVDTP_SBC_MONO){ 660 num_channels = 1; 661 } 662 if ( (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 663 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 664 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL) ){ 665 num_channels = 2; 666 } 667 668 if (sampling_frequency_bitmap & AVDTP_SBC_16000){ 669 sampling_frequency = 16000; 670 } 671 if (sampling_frequency_bitmap & AVDTP_SBC_32000){ 672 sampling_frequency = 32000; 673 } 674 if (sampling_frequency_bitmap & AVDTP_SBC_44100){ 675 sampling_frequency = 44100; 676 } 677 if (sampling_frequency_bitmap & AVDTP_SBC_48000){ 678 sampling_frequency = 48000; 679 } 680 681 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 682 subbands = 4; 683 } 684 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 685 subbands = 8; 686 } 687 688 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 689 block_length = 4; 690 } 691 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 692 block_length = 8; 693 } 694 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 695 block_length = 12; 696 } 697 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 698 block_length = 16; 699 } 700 701 event[pos++] = media_codec.media_type; 702 little_endian_store_16(event, pos, sampling_frequency); 703 pos += 2; 704 705 event[pos++] = channel_mode_bitmap; 706 event[pos++] = num_channels; 707 event[pos++] = block_length; 708 event[pos++] = subbands; 709 event[pos++] = media_codec.media_codec_information[1] & 0x03; 710 event[pos++] = media_codec.media_codec_information[2]; 711 event[pos++] = media_codec.media_codec_information[3]; 712 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 713 } 714 715 void avdtp_signaling_emit_media_codec_sbc_configuration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 716 if (!callback) return; 717 avdtp_signaling_emit_media_codec_sbc(callback, con_handle, media_codec, 0); 718 } 719 720 void avdtp_signaling_emit_media_codec_sbc_reconfiguration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 721 if (!callback) return; 722 avdtp_signaling_emit_media_codec_sbc(callback, con_handle, media_codec, 1); 723 } 724 725 static inline void avdtp_signaling_emit_media_codec_other(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec, uint8_t reconfigure){ 726 uint8_t event[110]; 727 int pos = 0; 728 event[pos++] = HCI_EVENT_AVDTP_META; 729 event[pos++] = sizeof(event) - 2; 730 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 731 little_endian_store_16(event, pos, con_handle); 732 pos += 2; 733 734 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 con_handle, adtvp_media_codec_capabilities_t media_codec){ 751 if (!callback) return; 752 avdtp_signaling_emit_media_codec_other(callback, con_handle, media_codec, 0); 753 } 754 755 void avdtp_signaling_emit_media_codec_other_reconfiguration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 756 if (!callback) return; 757 avdtp_signaling_emit_media_codec_other(callback, con_handle, 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->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->remote_seps_num; i++){ 780 if (stream_endpoint->remote_seps[i].seid == seid){ 781 return i; 782 } 783 } 784 return 0xFF; 785 } 786