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 // update media codec info to point to user configuration 169 stream_endpoint->remote_sep.configuration.media_codec.media_codec_information = stream_endpoint->media_codec_configuration_info; 170 // emit event 171 avdtp_signaling_emit_configuration(stream_endpoint, connection->avdtp_cid, 0, &sep.configuration, sep.configured_service_categories); 172 } 173 } 174 175 avdtp_signaling_emit_accept(connection->avdtp_cid, avdtp_local_seid(stream_endpoint), 176 connection->acceptor_signaling_packet.signal_identifier, false); 177 } 178 179 void avdtp_acceptor_stream_config_subsm(avdtp_connection_t *connection, uint8_t *packet, uint16_t size, int offset) { 180 avdtp_stream_endpoint_t * stream_endpoint = NULL; 181 connection->acceptor_transaction_label = connection->acceptor_signaling_packet.transaction_label; 182 if (!avdtp_acceptor_validate_msg_length(connection->acceptor_signaling_packet.signal_identifier, size)) { 183 connection->error_code = AVDTP_ERROR_CODE_BAD_LENGTH; 184 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 185 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 186 avdtp_request_can_send_now_acceptor(connection); 187 return; 188 } 189 190 // handle error cases 191 switch (connection->acceptor_signaling_packet.signal_identifier){ 192 case AVDTP_SI_DISCOVER: 193 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 194 log_info("W2_ANSWER_DISCOVER_SEPS"); 195 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS; 196 avdtp_request_can_send_now_acceptor(connection); 197 return; 198 case AVDTP_SI_GET_CAPABILITIES: 199 case AVDTP_SI_GET_ALL_CAPABILITIES: 200 case AVDTP_SI_SET_CONFIGURATION: 201 case AVDTP_SI_GET_CONFIGURATION: 202 case AVDTP_SI_START: 203 case AVDTP_SI_CLOSE: 204 case AVDTP_SI_ABORT: 205 case AVDTP_SI_OPEN: 206 case AVDTP_SI_RECONFIGURE: 207 case AVDTP_SI_DELAYREPORT: 208 connection->acceptor_local_seid = packet[offset++] >> 2; 209 stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->acceptor_local_seid); 210 if (!stream_endpoint){ 211 log_info("cmd %d - REJECT", connection->acceptor_signaling_packet.signal_identifier); 212 connection->error_code = AVDTP_ERROR_CODE_BAD_ACP_SEID; 213 if (connection->acceptor_signaling_packet.signal_identifier == AVDTP_SI_OPEN){ 214 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 215 } 216 217 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 218 if (connection->acceptor_signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 219 connection->reject_service_category = connection->acceptor_local_seid; 220 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 221 } 222 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 223 avdtp_request_can_send_now_acceptor(connection); 224 return; 225 } 226 break; 227 228 case AVDTP_SI_SUSPEND:{ 229 int i; 230 log_info("AVDTP_SI_SUSPEND"); 231 connection->num_suspended_seids = 0; 232 233 for (i = offset; i < size; i++){ 234 connection->suspended_seids[connection->num_suspended_seids] = packet[i] >> 2; 235 offset++; 236 log_info("%d, ", connection->suspended_seids[connection->num_suspended_seids]); 237 connection->num_suspended_seids++; 238 } 239 240 if (connection->num_suspended_seids == 0) { 241 log_info("no susspended seids, BAD_ACP_SEID"); 242 connection->error_code = AVDTP_ERROR_CODE_BAD_ACP_SEID; 243 connection->reject_service_category = connection->acceptor_local_seid; 244 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 245 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 246 avdtp_request_can_send_now_acceptor(connection); 247 return; 248 } 249 // deal with first susspended seid 250 connection->acceptor_local_seid = connection->suspended_seids[0]; 251 stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->acceptor_local_seid); 252 if (!stream_endpoint){ 253 log_info("stream_endpoint not found, BAD_ACP_SEID"); 254 connection->error_code = AVDTP_ERROR_CODE_BAD_ACP_SEID; 255 connection->reject_service_category = connection->acceptor_local_seid; 256 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 257 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 258 connection->num_suspended_seids = 0; 259 avdtp_request_can_send_now_acceptor(connection); 260 return; 261 } 262 break; 263 } 264 default: 265 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE; 266 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 267 log_info("AVDTP_CMD_MSG signal %d not implemented, general reject", connection->acceptor_signaling_packet.signal_identifier); 268 avdtp_request_can_send_now_acceptor(connection); 269 return; 270 } 271 272 btstack_assert(stream_endpoint != NULL); 273 274 bool command_complete = avdtp_acceptor_process_chunk(&connection->acceptor_signaling_packet, packet, size); 275 if (!command_complete) return; 276 277 uint16_t packet_size = connection->acceptor_signaling_packet.size; 278 connection->acceptor_signaling_packet.size = 0; 279 280 int request_to_send = 1; 281 switch (stream_endpoint->acceptor_config_state){ 282 case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE: 283 switch (connection->acceptor_signaling_packet.signal_identifier){ 284 case AVDTP_SI_DELAYREPORT: 285 log_info("W2_ANSWER_DELAY_REPORT, local seid %d", connection->acceptor_local_seid); 286 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_DELAY_REPORT; 287 avdtp_signaling_emit_delay(connection->avdtp_cid, connection->acceptor_local_seid, 288 big_endian_read_16(packet, offset)); 289 break; 290 291 case AVDTP_SI_GET_ALL_CAPABILITIES: 292 log_info("AVDTP_SI_GET_ALL_CAPABILITIES, local seid %d", connection->acceptor_local_seid); 293 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_GET_ALL_CAPABILITIES; 294 break; 295 case AVDTP_SI_GET_CAPABILITIES: 296 log_info("W2_ANSWER_GET_CAPABILITIES, local seid %d", connection->acceptor_local_seid); 297 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_GET_CAPABILITIES; 298 break; 299 case AVDTP_SI_SET_CONFIGURATION:{ 300 log_info("Received SET_CONFIGURATION cmd: config state %d", connection->configuration_state); 301 switch (connection->configuration_state){ 302 case AVDTP_CONFIGURATION_STATE_IDLE: 303 avdtp_acceptor_handle_configuration_command(connection, offset, packet_size, 304 stream_endpoint); 305 connection->configuration_state = AVDTP_CONFIGURATION_STATE_REMOTE_INITIATED; 306 break; 307 case AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED: 308 case AVDTP_CONFIGURATION_STATE_REMOTE_INITIATED: 309 log_info("Reject SET_CONFIGURATION BAD_STATE %d", connection->configuration_state); 310 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 311 connection->reject_service_category = 0; 312 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 313 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 314 break; 315 case AVDTP_CONFIGURATION_STATE_LOCAL_CONFIGURED: 316 case AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED: 317 log_info("Reject SET_CONFIGURATION SEP_IN_USE"); 318 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 319 connection->reject_service_category = 0; 320 connection->error_code = AVDTP_ERROR_CODE_SEP_IN_USE; 321 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 322 break; 323 default: 324 break; 325 } 326 break; 327 } 328 case AVDTP_SI_RECONFIGURE:{ 329 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_RECONFIGURE; 330 connection->reject_service_category = 0; 331 332 avdtp_sep_t sep; 333 log_info("W2_ANSWER_RECONFIGURE, local seid %d, remote seid %d", connection->acceptor_local_seid, stream_endpoint->remote_sep.seid); 334 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); 335 if (connection->error_code){ 336 // fire configuration parsing errors 337 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 338 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 339 break; 340 } 341 342 // find sep or raise error 343 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 344 log_info("REJECT AVDTP_SI_RECONFIGURE, BAD_ACP_SEID"); 345 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 346 connection->error_code = AVDTP_ERROR_CODE_BAD_ACP_SEID; 347 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 348 break; 349 } 350 stream_endpoint->remote_sep.configured_service_categories = sep.configured_service_categories; 351 stream_endpoint->remote_sep.configuration = sep.configuration; 352 353 log_info("update active remote seid %d", stream_endpoint->remote_sep.seid); 354 355 // if media codec configuration updated, copy configuration and emit event 356 if ((sep.configured_service_categories & (1 << AVDTP_MEDIA_CODEC)) != 0){ 357 if (stream_endpoint->media_codec_configuration_len == sep.configuration.media_codec.media_codec_information_len){ 358 (void) memcpy(stream_endpoint->media_codec_configuration_info, sep.configuration.media_codec.media_codec_information, stream_endpoint->media_codec_configuration_len); 359 stream_endpoint->sep.configuration.media_codec = stream_endpoint->remote_configuration.media_codec; 360 avdtp_signaling_emit_configuration(stream_endpoint, connection->avdtp_cid, 1, &sep.configuration, sep.configured_service_categories); 361 } 362 } 363 break; 364 } 365 366 case AVDTP_SI_GET_CONFIGURATION: 367 log_info("W2_ANSWER_GET_CONFIGURATION"); 368 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_GET_CONFIGURATION; 369 break; 370 case AVDTP_SI_OPEN: 371 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_CONFIGURED){ 372 log_info("REJECT AVDTP_SI_OPEN, BAD_STATE"); 373 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 374 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 375 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 376 break; 377 } 378 log_info("AVDTP_STREAM_ENDPOINT_W2_ANSWER_OPEN_STREAM"); 379 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_OPEN_STREAM; 380 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED; 381 connection->acceptor_local_seid = stream_endpoint->sep.seid; 382 break; 383 case AVDTP_SI_START: 384 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_OPENED){ 385 log_info("REJECT AVDTP_SI_START, BAD_STATE, state %d", stream_endpoint->state); 386 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 387 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 388 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 389 break; 390 } 391 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 392 log_info("W2_ACCEPT_START_STREAM"); 393 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W4_USER_CONFIRM_START_STREAM; 394 #else 395 log_info("W2_ANSWER_START_STREAM"); 396 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_START_STREAM; 397 #endif 398 break; 399 case AVDTP_SI_CLOSE: 400 switch (stream_endpoint->state){ 401 case AVDTP_STREAM_ENDPOINT_OPENED: 402 case AVDTP_STREAM_ENDPOINT_STREAMING: 403 log_info("W2_ANSWER_CLOSE_STREAM"); 404 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING; 405 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_CLOSE_STREAM; 406 break; 407 default: 408 log_info("AVDTP_SI_CLOSE, bad state %d ", stream_endpoint->state); 409 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 410 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 411 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 412 break; 413 } 414 break; 415 case AVDTP_SI_ABORT: 416 switch (stream_endpoint->state){ 417 case AVDTP_STREAM_ENDPOINT_CONFIGURED: 418 case AVDTP_STREAM_ENDPOINT_CLOSING: 419 case AVDTP_STREAM_ENDPOINT_OPENED: 420 case AVDTP_STREAM_ENDPOINT_STREAMING: 421 log_info("W2_ANSWER_ABORT_STREAM"); 422 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 423 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_ABORT_STREAM; 424 break; 425 default: 426 log_info("AVDTP_SI_ABORT, bad state %d ", stream_endpoint->state); 427 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 428 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 429 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 430 break; 431 } 432 break; 433 case AVDTP_SI_SUSPEND: 434 switch (stream_endpoint->state){ 435 case AVDTP_STREAM_ENDPOINT_STREAMING: 436 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 437 connection->num_suspended_seids--; 438 if (connection->num_suspended_seids <= 0){ 439 log_info("W2_ANSWER_SUSPEND_STREAM"); 440 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_SUSPEND_STREAM; 441 } 442 break; 443 default: 444 log_info("AVDTP_SI_SUSPEND, bad state %d", stream_endpoint->state); 445 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 446 connection->error_code = AVDTP_ERROR_CODE_BAD_STATE; 447 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 448 break; 449 } 450 break; 451 default: 452 log_info("NOT IMPLEMENTED, Reject signal_identifier %02x", connection->acceptor_signaling_packet.signal_identifier); 453 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD; 454 connection->reject_signal_identifier = connection->acceptor_signaling_packet.signal_identifier; 455 break; 456 } 457 break; 458 default: 459 return; 460 } 461 462 if (!request_to_send){ 463 log_info("NOT IMPLEMENTED"); 464 } 465 avdtp_request_can_send_now_acceptor(connection); 466 } 467 468 static int avdtp_acceptor_send_seps_response(uint16_t cid, uint8_t transaction_label, avdtp_stream_endpoint_t * endpoints){ 469 uint8_t command[2+2*AVDTP_MAX_NUM_SEPS]; 470 int pos = 0; 471 command[pos++] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_ACCEPT_MSG); 472 command[pos++] = (uint8_t)AVDTP_SI_DISCOVER; 473 474 btstack_linked_list_iterator_t it; 475 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) endpoints); 476 while (btstack_linked_list_iterator_has_next(&it)){ 477 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 478 command[pos++] = (stream_endpoint->sep.seid << 2) | (stream_endpoint->sep.in_use<<1); 479 command[pos++] = (stream_endpoint->sep.media_type << 4) | (stream_endpoint->sep.type << 3); 480 } 481 return l2cap_send(cid, command, pos); 482 } 483 484 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){ 485 uint8_t command[4]; 486 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 487 command[1] = (uint8_t)identifier; 488 command[2] = category; 489 command[3] = error_code; 490 return l2cap_send(cid, command, sizeof(command)); 491 } 492 493 static int avdtp_acceptor_send_response_general_reject(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 494 uint8_t command[2]; 495 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_GENERAL_REJECT_MSG); 496 command[1] = (uint8_t)identifier; 497 return l2cap_send(cid, command, sizeof(command)); 498 } 499 500 static int avdtp_acceptor_send_response_reject(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 501 uint8_t command[2]; 502 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 503 command[1] = (uint8_t)identifier; 504 return l2cap_send(cid, command, sizeof(command)); 505 } 506 507 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){ 508 uint8_t command[3]; 509 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 510 command[1] = (uint8_t)identifier; 511 command[2] = error_code; 512 return l2cap_send(cid, command, sizeof(command)); 513 } 514 515 void avdtp_acceptor_stream_config_subsm_run(avdtp_connection_t *connection) { 516 int sent = 1; 517 btstack_linked_list_t * stream_endpoints = avdtp_get_stream_endpoints(); 518 519 switch (connection->acceptor_connection_state){ 520 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS: 521 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 522 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 523 avdtp_acceptor_send_seps_response(connection->l2cap_signaling_cid, connection->acceptor_transaction_label, (avdtp_stream_endpoint_t *) stream_endpoints); 524 avdtp_signaling_emit_accept(connection->avdtp_cid, 0, connection->acceptor_signaling_packet.signal_identifier, false); 525 break; 526 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE: 527 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 528 avdtp_acceptor_send_response_reject_with_error_code(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->error_code, connection->acceptor_transaction_label); 529 break; 530 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE: 531 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 532 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); 533 break; 534 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE: 535 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 536 avdtp_acceptor_send_response_general_reject(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->acceptor_transaction_label); 537 break; 538 default: 539 sent = 0; 540 break; 541 } 542 if (sent){ 543 log_info("DONE"); 544 return; 545 } 546 547 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->acceptor_local_seid); 548 if (!stream_endpoint) return; 549 550 uint8_t reject_service_category = connection->reject_service_category; 551 avdtp_signal_identifier_t reject_signal_identifier = connection->reject_signal_identifier; 552 uint8_t error_code = connection->error_code; 553 uint16_t cid = stream_endpoint->connection ? stream_endpoint->connection->l2cap_signaling_cid : connection->l2cap_signaling_cid; 554 uint8_t trid = stream_endpoint->connection ? stream_endpoint->connection->acceptor_transaction_label : connection->acceptor_transaction_label; 555 556 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state = stream_endpoint->acceptor_config_state; 557 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 558 uint8_t * out_buffer; 559 uint16_t pos; 560 avdtp_sep_t * remote_sep; 561 562 bool emit_accept = false; 563 bool emit_reject = false; 564 565 switch (acceptor_config_state){ 566 case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE: 567 break; 568 case AVDTP_ACCEPTOR_W2_ACCEPT_GET_CAPABILITIES: 569 avdtp_prepare_capabilities(&connection->acceptor_signaling_packet, trid, stream_endpoint->sep.registered_service_categories, stream_endpoint->sep.capabilities, AVDTP_SI_GET_CAPABILITIES); 570 l2cap_reserve_packet_buffer(); 571 out_buffer = l2cap_get_outgoing_buffer(); 572 pos = avdtp_signaling_create_fragment(cid, &connection->acceptor_signaling_packet, out_buffer); 573 if ((connection->acceptor_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->acceptor_signaling_packet.packet_type != AVDTP_END_PACKET)){ 574 stream_endpoint->acceptor_config_state = acceptor_config_state; 575 log_info("fragmented"); 576 } else { 577 log_info("ACP:DONE"); 578 emit_accept = true; 579 } 580 l2cap_send_prepared(cid, pos); 581 break; 582 case AVDTP_ACCEPTOR_W2_ACCEPT_DELAY_REPORT: 583 log_info("DONE "); 584 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_DELAYREPORT); 585 emit_accept = true; 586 break; 587 case AVDTP_ACCEPTOR_W2_ACCEPT_GET_ALL_CAPABILITIES: 588 avdtp_prepare_capabilities(&connection->acceptor_signaling_packet, trid, stream_endpoint->sep.registered_service_categories, stream_endpoint->sep.capabilities, AVDTP_SI_GET_ALL_CAPABILITIES); 589 l2cap_reserve_packet_buffer(); 590 out_buffer = l2cap_get_outgoing_buffer(); 591 pos = avdtp_signaling_create_fragment(cid, &connection->acceptor_signaling_packet, out_buffer); 592 if ((connection->acceptor_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->acceptor_signaling_packet.packet_type != AVDTP_END_PACKET)){ 593 stream_endpoint->acceptor_config_state = acceptor_config_state; 594 log_info("fragmented"); 595 } else { 596 log_info("ACP:DONE"); 597 emit_accept = true; 598 } 599 l2cap_send_prepared(cid, pos); 600 break; 601 case AVDTP_ACCEPTOR_W2_ACCEPT_SET_CONFIGURATION: 602 log_info("DONE"); 603 log_info(" -> AVDTP_STREAM_ENDPOINT_CONFIGURED"); 604 stream_endpoint->connection = connection; 605 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED; 606 connection->configuration_state = AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED; 607 // TODO: consider reconfiguration 608 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_SET_CONFIGURATION); 609 emit_accept = true; 610 break; 611 case AVDTP_ACCEPTOR_W2_ACCEPT_RECONFIGURE: 612 log_info("DONE "); 613 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_RECONFIGURE); 614 emit_accept = true; 615 break; 616 case AVDTP_ACCEPTOR_W2_ACCEPT_GET_CONFIGURATION: 617 remote_sep = &stream_endpoint->remote_sep; 618 avdtp_prepare_capabilities(&connection->acceptor_signaling_packet, trid, remote_sep->configured_service_categories, remote_sep->configuration, AVDTP_SI_GET_CONFIGURATION); 619 l2cap_reserve_packet_buffer(); 620 out_buffer = l2cap_get_outgoing_buffer(); 621 pos = avdtp_signaling_create_fragment(cid, &connection->acceptor_signaling_packet, out_buffer); 622 if ((connection->acceptor_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->acceptor_signaling_packet.packet_type != AVDTP_END_PACKET)){ 623 stream_endpoint->acceptor_config_state = acceptor_config_state; 624 log_info("fragmented"); 625 } else { 626 log_info("ACP:DONE"); 627 emit_accept = true; 628 } 629 l2cap_send_prepared(cid, pos); 630 break; 631 case AVDTP_ACCEPTOR_W2_ACCEPT_OPEN_STREAM: 632 log_info("DONE"); 633 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_OPEN); 634 emit_accept = true; 635 break; 636 637 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 638 case AVDTP_ACCEPTOR_W4_USER_CONFIRM_START_STREAM: 639 // keep state until user calls API to confirm or reject starting the stream 640 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W4_USER_CONFIRM_START_STREAM; 641 avdtp_signaling_emit_accept(connection->avdtp_cid, avdtp_local_seid(stream_endpoint), AVDTP_SI_ACCEPT_START, false); 642 break; 643 case AVDTP_ACCEPTOR_W2_REJECT_START_STREAM: 644 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 645 connection->acceptor_signaling_packet.signal_identifier = AVDTP_SI_START; 646 emit_reject = true; 647 avdtp_acceptor_send_response_reject(cid, AVDTP_SI_START, trid); 648 break; 649 #endif 650 case AVDTP_ACCEPTOR_W2_ACCEPT_START_STREAM: 651 log_info("DONE "); 652 log_info(" -> AVDTP_STREAM_ENDPOINT_STREAMING "); 653 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 654 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_START); 655 emit_accept = true; 656 break; 657 case AVDTP_ACCEPTOR_W2_ACCEPT_CLOSE_STREAM: 658 log_info("DONE"); 659 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_CLOSE); 660 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 661 emit_accept = true; 662 break; 663 case AVDTP_ACCEPTOR_W2_ACCEPT_ABORT_STREAM: 664 log_info("DONE"); 665 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_ABORT); 666 emit_accept = true; 667 break; 668 case AVDTP_ACCEPTOR_W2_ACCEPT_SUSPEND_STREAM: 669 log_info("DONE"); 670 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 671 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_SUSPEND); 672 emit_accept = true; 673 break; 674 case AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD: 675 log_info("DONE REJECT"); 676 connection->reject_signal_identifier = AVDTP_SI_NONE; 677 avdtp_acceptor_send_response_reject(cid, reject_signal_identifier, trid); 678 emit_reject = true; 679 break; 680 case AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE: 681 log_info("DONE REJECT CATEGORY"); 682 connection->reject_service_category = 0; 683 avdtp_acceptor_send_response_reject_service_category(cid, reject_signal_identifier, reject_service_category, error_code, trid); 684 emit_reject = true; 685 break; 686 case AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE: 687 log_info("DONE REJECT"); 688 connection->reject_signal_identifier = AVDTP_SI_NONE; 689 connection->error_code = 0; 690 avdtp_acceptor_send_response_reject_with_error_code(cid, reject_signal_identifier, error_code, trid); 691 emit_reject = true; 692 break; 693 default: 694 log_info("NOT IMPLEMENTED"); 695 sent = 0; 696 break; 697 } 698 699 if (emit_accept == true){ 700 avdtp_signaling_emit_accept(connection->avdtp_cid, avdtp_local_seid(stream_endpoint), 701 connection->acceptor_signaling_packet.signal_identifier, false); 702 } else if (emit_reject == true){ 703 avdtp_signaling_emit_reject(connection->avdtp_cid, avdtp_local_seid(stream_endpoint), 704 connection->acceptor_signaling_packet.signal_identifier, false); 705 } 706 // check fragmentation 707 if ((connection->acceptor_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->acceptor_signaling_packet.packet_type != AVDTP_END_PACKET)){ 708 avdtp_request_can_send_now_acceptor(connection); 709 } 710 } 711