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 #include <stdint.h> 41 #include <string.h> 42 43 #include "btstack.h" 44 #include "avdtp.h" 45 #include "avdtp_util.h" 46 47 #define MAX_MEDIA_CODEC_INFORMATION_LENGTH 100 48 49 static const char * avdtp_si_name[] = { 50 "ERROR", 51 "AVDTP_SI_DISCOVER", 52 "AVDTP_SI_GET_CAPABILITIES", 53 "AVDTP_SI_SET_CONFIGURATION", 54 "AVDTP_SI_GET_CONFIGURATION", 55 "AVDTP_SI_RECONFIGURE", 56 "AVDTP_SI_OPEN", 57 "AVDTP_SI_START", 58 "AVDTP_SI_CLOSE", 59 "AVDTP_SI_SUSPEND", 60 "AVDTP_SI_ABORT", 61 "AVDTP_SI_SECURITY_CONTROL", 62 "AVDTP_SI_GET_ALL_CAPABILITIES", 63 "AVDTP_SI_DELAY_REPORT" 64 }; 65 const char * avdtp_si2str(uint16_t index){ 66 if ((index <= 0) || (index >= sizeof(avdtp_si_name)/sizeof(avdtp_si_name[0]) )) return avdtp_si_name[0]; 67 return avdtp_si_name[index]; 68 } 69 70 void avdtp_reset_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 71 stream_endpoint->media_con_handle = 0; 72 stream_endpoint->l2cap_media_cid = 0; 73 stream_endpoint->l2cap_reporting_cid = 0; 74 stream_endpoint->l2cap_recovery_cid = 0; 75 76 stream_endpoint->connection = NULL; 77 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 78 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 79 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 80 81 stream_endpoint->sep.in_use = 0; 82 memset(&stream_endpoint->remote_sep, 0, sizeof(avdtp_sep_t)); 83 // memset(&stream_endpoint->remote_capabilities, 0, sizeof(avdtp_capabilities_t)); 84 // memset(&stream_endpoint->remote_configuration, 0, sizeof(avdtp_capabilities_t)); 85 86 stream_endpoint->remote_capabilities_bitmap = 0; 87 stream_endpoint->remote_configuration_bitmap = 0; 88 89 stream_endpoint->media_disconnect = 0; 90 stream_endpoint->media_connect = 0; 91 stream_endpoint->start_stream = 0; 92 stream_endpoint->stop_stream = 0; 93 stream_endpoint->send_stream = 0; 94 stream_endpoint->abort_stream = 0; 95 stream_endpoint->suspend_stream = 0; 96 stream_endpoint->sequence_number = 0; 97 } 98 99 int get_bit16(uint16_t bitmap, int position){ 100 return (bitmap >> position) & 1; 101 } 102 103 uint16_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 104 if (value){ 105 bitmap |= 1 << position; 106 } else { 107 bitmap &= ~ (1 << position); 108 } 109 return bitmap; 110 } 111 112 avdtp_message_type_t avdtp_get_signaling_packet_type(uint8_t * packet){ 113 return (avdtp_message_type_t) (packet[0] & 0x03); 114 } 115 116 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 117 int pos = 0; 118 if (size < 2) return pos; 119 signaling_header->transaction_label = packet[pos] >> 4; 120 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 121 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 122 pos++; 123 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 124 switch (signaling_header->packet_type){ 125 case AVDTP_SINGLE_PACKET: 126 signaling_header->num_packets = 0; 127 signaling_header->offset = 0; 128 signaling_header->size = 0; 129 break; 130 case AVDTP_END_PACKET: 131 signaling_header->num_packets = 0; 132 break; 133 case AVDTP_START_PACKET: 134 signaling_header->num_packets = packet[pos++]; 135 signaling_header->size = 0; 136 signaling_header->offset = 0; 137 break; 138 case AVDTP_CONTINUE_PACKET: 139 if (signaling_header->num_packets <= 0) { 140 log_info(" ERROR: wrong num fragmented packets\n"); 141 break; 142 } 143 signaling_header->num_packets--; 144 break; 145 } 146 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 147 return pos; 148 } 149 150 int avdtp_pack_service_capabilities(uint8_t * buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category, uint8_t pack_all_capabilities){ 151 UNUSED(size); 152 153 int i; 154 // pos = 0 reserved for length 155 int pos = 1; 156 switch(category){ 157 case AVDTP_MEDIA_TRANSPORT: 158 case AVDTP_REPORTING: 159 break; 160 case AVDTP_DELAY_REPORTING: 161 if (!pack_all_capabilities) break; 162 break; 163 case AVDTP_RECOVERY: 164 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 165 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 166 buffer[pos++] = caps.recovery.maximum_number_media_packets; 167 break; 168 case AVDTP_CONTENT_PROTECTION: 169 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 170 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 171 pos += 2; 172 (void)memcpy(buffer + pos, caps.content_protection.cp_type_value, 173 caps.content_protection.cp_type_value_len); 174 break; 175 case AVDTP_HEADER_COMPRESSION: 176 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 177 break; 178 case AVDTP_MULTIPLEXING: 179 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 180 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 181 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 182 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 183 // media, reporting. recovery 184 } 185 break; 186 case AVDTP_MEDIA_CODEC: 187 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 188 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 189 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 190 buffer[pos++] = caps.media_codec.media_codec_information[i]; 191 } 192 break; 193 default: 194 break; 195 } 196 buffer[0] = pos - 1; // length 197 return pos; 198 } 199 200 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_signal_identifier_t signal_identifier, avdtp_service_category_t category, uint8_t cap_len){ 201 connection->error_code = 0; 202 203 if ((category == AVDTP_SERVICE_CATEGORY_INVALID_0) || 204 ((category == AVDTP_SERVICE_CATEGORY_INVALID_FF) && (signal_identifier == AVDTP_SI_RECONFIGURE))){ 205 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 206 connection->reject_service_category = category; 207 connection->error_code = BAD_SERV_CATEGORY; 208 return 1; 209 } 210 211 if (signal_identifier == AVDTP_SI_RECONFIGURE){ 212 if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ 213 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 214 connection->reject_service_category = category; 215 connection->error_code = INVALID_CAPABILITIES; 216 return 1; 217 } 218 } 219 220 switch(category){ 221 case AVDTP_MEDIA_TRANSPORT: 222 if (cap_len != 0){ 223 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 224 connection->reject_service_category = category; 225 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 226 return 1; 227 } 228 break; 229 case AVDTP_REPORTING: 230 case AVDTP_DELAY_REPORTING: 231 if (cap_len != 0){ 232 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 233 connection->reject_service_category = category; 234 connection->error_code = BAD_LENGTH; 235 return 1; 236 } 237 break; 238 case AVDTP_RECOVERY: 239 if (cap_len != 3){ 240 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 241 connection->reject_service_category = category; 242 connection->error_code = BAD_RECOVERY_FORMAT; 243 return 1; 244 } 245 break; 246 case AVDTP_CONTENT_PROTECTION: 247 if (cap_len < 2){ 248 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 249 connection->reject_service_category = category; 250 connection->error_code = BAD_CP_FORMAT; 251 return 1; 252 } 253 break; 254 case AVDTP_HEADER_COMPRESSION: 255 // TODO: find error code for bad header compression 256 if (cap_len != 1){ 257 log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); 258 connection->reject_service_category = category; 259 connection->error_code = BAD_RECOVERY_FORMAT; 260 return 1; 261 } 262 break; 263 case AVDTP_MULTIPLEXING: 264 break; 265 case AVDTP_MEDIA_CODEC: 266 break; 267 default: 268 break; 269 } 270 return 0; 271 } 272 273 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_signal_identifier_t signal_identifier, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 274 275 int i; 276 277 uint16_t registered_service_categories = 0; 278 uint16_t to_process = size; 279 280 while (to_process >= 2){ 281 282 avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; 283 uint8_t cap_len = packet[1]; 284 packet += 2; 285 to_process -= 2; 286 287 if (cap_len > to_process){ 288 connection->reject_service_category = category; 289 connection->error_code = BAD_LENGTH; 290 return 0; 291 } 292 293 if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; 294 295 int category_valid = 1; 296 297 uint8_t * data = packet; 298 uint16_t pos = 0; 299 300 switch(category){ 301 case AVDTP_RECOVERY: 302 caps->recovery.recovery_type = data[pos++]; 303 caps->recovery.maximum_recovery_window_size = data[pos++]; 304 caps->recovery.maximum_number_media_packets = data[pos++]; 305 break; 306 case AVDTP_CONTENT_PROTECTION: 307 caps->content_protection.cp_type = big_endian_read_16(data, 0); 308 caps->content_protection.cp_type_value_len = cap_len - 2; 309 // connection->reject_service_category = category; 310 // connection->error_code = UNSUPPORTED_CONFIGURATION; 311 // support for content protection goes here 312 break; 313 case AVDTP_HEADER_COMPRESSION: 314 caps->header_compression.back_ch = (data[0] >> 7) & 1; 315 caps->header_compression.media = (data[0] >> 6) & 1; 316 caps->header_compression.recovery = (data[0] >> 5) & 1; 317 break; 318 case AVDTP_MULTIPLEXING: 319 caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; 320 // read [tsid, tcid] for media, reporting. recovery respectively 321 caps->multiplexing_mode.transport_identifiers_num = 3; 322 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 323 caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; 324 caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; 325 } 326 break; 327 case AVDTP_MEDIA_CODEC: 328 caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); 329 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); 330 caps->media_codec.media_codec_information_len = cap_len - 2; 331 caps->media_codec.media_codec_information = &data[pos++]; 332 break; 333 case AVDTP_MEDIA_TRANSPORT: 334 case AVDTP_REPORTING: 335 case AVDTP_DELAY_REPORTING: 336 break; 337 default: 338 category_valid = 0; 339 break; 340 } 341 342 if (category_valid) { 343 registered_service_categories = store_bit16(registered_service_categories, category, 1); 344 } 345 346 packet += cap_len; 347 to_process -= cap_len; 348 } 349 350 return registered_service_categories; 351 } 352 353 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){ 354 if (signaling_packet->offset) return; 355 uint8_t pack_all_capabilities = 1; 356 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 357 int i; 358 359 signaling_packet->size = 0; 360 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 361 362 363 switch (identifier) { 364 case AVDTP_SI_GET_CAPABILITIES: 365 pack_all_capabilities = 0; 366 break; 367 case AVDTP_SI_GET_ALL_CAPABILITIES: 368 pack_all_capabilities = 1; 369 break; 370 case AVDTP_SI_SET_CONFIGURATION: 371 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 372 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 373 signaling_packet->message_type = AVDTP_CMD_MSG; 374 break; 375 case AVDTP_SI_RECONFIGURE: 376 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 377 signaling_packet->message_type = AVDTP_CMD_MSG; 378 break; 379 default: 380 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 381 break; 382 } 383 384 for (i = 1; i < 9; i++){ 385 int registered_category = get_bit16(registered_service_categories, i); 386 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ 387 // TODO: introduce bitmap of mandatory categories 388 if (i == 1){ 389 registered_category = 1; 390 } 391 } 392 if (registered_category){ 393 // service category 394 signaling_packet->command[signaling_packet->size++] = i; 395 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); 396 } 397 } 398 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 399 signaling_packet->transaction_label = transaction_label; 400 } 401 402 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 403 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 404 int data_len = 0; 405 406 uint16_t offset = signaling_packet->offset; 407 uint16_t pos = 1; 408 409 if (offset == 0){ 410 if (signaling_packet->size <= (mtu - 2)){ 411 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 412 out_buffer[pos++] = signaling_packet->signal_identifier; 413 data_len = signaling_packet->size; 414 } else { 415 signaling_packet->packet_type = AVDTP_START_PACKET; 416 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 417 out_buffer[pos++] = signaling_packet->signal_identifier; 418 data_len = mtu - 3; 419 signaling_packet->offset = data_len; 420 } 421 } else { 422 int remaining_bytes = signaling_packet->size - offset; 423 if (remaining_bytes <= (mtu - 1)){ 424 signaling_packet->packet_type = AVDTP_END_PACKET; 425 data_len = remaining_bytes; 426 signaling_packet->offset = 0; 427 } else{ 428 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 429 data_len = mtu - 1; 430 signaling_packet->offset += data_len; 431 } 432 } 433 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 434 (void)memcpy(out_buffer + pos, signaling_packet->command + offset, 435 data_len); 436 pos += data_len; 437 return pos; 438 } 439 440 441 void avdtp_signaling_emit_connection_established(uint16_t avdtp_cid, bd_addr_t addr, uint8_t status) { 442 uint8_t event[12]; 443 int pos = 0; 444 event[pos++] = HCI_EVENT_AVDTP_META; 445 event[pos++] = sizeof(event) - 2; 446 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 447 little_endian_store_16(event, pos, avdtp_cid); 448 pos += 2; 449 reverse_bd_addr(addr,&event[pos]); 450 pos += 6; 451 event[pos++] = status; 452 avdtp_emit_sink_and_source(event, pos); 453 } 454 455 void avdtp_signaling_emit_connection_released(uint16_t avdtp_cid) { 456 uint8_t event[5]; 457 int pos = 0; 458 event[pos++] = HCI_EVENT_AVDTP_META; 459 event[pos++] = sizeof(event) - 2; 460 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 461 little_endian_store_16(event, pos, avdtp_cid); 462 pos += 2; 463 avdtp_emit_sink_and_source(event, pos); 464 } 465 466 void avdtp_signaling_emit_sep(uint16_t avdtp_cid, avdtp_sep_t sep) { 467 uint8_t event[9]; 468 int pos = 0; 469 event[pos++] = HCI_EVENT_AVDTP_META; 470 event[pos++] = sizeof(event) - 2; 471 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 472 little_endian_store_16(event, pos, avdtp_cid); 473 pos += 2; 474 event[pos++] = sep.seid; 475 event[pos++] = sep.in_use; 476 event[pos++] = sep.media_type; 477 event[pos++] = sep.type; 478 avdtp_emit_sink_and_source(event, pos); 479 } 480 481 void avdtp_signaling_emit_sep_done(uint16_t avdtp_cid) { 482 uint8_t event[5]; 483 int pos = 0; 484 event[pos++] = HCI_EVENT_AVDTP_META; 485 event[pos++] = sizeof(event) - 2; 486 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; 487 little_endian_store_16(event, pos, avdtp_cid); 488 pos += 2; 489 avdtp_emit_sink_and_source(event, pos); 490 } 491 492 void avdtp_signaling_emit_accept(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 493 uint8_t event[8]; 494 int pos = 0; 495 event[pos++] = HCI_EVENT_AVDTP_META; 496 event[pos++] = sizeof(event) - 2; 497 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 498 little_endian_store_16(event, pos, avdtp_cid); 499 pos += 2; 500 event[pos++] = local_seid; 501 event[pos++] = is_initiator ? 1 : 0; 502 event[pos++] = identifier; 503 avdtp_emit_sink_and_source(event, pos); 504 } 505 506 void avdtp_signaling_emit_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 507 uint8_t event[8]; 508 int pos = 0; 509 event[pos++] = HCI_EVENT_AVDTP_META; 510 event[pos++] = sizeof(event) - 2; 511 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 512 little_endian_store_16(event, pos, avdtp_cid); 513 pos += 2; 514 event[pos++] = local_seid; 515 event[pos++] = is_initiator ? 1 : 0; 516 event[pos++] = identifier; 517 avdtp_emit_sink_and_source(event, pos); 518 } 519 520 void avdtp_signaling_emit_general_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 521 uint8_t event[8]; 522 int pos = 0; 523 event[pos++] = HCI_EVENT_AVDTP_META; 524 event[pos++] = sizeof(event) - 2; 525 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 526 little_endian_store_16(event, pos, avdtp_cid); 527 pos += 2; 528 event[pos++] = local_seid; 529 event[pos++] = is_initiator ? 1 : 0; 530 event[pos++] = identifier; 531 avdtp_emit_sink_and_source(event, pos); 532 } 533 534 static void avdtp_signaling_emit_media_codec_sbc_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 535 adtvp_media_codec_capabilities_t media_codec) { 536 uint8_t event[15]; 537 int pos = 0; 538 event[pos++] = HCI_EVENT_AVDTP_META; 539 event[pos++] = sizeof(event) - 2; 540 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 541 little_endian_store_16(event, pos, avdtp_cid); 542 pos += 2; 543 event[pos++] = local_seid; 544 event[pos++] = remote_seid; 545 event[pos++] = media_codec.media_type; 546 event[pos++] = media_codec.media_codec_information[0] >> 4; 547 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 548 event[pos++] = media_codec.media_codec_information[1] >> 4; 549 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 550 event[pos++] = media_codec.media_codec_information[1] & 0x03; 551 event[pos++] = media_codec.media_codec_information[2]; 552 event[pos++] = media_codec.media_codec_information[3]; 553 avdtp_emit_sink_and_source(event, pos); 554 } 555 556 static inline void 557 avdtp_signaling_emit_capability(uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 558 uint8_t event[7]; 559 int pos = 0; 560 event[pos++] = HCI_EVENT_AVDTP_META; 561 event[pos++] = sizeof(event) - 2; 562 event[pos++] = capability_subevent_id; 563 little_endian_store_16(event, pos, avdtp_cid); 564 pos += 2; 565 event[pos++] = local_seid; 566 event[pos++] = remote_seid; 567 avdtp_emit_sink_and_source(event, pos); 568 } 569 570 static void 571 avdtp_signaling_emit_media_transport_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 572 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, local_seid, 573 remote_seid); 574 } 575 576 static void avdtp_signaling_emit_reporting_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 577 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, local_seid, remote_seid); 578 } 579 580 static void 581 avdtp_signaling_emit_delay_reporting_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 582 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, local_seid, 583 remote_seid); 584 } 585 586 static void avdtp_signaling_emit_recovery_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 587 avdtp_recovery_capabilities_t *recovery) { 588 uint8_t event[10]; 589 int pos = 0; 590 event[pos++] = HCI_EVENT_AVDTP_META; 591 event[pos++] = sizeof(event) - 2; 592 event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; 593 little_endian_store_16(event, pos, avdtp_cid); 594 pos += 2; 595 event[pos++] = local_seid; 596 event[pos++] = remote_seid; 597 event[pos++] = recovery->recovery_type; 598 event[pos++] = recovery->maximum_recovery_window_size; 599 event[pos++] = recovery->maximum_number_media_packets; 600 avdtp_emit_sink_and_source(event, pos); 601 } 602 603 static void 604 avdtp_signaling_emit_content_protection_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 605 adtvp_content_protection_t *content_protection) { 606 uint8_t event[22]; 607 int pos = 0; 608 event[pos++] = HCI_EVENT_AVDTP_META; 609 event[pos++] = sizeof(event) - 2; 610 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; 611 little_endian_store_16(event, pos, avdtp_cid); 612 pos += 2; 613 event[pos++] = local_seid; 614 event[pos++] = remote_seid; 615 616 little_endian_store_16(event, pos, content_protection->cp_type); 617 pos += 2; 618 little_endian_store_16(event, pos, content_protection->cp_type_value_len); 619 pos += 2; 620 621 //TODO: reserve place for value 622 if (content_protection->cp_type_value_len < 10){ 623 (void)memcpy(event + pos, content_protection->cp_type_value, 624 content_protection->cp_type_value_len); 625 } 626 avdtp_emit_sink_and_source(event, pos); 627 } 628 629 630 static void 631 avdtp_signaling_emit_header_compression_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 632 avdtp_header_compression_capabilities_t *header_compression) { 633 uint8_t event[10]; 634 int pos = 0; 635 event[pos++] = HCI_EVENT_AVDTP_META; 636 event[pos++] = sizeof(event) - 2; 637 event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; 638 little_endian_store_16(event, pos, avdtp_cid); 639 pos += 2; 640 event[pos++] = local_seid; 641 event[pos++] = remote_seid; 642 event[pos++] = header_compression->back_ch; 643 event[pos++] = header_compression->media; 644 event[pos++] = header_compression->recovery; 645 avdtp_emit_sink_and_source(event, pos); 646 } 647 648 static void 649 avdtp_signaling_emit_content_multiplexing_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 650 avdtp_multiplexing_mode_capabilities_t *multiplexing_mode) { 651 uint8_t event[15]; 652 int pos = 0; 653 event[pos++] = HCI_EVENT_AVDTP_META; 654 event[pos++] = sizeof(event) - 2; 655 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; 656 little_endian_store_16(event, pos, avdtp_cid); 657 pos += 2; 658 event[pos++] = local_seid; 659 event[pos++] = remote_seid; 660 661 event[pos++] = multiplexing_mode->fragmentation; 662 event[pos++] = multiplexing_mode->transport_identifiers_num; 663 664 int i; 665 for (i = 0; i < 3; i++){ 666 event[pos++] = multiplexing_mode->transport_session_identifiers[i]; 667 } 668 for (i = 0; i < 3; i++){ 669 event[pos++] = multiplexing_mode->tcid[i]; 670 } 671 avdtp_emit_sink_and_source(event, pos); 672 } 673 674 static void 675 avdtp_signaling_emit_media_codec_other_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 676 adtvp_media_codec_capabilities_t media_codec) { 677 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 12]; 678 int pos = 0; 679 event[pos++] = HCI_EVENT_AVDTP_META; 680 event[pos++] = sizeof(event) - 2; 681 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 682 little_endian_store_16(event, pos, avdtp_cid); 683 pos += 2; 684 event[pos++] = local_seid; 685 event[pos++] = remote_seid; 686 event[pos++] = media_codec.media_type; 687 little_endian_store_16(event, pos, media_codec.media_codec_type); 688 pos += 2; 689 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 690 pos += 2; 691 (void)memcpy(event + pos, media_codec.media_codec_information, 692 btstack_min(media_codec.media_codec_information_len, MAX_MEDIA_CODEC_INFORMATION_LENGTH)); 693 avdtp_emit_sink_and_source(event, pos); 694 } 695 696 static void avdtp_signaling_emit_capability_done(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 697 uint8_t event[7]; 698 int pos = 0; 699 event[pos++] = HCI_EVENT_AVDTP_META; 700 event[pos++] = sizeof(event) - 2; 701 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 702 little_endian_store_16(event, pos, avdtp_cid); 703 pos += 2; 704 event[pos++] = local_seid; 705 event[pos++] = remote_seid; 706 avdtp_emit_sink_and_source(event, pos); 707 } 708 709 void avdtp_signaling_emit_media_codec_other(btstack_packet_handler_t callback, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec, uint8_t reconfigure){ 710 btstack_assert(callback != NULL); 711 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 13]; 712 int pos = 0; 713 event[pos++] = HCI_EVENT_AVDTP_META; 714 event[pos++] = sizeof(event) - 2; 715 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 716 little_endian_store_16(event, pos, avdtp_cid); 717 pos += 2; 718 event[pos++] = local_seid; 719 event[pos++] = remote_seid; 720 event[pos++] = reconfigure; 721 event[pos++] = media_codec.media_type; 722 little_endian_store_16(event, pos, media_codec.media_codec_type); 723 pos += 2; 724 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 725 pos += 2; 726 727 int media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec.media_codec_information_len); 728 (void)memcpy(event + pos, media_codec.media_codec_information, 729 media_codec_len); 730 731 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 732 } 733 734 void avdtp_emit_capabilities(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_capabilities_t *capabilities, 735 uint16_t registered_service_categories) { 736 if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ 737 switch (capabilities->media_codec.media_codec_type){ 738 case AVDTP_CODEC_SBC: 739 avdtp_signaling_emit_media_codec_sbc_capability(avdtp_cid, local_seid, remote_seid, capabilities->media_codec); 740 break; 741 default: 742 avdtp_signaling_emit_media_codec_other_capability(avdtp_cid, local_seid, remote_seid, capabilities->media_codec); 743 break; 744 } 745 } 746 747 if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ 748 avdtp_signaling_emit_media_transport_capability(avdtp_cid, local_seid, remote_seid); 749 } 750 if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ 751 avdtp_signaling_emit_reporting_capability(avdtp_cid, local_seid, remote_seid); 752 } 753 if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ 754 avdtp_signaling_emit_recovery_capability(avdtp_cid, local_seid, remote_seid, &capabilities->recovery); 755 } 756 if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ 757 avdtp_signaling_emit_content_protection_capability(avdtp_cid, local_seid, remote_seid, 758 &capabilities->content_protection); 759 } 760 if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ 761 avdtp_signaling_emit_header_compression_capability(avdtp_cid, local_seid, remote_seid, 762 &capabilities->header_compression); 763 } 764 if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ 765 avdtp_signaling_emit_content_multiplexing_capability(avdtp_cid, local_seid, remote_seid, 766 &capabilities->multiplexing_mode); 767 } 768 if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ 769 avdtp_signaling_emit_delay_reporting_capability(avdtp_cid, local_seid, remote_seid); 770 } 771 avdtp_signaling_emit_capability_done(avdtp_cid, local_seid, remote_seid); 772 } 773 774 uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 775 if (!connection) return AVDTP_CONNECTION_DOES_NOT_EXIST; 776 connection->wait_to_send_acceptor = 1; 777 l2cap_request_can_send_now_event(l2cap_cid); 778 return ERROR_CODE_SUCCESS; 779 } 780 781 uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 782 if (!connection) return AVDTP_CONNECTION_DOES_NOT_EXIST; 783 connection->wait_to_send_initiator = 1; 784 l2cap_request_can_send_now_event(l2cap_cid); 785 return ERROR_CODE_SUCCESS; 786 } 787 788 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 789 if (!stream_endpoint) return 0; 790 return stream_endpoint->sep.seid; 791 792 } 793 794 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 795 if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; 796 return stream_endpoint->remote_sep.seid; 797 } 798 799 void a2dp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t cid, bd_addr_t addr, uint8_t local_seid, uint8_t remote_seid, uint8_t status){ 800 btstack_assert(callback != NULL); 801 uint8_t event[14]; 802 int pos = 0; 803 event[pos++] = HCI_EVENT_A2DP_META; 804 event[pos++] = sizeof(event) - 2; 805 event[pos++] = A2DP_SUBEVENT_STREAM_ESTABLISHED; 806 little_endian_store_16(event, pos, cid); 807 pos += 2; 808 reverse_bd_addr(addr,&event[pos]); 809 pos += 6; 810 event[pos++] = local_seid; 811 event[pos++] = remote_seid; 812 event[pos++] = status; 813 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 814 } 815