1 /* 2 * Copyright (C) 2014 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 // ***************************************************************************** 39 // 40 // HSP Audio Gateway 41 // 42 // ***************************************************************************** 43 44 #include "btstack_config.h" 45 46 #include <stdint.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 51 #include "btstack_debug.h" 52 #include "btstack_event.h" 53 #include "btstack_memory.h" 54 #include "btstack_run_loop.h" 55 #include "classic/sdp_server.h" 56 #include "classic/sdp_query_rfcomm.h" 57 #include "hci.h" 58 #include "hci_cmd.h" 59 #include "hci_dump.h" 60 #include "hsp_ag.h" 61 #include "l2cap.h" 62 63 #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" 64 #define HSP_HS_AT_CKPD "AT+CKPD\r\n" 65 #define HSP_AG_OK "\r\nOK\r\n" 66 #define HSP_AG_ERROR "\r\nERROR\r\n" 67 #define HSP_AG_RING "\r\nRING\r\n" 68 #define HSP_MICROPHONE_GAIN "+VGM" 69 #define HSP_SPEAKER_GAIN "+VGS" 70 71 #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" 72 #define HSP_HS_SPEAKER_GAIN "AT+VGS=" 73 74 static const char default_hsp_ag_service_name[] = "Audio Gateway"; 75 76 static bd_addr_t remote; 77 static uint8_t channel_nr = 0; 78 79 static uint16_t mtu; 80 static uint16_t rfcomm_cid = 0; 81 static uint16_t sco_handle = 0; 82 static uint16_t rfcomm_handle = 0; 83 static btstack_timer_source_t hs_timeout; 84 85 static int ag_microphone_gain = -1; 86 static int ag_speaker_gain = -1; 87 static uint8_t ag_ring = 0; 88 static uint8_t ag_send_ok = 0; 89 static uint8_t ag_send_error = 0; 90 static uint8_t ag_num_button_press_received = 0; 91 static uint8_t ag_support_custom_commands = 0; 92 93 static btstack_packet_callback_registration_t hci_event_callback_registration; 94 95 typedef enum { 96 HSP_IDLE, 97 HSP_SDP_QUERY_RFCOMM_CHANNEL, 98 HSP_W4_SDP_EVENT_QUERY_COMPLETE, 99 HSP_W4_RFCOMM_CONNECTED, 100 HSP_W4_RING_ANSWER, 101 HSP_W4_USER_ACTION, 102 HSP_W2_CONNECT_SCO, 103 HSP_W4_SCO_CONNECTED, 104 HSP_ACTIVE, 105 HSP_W2_DISCONNECT_SCO, 106 HSP_W4_SCO_DISCONNECTED, 107 HSP_W2_DISCONNECT_RFCOMM, 108 HSP_W4_RFCOMM_DISCONNECTED, 109 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 110 } hsp_state_t; 111 112 static hsp_state_t hsp_state = HSP_IDLE; 113 114 115 static hsp_ag_callback_t hsp_ag_callback; 116 117 static void hsp_run(); 118 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 119 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 120 121 static void dummy_notify(uint8_t * event, uint16_t size){} 122 123 void hsp_ag_register_packet_handler(hsp_ag_callback_t callback){ 124 if (callback == NULL){ 125 callback = &dummy_notify; 126 } 127 hsp_ag_callback = callback; 128 } 129 130 static void emit_event(uint8_t event_subtype, uint8_t value){ 131 if (!hsp_ag_callback) return; 132 uint8_t event[4]; 133 event[0] = HCI_EVENT_HSP_META; 134 event[1] = sizeof(event) - 2; 135 event[2] = event_subtype; 136 event[3] = value; // status 0 == OK 137 (*hsp_ag_callback)(event, sizeof(event)); 138 } 139 140 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 141 if (!hsp_ag_callback) return; 142 uint8_t event[6]; 143 event[0] = HCI_EVENT_HSP_META; 144 event[1] = sizeof(event) - 2; 145 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 146 event[3] = status; 147 little_endian_store_16(event, 4, handle); 148 (*hsp_ag_callback)(event, sizeof(event)); 149 } 150 151 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 152 uint8_t* attribute; 153 de_create_sequence(service); 154 155 // 0x0000 "Service Record Handle" 156 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle); 157 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 158 159 // 0x0001 "Service Class ID List" 160 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList); 161 attribute = de_push_sequence(service); 162 { 163 // "UUID for PAN Service" 164 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_Headset_AG); 165 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_GenericAudio); 166 } 167 de_pop_sequence(service, attribute); 168 169 // 0x0004 "Protocol Descriptor List" 170 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList); 171 attribute = de_push_sequence(service); 172 { 173 uint8_t* l2cpProtocol = de_push_sequence(attribute); 174 { 175 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol); 176 } 177 de_pop_sequence(attribute, l2cpProtocol); 178 179 uint8_t* rfcomm = de_push_sequence(attribute); 180 { 181 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, SDP_RFCOMMProtocol); // rfcomm_service 182 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 183 } 184 de_pop_sequence(attribute, rfcomm); 185 } 186 de_pop_sequence(service, attribute); 187 188 // 0x0005 "Public Browse Group" 189 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group 190 attribute = de_push_sequence(service); 191 { 192 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup); 193 } 194 de_pop_sequence(service, attribute); 195 196 // 0x0009 "Bluetooth Profile Descriptor List" 197 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList); 198 attribute = de_push_sequence(service); 199 { 200 uint8_t *sppProfile = de_push_sequence(attribute); 201 { 202 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, SDP_HSP); 203 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 204 } 205 de_pop_sequence(attribute, sppProfile); 206 } 207 de_pop_sequence(service, attribute); 208 209 // 0x0100 "Service Name" 210 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 211 if (name){ 212 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 213 } else { 214 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 215 } 216 } 217 218 static int hsp_ag_send_str_over_rfcomm(uint16_t cid, char * command){ 219 if (!rfcomm_can_send_packet_now(cid)) return 1; 220 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 221 if (err){ 222 log_error("rfcomm_send_internal -> error 0X%02x", err); 223 return err; 224 } 225 return err; 226 } 227 228 void hsp_ag_enable_custom_commands(int enable){ 229 ag_support_custom_commands = enable; 230 } 231 232 int hsp_ag_send_result(char * result){ 233 if (!ag_support_custom_commands) return 1; 234 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 235 } 236 237 static void hsp_ag_reset_state(void){ 238 hsp_state = HSP_IDLE; 239 240 rfcomm_cid = 0; 241 rfcomm_handle = 0; 242 sco_handle = 0; 243 244 ag_send_ok = 0; 245 ag_send_error = 0; 246 ag_ring = 0; 247 248 ag_num_button_press_received = 0; 249 ag_support_custom_commands = 0; 250 251 ag_microphone_gain = -1; 252 ag_speaker_gain = -1; 253 } 254 255 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 256 // register for HCI events 257 hci_event_callback_registration.callback = &packet_handler; 258 hci_add_event_handler(&hci_event_callback_registration); 259 260 // init L2CAP 261 l2cap_init(); 262 263 rfcomm_init(); 264 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 265 266 hsp_ag_reset_state(); 267 } 268 269 void hsp_ag_connect(bd_addr_t bd_addr){ 270 if (hsp_state != HSP_IDLE) return; 271 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 272 memcpy(remote, bd_addr, 6); 273 hsp_run(); 274 } 275 276 void hsp_ag_disconnect(void){ 277 switch (hsp_state){ 278 case HSP_ACTIVE: 279 hsp_state = HSP_W2_DISCONNECT_SCO; 280 break; 281 case HSP_W2_CONNECT_SCO: 282 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 283 break; 284 285 case HSP_W4_RFCOMM_CONNECTED: 286 case HSP_W4_SCO_CONNECTED: 287 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 288 break; 289 default: 290 return; 291 } 292 hsp_run(); 293 } 294 295 void hsp_ag_set_microphone_gain(uint8_t gain){ 296 if (gain < 0 || gain >15) { 297 log_error("Gain must be in interval [0..15], it is given %d", gain); 298 return; 299 } 300 ag_microphone_gain = gain; 301 hsp_run(); 302 } 303 304 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 305 void hsp_ag_set_speaker_gain(uint8_t gain){ 306 if (gain < 0 || gain >15) { 307 log_error("Gain must be in interval [0..15], it is given %d", gain); 308 return; 309 } 310 ag_speaker_gain = gain; 311 hsp_run(); 312 } 313 314 static void hsp_timeout_handler(btstack_timer_source_t * timer){ 315 ag_ring = 1; 316 } 317 318 static void hsp_timeout_start(void){ 319 btstack_run_loop_remove_timer(&hs_timeout); 320 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_timeout_handler); 321 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 322 btstack_run_loop_add_timer(&hs_timeout); 323 } 324 325 static void hsp_timeout_stop(void){ 326 btstack_run_loop_remove_timer(&hs_timeout); 327 } 328 329 void hsp_ag_start_ringing(void){ 330 if (hsp_state != HSP_W2_CONNECT_SCO) return; 331 ag_ring = 1; 332 hsp_state = HSP_W4_RING_ANSWER; 333 hsp_timeout_start(); 334 } 335 336 void hsp_ag_stop_ringing(void){ 337 ag_ring = 0; 338 ag_num_button_press_received = 0; 339 hsp_state = HSP_W2_CONNECT_SCO; 340 hsp_timeout_stop(); 341 } 342 343 static void hsp_run(void){ 344 int err; 345 346 if (ag_send_ok){ 347 ag_send_ok = 0; 348 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 349 if (err){ 350 ag_send_ok = 1; 351 } 352 return; 353 } 354 355 if (ag_send_error){ 356 ag_send_error = 0; 357 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 358 if (err) { 359 ag_send_error = 1; 360 } 361 return; 362 } 363 364 switch (hsp_state){ 365 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 366 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 367 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), SDP_HSP); 368 sdp_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, SDP_HSP); 369 break; 370 371 case HSP_W4_RING_ANSWER: 372 if (ag_ring){ 373 ag_ring = 0; 374 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 375 if (err) { 376 ag_ring = 1; 377 } 378 break; 379 } 380 381 if (!ag_num_button_press_received) break; 382 ag_send_ok = 0; 383 384 ag_num_button_press_received = 0; 385 hsp_state = HSP_W2_CONNECT_SCO; 386 387 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 388 if (err) { 389 hsp_state = HSP_W4_RING_ANSWER; 390 ag_num_button_press_received = 1; 391 } 392 break; 393 case HSP_W2_CONNECT_SCO: 394 if (!hci_can_send_command_packet_now()) break; 395 hsp_state = HSP_W4_SCO_CONNECTED; 396 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 397 break; 398 399 case HSP_W2_DISCONNECT_SCO: 400 ag_num_button_press_received = 0; 401 402 hsp_state = HSP_W4_SCO_DISCONNECTED; 403 gap_disconnect(sco_handle); 404 break; 405 406 case HSP_W2_DISCONNECT_RFCOMM: 407 hsp_state = HSP_W4_RFCOMM_DISCONNECTED; 408 rfcomm_disconnect(rfcomm_cid); 409 break; 410 case HSP_ACTIVE: 411 412 if (ag_microphone_gain >= 0){ 413 int gain = ag_microphone_gain; 414 ag_microphone_gain = -1; 415 char buffer[10]; 416 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 417 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 418 if (err) { 419 ag_microphone_gain = gain; 420 } 421 break; 422 } 423 424 if (ag_speaker_gain >= 0){ 425 int gain = ag_speaker_gain; 426 ag_speaker_gain = -1; 427 char buffer[10]; 428 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 429 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 430 if (err) { 431 ag_speaker_gain = gain; 432 } 433 break; 434 } 435 break; 436 default: 437 break; 438 } 439 } 440 441 442 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 443 // log_info("packet_handler type %u, packet[0] %x", packet_type, packet[0]); 444 if (packet_type == RFCOMM_DATA_PACKET){ 445 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 446 size--; 447 packet++; 448 } 449 450 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 451 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 452 ag_num_button_press_received++; 453 ag_send_ok = 1; 454 if (hsp_state == HSP_ACTIVE && ag_num_button_press_received >=2){ 455 ag_num_button_press_received = 0; 456 hsp_state = HSP_W2_DISCONNECT_SCO; 457 } 458 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 459 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 460 ag_send_ok = 1; 461 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 462 463 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 464 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 465 ag_send_ok = 1; 466 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 467 468 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 469 ag_send_error = 1; 470 if (!hsp_ag_callback) return; 471 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 472 uint8_t * event = packet - 3; 473 event[0] = HCI_EVENT_HSP_META; 474 event[1] = size + 1; 475 event[2] = HSP_SUBEVENT_HS_COMMAND; 476 (*hsp_ag_callback)(event, size+3); 477 } 478 479 hsp_run(); 480 return; 481 } 482 483 if (packet_type != HCI_EVENT_PACKET) return; 484 uint8_t event = packet[0]; 485 bd_addr_t event_addr; 486 uint16_t handle; 487 488 switch (event) { 489 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 490 int index = 2; 491 uint8_t status = packet[index++]; 492 sco_handle = little_endian_read_16(packet, index); 493 index+=2; 494 bd_addr_t address; 495 memcpy(address, &packet[index], 6); 496 index+=6; 497 uint8_t link_type = packet[index++]; 498 uint8_t transmission_interval = packet[index++]; // measured in slots 499 uint8_t retransmission_interval = packet[index++];// measured in slots 500 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 501 index+=2; 502 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 503 index+=2; 504 uint8_t air_mode = packet[index]; 505 506 if (status != 0){ 507 log_error("(e)SCO Connection failed, status %u", status); 508 emit_event_audio_connected(status, sco_handle); 509 break; 510 } 511 switch (link_type){ 512 case 0x00: 513 log_info("SCO Connection established."); 514 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 515 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 516 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 517 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 518 break; 519 case 0x02: 520 log_info("eSCO Connection established."); 521 break; 522 default: 523 log_error("(e)SCO reserved link_type 0x%2x", link_type); 524 break; 525 } 526 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 527 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 528 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 529 530 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 531 hsp_state = HSP_W2_DISCONNECT_SCO; 532 break; 533 } 534 535 hsp_state = HSP_ACTIVE; 536 emit_event_audio_connected(status, sco_handle); 537 break; 538 } 539 540 case RFCOMM_EVENT_INCOMING_CONNECTION: 541 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 542 if (hsp_state != HSP_IDLE) return; 543 544 reverse_bd_addr(&packet[2], event_addr); 545 rfcomm_cid = little_endian_read_16(packet, 9); 546 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 547 rfcomm_accept_connection(rfcomm_cid); 548 549 hsp_state = HSP_W4_RFCOMM_CONNECTED; 550 break; 551 552 case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE: 553 log_info("RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE packet_handler type %u, packet[0] %x", packet_type, packet[0]); 554 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 555 if (packet[2]) { 556 log_info("RFCOMM channel open failed, status %u§", packet[2]); 557 hsp_ag_reset_state(); 558 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, packet[2]); 559 } else { 560 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 561 rfcomm_handle = little_endian_read_16(packet, 9); 562 rfcomm_cid = little_endian_read_16(packet, 12); 563 mtu = little_endian_read_16(packet, 14); 564 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 565 566 switch (hsp_state){ 567 case HSP_W4_RFCOMM_CONNECTED: 568 ag_num_button_press_received = 0; 569 hsp_state = HSP_W2_CONNECT_SCO; 570 break; 571 case HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN: 572 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 573 break; 574 default: 575 log_error("no valid state"); 576 break; 577 } 578 } 579 break; 580 581 case HCI_EVENT_DISCONNECTION_COMPLETE: 582 handle = little_endian_read_16(packet,3); 583 if (handle == sco_handle){ 584 log_info("SCO disconnected, w2 disconnect RFCOMM"); 585 sco_handle = 0; 586 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 587 break; 588 } 589 break; 590 591 case RFCOMM_EVENT_CHANNEL_CLOSED: 592 log_info("RFCOMM channel closed"); 593 hsp_ag_reset_state(); 594 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 595 break; 596 default: 597 break; 598 } 599 hsp_run(); 600 } 601 602 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 603 switch (packet[0]){ 604 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 605 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 606 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 607 break; 608 case SDP_EVENT_QUERY_COMPLETE: 609 if (channel_nr > 0){ 610 hsp_state = HSP_W4_RFCOMM_CONNECTED; 611 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 612 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 613 break; 614 } 615 hsp_ag_reset_state(); 616 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 617 if (sdp_event_query_complete_get_status(packet)){ 618 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 619 } else { 620 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 621 } 622 break; 623 default: 624 break; 625 } 626 } 627 628 629