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 #define __BTSTACK_FILE__ "hsp_ag.c" 39 40 // ***************************************************************************** 41 // 42 // HSP Audio Gateway 43 // 44 // ***************************************************************************** 45 46 #include "btstack_config.h" 47 48 #include <stdint.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 53 #include "btstack_debug.h" 54 #include "btstack_event.h" 55 #include "btstack_memory.h" 56 #include "btstack_run_loop.h" 57 #include "classic/core.h" 58 #include "classic/sdp_server.h" 59 #include "classic/sdp_client_rfcomm.h" 60 #include "classic/sdp_util.h" 61 #include "hci.h" 62 #include "hci_cmd.h" 63 #include "hci_dump.h" 64 #include "hsp_ag.h" 65 #include "l2cap.h" 66 67 #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" 68 #define HSP_HS_AT_CKPD "AT+CKPD\r\n" 69 #define HSP_AG_OK "\r\nOK\r\n" 70 #define HSP_AG_ERROR "\r\nERROR\r\n" 71 #define HSP_AG_RING "\r\nRING\r\n" 72 #define HSP_MICROPHONE_GAIN "+VGM" 73 #define HSP_SPEAKER_GAIN "+VGS" 74 75 #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" 76 #define HSP_HS_SPEAKER_GAIN "AT+VGS=" 77 78 static const char default_hsp_ag_service_name[] = "Audio Gateway"; 79 80 static bd_addr_t remote; 81 static bd_addr_t sco_event_addr; 82 static uint8_t channel_nr = 0; 83 84 static uint16_t mtu; 85 static uint16_t rfcomm_cid = 0; 86 static uint16_t sco_handle = 0; 87 static uint16_t rfcomm_handle = 0; 88 static btstack_timer_source_t hs_timeout; 89 90 static int ag_microphone_gain = -1; 91 static int ag_speaker_gain = -1; 92 static uint8_t ag_ring = 0; 93 static uint8_t ag_send_ok = 0; 94 static uint8_t ag_send_error = 0; 95 static uint8_t ag_num_button_press_received = 0; 96 static uint8_t ag_support_custom_commands = 0; 97 static uint8_t ag_establish_sco = 0; 98 static uint8_t hsp_disconnect_rfcomm = 0; 99 static uint8_t hsp_establish_audio_connection = 0; 100 static uint8_t hsp_release_audio_connection = 0; 101 102 static btstack_packet_callback_registration_t hci_event_callback_registration; 103 104 typedef enum { 105 HSP_IDLE, 106 HSP_SDP_QUERY_RFCOMM_CHANNEL, 107 HSP_W4_SDP_EVENT_QUERY_COMPLETE, 108 HSP_W4_RFCOMM_CONNECTED, 109 110 HSP_RFCOMM_CONNECTION_ESTABLISHED, 111 112 HSP_W4_RING_ANSWER, 113 HSP_W4_USER_ACTION, 114 HSP_W2_CONNECT_SCO, 115 HSP_W4_SCO_CONNECTED, 116 117 HSP_AUDIO_CONNECTION_ESTABLISHED, 118 119 HSP_W2_DISCONNECT_SCO, 120 HSP_W4_SCO_DISCONNECTED, 121 122 HSP_W2_DISCONNECT_RFCOMM, 123 HSP_W4_RFCOMM_DISCONNECTED, 124 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 125 } hsp_state_t; 126 127 static hsp_state_t hsp_state = HSP_IDLE; 128 129 130 static btstack_packet_handler_t hsp_ag_callback; 131 132 static void hsp_run(void); 133 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 134 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 135 136 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 137 UNUSED(packet_type); 138 UNUSED(channel); 139 UNUSED(event); 140 UNUSED(size); 141 } 142 143 void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){ 144 if (callback == NULL){ 145 callback = &dummy_notify; 146 } 147 hsp_ag_callback = callback; 148 } 149 150 static void emit_event(uint8_t event_subtype, uint8_t value){ 151 if (!hsp_ag_callback) return; 152 uint8_t event[4]; 153 event[0] = HCI_EVENT_HSP_META; 154 event[1] = sizeof(event) - 2; 155 event[2] = event_subtype; 156 event[3] = value; // status 0 == OK 157 (*hsp_ag_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_ag_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_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 169 } 170 171 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 172 uint8_t* attribute; 173 de_create_sequence(service); 174 175 // 0x0000 "Service Record Handle" 176 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle); 177 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 178 179 // 0x0001 "Service Class ID List" 180 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList); 181 attribute = de_push_sequence(service); 182 { 183 // "UUID for PAN Service" 184 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_Headset_AG); 185 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_GenericAudio); 186 } 187 de_pop_sequence(service, attribute); 188 189 // 0x0004 "Protocol Descriptor List" 190 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList); 191 attribute = de_push_sequence(service); 192 { 193 uint8_t* l2cpProtocol = de_push_sequence(attribute); 194 { 195 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol); 196 } 197 de_pop_sequence(attribute, l2cpProtocol); 198 199 uint8_t* rfcomm = de_push_sequence(attribute); 200 { 201 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, SDP_RFCOMMProtocol); // rfcomm_service 202 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 203 } 204 de_pop_sequence(attribute, rfcomm); 205 } 206 de_pop_sequence(service, attribute); 207 208 // 0x0005 "Public Browse Group" 209 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group 210 attribute = de_push_sequence(service); 211 { 212 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup); 213 } 214 de_pop_sequence(service, attribute); 215 216 // 0x0009 "Bluetooth Profile Descriptor List" 217 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList); 218 attribute = de_push_sequence(service); 219 { 220 uint8_t *sppProfile = de_push_sequence(attribute); 221 { 222 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, SDP_HSP); 223 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 224 } 225 de_pop_sequence(attribute, sppProfile); 226 } 227 de_pop_sequence(service, attribute); 228 229 // 0x0100 "Service Name" 230 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 231 if (name){ 232 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 233 } else { 234 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 235 } 236 } 237 238 static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, char * command){ 239 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 240 if (err){ 241 log_error("rfcomm_send_internal -> error 0X%02x", err); 242 return err; 243 } 244 return err; 245 } 246 247 void hsp_ag_enable_custom_commands(int enable){ 248 ag_support_custom_commands = enable; 249 } 250 251 int hsp_ag_send_result(char * result){ 252 if (!ag_support_custom_commands) return 1; 253 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 254 } 255 256 static void hsp_ag_reset_state(void){ 257 hsp_state = HSP_IDLE; 258 259 rfcomm_cid = 0; 260 rfcomm_handle = 0; 261 sco_handle = 0; 262 263 ag_send_ok = 0; 264 ag_send_error = 0; 265 ag_ring = 0; 266 267 ag_num_button_press_received = 0; 268 ag_support_custom_commands = 0; 269 270 ag_microphone_gain = -1; 271 ag_speaker_gain = -1; 272 273 hsp_disconnect_rfcomm = 0; 274 hsp_establish_audio_connection = 0; 275 hsp_release_audio_connection = 0; 276 } 277 278 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 279 // register for HCI events 280 hci_event_callback_registration.callback = &packet_handler; 281 hci_add_event_handler(&hci_event_callback_registration); 282 283 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 284 285 hsp_ag_reset_state(); 286 } 287 288 void hsp_ag_connect(bd_addr_t bd_addr){ 289 if (hsp_state != HSP_IDLE) return; 290 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 291 memcpy(remote, bd_addr, 6); 292 hsp_run(); 293 } 294 295 void hsp_ag_disconnect(void){ 296 hsp_ag_release_audio_connection(); 297 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 298 hsp_state = HSP_IDLE; 299 return; 300 } 301 302 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 303 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 304 return; 305 } 306 hsp_disconnect_rfcomm = 1; 307 hsp_run(); 308 } 309 310 void hsp_ag_establish_audio_connection(void){ 311 switch (hsp_state){ 312 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 313 hsp_establish_audio_connection = 1; 314 hsp_state = HSP_W4_SCO_CONNECTED; 315 break; 316 case HSP_W4_RFCOMM_CONNECTED: 317 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 318 break; 319 default: 320 break; 321 } 322 hsp_run(); 323 } 324 325 void hsp_ag_release_audio_connection(void){ 326 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 327 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 328 329 hsp_release_audio_connection = 1; 330 hsp_run(); 331 } 332 333 334 void hsp_ag_set_microphone_gain(uint8_t gain){ 335 if (gain < 0 || gain >15) { 336 log_error("Gain must be in interval [0..15], it is given %d", gain); 337 return; 338 } 339 ag_microphone_gain = gain; 340 hsp_run(); 341 } 342 343 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 344 void hsp_ag_set_speaker_gain(uint8_t gain){ 345 if (gain < 0 || gain >15) { 346 log_error("Gain must be in interval [0..15], it is given %d", gain); 347 return; 348 } 349 ag_speaker_gain = gain; 350 hsp_run(); 351 } 352 353 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 354 UNUSED(timer); 355 356 ag_ring = 1; 357 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 358 btstack_run_loop_add_timer(&hs_timeout); 359 hsp_run(); 360 } 361 362 static void hsp_ringing_timer_start(void){ 363 btstack_run_loop_remove_timer(&hs_timeout); 364 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 365 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 366 btstack_run_loop_add_timer(&hs_timeout); 367 } 368 369 static void hsp_ringing_timer_stop(void){ 370 btstack_run_loop_remove_timer(&hs_timeout); 371 } 372 373 void hsp_ag_start_ringing(void){ 374 ag_ring = 1; 375 if (hsp_state == HSP_W2_CONNECT_SCO) { 376 hsp_state = HSP_W4_RING_ANSWER; 377 } 378 hsp_ringing_timer_start(); 379 } 380 381 void hsp_ag_stop_ringing(void){ 382 ag_ring = 0; 383 if (hsp_state == HSP_W4_RING_ANSWER){ 384 hsp_state = HSP_W2_CONNECT_SCO; 385 } 386 hsp_ringing_timer_stop(); 387 } 388 389 static void hsp_run(void){ 390 if (ag_establish_sco && hci_can_send_command_packet_now()){ 391 ag_establish_sco = 0; 392 393 log_info("HSP: sending hci_accept_connection_request."); 394 // remote supported feature eSCO is set if link type is eSCO 395 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 396 uint16_t max_latency; 397 uint8_t retransmission_effort; 398 uint16_t packet_types; 399 400 if (hci_remote_esco_supported(rfcomm_handle)){ 401 max_latency = 0x000c; 402 retransmission_effort = 0x02; 403 packet_types = 0x388; 404 } else { 405 max_latency = 0xffff; 406 retransmission_effort = 0xff; 407 packet_types = 0x003f; 408 } 409 410 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 411 412 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 413 hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, max_latency, 414 sco_voice_setting, retransmission_effort, packet_types); 415 return; 416 } 417 418 if (ag_send_ok){ 419 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 420 rfcomm_request_can_send_now_event(rfcomm_cid); 421 return; 422 } 423 ag_send_ok = 0; 424 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 425 return; 426 } 427 428 if (ag_send_error){ 429 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 430 rfcomm_request_can_send_now_event(rfcomm_cid); 431 return; 432 } 433 ag_send_error = 0; 434 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 435 return; 436 } 437 438 if (ag_ring){ 439 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 440 rfcomm_request_can_send_now_event(rfcomm_cid); 441 return; 442 } 443 ag_ring = 0; 444 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 445 return; 446 } 447 448 if (hsp_establish_audio_connection){ 449 if (!hci_can_send_command_packet_now()) return; 450 hsp_establish_audio_connection = 0; 451 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 452 return; 453 } 454 455 if (hsp_release_audio_connection){ 456 hsp_release_audio_connection = 0; 457 gap_disconnect(sco_handle); 458 return; 459 } 460 461 if (hsp_disconnect_rfcomm){ 462 hsp_disconnect_rfcomm = 0; 463 hsp_establish_audio_connection = 0; 464 rfcomm_disconnect(rfcomm_cid); 465 return; 466 } 467 468 switch (hsp_state){ 469 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 470 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 471 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), SDP_HSP); 472 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, SDP_HSP); 473 break; 474 475 case HSP_W4_RING_ANSWER: 476 if (!ag_num_button_press_received) break; 477 478 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 479 rfcomm_request_can_send_now_event(rfcomm_cid); 480 return; 481 } 482 483 ag_send_ok = 0; 484 ag_num_button_press_received = 0; 485 hsp_state = HSP_W2_CONNECT_SCO; 486 487 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 488 break; 489 490 case HSP_W2_CONNECT_SCO: 491 if (!hci_can_send_command_packet_now()) return; 492 hsp_state = HSP_W4_SCO_CONNECTED; 493 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 494 break; 495 496 case HSP_W2_DISCONNECT_SCO: 497 ag_num_button_press_received = 0; 498 499 hsp_state = HSP_W4_SCO_DISCONNECTED; 500 gap_disconnect(sco_handle); 501 break; 502 503 case HSP_W2_DISCONNECT_RFCOMM: 504 rfcomm_disconnect(rfcomm_cid); 505 break; 506 507 case HSP_AUDIO_CONNECTION_ESTABLISHED: 508 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 509 510 if (ag_microphone_gain >= 0){ 511 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 512 rfcomm_request_can_send_now_event(rfcomm_cid); 513 return; 514 } 515 int gain = ag_microphone_gain; 516 ag_microphone_gain = -1; 517 char buffer[10]; 518 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 519 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 520 break; 521 } 522 523 if (ag_speaker_gain >= 0){ 524 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 525 rfcomm_request_can_send_now_event(rfcomm_cid); 526 return; 527 } 528 int gain = ag_speaker_gain; 529 ag_speaker_gain = -1; 530 char buffer[10]; 531 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 532 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 533 break; 534 } 535 break; 536 default: 537 break; 538 } 539 } 540 541 542 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 543 UNUSED(channel); 544 545 if (packet_type == RFCOMM_DATA_PACKET){ 546 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 547 size--; 548 packet++; 549 } 550 551 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 552 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 553 ag_send_ok = 1; 554 switch (hsp_state){ 555 case HSP_AUDIO_CONNECTION_ESTABLISHED: 556 hsp_release_audio_connection = 1; 557 break; 558 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 559 hsp_establish_audio_connection = 1; 560 break; 561 default: 562 break; 563 } 564 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 565 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 566 ag_send_ok = 1; 567 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 568 569 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 570 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 571 ag_send_ok = 1; 572 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 573 574 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 575 ag_send_error = 1; 576 if (!hsp_ag_callback) return; 577 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 578 uint8_t * event = packet - 4; 579 event[0] = HCI_EVENT_HSP_META; 580 event[1] = size + 2; 581 event[2] = HSP_SUBEVENT_HS_COMMAND; 582 event[3] = size; 583 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 584 } 585 586 hsp_run(); 587 return; 588 } 589 590 if (packet_type != HCI_EVENT_PACKET) return; 591 uint8_t event = hci_event_packet_get_type(packet); 592 bd_addr_t event_addr; 593 uint16_t handle; 594 595 switch (event) { 596 case HCI_EVENT_CONNECTION_REQUEST: 597 hci_event_connection_request_get_bd_addr(packet, sco_event_addr); 598 ag_establish_sco = 1; 599 break; 600 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 601 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 602 if (status != 0){ 603 log_error("(e)SCO Connection failed, status %u", status); 604 emit_event_audio_connected(status, sco_handle); 605 break; 606 } 607 608 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 609 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 610 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 611 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 612 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 613 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 614 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 615 uint8_t air_mode = hci_event_synchronous_connection_complete_get_air_mode(packet); 616 617 switch (link_type){ 618 case 0x00: 619 log_info("SCO Connection established."); 620 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 621 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 622 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 623 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 624 break; 625 case 0x02: 626 log_info("eSCO Connection established."); 627 break; 628 default: 629 log_error("(e)SCO reserved link_type 0x%2x", link_type); 630 break; 631 } 632 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 633 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 634 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 635 636 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 637 hsp_state = HSP_W2_DISCONNECT_SCO; 638 break; 639 } 640 641 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 642 emit_event_audio_connected(status, sco_handle); 643 break; 644 } 645 646 case RFCOMM_EVENT_INCOMING_CONNECTION: 647 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 648 if (hsp_state != HSP_IDLE) return; 649 650 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 651 rfcomm_cid = rfcomm_event_incoming_connection_get_server_channel(packet); 652 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 653 hsp_state = HSP_W4_RFCOMM_CONNECTED; 654 rfcomm_accept_connection(rfcomm_cid); 655 break; 656 657 case RFCOMM_EVENT_CHANNEL_OPENED: 658 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 659 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 660 if (rfcomm_event_channel_opened_get_status(packet)) { 661 log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet)); 662 hsp_ag_reset_state(); 663 hsp_state = HSP_IDLE; 664 } else { 665 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 666 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 667 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 668 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 669 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 670 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 671 } 672 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 673 break; 674 675 case RFCOMM_EVENT_CHANNEL_CLOSED: 676 rfcomm_handle = 0; 677 hsp_state = HSP_IDLE; 678 hsp_ag_reset_state(); 679 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 680 break; 681 682 case RFCOMM_EVENT_CAN_SEND_NOW: 683 hsp_run(); 684 break; 685 686 case HCI_EVENT_DISCONNECTION_COMPLETE: 687 handle = little_endian_read_16(packet,3); 688 if (handle == sco_handle){ 689 sco_handle = 0; 690 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 691 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 692 break; 693 } 694 if (handle == rfcomm_handle) { 695 rfcomm_handle = 0; 696 hsp_state = HSP_IDLE; 697 hsp_ag_reset_state(); 698 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 699 } 700 break; 701 702 default: 703 break; 704 } 705 706 hsp_run(); 707 } 708 709 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 710 UNUSED(packet_type); 711 UNUSED(channel); 712 UNUSED(size); 713 714 switch (packet[0]){ 715 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 716 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 717 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 718 break; 719 case SDP_EVENT_QUERY_COMPLETE: 720 if (channel_nr > 0){ 721 hsp_state = HSP_W4_RFCOMM_CONNECTED; 722 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 723 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 724 break; 725 } 726 hsp_ag_reset_state(); 727 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 728 if (sdp_event_query_complete_get_status(packet)){ 729 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 730 } else { 731 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 732 } 733 break; 734 default: 735 break; 736 } 737 } 738 739 740