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 <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "btstack.h" 46 #include "classic/avdtp.h" 47 #include "classic/avdtp_util.h" 48 #include "classic/avdtp_initiator.h" 49 50 static int avdtp_initiator_send_signaling_cmd(uint16_t cid, avdtp_signal_identifier_t identifier, uint8_t transaction_label){ 51 uint8_t command[2]; 52 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_CMD_MSG); 53 command[1] = (uint8_t)identifier; 54 return l2cap_send(cid, command, sizeof(command)); 55 } 56 57 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){ 58 uint8_t command[3]; 59 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_CMD_MSG); 60 command[1] = (uint8_t)identifier; 61 command[2] = sep_id << 2; 62 return l2cap_send(cid, command, sizeof(command)); 63 } 64 65 static int avdtp_initiator_send_signaling_cmd_delay_report(uint16_t cid, uint8_t transaction_label, uint8_t sep_id, uint16_t delay_ms){ 66 uint8_t command[5]; 67 command[0] = avdtp_header(transaction_label, AVDTP_SINGLE_PACKET, AVDTP_CMD_MSG); 68 command[1] = AVDTP_SI_DELAYREPORT; 69 command[2] = sep_id << 2; 70 big_endian_store_16(command, 3, delay_ms); 71 return l2cap_send(cid, command, sizeof(command)); 72 } 73 74 void avdtp_initiator_stream_config_subsm(avdtp_connection_t * connection, uint8_t *packet, uint16_t size, int offset, avdtp_context_t * context){ 75 // int status = 0; 76 avdtp_stream_endpoint_t * stream_endpoint = NULL; 77 78 avdtp_sep_t sep; 79 if (connection->initiator_connection_state == AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER) { 80 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE; 81 } else { 82 stream_endpoint = avdtp_stream_endpoint_associated_with_acp_seid(connection->remote_seid, context); 83 if (!stream_endpoint){ 84 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->local_seid, context); 85 } 86 if (!stream_endpoint) return; 87 sep.seid = connection->remote_seid; 88 89 if (stream_endpoint->initiator_config_state != AVDTP_INITIATOR_W4_ANSWER) return; 90 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 91 } 92 93 switch (connection->signaling_packet.message_type){ 94 case AVDTP_RESPONSE_ACCEPT_MSG: 95 switch (connection->signaling_packet.signal_identifier){ 96 case AVDTP_SI_DISCOVER:{ 97 if (connection->signaling_packet.transaction_label != connection->initiator_transaction_label){ 98 log_info(" unexpected transaction label, got %d, expected %d", connection->signaling_packet.transaction_label, connection->initiator_transaction_label); 99 // status = BAD_HEADER_FORMAT; 100 break; 101 } 102 103 if (size == 3){ 104 log_info(" ERROR code %02x", packet[offset]); 105 break; 106 } 107 108 int i; 109 for (i = offset; i < size; i += 2){ 110 sep.seid = packet[i] >> 2; 111 offset++; 112 if (sep.seid < 0x01 || sep.seid > 0x3E){ 113 log_info(" invalid sep id"); 114 // status = BAD_ACP_SEID; 115 break; 116 } 117 sep.in_use = (packet[i] >> 1) & 0x01; 118 sep.media_type = (avdtp_media_type_t)(packet[i+1] >> 4); 119 sep.type = (avdtp_sep_type_t)((packet[i+1] >> 3) & 0x01); 120 avdtp_signaling_emit_sep(context->avdtp_callback, connection->avdtp_cid, sep); 121 } 122 avdtp_signaling_emit_sep_done(context->avdtp_callback, connection->avdtp_cid); 123 break; 124 } 125 126 case AVDTP_SI_GET_CAPABILITIES: 127 case AVDTP_SI_GET_ALL_CAPABILITIES: 128 sep.registered_service_categories = avdtp_unpack_service_capabilities(connection, &sep.capabilities, packet+offset, size-offset); 129 avdtp_emit_capabilities(context->avdtp_callback, connection->avdtp_cid, connection->local_seid, connection->remote_seid, &sep.capabilities, sep.registered_service_categories); 130 break; 131 case AVDTP_SI_DELAYREPORT: 132 avdtp_signaling_emit_delay(context->avdtp_callback, connection->avdtp_cid, connection->local_seid, little_endian_read_16(packet, offset)); 133 break; 134 case AVDTP_SI_GET_CONFIGURATION: 135 // sep.configured_service_categories = avdtp_unpack_service_capabilities(connection, &sep.configuration, packet+offset, size-offset); 136 // if (get_bit16(sep.configured_service_categories, AVDTP_MEDIA_CODEC)){ 137 // switch (sep.configuration.media_codec.media_codec_type){ 138 // case AVDTP_CODEC_SBC: 139 // avdtp_signaling_emit_media_codec_sbc_configuration(context->avdtp_callback, connection->avdtp_cid, connection->local_seid, connection->remote_seid, 140 // sep.configuration.media_codec.media_type, sep.configuration.media_codec.media_codec_information); 141 // break; 142 // default: 143 // avdtp_signaling_emit_media_codec_other_configuration(context->avdtp_callback, connection->avdtp_cid, connection->local_seid, connection->remote_seid, sep.configuration.media_codec); 144 // break; 145 // } 146 // } 147 break; 148 149 case AVDTP_SI_RECONFIGURE: 150 if (!stream_endpoint){ 151 log_error("AVDTP_SI_RECONFIGURE: stream endpoint is null"); 152 break; 153 } 154 // copy sbc media codec info 155 stream_endpoint->remote_sep.configured_service_categories |= stream_endpoint->remote_configuration_bitmap; 156 stream_endpoint->remote_sep.configuration = stream_endpoint->remote_configuration; 157 memcpy(stream_endpoint->media_codec_sbc_info, stream_endpoint->remote_configuration.media_codec.media_codec_information, 4); 158 stream_endpoint->remote_sep.configuration.media_codec.media_codec_information = stream_endpoint->media_codec_sbc_info; 159 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 160 break; 161 162 case AVDTP_SI_SET_CONFIGURATION:{ 163 avdtp_configuration_timer_stop(connection); 164 if (!stream_endpoint){ 165 log_error("AVDTP_SI_SET_CONFIGURATION: stream endpoint is null"); 166 break; 167 } 168 sep.configured_service_categories = stream_endpoint->remote_configuration_bitmap; 169 sep.configuration = stream_endpoint->remote_configuration; 170 sep.in_use = 1; 171 172 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURED; 173 stream_endpoint->remote_sep = sep; 174 stream_endpoint->connection = connection; 175 176 log_info("INT: configured remote seid %d, to %p", stream_endpoint->remote_sep.seid, stream_endpoint); 177 178 switch (stream_endpoint->media_codec_type){ 179 case AVDTP_CODEC_SBC: 180 avdtp_signaling_emit_media_codec_sbc_configuration(context->avdtp_callback, connection->avdtp_cid, connection->local_seid, connection->remote_seid, 181 stream_endpoint->media_type, stream_endpoint->media_codec_sbc_info); 182 break; 183 default: 184 // TODO: we don\t have codec info to emit config 185 avdtp_signaling_emit_media_codec_other_configuration(context->avdtp_callback, connection->avdtp_cid, connection->local_seid, connection->remote_seid, sep.configuration.media_codec); 186 break; 187 } 188 break; 189 } 190 191 case AVDTP_SI_OPEN: 192 if (!stream_endpoint){ 193 log_error("AVDTP_SI_OPEN: stream endpoint is null"); 194 break; 195 } 196 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM) { 197 log_error("AVDTP_SI_OPEN in wrong stream endpoint state"); 198 return; 199 } 200 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED; 201 connection->local_seid = stream_endpoint->sep.seid; 202 l2cap_create_channel(context->packet_handler, connection->remote_addr, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, NULL); 203 return; 204 case AVDTP_SI_START: 205 if (!stream_endpoint){ 206 log_error("AVDTP_SI_START: stream endpoint is null"); 207 break; 208 } 209 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_OPENED) { 210 log_error("AVDTP_SI_START in wrong stream endpoint state"); 211 return; 212 } 213 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 214 break; 215 case AVDTP_SI_SUSPEND: 216 if (!stream_endpoint){ 217 log_error("AVDTP_SI_SUSPEND: stream endpoint is null"); 218 break; 219 } 220 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_STREAMING) { 221 log_error("AVDTP_SI_SUSPEND in wrong stream endpoint state"); 222 return; 223 } 224 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 225 break; 226 case AVDTP_SI_CLOSE: 227 if (!stream_endpoint){ 228 log_error("AVDTP_SI_CLOSE: stream endpoint is null"); 229 break; 230 } 231 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CLOSING; 232 break; 233 case AVDTP_SI_ABORT: 234 if (!stream_endpoint){ 235 log_error("AVDTP_SI_ABORT: stream endpoint is null"); 236 break; 237 } 238 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 239 break; 240 default: 241 log_info(" AVDTP_RESPONSE_ACCEPT_MSG, signal %d not implemented", connection->signaling_packet.signal_identifier); 242 break; 243 } 244 avdtp_signaling_emit_accept(context->avdtp_callback, connection->avdtp_cid, 0, connection->signaling_packet.signal_identifier); 245 connection->initiator_transaction_label++; 246 break; 247 case AVDTP_RESPONSE_REJECT_MSG: 248 switch (connection->signaling_packet.signal_identifier){ 249 case AVDTP_SI_SET_CONFIGURATION: 250 connection->is_initiator = 0; 251 log_info("Received reject for set configuration, role changed from initiator to acceptor. Start timer."); 252 avdtp_configuration_timer_start(connection); 253 break; 254 default: 255 break; 256 } 257 log_info(" AVDTP_RESPONSE_REJECT_MSG signal %d", connection->signaling_packet.signal_identifier); 258 avdtp_signaling_emit_reject(context->avdtp_callback, connection->avdtp_cid, connection->local_seid, connection->signaling_packet.signal_identifier); 259 return; 260 case AVDTP_GENERAL_REJECT_MSG: 261 log_info(" AVDTP_GENERAL_REJECT_MSG signal %d", connection->signaling_packet.signal_identifier); 262 avdtp_signaling_emit_general_reject(context->avdtp_callback, connection->avdtp_cid, connection->local_seid, connection->signaling_packet.signal_identifier); 263 return; 264 default: 265 break; 266 } 267 } 268 269 void avdtp_initiator_stream_config_subsm_run(avdtp_connection_t * connection, avdtp_context_t * context){ 270 int sent = 1; 271 switch (connection->initiator_connection_state){ 272 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS: 273 log_info("INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS"); 274 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 275 avdtp_initiator_send_signaling_cmd(connection->l2cap_signaling_cid, AVDTP_SI_DISCOVER, connection->initiator_transaction_label); 276 break; 277 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES: 278 log_info("INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES"); 279 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 280 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CAPABILITIES, connection->initiator_transaction_label, connection->remote_seid); 281 break; 282 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES: 283 log_info("INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES"); 284 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 285 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_ALL_CAPABILITIES, connection->initiator_transaction_label, connection->remote_seid); 286 break; 287 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION: 288 log_info("INT: AVDTP_INITIATOR_W4_GET_CONFIGURATION"); 289 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 290 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CONFIGURATION, connection->initiator_transaction_label, connection->remote_seid); 291 break; 292 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_DELAY_REPORT: 293 log_info("INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_DELAY_REPORT"); 294 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER; 295 avdtp_initiator_send_signaling_cmd_delay_report(connection->l2cap_signaling_cid, connection->initiator_transaction_label, 296 connection->remote_seid, connection->delay_ms); 297 break; 298 default: 299 sent = 0; 300 break; 301 } 302 303 if (sent) return; 304 sent = 1; 305 306 avdtp_stream_endpoint_t * stream_endpoint = NULL; 307 308 stream_endpoint = avdtp_stream_endpoint_associated_with_acp_seid(connection->remote_seid, context); 309 if (!stream_endpoint){ 310 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->local_seid, context); 311 } 312 if (!stream_endpoint) return; 313 314 avdtp_initiator_stream_endpoint_state_t stream_endpoint_state = stream_endpoint->initiator_config_state; 315 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER; 316 317 if (stream_endpoint->start_stream){ 318 stream_endpoint->start_stream = 0; 319 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_OPENED){ 320 connection->local_seid = stream_endpoint->sep.seid; 321 connection->remote_seid = stream_endpoint->remote_sep.seid; 322 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_START, connection->initiator_transaction_label++, connection->remote_seid); 323 return; 324 } 325 return; 326 } 327 328 if (stream_endpoint->stop_stream){ 329 stream_endpoint->stop_stream = 0; 330 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_OPENED){ 331 connection->local_seid = stream_endpoint->sep.seid; 332 connection->remote_seid = stream_endpoint->remote_sep.seid; 333 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_CLOSE, connection->initiator_transaction_label++, connection->remote_seid); 334 return; 335 } 336 } 337 338 if (stream_endpoint->abort_stream){ 339 stream_endpoint->abort_stream = 0; 340 switch (stream_endpoint->state){ 341 case AVDTP_STREAM_ENDPOINT_CONFIGURED: 342 case AVDTP_STREAM_ENDPOINT_CLOSING: 343 case AVDTP_STREAM_ENDPOINT_OPENED: 344 case AVDTP_STREAM_ENDPOINT_STREAMING: 345 connection->local_seid = stream_endpoint->sep.seid; 346 connection->remote_seid = stream_endpoint->remote_sep.seid; 347 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING; 348 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_ABORT, connection->initiator_transaction_label++, connection->remote_seid); 349 return; 350 default: 351 break; 352 } 353 } 354 355 if (stream_endpoint->suspend_stream){ 356 stream_endpoint->suspend_stream = 0; 357 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING){ 358 connection->local_seid = stream_endpoint->sep.seid; 359 connection->remote_seid = stream_endpoint->remote_sep.seid; 360 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 361 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_SUSPEND, connection->initiator_transaction_label, connection->remote_seid); 362 return; 363 } 364 } 365 366 if (stream_endpoint->send_stream){ 367 stream_endpoint->send_stream = 0; 368 if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING){ 369 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING; 370 avdtp_streaming_emit_can_send_media_packet_now(context->avdtp_callback, stream_endpoint->l2cap_media_cid, stream_endpoint->sep.seid, stream_endpoint->sequence_number); 371 return; 372 } 373 } 374 375 switch (stream_endpoint_state){ 376 case AVDTP_INITIATOR_W2_SET_CONFIGURATION: 377 case AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID:{ 378 if (stream_endpoint_state == AVDTP_INITIATOR_W2_SET_CONFIGURATION && !connection->is_initiator){ 379 log_info("initiator SM stop sending SET_CONFIGURATION cmd: current role is acceptor"); 380 connection->is_configuration_initiated_locally = 0; 381 break; 382 } 383 log_info("initiator SM prepare SET_CONFIGURATION cmd"); 384 connection->is_configuration_initiated_locally = 1; 385 log_info("INT: AVDTP_INITIATOR_W2_(RE)CONFIGURATION bitmap, int seid %d, acp seid %d", connection->local_seid, connection->remote_seid); 386 // log_info_hexdump( connection->remote_capabilities.media_codec.media_codec_information, connection->remote_capabilities.media_codec.media_codec_information_len); 387 connection->signaling_packet.acp_seid = connection->remote_seid; 388 connection->signaling_packet.int_seid = connection->local_seid; 389 390 connection->signaling_packet.signal_identifier = AVDTP_SI_SET_CONFIGURATION; 391 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE; 392 if (stream_endpoint_state == AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID){ 393 connection->signaling_packet.signal_identifier = AVDTP_SI_RECONFIGURE; 394 } 395 396 avdtp_prepare_capabilities(&connection->signaling_packet, connection->initiator_transaction_label, stream_endpoint->remote_configuration_bitmap, stream_endpoint->remote_configuration, connection->signaling_packet.signal_identifier); 397 l2cap_reserve_packet_buffer(); 398 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 399 uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->signaling_packet, out_buffer); 400 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 401 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND; 402 log_info("INT: fragmented"); 403 } 404 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 405 break; 406 } 407 case AVDTP_INITIATOR_FRAGMENTATED_COMMAND:{ 408 l2cap_reserve_packet_buffer(); 409 uint8_t * out_buffer = l2cap_get_outgoing_buffer(); 410 uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->signaling_packet, out_buffer); 411 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 412 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND; 413 log_info("INT: fragmented"); 414 } 415 l2cap_send_prepared(connection->l2cap_signaling_cid, pos); 416 break; 417 } 418 case AVDTP_INITIATOR_W2_OPEN_STREAM: 419 switch (stream_endpoint->state){ 420 case AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM: 421 log_info("INT: AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM"); 422 avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_OPEN, connection->initiator_transaction_label, connection->remote_seid); 423 break; 424 default: 425 sent = 0; 426 break; 427 } 428 break; 429 default: 430 sent = 0; 431 break; 432 } 433 434 // check fragmentation 435 if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){ 436 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 437 } 438 } 439