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 #define __BTSTACK_FILE__ "avdtp_acceptor.c" 38 39 #include <stdint.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 44 #include "btstack.h" 45 #include "classic/avdtp.h" 46 #include "classic/avdtp_util.h" 47 #include "classic/avdtp_acceptor.h" 48 49 50 static int avdtp_acceptor_send_accept_response(uint16_t cid, uint8_t transaction_label, avdtp_signal_identifier_t identifier){ 51 uint8_t command[2]; 52 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_ACCEPT_MSG); 53 command[1] = (uint8_t)identifier; 54 return l2cap_send(cid, command, sizeof(command)); 55 } 56 57 static int avdtp_acceptor_process_chunk(avdtp_signaling_packet_t * signaling_packet, uint8_t * packet, uint16_t size){ 58 memcpy(signaling_packet->command + signaling_packet->size, packet, size); 59 signaling_packet->size += size; 60 return signaling_packet->packet_type == AVDTP_SINGLE_PACKET || signaling_packet->packet_type == AVDTP_END_PACKET; 61 } 62 63 static int avdtp_acceptor_validate_msg_length(avdtp_signal_identifier_t signal_identifier, uint16_t msg_size){ 64 int minimal_msg_lenght = 2; 65 switch (signal_identifier){ 66 case AVDTP_SI_GET_CAPABILITIES: 67 case AVDTP_SI_GET_ALL_CAPABILITIES: 68 case AVDTP_SI_SET_CONFIGURATION: 69 case AVDTP_SI_GET_CONFIGURATION: 70 case AVDTP_SI_START: 71 case AVDTP_SI_CLOSE: 72 case AVDTP_SI_ABORT: 73 case AVDTP_SI_RECONFIGURE: 74 case AVDTP_SI_OPEN: 75 minimal_msg_lenght = 3; 76 break; 77 default: 78 break; 79 } 80 return msg_size >= minimal_msg_lenght; 81 } 82 83 void avdtp_acceptor_stream_config_subsm(avdtp_connection_t * connection, uint8_t * packet, uint16_t size, int offset, avdtp_context_t * context){ 84 avdtp_stream_endpoint_t * stream_endpoint; 85 connection->acceptor_transaction_label = connection->signaling_packet.transaction_label; 86 87 if (!avdtp_acceptor_validate_msg_length(connection->signaling_packet.signal_identifier, size)) { 88 connection->error_code = BAD_LENGTH; 89 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 90 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 91 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 92 return; 93 } 94 95 switch (connection->signaling_packet.signal_identifier){ 96 case AVDTP_SI_DISCOVER: 97 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 98 log_info("ACP: AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS"); 99 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS; 100 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 101 return; 102 case AVDTP_SI_GET_CAPABILITIES: 103 case AVDTP_SI_GET_ALL_CAPABILITIES: 104 case AVDTP_SI_SET_CONFIGURATION: 105 case AVDTP_SI_GET_CONFIGURATION: 106 case AVDTP_SI_START: 107 case AVDTP_SI_CLOSE: 108 case AVDTP_SI_ABORT: 109 case AVDTP_SI_OPEN: 110 case AVDTP_SI_RECONFIGURE: 111 connection->local_seid = packet[offset++] >> 2; 112 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->local_seid, context); 113 if (!stream_endpoint){ 114 log_info("ACP: cmd %d - RESPONSE REJECT", connection->signaling_packet.signal_identifier); 115 connection->error_code = BAD_ACP_SEID; 116 if (connection->signaling_packet.signal_identifier == AVDTP_SI_OPEN){ 117 connection->error_code = BAD_STATE; 118 } 119 120 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 121 if (connection->signaling_packet.signal_identifier == AVDTP_SI_RECONFIGURE){ 122 connection->reject_service_category = connection->local_seid; 123 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 124 } 125 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 126 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 127 return; 128 } 129 break; 130 131 case AVDTP_SI_SUSPEND:{ 132 int i; 133 log_info("ACP: AVDTP_SI_SUSPEND seids: "); 134 connection->num_suspended_seids = 0; 135 136 for (i = offset; i < size; i++){ 137 connection->suspended_seids[connection->num_suspended_seids] = packet[i] >> 2; 138 offset++; 139 log_info("%d, ", connection->suspended_seids[connection->num_suspended_seids]); 140 connection->num_suspended_seids++; 141 } 142 143 if (connection->num_suspended_seids == 0) { 144 log_info("ACP: CATEGORY RESPONSE REJECT BAD_ACP_SEID"); 145 connection->error_code = BAD_ACP_SEID; 146 connection->reject_service_category = connection->local_seid; 147 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 148 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 149 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 150 return; 151 } 152 // deal with first susspended seid 153 connection->local_seid = connection->suspended_seids[0]; 154 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->local_seid, context); 155 if (!stream_endpoint){ 156 log_info("ACP: stream_endpoint not found, CATEGORY RESPONSE REJECT BAD_ACP_SEID"); 157 connection->error_code = BAD_ACP_SEID; 158 connection->reject_service_category = connection->local_seid; 159 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 160 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 161 connection->num_suspended_seids = 0; 162 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 163 return; 164 } 165 break; 166 } 167 default: 168 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE; 169 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 170 log_info("AVDTP_CMD_MSG signal %d not implemented, general reject", connection->signaling_packet.signal_identifier); 171 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 172 return; 173 } 174 175 if (!stream_endpoint) { 176 return; 177 } 178 179 if (!avdtp_acceptor_process_chunk(&connection->signaling_packet, packet, size)) return; 180 181 uint16_t packet_size = connection->signaling_packet.size; 182 connection->signaling_packet.size = 0; 183 184 int request_to_send = 1; 185 switch (stream_endpoint->acceptor_config_state){ 186 case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE: 187 switch (connection->signaling_packet.signal_identifier){ 188 case AVDTP_SI_GET_ALL_CAPABILITIES: 189 log_info("ACP: AVDTP_SI_GET_ALL_CAPABILITIES"); 190 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES; 191 break; 192 case AVDTP_SI_GET_CAPABILITIES: 193 log_info("ACP: AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES"); 194 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES; 195 break; 196 case AVDTP_SI_SET_CONFIGURATION:{ 197 log_info("acceptor SM received SET_CONFIGURATION cmd: role is_initiator %d", connection->is_initiator); 198 199 if (connection->is_initiator){ 200 if (connection->is_configuration_initiated_locally){ 201 log_info("ACP: Set configuration already initiated locally, reject cmd "); 202 // fire configuration parsing errors 203 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 204 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD; 205 connection->is_initiator = 1; 206 break; 207 } 208 connection->is_initiator = 0; 209 log_info("acceptor SM received SET_CONFIGURATION cmd: change role to acceptor, is_initiator %d", connection->is_initiator); 210 } 211 212 213 log_info("ACP: AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION "); 214 215 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION; 216 connection->reject_service_category = 0; 217 stream_endpoint->connection = connection; 218 avdtp_sep_t sep; 219 sep.seid = connection->signaling_packet.command[offset++] >> 2; 220 sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, connection->signaling_packet.command+offset, packet_size-offset); 221 sep.in_use = 1; 222 223 if (connection->error_code){ 224 log_info("fire configuration parsing errors "); 225 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 226 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 227 break; 228 } 229 // find or add sep 230 231 stream_endpoint->remote_sep_index = avdtp_find_remote_sep(stream_endpoint->connection, sep.seid); 232 log_info("ACP .. seid %d, index %d", sep.seid, stream_endpoint->remote_sep_index); 233 234 if (stream_endpoint->remote_sep_index != AVDTP_INVALID_SEP_INDEX){ 235 if (stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].in_use){ 236 // if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_OPENED){ 237 // stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 238 // log_info("ACP: update seid %d, to %p", stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 239 // break; 240 // } 241 // reject if already configured 242 connection->error_code = SEP_IN_USE; 243 // find first registered category and fire the error 244 connection->reject_service_category = 0; 245 int i; 246 for (i = 1; i < 9; i++){ 247 if (get_bit16(sep.configured_service_categories, i)){ 248 connection->reject_service_category = i; 249 break; 250 } 251 } 252 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 253 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 254 } else { 255 stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 256 log_info("ACP: update seid %d, to %p", stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 257 } 258 } else { 259 // add new 260 log_info("ACP: seid %d not found in %p", sep.seid, stream_endpoint); 261 stream_endpoint->remote_sep_index = connection->remote_seps_num; 262 connection->remote_seps_num++; 263 connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 264 log_info("ACP: add seid %d, to %p", connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 265 } 266 if (get_bit16(sep.configured_service_categories, AVDTP_MEDIA_CODEC)){ 267 switch (sep.configuration.media_codec.media_codec_type){ 268 case AVDTP_CODEC_SBC: 269 avdtp_signaling_emit_media_codec_sbc_configuration(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), 270 sep.configuration.media_codec.media_type, sep.configuration.media_codec.media_codec_information); 271 break; 272 default: 273 avdtp_signaling_emit_media_codec_other_configuration(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), sep.configuration.media_codec); 274 break; 275 } 276 } 277 avdtp_signaling_emit_accept(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint), connection->signaling_packet.signal_identifier); 278 break; 279 } 280 case AVDTP_SI_RECONFIGURE:{ 281 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE; 282 connection->reject_service_category = 0; 283 284 avdtp_sep_t sep; 285 sep.seid = connection->local_seid; 286 log_info("ACP: AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE seid %d", sep.seid); 287 sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, connection->signaling_packet.command+offset, packet_size-offset); 288 if (connection->error_code){ 289 // fire configuration parsing errors 290 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 291 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 292 break; 293 } 294 295 // find sep or raise error 296 stream_endpoint->remote_sep_index = avdtp_find_remote_sep(stream_endpoint->connection, sep.seid); 297 if (stream_endpoint->remote_sep_index == AVDTP_INVALID_SEP_INDEX){ 298 log_info("ACP: REJECT AVDTP_SI_RECONFIGURE, BAD_ACP_SEID"); 299 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 300 connection->error_code = BAD_ACP_SEID; 301 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 302 break; 303 } 304 stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index] = sep; 305 log_info("ACP: update seid %d, to %p", stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index].seid, stream_endpoint); 306 307 if (get_bit16(sep.configured_service_categories, AVDTP_MEDIA_CODEC)){ 308 switch (sep.capabilities.media_codec.media_codec_type){ 309 case AVDTP_CODEC_SBC: 310 avdtp_signaling_emit_media_codec_sbc_reconfiguration(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), 311 sep.configuration.media_codec.media_type, sep.configuration.media_codec.media_codec_information); 312 break; 313 default: 314 avdtp_signaling_emit_media_codec_other_reconfiguration(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), sep.configuration.media_codec); 315 break; 316 } 317 } 318 avdtp_signaling_emit_accept(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint), connection->signaling_packet.signal_identifier); 319 break; 320 } 321 322 case AVDTP_SI_GET_CONFIGURATION: 323 log_info("ACP: AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION"); 324 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION; 325 break; 326 case AVDTP_SI_OPEN: 327 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_CONFIGURED){ 328 log_info("ACP: REJECT AVDTP_SI_OPEN, BAD_STATE"); 329 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 330 connection->error_code = BAD_STATE; 331 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 332 break; 333 } 334 log_info("ACP: AVDTP_STREAM_ENDPOINT_W2_ANSWER_OPEN_STREAM"); 335 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM; 336 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED; 337 connection->local_seid = stream_endpoint->sep.seid; 338 break; 339 case AVDTP_SI_START: 340 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_OPENED){ 341 log_info("ACP: REJECT AVDTP_SI_START, BAD_STATE"); 342 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 343 connection->error_code = BAD_STATE; 344 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 345 break; 346 } 347 log_info("ACP: AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM"); 348 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM; 349 break; 350 case AVDTP_SI_CLOSE: 351 switch (stream_endpoint->state){ 352 case AVDTP_STREAM_ENDPOINT_OPENED: 353 case AVDTP_STREAM_ENDPOINT_STREAMING: 354 log_info("ACP: AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM"); 355 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING; 356 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM; 357 break; 358 default: 359 log_info("ACP: AVDTP_SI_CLOSE, bad state %d ", stream_endpoint->state); 360 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 361 connection->error_code = BAD_STATE; 362 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 363 break; 364 } 365 break; 366 case AVDTP_SI_ABORT: 367 switch (stream_endpoint->state){ 368 case AVDTP_STREAM_ENDPOINT_CONFIGURED: 369 case AVDTP_STREAM_ENDPOINT_CLOSING: 370 case AVDTP_STREAM_ENDPOINT_OPENED: 371 case AVDTP_STREAM_ENDPOINT_STREAMING: 372 log_info("ACP: AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM"); 373 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 374 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM; 375 break; 376 default: 377 log_info("ACP: AVDTP_SI_ABORT, bad state %d ", stream_endpoint->state); 378 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE; 379 connection->error_code = BAD_STATE; 380 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 381 break; 382 } 383 break; 384 case AVDTP_SI_SUSPEND: 385 log_info(" entering AVDTP_SI_SUSPEND"); 386 switch (stream_endpoint->state){ 387 case AVDTP_STREAM_ENDPOINT_OPENED: 388 case AVDTP_STREAM_ENDPOINT_STREAMING: 389 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 390 connection->num_suspended_seids--; 391 if (connection->num_suspended_seids <= 0){ 392 log_info("ACP: AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM"); 393 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM; 394 } 395 break; 396 default: 397 log_info("ACP: AVDTP_SI_SUSPEND, bad state "); 398 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE; 399 connection->error_code = BAD_STATE; 400 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 401 break; 402 } 403 404 //stream_endpoint->state = AVDTP_STREAM_ENDPOINT_SUSPENDING; 405 //stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_SUSPEND_STREAM; 406 break; 407 default: 408 log_info("ACP: NOT IMPLEMENTED, Reject signal_identifier %02x", connection->signaling_packet.signal_identifier); 409 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD; 410 connection->reject_signal_identifier = connection->signaling_packet.signal_identifier; 411 break; 412 } 413 break; 414 default: 415 return; 416 } 417 418 if (!request_to_send){ 419 log_info("ACP: NOT IMPLEMENTED"); 420 } 421 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 422 } 423 424 static int avdtp_acceptor_send_seps_response(uint16_t cid, uint8_t transaction_label, avdtp_stream_endpoint_t * endpoints){ 425 uint8_t command[2+2*MAX_NUM_SEPS]; 426 int pos = 0; 427 command[pos++] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_ACCEPT_MSG); 428 command[pos++] = (uint8_t)AVDTP_SI_DISCOVER; 429 430 btstack_linked_list_iterator_t it; 431 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) endpoints); 432 while (btstack_linked_list_iterator_has_next(&it)){ 433 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 434 command[pos++] = (stream_endpoint->sep.seid << 2) | (stream_endpoint->sep.in_use<<1); 435 command[pos++] = (stream_endpoint->sep.media_type << 4) | (stream_endpoint->sep.type << 3); 436 } 437 return l2cap_send(cid, command, pos); 438 } 439 440 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){ 441 uint8_t command[4]; 442 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 443 command[1] = (uint8_t)identifier; 444 command[2] = category; 445 command[3] = error_code; 446 return l2cap_send(cid, command, sizeof(command)); 447 } 448 449 static int avdtp_acceptor_send_response_general_reject(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 450 uint8_t command[2]; 451 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_GENERAL_REJECT_MSG); 452 command[1] = (uint8_t)identifier; 453 return l2cap_send(cid, command, sizeof(command)); 454 } 455 456 static int avdtp_acceptor_send_response_reject(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 457 uint8_t command[2]; 458 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 459 command[1] = (uint8_t)identifier; 460 return l2cap_send(cid, command, sizeof(command)); 461 } 462 463 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){ 464 uint8_t command[3]; 465 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_RESPONSE_REJECT_MSG); 466 command[1] = (uint8_t)identifier; 467 command[2] = error_code; 468 return l2cap_send(cid, command, sizeof(command)); 469 } 470 471 void avdtp_acceptor_stream_config_subsm_run(avdtp_connection_t * connection, avdtp_context_t * context){ 472 int sent = 1; 473 btstack_linked_list_t * stream_endpoints = &context->stream_endpoints; 474 475 switch (connection->acceptor_connection_state){ 476 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_ANSWER_DISCOVER_SEPS: 477 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 478 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 479 avdtp_acceptor_send_seps_response(connection->l2cap_signaling_cid, connection->acceptor_transaction_label, (avdtp_stream_endpoint_t *) stream_endpoints); 480 break; 481 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE: 482 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 483 avdtp_acceptor_send_response_reject_with_error_code(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->error_code, connection->acceptor_transaction_label); 484 break; 485 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE: 486 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 487 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); 488 break; 489 case AVDTP_SIGNALING_CONNECTION_ACCEPTOR_W2_GENERAL_REJECT_WITH_ERROR_CODE: 490 connection->acceptor_connection_state = AVDTP_SIGNALING_CONNECTION_ACCEPTOR_IDLE; 491 avdtp_acceptor_send_response_general_reject(connection->l2cap_signaling_cid, connection->reject_signal_identifier, connection->acceptor_transaction_label); 492 break; 493 default: 494 sent = 0; 495 break; 496 } 497 if (sent){ 498 log_info("ACP: DONE"); 499 return; 500 } 501 502 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(connection->local_seid, context); 503 if (!stream_endpoint) return; 504 505 uint8_t reject_service_category = connection->reject_service_category; 506 avdtp_signal_identifier_t reject_signal_identifier = connection->reject_signal_identifier; 507 uint8_t error_code = connection->error_code; 508 uint16_t cid = stream_endpoint->connection ? stream_endpoint->connection->l2cap_signaling_cid : connection->l2cap_signaling_cid; 509 uint8_t trid = stream_endpoint->connection ? stream_endpoint->connection->acceptor_transaction_label : connection->acceptor_transaction_label; 510 511 avdtp_acceptor_stream_endpoint_state_t acceptor_config_state = stream_endpoint->acceptor_config_state; 512 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 513 uint8_t * out_buffer; 514 uint16_t pos; 515 516 switch (acceptor_config_state){ 517 case AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE: 518 break; 519 case AVDTP_ACCEPTOR_W2_ANSWER_GET_CAPABILITIES: 520 avdtp_prepare_capabilities(&connection->signaling_packet, trid, stream_endpoint->sep.registered_service_categories, stream_endpoint->sep.capabilities, AVDTP_SI_GET_CAPABILITIES); 521 l2cap_reserve_packet_buffer(); 522 out_buffer = l2cap_get_outgoing_buffer(); 523 pos = avdtp_signaling_create_fragment(cid, &connection->signaling_packet, out_buffer); 524 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 525 stream_endpoint->acceptor_config_state = acceptor_config_state; 526 log_info("ACP: fragmented"); 527 } else { 528 log_info("ACP:DONE"); 529 } 530 l2cap_send_prepared(cid, pos); 531 break; 532 case AVDTP_ACCEPTOR_W2_ANSWER_GET_ALL_CAPABILITIES: 533 avdtp_prepare_capabilities(&connection->signaling_packet, trid, stream_endpoint->sep.registered_service_categories, stream_endpoint->sep.capabilities, AVDTP_SI_GET_ALL_CAPABILITIES); 534 l2cap_reserve_packet_buffer(); 535 out_buffer = l2cap_get_outgoing_buffer(); 536 pos = avdtp_signaling_create_fragment(cid, &connection->signaling_packet, out_buffer); 537 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 538 stream_endpoint->acceptor_config_state = acceptor_config_state; 539 log_info("ACP: fragmented"); 540 } else { 541 log_info("ACP:DONE"); 542 } 543 l2cap_send_prepared(cid, pos); 544 break; 545 case AVDTP_ACCEPTOR_W2_ANSWER_SET_CONFIGURATION: 546 log_info("ACP: DONE"); 547 log_info(" -> AVDTP_STREAM_ENDPOINT_CONFIGURED"); 548 stream_endpoint->connection = connection; 549 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED; 550 // TODO: consider reconfiguration 551 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_SET_CONFIGURATION); 552 break; 553 case AVDTP_ACCEPTOR_W2_ANSWER_RECONFIGURE: 554 log_info("ACP: DONE "); 555 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_RECONFIGURE); 556 break; 557 558 case AVDTP_ACCEPTOR_W2_ANSWER_GET_CONFIGURATION:{ 559 avdtp_sep_t sep = stream_endpoint->connection->remote_seps[stream_endpoint->remote_sep_index]; 560 avdtp_prepare_capabilities(&connection->signaling_packet, trid, sep.configured_service_categories, sep.configuration, AVDTP_SI_GET_CONFIGURATION); 561 l2cap_reserve_packet_buffer(); 562 out_buffer = l2cap_get_outgoing_buffer(); 563 pos = avdtp_signaling_create_fragment(cid, &connection->signaling_packet, out_buffer); 564 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 565 stream_endpoint->acceptor_config_state = acceptor_config_state; 566 log_info("ACP: fragmented"); 567 } else { 568 log_info("ACP:DONE"); 569 } 570 l2cap_send_prepared(cid, pos); 571 break; 572 } 573 case AVDTP_ACCEPTOR_W2_ANSWER_OPEN_STREAM: 574 log_info("ACP: DONE"); 575 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_OPEN); 576 break; 577 case AVDTP_ACCEPTOR_W2_ANSWER_START_STREAM: 578 log_info("ACP: DONE "); 579 log_info(" -> AVDTP_STREAM_ENDPOINT_STREAMING "); 580 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 581 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_START); 582 break; 583 case AVDTP_ACCEPTOR_W2_ANSWER_CLOSE_STREAM: 584 log_info("ACP: DONE"); 585 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_CLOSE); 586 break; 587 case AVDTP_ACCEPTOR_W2_ANSWER_ABORT_STREAM: 588 log_info("ACP: DONE"); 589 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_ABORT); 590 break; 591 case AVDTP_ACCEPTOR_W2_ANSWER_SUSPEND_STREAM: 592 log_info("ACP: DONE"); 593 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 594 avdtp_acceptor_send_accept_response(cid, trid, AVDTP_SI_SUSPEND); 595 break; 596 case AVDTP_ACCEPTOR_W2_REJECT_UNKNOWN_CMD: 597 log_info("ACP: DONE REJECT"); 598 connection->reject_signal_identifier = AVDTP_SI_NONE; 599 avdtp_acceptor_send_response_reject(cid, reject_signal_identifier, trid); 600 break; 601 case AVDTP_ACCEPTOR_W2_REJECT_CATEGORY_WITH_ERROR_CODE: 602 log_info("ACP: DONE REJECT CATEGORY"); 603 connection->reject_service_category = 0; 604 avdtp_acceptor_send_response_reject_service_category(cid, reject_signal_identifier, reject_service_category, error_code, trid); 605 break; 606 case AVDTP_ACCEPTOR_W2_REJECT_WITH_ERROR_CODE: 607 log_info("ACP: DONE REJECT"); 608 connection->reject_signal_identifier = AVDTP_SI_NONE; 609 connection->error_code = 0; 610 avdtp_acceptor_send_response_reject_with_error_code(cid, reject_signal_identifier, error_code, trid); 611 break; 612 default: 613 log_info("ACP: NOT IMPLEMENTED"); 614 sent = 0; 615 break; 616 } 617 avdtp_signaling_emit_accept(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint), connection->signaling_packet.signal_identifier); 618 // check fragmentation 619 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 620 avdtp_request_can_send_now_acceptor(connection, connection->l2cap_signaling_cid); 621 } 622 } 623