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 btstack_packet_handler_t hsp_hs_callback; 127 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 128 UNUSED(packet_type); 129 UNUSED(channel); 130 UNUSED(event); 131 UNUSED(size); 132 } 133 134 void hsp_hs_register_packet_handler(btstack_packet_handler_t callback){ 135 if (callback == NULL){ 136 callback = &dummy_notify; 137 } 138 hsp_hs_callback = callback; 139 } 140 141 static void emit_event(uint8_t event_subtype, uint8_t value){ 142 if (!hsp_hs_callback) return; 143 uint8_t event[4]; 144 event[0] = HCI_EVENT_HSP_META; 145 event[1] = sizeof(event) - 2; 146 event[2] = event_subtype; 147 event[3] = value; // status 0 == OK 148 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 149 } 150 151 static void emit_ring_event(void){ 152 if (!hsp_hs_callback) return; 153 uint8_t event[3]; 154 event[0] = HCI_EVENT_HSP_META; 155 event[1] = sizeof(event) - 2; 156 event[2] = HSP_SUBEVENT_RING; 157 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 158 } 159 160 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 161 if (!hsp_hs_callback) return; 162 uint8_t event[6]; 163 event[0] = HCI_EVENT_HSP_META; 164 event[1] = sizeof(event) - 2; 165 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 166 event[3] = status; 167 little_endian_store_16(event, 4, handle); 168 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 169 } 170 171 // remote audio volume control 172 // AG +VGM=13 [0..15] ; HS AT+VGM=6 | AG OK 173 174 static int hsp_hs_send_str_over_rfcomm(uint16_t cid, const char * command){ 175 if (!rfcomm_can_send_packet_now(rfcomm_cid)) return 1; 176 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 177 if (err){ 178 log_info("rfcomm_send_internal -> error 0X%02x", err); 179 } 180 return err; 181 } 182 183 void hsp_hs_enable_custom_indications(int enable){ 184 hs_support_custom_indications = enable; 185 } 186 187 int hsp_hs_send_result(const char * result){ 188 if (!hs_support_custom_indications) return 1; 189 return hsp_hs_send_str_over_rfcomm(rfcomm_cid, result); 190 } 191 192 193 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){ 194 uint8_t* attribute; 195 de_create_sequence(service); 196 197 // 0x0000 "Service Record Handle" 198 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle); 199 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 200 201 // 0x0001 "Service Class ID List" 202 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList); 203 attribute = de_push_sequence(service); 204 { 205 // see Bluetooth Erratum #3507 206 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_HSP); // 0x1108 207 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_Headset_HS); // 0x1131 208 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_GenericAudio); // 0x1203 209 } 210 de_pop_sequence(service, attribute); 211 212 // 0x0004 "Protocol Descriptor List" 213 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList); 214 attribute = de_push_sequence(service); 215 { 216 uint8_t* l2cpProtocol = de_push_sequence(attribute); 217 { 218 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol); 219 } 220 de_pop_sequence(attribute, l2cpProtocol); 221 222 uint8_t* rfcomm = de_push_sequence(attribute); 223 { 224 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, SDP_RFCOMMProtocol); // rfcomm_service 225 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 226 } 227 de_pop_sequence(attribute, rfcomm); 228 } 229 de_pop_sequence(service, attribute); 230 231 // 0x0005 "Public Browse Group" 232 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group 233 attribute = de_push_sequence(service); 234 { 235 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup); 236 } 237 de_pop_sequence(service, attribute); 238 239 // 0x0009 "Bluetooth Profile Descriptor List" 240 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList); 241 attribute = de_push_sequence(service); 242 { 243 uint8_t *hsp_profile = de_push_sequence(attribute); 244 { 245 de_add_number(hsp_profile, DE_UUID, DE_SIZE_16, SDP_HSP); 246 de_add_number(hsp_profile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 247 } 248 de_pop_sequence(attribute, hsp_profile); 249 } 250 de_pop_sequence(service, attribute); 251 252 // 0x0100 "Service Name" 253 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 254 if (name){ 255 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 256 } else { 257 de_add_data(service, DE_STRING, strlen(default_hsp_hs_service_name), (uint8_t *) default_hsp_hs_service_name); 258 } 259 260 // Remote audio volume control 261 de_add_number(service, DE_UINT, DE_SIZE_16, 0x030C); 262 de_add_number(service, DE_BOOL, DE_SIZE_8, have_remote_audio_control); 263 } 264 265 static void hsp_hs_reset_state(void){ 266 hsp_state = HSP_IDLE; 267 hs_microphone_gain = -1; 268 hs_speaker_gain = -1; 269 270 hs_send_button_press = 0; 271 wait_ok = 0; 272 hs_support_custom_indications = 0; 273 274 hsp_disconnect_rfcomm = 0; 275 hsp_establish_audio_connection = 0; 276 hsp_release_audio_connection = 0; 277 } 278 279 void hsp_hs_init(uint8_t rfcomm_channel_nr){ 280 // register for HCI events 281 hci_event_callback_registration.callback = &packet_handler; 282 hci_add_event_handler(&hci_event_callback_registration); 283 284 rfcomm_init(); 285 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 286 287 hsp_hs_reset_state(); 288 } 289 290 291 void hsp_hs_connect(bd_addr_t bd_addr){ 292 if (hsp_state != HSP_IDLE) return; 293 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 294 memcpy(remote, bd_addr, 6); 295 hsp_run(); 296 } 297 298 void hsp_hs_disconnect(void){ 299 hsp_hs_release_audio_connection(); 300 301 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 302 hsp_state = HSP_IDLE; 303 return; 304 } 305 306 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 307 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 308 return; 309 } 310 311 if (hsp_state < HSP_W4_SCO_CONNECTED){ 312 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 313 return; 314 } 315 316 hsp_disconnect_rfcomm = 1; 317 hsp_run(); 318 } 319 320 321 void hsp_hs_establish_audio_connection(void){ 322 switch (hsp_state){ 323 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 324 hsp_establish_audio_connection = 1; 325 hsp_state = HSP_W4_SCO_CONNECTED; 326 break; 327 case HSP_W4_RFCOMM_CONNECTED: 328 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 329 break; 330 default: 331 break; 332 } 333 hsp_run(); 334 } 335 336 void hsp_hs_release_audio_connection(void){ 337 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 338 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 339 hsp_release_audio_connection = 1; 340 hsp_run(); 341 } 342 343 void hsp_hs_set_microphone_gain(uint8_t gain){ 344 if (gain < 0 || gain >15) { 345 log_info("Gain must be in interval [0..15], it is given %d", gain); 346 return; 347 } 348 hs_microphone_gain = gain; 349 hsp_run(); 350 } 351 352 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 353 void hsp_hs_set_speaker_gain(uint8_t gain){ 354 if (gain < 0 || gain >15) { 355 log_info("Gain must be in interval [0..15], it is given %d", gain); 356 return; 357 } 358 hs_speaker_gain = gain; 359 hsp_run(); 360 } 361 362 363 static void hsp_run(void){ 364 365 if (wait_ok) return; 366 367 if (hsp_release_audio_connection){ 368 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 369 rfcomm_request_can_send_now_event(rfcomm_cid); 370 return; 371 } 372 hsp_release_audio_connection = 0; 373 wait_ok = 1; 374 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 375 return; 376 } 377 378 if (hsp_disconnect_rfcomm){ 379 hsp_disconnect_rfcomm = 0; 380 hsp_establish_audio_connection = 0; 381 rfcomm_disconnect(rfcomm_cid); 382 return; 383 } 384 385 if (hsp_establish_audio_connection){ 386 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 387 rfcomm_request_can_send_now_event(rfcomm_cid); 388 return; 389 } 390 hsp_establish_audio_connection = 0; 391 wait_ok = 1; 392 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 393 return; 394 } 395 396 if (hs_send_button_press){ 397 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 398 rfcomm_request_can_send_now_event(rfcomm_cid); 399 return; 400 } 401 hs_send_button_press = 0; 402 wait_ok = 1; 403 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 404 return; 405 } 406 407 switch (hsp_state){ 408 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 409 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 410 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, SDP_Headset_AG); 411 break; 412 413 case HSP_AUDIO_CONNECTION_ESTABLISHED: 414 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 415 416 if (hs_microphone_gain >= 0){ 417 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 418 rfcomm_request_can_send_now_event(rfcomm_cid); 419 return; 420 } 421 char buffer[20]; 422 sprintf(buffer, "%s=%d\r\n", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain); 423 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 424 hs_microphone_gain = -1; 425 break; 426 } 427 428 if (hs_speaker_gain >= 0){ 429 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 430 rfcomm_request_can_send_now_event(rfcomm_cid); 431 return; 432 } 433 char buffer[20]; 434 sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain); 435 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 436 hs_speaker_gain = -1; 437 break; 438 } 439 break; 440 case HSP_W4_RFCOMM_DISCONNECTED: 441 rfcomm_disconnect(rfcomm_cid); 442 break; 443 default: 444 break; 445 } 446 } 447 448 449 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 450 UNUSED(channel); 451 452 // printf("packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 453 if (packet_type == RFCOMM_DATA_PACKET){ 454 // skip over leading newline 455 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 456 size--; 457 packet++; 458 } 459 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 460 emit_ring_event(); 461 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 462 wait_ok = 0; 463 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 464 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 465 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 466 467 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 468 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 469 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 470 } else { 471 if (!hsp_hs_callback) return; 472 // strip trailing newline 473 while (size > 0 && (packet[size-1] == '\n' || packet[size-1] == '\r')){ 474 size--; 475 } 476 // add trailing \0 477 packet[size] = 0; 478 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 479 uint8_t * event = packet - 4; 480 event[0] = HCI_EVENT_HSP_META; 481 event[1] = size + 2; 482 event[2] = HSP_SUBEVENT_AG_INDICATION; 483 event[3] = size; 484 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+4); 485 } 486 hsp_run(); 487 return; 488 } 489 490 if (packet_type != HCI_EVENT_PACKET) return; 491 uint8_t event = hci_event_packet_get_type(packet); 492 bd_addr_t event_addr; 493 uint16_t handle; 494 495 switch (event) { 496 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 497 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 498 int index = 2; 499 uint8_t status = packet[index++]; 500 sco_handle = little_endian_read_16(packet, index); 501 index+=2; 502 bd_addr_t address; 503 memcpy(address, &packet[index], 6); 504 index+=6; 505 uint8_t link_type = packet[index++]; 506 uint8_t transmission_interval = packet[index++]; // measured in slots 507 uint8_t retransmission_interval = packet[index++];// measured in slots 508 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 509 index+=2; 510 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 511 index+=2; 512 uint8_t air_mode = packet[index]; 513 514 if (status != 0){ 515 log_error("(e)SCO Connection failed, status %u", status); 516 emit_event_audio_connected(status, sco_handle); 517 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 518 break; 519 } 520 521 switch (link_type){ 522 case 0x00: 523 log_info("SCO Connection established."); 524 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 525 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 526 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 527 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 528 break; 529 case 0x02: 530 log_info("eSCO Connection established."); 531 break; 532 default: 533 log_error("(e)SCO reserved link_type 0x%2x", link_type); 534 break; 535 } 536 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 537 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 538 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 539 540 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 541 emit_event_audio_connected(status, sco_handle); 542 break; 543 } 544 545 case RFCOMM_EVENT_INCOMING_CONNECTION: 546 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 547 if (hsp_state != HSP_IDLE) return; 548 549 reverse_bd_addr(&packet[2], event_addr); 550 rfcomm_cid = little_endian_read_16(packet, 9); 551 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 552 hsp_state = HSP_W4_RFCOMM_CONNECTED; 553 rfcomm_accept_connection(rfcomm_cid); 554 break; 555 556 case RFCOMM_EVENT_CHANNEL_OPENED: 557 // printf("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 558 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 559 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 560 if (packet[2]) { 561 log_info("RFCOMM channel open failed, status %u", packet[2]); 562 hsp_state = HSP_IDLE; 563 hsp_hs_reset_state(); 564 } else { 565 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 566 rfcomm_handle = little_endian_read_16(packet, 9); 567 rfcomm_cid = little_endian_read_16(packet, 12); 568 mtu = little_endian_read_16(packet, 14); 569 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", rfcomm_cid, mtu, rfcomm_handle); 570 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 571 } 572 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 573 break; 574 575 case RFCOMM_EVENT_CAN_SEND_NOW: 576 hsp_run(); 577 break; 578 579 case HCI_EVENT_DISCONNECTION_COMPLETE: 580 handle = little_endian_read_16(packet,3); 581 if (handle == sco_handle){ 582 sco_handle = 0; 583 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 584 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 585 break; 586 } 587 if (handle == rfcomm_handle) { 588 rfcomm_handle = 0; 589 hsp_state = HSP_IDLE; 590 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 591 hsp_hs_reset_state(); 592 } 593 break; 594 595 case RFCOMM_EVENT_CHANNEL_CLOSED: 596 hsp_hs_reset_state(); 597 hsp_hs_callback(HCI_EVENT_PACKET, 0, packet, size); 598 break; 599 600 default: 601 break; 602 } 603 604 hsp_run(); 605 } 606 607 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 608 UNUSED(packet_type); 609 UNUSED(channel); 610 UNUSED(size); 611 612 switch (hci_event_packet_get_type(packet)){ 613 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 614 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 615 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 616 break; 617 case SDP_EVENT_QUERY_COMPLETE: 618 if (channel_nr > 0){ 619 hsp_state = HSP_W4_RFCOMM_CONNECTED; 620 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr); 621 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 622 break; 623 } 624 hsp_hs_reset_state(); 625 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 626 break; 627 } 628 } 629 630 void hsp_hs_send_button_press(void){ 631 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED || hsp_state >= HSP_W4_RFCOMM_DISCONNECTED) return; 632 hs_send_button_press = 1; 633 hsp_run(); 634 } 635