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 80 avdtp_sep_t sep; 81 if (connection->initiator_connection_state == AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER) { 82 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE; 83 } else { 84 stream_endpoint = avdtp_get_stream_endpoint_associated_with_acp_seid(connection->initiator_remote_seid); 85 if (!stream_endpoint){ 86 stream_endpoint = avdtp_get_stream_endpoint_with_seid(connection->initiator_local_seid); 87 } 88 if (!stream_endpoint) { 89 log_error("stream_endpoint for seid 0x%02x not found", connection->initiator_local_seid); 90 return; 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_emit_capabilities(connection->avdtp_cid, connection->initiator_local_seid, 138 connection->initiator_remote_seid, &sep.capabilities, 139 sep.registered_service_categories); 140 break; 141 case AVDTP_SI_DELAYREPORT: 142 avdtp_signaling_emit_delay(connection->avdtp_cid, connection->initiator_local_seid, 143 little_endian_read_16(packet, offset)); 144 break; 145 case AVDTP_SI_GET_CONFIGURATION: 146 // sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, packet+offset, size-offset); 147 // if (get_bit16(sep.configured_service_categories, AVDTP_MEDIA_CODEC)){ 148 // switch (sep.configuration.media_codec.media_codec_type){ 149 // case AVDTP_CODEC_SBC: 150 // avdtp_signaling_emit_media_codec_sbc_configuration(context->avdtp_callback, connection->avdtp_cid, connection->initiator_local_seid, connection->remote_seid, 151 // sep.configuration.media_codec.media_type, sep.configuration.media_codec.media_codec_information); 152 // break; 153 // default: 154 // avdtp_signaling_emit_media_codec_other_configuration(context->avdtp_callback, connection->avdtp_cid, connection->initiator_local_seid, connection->remote_seid, sep.configuration.media_codec); 155 // break; 156 // } 157 // } 158 break; 159 160 case AVDTP_SI_RECONFIGURE: 161 if (!stream_endpoint){ 162 log_error("AVDTP_SI_RECONFIGURE: stream endpoint is null"); 163 break; 164 } 165 // copy sbc media codec info 166 stream_endpoint->remote_sep.configured_service_categories |= stream_endpoint->remote_configuration_bitmap; 167 stream_endpoint->remote_sep.configuration = stream_endpoint->remote_configuration; 168 (void)memcpy(stream_endpoint->media_codec_sbc_info, 169 stream_endpoint->remote_configuration.media_codec.media_codec_information, 170 4); 171 stream_endpoint->remote_sep.configuration.media_codec.media_codec_information = stream_endpoint->media_codec_sbc_info; 172 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 173 break; 174 175 case AVDTP_SI_SET_CONFIGURATION:{ 176 if (!stream_endpoint){ 177 log_error("AVDTP_SI_SET_CONFIGURATION: stream endpoint is null"); 178 break; 179 } 180 sep.configured_service_categories = stream_endpoint->remote_configuration_bitmap; 181 sep.configuration = stream_endpoint->remote_configuration; 182 sep.in_use = 1; 183 184 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED; 185 stream_endpoint->remote_sep = sep; 186 stream_endpoint->connection = connection; 187 connection->configuration_state = AVDTP_CONFIGURATION_STATE_LOCAL_CONFIGURED; 188 189 log_info("INT: configured remote seid %d, to %p", stream_endpoint->remote_sep.seid, stream_endpoint); 190 191 switch (stream_endpoint->media_codec_type){ 192 case AVDTP_CODEC_SBC: 193 avdtp_signaling_emit_media_codec_sbc_configuration( 194 stream_endpoint, 195 connection->avdtp_cid, 196 stream_endpoint->media_type, 197 stream_endpoint->media_codec_sbc_info); 198 break; 199 default: 200 // TODO: we don\t have codec info to emit config 201 avdtp_signaling_emit_media_codec_other_configuration(stream_endpoint, 202 connection->avdtp_cid, 203 connection->initiator_local_seid, 204 connection->initiator_remote_seid, 205 sep.configuration.media_codec); 206 break; 207 } 208 break; 209 } 210 211 case AVDTP_SI_OPEN: 212 if (!stream_endpoint){ 213 log_error("AVDTP_SI_OPEN: stream endpoint is null"); 214 break; 215 } 216 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM) { 217 log_error("AVDTP_SI_OPEN in wrong stream endpoint state"); 218 return; 219 } 220 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED; 221 connection->initiator_local_seid = stream_endpoint->sep.seid; 222 l2cap_create_channel(avdtp_packet_handler, connection->remote_addr, BLUETOOTH_PSM_AVDTP, 0xffff, NULL); 223 return; 224 case AVDTP_SI_START: 225 if (!stream_endpoint){ 226 log_error("AVDTP_SI_START: stream endpoint is null"); 227 break; 228 } 229 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_OPENED) { 230 log_error("AVDTP_SI_START in wrong stream endpoint state"); 231 return; 232 } 233 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 234 break; 235 case AVDTP_SI_SUSPEND: 236 if (!stream_endpoint){ 237 log_error("AVDTP_SI_SUSPEND: stream endpoint is null"); 238 break; 239 } 240 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_STREAMING) { 241 log_error("AVDTP_SI_SUSPEND in wrong stream endpoint state"); 242 return; 243 } 244 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 245 break; 246 case AVDTP_SI_CLOSE: 247 if (!stream_endpoint){ 248 log_error("AVDTP_SI_CLOSE: stream endpoint is null"); 249 break; 250 } 251 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING; 252 break; 253 case AVDTP_SI_ABORT: 254 if (!stream_endpoint){ 255 log_error("AVDTP_SI_ABORT: stream endpoint is null"); 256 break; 257 } 258 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 259 break; 260 default: 261 log_info(" AVDTP_RESPONSE_ACCEPT_MSG, signal %d not implemented", connection->initiator_signaling_packet.signal_identifier); 262 break; 263 } 264 avdtp_signaling_emit_accept(connection->avdtp_cid, 0, 265 connection->initiator_signaling_packet.signal_identifier, true); 266 connection->initiator_transaction_label++; 267 break; 268 case AVDTP_RESPONSE_REJECT_MSG: 269 switch (connection->initiator_signaling_packet.signal_identifier){ 270 case AVDTP_SI_SET_CONFIGURATION: 271 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 272 log_info("Received reject for set configuration, role changed from initiator to acceptor. TODO: implement retry."); 273 break; 274 default: 275 break; 276 } 277 log_info(" AVDTP_RESPONSE_REJECT_MSG signal %s", avdtp_si2str(connection->initiator_signaling_packet.signal_identifier)); 278 avdtp_signaling_emit_reject(connection->avdtp_cid, connection->initiator_local_seid, 279 connection->initiator_signaling_packet.signal_identifier, true); 280 return; 281 case AVDTP_GENERAL_REJECT_MSG: 282 log_info(" AVDTP_GENERAL_REJECT_MSG signal %s", avdtp_si2str(connection->initiator_signaling_packet.signal_identifier)); 283 avdtp_signaling_emit_general_reject(connection->avdtp_cid, connection->initiator_local_seid, 284 connection->initiator_signaling_packet.signal_identifier, true); 285 return; 286 default: 287 break; 288 } 289 } 290 291 static bool avdtp_initiator_stream_config_subsm_run_signaling(avdtp_connection_t * connection){ 292 switch (connection->initiator_connection_state){ 293 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS: 294 log_info("INT: W2_DISCOVER_SEPS"); 295 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 296 avdtp_initiator_send_signaling_cmd(connection->l2cap_signaling_cid, AVDTP_SI_DISCOVER, connection->initiator_transaction_label); 297 return true; 298 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES: 299 log_info("INT: W2_GET_CAPABILITIES"); 300 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 301 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CAPABILITIES, connection->initiator_transaction_label, connection->initiator_remote_seid); 302 return true; 303 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES: 304 log_info("INT: W2_GET_ALL_CAPABILITIES"); 305 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 306 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_ALL_CAPABILITIES, connection->initiator_transaction_label, connection->initiator_remote_seid); 307 return true; 308 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION: 309 log_info("INT: W4_GET_CONFIGURATION"); 310 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 311 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CONFIGURATION, connection->initiator_transaction_label, connection->initiator_remote_seid); 312 return true; 313 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_DELAY_REPORT: 314 log_info("INT: W4_DELAY_REPORT"); 315 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 316 avdtp_initiator_send_signaling_cmd_delay_report(connection->l2cap_signaling_cid, connection->initiator_transaction_label, 317 connection->initiator_remote_seid, connection->delay_ms); 318 return true; 319 default: 320 break; 321 } 322 return false; 323 } 324 325 static void avdtp_initiator_stream_config_subsm_run_endpoint(avdtp_connection_t * connection, avdtp_stream_endpoint_t * stream_endpoint, avdtp_initiator_stream_endpoint_state_t stream_endpoint_state){ 326 switch (stream_endpoint_state){ 327 case AVDTP_INITIATOR_W2_SET_CONFIGURATION: 328 case AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID:{ 329 if ((stream_endpoint_state == AVDTP_INITIATOR_W2_SET_CONFIGURATION) && (connection->configuration_state != AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED)){ 330 log_info("initiator SM stop sending SET_CONFIGURATION cmd:"); 331 break; 332 } 333 log_info("INT: W2_(RE)CONFIGURATION bitmap, local seid %d, remote seid 0x%02x", connection->initiator_local_seid, connection->initiator_remote_seid); 334 // log_info_hexdump( connection->remote_capabilities.media_codec.media_codec_information, connection->remote_capabilities.media_codec.media_codec_information_len); 335 connection->initiator_signaling_packet.acp_seid = connection->initiator_remote_seid; 336 connection->initiator_signaling_packet.int_seid = connection->initiator_local_seid; 337 338 connection->initiator_signaling_packet.signal_identifier = AVDTP_SI_SET_CONFIGURATION; 339 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE; 340 if (stream_endpoint_state == AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID){ 341 connection->initiator_signaling_packet.signal_identifier = AVDTP_SI_RECONFIGURE; 342 } 343 344 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); 345 l2cap_reserve_packet_buffer(); 346 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 347 uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->initiator_signaling_packet, out_buffer); 348 if ((connection->initiator_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->initiator_signaling_packet.packet_type != AVDTP_END_PACKET)){ 349 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND; 350 log_info("INT: fragmented"); 351 } 352 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 353 break; 354 } 355 case AVDTP_INITIATOR_FRAGMENTATED_COMMAND:{ 356 l2cap_reserve_packet_buffer(); 357 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 358 uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->initiator_signaling_packet, out_buffer); 359 if ((connection->initiator_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->initiator_signaling_packet.packet_type != AVDTP_END_PACKET)){ 360 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND; 361 log_info("INT: fragmented"); 362 } 363 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 364 break; 365 } 366 case AVDTP_INITIATOR_W2_OPEN_STREAM: 367 switch (stream_endpoint->state){ 368 case AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM: 369 log_info("INT: send AVDTP_SI_OPEN signaling to remote, transaction_label %d, remote seid 0x%02x", connection->initiator_transaction_label, connection->initiator_remote_seid); 370 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_OPEN, connection->initiator_transaction_label, connection->initiator_remote_seid); 371 break; 372 default: 373 break; 374 } 375 break; 376 default: 377 break; 378 } 379 } 380 381 void avdtp_initiator_stream_config_subsm_run(avdtp_connection_t *connection) { 382 383 bool sent = avdtp_initiator_stream_config_subsm_run_signaling(connection); 384 if (sent) return; 385 386 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_associated_with_acp_seid(connection->initiator_remote_seid); 387 if (!stream_endpoint){ 388 stream_endpoint = avdtp_get_stream_endpoint_with_seid(connection->initiator_local_seid); 389 } 390 if (!stream_endpoint) return; 391 392 avdtp_initiator_stream_endpoint_state_t stream_endpoint_state = stream_endpoint->initiator_config_state; 393 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER; 394 395 if (stream_endpoint->start_stream){ 396 stream_endpoint->start_stream = 0; 397 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_OPENED){ 398 connection->initiator_local_seid = stream_endpoint->sep.seid; 399 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 400 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_START, connection->initiator_transaction_label++, connection->initiator_remote_seid); 401 return; 402 } 403 } 404 405 if (stream_endpoint->stop_stream){ 406 stream_endpoint->stop_stream = 0; 407 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_OPENED){ 408 connection->initiator_local_seid = stream_endpoint->sep.seid; 409 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 410 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_CLOSE, connection->initiator_transaction_label++, connection->initiator_remote_seid); 411 return; 412 } 413 } 414 415 if (stream_endpoint->abort_stream){ 416 stream_endpoint->abort_stream = 0; 417 switch (stream_endpoint->state){ 418 case AVDTP_STREAM_ENDPOINT_CONFIGURED: 419 case AVDTP_STREAM_ENDPOINT_CLOSING: 420 case AVDTP_STREAM_ENDPOINT_OPENED: 421 case AVDTP_STREAM_ENDPOINT_STREAMING: 422 connection->initiator_local_seid = stream_endpoint->sep.seid; 423 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 424 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 425 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_ABORT, connection->initiator_transaction_label++, connection->initiator_remote_seid); 426 return; 427 default: 428 break; 429 } 430 } 431 432 if (stream_endpoint->suspend_stream){ 433 stream_endpoint->suspend_stream = 0; 434 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING){ 435 connection->initiator_local_seid = stream_endpoint->sep.seid; 436 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 437 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 438 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_SUSPEND, connection->initiator_transaction_label, connection->initiator_remote_seid); 439 return; 440 } 441 } 442 443 if (stream_endpoint->send_stream){ 444 stream_endpoint->send_stream = 0; 445 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING){ 446 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 447 avdtp_streaming_emit_can_send_media_packet_now(stream_endpoint, 448 stream_endpoint->sequence_number); 449 return; 450 } 451 } 452 453 avdtp_initiator_stream_config_subsm_run_endpoint(connection, stream_endpoint, stream_endpoint_state); 454 455 // check fragmentation 456 if ((connection->initiator_signaling_packet.packet_type != AVDTP_SINGLE_PACKET) && (connection->initiator_signaling_packet.packet_type != AVDTP_END_PACKET)){ 457 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 458 } 459 } 460