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 // Minimal setup for HSP Audio Gateway (!! UNDER DEVELOPMENT !!) 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.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 RFCOMM_SERVER_CHANNEL 1 64 65 #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" 66 #define HSP_HS_AT_CKPD "AT+CKPD\r\n" 67 #define HSP_AG_OK "\r\nOK\r\n" 68 #define HSP_AG_ERROR "\r\nERROR\r\n" 69 #define HSP_AG_RING "\r\nRING\r\n" 70 #define HSP_MICROPHONE_GAIN "+VGM" 71 #define HSP_SPEAKER_GAIN "+VGS" 72 73 #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" 74 #define HSP_HS_SPEAKER_GAIN "AT+VGS=" 75 76 static const char default_hsp_ag_service_name[] = "Audio Gateway"; 77 78 static bd_addr_t remote; 79 static uint8_t channel_nr = 0; 80 81 static uint16_t mtu; 82 static uint16_t rfcomm_cid = 0; 83 static uint16_t sco_handle = 0; 84 static uint16_t rfcomm_handle = 0; 85 static btstack_timer_source_t hs_timeout; 86 87 // static uint8_t connection_state = 0; 88 89 static int ag_microphone_gain = -1; 90 static int ag_speaker_gain = -1; 91 static uint8_t ag_ring = 0; 92 static uint8_t ag_send_ok = 0; 93 static uint8_t ag_send_error = 0; 94 static uint8_t ag_num_button_press_received = 0; 95 static uint8_t ag_support_custom_commands = 0; 96 97 static btstack_packet_callback_registration_t hci_event_callback_registration; 98 99 typedef enum { 100 HSP_IDLE, 101 HSP_SDP_QUERY_RFCOMM_CHANNEL, 102 HSP_W4_SDP_EVENT_QUERY_COMPLETE, 103 HSP_W4_RFCOMM_CONNECTED, 104 HSP_W4_RING_ANSWER, 105 HSP_W4_USER_ACTION, 106 HSP_W2_CONNECT_SCO, 107 HSP_W4_SCO_CONNECTED, 108 HSP_ACTIVE, 109 HSP_W2_DISCONNECT_SCO, 110 HSP_W4_SCO_DISCONNECTED, 111 HSP_W2_DISCONNECT_RFCOMM, 112 HSP_W4_RFCOMM_DISCONNECTED, 113 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 114 } hsp_state_t; 115 116 static hsp_state_t hsp_state = HSP_IDLE; 117 118 119 static hsp_ag_callback_t hsp_ag_callback; 120 121 static void hsp_run(); 122 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 123 static void handle_query_rfcomm_event(uint8_t packet_type, uint8_t *packet, uint16_t size, void * context); 124 125 static void dummy_notify(uint8_t * event, uint16_t size){} 126 127 void hsp_ag_register_packet_handler(hsp_ag_callback_t callback){ 128 if (callback == NULL){ 129 callback = &dummy_notify; 130 } 131 hsp_ag_callback = callback; 132 } 133 134 static void emit_event(uint8_t event_subtype, uint8_t value){ 135 if (!hsp_ag_callback) return; 136 uint8_t event[4]; 137 event[0] = HCI_EVENT_HSP_META; 138 event[1] = sizeof(event) - 2; 139 event[2] = event_subtype; 140 event[3] = value; // status 0 == OK 141 (*hsp_ag_callback)(event, sizeof(event)); 142 } 143 144 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 145 if (!hsp_hs_callback) return; 146 uint8_t event[6]; 147 event[0] = HCI_EVENT_HSP_META; 148 event[1] = sizeof(event) - 2; 149 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 150 event[3] = status; 151 little_endian_store_16(event, 4, handle); 152 (*hsp_hs_callback)(event, sizeof(event)); 153 } 154 155 void hsp_ag_create_service(uint8_t * service, int rfcomm_channel_nr, const char * name){ 156 uint8_t* attribute; 157 de_create_sequence(service); 158 159 // 0x0000 "Service Record Handle" 160 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle); 161 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 162 163 // 0x0001 "Service Class ID List" 164 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList); 165 attribute = de_push_sequence(service); 166 { 167 // "UUID for PAN Service" 168 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_Headset_AG); 169 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_GenericAudio); 170 } 171 de_pop_sequence(service, attribute); 172 173 // 0x0004 "Protocol Descriptor List" 174 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList); 175 attribute = de_push_sequence(service); 176 { 177 uint8_t* l2cpProtocol = de_push_sequence(attribute); 178 { 179 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol); 180 } 181 de_pop_sequence(attribute, l2cpProtocol); 182 183 uint8_t* rfcomm = de_push_sequence(attribute); 184 { 185 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, SDP_RFCOMMProtocol); // rfcomm_service 186 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 187 } 188 de_pop_sequence(attribute, rfcomm); 189 } 190 de_pop_sequence(service, attribute); 191 192 // 0x0005 "Public Browse Group" 193 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group 194 attribute = de_push_sequence(service); 195 { 196 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup); 197 } 198 de_pop_sequence(service, attribute); 199 200 // 0x0009 "Bluetooth Profile Descriptor List" 201 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList); 202 attribute = de_push_sequence(service); 203 { 204 uint8_t *sppProfile = de_push_sequence(attribute); 205 { 206 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, SDP_HSP); 207 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 208 } 209 de_pop_sequence(attribute, sppProfile); 210 } 211 de_pop_sequence(service, attribute); 212 213 // 0x0100 "Service Name" 214 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 215 if (name){ 216 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 217 } else { 218 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 219 } 220 } 221 222 static int hsp_ag_send_str_over_rfcomm(uint16_t cid, char * command){ 223 if (!rfcomm_can_send_packet_now(cid)) return 1; 224 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 225 if (err){ 226 printf("rfcomm_send -> error 0X%02x", err); 227 return err; 228 } 229 printf("Send string: \"%s\"\n", command); 230 return err; 231 } 232 233 void hsp_ag_support_custom_commands(int enable){ 234 ag_support_custom_commands = enable; 235 } 236 237 int hsp_ag_send_result(char * result){ 238 if (!ag_support_custom_commands) return 1; 239 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 240 } 241 242 static void hsp_ag_reset_state(void){ 243 hsp_state = HSP_IDLE; 244 245 rfcomm_cid = 0; 246 rfcomm_handle = 0; 247 sco_handle = 0; 248 249 ag_send_ok = 0; 250 ag_send_error = 0; 251 ag_ring = 0; 252 253 ag_num_button_press_received = 0; 254 ag_support_custom_commands = 0; 255 256 ag_microphone_gain = -1; 257 ag_speaker_gain = -1; 258 } 259 260 static void hci_event_handler(uint8_t packet_type, uint8_t * packet, uint16_t size){ 261 packet_handler(packet, size); 262 } 263 264 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 265 // register for HCI events 266 hci_event_callback_registration.callback = &hci_event_handler; 267 hci_add_event_handler(&hci_event_callback_registration); 268 269 // init L2CAP 270 l2cap_init(); 271 272 rfcomm_init(); 273 rfcomm_register_packet_handler(packet_handler); 274 rfcomm_register_service(rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 275 276 sdp_query_rfcomm_register_callback(handle_query_rfcomm_event, NULL); 277 278 hsp_ag_reset_state(); 279 } 280 281 void hsp_ag_connect(bd_addr_t bd_addr){ 282 if (hsp_state != HSP_IDLE) return; 283 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 284 memcpy(remote, bd_addr, 6); 285 hsp_run(); 286 } 287 288 void hsp_ag_disconnect(void){ 289 switch (hsp_state){ 290 case HSP_ACTIVE: 291 hsp_state = HSP_W2_DISCONNECT_SCO; 292 break; 293 case HSP_W2_CONNECT_SCO: 294 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 295 break; 296 297 case HSP_W4_RFCOMM_CONNECTED: 298 case HSP_W4_SCO_CONNECTED: 299 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 300 break; 301 default: 302 return; 303 } 304 hsp_run(); 305 } 306 307 void hsp_ag_set_microphone_gain(uint8_t gain){ 308 if (gain < 0 || gain >15) { 309 printf("Gain must be in interval [0..15], it is given %d\n", gain); 310 return; 311 } 312 ag_microphone_gain = gain; 313 hsp_run(); 314 } 315 316 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 317 void hsp_ag_set_speaker_gain(uint8_t gain){ 318 if (gain < 0 || gain >15) { 319 printf("Gain must be in interval [0..15], it is given %d\n", gain); 320 return; 321 } 322 ag_speaker_gain = gain; 323 hsp_run(); 324 } 325 326 static void hsp_timeout_handler(btstack_timer_source_t * timer){ 327 ag_ring = 1; 328 } 329 330 static void hsp_timeout_start(void){ 331 btstack_run_loop_remove_timer(&hs_timeout); 332 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_timeout_handler); 333 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 334 btstack_run_loop_add_timer(&hs_timeout); 335 } 336 337 static void hsp_timeout_stop(void){ 338 btstack_run_loop_remove_timer(&hs_timeout); 339 } 340 341 void hsp_ag_start_ringing(void){ 342 if (hsp_state != HSP_W2_CONNECT_SCO) return; 343 ag_ring = 1; 344 hsp_state = HSP_W4_RING_ANSWER; 345 hsp_timeout_start(); 346 } 347 348 void hsp_ag_stop_ringing(void){ 349 ag_ring = 0; 350 ag_num_button_press_received = 0; 351 hsp_state = HSP_W2_CONNECT_SCO; 352 hsp_timeout_stop(); 353 } 354 355 static void hsp_run(void){ 356 int err; 357 358 if (ag_send_ok){ 359 ag_send_ok = 0; 360 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 361 if (err){ 362 ag_send_ok = 1; 363 } 364 return; 365 } 366 367 if (ag_send_error){ 368 ag_send_error = 0; 369 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 370 if (err) { 371 ag_send_error = 1; 372 } 373 return; 374 } 375 376 switch (hsp_state){ 377 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 378 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 379 printf("Start SDP query %s, 0x%02x\n", bd_addr_to_str(remote), SDP_HSP); 380 sdp_query_rfcomm_channel_and_name_for_uuid(remote, SDP_HSP); 381 break; 382 383 case HSP_W4_RING_ANSWER: 384 if (ag_ring){ 385 ag_ring = 0; 386 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 387 if (err) { 388 ag_ring = 1; 389 } 390 break; 391 } 392 393 if (!ag_num_button_press_received) break; 394 ag_send_ok = 0; 395 396 ag_num_button_press_received = 0; 397 hsp_state = HSP_W2_CONNECT_SCO; 398 399 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 400 if (err) { 401 hsp_state = HSP_W4_RING_ANSWER; 402 ag_num_button_press_received = 1; 403 } 404 break; 405 case HSP_W2_CONNECT_SCO: 406 if (!hci_can_send_command_packet_now()) break; 407 hsp_state = HSP_W4_SCO_CONNECTED; 408 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 409 break; 410 411 case HSP_W2_DISCONNECT_SCO: 412 ag_num_button_press_received = 0; 413 414 hsp_state = HSP_W4_SCO_DISCONNECTED; 415 gap_disconnect(sco_handle); 416 break; 417 418 case HSP_W2_DISCONNECT_RFCOMM: 419 hsp_state = HSP_W4_RFCOMM_DISCONNECTED; 420 rfcomm_disconnect(rfcomm_cid); 421 break; 422 case HSP_ACTIVE: 423 424 if (ag_microphone_gain >= 0){ 425 int gain = ag_microphone_gain; 426 ag_microphone_gain = -1; 427 char buffer[10]; 428 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 429 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 430 if (err) { 431 ag_microphone_gain = gain; 432 } 433 break; 434 } 435 436 if (ag_speaker_gain >= 0){ 437 int gain = ag_speaker_gain; 438 ag_speaker_gain = -1; 439 char buffer[10]; 440 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 441 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 442 if (err) { 443 ag_speaker_gain = gain; 444 } 445 break; 446 } 447 break; 448 default: 449 break; 450 } 451 } 452 453 454 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 455 // printf("packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 456 if (packet_type == RFCOMM_DATA_PACKET){ 457 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 458 size--; 459 packet++; 460 } 461 462 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 463 printf("Received button press %s\n", HSP_HS_BUTTON_PRESS); 464 ag_num_button_press_received++; 465 ag_send_ok = 1; 466 if (hsp_state == HSP_ACTIVE && ag_num_button_press_received >=2){ 467 ag_num_button_press_received = 0; 468 hsp_state = HSP_W2_DISCONNECT_SCO; 469 } 470 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 471 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 472 ag_send_ok = 1; 473 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 474 475 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 476 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 477 ag_send_ok = 1; 478 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 479 480 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 481 ag_send_error = 1; 482 if (!hsp_ag_callback) return; 483 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 484 uint8_t * event = packet - 3; 485 event[0] = HCI_EVENT_HSP_META; 486 event[1] = size + 1; 487 event[2] = HSP_SUBEVENT_HS_COMMAND; 488 (*hsp_ag_callback)(event, size+3); 489 } 490 491 hsp_run(); 492 return; 493 } 494 495 if (packet_type != HCI_EVENT_PACKET) return; 496 uint8_t event = packet[0]; 497 bd_addr_t event_addr; 498 uint16_t handle; 499 500 switch (event) { 501 case BTSTACK_EVENT_STATE: 502 // BTstack activated, get started 503 if (packet[2] == HCI_STATE_WORKING){ 504 printf("BTstack activated, get started .\n"); 505 } 506 break; 507 508 case HCI_EVENT_PIN_CODE_REQUEST: 509 // inform about pin code request 510 printf("Pin code request - using '0000'\n\r"); 511 bt_flip_addr(event_addr, &packet[2]); 512 hci_send_cmd(&hci_pin_code_request_reply, &event_addr, 4, "0000"); 513 break; 514 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 515 int index = 2; 516 uint8_t status = packet[index++]; 517 sco_handle = little_endian_read_16(packet, index); 518 index+=2; 519 bd_addr_t address; 520 memcpy(address, &packet[index], 6); 521 index+=6; 522 uint8_t link_type = packet[index++]; 523 uint8_t transmission_interval = packet[index++]; // measured in slots 524 uint8_t retransmission_interval = packet[index++];// measured in slots 525 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 526 index+=2; 527 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 528 index+=2; 529 uint8_t air_mode = packet[index]; 530 531 if (status != 0){ 532 log_error("(e)SCO Connection failed, status %u", status); 533 emit_event_audio_connected(status, sco_handle); 534 break; 535 } 536 switch (link_type){ 537 case 0x00: 538 printf("SCO Connection established. \n"); 539 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 540 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 541 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 542 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 543 break; 544 case 0x02: 545 printf("eSCO Connection established. \n"); 546 break; 547 default: 548 log_error("(e)SCO reserved link_type 0x%2x", link_type); 549 break; 550 } 551 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 552 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 553 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 554 555 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 556 hsp_state = HSP_W2_DISCONNECT_SCO; 557 break; 558 } 559 560 hsp_state = HSP_ACTIVE; 561 emit_event_audio_connected(status, sco_handle); 562 break; 563 } 564 565 case RFCOMM_EVENT_INCOMING_CONNECTION: 566 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 567 if (hsp_state != HSP_IDLE) return; 568 569 bt_flip_addr(event_addr, &packet[2]); 570 rfcomm_cid = little_endian_read_16(packet, 9); 571 printf("RFCOMM channel %u requested for %s\n", packet[8], bd_addr_to_str(event_addr)); 572 rfcomm_accept_connection(rfcomm_cid); 573 574 hsp_state = HSP_W4_RFCOMM_CONNECTED; 575 576 break; 577 578 case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE: 579 printf("RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 580 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 581 if (packet[2]) { 582 printf("RFCOMM channel open failed, status %u\n", packet[2]); 583 hsp_ag_reset_state(); 584 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, packet[2]); 585 } else { 586 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 587 rfcomm_handle = little_endian_read_16(packet, 9); 588 rfcomm_cid = little_endian_read_16(packet, 12); 589 mtu = little_endian_read_16(packet, 14); 590 printf("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d\n", rfcomm_cid, mtu, hsp_state); 591 592 switch (hsp_state){ 593 case HSP_W4_RFCOMM_CONNECTED: 594 ag_num_button_press_received = 0; 595 hsp_state = HSP_W2_CONNECT_SCO; 596 break; 597 case HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN: 598 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 599 break; 600 default: 601 printf("no valid state\n"); 602 break; 603 } 604 } 605 break; 606 case DAEMON_EVENT_HCI_PACKET_SENT: 607 case RFCOMM_EVENT_CREDITS: 608 break; 609 610 case HCI_EVENT_DISCONNECTION_COMPLETE: 611 if (hsp_state != HSP_W4_SCO_DISCONNECTED){ 612 log_info("received gap disconnect in wrong hsp state"); 613 } 614 handle = little_endian_read_16(packet,3); 615 if (handle == sco_handle){ 616 printf("SCO disconnected, w2 disconnect RFCOMM\n"); 617 sco_handle = 0; 618 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 619 break; 620 } 621 break; 622 case RFCOMM_EVENT_CHANNEL_CLOSED: 623 if (hsp_state != HSP_W4_RFCOMM_DISCONNECTED){ 624 log_info("received RFCOMM disconnect in wrong hsp state"); 625 } 626 printf("RFCOMM channel closed\n"); 627 hsp_ag_reset_state(); 628 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 629 break; 630 default: 631 break; 632 } 633 hsp_run(); 634 } 635 636 static void handle_query_rfcomm_event(uint8_t packet_type, uint8_t *packet, uint16_t size, void * context){ 637 switch (event->type){ 638 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 639 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 640 printf("** Service name: '%s', RFCOMM port %u\n", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 641 break; 642 case SDP_EVENT_QUERY_COMPLETE: 643 if (channel_nr > 0){ 644 hsp_state = HSP_W4_RFCOMM_CONNECTED; 645 printf("RFCOMM create channel. state %d\n", HSP_W4_RFCOMM_CONNECTED); 646 rfcomm_create_channel(remote, channel_nr, NULL); 647 break; 648 } 649 hsp_ag_reset_state(); 650 printf("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 651 if (sdp_event_query_complete_get_status(packet)){ 652 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 653 } else { 654 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 655 } 656 break; 657 default: 658 break; 659 } 660 } 661 662 663