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 BLUEKITCHEN 24 * GMBH 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 #define BTSTACK_FILE__ "avdtp_acceptor.c" 38 39 #include <stdint.h> 40 #include <string.h> 41 42 #include "classic/avdtp.h" 43 #include "classic/avdtp_util.h" 44 #include "classic/avdtp_acceptor.h" 45 46 #include "btstack_debug.h" 47 #include "btstack_util.h" 48 #include "l2cap.h" 49 50 51 static int avdtp_acceptor_send_accept_response(uint16_t cid, uint8_t transaction_label, avdtp_signal_identifier_t identifier){ 52 uint8_t command[2]; 53 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_ACCEPT_MSG); 54 command[1] = (uint8_t)identifier; 55 return l2cap_send(cid, command, sizeof(command)); 56 } 57 58 // returns true if command complete 59 static bool avdtp_acceptor_process_chunk(avdtp_signaling_packet_t * signaling_packet, uint8_t * packet, uint16_t size){ 60 if ((signaling_packet->size + size) >= sizeof(signaling_packet->command)) { 61 log_info("Dropping incoming data, doesn't fit into command buffer"); 62 signaling_packet->size = 0; 63 return false; 64 } 65 66 (void)memcpy(signaling_packet->command + signaling_packet->size, packet, size); 67 signaling_packet->size += size; 68 return (signaling_packet->packet_type == AVDTP_SINGLE_PACKET) || (signaling_packet->packet_type == AVDTP_END_PACKET); 69 } 70 71 static int avdtp_acceptor_validate_msg_length(avdtp_signal_identifier_t signal_identifier, uint16_t msg_size){ 72 int minimal_msg_lenght = 2; 73 switch (signal_identifier){ 74 case AVDTP_SI_GET_CAPABILITIES: 75 case AVDTP_SI_GET_ALL_CAPABILITIES: 76 case AVDTP_SI_SET_CONFIGURATION: 77 case AVDTP_SI_GET_CONFIGURATION: 78 case AVDTP_SI_START: 79 case AVDTP_SI_CLOSE: 80 case AVDTP_SI_ABORT: 81 case AVDTP_SI_RECONFIGURE: 82 case AVDTP_SI_OPEN: 83 minimal_msg_lenght = 3; 84 break; 85 default: 86 break; 87 } 88 return msg_size >= minimal_msg_lenght; 89 } 90 91 static void 92 avdtp_acceptor_handle_configuration_command(avdtp_connection_t *connection, int offset, uint16_t packet_size, avdtp_stream_endpoint_t *stream_endpoint) { 93 log_info("W2_ANSWER_SET_CONFIGURATION cid 0x%02x", connection->avdtp_cid); 94 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE; 95 stream_endpoint->connection = connection; 96 97 // process capabilities, first rejected service category is stored in connection 98 connection->reject_service_category = 0; 99 avdtp_sep_t sep; 100 sep.seid = connection->acceptor_signaling_packet.command[offset++] >> 2; 101 sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, connection->acceptor_signaling_packet.signal_identifier, &sep.configuration, connection->acceptor_signaling_packet.command+offset, packet_size-offset); 102 sep.in_use = 1; 103 104 // test if sep already in use 105 if (stream_endpoint->sep.in_use != 0){ 106 log_info("stream endpoint already in use"); 107 connection->error_code = AVDTP_ERROR_CODE_SEP_IN_USE; 108 connection->reject_service_category = 0; 109 } 110 111 // let application validate media configuration as well 112 if (connection->error_code == 0){ 113 if ((sep.configured_service_categories & (1 << AVDTP_MEDIA_CODEC)) != 0){ 114 const adtvp_media_codec_capabilities_t * media = &sep.configuration.media_codec; 115 uint8_t error_code = avdtp_validate_media_configuration(stream_endpoint, connection->avdtp_cid, 0, media); 116 if (error_code != 0){ 117 log_info("media codec rejected by validator, error 0x%02x", error_code); 118 connection->reject_service_category = AVDTP_MEDIA_CODEC; 119 connection->error_code = error_code; 120 } 121 } 122 } 123 124 if (connection->error_code){ 125 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 126 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 127 return; 128 } 129 130 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_SET_CONFIGURATION; 131 // find or add sep 132 133 log_info("local seid %d, remote seid %d", connection->acceptor_local_seid, sep.seid); 134 135 if (is_avdtp_remote_seid_registered(stream_endpoint)){ 136 if (stream_endpoint->remote_sep.in_use){ 137 log_info("remote seid already in use"); 138 connection->error_code = AVDTP_ERROR_CODE_SEP_IN_USE; 139 // find first registered category and fire the error 140 connection->reject_service_category = 0; 141 int i; 142 for (i = 1; i < 9; i++){ 143 if (get_bit16(sep.configured_service_categories, i)){ 144 connection->reject_service_category = i; 145 break; 146 } 147 } 148 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 149 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 150 return; 151 } else { 152 stream_endpoint->remote_sep = sep; 153 log_info("update remote seid %d", stream_endpoint->remote_sep.seid); 154 } 155 } else { 156 // add new 157 stream_endpoint->remote_sep = sep; 158 log_info("add remote seid %d", stream_endpoint->remote_sep.seid); 159 } 160 161 // mark as in_use 162 stream_endpoint->sep.in_use = 1; 163 164 // if media codec configuration set, copy configuration and emit event 165 if ((sep.configured_service_categories & (1 << AVDTP_MEDIA_CODEC)) != 0){ 166 if (stream_endpoint->media_codec_configuration_len == sep.configuration.media_codec.media_codec_information_len){ 167 (void) memcpy(stream_endpoint->media_codec_configuration_info, sep.configuration.media_codec.media_codec_information, stream_endpoint->media_codec_configuration_len); 168 avdtp_signaling_emit_configuration(stream_endpoint, connection->avdtp_cid, 0, &sep.configuration, sep.configured_service_categories); 169 } 170 } 171 172 avdtp_signaling_emit_accept(connection->avdtp_cid, avdtp_local_seid(stream_endpoint), 173 connection->acceptor_signaling_packet.signal_identifier, false); 174 } 175 176 void avdtp_acceptor_stream_config_subsm(avdtp_connection_t *connection, uint8_t *packet, uint16_t size, int offset) { 177 avdtp_stream_endpoint_t * stream_endpoint = NULL; 178 connection->acceptor_transaction_label = connection->acceptor_signaling_packet.transaction_label; 179 if (!avdtp_acceptor_validate_msg_length(connection->acceptor_signaling_packet.signal_identifier, size)) { 180 connection->error_code = AVDTP_ERROR_CODE_BAD_LENGTH; 181 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 182 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 183 avdtp_request_can_send_now_acceptor(connection); 184 return; 185 } 186 187 // handle error cases 188 switch (connection->acceptor_signaling_packet.signal_identifier){ 189 case AVDTP_SI_DISCOVER: 190 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 191 log_info("W2_ANSWER_DISCOVER_SEPS"); 192 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS; 193 avdtp_request_can_send_now_acceptor(connection); 194 return; 195 case AVDTP_SI_GET_CAPABILITIES: 196 case AVDTP_SI_GET_ALL_CAPABILITIES: 197 case AVDTP_SI_SET_CONFIGURATION: 198 case AVDTP_SI_GET_CONFIGURATION: 199 case AVDTP_SI_START: 200 case AVDTP_SI_CLOSE: 201 case AVDTP_SI_ABORT: 202 case AVDTP_SI_OPEN: 203 case AVDTP_SI_RECONFIGURE: 204 case AVDTP_SI_DELAYREPORT: 205 connection->acceptor_local_seid = packet[offset++] >> 2; 206 stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->acceptor_local_seid); 207 if (!stream_endpoint){ 208 log_info("cmd %d - REJECT", connection->acceptor_signaling_packet.signal_identifier); 209 connection->error_code = AVDTP_ERROR_CODE_BAD_ACP_SEID; 210 if (connection->acceptor_signaling_packet.signal_identifier == AVDTP_SI_OPEN){ 211 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 212 } 213 214 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 215 if (connection->acceptor_signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 216 connection->reject_service_category = connection->acceptor_local_seid; 217 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 218 } 219 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 220 avdtp_request_can_send_now_acceptor(connection); 221 return; 222 } 223 break; 224 225 case AVDTP_SI_SUSPEND:{ 226 int i; 227 log_info("AVDTP_SI_SUSPEND"); 228 connection->num_suspended_seids = 0; 229 230 for (i = offset; i < size; i++){ 231 connection->suspended_seids[connection->num_suspended_seids] = packet[i] >> 2; 232 offset++; 233 log_info("%d, ", connection->suspended_seids[connection->num_suspended_seids]); 234 connection->num_suspended_seids++; 235 } 236 237 if (connection->num_suspended_seids == 0) { 238 log_info("no susspended seids, BAD_ACP_SEID"); 239 connection->error_code = AVDTP_ERROR_CODE_BAD_ACP_SEID; 240 connection->reject_service_category = connection->acceptor_local_seid; 241 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 242 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 243 avdtp_request_can_send_now_acceptor(connection); 244 return; 245 } 246 // deal with first susspended seid 247 connection->acceptor_local_seid = connection->suspended_seids[0]; 248 stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->acceptor_local_seid); 249 if (!stream_endpoint){ 250 log_info("stream_endpoint not found, BAD_ACP_SEID"); 251 connection->error_code = AVDTP_ERROR_CODE_BAD_ACP_SEID; 252 connection->reject_service_category = connection->acceptor_local_seid; 253 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 254 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 255 connection->num_suspended_seids = 0; 256 avdtp_request_can_send_now_acceptor(connection); 257 return; 258 } 259 break; 260 } 261 default: 262 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE; 263 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 264 log_info("AVDTP_CMD_MSG signal %d not implemented, general reject", connection->acceptor_signaling_packet.signal_identifier); 265 avdtp_request_can_send_now_acceptor(connection); 266 return; 267 } 268 269 btstack_assert(stream_endpoint != NULL); 270 271 bool command_complete = avdtp_acceptor_process_chunk(&connection->acceptor_signaling_packet, packet, size); 272 if (!command_complete) return; 273 274 uint16_t packet_size = connection->acceptor_signaling_packet.size; 275 connection->acceptor_signaling_packet.size = 0; 276 277 int request_to_send = 1; 278 switch (stream_endpoint->acceptor_config_state){ 279 case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE: 280 switch (connection->acceptor_signaling_packet.signal_identifier){ 281 case AVDTP_SI_DELAYREPORT: 282 log_info("W2_ANSWER_DELAY_REPORT, local seid %d", connection->acceptor_local_seid); 283 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_DELAY_REPORT; 284 avdtp_signaling_emit_delay(connection->avdtp_cid, connection->acceptor_local_seid, 285 big_endian_read_16(packet, offset)); 286 break; 287 288 case AVDTP_SI_GET_ALL_CAPABILITIES: 289 log_info("AVDTP_SI_GET_ALL_CAPABILITIES, local seid %d", connection->acceptor_local_seid); 290 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_GET_ALL_CAPABILITIES; 291 break; 292 case AVDTP_SI_GET_CAPABILITIES: 293 log_info("W2_ANSWER_GET_CAPABILITIES, local seid %d", connection->acceptor_local_seid); 294 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_GET_CAPABILITIES; 295 break; 296 case AVDTP_SI_SET_CONFIGURATION:{ 297 log_info("Received SET_CONFIGURATION cmd: config state %d", connection->configuration_state); 298 switch (connection->configuration_state){ 299 case AVDTP_CONFIGURATION_STATE_IDLE: 300 avdtp_acceptor_handle_configuration_command(connection, offset, packet_size, 301 stream_endpoint); 302 connection->configuration_state = AVDTP_CONFIGURATION_STATE_REMOTE_INITIATED; 303 break; 304 case AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED: 305 case AVDTP_CONFIGURATION_STATE_REMOTE_INITIATED: 306 log_info("Reject SET_CONFIGURATION BAD_STATE %d", connection->configuration_state); 307 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 308 connection->reject_service_category = 0; 309 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 310 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 311 break; 312 case AVDTP_CONFIGURATION_STATE_LOCAL_CONFIGURED: 313 case AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED: 314 log_info("Reject SET_CONFIGURATION SEP_IN_USE"); 315 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 316 connection->reject_service_category = 0; 317 connection->error_code = AVDTP_ERROR_CODE_SEP_IN_USE; 318 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 319 break; 320 default: 321 break; 322 } 323 break; 324 } 325 case AVDTP_SI_RECONFIGURE:{ 326 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_RECONFIGURE; 327 connection->reject_service_category = 0; 328 329 avdtp_sep_t sep; 330 log_info("W2_ANSWER_RECONFIGURE, local seid %d, remote seid %d", connection->acceptor_local_seid, stream_endpoint->remote_sep.seid); 331 sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, connection->acceptor_signaling_packet.signal_identifier, &sep.configuration, connection->acceptor_signaling_packet.command+offset, packet_size-offset); 332 if (connection->error_code){ 333 // fire configuration parsing errors 334 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 335 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 336 break; 337 } 338 339 // find sep or raise error 340 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 341 log_info("REJECT AVDTP_SI_RECONFIGURE, BAD_ACP_SEID"); 342 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 343 connection->error_code = AVDTP_ERROR_CODE_BAD_ACP_SEID; 344 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 345 break; 346 } 347 stream_endpoint->remote_sep.configured_service_categories = sep.configured_service_categories; 348 stream_endpoint->remote_sep.configuration = sep.configuration; 349 350 log_info("update active remote seid %d", stream_endpoint->remote_sep.seid); 351 352 // if media codec configuration updated, copy configuration and emit event 353 if ((sep.configured_service_categories & (1 << AVDTP_MEDIA_CODEC)) != 0){ 354 if (stream_endpoint->media_codec_configuration_len == sep.configuration.media_codec.media_codec_information_len){ 355 (void) memcpy(stream_endpoint->media_codec_configuration_info, sep.configuration.media_codec.media_codec_information, stream_endpoint->media_codec_configuration_len); 356 stream_endpoint->sep.configuration.media_codec = stream_endpoint->remote_configuration.media_codec; 357 avdtp_signaling_emit_configuration(stream_endpoint, connection->avdtp_cid, 1, &sep.configuration, sep.configured_service_categories); 358 } 359 } 360 break; 361 } 362 363 case AVDTP_SI_GET_CONFIGURATION: 364 log_info("W2_ANSWER_GET_CONFIGURATION"); 365 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_GET_CONFIGURATION; 366 break; 367 case AVDTP_SI_OPEN: 368 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_CONFIGURED){ 369 log_info("REJECT AVDTP_SI_OPEN, BAD_STATE"); 370 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 371 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 372 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 373 break; 374 } 375 log_info("AVDTP_STREAM_ENDPOINT_W2_ANSWER_OPEN_STREAM"); 376 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_OPEN_STREAM; 377 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED; 378 connection->acceptor_local_seid = stream_endpoint->sep.seid; 379 break; 380 case AVDTP_SI_START: 381 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_OPENED){ 382 log_info("REJECT AVDTP_SI_START, BAD_STATE, state %d", stream_endpoint->state); 383 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 384 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 385 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 386 break; 387 } 388 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 389 log_info("W2_ACCEPT_START_STREAM"); 390 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W4_USER_CONFIRM_START_STREAM; 391 #else 392 log_info("W2_ANSWER_START_STREAM"); 393 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_START_STREAM; 394 #endif 395 break; 396 case AVDTP_SI_CLOSE: 397 switch (stream_endpoint->state){ 398 case AVDTP_STREAM_ENDPOINT_OPENED: 399 case AVDTP_STREAM_ENDPOINT_STREAMING: 400 log_info("W2_ANSWER_CLOSE_STREAM"); 401 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING; 402 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_CLOSE_STREAM; 403 break; 404 default: 405 log_info("AVDTP_SI_CLOSE, bad state %d ", stream_endpoint->state); 406 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 407 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 408 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 409 break; 410 } 411 break; 412 case AVDTP_SI_ABORT: 413 switch (stream_endpoint->state){ 414 case AVDTP_STREAM_ENDPOINT_CONFIGURED: 415 case AVDTP_STREAM_ENDPOINT_CLOSING: 416 case AVDTP_STREAM_ENDPOINT_OPENED: 417 case AVDTP_STREAM_ENDPOINT_STREAMING: 418 log_info("W2_ANSWER_ABORT_STREAM"); 419 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 420 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_ABORT_STREAM; 421 break; 422 default: 423 log_info("AVDTP_SI_ABORT, bad state %d ", stream_endpoint->state); 424 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 425 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 426 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 427 break; 428 } 429 break; 430 case AVDTP_SI_SUSPEND: 431 switch (stream_endpoint->state){ 432 case AVDTP_STREAM_ENDPOINT_OPENED: 433 case AVDTP_STREAM_ENDPOINT_STREAMING: 434 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 435 connection->num_suspended_seids--; 436 if (connection->num_suspended_seids <= 0){ 437 log_info("W2_ANSWER_SUSPEND_STREAM"); 438 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_SUSPEND_STREAM; 439 } 440 break; 441 default: 442 log_info("AVDTP_SI_SUSPEND, bad state %d", stream_endpoint->state); 443 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 444 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 445 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 446 break; 447 } 448 break; 449 default: 450 log_info("NOT IMPLEMENTED, Reject signal_identifier %02x", connection->acceptor_signaling_packet.signal_identifier); 451 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD; 452 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 453 break; 454 } 455 break; 456 default: 457 return; 458 } 459 460 if (!request_to_send){ 461 log_info("NOT IMPLEMENTED"); 462 } 463 avdtp_request_can_send_now_acceptor(connection); 464 } 465 466 static int avdtp_acceptor_send_seps_response(uint16_t cid, uint8_t transaction_label, avdtp_stream_endpoint_t * endpoints){ 467 uint8_t command[2+2*AVDTP_MAX_NUM_SEPS]; 468 int pos = 0; 469 command[pos++] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_ACCEPT_MSG); 470 command[pos++] = (uint8_t)AVDTP_SI_DISCOVER; 471 472 btstack_linked_list_iterator_t it; 473 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) endpoints); 474 while (btstack_linked_list_iterator_has_next(&it)){ 475 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 476 command[pos++] = (stream_endpoint->sep.seid << 2) | (stream_endpoint->sep.in_use<<1); 477 command[pos++] = (stream_endpoint->sep.media_type << 4) | (stream_endpoint->sep.type << 3); 478 } 479 return l2cap_send(cid, command, pos); 480 } 481 482 static int avdtp_acceptor_send_response_reject_service_category(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t category, uint8_t error_code, uint8_t transaction_label){ 483 uint8_t command[4]; 484 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 485 command[1] = (uint8_t)identifier; 486 command[2] = category; 487 command[3] = error_code; 488 return l2cap_send(cid, command, sizeof(command)); 489 } 490 491 static int avdtp_acceptor_send_response_general_reject(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 492 uint8_t command[2]; 493 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_GENERAL_REJECT_MSG); 494 command[1] = (uint8_t)identifier; 495 return l2cap_send(cid, command, sizeof(command)); 496 } 497 498 static int avdtp_acceptor_send_response_reject(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 499 uint8_t command[2]; 500 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 501 command[1] = (uint8_t)identifier; 502 return l2cap_send(cid, command, sizeof(command)); 503 } 504 505 static int avdtp_acceptor_send_response_reject_with_error_code(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t error_code, uint8_t transaction_label){ 506 uint8_t command[3]; 507 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 508 command[1] = (uint8_t)identifier; 509 command[2] = error_code; 510 return l2cap_send(cid, command, sizeof(command)); 511 } 512 513 void avdtp_acceptor_stream_config_subsm_run(avdtp_connection_t *connection) { 514 int sent = 1; 515 btstack_linked_list_t * stream_endpoints = avdtp_get_stream_endpoints(); 516 517 switch (connection->acceptor_connection_state){ 518 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS: 519 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 520 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 521 avdtp_acceptor_send_seps_response(connection->l2cap_signaling_cid, connection->acceptor_transaction_label, (avdtp_stream_endpoint_t *) stream_endpoints); 522 avdtp_signaling_emit_accept(connection->avdtp_cid, 0, connection->acceptor_signaling_packet.signal_identifier, false); 523 break; 524 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE: 525 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 526 avdtp_acceptor_send_response_reject_with_error_code(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->error_code, connection->acceptor_transaction_label); 527 break; 528 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE: 529 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 530 avdtp_acceptor_send_response_reject_service_category(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->reject_service_category, connection->error_code, connection->acceptor_transaction_label); 531 break; 532 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE: 533 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 534 avdtp_acceptor_send_response_general_reject(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->acceptor_transaction_label); 535 break; 536 default: 537 sent = 0; 538 break; 539 } 540 if (sent){ 541 log_info("DONE"); 542 return; 543 } 544 545 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->acceptor_local_seid); 546 if (!stream_endpoint) return; 547 548 uint8_t reject_service_category = connection->reject_service_category; 549 avdtp_signal_identifier_t reject_signal_identifier = connection->reject_signal_identifier; 550 uint8_t error_code = connection->error_code; 551 uint16_t cid = stream_endpoint->connection ? stream_endpoint->connection->l2cap_signaling_cid : connection->l2cap_signaling_cid; 552 uint8_t trid = stream_endpoint->connection ? stream_endpoint->connection->acceptor_transaction_label : connection->acceptor_transaction_label; 553 554 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state = stream_endpoint->acceptor_config_state; 555 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 556 uint8_t * out_buffer; 557 uint16_t pos; 558 559 bool emit_accept = false; 560 bool emit_reject = false; 561 562 switch (acceptor_config_state){ 563 case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE: 564 break; 565 case AVDTP_ACCEPTOR_W2_ACCEPT_GET_CAPABILITIES: 566 avdtp_prepare_capabilities(&connection->acceptor_signaling_packet, trid, stream_endpoint->sep.registered_service_categories, stream_endpoint->sep.capabilities, AVDTP_SI_GET_CAPABILITIES); 567 l2cap_reserve_packet_buffer(); 568 out_buffer = l2cap_get_outgoing_buffer(); 569 pos = avdtp_signaling_create_fragment(cid, &connection->acceptor_signaling_packet, out_buffer); 570 if ((connection->acceptor_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->acceptor_signaling_packet.packet_type != AVDTP_END_PACKET)){ 571 stream_endpoint->acceptor_config_state = acceptor_config_state; 572 log_info("fragmented"); 573 } else { 574 log_info("ACP:DONE"); 575 emit_accept = true; 576 } 577 l2cap_send_prepared(cid, pos); 578 break; 579 case AVDTP_ACCEPTOR_W2_ACCEPT_DELAY_REPORT: 580 log_info("DONE "); 581 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_DELAYREPORT); 582 emit_accept = true; 583 break; 584 case AVDTP_ACCEPTOR_W2_ACCEPT_GET_ALL_CAPABILITIES: 585 avdtp_prepare_capabilities(&connection->acceptor_signaling_packet, trid, stream_endpoint->sep.registered_service_categories, stream_endpoint->sep.capabilities, AVDTP_SI_GET_ALL_CAPABILITIES); 586 l2cap_reserve_packet_buffer(); 587 out_buffer = l2cap_get_outgoing_buffer(); 588 pos = avdtp_signaling_create_fragment(cid, &connection->acceptor_signaling_packet, out_buffer); 589 if ((connection->acceptor_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->acceptor_signaling_packet.packet_type != AVDTP_END_PACKET)){ 590 stream_endpoint->acceptor_config_state = acceptor_config_state; 591 log_info("fragmented"); 592 } else { 593 log_info("ACP:DONE"); 594 emit_accept = true; 595 } 596 l2cap_send_prepared(cid, pos); 597 break; 598 case AVDTP_ACCEPTOR_W2_ACCEPT_SET_CONFIGURATION: 599 log_info("DONE"); 600 log_info(" -> AVDTP_STREAM_ENDPOINT_CONFIGURED"); 601 stream_endpoint->connection = connection; 602 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED; 603 connection->configuration_state = AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED; 604 // TODO: consider reconfiguration 605 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_SET_CONFIGURATION); 606 emit_accept = true; 607 break; 608 case AVDTP_ACCEPTOR_W2_ACCEPT_RECONFIGURE: 609 log_info("DONE "); 610 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_RECONFIGURE); 611 emit_accept = true; 612 break; 613 614 case AVDTP_ACCEPTOR_W2_ACCEPT_GET_CONFIGURATION:{ 615 avdtp_sep_t sep = stream_endpoint->remote_sep; 616 avdtp_prepare_capabilities(&connection->acceptor_signaling_packet, trid, sep.configured_service_categories, sep.configuration, AVDTP_SI_GET_CONFIGURATION); 617 l2cap_reserve_packet_buffer(); 618 out_buffer = l2cap_get_outgoing_buffer(); 619 pos = avdtp_signaling_create_fragment(cid, &connection->acceptor_signaling_packet, out_buffer); 620 if ((connection->acceptor_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->acceptor_signaling_packet.packet_type != AVDTP_END_PACKET)){ 621 stream_endpoint->acceptor_config_state = acceptor_config_state; 622 log_info("fragmented"); 623 } else { 624 log_info("ACP:DONE"); 625 emit_accept = true; 626 } 627 l2cap_send_prepared(cid, pos); 628 break; 629 } 630 case AVDTP_ACCEPTOR_W2_ACCEPT_OPEN_STREAM: 631 log_info("DONE"); 632 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_OPEN); 633 emit_accept = true; 634 break; 635 636 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 637 case AVDTP_ACCEPTOR_W4_USER_CONFIRM_START_STREAM: 638 // keep state until user calls API to confirm or reject starting the stream 639 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W4_USER_CONFIRM_START_STREAM; 640 avdtp_signaling_emit_accept(connection->avdtp_cid, avdtp_local_seid(stream_endpoint), AVDTP_SI_ACCEPT_START, false); 641 break; 642 case AVDTP_ACCEPTOR_W2_REJECT_START_STREAM: 643 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 644 connection->acceptor_signaling_packet.signal_identifier = AVDTP_SI_START; 645 emit_reject = true; 646 avdtp_acceptor_send_response_reject(cid, AVDTP_SI_START, trid); 647 break; 648 #endif 649 case AVDTP_ACCEPTOR_W2_ACCEPT_START_STREAM: 650 log_info("DONE "); 651 log_info(" -> AVDTP_STREAM_ENDPOINT_STREAMING "); 652 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 653 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_START); 654 emit_accept = true; 655 break; 656 case AVDTP_ACCEPTOR_W2_ACCEPT_CLOSE_STREAM: 657 log_info("DONE"); 658 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_CLOSE); 659 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 660 emit_accept = true; 661 break; 662 case AVDTP_ACCEPTOR_W2_ACCEPT_ABORT_STREAM: 663 log_info("DONE"); 664 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_ABORT); 665 emit_accept = true; 666 break; 667 case AVDTP_ACCEPTOR_W2_ACCEPT_SUSPEND_STREAM: 668 log_info("DONE"); 669 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 670 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_SUSPEND); 671 emit_accept = true; 672 break; 673 case AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD: 674 log_info("DONE REJECT"); 675 connection->reject_signal_identifier = AVDTP_SI_NONE; 676 avdtp_acceptor_send_response_reject(cid, reject_signal_identifier, trid); 677 emit_reject = true; 678 break; 679 case AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE: 680 log_info("DONE REJECT CATEGORY"); 681 connection->reject_service_category = 0; 682 avdtp_acceptor_send_response_reject_service_category(cid, reject_signal_identifier, reject_service_category, error_code, trid); 683 emit_reject = true; 684 break; 685 case AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE: 686 log_info("DONE REJECT"); 687 connection->reject_signal_identifier = AVDTP_SI_NONE; 688 connection->error_code = 0; 689 avdtp_acceptor_send_response_reject_with_error_code(cid, reject_signal_identifier, error_code, trid); 690 emit_reject = true; 691 break; 692 default: 693 log_info("NOT IMPLEMENTED"); 694 sent = 0; 695 break; 696 } 697 698 if (emit_accept == true){ 699 avdtp_signaling_emit_accept(connection->avdtp_cid, avdtp_local_seid(stream_endpoint), 700 connection->acceptor_signaling_packet.signal_identifier, false); 701 } else if (emit_reject == true){ 702 avdtp_signaling_emit_reject(connection->avdtp_cid, avdtp_local_seid(stream_endpoint), 703 connection->acceptor_signaling_packet.signal_identifier, false); 704 } 705 // check fragmentation 706 if ((connection->acceptor_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->acceptor_signaling_packet.packet_type != AVDTP_END_PACKET)){ 707 avdtp_request_can_send_now_acceptor(connection); 708 } 709 } 710