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_l2cap_signaling_cid(uint16_t l2cap_cid, 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->l2cap_signaling_cid != l2cap_cid) continue; 95 return connection; 96 } 97 return NULL; 98 } 99 100 avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_l2cap_cid(uint16_t l2cap_cid, avdtp_context_t * context){ 101 btstack_linked_list_iterator_t it; 102 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 103 while (btstack_linked_list_iterator_has_next(&it)){ 104 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 105 if (stream_endpoint->l2cap_media_cid == l2cap_cid){ 106 return stream_endpoint; 107 } 108 if (stream_endpoint->l2cap_reporting_cid == l2cap_cid){ 109 return stream_endpoint; 110 } 111 if (stream_endpoint->l2cap_recovery_cid == l2cap_cid){ 112 return stream_endpoint; 113 } 114 } 115 return NULL; 116 } 117 118 avdtp_stream_endpoint_t * avdtp_stream_endpoint_with_seid(uint8_t seid, avdtp_context_t * context){ 119 btstack_linked_list_iterator_t it; 120 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 121 while (btstack_linked_list_iterator_has_next(&it)){ 122 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 123 if (stream_endpoint->sep.seid == seid){ 124 return stream_endpoint; 125 } 126 } 127 return NULL; 128 } 129 130 avdtp_stream_endpoint_t * avdtp_stream_endpoint_associated_with_acp_seid(uint16_t acp_seid, avdtp_context_t * context){ 131 btstack_linked_list_iterator_t it; 132 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 133 while (btstack_linked_list_iterator_has_next(&it)){ 134 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 135 if (stream_endpoint->remote_sep_index >= 0 && stream_endpoint->remote_sep_index < MAX_NUM_SEPS){ 136 if (!stream_endpoint->connection) continue; 137 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == acp_seid){ 138 return stream_endpoint; 139 } 140 } 141 } 142 return NULL; 143 } 144 145 int get_bit16(uint16_t bitmap, int position){ 146 return (bitmap >> position) & 1; 147 } 148 149 uint8_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 150 if (value){ 151 bitmap |= 1 << position; 152 } else { 153 bitmap &= ~ (1 << position); 154 } 155 return bitmap; 156 } 157 158 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 159 int pos = 0; 160 if (size < 2) return pos; 161 signaling_header->transaction_label = packet[pos] >> 4; 162 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 163 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 164 pos++; 165 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 166 switch (signaling_header->packet_type){ 167 case AVDTP_SINGLE_PACKET: 168 signaling_header->num_packets = 0; 169 signaling_header->offset = 0; 170 signaling_header->size = 0; 171 break; 172 case AVDTP_END_PACKET: 173 signaling_header->num_packets = 0; 174 break; 175 case AVDTP_START_PACKET: 176 signaling_header->num_packets = packet[pos++]; 177 signaling_header->size = 0; 178 signaling_header->offset = 0; 179 break; 180 case AVDTP_CONTINUE_PACKET: 181 if (signaling_header->num_packets <= 0) { 182 printf(" ERROR: wrong num fragmented packets\n"); 183 break; 184 } 185 signaling_header->num_packets--; 186 break; 187 } 188 signaling_header->signal_identifier = packet[pos++] & 0x3f; 189 return pos; 190 } 191 192 int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){ 193 UNUSED(size); 194 195 int i; 196 // pos = 0 reserved for length 197 int pos = 1; 198 switch(category){ 199 case AVDTP_MEDIA_TRANSPORT: 200 case AVDTP_REPORTING: 201 break; 202 case AVDTP_DELAY_REPORTING: 203 if (!pack_all_capabilities) break; 204 break; 205 case AVDTP_RECOVERY: 206 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 207 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 208 buffer[pos++] = caps.recovery.maximum_number_media_packets; 209 break; 210 case AVDTP_CONTENT_PROTECTION: 211 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 212 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 213 pos += 2; 214 memcpy(buffer+pos, caps.content_protection.cp_type_value, caps.content_protection.cp_type_value_len); 215 break; 216 case AVDTP_HEADER_COMPRESSION: 217 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 218 break; 219 case AVDTP_MULTIPLEXING: 220 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 221 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 222 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 223 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 224 // media, reporting. recovery 225 } 226 break; 227 case AVDTP_MEDIA_CODEC: 228 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 229 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 230 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 231 buffer[pos++] = caps.media_codec.media_codec_information[i]; 232 } 233 break; 234 default: 235 break; 236 } 237 buffer[0] = pos - 1; // length 238 return pos; 239 } 240 241 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_service_category_t category, uint8_t cap_len){ 242 connection->error_code = 0; 243 244 if (category == AVDTP_SERVICE_CATEGORY_INVALID_0 || 245 (category == AVDTP_SERVICE_CATEGORY_INVALID_FF && connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE)){ 246 printf(" ERROR: BAD SERVICE CATEGORY %d\n", category); 247 connection->reject_service_category = category; 248 connection->error_code = BAD_SERV_CATEGORY; 249 return 1; 250 } 251 252 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 253 if (category != AVDTP_CONTENT_PROTECTION && category != AVDTP_MEDIA_CODEC){ 254 printf(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 255 connection->reject_service_category = category; 256 connection->error_code = INVALID_CAPABILITIES; 257 return 1; 258 } 259 } 260 261 switch(category){ 262 case AVDTP_MEDIA_TRANSPORT: 263 if (cap_len != 0){ 264 printf(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 265 connection->reject_service_category = category; 266 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 267 return 1; 268 } 269 break; 270 case AVDTP_REPORTING: 271 case AVDTP_DELAY_REPORTING: 272 if (cap_len != 0){ 273 printf(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 274 connection->reject_service_category = category; 275 connection->error_code = BAD_LENGTH; 276 return 1; 277 } 278 break; 279 case AVDTP_RECOVERY: 280 if (cap_len < 3){ 281 printf(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 282 connection->reject_service_category = category; 283 connection->error_code = BAD_RECOVERY_FORMAT; 284 return 1; 285 } 286 break; 287 case AVDTP_CONTENT_PROTECTION: 288 if (cap_len < 2){ 289 printf(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 290 connection->reject_service_category = category; 291 connection->error_code = BAD_CP_FORMAT; 292 return 1; 293 } 294 break; 295 case AVDTP_HEADER_COMPRESSION: 296 break; 297 case AVDTP_MULTIPLEXING: 298 break; 299 case AVDTP_MEDIA_CODEC: 300 break; 301 default: 302 break; 303 } 304 return 0; 305 } 306 307 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 308 if (size == 0) return 0; 309 310 uint16_t registered_service_categories = 0; 311 int pos = 0; 312 int i; 313 avdtp_service_category_t category = (avdtp_service_category_t)packet[pos++]; 314 uint8_t cap_len = packet[pos++]; 315 316 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 317 int processed_cap_len = 0; 318 int rfa = 0; 319 //printf(" size %d, cat size %d\n", size, cap_len); 320 321 while (pos < size){ 322 if (cap_len > size - pos){ 323 connection->reject_service_category = category; 324 connection->error_code = BAD_LENGTH; 325 return 0; 326 } 327 rfa = 0; 328 processed_cap_len = pos; 329 switch(category){ 330 case AVDTP_RECOVERY: 331 caps->recovery.recovery_type = packet[pos++]; 332 caps->recovery.maximum_recovery_window_size = packet[pos++]; 333 caps->recovery.maximum_number_media_packets = packet[pos++]; 334 break; 335 case AVDTP_CONTENT_PROTECTION: 336 caps->content_protection.cp_type = big_endian_read_16(packet, pos); 337 pos+=2; 338 339 caps->content_protection.cp_type_value_len = cap_len - 2; 340 pos += caps->content_protection.cp_type_value_len; 341 342 // connection->reject_service_category = category; 343 // connection->error_code = UNSUPPORTED_CONFIGURATION; 344 // support for content protection goes here 345 break; 346 347 case AVDTP_HEADER_COMPRESSION: 348 caps->header_compression.back_ch = packet[pos] >> 7; 349 caps->header_compression.media = packet[pos] >> 6; 350 caps->header_compression.recovery = packet[pos] >> 5; 351 pos++; 352 break; 353 case AVDTP_MULTIPLEXING: 354 caps->multiplexing_mode.fragmentation = packet[pos++] >> 7; 355 // read [tsid, tcid] for media, reporting. recovery respectively 356 caps->multiplexing_mode.transport_identifiers_num = 3; 357 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 358 caps->multiplexing_mode.transport_session_identifiers[i] = packet[pos++] >> 7; 359 caps->multiplexing_mode.tcid[i] = packet[pos++] >> 7; 360 } 361 break; 362 case AVDTP_MEDIA_CODEC: 363 caps->media_codec.media_type = packet[pos++] >> 4; 364 caps->media_codec.media_codec_type = packet[pos++]; 365 caps->media_codec.media_codec_information_len = cap_len - 2; 366 caps->media_codec.media_codec_information = &packet[pos]; 367 pos += caps->media_codec.media_codec_information_len; 368 break; 369 case AVDTP_MEDIA_TRANSPORT: 370 case AVDTP_REPORTING: 371 case AVDTP_DELAY_REPORTING: 372 pos += cap_len; 373 break; 374 default: 375 pos += cap_len; 376 rfa = 1; 377 break; 378 } 379 processed_cap_len = pos - processed_cap_len; 380 381 if (cap_len == processed_cap_len){ 382 if (!rfa) { 383 registered_service_categories = store_bit16(registered_service_categories, category, 1); 384 } 385 if (pos < size-2){ 386 //int old_pos = pos; 387 category = (avdtp_service_category_t)packet[pos++]; 388 cap_len = packet[pos++]; 389 if (avdtp_unpack_service_capabilities_has_errors(connection, category, cap_len)) return 0; 390 //printf("category %d, pos %d + 2 + %d -> %d\n", category, old_pos, cap_len, pos + cap_len); 391 //printf_hexdump(packet+old_pos, size-old_pos); 392 } 393 } 394 } 395 return registered_service_categories; 396 } 397 398 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){ 399 if (signaling_packet->offset) return; 400 uint8_t pack_all_capabilities = 1; 401 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 402 int i; 403 404 signaling_packet->size = 0; 405 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 406 407 408 switch (identifier) { 409 case AVDTP_SI_GET_CAPABILITIES: 410 pack_all_capabilities = 0; 411 break; 412 case AVDTP_SI_GET_ALL_CAPABILITIES: 413 pack_all_capabilities = 1; 414 break; 415 case AVDTP_SI_SET_CONFIGURATION: 416 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 417 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 418 signaling_packet->message_type = AVDTP_CMD_MSG; 419 break; 420 case AVDTP_SI_RECONFIGURE: 421 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 422 signaling_packet->message_type = AVDTP_CMD_MSG; 423 break; 424 default: 425 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 426 break; 427 } 428 429 // printf("registered_service_categories: 0x%02x\n", registered_service_categories); 430 431 // printf("command before packing:\n"); 432 // printf_hexdump(signaling_packet->command, signaling_packet->size); 433 for (i = 1; i < 9; i++){ 434 int registered_category = get_bit16(registered_service_categories, i); 435 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION || identifier == AVDTP_SI_RECONFIGURE)){ 436 // TODO: introduce bitmap of mandatory categories 437 if (i == 1){ 438 registered_category = 1; 439 } 440 } 441 if (registered_category){ 442 // service category 443 // printf("pack service category: %d\n", i); 444 signaling_packet->command[signaling_packet->size++] = i; 445 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); 446 } 447 } 448 // printf("command after packing:\n"); 449 // printf_hexdump(signaling_packet->command, signaling_packet->size); 450 451 signaling_packet->signal_identifier = identifier; 452 signaling_packet->transaction_label = transaction_label; 453 } 454 455 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 456 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 457 // hack for test 458 // int mtu = 6; 459 int data_len = 0; 460 461 uint16_t offset = signaling_packet->offset; 462 uint16_t pos = 1; 463 // printf(" avdtp_signaling_create_fragment offset %d, packet type %d\n", signaling_packet->offset, signaling_packet->packet_type); 464 465 if (offset == 0){ 466 if (signaling_packet->size <= mtu - 2){ 467 // printf(" AVDTP_SINGLE_PACKET\n"); 468 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 469 out_buffer[pos++] = signaling_packet->signal_identifier; 470 data_len = signaling_packet->size; 471 } else { 472 signaling_packet->packet_type = AVDTP_START_PACKET; 473 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 474 out_buffer[pos++] = signaling_packet->signal_identifier; 475 data_len = mtu - 3; 476 signaling_packet->offset = data_len; 477 // printf(" AVDTP_START_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 478 } 479 } else { 480 int remaining_bytes = signaling_packet->size - offset; 481 if (remaining_bytes <= mtu - 1){ 482 //signaling_packet->fragmentation = 1; 483 signaling_packet->packet_type = AVDTP_END_PACKET; 484 data_len = remaining_bytes; 485 signaling_packet->offset = 0; 486 // printf(" AVDTP_END_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 487 } else{ 488 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 489 data_len = mtu - 1; 490 signaling_packet->offset += data_len; 491 // printf(" AVDTP_CONTINUE_PACKET len %d, offset %d\n", signaling_packet->size, signaling_packet->offset); 492 } 493 } 494 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 495 memcpy(out_buffer+pos, signaling_packet->command + offset, data_len); 496 pos += data_len; 497 return pos; 498 } 499 500 501 void avdtp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t avdtp_cid, bd_addr_t addr, uint8_t status){ 502 if (!callback) return; 503 uint8_t event[12]; 504 int pos = 0; 505 event[pos++] = HCI_EVENT_AVDTP_META; 506 event[pos++] = sizeof(event) - 2; 507 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 508 little_endian_store_16(event, pos, avdtp_cid); 509 pos += 2; 510 reverse_bd_addr(addr,&event[pos]); 511 pos += 6; 512 event[pos++] = status; 513 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 514 } 515 516 void avdtp_streaming_emit_can_send_media_packet_now(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t seid, uint16_t sequence_number){ 517 if (!callback) return; 518 uint8_t event[8]; 519 int pos = 0; 520 event[pos++] = HCI_EVENT_AVDTP_META; 521 event[pos++] = sizeof(event) - 2; 522 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 523 little_endian_store_16(event, pos, avdtp_cid); 524 pos += 2; 525 event[pos++] = seid; 526 little_endian_store_16(event, pos, sequence_number); 527 pos += 2; 528 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 529 } 530 531 void avdtp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, uint8_t acp_seid, uint8_t status){ 532 if (!callback) return; 533 uint8_t event[8]; 534 int pos = 0; 535 event[pos++] = HCI_EVENT_AVDTP_META; 536 event[pos++] = sizeof(event) - 2; 537 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 538 little_endian_store_16(event, pos, avdtp_cid); 539 pos += 2; 540 event[pos++] = int_seid; 541 event[pos++] = acp_seid; 542 event[pos++] = status; 543 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 544 } 545 546 void avdtp_signaling_emit_sep(btstack_packet_handler_t callback, uint16_t avdtp_cid, avdtp_sep_t sep){ 547 if (!callback) return; 548 uint8_t event[9]; 549 int pos = 0; 550 event[pos++] = HCI_EVENT_AVDTP_META; 551 event[pos++] = sizeof(event) - 2; 552 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 553 little_endian_store_16(event, pos, avdtp_cid); 554 pos += 2; 555 event[pos++] = sep.seid; 556 event[pos++] = sep.in_use; 557 event[pos++] = sep.media_type; 558 event[pos++] = sep.type; 559 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 560 } 561 562 void avdtp_signaling_emit_accept(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, avdtp_signal_identifier_t identifier, uint8_t status){ 563 if (!callback) return; 564 uint8_t event[8]; 565 int pos = 0; 566 event[pos++] = HCI_EVENT_AVDTP_META; 567 event[pos++] = sizeof(event) - 2; 568 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 569 little_endian_store_16(event, pos, avdtp_cid); 570 pos += 2; 571 event[pos++] = int_seid; 572 event[pos++] = identifier; 573 event[pos++] = status; 574 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 575 } 576 577 void avdtp_signaling_emit_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, avdtp_signal_identifier_t identifier){ 578 if (!callback) return; 579 uint8_t event[7]; 580 int pos = 0; 581 event[pos++] = HCI_EVENT_AVDTP_META; 582 event[pos++] = sizeof(event) - 2; 583 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 584 little_endian_store_16(event, pos, avdtp_cid); 585 pos += 2; 586 event[pos++] = int_seid; 587 event[pos++] = identifier; 588 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 589 } 590 591 void avdtp_signaling_emit_general_reject(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, avdtp_signal_identifier_t identifier){ 592 if (!callback) return; 593 uint8_t event[7]; 594 int pos = 0; 595 event[pos++] = HCI_EVENT_AVDTP_META; 596 event[pos++] = sizeof(event) - 2; 597 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 598 little_endian_store_16(event, pos, avdtp_cid); 599 pos += 2; 600 event[pos++] = int_seid; 601 event[pos++] = identifier; 602 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 603 } 604 605 void avdtp_signaling_emit_media_codec_sbc_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, uint8_t acp_seid, adtvp_media_codec_capabilities_t media_codec){ 606 if (!callback) return; 607 uint8_t event[15]; 608 int pos = 0; 609 event[pos++] = HCI_EVENT_AVDTP_META; 610 event[pos++] = sizeof(event) - 2; 611 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 612 little_endian_store_16(event, pos, avdtp_cid); 613 pos += 2; 614 event[pos++] = int_seid; 615 event[pos++] = acp_seid; 616 event[pos++] = media_codec.media_type; 617 event[pos++] = media_codec.media_codec_information[0] >> 4; 618 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 619 event[pos++] = media_codec.media_codec_information[1] >> 4; 620 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 621 event[pos++] = media_codec.media_codec_information[1] & 0x03; 622 event[pos++] = media_codec.media_codec_information[2]; 623 event[pos++] = media_codec.media_codec_information[3]; 624 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 625 } 626 627 void avdtp_signaling_emit_media_codec_other_capability(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, uint8_t acp_seid, adtvp_media_codec_capabilities_t media_codec){ 628 if (!callback) return; 629 uint8_t event[111]; 630 int pos = 0; 631 event[pos++] = HCI_EVENT_AVDTP_META; 632 event[pos++] = sizeof(event) - 2; 633 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 634 little_endian_store_16(event, pos, avdtp_cid); 635 pos += 2; 636 event[pos++] = int_seid; 637 event[pos++] = acp_seid; 638 event[pos++] = media_codec.media_type; 639 little_endian_store_16(event, pos, media_codec.media_codec_type); 640 pos += 2; 641 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 642 pos += 2; 643 if (media_codec.media_codec_information_len < 100){ 644 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 645 } else { 646 memcpy(event+pos, media_codec.media_codec_information, 100); 647 } 648 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 649 } 650 651 static inline void avdtp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, uint8_t acp_seid, adtvp_media_codec_capabilities_t media_codec, uint8_t reconfigure){ 652 if (!callback) return; 653 uint8_t event[16+2]; 654 int pos = 0; 655 event[pos++] = HCI_EVENT_AVDTP_META; 656 event[pos++] = sizeof(event) - 2; 657 658 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 659 little_endian_store_16(event, pos, avdtp_cid); 660 pos += 2; 661 event[pos++] = int_seid; 662 event[pos++] = acp_seid; 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 avdtp_cid, uint8_t int_seid, uint8_t acp_seid, adtvp_media_codec_capabilities_t media_codec){ 732 if (!callback) return; 733 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, int_seid, acp_seid, media_codec, 0); 734 } 735 736 void avdtp_signaling_emit_media_codec_sbc_reconfiguration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, uint8_t acp_seid, adtvp_media_codec_capabilities_t media_codec){ 737 if (!callback) return; 738 avdtp_signaling_emit_media_codec_sbc(callback, avdtp_cid, int_seid, acp_seid, media_codec, 1); 739 } 740 741 static inline void avdtp_signaling_emit_media_codec_other(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, uint8_t acp_seid, adtvp_media_codec_capabilities_t media_codec, uint8_t reconfigure){ 742 uint8_t event[112]; 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, avdtp_cid); 748 pos += 2; 749 event[pos++] = int_seid; 750 event[pos++] = acp_seid; 751 event[pos++] = reconfigure; 752 753 event[pos++] = media_codec.media_type; 754 little_endian_store_16(event, pos, media_codec.media_codec_type); 755 pos += 2; 756 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 757 pos += 2; 758 759 if (media_codec.media_codec_information_len < 100){ 760 memcpy(event+pos, media_codec.media_codec_information, media_codec.media_codec_information_len); 761 } else { 762 memcpy(event+pos, media_codec.media_codec_information, 100); 763 } 764 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 765 } 766 767 void avdtp_signaling_emit_media_codec_other_configuration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, uint8_t acp_seid, adtvp_media_codec_capabilities_t media_codec){ 768 if (!callback) return; 769 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, int_seid, acp_seid, media_codec, 0); 770 } 771 772 void avdtp_signaling_emit_media_codec_other_reconfiguration(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t int_seid, uint8_t acp_seid, adtvp_media_codec_capabilities_t media_codec){ 773 if (!callback) return; 774 avdtp_signaling_emit_media_codec_other(callback, avdtp_cid, int_seid, acp_seid, media_codec, 1); 775 } 776 777 778 void avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 779 connection->wait_to_send_acceptor = 1; 780 l2cap_request_can_send_now_event(l2cap_cid); 781 } 782 void avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 783 connection->wait_to_send_initiator = 1; 784 l2cap_request_can_send_now_event(l2cap_cid); 785 } 786 void avdtp_request_can_send_now_self(avdtp_connection_t * connection, uint16_t l2cap_cid){ 787 connection->wait_to_send_self = 1; 788 l2cap_request_can_send_now_event(l2cap_cid); 789 } 790 791 uint8_t avdtp_get_index_of_remote_stream_endpoint_with_seid(avdtp_stream_endpoint_t * stream_endpoint, uint16_t seid){ 792 if (!stream_endpoint->connection) return 0xFF; 793 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid == seid){ 794 return stream_endpoint->remote_sep_index; 795 } 796 int i; 797 for (i=0; i < stream_endpoint->connection->remote_seps_num; i++){ 798 if (stream_endpoint->connection->remote_seps[i].seid == seid){ 799 return i; 800 } 801 } 802 return 0xFF; 803 } 804 805 uint8_t avdtp_find_remote_sep(avdtp_connection_t * connection, uint8_t remote_seid){ 806 if (!connection) return 0xFF; 807 int i; 808 for (i = 0; i < connection->remote_seps_num; i++){ 809 if (connection->remote_seps[i].seid == remote_seid){ 810 return i; 811 } 812 } 813 return 0xFF; 814 } 815