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 #include <stdint.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 43 #include "btstack.h" 44 #include "classic/avdtp.h" 45 #include "classic/avdtp_util.h" 46 #include "classic/avdtp_acceptor.h" 47 48 49 static int avdtp_acceptor_send_accept_response(uint16_t cid, uint8_t transaction_label, avdtp_signal_identifier_t identifier){ 50 uint8_t command[2]; 51 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_ACCEPT_MSG); 52 command[1] = (uint8_t)identifier; 53 return l2cap_send(cid, command, sizeof(command)); 54 } 55 56 static int avdtp_acceptor_process_chunk(avdtp_signaling_packet_t * signaling_packet, uint8_t * packet, uint16_t size){ 57 memcpy(signaling_packet->command + signaling_packet->size, packet, size); 58 signaling_packet->size += size; 59 return signaling_packet->packet_type == AVDTP_SINGLE_PACKET || signaling_packet->packet_type == AVDTP_END_PACKET; 60 } 61 62 static int avdtp_acceptor_validate_msg_length(avdtp_signal_identifier_t signal_identifier, uint16_t msg_size){ 63 int minimal_msg_lenght = 2; 64 switch (signal_identifier){ 65 case AVDTP_SI_GET_CAPABILITIES: 66 case AVDTP_SI_GET_ALL_CAPABILITIES: 67 case AVDTP_SI_SET_CONFIGURATION: 68 case AVDTP_SI_GET_CONFIGURATION: 69 case AVDTP_SI_START: 70 case AVDTP_SI_CLOSE: 71 case AVDTP_SI_ABORT: 72 case AVDTP_SI_RECONFIGURE: 73 case AVDTP_SI_OPEN: 74 minimal_msg_lenght = 3; 75 break; 76 default: 77 break; 78 } 79 return msg_size >= minimal_msg_lenght; 80 } 81 82 void avdtp_acceptor_stream_config_subsm(avdtp_connection_t * connection, uint8_t * packet, uint16_t size, int offset, avdtp_context_t * context){ 83 avdtp_stream_endpoint_t * stream_endpoint; 84 connection->acceptor_transaction_label = connection->signaling_packet.transaction_label; 85 86 if (!avdtp_acceptor_validate_msg_length(connection->signaling_packet.signal_identifier, size)) { 87 connection->error_code = BAD_LENGTH; 88 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 89 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 90 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 91 return; 92 } 93 94 switch (connection->signaling_packet.signal_identifier){ 95 case AVDTP_SI_DISCOVER: 96 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 97 log_info(" ACP: AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS"); 98 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS; 99 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 100 return; 101 case AVDTP_SI_GET_CAPABILITIES: 102 case AVDTP_SI_GET_ALL_CAPABILITIES: 103 case AVDTP_SI_SET_CONFIGURATION: 104 case AVDTP_SI_GET_CONFIGURATION: 105 case AVDTP_SI_START: 106 case AVDTP_SI_CLOSE: 107 case AVDTP_SI_ABORT: 108 case AVDTP_SI_OPEN: 109 case AVDTP_SI_RECONFIGURE: 110 connection->query_seid = packet[offset++] >> 2; 111 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->query_seid, context); 112 if (!stream_endpoint){ 113 log_info(" ACP: cmd %d - RESPONSE REJECT", connection->signaling_packet.signal_identifier); 114 connection->error_code = BAD_ACP_SEID; 115 if (connection->signaling_packet.signal_identifier == AVDTP_SI_OPEN){ 116 connection->error_code = BAD_STATE; 117 } 118 119 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 120 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 121 connection->reject_service_category = connection->query_seid; 122 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 123 } 124 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 125 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 126 return; 127 } 128 break; 129 130 case AVDTP_SI_SUSPEND:{ 131 int i; 132 log_info(" ACP: AVDTP_SI_SUSPEND seids: "); 133 connection->num_suspended_seids = 0; 134 135 for (i = offset; i < size; i++){ 136 connection->suspended_seids[connection->num_suspended_seids] = packet[i] >> 2; 137 offset++; 138 log_info("%d, ", connection->suspended_seids[connection->num_suspended_seids]); 139 connection->num_suspended_seids++; 140 } 141 142 if (connection->num_suspended_seids == 0) { 143 log_info(" ACP: CATEGORY RESPONSE REJECT BAD_ACP_SEID"); 144 connection->error_code = BAD_ACP_SEID; 145 connection->reject_service_category = connection->query_seid; 146 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 147 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 148 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 149 return; 150 } 151 // deal with first susspended seid 152 connection->query_seid = connection->suspended_seids[0]; 153 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->query_seid, context); 154 if (!stream_endpoint){ 155 log_info(" ACP: stream_endpoint not found, CATEGORY RESPONSE REJECT BAD_ACP_SEID"); 156 connection->error_code = BAD_ACP_SEID; 157 connection->reject_service_category = connection->query_seid; 158 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 159 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 160 connection->num_suspended_seids = 0; 161 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 162 return; 163 } 164 break; 165 } 166 default: 167 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE; 168 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 169 log_info("AVDTP_CMD_MSG signal %d not implemented, general reject", connection->signaling_packet.signal_identifier); 170 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 171 return; 172 } 173 174 if (!stream_endpoint) { 175 return; 176 } 177 178 if (!avdtp_acceptor_process_chunk(&connection->signaling_packet, packet, size)) return; 179 180 uint16_t packet_size = connection->signaling_packet.size; 181 connection->signaling_packet.size = 0; 182 183 int request_to_send = 1; 184 switch (stream_endpoint->acceptor_config_state){ 185 case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE: 186 switch (connection->signaling_packet.signal_identifier){ 187 case AVDTP_SI_GET_ALL_CAPABILITIES: 188 log_info(" ACP: AVDTP_SI_GET_ALL_CAPABILITIES"); 189 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES; 190 break; 191 case AVDTP_SI_GET_CAPABILITIES: 192 log_info(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES"); 193 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES; 194 break; 195 case AVDTP_SI_SET_CONFIGURATION:{ 196 log_info(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION "); 197 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION; 198 connection->reject_service_category = 0; 199 stream_endpoint->connection = connection; 200 avdtp_sep_t sep; 201 sep.seid = connection->signaling_packet.command[offset++] >> 2; 202 sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, connection->signaling_packet.command+offset, packet_size-offset); 203 sep.in_use = 1; 204 205 if (connection->error_code){ 206 log_info("fire configuration parsing errors "); 207 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 208 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 209 break; 210 } 211 // find or add sep 212 213 stream_endpoint->remote_sep_index = avdtp_find_remote_sep(stream_endpoint->connection, sep.seid); 214 log_info(" ACP .. seid %d, index %d", sep.seid, stream_endpoint->remote_sep_index); 215 216 if (stream_endpoint->remote_sep_index != AVDTP_INVALID_SEP_INDEX){ 217 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].in_use){ 218 // reject if already configured 219 connection->error_code = SEP_IN_USE; 220 // find first registered category and fire the error 221 connection->reject_service_category = 0; 222 int i; 223 for (i = 1; i < 9; i++){ 224 if (get_bit16(sep.configured_service_categories, i)){ 225 connection->reject_service_category = i; 226 break; 227 } 228 } 229 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 230 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 231 } else { 232 stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 233 log_info(" ACP: update seid %d, to %p", stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 234 } 235 } else { 236 // add new 237 log_info(" ACP: seid %d not found in %p", sep.seid, stream_endpoint); 238 stream_endpoint->remote_sep_index = connection->remote_seps_num; 239 connection->remote_seps_num++; 240 connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 241 log_info(" ACP: add seid %d, to %p", connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 242 } 243 if (get_bit16(sep.configured_service_categories, AVDTP_MEDIA_CODEC)){ 244 switch (sep.configuration.media_codec.media_codec_type){ 245 case AVDTP_CODEC_SBC: 246 avdtp_signaling_emit_media_codec_sbc_configuration(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->acp_seid, sep.configuration.media_codec); 247 break; 248 default: 249 avdtp_signaling_emit_media_codec_other_configuration(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->acp_seid, sep.configuration.media_codec); 250 break; 251 } 252 } 253 avdtp_signaling_emit_accept(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->signaling_packet.signal_identifier, 0); 254 break; 255 } 256 case AVDTP_SI_RECONFIGURE:{ 257 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE; 258 connection->reject_service_category = 0; 259 260 avdtp_sep_t sep; 261 sep.seid = connection->query_seid; 262 log_info(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE seid %d", sep.seid); 263 // log_info_hexdump(connection->signaling_packet.command, packet_size); 264 265 sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, connection->signaling_packet.command+offset, packet_size-offset); 266 267 if (connection->error_code){ 268 // fire configuration parsing errors 269 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 270 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 271 break; 272 } 273 274 // find sep or raise error 275 276 stream_endpoint->remote_sep_index = avdtp_find_remote_sep(stream_endpoint->connection, sep.seid); 277 if (stream_endpoint->remote_sep_index == AVDTP_INVALID_SEP_INDEX){ 278 log_info(" ACP: REJECT AVDTP_SI_RECONFIGURE, BAD_ACP_SEID"); 279 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 280 connection->error_code = BAD_ACP_SEID; 281 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 282 break; 283 } 284 stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 285 log_info(" ACP: update seid %d, to %p", stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 286 287 if (get_bit16(sep.configured_service_categories, AVDTP_MEDIA_CODEC)){ 288 switch (sep.capabilities.media_codec.media_codec_type){ 289 case AVDTP_CODEC_SBC: 290 avdtp_signaling_emit_media_codec_sbc_reconfiguration(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->acp_seid, sep.capabilities.media_codec); 291 break; 292 default: 293 avdtp_signaling_emit_media_codec_other_reconfiguration(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->acp_seid, sep.capabilities.media_codec); 294 break; 295 } 296 } 297 avdtp_signaling_emit_accept(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->signaling_packet.signal_identifier, 0); 298 break; 299 } 300 301 case AVDTP_SI_GET_CONFIGURATION: 302 log_info(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION"); 303 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION; 304 break; 305 case AVDTP_SI_OPEN: 306 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_CONFIGURED){ 307 log_info(" ACP: REJECT AVDTP_SI_OPEN, BAD_STATE"); 308 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 309 connection->error_code = BAD_STATE; 310 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 311 break; 312 } 313 log_info(" ACP: AVDTP_STREAM_ENDPOINT_W2_ANSWER_OPEN_STREAM"); 314 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM; 315 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED; 316 connection->query_seid = stream_endpoint->sep.seid; 317 break; 318 case AVDTP_SI_START: 319 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_OPENED){ 320 log_info(" ACP: REJECT AVDTP_SI_START, BAD_STATE"); 321 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 322 connection->error_code = BAD_STATE; 323 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 324 break; 325 } 326 log_info(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM"); 327 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM; 328 break; 329 case AVDTP_SI_CLOSE: 330 switch (stream_endpoint->state){ 331 case AVDTP_STREAM_ENDPOINT_OPENED: 332 case AVDTP_STREAM_ENDPOINT_STREAMING: 333 log_info(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM"); 334 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING; 335 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM; 336 break; 337 default: 338 log_info(" ACP: AVDTP_SI_CLOSE, bad state %d ", stream_endpoint->state); 339 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 340 connection->error_code = BAD_STATE; 341 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 342 break; 343 } 344 break; 345 case AVDTP_SI_ABORT: 346 switch (stream_endpoint->state){ 347 case AVDTP_STREAM_ENDPOINT_CONFIGURED: 348 case AVDTP_STREAM_ENDPOINT_CLOSING: 349 case AVDTP_STREAM_ENDPOINT_OPENED: 350 case AVDTP_STREAM_ENDPOINT_STREAMING: 351 log_info(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM"); 352 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 353 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM; 354 break; 355 default: 356 log_info(" ACP: AVDTP_SI_ABORT, bad state %d ", stream_endpoint->state); 357 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 358 connection->error_code = BAD_STATE; 359 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 360 break; 361 } 362 break; 363 case AVDTP_SI_SUSPEND: 364 log_info(" entering AVDTP_SI_SUSPEND"); 365 switch (stream_endpoint->state){ 366 case AVDTP_STREAM_ENDPOINT_OPENED: 367 case AVDTP_STREAM_ENDPOINT_STREAMING: 368 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 369 connection->num_suspended_seids--; 370 if (connection->num_suspended_seids <= 0){ 371 log_info(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM"); 372 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM; 373 } 374 break; 375 default: 376 log_info(" ACP: AVDTP_SI_SUSPEND, bad state "); 377 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 378 connection->error_code = BAD_STATE; 379 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 380 break; 381 } 382 383 //stream_endpoint->state = AVDTP_STREAM_ENDPOINT_SUSPENDING; 384 //stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_SUSPEND_STREAM; 385 break; 386 default: 387 log_info(" ACP: NOT IMPLEMENTED, Reject signal_identifier %02x", connection->signaling_packet.signal_identifier); 388 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD; 389 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 390 break; 391 } 392 break; 393 default: 394 return; 395 } 396 397 if (!request_to_send){ 398 log_info(" ACP: NOT IMPLEMENTED"); 399 } 400 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 401 } 402 403 static int avdtp_acceptor_send_seps_response(uint16_t cid, uint8_t transaction_label, avdtp_stream_endpoint_t * endpoints){ 404 uint8_t command[2+2*MAX_NUM_SEPS]; 405 int pos = 0; 406 command[pos++] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_ACCEPT_MSG); 407 command[pos++] = (uint8_t)AVDTP_SI_DISCOVER; 408 409 btstack_linked_list_iterator_t it; 410 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) endpoints); 411 while (btstack_linked_list_iterator_has_next(&it)){ 412 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 413 command[pos++] = (stream_endpoint->sep.seid << 2) | (stream_endpoint->sep.in_use<<1); 414 command[pos++] = (stream_endpoint->sep.media_type << 4) | (stream_endpoint->sep.type << 3); 415 } 416 return l2cap_send(cid, command, pos); 417 } 418 419 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){ 420 uint8_t command[4]; 421 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 422 command[1] = (uint8_t)identifier; 423 command[2] = category; 424 command[3] = error_code; 425 return l2cap_send(cid, command, sizeof(command)); 426 } 427 428 static int avdtp_acceptor_send_response_general_reject(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 429 uint8_t command[2]; 430 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_GENERAL_REJECT_MSG); 431 command[1] = (uint8_t)identifier; 432 return l2cap_send(cid, command, sizeof(command)); 433 } 434 435 static int avdtp_acceptor_send_response_reject(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 436 uint8_t command[2]; 437 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 438 command[1] = (uint8_t)identifier; 439 return l2cap_send(cid, command, sizeof(command)); 440 } 441 442 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){ 443 uint8_t command[3]; 444 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 445 command[1] = (uint8_t)identifier; 446 command[2] = error_code; 447 return l2cap_send(cid, command, sizeof(command)); 448 } 449 450 void avdtp_acceptor_stream_config_subsm_run(avdtp_connection_t * connection, avdtp_context_t * context){ 451 int sent = 1; 452 btstack_linked_list_t * stream_endpoints = &context->stream_endpoints; 453 454 switch (connection->acceptor_connection_state){ 455 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS: 456 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 457 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 458 avdtp_acceptor_send_seps_response(connection->l2cap_signaling_cid, connection->acceptor_transaction_label, (avdtp_stream_endpoint_t *) stream_endpoints); 459 break; 460 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE: 461 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 462 avdtp_acceptor_send_response_reject_with_error_code(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->error_code, connection->acceptor_transaction_label); 463 break; 464 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE: 465 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 466 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); 467 break; 468 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE: 469 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 470 avdtp_acceptor_send_response_general_reject(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->acceptor_transaction_label); 471 break; 472 default: 473 sent = 0; 474 break; 475 } 476 if (sent){ 477 log_info(" ACP: DONE"); 478 return; 479 } 480 481 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(connection->query_seid, context); 482 if (!stream_endpoint) return; 483 484 uint8_t reject_service_category = connection->reject_service_category; 485 avdtp_signal_identifier_t reject_signal_identifier = connection->reject_signal_identifier; 486 uint8_t error_code = connection->error_code; 487 uint16_t cid = stream_endpoint->connection ? stream_endpoint->connection->l2cap_signaling_cid : connection->l2cap_signaling_cid; 488 uint8_t trid = stream_endpoint->connection ? stream_endpoint->connection->acceptor_transaction_label : connection->acceptor_transaction_label; 489 490 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state = stream_endpoint->acceptor_config_state; 491 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 492 uint8_t * out_buffer; 493 uint16_t pos; 494 495 int status = 0; 496 switch (acceptor_config_state){ 497 case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE: 498 break; 499 case AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES: 500 avdtp_prepare_capabilities(&connection->signaling_packet, trid, stream_endpoint->sep.registered_service_categories, stream_endpoint->sep.capabilities, AVDTP_SI_GET_CAPABILITIES); 501 l2cap_reserve_packet_buffer(); 502 out_buffer = l2cap_get_outgoing_buffer(); 503 pos = avdtp_signaling_create_fragment(cid, &connection->signaling_packet, out_buffer); 504 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 505 stream_endpoint->acceptor_config_state = acceptor_config_state; 506 log_info(" ACP: fragmented"); 507 } else { 508 log_info(" ACP:DONE"); 509 } 510 l2cap_send_prepared(cid, pos); 511 break; 512 case AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES: 513 avdtp_prepare_capabilities(&connection->signaling_packet, trid, stream_endpoint->sep.registered_service_categories, stream_endpoint->sep.capabilities, AVDTP_SI_GET_ALL_CAPABILITIES); 514 l2cap_reserve_packet_buffer(); 515 out_buffer = l2cap_get_outgoing_buffer(); 516 pos = avdtp_signaling_create_fragment(cid, &connection->signaling_packet, out_buffer); 517 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 518 stream_endpoint->acceptor_config_state = acceptor_config_state; 519 log_info(" ACP: fragmented"); 520 } else { 521 log_info(" ACP:DONE"); 522 } 523 l2cap_send_prepared(cid, pos); 524 break; 525 case AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION: 526 log_info(" ACP: DONE"); 527 log_info(" -> AVDTP_STREAM_ENDPOINT_CONFIGURED"); 528 stream_endpoint->connection = connection; 529 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED; 530 // TODO: consider reconfiguration 531 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_SET_CONFIGURATION); 532 break; 533 case AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE: 534 log_info(" ACP: DONE "); 535 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_RECONFIGURE); 536 break; 537 538 case AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION:{ 539 avdtp_sep_t sep = stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index]; 540 avdtp_prepare_capabilities(&connection->signaling_packet, trid, sep.configured_service_categories, sep.configuration, AVDTP_SI_GET_CONFIGURATION); 541 l2cap_reserve_packet_buffer(); 542 out_buffer = l2cap_get_outgoing_buffer(); 543 pos = avdtp_signaling_create_fragment(cid, &connection->signaling_packet, out_buffer); 544 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 545 stream_endpoint->acceptor_config_state = acceptor_config_state; 546 log_info(" ACP: fragmented"); 547 } else { 548 log_info(" ACP:DONE"); 549 } 550 l2cap_send_prepared(cid, pos); 551 break; 552 } 553 case AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM: 554 log_info(" ACP: DONE"); 555 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_OPEN); 556 break; 557 case AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM: 558 log_info(" ACP: DONE "); 559 log_info(" -> AVDTP_STREAM_ENDPOINT_STREAMING "); 560 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 561 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_START); 562 break; 563 case AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM: 564 log_info(" ACP: DONE"); 565 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_CLOSE); 566 break; 567 case AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM: 568 log_info(" ACP: DONE"); 569 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_ABORT); 570 break; 571 case AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM: 572 log_info(" ACP: DONE"); 573 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 574 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_SUSPEND); 575 break; 576 case AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD: 577 status = 1; 578 log_info(" ACP: DONE REJECT"); 579 connection->reject_signal_identifier = AVDTP_SI_NONE; 580 avdtp_acceptor_send_response_reject(cid, reject_signal_identifier, trid); 581 break; 582 case AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE: 583 status = 1; 584 log_info(" ACP: DONE REJECT CATEGORY"); 585 connection->reject_service_category = 0; 586 avdtp_acceptor_send_response_reject_service_category(cid, reject_signal_identifier, reject_service_category, error_code, trid); 587 break; 588 589 case AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE: 590 status = 1; 591 log_info(" ACP: DONE REJECT"); 592 connection->reject_signal_identifier = AVDTP_SI_NONE; 593 connection->error_code = 0; 594 avdtp_acceptor_send_response_reject_with_error_code(cid, reject_signal_identifier, error_code, trid); 595 break; 596 default: 597 status = 0; 598 log_info(" ACP: NOT IMPLEMENTED"); 599 sent = 0; 600 } 601 avdtp_signaling_emit_accept(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->signaling_packet.signal_identifier, status); 602 603 // check fragmentation 604 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 605 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 606 } 607 } 608