1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "avdtp_acceptor.c" 39 40 41 #include <stdint.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 #include "btstack.h" 48 #include "avdtp.h" 49 #include "avdtp_util.h" 50 #include "avdtp_acceptor.h" 51 52 53 static int avdtp_acceptor_send_accept_response(uint16_t cid, uint8_t transaction_label, avdtp_signal_identifier_t identifier){ 54 uint8_t command[2]; 55 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_ACCEPT_MSG); 56 command[1] = (uint8_t)identifier; 57 return l2cap_send(cid, command, sizeof(command)); 58 } 59 60 static int avdtp_acceptor_process_chunk(avdtp_signaling_packet_t * signaling_packet, uint8_t * packet, uint16_t size){ 61 memcpy(signaling_packet->command + signaling_packet->size, packet, size); 62 signaling_packet->size += size; 63 return signaling_packet->packet_type == AVDTP_SINGLE_PACKET || signaling_packet->packet_type == AVDTP_END_PACKET; 64 } 65 66 static int avdtp_acceptor_validate_msg_length(avdtp_signal_identifier_t signal_identifier, uint16_t msg_size){ 67 int minimal_msg_lenght = 2; 68 switch (signal_identifier){ 69 case AVDTP_SI_GET_CAPABILITIES: 70 case AVDTP_SI_GET_ALL_CAPABILITIES: 71 case AVDTP_SI_SET_CONFIGURATION: 72 case AVDTP_SI_GET_CONFIGURATION: 73 case AVDTP_SI_START: 74 case AVDTP_SI_CLOSE: 75 case AVDTP_SI_ABORT: 76 case AVDTP_SI_RECONFIGURE: 77 case AVDTP_SI_OPEN: 78 minimal_msg_lenght = 3; 79 break; 80 default: 81 break; 82 } 83 return msg_size >= minimal_msg_lenght; 84 } 85 86 void avdtp_acceptor_stream_config_subsm(avdtp_connection_t * connection, uint8_t * packet, uint16_t size, int offset, avdtp_context_t * context){ 87 avdtp_stream_endpoint_t * stream_endpoint; 88 connection->acceptor_transaction_label = connection->signaling_packet.transaction_label; 89 90 if (!avdtp_acceptor_validate_msg_length(connection->signaling_packet.signal_identifier, size)) { 91 connection->error_code = BAD_LENGTH; 92 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 93 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 94 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 95 return; 96 } 97 98 switch (connection->signaling_packet.signal_identifier){ 99 case AVDTP_SI_DISCOVER: 100 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 101 printf(" ACP: AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS\n"); 102 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS; 103 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 104 return; 105 case AVDTP_SI_GET_CAPABILITIES: 106 case AVDTP_SI_GET_ALL_CAPABILITIES: 107 case AVDTP_SI_SET_CONFIGURATION: 108 case AVDTP_SI_GET_CONFIGURATION: 109 case AVDTP_SI_START: 110 case AVDTP_SI_CLOSE: 111 case AVDTP_SI_ABORT: 112 case AVDTP_SI_OPEN: 113 case AVDTP_SI_RECONFIGURE: 114 connection->query_seid = packet[offset++] >> 2; 115 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->query_seid, context); 116 if (!stream_endpoint){ 117 printf(" ACP: cmd %d - RESPONSE REJECT\n", connection->signaling_packet.signal_identifier); 118 connection->error_code = BAD_ACP_SEID; 119 if (connection->signaling_packet.signal_identifier == AVDTP_SI_OPEN){ 120 connection->error_code = BAD_STATE; 121 } 122 123 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 124 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 125 connection->reject_service_category = connection->query_seid; 126 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 127 } 128 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 129 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 130 return; 131 } 132 break; 133 134 case AVDTP_SI_SUSPEND:{ 135 int i; 136 printf(" ACP: AVDTP_SI_SUSPEND seids: "); 137 connection->num_suspended_seids = 0; 138 139 for (i = offset; i < size; i++){ 140 connection->suspended_seids[connection->num_suspended_seids] = packet[i] >> 2; 141 offset++; 142 printf("%d, \n", connection->suspended_seids[connection->num_suspended_seids]); 143 connection->num_suspended_seids++; 144 } 145 146 if (connection->num_suspended_seids == 0) { 147 printf(" ACP: CATEGORY RESPONSE REJECT BAD_ACP_SEID\n"); 148 connection->error_code = BAD_ACP_SEID; 149 connection->reject_service_category = connection->query_seid; 150 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 151 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 152 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 153 return; 154 } 155 // deal with first susspended seid 156 connection->query_seid = connection->suspended_seids[0]; 157 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->query_seid, context); 158 if (!stream_endpoint){ 159 printf(" ACP: stream_endpoint not found, CATEGORY RESPONSE REJECT BAD_ACP_SEID\n"); 160 connection->error_code = BAD_ACP_SEID; 161 connection->reject_service_category = connection->query_seid; 162 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 163 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 164 connection->num_suspended_seids = 0; 165 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 166 return; 167 } 168 break; 169 } 170 default: 171 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE; 172 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 173 printf("AVDTP_CMD_MSG signal %d not implemented, general reject\n", connection->signaling_packet.signal_identifier); 174 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 175 return; 176 } 177 178 if (!stream_endpoint) { 179 return; 180 } 181 182 if (!avdtp_acceptor_process_chunk(&connection->signaling_packet, packet, size)) return; 183 184 uint16_t packet_size = connection->signaling_packet.size; 185 connection->signaling_packet.size = 0; 186 187 int request_to_send = 1; 188 switch (stream_endpoint->acceptor_config_state){ 189 case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE: 190 switch (connection->signaling_packet.signal_identifier){ 191 case AVDTP_SI_GET_ALL_CAPABILITIES: 192 printf(" ACP: AVDTP_SI_GET_ALL_CAPABILITIES\n"); 193 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES; 194 break; 195 case AVDTP_SI_GET_CAPABILITIES: 196 printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES\n"); 197 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES; 198 break; 199 case AVDTP_SI_SET_CONFIGURATION:{ 200 printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION \n"); 201 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION; 202 connection->reject_service_category = 0; 203 stream_endpoint->connection = connection; 204 avdtp_sep_t sep; 205 sep.seid = connection->signaling_packet.command[offset++] >> 2; 206 sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, connection->signaling_packet.command+offset, packet_size-offset); 207 sep.in_use = 1; 208 209 if (connection->error_code){ 210 printf("fire configuration parsing errors \n"); 211 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 212 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 213 break; 214 } 215 // find or add sep 216 stream_endpoint->remote_sep_index = avdtp_find_remote_sep(stream_endpoint->connection, sep.seid); 217 printf(" ACP .. seid %d, index %d\n", sep.seid, stream_endpoint->remote_sep_index); 218 219 if (stream_endpoint->remote_sep_index != 0xFF){ 220 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].in_use){ 221 // reject if already configured 222 connection->error_code = SEP_IN_USE; 223 // find first registered category and fire the error 224 connection->reject_service_category = 0; 225 int i; 226 for (i = 1; i < 9; i++){ 227 if (get_bit16(sep.configured_service_categories, i)){ 228 connection->reject_service_category = i; 229 break; 230 } 231 } 232 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 233 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 234 } else { 235 stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 236 printf(" ACP: update seid %d, to %p\n", stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 237 } 238 } else { 239 // add new 240 printf(" ACP: seid %d not found in %p\n", sep.seid, stream_endpoint); 241 stream_endpoint->remote_sep_index = connection->remote_seps_num; 242 connection->remote_seps_num++; 243 connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 244 printf(" ACP: add seid %d, to %p\n", connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 245 } 246 if (get_bit16(sep.configured_service_categories, AVDTP_MEDIA_CODEC)){ 247 switch (sep.configuration.media_codec.media_codec_type){ 248 case AVDTP_CODEC_SBC: 249 avdtp_signaling_emit_media_codec_sbc_configuration(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->acp_seid, sep.configuration.media_codec); 250 break; 251 default: 252 avdtp_signaling_emit_media_codec_other_configuration(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->acp_seid, sep.configuration.media_codec); 253 break; 254 } 255 } 256 avdtp_signaling_emit_accept(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->signaling_packet.signal_identifier, 0); 257 break; 258 } 259 case AVDTP_SI_RECONFIGURE:{ 260 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE; 261 connection->reject_service_category = 0; 262 263 avdtp_sep_t sep; 264 sep.seid = connection->query_seid; 265 printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE seid %d\n", sep.seid); 266 // printf_hexdump(connection->signaling_packet.command, packet_size); 267 268 sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, connection->signaling_packet.command+offset, packet_size-offset); 269 270 if (connection->error_code){ 271 // fire configuration parsing errors 272 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 273 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 274 break; 275 } 276 277 // find sep or raise error 278 stream_endpoint->remote_sep_index = avdtp_find_remote_sep(stream_endpoint->connection, sep.seid); 279 if (stream_endpoint->remote_sep_index == 0xFF){ 280 printf(" ACP: REJECT AVDTP_SI_RECONFIGURE, BAD_ACP_SEID\n"); 281 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 282 connection->error_code = BAD_ACP_SEID; 283 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 284 break; 285 } 286 stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 287 printf(" ACP: update seid %d, to %p\n", stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 288 289 if (get_bit16(sep.configured_service_categories, AVDTP_MEDIA_CODEC)){ 290 switch (sep.capabilities.media_codec.media_codec_type){ 291 case AVDTP_CODEC_SBC: 292 avdtp_signaling_emit_media_codec_sbc_reconfiguration(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->acp_seid, sep.capabilities.media_codec); 293 break; 294 default: 295 avdtp_signaling_emit_media_codec_other_reconfiguration(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->acp_seid, sep.capabilities.media_codec); 296 break; 297 } 298 } 299 avdtp_signaling_emit_accept(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->signaling_packet.signal_identifier, 0); 300 break; 301 } 302 303 case AVDTP_SI_GET_CONFIGURATION: 304 printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION\n"); 305 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION; 306 break; 307 case AVDTP_SI_OPEN: 308 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_CONFIGURED){ 309 printf(" ACP: REJECT AVDTP_SI_OPEN, BAD_STATE\n"); 310 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 311 connection->error_code = BAD_STATE; 312 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 313 break; 314 } 315 printf(" ACP: AVDTP_STREAM_ENDPOINT_W2_ANSWER_OPEN_STREAM\n"); 316 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM; 317 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED; 318 connection->query_seid = stream_endpoint->sep.seid; 319 break; 320 case AVDTP_SI_START: 321 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_OPENED){ 322 printf(" ACP: REJECT AVDTP_SI_START, BAD_STATE\n"); 323 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 324 connection->error_code = BAD_STATE; 325 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 326 break; 327 } 328 printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM\n"); 329 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM; 330 break; 331 case AVDTP_SI_CLOSE: 332 switch (stream_endpoint->state){ 333 case AVDTP_STREAM_ENDPOINT_OPENED: 334 case AVDTP_STREAM_ENDPOINT_STREAMING: 335 printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM\n"); 336 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING; 337 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM; 338 break; 339 default: 340 printf(" ACP: AVDTP_SI_CLOSE, bad state %d \n", stream_endpoint->state); 341 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 342 connection->error_code = BAD_STATE; 343 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 344 break; 345 } 346 break; 347 case AVDTP_SI_ABORT: 348 switch (stream_endpoint->state){ 349 case AVDTP_STREAM_ENDPOINT_CONFIGURED: 350 case AVDTP_STREAM_ENDPOINT_CLOSING: 351 case AVDTP_STREAM_ENDPOINT_OPENED: 352 case AVDTP_STREAM_ENDPOINT_STREAMING: 353 printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM\n"); 354 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 355 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM; 356 break; 357 default: 358 printf(" ACP: AVDTP_SI_ABORT, bad state %d \n", stream_endpoint->state); 359 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 360 connection->error_code = BAD_STATE; 361 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 362 break; 363 } 364 break; 365 case AVDTP_SI_SUSPEND: 366 printf(" entering AVDTP_SI_SUSPEND\n"); 367 switch (stream_endpoint->state){ 368 case AVDTP_STREAM_ENDPOINT_OPENED: 369 case AVDTP_STREAM_ENDPOINT_STREAMING: 370 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 371 connection->num_suspended_seids--; 372 if (connection->num_suspended_seids <= 0){ 373 printf(" ACP: AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM\n"); 374 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM; 375 } 376 break; 377 default: 378 printf(" ACP: AVDTP_SI_SUSPEND, bad state \n"); 379 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 380 connection->error_code = BAD_STATE; 381 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 382 break; 383 } 384 385 //stream_endpoint->state = AVDTP_STREAM_ENDPOINT_SUSPENDING; 386 //stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_SUSPEND_STREAM; 387 break; 388 default: 389 printf(" ACP: NOT IMPLEMENTED, Reject signal_identifier %02x\n", connection->signaling_packet.signal_identifier); 390 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD; 391 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 392 break; 393 } 394 break; 395 default: 396 return; 397 } 398 399 if (!request_to_send){ 400 printf(" ACP: NOT IMPLEMENTED\n"); 401 } 402 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 403 } 404 405 static int avdtp_acceptor_send_seps_response(uint16_t cid, uint8_t transaction_label, avdtp_stream_endpoint_t * endpoints){ 406 uint8_t command[2+2*MAX_NUM_SEPS]; 407 int pos = 0; 408 command[pos++] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_ACCEPT_MSG); 409 command[pos++] = (uint8_t)AVDTP_SI_DISCOVER; 410 411 btstack_linked_list_iterator_t it; 412 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) endpoints); 413 while (btstack_linked_list_iterator_has_next(&it)){ 414 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 415 command[pos++] = (stream_endpoint->sep.seid << 2) | (stream_endpoint->sep.in_use<<1); 416 command[pos++] = (stream_endpoint->sep.media_type << 4) | (stream_endpoint->sep.type << 3); 417 } 418 return l2cap_send(cid, command, pos); 419 } 420 421 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){ 422 uint8_t command[4]; 423 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 424 command[1] = (uint8_t)identifier; 425 command[2] = category; 426 command[3] = error_code; 427 return l2cap_send(cid, command, sizeof(command)); 428 } 429 430 static int avdtp_acceptor_send_response_general_reject(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 431 uint8_t command[2]; 432 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_GENERAL_REJECT_MSG); 433 command[1] = (uint8_t)identifier; 434 return l2cap_send(cid, command, sizeof(command)); 435 } 436 437 static int avdtp_acceptor_send_response_reject(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 438 uint8_t command[2]; 439 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 440 command[1] = (uint8_t)identifier; 441 return l2cap_send(cid, command, sizeof(command)); 442 } 443 444 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){ 445 uint8_t command[3]; 446 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 447 command[1] = (uint8_t)identifier; 448 command[2] = error_code; 449 return l2cap_send(cid, command, sizeof(command)); 450 } 451 452 void avdtp_acceptor_stream_config_subsm_run(avdtp_connection_t * connection, avdtp_context_t * context){ 453 int sent = 1; 454 btstack_linked_list_t * stream_endpoints = &context->stream_endpoints; 455 456 switch (connection->acceptor_connection_state){ 457 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS: 458 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 459 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 460 avdtp_acceptor_send_seps_response(connection->l2cap_signaling_cid, connection->acceptor_transaction_label, (avdtp_stream_endpoint_t *) stream_endpoints); 461 break; 462 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE: 463 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 464 avdtp_acceptor_send_response_reject_with_error_code(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->error_code, connection->acceptor_transaction_label); 465 break; 466 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE: 467 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 468 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); 469 break; 470 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE: 471 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 472 avdtp_acceptor_send_response_general_reject(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->acceptor_transaction_label); 473 default: 474 sent = 0; 475 break; 476 } 477 if (sent){ 478 printf(" ACP: DONE\n"); 479 return; 480 } 481 482 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(connection->query_seid, context); 483 if (!stream_endpoint) return; 484 485 uint8_t reject_service_category = connection->reject_service_category; 486 avdtp_signal_identifier_t reject_signal_identifier = connection->reject_signal_identifier; 487 uint8_t error_code = connection->error_code; 488 uint16_t cid = stream_endpoint->connection ? stream_endpoint->connection->l2cap_signaling_cid : connection->l2cap_signaling_cid; 489 uint8_t trid = stream_endpoint->connection ? stream_endpoint->connection->acceptor_transaction_label : connection->acceptor_transaction_label; 490 491 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state = stream_endpoint->acceptor_config_state; 492 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 493 uint8_t * out_buffer; 494 uint16_t pos; 495 496 int status = 0; 497 switch (acceptor_config_state){ 498 case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE: 499 break; 500 case AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES: 501 avdtp_prepare_capabilities(&connection->signaling_packet, trid, stream_endpoint->sep.registered_service_categories, stream_endpoint->sep.capabilities, AVDTP_SI_GET_CAPABILITIES); 502 l2cap_reserve_packet_buffer(); 503 out_buffer = l2cap_get_outgoing_buffer(); 504 pos = avdtp_signaling_create_fragment(cid, &connection->signaling_packet, out_buffer); 505 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 506 stream_endpoint->acceptor_config_state = acceptor_config_state; 507 printf(" ACP: fragmented\n"); 508 } else { 509 printf(" ACP:DONE\n"); 510 } 511 l2cap_send_prepared(cid, pos); 512 break; 513 case AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES: 514 avdtp_prepare_capabilities(&connection->signaling_packet, trid, stream_endpoint->sep.registered_service_categories, stream_endpoint->sep.capabilities, AVDTP_SI_GET_ALL_CAPABILITIES); 515 l2cap_reserve_packet_buffer(); 516 out_buffer = l2cap_get_outgoing_buffer(); 517 pos = avdtp_signaling_create_fragment(cid, &connection->signaling_packet, out_buffer); 518 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 519 stream_endpoint->acceptor_config_state = acceptor_config_state; 520 printf(" ACP: fragmented\n"); 521 } else { 522 printf(" ACP:DONE\n"); 523 } 524 l2cap_send_prepared(cid, pos); 525 break; 526 case AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION: 527 printf(" ACP: DONE\n"); 528 printf(" -> AVDTP_STREAM_ENDPOINT_CONFIGURED\n"); 529 stream_endpoint->connection = connection; 530 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED; 531 // TODO: consider reconfiguration 532 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_SET_CONFIGURATION); 533 break; 534 case AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE: 535 printf(" ACP: DONE \n"); 536 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_RECONFIGURE); 537 break; 538 539 case AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION:{ 540 avdtp_sep_t sep = stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index]; 541 avdtp_prepare_capabilities(&connection->signaling_packet, trid, sep.configured_service_categories, sep.configuration, AVDTP_SI_GET_CONFIGURATION); 542 l2cap_reserve_packet_buffer(); 543 out_buffer = l2cap_get_outgoing_buffer(); 544 pos = avdtp_signaling_create_fragment(cid, &connection->signaling_packet, out_buffer); 545 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 546 stream_endpoint->acceptor_config_state = acceptor_config_state; 547 printf(" ACP: fragmented\n"); 548 } else { 549 printf(" ACP:DONE\n"); 550 } 551 l2cap_send_prepared(cid, pos); 552 break; 553 } 554 case AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM: 555 printf(" ACP: DONE\n"); 556 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_OPEN); 557 break; 558 case AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM: 559 printf(" ACP: DONE \n"); 560 printf(" -> AVDTP_STREAM_ENDPOINT_STREAMING \n"); 561 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 562 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_START); 563 break; 564 case AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM: 565 printf(" ACP: DONE\n"); 566 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_CLOSE); 567 break; 568 case AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM: 569 printf(" ACP: DONE\n"); 570 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_ABORT); 571 break; 572 case AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM: 573 printf(" ACP: DONE\n"); 574 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 575 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_SUSPEND); 576 break; 577 case AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD: 578 status = 1; 579 printf(" ACP: DONE REJECT\n"); 580 connection->reject_signal_identifier = 0; 581 avdtp_acceptor_send_response_reject(cid, reject_signal_identifier, trid); 582 break; 583 case AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE: 584 status = 1; 585 printf(" ACP: DONE REJECT CATEGORY\n"); 586 connection->reject_service_category = 0; 587 avdtp_acceptor_send_response_reject_service_category(cid, reject_signal_identifier, reject_service_category, error_code, trid); 588 break; 589 590 case AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE: 591 status = 1; 592 printf(" ACP: DONE REJECT\n"); 593 connection->reject_signal_identifier = 0; 594 connection->error_code = 0; 595 avdtp_acceptor_send_response_reject_with_error_code(cid, reject_signal_identifier, error_code, trid); 596 break; 597 default: 598 status = 0; 599 printf(" ACP: NOT IMPLEMENTED\n"); 600 sent = 0; 601 } 602 avdtp_signaling_emit_accept(context->avdtp_callback, connection->con_handle, connection->int_seid, connection->signaling_packet.signal_identifier, status); 603 604 // check fragmentation 605 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 606 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 607 } 608 } 609