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_client_rfcomm.h" 57 #include "classic/sdp_util.h" 58 #include "hci.h" 59 #include "hci_cmd.h" 60 #include "hci_dump.h" 61 #include "hsp_ag.h" 62 #include "l2cap.h" 63 64 #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" 65 #define HSP_HS_AT_CKPD "AT+CKPD\r\n" 66 #define HSP_AG_OK "\r\nOK\r\n" 67 #define HSP_AG_ERROR "\r\nERROR\r\n" 68 #define HSP_AG_RING "\r\nRING\r\n" 69 #define HSP_MICROPHONE_GAIN "+VGM" 70 #define HSP_SPEAKER_GAIN "+VGS" 71 72 #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" 73 #define HSP_HS_SPEAKER_GAIN "AT+VGS=" 74 75 static const char default_hsp_ag_service_name[] = "Audio Gateway"; 76 77 static bd_addr_t remote; 78 static uint8_t channel_nr = 0; 79 80 static uint16_t mtu; 81 static uint16_t rfcomm_cid = 0; 82 static uint16_t sco_handle = 0; 83 static uint16_t rfcomm_handle = 0; 84 static btstack_timer_source_t hs_timeout; 85 86 static int ag_microphone_gain = -1; 87 static int ag_speaker_gain = -1; 88 static uint8_t ag_ring = 0; 89 static uint8_t ag_send_ok = 0; 90 static uint8_t ag_send_error = 0; 91 static uint8_t ag_num_button_press_received = 0; 92 static uint8_t ag_support_custom_commands = 0; 93 94 static btstack_packet_callback_registration_t hci_event_callback_registration; 95 96 typedef enum { 97 HSP_IDLE, 98 HSP_SDP_QUERY_RFCOMM_CHANNEL, 99 HSP_W4_SDP_EVENT_QUERY_COMPLETE, 100 HSP_W4_RFCOMM_CONNECTED, 101 HSP_W4_RING_ANSWER, 102 HSP_W4_USER_ACTION, 103 HSP_W2_CONNECT_SCO, 104 HSP_W4_SCO_CONNECTED, 105 HSP_ACTIVE, 106 HSP_W2_DISCONNECT_SCO, 107 HSP_W4_SCO_DISCONNECTED, 108 HSP_W2_DISCONNECT_RFCOMM, 109 HSP_W4_RFCOMM_DISCONNECTED, 110 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 111 } hsp_state_t; 112 113 static hsp_state_t hsp_state = HSP_IDLE; 114 115 116 static hsp_ag_callback_t hsp_ag_callback; 117 118 static void hsp_run(); 119 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 120 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 121 122 static void dummy_notify(uint8_t * event, uint16_t size){} 123 124 void hsp_ag_register_packet_handler(hsp_ag_callback_t callback){ 125 if (callback == NULL){ 126 callback = &dummy_notify; 127 } 128 hsp_ag_callback = callback; 129 } 130 131 static void emit_event(uint8_t event_subtype, uint8_t value){ 132 if (!hsp_ag_callback) return; 133 uint8_t event[4]; 134 event[0] = HCI_EVENT_HSP_META; 135 event[1] = sizeof(event) - 2; 136 event[2] = event_subtype; 137 event[3] = value; // status 0 == OK 138 (*hsp_ag_callback)(event, sizeof(event)); 139 } 140 141 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 142 if (!hsp_ag_callback) return; 143 uint8_t event[6]; 144 event[0] = HCI_EVENT_HSP_META; 145 event[1] = sizeof(event) - 2; 146 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 147 event[3] = status; 148 little_endian_store_16(event, 4, handle); 149 (*hsp_ag_callback)(event, sizeof(event)); 150 } 151 152 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 153 uint8_t* attribute; 154 de_create_sequence(service); 155 156 // 0x0000 "Service Record Handle" 157 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle); 158 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 159 160 // 0x0001 "Service Class ID List" 161 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList); 162 attribute = de_push_sequence(service); 163 { 164 // "UUID for PAN Service" 165 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_Headset_AG); 166 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_GenericAudio); 167 } 168 de_pop_sequence(service, attribute); 169 170 // 0x0004 "Protocol Descriptor List" 171 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList); 172 attribute = de_push_sequence(service); 173 { 174 uint8_t* l2cpProtocol = de_push_sequence(attribute); 175 { 176 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol); 177 } 178 de_pop_sequence(attribute, l2cpProtocol); 179 180 uint8_t* rfcomm = de_push_sequence(attribute); 181 { 182 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, SDP_RFCOMMProtocol); // rfcomm_service 183 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 184 } 185 de_pop_sequence(attribute, rfcomm); 186 } 187 de_pop_sequence(service, attribute); 188 189 // 0x0005 "Public Browse Group" 190 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group 191 attribute = de_push_sequence(service); 192 { 193 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup); 194 } 195 de_pop_sequence(service, attribute); 196 197 // 0x0009 "Bluetooth Profile Descriptor List" 198 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList); 199 attribute = de_push_sequence(service); 200 { 201 uint8_t *sppProfile = de_push_sequence(attribute); 202 { 203 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, SDP_HSP); 204 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 205 } 206 de_pop_sequence(attribute, sppProfile); 207 } 208 de_pop_sequence(service, attribute); 209 210 // 0x0100 "Service Name" 211 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 212 if (name){ 213 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 214 } else { 215 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 216 } 217 } 218 219 static int hsp_ag_send_str_over_rfcomm(uint16_t cid, char * command){ 220 if (!rfcomm_can_send_packet_now(cid)) return 1; 221 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 222 if (err){ 223 log_error("rfcomm_send_internal -> error 0X%02x", err); 224 return err; 225 } 226 return err; 227 } 228 229 void hsp_ag_enable_custom_commands(int enable){ 230 ag_support_custom_commands = enable; 231 } 232 233 int hsp_ag_send_result(char * result){ 234 if (!ag_support_custom_commands) return 1; 235 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 236 } 237 238 static void hsp_ag_reset_state(void){ 239 hsp_state = HSP_IDLE; 240 241 rfcomm_cid = 0; 242 rfcomm_handle = 0; 243 sco_handle = 0; 244 245 ag_send_ok = 0; 246 ag_send_error = 0; 247 ag_ring = 0; 248 249 ag_num_button_press_received = 0; 250 ag_support_custom_commands = 0; 251 252 ag_microphone_gain = -1; 253 ag_speaker_gain = -1; 254 } 255 256 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 257 // register for HCI events 258 hci_event_callback_registration.callback = &packet_handler; 259 hci_add_event_handler(&hci_event_callback_registration); 260 261 // init L2CAP 262 l2cap_init(); 263 264 rfcomm_init(); 265 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 266 267 hsp_ag_reset_state(); 268 } 269 270 void hsp_ag_connect(bd_addr_t bd_addr){ 271 if (hsp_state != HSP_IDLE) return; 272 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 273 memcpy(remote, bd_addr, 6); 274 hsp_run(); 275 } 276 277 void hsp_ag_disconnect(void){ 278 switch (hsp_state){ 279 case HSP_ACTIVE: 280 hsp_state = HSP_W2_DISCONNECT_SCO; 281 break; 282 case HSP_W2_CONNECT_SCO: 283 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 284 break; 285 286 case HSP_W4_RFCOMM_CONNECTED: 287 case HSP_W4_SCO_CONNECTED: 288 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 289 break; 290 default: 291 return; 292 } 293 hsp_run(); 294 } 295 296 void hsp_ag_set_microphone_gain(uint8_t gain){ 297 if (gain < 0 || gain >15) { 298 log_error("Gain must be in interval [0..15], it is given %d", gain); 299 return; 300 } 301 ag_microphone_gain = gain; 302 hsp_run(); 303 } 304 305 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 306 void hsp_ag_set_speaker_gain(uint8_t gain){ 307 if (gain < 0 || gain >15) { 308 log_error("Gain must be in interval [0..15], it is given %d", gain); 309 return; 310 } 311 ag_speaker_gain = gain; 312 hsp_run(); 313 } 314 315 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 316 ag_ring = 1; 317 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 318 btstack_run_loop_add_timer(&hs_timeout); 319 } 320 321 static void hsp_ringing_timer_start(void){ 322 btstack_run_loop_remove_timer(&hs_timeout); 323 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 324 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 325 btstack_run_loop_add_timer(&hs_timeout); 326 } 327 328 static void hsp_ringing_timer_stop(void){ 329 btstack_run_loop_remove_timer(&hs_timeout); 330 } 331 332 void hsp_ag_start_ringing(void){ 333 if (hsp_state != HSP_W2_CONNECT_SCO) return; 334 ag_ring = 1; 335 hsp_state = HSP_W4_RING_ANSWER; 336 hsp_ringing_timer_start(); 337 } 338 339 void hsp_ag_stop_ringing(void){ 340 ag_ring = 0; 341 ag_num_button_press_received = 0; 342 hsp_state = HSP_W2_CONNECT_SCO; 343 hsp_ringing_timer_stop(); 344 } 345 346 static void hsp_run(void){ 347 int err; 348 349 if (ag_send_ok){ 350 ag_send_ok = 0; 351 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 352 if (err){ 353 ag_send_ok = 1; 354 } 355 return; 356 } 357 358 if (ag_send_error){ 359 ag_send_error = 0; 360 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 361 if (err) { 362 ag_send_error = 1; 363 } 364 return; 365 } 366 367 switch (hsp_state){ 368 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 369 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 370 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), SDP_HSP); 371 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, SDP_HSP); 372 break; 373 374 case HSP_W4_RING_ANSWER: 375 if (ag_ring){ 376 ag_ring = 0; 377 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 378 if (err) { 379 ag_ring = 1; 380 } 381 break; 382 } 383 384 if (!ag_num_button_press_received) break; 385 ag_send_ok = 0; 386 387 ag_num_button_press_received = 0; 388 hsp_state = HSP_W2_CONNECT_SCO; 389 390 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 391 if (err) { 392 hsp_state = HSP_W4_RING_ANSWER; 393 ag_num_button_press_received = 1; 394 } 395 break; 396 case HSP_W2_CONNECT_SCO: 397 if (!hci_can_send_command_packet_now()) break; 398 hsp_state = HSP_W4_SCO_CONNECTED; 399 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 400 break; 401 402 case HSP_W2_DISCONNECT_SCO: 403 ag_num_button_press_received = 0; 404 405 hsp_state = HSP_W4_SCO_DISCONNECTED; 406 gap_disconnect(sco_handle); 407 break; 408 409 case HSP_W2_DISCONNECT_RFCOMM: 410 hsp_state = HSP_W4_RFCOMM_DISCONNECTED; 411 rfcomm_disconnect(rfcomm_cid); 412 break; 413 case HSP_ACTIVE: 414 415 if (ag_microphone_gain >= 0){ 416 int gain = ag_microphone_gain; 417 ag_microphone_gain = -1; 418 char buffer[10]; 419 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 420 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 421 if (err) { 422 ag_microphone_gain = gain; 423 } 424 break; 425 } 426 427 if (ag_speaker_gain >= 0){ 428 int gain = ag_speaker_gain; 429 ag_speaker_gain = -1; 430 char buffer[10]; 431 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 432 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 433 if (err) { 434 ag_speaker_gain = gain; 435 } 436 break; 437 } 438 break; 439 default: 440 break; 441 } 442 } 443 444 445 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 446 if (packet_type == RFCOMM_DATA_PACKET){ 447 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 448 size--; 449 packet++; 450 } 451 452 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 453 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 454 ag_num_button_press_received++; 455 ag_send_ok = 1; 456 if (hsp_state == HSP_ACTIVE && ag_num_button_press_received >=2){ 457 ag_num_button_press_received = 0; 458 hsp_state = HSP_W2_DISCONNECT_SCO; 459 } 460 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 461 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 462 ag_send_ok = 1; 463 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 464 465 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 466 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 467 ag_send_ok = 1; 468 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 469 470 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 471 ag_send_error = 1; 472 if (!hsp_ag_callback) return; 473 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 474 uint8_t * event = packet - 4; 475 event[0] = HCI_EVENT_HSP_META; 476 event[1] = size + 2; 477 event[2] = HSP_SUBEVENT_HS_COMMAND; 478 event[3] = size; 479 (*hsp_ag_callback)(event, size+4); 480 } 481 482 hsp_run(); 483 return; 484 } 485 486 if (packet_type != HCI_EVENT_PACKET) return; 487 uint8_t event = hci_event_packet_get_type(packet); 488 bd_addr_t event_addr; 489 uint16_t handle; 490 491 switch (event) { 492 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 493 int index = 2; 494 uint8_t status = packet[index++]; 495 sco_handle = little_endian_read_16(packet, index); 496 index+=2; 497 bd_addr_t address; 498 memcpy(address, &packet[index], 6); 499 index+=6; 500 uint8_t link_type = packet[index++]; 501 uint8_t transmission_interval = packet[index++]; // measured in slots 502 uint8_t retransmission_interval = packet[index++];// measured in slots 503 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 504 index+=2; 505 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 506 index+=2; 507 uint8_t air_mode = packet[index]; 508 509 if (status != 0){ 510 log_error("(e)SCO Connection failed, status %u", status); 511 emit_event_audio_connected(status, sco_handle); 512 break; 513 } 514 switch (link_type){ 515 case 0x00: 516 log_info("SCO Connection established."); 517 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 518 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 519 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 520 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 521 break; 522 case 0x02: 523 log_info("eSCO Connection established."); 524 break; 525 default: 526 log_error("(e)SCO reserved link_type 0x%2x", link_type); 527 break; 528 } 529 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 530 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 531 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 532 533 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 534 hsp_state = HSP_W2_DISCONNECT_SCO; 535 break; 536 } 537 538 hsp_state = HSP_ACTIVE; 539 emit_event_audio_connected(status, sco_handle); 540 break; 541 } 542 543 case RFCOMM_EVENT_INCOMING_CONNECTION: 544 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 545 if (hsp_state != HSP_IDLE) return; 546 547 reverse_bd_addr(&packet[2], event_addr); 548 rfcomm_cid = little_endian_read_16(packet, 9); 549 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 550 rfcomm_accept_connection(rfcomm_cid); 551 552 hsp_state = HSP_W4_RFCOMM_CONNECTED; 553 break; 554 555 case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE: 556 log_info("RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE packet_handler type %u, packet[0] %x", packet_type, packet[0]); 557 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 558 if (packet[2]) { 559 log_info("RFCOMM channel open failed, status %u§", packet[2]); 560 hsp_ag_reset_state(); 561 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, packet[2]); 562 } else { 563 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 564 rfcomm_handle = little_endian_read_16(packet, 9); 565 rfcomm_cid = little_endian_read_16(packet, 12); 566 mtu = little_endian_read_16(packet, 14); 567 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 568 569 switch (hsp_state){ 570 case HSP_W4_RFCOMM_CONNECTED: 571 ag_num_button_press_received = 0; 572 hsp_state = HSP_W2_CONNECT_SCO; 573 break; 574 case HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN: 575 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 576 break; 577 default: 578 log_error("no valid state"); 579 break; 580 } 581 } 582 break; 583 584 case HCI_EVENT_DISCONNECTION_COMPLETE: 585 handle = little_endian_read_16(packet,3); 586 if (handle == sco_handle){ 587 log_info("SCO disconnected, w2 disconnect RFCOMM"); 588 sco_handle = 0; 589 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 590 break; 591 } 592 break; 593 594 case RFCOMM_EVENT_CHANNEL_CLOSED: 595 log_info("RFCOMM channel closed"); 596 hsp_ag_reset_state(); 597 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 598 break; 599 default: 600 break; 601 } 602 hsp_run(); 603 } 604 605 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 606 switch (packet[0]){ 607 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 608 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 609 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 610 break; 611 case SDP_EVENT_QUERY_COMPLETE: 612 if (channel_nr > 0){ 613 hsp_state = HSP_W4_RFCOMM_CONNECTED; 614 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 615 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 616 break; 617 } 618 hsp_ag_reset_state(); 619 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 620 if (sdp_event_query_complete_get_status(packet)){ 621 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 622 } else { 623 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 624 } 625 break; 626 default: 627 break; 628 } 629 } 630 631 632