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->remote_seps_num = 0; 63 stream_endpoint->sep.in_use = 0; 64 memset(stream_endpoint->remote_seps, 0, sizeof(stream_endpoint->remote_seps)); 65 stream_endpoint->remote_sep_index = 0; 66 } 67 68 avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_seid(uint16_t seid, avdtp_context_t * context){ 69 btstack_linked_list_iterator_t it; 70 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 71 while (btstack_linked_list_iterator_has_next(&it)){ 72 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 73 if (stream_endpoint->sep.seid == seid){ 74 return stream_endpoint; 75 } 76 } 77 return NULL; 78 } 79 80 avdtp_connection_t * avdtp_connection_for_bd_addr(bd_addr_t addr, avdtp_context_t * context){ 81 btstack_linked_list_iterator_t it; 82 btstack_linked_list_iterator_init(&it, &context->connections); 83 while (btstack_linked_list_iterator_has_next(&it)){ 84 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 85 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 86 return connection; 87 } 88 return NULL; 89 } 90 91 avdtp_connection_t * avdtp_connection_for_con_handle(hci_con_handle_t con_handle, avdtp_context_t * context){ 92 btstack_linked_list_iterator_t it; 93 btstack_linked_list_iterator_init(&it, &context->connections); 94 while (btstack_linked_list_iterator_has_next(&it)){ 95 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 96 if (connection->con_handle != con_handle) continue; 97 return connection; 98 } 99 return NULL; 100 } 101 102 avdtp_connection_t * avdtp_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid, avdtp_context_t * context){ 103 btstack_linked_list_iterator_t it; 104 btstack_linked_list_iterator_init(&it, &context->connections); 105 while (btstack_linked_list_iterator_has_next(&it)){ 106 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 107 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 108 return connection; 109 } 110 return NULL; 111 } 112 113 avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_l2cap_cid(uint16_t l2cap_cid, avdtp_context_t * context){ 114 btstack_linked_list_iterator_t it; 115 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 116 while (btstack_linked_list_iterator_has_next(&it)){ 117 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 118 if (stream_endpoint->l2cap_media_cid == l2cap_cid){ 119 return stream_endpoint; 120 } 121 if (stream_endpoint->l2cap_reporting_cid == l2cap_cid){ 122 return stream_endpoint; 123 } 124 if (stream_endpoint->l2cap_recovery_cid == l2cap_cid){ 125 return stream_endpoint; 126 } 127 } 128 return NULL; 129 } 130 131 avdtp_stream_endpoint_t * avdtp_stream_endpoint_with_seid(uint8_t seid, avdtp_context_t * context){ 132 btstack_linked_list_iterator_t it; 133 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 134 while (btstack_linked_list_iterator_has_next(&it)){ 135 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 136 if (stream_endpoint->sep.seid == seid){ 137 return stream_endpoint; 138 } 139 } 140 return NULL; 141 } 142 143 avdtp_stream_endpoint_t * avdtp_stream_endpoint_associated_with_acp_seid(uint16_t acp_seid, avdtp_context_t * context){ 144 btstack_linked_list_iterator_t it; 145 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 146 while (btstack_linked_list_iterator_has_next(&it)){ 147 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 148 if (stream_endpoint->remote_sep_index >= 0 && stream_endpoint->remote_sep_index < MAX_NUM_SEPS){ 149 if (stream_endpoint->remote_seps[stream_endpoint->remote_sep_index].seid == acp_seid){ 150 return stream_endpoint; 151 } 152 } 153 } 154 return NULL; 155 } 156 157 int get_bit16(uint16_t bitmap, int position){ 158 return (bitmap >> position) & 1; 159 } 160 161 uint8_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 162 if (value){ 163 bitmap |= 1 << position; 164 } else { 165 bitmap &= ~ (1 << position); 166 } 167 return bitmap; 168 } 169 170 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 171 int pos = 0; 172 if (size < 2) return pos; 173 signaling_header->transaction_label = packet[pos] >> 4; 174 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 175 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 176 pos++; 177 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 178 switch (signaling_header->packet_type){ 179 case AVDTP_SINGLE_PACKET: 180 signaling_header->num_packets = 0; 181 signaling_header->offset = 0; 182 signaling_header->size = 0; 183 break; 184 case AVDTP_END_PACKET: 185 signaling_header->num_packets = 0; 186 break; 187 case AVDTP_START_PACKET: 188 signaling_header->num_packets = packet[pos++]; 189 signaling_header->size = 0; 190 signaling_header->offset = 0; 191 break; 192 case AVDTP_CONTINUE_PACKET: 193 if (signaling_header->num_packets <= 0) { 194 printf(" ERROR: wrong num fragmented packets\n"); 195 break; 196 } 197 signaling_header->num_packets--; 198 break; 199 } 200 signaling_header->signal_identifier = packet[pos++] & 0x3f; 201 return pos; 202 } 203 204 int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){ 205 UNUSED(size); 206 207 int i; 208 // pos = 0 reserved for length 209 int pos = 1; 210 switch(category){ 211 case AVDTP_MEDIA_TRANSPORT: 212 case AVDTP_REPORTING: 213 break; 214 case AVDTP_DELAY_REPORTING: 215 if (!pack_all_capabilities) break; 216 break; 217 case AVDTP_RECOVERY: 218 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 219 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 220 buffer[pos++] = caps.recovery.maximum_number_media_packets; 221 break; 222 case AVDTP_CONTENT_PROTECTION: 223 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 224 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 225 pos += 2; 226 memcpy(buffer+pos, caps.content_protection.cp_type_value, caps.content_protection.cp_type_value_len); 227 break; 228 case AVDTP_HEADER_COMPRESSION: 229 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 230 break; 231 case AVDTP_MULTIPLEXING: 232 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 233 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 234 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 235 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 236 // media, reporting. recovery 237 } 238 break; 239 case AVDTP_MEDIA_CODEC: 240 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 241 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 242 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 243 buffer[pos++] = caps.media_codec.media_codec_information[i]; 244 } 245 break; 246 default: 247 break; 248 } 249 buffer[0] = pos - 1; // length 250 return pos; 251 } 252 253 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_service_category_t category, uint8_t cap_len){ 254 connection->error_code = 0; 255 256 if (category == AVDTP_SERVICE_CATEGORY_INVALID_0 || 257 (category == AVDTP_SERVICE_CATEGORY_INVALID_FF && connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE)){ 258 printf(" ERROR: BAD SERVICE CATEGORY %d\n", category); 259 connection->reject_service_category = category; 260 connection->error_code = BAD_SERV_CATEGORY; 261 return 1; 262 } 263 264 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 265 if (category != AVDTP_CONTENT_PROTECTION && category != AVDTP_MEDIA_CODEC){ 266 printf(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 267 connection->reject_service_category = category; 268 connection->error_code = INVALID_CAPABILITIES; 269 return 1; 270 } 271 } 272 273 switch(category){ 274 case AVDTP_MEDIA_TRANSPORT: 275 if (cap_len != 0){ 276 printf(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 277 connection->reject_service_category = category; 278 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 279 return 1; 280 } 281 break; 282 case AVDTP_REPORTING: 283 case AVDTP_DELAY_REPORTING: 284 if (cap_len != 0){ 285 printf(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 286 connection->reject_service_category = category; 287 connection->error_code = BAD_LENGTH; 288 return 1; 289 } 290 break; 291 case AVDTP_RECOVERY: 292 if (cap_len < 3){ 293 printf(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 294 connection->reject_service_category = category; 295 connection->error_code = BAD_RECOVERY_FORMAT; 296 return 1; 297 } 298 break; 299 case AVDTP_CONTENT_PROTECTION: 300 if (cap_len < 2){ 301 printf(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 302 connection->reject_service_category = category; 303 connection->error_code = BAD_CP_FORMAT; 304 return 1; 305 } 306 break; 307 case AVDTP_HEADER_COMPRESSION: 308 break; 309 case AVDTP_MULTIPLEXING: 310 break; 311 case AVDTP_MEDIA_CODEC: 312 break; 313 default: 314 break; 315 } 316 return 0; 317 } 318 319 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 320 if (size == 0) return 0; 321 322 uint16_t registered_service_categories = 0; 323 int pos = 0; 324 int i; 325 avdtp_service_category_t category = (avdtp_service_category_t)packet[pos++]; 326 uint8_t cap_len = packet[pos++]; 327 328 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 329 int processed_cap_len = 0; 330 int rfa = 0; 331 //printf(" size %d, cat size %d\n", size, cap_len); 332 333 while (pos < size){ 334 if (cap_len > size - pos){ 335 connection->reject_service_category = category; 336 connection->error_code = BAD_LENGTH; 337 return 0; 338 } 339 rfa = 0; 340 processed_cap_len = pos; 341 switch(category){ 342 case AVDTP_RECOVERY: 343 caps->recovery.recovery_type = packet[pos++]; 344 caps->recovery.maximum_recovery_window_size = packet[pos++]; 345 caps->recovery.maximum_number_media_packets = packet[pos++]; 346 break; 347 case AVDTP_CONTENT_PROTECTION: 348 caps->content_protection.cp_type = big_endian_read_16(packet, pos); 349 pos+=2; 350 351 caps->content_protection.cp_type_value_len = cap_len - 2; 352 pos += caps->content_protection.cp_type_value_len; 353 354 // connection->reject_service_category = category; 355 // connection->error_code = UNSUPPORTED_CONFIGURATION; 356 // support for content protection goes here 357 break; 358 359 case AVDTP_HEADER_COMPRESSION: 360 caps->header_compression.back_ch = packet[pos] >> 7; 361 caps->header_compression.media = packet[pos] >> 6; 362 caps->header_compression.recovery = packet[pos] >> 5; 363 pos++; 364 break; 365 case AVDTP_MULTIPLEXING: 366 caps->multiplexing_mode.fragmentation = packet[pos++] >> 7; 367 // read [tsid, tcid] for media, reporting. recovery respectively 368 caps->multiplexing_mode.transport_identifiers_num = 3; 369 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 370 caps->multiplexing_mode.transport_session_identifiers[i] = packet[pos++] >> 7; 371 caps->multiplexing_mode.tcid[i] = packet[pos++] >> 7; 372 } 373 break; 374 case AVDTP_MEDIA_CODEC: 375 caps->media_codec.media_type = packet[pos++] >> 4; 376 caps->media_codec.media_codec_type = packet[pos++]; 377 caps->media_codec.media_codec_information_len = cap_len - 2; 378 caps->media_codec.media_codec_information = &packet[pos]; 379 pos += caps->media_codec.media_codec_information_len; 380 break; 381 case AVDTP_MEDIA_TRANSPORT: 382 case AVDTP_REPORTING: 383 case AVDTP_DELAY_REPORTING: 384 pos += cap_len; 385 break; 386 default: 387 pos += cap_len; 388 rfa = 1; 389 break; 390 } 391 processed_cap_len = pos - processed_cap_len; 392 393 if (cap_len == processed_cap_len){ 394 if (!rfa) { 395 registered_service_categories = store_bit16(registered_service_categories, category, 1); 396 } 397 if (pos < size-2){ 398 //int old_pos = pos; 399 category = (avdtp_service_category_t)packet[pos++]; 400 cap_len = packet[pos++]; 401 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 402 //printf("category %d, pos %d + 2 + %d -> %d\n", category, old_pos, cap_len, pos + cap_len); 403 //printf_hexdump(packet+old_pos, size-old_pos); 404 } 405 } 406 } 407 return registered_service_categories; 408 } 409 410 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){ 411 if (signaling_packet->offset) return; 412 uint8_t pack_all_capabilities = 1; 413 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 414 int i; 415 416 signaling_packet->size = 0; 417 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 418 419 420 switch (identifier) { 421 case AVDTP_SI_GET_CAPABILITIES: 422 pack_all_capabilities = 0; 423 break; 424 case AVDTP_SI_GET_ALL_CAPABILITIES: 425 pack_all_capabilities = 1; 426 break; 427 case AVDTP_SI_SET_CONFIGURATION: 428 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 429 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 430 signaling_packet->message_type = AVDTP_CMD_MSG; 431 break; 432 case AVDTP_SI_RECONFIGURE: 433 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 434 signaling_packet->message_type = AVDTP_CMD_MSG; 435 break; 436 default: 437 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 438 break; 439 } 440 441 // printf("registered_service_categories: 0x%02x\n", registered_service_categories); 442 443 // printf("command before packing:\n"); 444 // printf_hexdump(signaling_packet->command, signaling_packet->size); 445 for (i = 1; i < 9; i++){ 446 int registered_category = get_bit16(registered_service_categories, i); 447 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION || identifier == AVDTP_SI_RECONFIGURE)){ 448 // TODO: introduce bitmap of mandatory categories 449 if (i == 1){ 450 registered_category = 1; 451 } 452 } 453 if (registered_category){ 454 // service category 455 // printf("pack service category: %d\n", i); 456 signaling_packet->command[signaling_packet->size++] = i; 457 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); 458 } 459 } 460 // printf("command after packing:\n"); 461 // printf_hexdump(signaling_packet->command, signaling_packet->size); 462 463 signaling_packet->signal_identifier = identifier; 464 signaling_packet->transaction_label = transaction_label; 465 } 466 467 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 468 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 469 // hack for test 470 // int mtu = 6; 471 int data_len = 0; 472 473 uint16_t offset = signaling_packet->offset; 474 uint16_t pos = 1; 475 // printf(" avdtp_signaling_create_fragment offset %d, packet type %d\n", signaling_packet->offset, signaling_packet->packet_type); 476 477 if (offset == 0){ 478 if (signaling_packet->size <= mtu - 2){ 479 // printf(" AVDTP_SINGLE_PACKET\n"); 480 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 481 out_buffer[pos++] = signaling_packet->signal_identifier; 482 data_len = signaling_packet->size; 483 } else { 484 signaling_packet->packet_type = AVDTP_START_PACKET; 485 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 486 out_buffer[pos++] = signaling_packet->signal_identifier; 487 data_len = mtu - 3; 488 signaling_packet->offset = data_len; 489 // printf(" AVDTP_START_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 490 } 491 } else { 492 int remaining_bytes = signaling_packet->size - offset; 493 if (remaining_bytes <= mtu - 1){ 494 //signaling_packet->fragmentation = 1; 495 signaling_packet->packet_type = AVDTP_END_PACKET; 496 data_len = remaining_bytes; 497 signaling_packet->offset = 0; 498 // printf(" AVDTP_END_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 499 } else{ 500 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 501 data_len = mtu - 1; 502 signaling_packet->offset += data_len; 503 // printf(" AVDTP_CONTINUE_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 504 } 505 } 506 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 507 memcpy(out_buffer+pos, signaling_packet->command + offset, data_len); 508 pos += data_len; 509 return pos; 510 } 511 512 513 void avdtp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t con_handle, bd_addr_t addr, uint8_t status){ 514 if (!callback) return; 515 uint8_t event[12]; 516 int pos = 0; 517 event[pos++] = HCI_EVENT_AVDTP_META; 518 event[pos++] = sizeof(event) - 2; 519 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 520 little_endian_store_16(event, pos, con_handle); 521 pos += 2; 522 reverse_bd_addr(addr,&event[pos]); 523 pos += 6; 524 event[pos++] = status; 525 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 526 } 527 528 void avdtp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t con_handle, uint8_t status){ 529 if (!callback) return; 530 uint8_t event[6]; 531 int pos = 0; 532 event[pos++] = HCI_EVENT_AVDTP_META; 533 event[pos++] = sizeof(event) - 2; 534 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 535 little_endian_store_16(event, pos, con_handle); 536 pos += 2; 537 event[pos++] = status; 538 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 539 } 540 541 void avdtp_signaling_emit_sep(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_sep_t sep){ 542 if (!callback) return; 543 uint8_t event[9]; 544 int pos = 0; 545 event[pos++] = HCI_EVENT_AVDTP_META; 546 event[pos++] = sizeof(event) - 2; 547 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 548 little_endian_store_16(event, pos, con_handle); 549 pos += 2; 550 event[pos++] = sep.seid; 551 event[pos++] = sep.in_use; 552 event[pos++] = sep.media_type; 553 event[pos++] = sep.type; 554 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 555 } 556 557 void avdtp_signaling_emit_accept(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_signal_identifier_t identifier, uint8_t status){ 558 if (!callback) return; 559 uint8_t event[7]; 560 int pos = 0; 561 event[pos++] = HCI_EVENT_AVDTP_META; 562 event[pos++] = sizeof(event) - 2; 563 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 564 little_endian_store_16(event, pos, con_handle); 565 pos += 2; 566 event[pos++] = identifier; 567 event[pos++] = status; 568 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 569 } 570 571 void avdtp_signaling_emit_reject(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_signal_identifier_t identifier){ 572 if (!callback) return; 573 uint8_t event[6]; 574 int pos = 0; 575 event[pos++] = HCI_EVENT_AVDTP_META; 576 event[pos++] = sizeof(event) - 2; 577 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 578 little_endian_store_16(event, pos, con_handle); 579 pos += 2; 580 event[pos++] = identifier; 581 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 582 } 583 584 void avdtp_signaling_emit_general_reject(btstack_packet_handler_t callback, uint16_t con_handle, avdtp_signal_identifier_t identifier){ 585 if (!callback) return; 586 uint8_t event[6]; 587 int pos = 0; 588 event[pos++] = HCI_EVENT_AVDTP_META; 589 event[pos++] = sizeof(event) - 2; 590 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 591 little_endian_store_16(event, pos, con_handle); 592 pos += 2; 593 event[pos++] = identifier; 594 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 595 } 596 597 void avdtp_signaling_emit_media_codec_sbc_capability(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 598 if (!callback) return; 599 uint8_t event[13]; 600 int pos = 0; 601 event[pos++] = HCI_EVENT_AVDTP_META; 602 event[pos++] = sizeof(event) - 2; 603 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 604 little_endian_store_16(event, pos, con_handle); 605 pos += 2; 606 event[pos++] = media_codec.media_type; 607 event[pos++] = media_codec.media_codec_information[0] >> 4; 608 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 609 event[pos++] = media_codec.media_codec_information[1] >> 4; 610 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 611 event[pos++] = media_codec.media_codec_information[1] & 0x03; 612 event[pos++] = media_codec.media_codec_information[2]; 613 event[pos++] = media_codec.media_codec_information[3]; 614 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 615 } 616 617 void avdtp_signaling_emit_media_codec_other_capability(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 618 if (!callback) return; 619 uint8_t event[109]; 620 int pos = 0; 621 event[pos++] = HCI_EVENT_AVDTP_META; 622 event[pos++] = sizeof(event) - 2; 623 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 624 little_endian_store_16(event, pos, con_handle); 625 pos += 2; 626 event[pos++] = media_codec.media_type; 627 little_endian_store_16(event, pos, media_codec.media_codec_type); 628 pos += 2; 629 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 630 pos += 2; 631 if (media_codec.media_codec_information_len < 100){ 632 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 633 } else { 634 memcpy(event+pos, media_codec.media_codec_information, 100); 635 } 636 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 637 } 638 639 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){ 640 if (!callback) return; 641 uint8_t event[14+2]; 642 int pos = 0; 643 event[pos++] = HCI_EVENT_AVDTP_META; 644 event[pos++] = sizeof(event) - 2; 645 646 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 647 little_endian_store_16(event, pos, con_handle); 648 pos += 2; 649 event[pos++] = reconfigure; 650 651 uint8_t num_channels = 0; 652 uint16_t sampling_frequency = 0; 653 uint8_t subbands = 0; 654 uint8_t block_length = 0; 655 656 uint8_t sampling_frequency_bitmap = media_codec.media_codec_information[0] >> 4; 657 uint8_t channel_mode_bitmap = media_codec.media_codec_information[0] & 0x0F; 658 uint8_t block_length_bitmap = media_codec.media_codec_information[1] >> 4; 659 uint8_t subbands_bitmap = (media_codec.media_codec_information[1] & 0x0F) >> 2; 660 661 if (channel_mode_bitmap & AVDTP_SBC_MONO){ 662 num_channels = 1; 663 } 664 if ( (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 665 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 666 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL) ){ 667 num_channels = 2; 668 } 669 670 if (sampling_frequency_bitmap & AVDTP_SBC_16000){ 671 sampling_frequency = 16000; 672 } 673 if (sampling_frequency_bitmap & AVDTP_SBC_32000){ 674 sampling_frequency = 32000; 675 } 676 if (sampling_frequency_bitmap & AVDTP_SBC_44100){ 677 sampling_frequency = 44100; 678 } 679 if (sampling_frequency_bitmap & AVDTP_SBC_48000){ 680 sampling_frequency = 48000; 681 } 682 683 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 684 subbands = 4; 685 } 686 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 687 subbands = 8; 688 } 689 690 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 691 block_length = 4; 692 } 693 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 694 block_length = 8; 695 } 696 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 697 block_length = 12; 698 } 699 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 700 block_length = 16; 701 } 702 703 event[pos++] = media_codec.media_type; 704 little_endian_store_16(event, pos, sampling_frequency); 705 pos += 2; 706 707 event[pos++] = channel_mode_bitmap; 708 event[pos++] = num_channels; 709 event[pos++] = block_length; 710 event[pos++] = subbands; 711 event[pos++] = media_codec.media_codec_information[1] & 0x03; 712 event[pos++] = media_codec.media_codec_information[2]; 713 event[pos++] = media_codec.media_codec_information[3]; 714 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 715 } 716 717 void avdtp_signaling_emit_media_codec_sbc_configuration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 718 if (!callback) return; 719 avdtp_signaling_emit_media_codec_sbc(callback, con_handle, media_codec, 0); 720 } 721 722 void avdtp_signaling_emit_media_codec_sbc_reconfiguration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 723 if (!callback) return; 724 avdtp_signaling_emit_media_codec_sbc(callback, con_handle, media_codec, 1); 725 } 726 727 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){ 728 uint8_t event[110]; 729 int pos = 0; 730 event[pos++] = HCI_EVENT_AVDTP_META; 731 event[pos++] = sizeof(event) - 2; 732 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 733 little_endian_store_16(event, pos, con_handle); 734 pos += 2; 735 736 event[pos++] = reconfigure; 737 738 event[pos++] = media_codec.media_type; 739 little_endian_store_16(event, pos, media_codec.media_codec_type); 740 pos += 2; 741 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 742 pos += 2; 743 744 if (media_codec.media_codec_information_len < 100){ 745 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 746 } else { 747 memcpy(event+pos, media_codec.media_codec_information, 100); 748 } 749 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 750 } 751 752 void avdtp_signaling_emit_media_codec_other_configuration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 753 if (!callback) return; 754 avdtp_signaling_emit_media_codec_other(callback, con_handle, media_codec, 0); 755 } 756 757 void avdtp_signaling_emit_media_codec_other_reconfiguration(btstack_packet_handler_t callback, uint16_t con_handle, adtvp_media_codec_capabilities_t media_codec){ 758 if (!callback) return; 759 avdtp_signaling_emit_media_codec_other(callback, con_handle, media_codec, 1); 760 } 761 762 763 void avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 764 connection->wait_to_send_acceptor = 1; 765 l2cap_request_can_send_now_event(l2cap_cid); 766 } 767 void avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 768 connection->wait_to_send_initiator = 1; 769 l2cap_request_can_send_now_event(l2cap_cid); 770 } 771 void avdtp_request_can_send_now_self(avdtp_connection_t * connection, uint16_t l2cap_cid){ 772 connection->wait_to_send_self = 1; 773 l2cap_request_can_send_now_event(l2cap_cid); 774 } 775 776 uint8_t avdtp_get_index_of_remote_stream_endpoint_with_seid(avdtp_stream_endpoint_t * stream_endpoint, uint16_t seid){ 777 if (stream_endpoint->remote_seps[stream_endpoint->remote_sep_index].seid == seid){ 778 return stream_endpoint->remote_sep_index; 779 } 780 int i; 781 for (i=0; i < stream_endpoint->remote_seps_num; i++){ 782 if (stream_endpoint->remote_seps[i].seid == seid){ 783 return i; 784 } 785 } 786 return 0xFF; 787 } 788