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_initiator.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 43 #include "bluetooth_psm.h" 44 #include "bluetooth_sdp.h" 45 #include "btstack_debug.h" 46 #include "btstack_event.h" 47 #include "l2cap.h" 48 #include "classic/avdtp.h" 49 #include "classic/avdtp_util.h" 50 #include "classic/avdtp_initiator.h" 51 52 static int avdtp_initiator_send_signaling_cmd(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 53 uint8_t command[2]; 54 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_CMD_MSG); 55 command[1] = (uint8_t)identifier; 56 return l2cap_send(cid, command, sizeof(command)); 57 } 58 59 static int avdtp_initiator_send_signaling_cmd_with_seid(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label, uint8_t sep_id){ 60 uint8_t command[3]; 61 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_CMD_MSG); 62 command[1] = (uint8_t)identifier; 63 command[2] = sep_id << 2; 64 return l2cap_send(cid, command, sizeof(command)); 65 } 66 67 static int avdtp_initiator_send_signaling_cmd_delay_report(uint16_t cid, uint8_t transaction_label, uint8_t sep_id, uint16_t delay_ms){ 68 uint8_t command[5]; 69 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_CMD_MSG); 70 command[1] = AVDTP_SI_DELAYREPORT; 71 command[2] = sep_id << 2; 72 big_endian_store_16(command, 3, delay_ms); 73 return l2cap_send(cid, command, sizeof(command)); 74 } 75 76 void avdtp_initiator_stream_config_subsm(avdtp_connection_t *connection, uint8_t *packet, uint16_t size, int offset) { 77 // int status = 0; 78 avdtp_stream_endpoint_t * stream_endpoint = NULL; 79 avdtp_stream_endpoint_t * stream_endpoint_for_event = NULL; 80 81 avdtp_sep_t sep; 82 if (connection->initiator_connection_state == AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER) { 83 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE; 84 } else { 85 stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->initiator_local_seid); 86 if (stream_endpoint == NULL) { 87 log_debug("no stream endpoint for local seid %u", connection->initiator_local_seid); 88 return; 89 } 90 log_debug("using stream endpoint %p for local seid %u", stream_endpoint, connection->initiator_local_seid); 91 92 sep.seid = connection->initiator_remote_seid; 93 94 if (stream_endpoint->initiator_config_state != AVDTP_INITIATOR_W4_ANSWER) { 95 log_error("initiator_config_state is in wrong state %d, expected %d", stream_endpoint->initiator_config_state, AVDTP_INITIATOR_W4_ANSWER); 96 return; 97 } 98 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 99 } 100 101 switch (connection->initiator_signaling_packet.message_type){ 102 case AVDTP_RESPONSE_ACCEPT_MSG: 103 switch (connection->initiator_signaling_packet.signal_identifier){ 104 case AVDTP_SI_DISCOVER:{ 105 if (connection->initiator_signaling_packet.transaction_label != connection->initiator_transaction_label){ 106 log_info("unexpected transaction label, got %d, expected %d", connection->initiator_signaling_packet.transaction_label, connection->initiator_transaction_label); 107 // status = BAD_HEADER_FORMAT; 108 break; 109 } 110 111 if (size == 3){ 112 log_info("ERROR code %02x", packet[offset]); 113 break; 114 } 115 116 int i; 117 for (i = offset; i < size; i += 2){ 118 sep.seid = packet[i] >> 2; 119 offset++; 120 if ((sep.seid < 0x01) || (sep.seid > 0x3E)){ 121 log_info("invalid sep id"); 122 // status = BAD_ACP_SEID; 123 break; 124 } 125 sep.in_use = (packet[i] >> 1) & 0x01; 126 sep.media_type = (avdtp_media_type_t)(packet[i+1] >> 4); 127 sep.type = (avdtp_sep_type_t)((packet[i+1] >> 3) & 0x01); 128 avdtp_signaling_emit_sep(connection->avdtp_cid, sep); 129 } 130 avdtp_signaling_emit_sep_done(connection->avdtp_cid); 131 break; 132 } 133 134 case AVDTP_SI_GET_CAPABILITIES: 135 case AVDTP_SI_GET_ALL_CAPABILITIES: 136 sep.registered_service_categories = avdtp_unpack_service_capabilities(connection, connection->initiator_signaling_packet.signal_identifier, &sep.capabilities, packet+offset, size-offset); 137 avdtp_signaling_emit_capabilities(connection->avdtp_cid, 138 connection->initiator_remote_seid, &sep.capabilities, 139 sep.registered_service_categories); 140 break; 141 142 case AVDTP_SI_RECONFIGURE: 143 if (!stream_endpoint){ 144 log_error("AVDTP_SI_RECONFIGURE: stream endpoint is null"); 145 break; 146 } 147 stream_endpoint_for_event = stream_endpoint; 148 stream_endpoint->remote_sep.configured_service_categories |= stream_endpoint->remote_configuration_bitmap; 149 stream_endpoint->remote_sep.configuration = stream_endpoint->remote_configuration; 150 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 151 152 // copy media codec configuration if reconfigured 153 if ((stream_endpoint->remote_configuration_bitmap & (1 << AVDTP_MEDIA_CODEC)) != 0){ 154 btstack_assert(stream_endpoint->remote_configuration.media_codec.media_codec_information_len == stream_endpoint->media_codec_configuration_len); 155 (void)memcpy(stream_endpoint->media_codec_configuration_info, stream_endpoint->remote_configuration.media_codec.media_codec_information, stream_endpoint->media_codec_configuration_len); 156 } 157 break; 158 159 case AVDTP_SI_SET_CONFIGURATION: 160 if (!stream_endpoint){ 161 log_error("AVDTP_SI_SET_CONFIGURATION: stream endpoint is null"); 162 break; 163 } 164 165 stream_endpoint_for_event = stream_endpoint; 166 167 sep.configured_service_categories = stream_endpoint->remote_configuration_bitmap; 168 sep.configuration = stream_endpoint->remote_configuration; 169 sep.in_use = 1; 170 171 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED; 172 stream_endpoint->remote_sep = sep; 173 stream_endpoint->connection = connection; 174 connection->configuration_state = AVDTP_CONFIGURATION_STATE_LOCAL_CONFIGURED; 175 176 log_info("configured remote seid %d", stream_endpoint->remote_sep.seid); 177 178 // copy media codec configuration if configured 179 if ((stream_endpoint->remote_configuration_bitmap & (1 << AVDTP_MEDIA_CODEC)) != 0) { 180 btstack_assert(stream_endpoint->remote_configuration.media_codec.media_codec_information_len == 181 stream_endpoint->media_codec_configuration_len); 182 (void) memcpy(stream_endpoint->media_codec_configuration_info, 183 stream_endpoint->remote_configuration.media_codec.media_codec_information, 184 stream_endpoint->media_codec_configuration_len); 185 186 switch (stream_endpoint->media_codec_type) { 187 case AVDTP_CODEC_SBC: 188 avdtp_signaling_emit_media_codec_sbc_configuration( 189 stream_endpoint, 190 connection->avdtp_cid, 191 stream_endpoint->media_type, 192 stream_endpoint->media_codec_configuration_info); 193 break; 194 default: 195 // TODO: we don't have codec info to emit config 196 avdtp_signaling_emit_media_codec_other_configuration(stream_endpoint, 197 connection->avdtp_cid, 198 &sep.configuration.media_codec); 199 break; 200 } 201 } 202 break; 203 204 case AVDTP_SI_OPEN: 205 if (!stream_endpoint){ 206 log_error("AVDTP_SI_OPEN: stream endpoint is null"); 207 break; 208 } 209 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_ACCEPT_OPEN_STREAM) { 210 log_error("AVDTP_SI_OPEN in wrong stream endpoint state %d", stream_endpoint->state); 211 return; 212 } 213 stream_endpoint_for_event = stream_endpoint; 214 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED; 215 connection->initiator_local_seid = stream_endpoint->sep.seid; 216 l2cap_create_channel(avdtp_packet_handler, connection->remote_addr, BLUETOOTH_PSM_AVDTP, 0xffff, NULL); 217 return; 218 case AVDTP_SI_START: 219 if (!stream_endpoint){ 220 log_error("AVDTP_SI_START: stream endpoint is null"); 221 break; 222 } 223 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_OPENED) { 224 log_error("AVDTP_SI_START in wrong stream endpoint state %d", stream_endpoint->state); 225 return; 226 } 227 stream_endpoint_for_event = stream_endpoint; 228 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 229 break; 230 case AVDTP_SI_SUSPEND: 231 if (!stream_endpoint){ 232 log_error("AVDTP_SI_SUSPEND: stream endpoint is null"); 233 break; 234 } 235 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_STREAMING) { 236 log_error("AVDTP_SI_SUSPEND in wrong stream endpoint state %d", stream_endpoint->state); 237 return; 238 } 239 stream_endpoint_for_event = stream_endpoint; 240 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 241 break; 242 case AVDTP_SI_CLOSE: 243 if (!stream_endpoint){ 244 log_error("AVDTP_SI_CLOSE: stream endpoint is null"); 245 break; 246 } 247 switch (stream_endpoint->state){ 248 case AVDTP_STREAM_ENDPOINT_OPENED: 249 case AVDTP_STREAM_ENDPOINT_STREAMING: 250 stream_endpoint_for_event = stream_endpoint; 251 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING; 252 l2cap_disconnect(stream_endpoint->l2cap_media_cid, 0); 253 break; 254 default: 255 break; 256 } 257 break; 258 case AVDTP_SI_ABORT: 259 if (!stream_endpoint){ 260 log_error("AVDTP_SI_ABORT: stream endpoint is null"); 261 break; 262 } 263 switch (stream_endpoint->state){ 264 case AVDTP_STREAM_ENDPOINT_CONFIGURED: 265 case AVDTP_STREAM_ENDPOINT_CLOSING: 266 case AVDTP_STREAM_ENDPOINT_OPENED: 267 case AVDTP_STREAM_ENDPOINT_STREAMING: 268 stream_endpoint_for_event = stream_endpoint; 269 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 270 l2cap_disconnect(stream_endpoint->l2cap_media_cid, 0); 271 break; 272 default: 273 break; 274 } 275 break; 276 277 case AVDTP_SI_DELAYREPORT: 278 break; 279 case AVDTP_SI_GET_CONFIGURATION: 280 break; 281 default: 282 log_info("AVDTP_RESPONSE_ACCEPT_MSG, signal %d not implemented", connection->initiator_signaling_packet.signal_identifier); 283 break; 284 } 285 if (stream_endpoint_for_event != NULL){ 286 avdtp_signaling_emit_accept_for_stream_endpoint(stream_endpoint_for_event, connection->initiator_local_seid, 287 connection->initiator_signaling_packet.signal_identifier, true); 288 } else { 289 avdtp_signaling_emit_accept(connection->avdtp_cid, 0, connection->initiator_signaling_packet.signal_identifier, true); 290 } 291 connection->initiator_transaction_label = avdtp_get_next_transaction_label(); 292 break; 293 case AVDTP_RESPONSE_REJECT_MSG: 294 switch (connection->initiator_signaling_packet.signal_identifier){ 295 case AVDTP_SI_SET_CONFIGURATION: 296 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 297 log_info("Received reject for set configuration, role changed from initiator to acceptor. TODO: implement retry."); 298 break; 299 default: 300 break; 301 } 302 log_info("AVDTP_RESPONSE_REJECT_MSG signal %s", avdtp_si2str(connection->initiator_signaling_packet.signal_identifier)); 303 avdtp_signaling_emit_reject(connection->avdtp_cid, connection->initiator_local_seid, 304 connection->initiator_signaling_packet.signal_identifier, true); 305 return; 306 case AVDTP_GENERAL_REJECT_MSG: 307 log_info("AVDTP_GENERAL_REJECT_MSG signal %s", avdtp_si2str(connection->initiator_signaling_packet.signal_identifier)); 308 avdtp_signaling_emit_general_reject(connection->avdtp_cid, connection->initiator_local_seid, 309 connection->initiator_signaling_packet.signal_identifier, true); 310 return; 311 default: 312 break; 313 } 314 } 315 316 static bool avdtp_initiator_stream_config_subsm_run_signaling(avdtp_connection_t * connection){ 317 switch (connection->initiator_connection_state){ 318 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS: 319 log_info("W2_DISCOVER_SEPS"); 320 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 321 avdtp_initiator_send_signaling_cmd(connection->l2cap_signaling_cid, AVDTP_SI_DISCOVER, connection->initiator_transaction_label); 322 return true; 323 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES: 324 log_info("W2_GET_CAPABILITIES"); 325 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 326 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CAPABILITIES, connection->initiator_transaction_label, connection->initiator_remote_seid); 327 return true; 328 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES: 329 log_info("W2_GET_ALL_CAPABILITIES"); 330 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 331 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_ALL_CAPABILITIES, connection->initiator_transaction_label, connection->initiator_remote_seid); 332 return true; 333 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION: 334 log_info("W4_GET_CONFIGURATION"); 335 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 336 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CONFIGURATION, connection->initiator_transaction_label, connection->initiator_remote_seid); 337 return true; 338 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_DELAY_REPORT: 339 log_info("W4_DELAY_REPORT"); 340 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 341 avdtp_initiator_send_signaling_cmd_delay_report(connection->l2cap_signaling_cid, connection->initiator_transaction_label, 342 connection->initiator_remote_seid, connection->delay_ms); 343 return true; 344 default: 345 break; 346 } 347 return false; 348 } 349 350 static bool avdtp_initiator_stream_config_subsm_run_endpoint(avdtp_connection_t * connection, avdtp_stream_endpoint_t * stream_endpoint){ 351 log_debug("SE %p, initiator_config_state: 0x%02x", stream_endpoint, stream_endpoint->initiator_config_state); 352 switch (stream_endpoint->initiator_config_state){ 353 case AVDTP_INITIATOR_W2_SET_CONFIGURATION: 354 case AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID:{ 355 if ((stream_endpoint->initiator_config_state == AVDTP_INITIATOR_W2_SET_CONFIGURATION) && (connection->configuration_state != AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED)){ 356 log_info("initiator SM stop sending SET_CONFIGURATION cmd:"); 357 break; 358 } 359 log_info("W2_(RE)CONFIGURATION bitmap, local seid 0x%02x, remote seid 0x%02x", connection->initiator_local_seid, connection->initiator_remote_seid); 360 // log_info_hexdump( connection->remote_capabilities.media_codec.media_codec_information, connection->remote_capabilities.media_codec.media_codec_information_len); 361 connection->initiator_signaling_packet.acp_seid = connection->initiator_remote_seid; 362 connection->initiator_signaling_packet.int_seid = connection->initiator_local_seid; 363 364 connection->initiator_signaling_packet.signal_identifier = AVDTP_SI_SET_CONFIGURATION; 365 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE; 366 if (stream_endpoint->initiator_config_state == AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID){ 367 connection->initiator_signaling_packet.signal_identifier = AVDTP_SI_RECONFIGURE; 368 } 369 370 avdtp_prepare_capabilities(&connection->initiator_signaling_packet, connection->initiator_transaction_label, stream_endpoint->remote_configuration_bitmap, stream_endpoint->remote_configuration, connection->initiator_signaling_packet.signal_identifier); 371 l2cap_reserve_packet_buffer(); 372 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 373 uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->initiator_signaling_packet, out_buffer); 374 if ((connection->initiator_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->initiator_signaling_packet.packet_type != AVDTP_END_PACKET)){ 375 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND; 376 log_info("fragmented"); 377 } else { 378 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER; 379 } 380 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 381 if (stream_endpoint->initiator_config_state == AVDTP_INITIATOR_FRAGMENTATED_COMMAND){ 382 avdtp_request_can_send_now_initiator(connection); 383 } 384 return true; 385 } 386 case AVDTP_INITIATOR_FRAGMENTATED_COMMAND:{ 387 l2cap_reserve_packet_buffer(); 388 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 389 uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->initiator_signaling_packet, out_buffer); 390 if ((connection->initiator_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->initiator_signaling_packet.packet_type != AVDTP_END_PACKET)){ 391 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND; 392 log_info("fragmented"); 393 } else { 394 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER; 395 } 396 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 397 if (stream_endpoint->initiator_config_state == AVDTP_INITIATOR_FRAGMENTATED_COMMAND){ 398 avdtp_request_can_send_now_initiator(connection); 399 } 400 return true; 401 } 402 case AVDTP_INITIATOR_W2_OPEN_STREAM: 403 switch (stream_endpoint->state){ 404 case AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM: 405 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_ACCEPT_OPEN_STREAM; 406 log_info("send AVDTP_SI_OPEN signaling to remote, transaction_label %d, remote seid 0x%02x", connection->initiator_transaction_label, connection->initiator_remote_seid); 407 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_OPEN, connection->initiator_transaction_label, connection->initiator_remote_seid); 408 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER; 409 return true; 410 default: 411 break; 412 } 413 break; 414 default: 415 break; 416 } 417 return false; 418 } 419 420 void avdtp_initiator_stream_config_subsm_handle_can_send_now_signaling(avdtp_connection_t *connection) { 421 bool sent; 422 423 sent = avdtp_initiator_stream_config_subsm_run_signaling(connection); 424 if (sent) return; 425 426 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->initiator_local_seid); 427 428 if (stream_endpoint == NULL) return; 429 sent = avdtp_initiator_stream_config_subsm_run_endpoint(connection, stream_endpoint); 430 if (sent) return; 431 432 log_debug("stream: start %u, close %u, abort %u, suspend %u, request %u", stream_endpoint->start_stream, stream_endpoint->close_stream, 433 stream_endpoint->abort_stream, stream_endpoint->suspend_stream, stream_endpoint->request_can_send_now); 434 435 if (stream_endpoint->start_stream){ 436 stream_endpoint->start_stream = 0; 437 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_OPENED){ 438 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER; 439 connection->initiator_local_seid = stream_endpoint->sep.seid; 440 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 441 connection->initiator_transaction_label = avdtp_get_next_transaction_label(); 442 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_START, connection->initiator_transaction_label, connection->initiator_remote_seid); 443 return; 444 } 445 } 446 447 if (stream_endpoint->close_stream){ 448 stream_endpoint->close_stream = 0; 449 switch (stream_endpoint->state){ 450 case AVDTP_STREAM_ENDPOINT_OPENED: 451 case AVDTP_STREAM_ENDPOINT_STREAMING: 452 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER; 453 connection->initiator_local_seid = stream_endpoint->sep.seid; 454 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 455 connection->initiator_transaction_label = avdtp_get_next_transaction_label(); 456 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_CLOSE, connection->initiator_transaction_label, connection->initiator_remote_seid); 457 return; 458 default: 459 break; 460 } 461 } 462 463 if (stream_endpoint->abort_stream){ 464 stream_endpoint->abort_stream = 0; 465 switch (stream_endpoint->state){ 466 case AVDTP_STREAM_ENDPOINT_CONFIGURED: 467 case AVDTP_STREAM_ENDPOINT_CLOSING: 468 case AVDTP_STREAM_ENDPOINT_OPENED: 469 case AVDTP_STREAM_ENDPOINT_STREAMING: 470 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER; 471 connection->initiator_local_seid = stream_endpoint->sep.seid; 472 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 473 connection->initiator_transaction_label = avdtp_get_next_transaction_label(); 474 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_ABORT, connection->initiator_transaction_label, connection->initiator_remote_seid); 475 return; 476 default: 477 break; 478 } 479 } 480 481 if (stream_endpoint->suspend_stream){ 482 stream_endpoint->suspend_stream = 0; 483 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING){ 484 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER; 485 connection->initiator_local_seid = stream_endpoint->sep.seid; 486 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 487 connection->initiator_transaction_label = avdtp_get_next_transaction_label(); 488 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_SUSPEND, connection->initiator_transaction_label, connection->initiator_remote_seid); 489 return; 490 } 491 } 492 493 } 494 495 void avdtp_initiator_stream_config_subsm_handle_can_send_now_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint) { 496 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING){ 497 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 498 avdtp_streaming_emit_can_send_media_packet_now(stream_endpoint, stream_endpoint->sequence_number); 499 } 500 } 501