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 Headset 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/core.h" 56 #include "classic/sdp_server.h" 57 #include "classic/sdp_client_rfcomm.h" 58 #include "classic/sdp_util.h" 59 #include "hci.h" 60 #include "hci_cmd.h" 61 #include "hci_dump.h" 62 #include "hsp_hs.h" 63 #include "l2cap.h" 64 65 #define HSP_AG_OK "OK" 66 #define HSP_AG_ERROR "ERROR" 67 #define HSP_AG_RING "RING" 68 #define HSP_MICROPHONE_GAIN "+VGM=" 69 #define HSP_SPEAKER_GAIN "+VGS=" 70 71 #define HSP_HS_AT_CKPD "AT+CKPD=200\r\n" 72 #define HSP_HS_MICROPHONE_GAIN "AT+VGM" 73 #define HSP_HS_SPEAKER_GAIN "AT+VGS" 74 75 static const char default_hsp_hs_service_name[] = "Headset"; 76 77 static bd_addr_t remote = {0x04, 0x0C, 0xCE, 0xE4, 0x85, 0xD3}; 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 85 // static uint8_t connection_state = 0; 86 87 static int hs_microphone_gain = -1; 88 static int hs_speaker_gain = -1; 89 90 static uint8_t hs_send_button_press = 0; 91 static uint8_t wait_ok = 0; 92 93 static uint8_t hs_support_custom_indications = 0; 94 static btstack_packet_callback_registration_t hci_event_callback_registration; 95 static uint8_t hsp_disconnect_rfcomm = 0; 96 static uint8_t hsp_establish_audio_connection = 0; 97 static uint8_t hsp_release_audio_connection = 0; 98 99 typedef enum { 100 HSP_IDLE, 101 HSP_SDP_QUERY_RFCOMM_CHANNEL, 102 HSP_W4_SDP_QUERY_COMPLETE, 103 HSP_W4_RFCOMM_CONNECTED, 104 105 HSP_RFCOMM_CONNECTION_ESTABLISHED, 106 107 HSP_W2_CONNECT_SCO, 108 HSP_W4_SCO_CONNECTED, 109 110 HSP_AUDIO_CONNECTION_ESTABLISHED, 111 112 HSP_W2_DISCONNECT_SCO, 113 HSP_W4_SCO_DISCONNECTED, 114 115 HSP_W2_DISCONNECT_RFCOMM, 116 HSP_W4_RFCOMM_DISCONNECTED, 117 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 118 } hsp_state_t; 119 120 static hsp_state_t hsp_state = HSP_IDLE; 121 122 static void hsp_run(void); 123 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 124 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 125 126 static hsp_hs_callback_t hsp_hs_callback; 127 static void dummy_notify(uint8_t * event, uint16_t size){} 128 129 void hsp_hs_register_packet_handler(hsp_hs_callback_t callback){ 130 if (callback == NULL){ 131 callback = &dummy_notify; 132 } 133 hsp_hs_callback = callback; 134 } 135 136 static void emit_event(uint8_t event_subtype, uint8_t value){ 137 if (!hsp_hs_callback) return; 138 uint8_t event[4]; 139 event[0] = HCI_EVENT_HSP_META; 140 event[1] = sizeof(event) - 2; 141 event[2] = event_subtype; 142 event[3] = value; // status 0 == OK 143 (*hsp_hs_callback)(event, sizeof(event)); 144 } 145 146 static void emit_ring_event(void){ 147 if (!hsp_hs_callback) return; 148 uint8_t event[3]; 149 event[0] = HCI_EVENT_HSP_META; 150 event[1] = sizeof(event) - 2; 151 event[2] = HSP_SUBEVENT_RING; 152 (*hsp_hs_callback)(event, sizeof(event)); 153 } 154 155 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 156 if (!hsp_hs_callback) return; 157 uint8_t event[6]; 158 event[0] = HCI_EVENT_HSP_META; 159 event[1] = sizeof(event) - 2; 160 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 161 event[3] = status; 162 little_endian_store_16(event, 4, handle); 163 (*hsp_hs_callback)(event, sizeof(event)); 164 } 165 166 // remote audio volume control 167 // AG +VGM=13 [0..15] ; HS AT+VGM=6 | AG OK 168 169 static int hsp_hs_send_str_over_rfcomm(uint16_t cid, const char * command){ 170 if (!rfcomm_can_send_packet_now(rfcomm_cid)) return 1; 171 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 172 if (err){ 173 log_info("rfcomm_send_internal -> error 0X%02x", err); 174 } 175 return err; 176 } 177 178 void hsp_hs_enable_custom_indications(int enable){ 179 hs_support_custom_indications = enable; 180 } 181 182 int hsp_hs_send_result(const char * result){ 183 if (!hs_support_custom_indications) return 1; 184 return hsp_hs_send_str_over_rfcomm(rfcomm_cid, result); 185 } 186 187 188 void hsp_hs_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name, uint8_t have_remote_audio_control){ 189 uint8_t* attribute; 190 de_create_sequence(service); 191 192 // 0x0000 "Service Record Handle" 193 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle); 194 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 195 196 // 0x0001 "Service Class ID List" 197 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList); 198 attribute = de_push_sequence(service); 199 { 200 // see Bluetooth Erratum #3507 201 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_HSP); // 0x1108 202 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_Headset_HS); // 0x1131 203 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_GenericAudio); // 0x1203 204 } 205 de_pop_sequence(service, attribute); 206 207 // 0x0004 "Protocol Descriptor List" 208 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList); 209 attribute = de_push_sequence(service); 210 { 211 uint8_t* l2cpProtocol = de_push_sequence(attribute); 212 { 213 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol); 214 } 215 de_pop_sequence(attribute, l2cpProtocol); 216 217 uint8_t* rfcomm = de_push_sequence(attribute); 218 { 219 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, SDP_RFCOMMProtocol); // rfcomm_service 220 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 221 } 222 de_pop_sequence(attribute, rfcomm); 223 } 224 de_pop_sequence(service, attribute); 225 226 // 0x0005 "Public Browse Group" 227 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group 228 attribute = de_push_sequence(service); 229 { 230 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup); 231 } 232 de_pop_sequence(service, attribute); 233 234 // 0x0009 "Bluetooth Profile Descriptor List" 235 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList); 236 attribute = de_push_sequence(service); 237 { 238 uint8_t *hsp_profile = de_push_sequence(attribute); 239 { 240 de_add_number(hsp_profile, DE_UUID, DE_SIZE_16, SDP_HSP); 241 de_add_number(hsp_profile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 242 } 243 de_pop_sequence(attribute, hsp_profile); 244 } 245 de_pop_sequence(service, attribute); 246 247 // 0x0100 "Service Name" 248 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 249 if (name){ 250 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 251 } else { 252 de_add_data(service, DE_STRING, strlen(default_hsp_hs_service_name), (uint8_t *) default_hsp_hs_service_name); 253 } 254 255 // Remote audio volume control 256 de_add_number(service, DE_UINT, DE_SIZE_16, 0x030C); 257 de_add_number(service, DE_BOOL, DE_SIZE_8, have_remote_audio_control); 258 } 259 260 static void hsp_hs_reset_state(void){ 261 hsp_state = HSP_IDLE; 262 hs_microphone_gain = -1; 263 hs_speaker_gain = -1; 264 265 hs_send_button_press = 0; 266 wait_ok = 0; 267 hs_support_custom_indications = 0; 268 269 hsp_disconnect_rfcomm = 0; 270 hsp_establish_audio_connection = 0; 271 hsp_release_audio_connection = 0; 272 } 273 274 void hsp_hs_init(uint8_t rfcomm_channel_nr){ 275 // register for HCI events 276 hci_event_callback_registration.callback = &packet_handler; 277 hci_add_event_handler(&hci_event_callback_registration); 278 279 // init L2CAP 280 l2cap_init(); 281 282 rfcomm_init(); 283 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 284 285 hsp_hs_reset_state(); 286 } 287 288 289 void hsp_hs_connect(bd_addr_t bd_addr){ 290 if (hsp_state != HSP_IDLE) return; 291 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 292 memcpy(remote, bd_addr, 6); 293 hsp_run(); 294 } 295 296 void hsp_hs_disconnect(void){ 297 hsp_hs_release_audio_connection(); 298 299 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 300 hsp_state = HSP_IDLE; 301 return; 302 } 303 304 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 305 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 306 return; 307 } 308 309 if (hsp_state < HSP_W4_SCO_CONNECTED){ 310 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 311 return; 312 } 313 314 hsp_disconnect_rfcomm = 1; 315 hsp_run(); 316 } 317 318 319 void hsp_hs_establish_audio_connection(void){ 320 switch (hsp_state){ 321 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 322 hsp_establish_audio_connection = 1; 323 hsp_state = HSP_W4_SCO_CONNECTED; 324 break; 325 case HSP_W4_RFCOMM_CONNECTED: 326 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 327 break; 328 default: 329 break; 330 } 331 hsp_run(); 332 } 333 334 void hsp_hs_release_audio_connection(void){ 335 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 336 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 337 hsp_release_audio_connection = 1; 338 hsp_run(); 339 } 340 341 void hsp_hs_set_microphone_gain(uint8_t gain){ 342 if (gain < 0 || gain >15) { 343 log_info("Gain must be in interval [0..15], it is given %d", gain); 344 return; 345 } 346 hs_microphone_gain = gain; 347 hsp_run(); 348 } 349 350 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 351 void hsp_hs_set_speaker_gain(uint8_t gain){ 352 if (gain < 0 || gain >15) { 353 log_info("Gain must be in interval [0..15], it is given %d", gain); 354 return; 355 } 356 hs_speaker_gain = gain; 357 hsp_run(); 358 } 359 360 361 static void hsp_run(void){ 362 if (!rfcomm_can_send_packet_now(rfcomm_cid)) return; 363 if (wait_ok) return; 364 365 if (hsp_release_audio_connection){ 366 hsp_release_audio_connection = 0; 367 wait_ok = 1; 368 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 369 return; 370 } 371 372 if (hsp_disconnect_rfcomm){ 373 hsp_disconnect_rfcomm = 0; 374 hsp_establish_audio_connection = 0; 375 rfcomm_disconnect(rfcomm_cid); 376 return; 377 } 378 379 if (hsp_establish_audio_connection){ 380 hsp_establish_audio_connection = 0; 381 wait_ok = 1; 382 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 383 return; 384 } 385 386 if (hs_send_button_press){ 387 hs_send_button_press = 0; 388 wait_ok = 1; 389 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 390 return; 391 } 392 393 switch (hsp_state){ 394 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 395 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 396 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, SDP_Headset_AG); 397 break; 398 399 case HSP_AUDIO_CONNECTION_ESTABLISHED: 400 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 401 402 if (hs_microphone_gain >= 0){ 403 char buffer[20]; 404 sprintf(buffer, "%s=%d\r\n", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain); 405 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 406 hs_microphone_gain = -1; 407 break; 408 } 409 410 if (hs_speaker_gain >= 0){ 411 char buffer[20]; 412 sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain); 413 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 414 hs_speaker_gain = -1; 415 break; 416 } 417 break; 418 case HSP_W4_RFCOMM_DISCONNECTED: 419 rfcomm_disconnect(rfcomm_cid); 420 break; 421 default: 422 break; 423 } 424 } 425 426 427 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 428 // printf("packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 429 if (packet_type == RFCOMM_DATA_PACKET){ 430 // skip over leading newline 431 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 432 size--; 433 packet++; 434 } 435 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 436 emit_ring_event(); 437 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 438 wait_ok = 0; 439 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 440 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 441 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 442 443 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 444 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 445 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 446 } else { 447 if (!hsp_hs_callback) return; 448 // strip trailing newline 449 while (size > 0 && (packet[size-1] == '\n' || packet[size-1] == '\r')){ 450 size--; 451 } 452 // add trailing \0 453 packet[size] = 0; 454 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 455 uint8_t * event = packet - 4; 456 event[0] = HCI_EVENT_HSP_META; 457 event[1] = size + 2; 458 event[2] = HSP_SUBEVENT_AG_INDICATION; 459 event[3] = size; 460 (*hsp_hs_callback)(event, size+4); 461 } 462 hsp_run(); 463 return; 464 } 465 466 if (packet_type != HCI_EVENT_PACKET) return; 467 uint8_t event = hci_event_packet_get_type(packet); 468 bd_addr_t event_addr; 469 uint16_t handle; 470 471 switch (event) { 472 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 473 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 474 int index = 2; 475 uint8_t status = packet[index++]; 476 sco_handle = little_endian_read_16(packet, index); 477 index+=2; 478 bd_addr_t address; 479 memcpy(address, &packet[index], 6); 480 index+=6; 481 uint8_t link_type = packet[index++]; 482 uint8_t transmission_interval = packet[index++]; // measured in slots 483 uint8_t retransmission_interval = packet[index++];// measured in slots 484 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 485 index+=2; 486 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 487 index+=2; 488 uint8_t air_mode = packet[index]; 489 490 if (status != 0){ 491 log_error("(e)SCO Connection failed, status %u", status); 492 emit_event_audio_connected(status, sco_handle); 493 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 494 break; 495 } 496 497 switch (link_type){ 498 case 0x00: 499 log_info("SCO Connection established."); 500 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 501 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 502 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 503 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 504 break; 505 case 0x02: 506 log_info("eSCO Connection established."); 507 break; 508 default: 509 log_error("(e)SCO reserved link_type 0x%2x", link_type); 510 break; 511 } 512 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 513 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 514 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 515 516 // forward event to app 517 hsp_hs_callback(packet, size); 518 519 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 520 emit_event_audio_connected(status, sco_handle); 521 break; 522 } 523 524 case RFCOMM_EVENT_INCOMING_CONNECTION: 525 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 526 if (hsp_state != HSP_IDLE) return; 527 528 reverse_bd_addr(&packet[2], event_addr); 529 rfcomm_cid = little_endian_read_16(packet, 9); 530 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 531 hsp_state = HSP_W4_RFCOMM_CONNECTED; 532 rfcomm_accept_connection(rfcomm_cid); 533 break; 534 535 case RFCOMM_EVENT_CHANNEL_OPENED: 536 // printf("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 537 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 538 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 539 if (packet[2]) { 540 log_info("RFCOMM channel open failed, status %u", packet[2]); 541 hsp_state = HSP_IDLE; 542 hsp_hs_reset_state(); 543 } else { 544 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 545 rfcomm_handle = little_endian_read_16(packet, 9); 546 rfcomm_cid = little_endian_read_16(packet, 12); 547 mtu = little_endian_read_16(packet, 14); 548 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", rfcomm_cid, mtu, rfcomm_handle); 549 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 550 } 551 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 552 break; 553 554 case RFCOMM_EVENT_CAN_SEND_NOW: 555 hsp_hs_callback(packet, size); 556 break; 557 558 case HCI_EVENT_DISCONNECTION_COMPLETE: 559 handle = little_endian_read_16(packet,3); 560 if (handle == sco_handle){ 561 sco_handle = 0; 562 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 563 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 564 break; 565 } 566 if (handle == rfcomm_handle) { 567 rfcomm_handle = 0; 568 hsp_state = HSP_IDLE; 569 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 570 hsp_hs_reset_state(); 571 } 572 break; 573 case RFCOMM_EVENT_CHANNEL_CLOSED: 574 hsp_hs_reset_state(); 575 hsp_hs_callback(packet, size); 576 break; 577 default: 578 break; 579 } 580 hsp_run(); 581 } 582 583 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 584 switch (hci_event_packet_get_type(packet)){ 585 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 586 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 587 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 588 break; 589 case SDP_EVENT_QUERY_COMPLETE: 590 if (channel_nr > 0){ 591 hsp_state = HSP_W4_RFCOMM_CONNECTED; 592 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr); 593 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 594 break; 595 } 596 hsp_hs_reset_state(); 597 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 598 break; 599 } 600 } 601 602 void hsp_hs_send_button_press(void){ 603 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED || hsp_state >= HSP_W4_RFCOMM_DISCONNECTED) return; 604 hs_send_button_press = 1; 605 hsp_run(); 606 } 607