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 uint8_t hsp_disconnect_rfcomm = 0; 95 static uint8_t hsp_establish_audio_connection = 0; 96 static uint8_t hsp_release_audio_connection = 0; 97 98 static btstack_packet_callback_registration_t hci_event_callback_registration; 99 100 typedef enum { 101 HSP_IDLE, 102 HSP_SDP_QUERY_RFCOMM_CHANNEL, 103 HSP_W4_SDP_EVENT_QUERY_COMPLETE, 104 HSP_W4_RFCOMM_CONNECTED, 105 106 HSP_RFCOMM_CONNECTION_ESTABLISHED, 107 108 HSP_W4_RING_ANSWER, 109 HSP_W4_USER_ACTION, 110 HSP_W2_CONNECT_SCO, 111 HSP_W4_SCO_CONNECTED, 112 113 HSP_AUDIO_CONNECTION_ESTABLISHED, 114 115 HSP_W2_DISCONNECT_SCO, 116 HSP_W4_SCO_DISCONNECTED, 117 118 HSP_W2_DISCONNECT_RFCOMM, 119 HSP_W4_RFCOMM_DISCONNECTED, 120 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 121 } hsp_state_t; 122 123 static hsp_state_t hsp_state = HSP_IDLE; 124 125 126 static hsp_ag_callback_t hsp_ag_callback; 127 128 static void hsp_run(void); 129 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 130 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 131 132 static void dummy_notify(uint8_t * event, uint16_t size){} 133 134 void hsp_ag_register_packet_handler(hsp_ag_callback_t callback){ 135 if (callback == NULL){ 136 callback = &dummy_notify; 137 } 138 hsp_ag_callback = callback; 139 } 140 141 static void emit_event(uint8_t event_subtype, uint8_t value){ 142 if (!hsp_ag_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_ag_callback)(event, sizeof(event)); 149 } 150 151 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 152 if (!hsp_ag_callback) return; 153 uint8_t event[6]; 154 event[0] = HCI_EVENT_HSP_META; 155 event[1] = sizeof(event) - 2; 156 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 157 event[3] = status; 158 little_endian_store_16(event, 4, handle); 159 (*hsp_ag_callback)(event, sizeof(event)); 160 } 161 162 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 163 uint8_t* attribute; 164 de_create_sequence(service); 165 166 // 0x0000 "Service Record Handle" 167 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle); 168 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 169 170 // 0x0001 "Service Class ID List" 171 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList); 172 attribute = de_push_sequence(service); 173 { 174 // "UUID for PAN Service" 175 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_Headset_AG); 176 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_GenericAudio); 177 } 178 de_pop_sequence(service, attribute); 179 180 // 0x0004 "Protocol Descriptor List" 181 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList); 182 attribute = de_push_sequence(service); 183 { 184 uint8_t* l2cpProtocol = de_push_sequence(attribute); 185 { 186 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol); 187 } 188 de_pop_sequence(attribute, l2cpProtocol); 189 190 uint8_t* rfcomm = de_push_sequence(attribute); 191 { 192 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, SDP_RFCOMMProtocol); // rfcomm_service 193 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 194 } 195 de_pop_sequence(attribute, rfcomm); 196 } 197 de_pop_sequence(service, attribute); 198 199 // 0x0005 "Public Browse Group" 200 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group 201 attribute = de_push_sequence(service); 202 { 203 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup); 204 } 205 de_pop_sequence(service, attribute); 206 207 // 0x0009 "Bluetooth Profile Descriptor List" 208 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList); 209 attribute = de_push_sequence(service); 210 { 211 uint8_t *sppProfile = de_push_sequence(attribute); 212 { 213 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, SDP_HSP); 214 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 215 } 216 de_pop_sequence(attribute, sppProfile); 217 } 218 de_pop_sequence(service, attribute); 219 220 // 0x0100 "Service Name" 221 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 222 if (name){ 223 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 224 } else { 225 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 226 } 227 } 228 229 static int hsp_ag_send_str_over_rfcomm(uint16_t cid, char * command){ 230 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 231 if (err){ 232 log_error("rfcomm_send_internal -> error 0X%02x", err); 233 return err; 234 } 235 return err; 236 } 237 238 void hsp_ag_enable_custom_commands(int enable){ 239 ag_support_custom_commands = enable; 240 } 241 242 int hsp_ag_send_result(char * result){ 243 if (!ag_support_custom_commands) return 1; 244 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 245 } 246 247 static void hsp_ag_reset_state(void){ 248 hsp_state = HSP_IDLE; 249 250 rfcomm_cid = 0; 251 rfcomm_handle = 0; 252 sco_handle = 0; 253 254 ag_send_ok = 0; 255 ag_send_error = 0; 256 ag_ring = 0; 257 258 ag_num_button_press_received = 0; 259 ag_support_custom_commands = 0; 260 261 ag_microphone_gain = -1; 262 ag_speaker_gain = -1; 263 264 hsp_disconnect_rfcomm = 0; 265 hsp_establish_audio_connection = 0; 266 hsp_release_audio_connection = 0; 267 } 268 269 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 270 // register for HCI events 271 hci_event_callback_registration.callback = &packet_handler; 272 hci_add_event_handler(&hci_event_callback_registration); 273 274 // init L2CAP 275 l2cap_register_packet_handler(packet_handler); 276 277 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 278 279 hsp_ag_reset_state(); 280 } 281 282 void hsp_ag_connect(bd_addr_t bd_addr){ 283 if (hsp_state != HSP_IDLE) return; 284 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 285 memcpy(remote, bd_addr, 6); 286 hsp_run(); 287 } 288 289 void hsp_ag_disconnect(void){ 290 hsp_ag_release_audio_connection(); 291 printf(" rfcomm diconnect %d\n", hsp_state); 292 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 293 hsp_state = HSP_IDLE; 294 return; 295 } 296 297 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 298 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 299 return; 300 } 301 hsp_disconnect_rfcomm = 1; 302 hsp_run(); 303 } 304 305 void hsp_ag_establish_audio_connection(void){ 306 printf("hsp_ag_establish_audio_connection state %d\n", hsp_state); 307 308 switch (hsp_state){ 309 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 310 printf("set flag hsp_establish_audio_connection\n"); 311 hsp_establish_audio_connection = 1; 312 hsp_state = HSP_W4_SCO_CONNECTED; 313 break; 314 case HSP_W4_RFCOMM_CONNECTED: 315 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 316 break; 317 default: 318 break; 319 } 320 hsp_run(); 321 } 322 323 void hsp_ag_release_audio_connection(void){ 324 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 325 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 326 327 hsp_release_audio_connection = 1; 328 hsp_run(); 329 } 330 331 332 void hsp_ag_set_microphone_gain(uint8_t gain){ 333 if (gain < 0 || gain >15) { 334 log_error("Gain must be in interval [0..15], it is given %d", gain); 335 return; 336 } 337 ag_microphone_gain = gain; 338 hsp_run(); 339 } 340 341 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 342 void hsp_ag_set_speaker_gain(uint8_t gain){ 343 if (gain < 0 || gain >15) { 344 log_error("Gain must be in interval [0..15], it is given %d", gain); 345 return; 346 } 347 ag_speaker_gain = gain; 348 hsp_run(); 349 } 350 351 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 352 ag_ring = 1; 353 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 354 btstack_run_loop_add_timer(&hs_timeout); 355 } 356 357 static void hsp_ringing_timer_start(void){ 358 btstack_run_loop_remove_timer(&hs_timeout); 359 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 360 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 361 btstack_run_loop_add_timer(&hs_timeout); 362 } 363 364 static void hsp_ringing_timer_stop(void){ 365 btstack_run_loop_remove_timer(&hs_timeout); 366 } 367 368 void hsp_ag_start_ringing(void){ 369 if (hsp_state != HSP_W2_CONNECT_SCO) return; 370 ag_ring = 1; 371 hsp_state = HSP_W4_RING_ANSWER; 372 hsp_ringing_timer_start(); 373 } 374 375 void hsp_ag_stop_ringing(void){ 376 ag_ring = 0; 377 ag_num_button_press_received = 0; 378 hsp_state = HSP_W2_CONNECT_SCO; 379 hsp_ringing_timer_stop(); 380 } 381 382 static void hsp_run(void){ 383 if (!rfcomm_can_send_packet_now(rfcomm_cid)) return; 384 int err; 385 386 if (ag_send_ok){ 387 ag_send_ok = 0; 388 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 389 if (err){ 390 ag_send_ok = 1; 391 } 392 return; 393 } 394 395 if (ag_send_error){ 396 ag_send_error = 0; 397 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 398 if (err) { 399 ag_send_error = 1; 400 } 401 return; 402 } 403 404 if (hsp_establish_audio_connection){ 405 hsp_establish_audio_connection = 0; 406 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 407 return; 408 } 409 410 if (hsp_release_audio_connection){ 411 hsp_release_audio_connection = 0; 412 gap_disconnect(sco_handle); 413 return; 414 } 415 416 if (hsp_disconnect_rfcomm){ 417 hsp_disconnect_rfcomm = 0; 418 hsp_establish_audio_connection = 0; 419 rfcomm_disconnect(rfcomm_cid); 420 return; 421 } 422 423 switch (hsp_state){ 424 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 425 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 426 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), SDP_HSP); 427 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, SDP_HSP); 428 break; 429 430 case HSP_W4_RING_ANSWER: 431 if (ag_ring){ 432 ag_ring = 0; 433 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 434 if (err) { 435 ag_ring = 1; 436 } 437 break; 438 } 439 440 if (!ag_num_button_press_received) break; 441 ag_send_ok = 0; 442 443 ag_num_button_press_received = 0; 444 hsp_state = HSP_W2_CONNECT_SCO; 445 446 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 447 if (err) { 448 hsp_state = HSP_W4_RING_ANSWER; 449 ag_num_button_press_received = 1; 450 } 451 break; 452 453 case HSP_W2_CONNECT_SCO: 454 hsp_state = HSP_W4_SCO_CONNECTED; 455 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 456 break; 457 458 case HSP_W2_DISCONNECT_SCO: 459 ag_num_button_press_received = 0; 460 461 hsp_state = HSP_W4_SCO_DISCONNECTED; 462 gap_disconnect(sco_handle); 463 break; 464 465 case HSP_W2_DISCONNECT_RFCOMM: 466 rfcomm_disconnect(rfcomm_cid); 467 break; 468 469 case HSP_AUDIO_CONNECTION_ESTABLISHED: 470 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 471 472 if (ag_microphone_gain >= 0){ 473 int gain = ag_microphone_gain; 474 ag_microphone_gain = -1; 475 char buffer[10]; 476 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 477 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 478 if (err) { 479 ag_microphone_gain = gain; 480 } 481 break; 482 } 483 484 if (ag_speaker_gain >= 0){ 485 int gain = ag_speaker_gain; 486 ag_speaker_gain = -1; 487 char buffer[10]; 488 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 489 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 490 if (err) { 491 ag_speaker_gain = gain; 492 } 493 break; 494 } 495 break; 496 default: 497 break; 498 } 499 } 500 501 502 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 503 if (packet_type == RFCOMM_DATA_PACKET){ 504 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 505 size--; 506 packet++; 507 } 508 509 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 510 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 511 ag_send_ok = 1; 512 switch (hsp_state){ 513 case HSP_AUDIO_CONNECTION_ESTABLISHED: 514 hsp_release_audio_connection = 1; 515 break; 516 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 517 hsp_establish_audio_connection = 1; 518 break; 519 default: 520 break; 521 } 522 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 523 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 524 ag_send_ok = 1; 525 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 526 527 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 528 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 529 ag_send_ok = 1; 530 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 531 532 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 533 ag_send_error = 1; 534 if (!hsp_ag_callback) return; 535 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 536 uint8_t * event = packet - 4; 537 event[0] = HCI_EVENT_HSP_META; 538 event[1] = size + 2; 539 event[2] = HSP_SUBEVENT_HS_COMMAND; 540 event[3] = size; 541 (*hsp_ag_callback)(event, size+4); 542 } 543 544 hsp_run(); 545 return; 546 } 547 548 if (packet_type != HCI_EVENT_PACKET) return; 549 uint8_t event = hci_event_packet_get_type(packet); 550 bd_addr_t event_addr; 551 uint16_t handle; 552 553 switch (event) { 554 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 555 int index = 2; 556 uint8_t status = packet[index++]; 557 sco_handle = little_endian_read_16(packet, index); 558 index+=2; 559 bd_addr_t address; 560 memcpy(address, &packet[index], 6); 561 index+=6; 562 uint8_t link_type = packet[index++]; 563 uint8_t transmission_interval = packet[index++]; // measured in slots 564 uint8_t retransmission_interval = packet[index++];// measured in slots 565 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 566 index+=2; 567 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 568 index+=2; 569 uint8_t air_mode = packet[index]; 570 571 if (status != 0){ 572 log_error("(e)SCO Connection failed, status %u", status); 573 emit_event_audio_connected(status, sco_handle); 574 break; 575 } 576 switch (link_type){ 577 case 0x00: 578 log_info("SCO Connection established."); 579 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 580 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 581 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 582 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 583 break; 584 case 0x02: 585 log_info("eSCO Connection established."); 586 break; 587 default: 588 log_error("(e)SCO reserved link_type 0x%2x", link_type); 589 break; 590 } 591 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 592 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 593 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 594 595 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 596 hsp_state = HSP_W2_DISCONNECT_SCO; 597 break; 598 } 599 600 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 601 emit_event_audio_connected(status, sco_handle); 602 break; 603 } 604 605 case RFCOMM_EVENT_INCOMING_CONNECTION: 606 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 607 if (hsp_state != HSP_IDLE) return; 608 609 reverse_bd_addr(&packet[2], event_addr); 610 rfcomm_cid = little_endian_read_16(packet, 9); 611 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 612 hsp_state = HSP_W4_RFCOMM_CONNECTED; 613 rfcomm_accept_connection(rfcomm_cid); 614 break; 615 616 case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE: 617 log_info("RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE packet_handler type %u, packet[0] %x", packet_type, packet[0]); 618 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 619 if (packet[2]) { 620 log_info("RFCOMM channel open failed, status %u§", packet[2]); 621 hsp_ag_reset_state(); 622 hsp_state = HSP_IDLE; 623 } else { 624 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 625 rfcomm_handle = little_endian_read_16(packet, 9); 626 rfcomm_cid = little_endian_read_16(packet, 12); 627 mtu = little_endian_read_16(packet, 14); 628 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 629 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 630 } 631 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 632 break; 633 634 case HCI_EVENT_DISCONNECTION_COMPLETE: 635 handle = little_endian_read_16(packet,3); 636 if (handle == sco_handle){ 637 sco_handle = 0; 638 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 639 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 640 break; 641 } 642 if (handle == rfcomm_handle) { 643 rfcomm_handle = 0; 644 hsp_state = HSP_IDLE; 645 hsp_ag_reset_state(); 646 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 647 } 648 break; 649 650 case RFCOMM_EVENT_CHANNEL_CLOSED: 651 rfcomm_handle = 0; 652 hsp_state = HSP_IDLE; 653 hsp_ag_reset_state(); 654 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 655 break; 656 default: 657 break; 658 } 659 hsp_run(); 660 } 661 662 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 663 switch (packet[0]){ 664 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 665 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 666 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 667 break; 668 case SDP_EVENT_QUERY_COMPLETE: 669 if (channel_nr > 0){ 670 hsp_state = HSP_W4_RFCOMM_CONNECTED; 671 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 672 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 673 break; 674 } 675 hsp_ag_reset_state(); 676 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 677 if (sdp_event_query_complete_get_status(packet)){ 678 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 679 } else { 680 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 681 } 682 break; 683 default: 684 break; 685 } 686 } 687 688 689