1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "avdtp_util.c" 39 40 41 #include <stdint.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 #include "btstack.h" 48 #include "avdtp.h" 49 #include "avdtp_util.h" 50 51 inline uint8_t avdtp_header(uint8_t tr_label, avdtp_packet_type_t packet_type, avdtp_message_type_t msg_type){ 52 return (tr_label<<4) | ((uint8_t)packet_type<<2) | (uint8_t)msg_type; 53 } 54 55 void avdtp_initialize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 56 stream_endpoint->connection = NULL; 57 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 58 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 59 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 60 stream_endpoint->remote_sep_index = 0; 61 stream_endpoint->media_disconnect = 0; 62 stream_endpoint->sep.in_use = 0; 63 stream_endpoint->remote_sep_index = 0; 64 } 65 66 avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_seid(uint16_t seid, avdtp_context_t * context){ 67 btstack_linked_list_iterator_t it; 68 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 69 while (btstack_linked_list_iterator_has_next(&it)){ 70 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 71 if (stream_endpoint->sep.seid == seid){ 72 return stream_endpoint; 73 } 74 } 75 return NULL; 76 } 77 78 avdtp_connection_t * avdtp_connection_for_bd_addr(bd_addr_t addr, avdtp_context_t * context){ 79 btstack_linked_list_iterator_t it; 80 btstack_linked_list_iterator_init(&it, &context->connections); 81 while (btstack_linked_list_iterator_has_next(&it)){ 82 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 83 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 84 return connection; 85 } 86 return NULL; 87 } 88 89 avdtp_connection_t * avdtp_connection_for_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->connection) continue; 148 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == acp_seid){ 149 return stream_endpoint; 150 } 151 } 152 } 153 return NULL; 154 } 155 156 int get_bit16(uint16_t bitmap, int position){ 157 return (bitmap >> position) & 1; 158 } 159 160 uint8_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 161 if (value){ 162 bitmap |= 1 << position; 163 } else { 164 bitmap &= ~ (1 << position); 165 } 166 return bitmap; 167 } 168 169 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 170 int pos = 0; 171 if (size < 2) return pos; 172 signaling_header->transaction_label = packet[pos] >> 4; 173 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 174 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 175 pos++; 176 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 177 switch (signaling_header->packet_type){ 178 case AVDTP_SINGLE_PACKET: 179 signaling_header->num_packets = 0; 180 signaling_header->offset = 0; 181 signaling_header->size = 0; 182 break; 183 case AVDTP_END_PACKET: 184 signaling_header->num_packets = 0; 185 break; 186 case AVDTP_START_PACKET: 187 signaling_header->num_packets = packet[pos++]; 188 signaling_header->size = 0; 189 signaling_header->offset = 0; 190 break; 191 case AVDTP_CONTINUE_PACKET: 192 if (signaling_header->num_packets <= 0) { 193 printf(" ERROR: wrong num fragmented packets\n"); 194 break; 195 } 196 signaling_header->num_packets--; 197 break; 198 } 199 signaling_header->signal_identifier = packet[pos++] & 0x3f; 200 return pos; 201 } 202 203 int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){ 204 UNUSED(size); 205 206 int i; 207 // pos = 0 reserved for length 208 int pos = 1; 209 switch(category){ 210 case AVDTP_MEDIA_TRANSPORT: 211 case AVDTP_REPORTING: 212 break; 213 case AVDTP_DELAY_REPORTING: 214 if (!pack_all_capabilities) break; 215 break; 216 case AVDTP_RECOVERY: 217 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 218 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 219 buffer[pos++] = caps.recovery.maximum_number_media_packets; 220 break; 221 case AVDTP_CONTENT_PROTECTION: 222 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 223 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 224 pos += 2; 225 memcpy(buffer+pos, caps.content_protection.cp_type_value, caps.content_protection.cp_type_value_len); 226 break; 227 case AVDTP_HEADER_COMPRESSION: 228 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 229 break; 230 case AVDTP_MULTIPLEXING: 231 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 232 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 233 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 234 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 235 // media, reporting. recovery 236 } 237 break; 238 case AVDTP_MEDIA_CODEC: 239 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 240 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 241 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 242 buffer[pos++] = caps.media_codec.media_codec_information[i]; 243 } 244 break; 245 default: 246 break; 247 } 248 buffer[0] = pos - 1; // length 249 return pos; 250 } 251 252 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_service_category_t category, uint8_t cap_len){ 253 connection->error_code = 0; 254 255 if (category == AVDTP_SERVICE_CATEGORY_INVALID_0 || 256 (category == AVDTP_SERVICE_CATEGORY_INVALID_FF && connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE)){ 257 printf(" ERROR: BAD SERVICE CATEGORY %d\n", category); 258 connection->reject_service_category = category; 259 connection->error_code = BAD_SERV_CATEGORY; 260 return 1; 261 } 262 263 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 264 if (category != AVDTP_CONTENT_PROTECTION && category != AVDTP_MEDIA_CODEC){ 265 printf(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 266 connection->reject_service_category = category; 267 connection->error_code = INVALID_CAPABILITIES; 268 return 1; 269 } 270 } 271 272 switch(category){ 273 case AVDTP_MEDIA_TRANSPORT: 274 if (cap_len != 0){ 275 printf(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 276 connection->reject_service_category = category; 277 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 278 return 1; 279 } 280 break; 281 case AVDTP_REPORTING: 282 case AVDTP_DELAY_REPORTING: 283 if (cap_len != 0){ 284 printf(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 285 connection->reject_service_category = category; 286 connection->error_code = BAD_LENGTH; 287 return 1; 288 } 289 break; 290 case AVDTP_RECOVERY: 291 if (cap_len < 3){ 292 printf(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 293 connection->reject_service_category = category; 294 connection->error_code = BAD_RECOVERY_FORMAT; 295 return 1; 296 } 297 break; 298 case AVDTP_CONTENT_PROTECTION: 299 if (cap_len < 2){ 300 printf(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 301 connection->reject_service_category = category; 302 connection->error_code = BAD_CP_FORMAT; 303 return 1; 304 } 305 break; 306 case AVDTP_HEADER_COMPRESSION: 307 break; 308 case AVDTP_MULTIPLEXING: 309 break; 310 case AVDTP_MEDIA_CODEC: 311 break; 312 default: 313 break; 314 } 315 return 0; 316 } 317 318 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 319 if (size == 0) return 0; 320 321 uint16_t registered_service_categories = 0; 322 int pos = 0; 323 int i; 324 avdtp_service_category_t category = (avdtp_service_category_t)packet[pos++]; 325 uint8_t cap_len = packet[pos++]; 326 327 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 328 int processed_cap_len = 0; 329 int rfa = 0; 330 //printf(" size %d, cat size %d\n", size, cap_len); 331 332 while (pos < size){ 333 if (cap_len > size - pos){ 334 connection->reject_service_category = category; 335 connection->error_code = BAD_LENGTH; 336 return 0; 337 } 338 rfa = 0; 339 processed_cap_len = pos; 340 switch(category){ 341 case AVDTP_RECOVERY: 342 caps->recovery.recovery_type = packet[pos++]; 343 caps->recovery.maximum_recovery_window_size = packet[pos++]; 344 caps->recovery.maximum_number_media_packets = packet[pos++]; 345 break; 346 case AVDTP_CONTENT_PROTECTION: 347 caps->content_protection.cp_type = big_endian_read_16(packet, pos); 348 pos+=2; 349 350 caps->content_protection.cp_type_value_len = cap_len - 2; 351 pos += caps->content_protection.cp_type_value_len; 352 353 // connection->reject_service_category = category; 354 // connection->error_code = UNSUPPORTED_CONFIGURATION; 355 // support for content protection goes here 356 break; 357 358 case AVDTP_HEADER_COMPRESSION: 359 caps->header_compression.back_ch = packet[pos] >> 7; 360 caps->header_compression.media = packet[pos] >> 6; 361 caps->header_compression.recovery = packet[pos] >> 5; 362 pos++; 363 break; 364 case AVDTP_MULTIPLEXING: 365 caps->multiplexing_mode.fragmentation = packet[pos++] >> 7; 366 // read [tsid, tcid] for media, reporting. recovery respectively 367 caps->multiplexing_mode.transport_identifiers_num = 3; 368 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 369 caps->multiplexing_mode.transport_session_identifiers[i] = packet[pos++] >> 7; 370 caps->multiplexing_mode.tcid[i] = packet[pos++] >> 7; 371 } 372 break; 373 case AVDTP_MEDIA_CODEC: 374 caps->media_codec.media_type = packet[pos++] >> 4; 375 caps->media_codec.media_codec_type = packet[pos++]; 376 caps->media_codec.media_codec_information_len = cap_len - 2; 377 caps->media_codec.media_codec_information = &packet[pos]; 378 pos += caps->media_codec.media_codec_information_len; 379 break; 380 case AVDTP_MEDIA_TRANSPORT: 381 case AVDTP_REPORTING: 382 case AVDTP_DELAY_REPORTING: 383 pos += cap_len; 384 break; 385 default: 386 pos += cap_len; 387 rfa = 1; 388 break; 389 } 390 processed_cap_len = pos - processed_cap_len; 391 392 if (cap_len == processed_cap_len){ 393 if (!rfa) { 394 registered_service_categories = store_bit16(registered_service_categories, category, 1); 395 } 396 if (pos < size-2){ 397 //int old_pos = pos; 398 category = (avdtp_service_category_t)packet[pos++]; 399 cap_len = packet[pos++]; 400 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 401 //printf("category %d, pos %d + 2 + %d -> %d\n", category, old_pos, cap_len, pos + cap_len); 402 //printf_hexdump(packet+old_pos, size-old_pos); 403 } 404 } 405 } 406 return registered_service_categories; 407 } 408 409 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){ 410 if (signaling_packet->offset) return; 411 uint8_t pack_all_capabilities = 1; 412 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 413 int i; 414 415 signaling_packet->size = 0; 416 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 417 418 419 switch (identifier) { 420 case AVDTP_SI_GET_CAPABILITIES: 421 pack_all_capabilities = 0; 422 break; 423 case AVDTP_SI_GET_ALL_CAPABILITIES: 424 pack_all_capabilities = 1; 425 break; 426 case AVDTP_SI_SET_CONFIGURATION: 427 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 428 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 429 signaling_packet->message_type = AVDTP_CMD_MSG; 430 break; 431 case AVDTP_SI_RECONFIGURE: 432 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 433 signaling_packet->message_type = AVDTP_CMD_MSG; 434 break; 435 default: 436 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 437 break; 438 } 439 440 // printf("registered_service_categories: 0x%02x\n", registered_service_categories); 441 442 // printf("command before packing:\n"); 443 // printf_hexdump(signaling_packet->command, signaling_packet->size); 444 for (i = 1; i < 9; i++){ 445 int registered_category = get_bit16(registered_service_categories, i); 446 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION || identifier == AVDTP_SI_RECONFIGURE)){ 447 // TODO: introduce bitmap of mandatory categories 448 if (i == 1){ 449 registered_category = 1; 450 } 451 } 452 if (registered_category){ 453 // service category 454 // printf("pack service category: %d\n", i); 455 signaling_packet->command[signaling_packet->size++] = i; 456 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); 457 } 458 } 459 // printf("command after packing:\n"); 460 // printf_hexdump(signaling_packet->command, signaling_packet->size); 461 462 signaling_packet->signal_identifier = identifier; 463 signaling_packet->transaction_label = transaction_label; 464 } 465 466 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 467 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 468 // hack for test 469 // int mtu = 6; 470 int data_len = 0; 471 472 uint16_t offset = signaling_packet->offset; 473 uint16_t pos = 1; 474 // printf(" avdtp_signaling_create_fragment offset %d, packet type %d\n", signaling_packet->offset, signaling_packet->packet_type); 475 476 if (offset == 0){ 477 if (signaling_packet->size <= mtu - 2){ 478 // printf(" AVDTP_SINGLE_PACKET\n"); 479 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 480 out_buffer[pos++] = signaling_packet->signal_identifier; 481 data_len = signaling_packet->size; 482 } else { 483 signaling_packet->packet_type = AVDTP_START_PACKET; 484 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 485 out_buffer[pos++] = signaling_packet->signal_identifier; 486 data_len = mtu - 3; 487 signaling_packet->offset = data_len; 488 // printf(" AVDTP_START_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 489 } 490 } else { 491 int remaining_bytes = signaling_packet->size - offset; 492 if (remaining_bytes <= mtu - 1){ 493 //signaling_packet->fragmentation = 1; 494 signaling_packet->packet_type = AVDTP_END_PACKET; 495 data_len = remaining_bytes; 496 signaling_packet->offset = 0; 497 // printf(" AVDTP_END_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 498 } else{ 499 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 500 data_len = mtu - 1; 501 signaling_packet->offset += data_len; 502 // printf(" AVDTP_CONTINUE_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 503 } 504 } 505 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 506 memcpy(out_buffer+pos, signaling_packet->command + offset, data_len); 507 pos += data_len; 508 return pos; 509 } 510 511 512 void avdtp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t con_handle, bd_addr_t addr, uint8_t status){ 513 if (!callback) return; 514 uint8_t event[12]; 515 int pos = 0; 516 event[pos++] = HCI_EVENT_AVDTP_META; 517 event[pos++] = sizeof(event) - 2; 518 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 519 little_endian_store_16(event, pos, con_handle); 520 pos += 2; 521 reverse_bd_addr(addr,&event[pos]); 522 pos += 6; 523 event[pos++] = status; 524 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 525 } 526 527 void avdtp_streaming_emit_can_send_media_packet_now(btstack_packet_handler_t callback, uint16_t con_handle, uint8_t seid, uint16_t sequence_number){ 528 if (!callback) return; 529 uint8_t event[8]; 530 int pos = 0; 531 event[pos++] = HCI_EVENT_AVDTP_META; 532 event[pos++] = sizeof(event) - 2; 533 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 534 little_endian_store_16(event, pos, con_handle); 535 pos += 2; 536 event[pos++] = seid; 537 little_endian_store_16(event, pos, sequence_number); 538 pos += 2; 539 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 540 } 541 542 void avdtp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t con_handle, uint8_t status){ 543 if (!callback) return; 544 uint8_t event[6]; 545 int pos = 0; 546 event[pos++] = HCI_EVENT_AVDTP_META; 547 event[pos++] = sizeof(event) - 2; 548 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 549 little_endian_store_16(event, pos, con_handle); 550 pos += 2; 551 event[pos++] = status; 552 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 553 } 554 555 void avdtp_signaling_emit_sep(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_sep_t sep){ 556 if (!callback) return; 557 uint8_t event[9]; 558 int pos = 0; 559 event[pos++] = HCI_EVENT_AVDTP_META; 560 event[pos++] = sizeof(event) - 2; 561 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 562 little_endian_store_16(event, pos, con_handle); 563 pos += 2; 564 event[pos++] = sep.seid; 565 event[pos++] = sep.in_use; 566 event[pos++] = sep.media_type; 567 event[pos++] = sep.type; 568 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 569 } 570 571 void avdtp_signaling_emit_accept(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_signal_identifier_t identifier, uint8_t status){ 572 if (!callback) return; 573 uint8_t event[7]; 574 int pos = 0; 575 event[pos++] = HCI_EVENT_AVDTP_META; 576 event[pos++] = sizeof(event) - 2; 577 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 578 little_endian_store_16(event, pos, con_handle); 579 pos += 2; 580 event[pos++] = identifier; 581 event[pos++] = status; 582 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 583 } 584 585 void avdtp_signaling_emit_reject(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_signal_identifier_t identifier){ 586 if (!callback) return; 587 uint8_t event[6]; 588 int pos = 0; 589 event[pos++] = HCI_EVENT_AVDTP_META; 590 event[pos++] = sizeof(event) - 2; 591 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 592 little_endian_store_16(event, pos, con_handle); 593 pos += 2; 594 event[pos++] = identifier; 595 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 596 } 597 598 void avdtp_signaling_emit_general_reject(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_signal_identifier_t identifier){ 599 if (!callback) return; 600 uint8_t event[6]; 601 int pos = 0; 602 event[pos++] = HCI_EVENT_AVDTP_META; 603 event[pos++] = sizeof(event) - 2; 604 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 605 little_endian_store_16(event, pos, con_handle); 606 pos += 2; 607 event[pos++] = identifier; 608 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 609 } 610 611 void avdtp_signaling_emit_media_codec_sbc_capability(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 612 if (!callback) return; 613 uint8_t event[13]; 614 int pos = 0; 615 event[pos++] = HCI_EVENT_AVDTP_META; 616 event[pos++] = sizeof(event) - 2; 617 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 618 little_endian_store_16(event, pos, con_handle); 619 pos += 2; 620 event[pos++] = media_codec.media_type; 621 event[pos++] = media_codec.media_codec_information[0] >> 4; 622 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 623 event[pos++] = media_codec.media_codec_information[1] >> 4; 624 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 625 event[pos++] = media_codec.media_codec_information[1] & 0x03; 626 event[pos++] = media_codec.media_codec_information[2]; 627 event[pos++] = media_codec.media_codec_information[3]; 628 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 629 } 630 631 void avdtp_signaling_emit_media_codec_other_capability(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 632 if (!callback) return; 633 uint8_t event[109]; 634 int pos = 0; 635 event[pos++] = HCI_EVENT_AVDTP_META; 636 event[pos++] = sizeof(event) - 2; 637 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 638 little_endian_store_16(event, pos, con_handle); 639 pos += 2; 640 event[pos++] = media_codec.media_type; 641 little_endian_store_16(event, pos, media_codec.media_codec_type); 642 pos += 2; 643 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 644 pos += 2; 645 if (media_codec.media_codec_information_len < 100){ 646 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 647 } else { 648 memcpy(event+pos, media_codec.media_codec_information, 100); 649 } 650 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 651 } 652 653 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){ 654 if (!callback) return; 655 uint8_t event[14+2]; 656 int pos = 0; 657 event[pos++] = HCI_EVENT_AVDTP_META; 658 event[pos++] = sizeof(event) - 2; 659 660 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 661 little_endian_store_16(event, pos, con_handle); 662 pos += 2; 663 event[pos++] = reconfigure; 664 665 uint8_t num_channels = 0; 666 uint16_t sampling_frequency = 0; 667 uint8_t subbands = 0; 668 uint8_t block_length = 0; 669 670 uint8_t sampling_frequency_bitmap = media_codec.media_codec_information[0] >> 4; 671 uint8_t channel_mode_bitmap = media_codec.media_codec_information[0] & 0x0F; 672 uint8_t block_length_bitmap = media_codec.media_codec_information[1] >> 4; 673 uint8_t subbands_bitmap = (media_codec.media_codec_information[1] & 0x0F) >> 2; 674 675 if (channel_mode_bitmap & AVDTP_SBC_MONO){ 676 num_channels = 1; 677 } 678 if ( (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 679 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 680 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL) ){ 681 num_channels = 2; 682 } 683 684 if (sampling_frequency_bitmap & AVDTP_SBC_16000){ 685 sampling_frequency = 16000; 686 } 687 if (sampling_frequency_bitmap & AVDTP_SBC_32000){ 688 sampling_frequency = 32000; 689 } 690 if (sampling_frequency_bitmap & AVDTP_SBC_44100){ 691 sampling_frequency = 44100; 692 } 693 if (sampling_frequency_bitmap & AVDTP_SBC_48000){ 694 sampling_frequency = 48000; 695 } 696 697 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 698 subbands = 4; 699 } 700 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 701 subbands = 8; 702 } 703 704 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 705 block_length = 4; 706 } 707 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 708 block_length = 8; 709 } 710 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 711 block_length = 12; 712 } 713 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 714 block_length = 16; 715 } 716 717 event[pos++] = media_codec.media_type; 718 little_endian_store_16(event, pos, sampling_frequency); 719 pos += 2; 720 721 event[pos++] = channel_mode_bitmap; 722 event[pos++] = num_channels; 723 event[pos++] = block_length; 724 event[pos++] = subbands; 725 event[pos++] = media_codec.media_codec_information[1] & 0x03; 726 event[pos++] = media_codec.media_codec_information[2]; 727 event[pos++] = media_codec.media_codec_information[3]; 728 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 729 } 730 731 void avdtp_signaling_emit_media_codec_sbc_configuration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 732 if (!callback) return; 733 avdtp_signaling_emit_media_codec_sbc(callback, con_handle, media_codec, 0); 734 } 735 736 void avdtp_signaling_emit_media_codec_sbc_reconfiguration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 737 if (!callback) return; 738 avdtp_signaling_emit_media_codec_sbc(callback, con_handle, media_codec, 1); 739 } 740 741 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){ 742 uint8_t event[110]; 743 int pos = 0; 744 event[pos++] = HCI_EVENT_AVDTP_META; 745 event[pos++] = sizeof(event) - 2; 746 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 747 little_endian_store_16(event, pos, con_handle); 748 pos += 2; 749 750 event[pos++] = reconfigure; 751 752 event[pos++] = media_codec.media_type; 753 little_endian_store_16(event, pos, media_codec.media_codec_type); 754 pos += 2; 755 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 756 pos += 2; 757 758 if (media_codec.media_codec_information_len < 100){ 759 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 760 } else { 761 memcpy(event+pos, media_codec.media_codec_information, 100); 762 } 763 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 764 } 765 766 void avdtp_signaling_emit_media_codec_other_configuration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 767 if (!callback) return; 768 avdtp_signaling_emit_media_codec_other(callback, con_handle, media_codec, 0); 769 } 770 771 void avdtp_signaling_emit_media_codec_other_reconfiguration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 772 if (!callback) return; 773 avdtp_signaling_emit_media_codec_other(callback, con_handle, media_codec, 1); 774 } 775 776 777 void avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 778 connection->wait_to_send_acceptor = 1; 779 l2cap_request_can_send_now_event(l2cap_cid); 780 } 781 void avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 782 connection->wait_to_send_initiator = 1; 783 l2cap_request_can_send_now_event(l2cap_cid); 784 } 785 void avdtp_request_can_send_now_self(avdtp_connection_t * connection, uint16_t l2cap_cid){ 786 connection->wait_to_send_self = 1; 787 l2cap_request_can_send_now_event(l2cap_cid); 788 } 789 790 uint8_t avdtp_get_index_of_remote_stream_endpoint_with_seid(avdtp_stream_endpoint_t * stream_endpoint, uint16_t seid){ 791 if (!stream_endpoint->connection) return 0xFF; 792 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == seid){ 793 return stream_endpoint->remote_sep_index; 794 } 795 int i; 796 for (i=0; i < stream_endpoint->connection->remote_seps_num; i++){ 797 if (stream_endpoint->connection->remote_seps[i].seid == seid){ 798 return i; 799 } 800 } 801 return 0xFF; 802 } 803 804 uint8_t avdtp_find_remote_sep(avdtp_connection_t * connection, uint8_t remote_seid){ 805 if (!connection) return 0xFF; 806 int i; 807 for (i = 0; i < connection->remote_seps_num; i++){ 808 if (connection->remote_seps[i].seid == remote_seid){ 809 return i; 810 } 811 } 812 return 0xFF; 813 } 814