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/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_ag.h" 63 #include "l2cap.h" 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 bd_addr_t sco_event_addr; 80 static uint8_t channel_nr = 0; 81 82 static uint16_t mtu; 83 static uint16_t rfcomm_cid = 0; 84 static uint16_t sco_handle = 0; 85 static uint16_t rfcomm_handle = 0; 86 static btstack_timer_source_t hs_timeout; 87 88 static int ag_microphone_gain = -1; 89 static int ag_speaker_gain = -1; 90 static uint8_t ag_ring = 0; 91 static uint8_t ag_send_ok = 0; 92 static uint8_t ag_send_error = 0; 93 static uint8_t ag_num_button_press_received = 0; 94 static uint8_t ag_support_custom_commands = 0; 95 static uint8_t ag_establish_sco = 0; 96 static uint8_t hsp_disconnect_rfcomm = 0; 97 static uint8_t hsp_establish_audio_connection = 0; 98 static uint8_t hsp_release_audio_connection = 0; 99 100 static btstack_packet_callback_registration_t hci_event_callback_registration; 101 102 typedef enum { 103 HSP_IDLE, 104 HSP_SDP_QUERY_RFCOMM_CHANNEL, 105 HSP_W4_SDP_EVENT_QUERY_COMPLETE, 106 HSP_W4_RFCOMM_CONNECTED, 107 108 HSP_RFCOMM_CONNECTION_ESTABLISHED, 109 110 HSP_W4_RING_ANSWER, 111 HSP_W4_USER_ACTION, 112 HSP_W2_CONNECT_SCO, 113 HSP_W4_SCO_CONNECTED, 114 115 HSP_AUDIO_CONNECTION_ESTABLISHED, 116 117 HSP_W2_DISCONNECT_SCO, 118 HSP_W4_SCO_DISCONNECTED, 119 120 HSP_W2_DISCONNECT_RFCOMM, 121 HSP_W4_RFCOMM_DISCONNECTED, 122 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 123 } hsp_state_t; 124 125 static hsp_state_t hsp_state = HSP_IDLE; 126 127 128 static btstack_packet_handler_t hsp_ag_callback; 129 130 static void hsp_run(void); 131 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 132 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 133 134 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 135 UNUSED(packet_type); 136 UNUSED(channel); 137 UNUSED(event); 138 UNUSED(size); 139 } 140 141 void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){ 142 if (callback == NULL){ 143 callback = &dummy_notify; 144 } 145 hsp_ag_callback = callback; 146 } 147 148 static void emit_event(uint8_t event_subtype, uint8_t value){ 149 if (!hsp_ag_callback) return; 150 uint8_t event[4]; 151 event[0] = HCI_EVENT_HSP_META; 152 event[1] = sizeof(event) - 2; 153 event[2] = event_subtype; 154 event[3] = value; // status 0 == OK 155 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 156 } 157 158 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 159 if (!hsp_ag_callback) return; 160 uint8_t event[6]; 161 event[0] = HCI_EVENT_HSP_META; 162 event[1] = sizeof(event) - 2; 163 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 164 event[3] = status; 165 little_endian_store_16(event, 4, handle); 166 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 167 } 168 169 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 170 uint8_t* attribute; 171 de_create_sequence(service); 172 173 // 0x0000 "Service Record Handle" 174 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle); 175 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 176 177 // 0x0001 "Service Class ID List" 178 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList); 179 attribute = de_push_sequence(service); 180 { 181 // "UUID for PAN Service" 182 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_Headset_AG); 183 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_GenericAudio); 184 } 185 de_pop_sequence(service, attribute); 186 187 // 0x0004 "Protocol Descriptor List" 188 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList); 189 attribute = de_push_sequence(service); 190 { 191 uint8_t* l2cpProtocol = de_push_sequence(attribute); 192 { 193 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol); 194 } 195 de_pop_sequence(attribute, l2cpProtocol); 196 197 uint8_t* rfcomm = de_push_sequence(attribute); 198 { 199 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, SDP_RFCOMMProtocol); // rfcomm_service 200 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 201 } 202 de_pop_sequence(attribute, rfcomm); 203 } 204 de_pop_sequence(service, attribute); 205 206 // 0x0005 "Public Browse Group" 207 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group 208 attribute = de_push_sequence(service); 209 { 210 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup); 211 } 212 de_pop_sequence(service, attribute); 213 214 // 0x0009 "Bluetooth Profile Descriptor List" 215 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList); 216 attribute = de_push_sequence(service); 217 { 218 uint8_t *sppProfile = de_push_sequence(attribute); 219 { 220 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, SDP_HSP); 221 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 222 } 223 de_pop_sequence(attribute, sppProfile); 224 } 225 de_pop_sequence(service, attribute); 226 227 // 0x0100 "Service Name" 228 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 229 if (name){ 230 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 231 } else { 232 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 233 } 234 } 235 236 static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, char * command){ 237 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 238 if (err){ 239 log_error("rfcomm_send_internal -> error 0X%02x", err); 240 return err; 241 } 242 return err; 243 } 244 245 void hsp_ag_enable_custom_commands(int enable){ 246 ag_support_custom_commands = enable; 247 } 248 249 int hsp_ag_send_result(char * result){ 250 if (!ag_support_custom_commands) return 1; 251 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 252 } 253 254 static void hsp_ag_reset_state(void){ 255 hsp_state = HSP_IDLE; 256 257 rfcomm_cid = 0; 258 rfcomm_handle = 0; 259 sco_handle = 0; 260 261 ag_send_ok = 0; 262 ag_send_error = 0; 263 ag_ring = 0; 264 265 ag_num_button_press_received = 0; 266 ag_support_custom_commands = 0; 267 268 ag_microphone_gain = -1; 269 ag_speaker_gain = -1; 270 271 hsp_disconnect_rfcomm = 0; 272 hsp_establish_audio_connection = 0; 273 hsp_release_audio_connection = 0; 274 } 275 276 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 277 // register for HCI events 278 hci_event_callback_registration.callback = &packet_handler; 279 hci_add_event_handler(&hci_event_callback_registration); 280 281 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 282 283 hsp_ag_reset_state(); 284 } 285 286 void hsp_ag_connect(bd_addr_t bd_addr){ 287 if (hsp_state != HSP_IDLE) return; 288 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 289 memcpy(remote, bd_addr, 6); 290 hsp_run(); 291 } 292 293 void hsp_ag_disconnect(void){ 294 hsp_ag_release_audio_connection(); 295 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 296 hsp_state = HSP_IDLE; 297 return; 298 } 299 300 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 301 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 302 return; 303 } 304 hsp_disconnect_rfcomm = 1; 305 hsp_run(); 306 } 307 308 void hsp_ag_establish_audio_connection(void){ 309 switch (hsp_state){ 310 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 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 UNUSED(timer); 353 354 ag_ring = 1; 355 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 356 btstack_run_loop_add_timer(&hs_timeout); 357 hsp_run(); 358 } 359 360 static void hsp_ringing_timer_start(void){ 361 btstack_run_loop_remove_timer(&hs_timeout); 362 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 363 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 364 btstack_run_loop_add_timer(&hs_timeout); 365 } 366 367 static void hsp_ringing_timer_stop(void){ 368 btstack_run_loop_remove_timer(&hs_timeout); 369 } 370 371 void hsp_ag_start_ringing(void){ 372 ag_ring = 1; 373 if (hsp_state == HSP_W2_CONNECT_SCO) { 374 hsp_state = HSP_W4_RING_ANSWER; 375 } 376 hsp_ringing_timer_start(); 377 } 378 379 void hsp_ag_stop_ringing(void){ 380 ag_ring = 0; 381 if (hsp_state == HSP_W4_RING_ANSWER){ 382 hsp_state = HSP_W2_CONNECT_SCO; 383 } 384 hsp_ringing_timer_stop(); 385 } 386 387 static void hsp_run(void){ 388 if (ag_establish_sco && hci_can_send_command_packet_now()){ 389 ag_establish_sco = 0; 390 391 log_info("HSP: sending hci_accept_connection_request."); 392 // remote supported feature eSCO is set if link type is eSCO 393 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 394 uint16_t max_latency; 395 uint8_t retransmission_effort; 396 uint16_t packet_types; 397 398 if (hci_remote_esco_supported(rfcomm_handle)){ 399 max_latency = 0x000c; 400 retransmission_effort = 0x02; 401 packet_types = 0x388; 402 } else { 403 max_latency = 0xffff; 404 retransmission_effort = 0xff; 405 packet_types = 0x003f; 406 } 407 408 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 409 410 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 411 hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, max_latency, 412 sco_voice_setting, retransmission_effort, packet_types); 413 return; 414 } 415 416 if (ag_send_ok){ 417 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 418 rfcomm_request_can_send_now_event(rfcomm_cid); 419 return; 420 } 421 ag_send_ok = 0; 422 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 423 return; 424 } 425 426 if (ag_send_error){ 427 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 428 rfcomm_request_can_send_now_event(rfcomm_cid); 429 return; 430 } 431 ag_send_error = 0; 432 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 433 return; 434 } 435 436 if (ag_ring){ 437 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 438 rfcomm_request_can_send_now_event(rfcomm_cid); 439 return; 440 } 441 ag_ring = 0; 442 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 443 return; 444 } 445 446 if (hsp_establish_audio_connection){ 447 if (!hci_can_send_command_packet_now()) return; 448 hsp_establish_audio_connection = 0; 449 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 450 return; 451 } 452 453 if (hsp_release_audio_connection){ 454 hsp_release_audio_connection = 0; 455 gap_disconnect(sco_handle); 456 return; 457 } 458 459 if (hsp_disconnect_rfcomm){ 460 hsp_disconnect_rfcomm = 0; 461 hsp_establish_audio_connection = 0; 462 rfcomm_disconnect(rfcomm_cid); 463 return; 464 } 465 466 switch (hsp_state){ 467 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 468 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 469 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), SDP_HSP); 470 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, SDP_HSP); 471 break; 472 473 case HSP_W4_RING_ANSWER: 474 if (!ag_num_button_press_received) break; 475 476 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 477 rfcomm_request_can_send_now_event(rfcomm_cid); 478 return; 479 } 480 481 ag_send_ok = 0; 482 ag_num_button_press_received = 0; 483 hsp_state = HSP_W2_CONNECT_SCO; 484 485 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 486 break; 487 488 case HSP_W2_CONNECT_SCO: 489 if (!hci_can_send_command_packet_now()) return; 490 hsp_state = HSP_W4_SCO_CONNECTED; 491 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 492 break; 493 494 case HSP_W2_DISCONNECT_SCO: 495 ag_num_button_press_received = 0; 496 497 hsp_state = HSP_W4_SCO_DISCONNECTED; 498 gap_disconnect(sco_handle); 499 break; 500 501 case HSP_W2_DISCONNECT_RFCOMM: 502 rfcomm_disconnect(rfcomm_cid); 503 break; 504 505 case HSP_AUDIO_CONNECTION_ESTABLISHED: 506 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 507 508 if (ag_microphone_gain >= 0){ 509 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 510 rfcomm_request_can_send_now_event(rfcomm_cid); 511 return; 512 } 513 int gain = ag_microphone_gain; 514 ag_microphone_gain = -1; 515 char buffer[10]; 516 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 517 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 518 break; 519 } 520 521 if (ag_speaker_gain >= 0){ 522 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 523 rfcomm_request_can_send_now_event(rfcomm_cid); 524 return; 525 } 526 int gain = ag_speaker_gain; 527 ag_speaker_gain = -1; 528 char buffer[10]; 529 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 530 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 531 break; 532 } 533 break; 534 default: 535 break; 536 } 537 } 538 539 540 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 541 UNUSED(channel); 542 543 if (packet_type == RFCOMM_DATA_PACKET){ 544 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 545 size--; 546 packet++; 547 } 548 549 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 550 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 551 ag_send_ok = 1; 552 switch (hsp_state){ 553 case HSP_AUDIO_CONNECTION_ESTABLISHED: 554 hsp_release_audio_connection = 1; 555 break; 556 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 557 hsp_establish_audio_connection = 1; 558 break; 559 default: 560 break; 561 } 562 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 563 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 564 ag_send_ok = 1; 565 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 566 567 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 568 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 569 ag_send_ok = 1; 570 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 571 572 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 573 ag_send_error = 1; 574 if (!hsp_ag_callback) return; 575 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 576 uint8_t * event = packet - 4; 577 event[0] = HCI_EVENT_HSP_META; 578 event[1] = size + 2; 579 event[2] = HSP_SUBEVENT_HS_COMMAND; 580 event[3] = size; 581 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 582 } 583 584 hsp_run(); 585 return; 586 } 587 588 if (packet_type != HCI_EVENT_PACKET) return; 589 uint8_t event = hci_event_packet_get_type(packet); 590 bd_addr_t event_addr; 591 uint16_t handle; 592 593 switch (event) { 594 case HCI_EVENT_CONNECTION_REQUEST: 595 hci_event_connection_request_get_bd_addr(packet, sco_event_addr); 596 ag_establish_sco = 1; 597 break; 598 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 599 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 600 if (status != 0){ 601 log_error("(e)SCO Connection failed, status %u", status); 602 emit_event_audio_connected(status, sco_handle); 603 break; 604 } 605 606 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 607 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 608 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 609 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 610 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 611 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 612 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 613 uint8_t air_mode = hci_event_synchronous_connection_complete_get_air_mode(packet); 614 615 switch (link_type){ 616 case 0x00: 617 log_info("SCO Connection established."); 618 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 619 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 620 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 621 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 622 break; 623 case 0x02: 624 log_info("eSCO Connection established."); 625 break; 626 default: 627 log_error("(e)SCO reserved link_type 0x%2x", link_type); 628 break; 629 } 630 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 631 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 632 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 633 634 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 635 hsp_state = HSP_W2_DISCONNECT_SCO; 636 break; 637 } 638 639 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 640 emit_event_audio_connected(status, sco_handle); 641 break; 642 } 643 644 case RFCOMM_EVENT_INCOMING_CONNECTION: 645 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 646 if (hsp_state != HSP_IDLE) return; 647 648 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 649 rfcomm_cid = rfcomm_event_incoming_connection_get_server_channel(packet); 650 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 651 hsp_state = HSP_W4_RFCOMM_CONNECTED; 652 rfcomm_accept_connection(rfcomm_cid); 653 break; 654 655 case RFCOMM_EVENT_CHANNEL_OPENED: 656 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 657 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 658 if (rfcomm_event_channel_opened_get_status(packet)) { 659 log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet)); 660 hsp_ag_reset_state(); 661 hsp_state = HSP_IDLE; 662 } else { 663 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 664 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 665 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 666 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 667 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 668 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 669 } 670 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 671 break; 672 673 case RFCOMM_EVENT_CHANNEL_CLOSED: 674 rfcomm_handle = 0; 675 hsp_state = HSP_IDLE; 676 hsp_ag_reset_state(); 677 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 678 break; 679 680 case RFCOMM_EVENT_CAN_SEND_NOW: 681 hsp_run(); 682 break; 683 684 case HCI_EVENT_DISCONNECTION_COMPLETE: 685 handle = little_endian_read_16(packet,3); 686 if (handle == sco_handle){ 687 sco_handle = 0; 688 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 689 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 690 break; 691 } 692 if (handle == rfcomm_handle) { 693 rfcomm_handle = 0; 694 hsp_state = HSP_IDLE; 695 hsp_ag_reset_state(); 696 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 697 } 698 break; 699 700 default: 701 break; 702 } 703 704 hsp_run(); 705 } 706 707 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 708 UNUSED(packet_type); 709 UNUSED(channel); 710 UNUSED(size); 711 712 switch (packet[0]){ 713 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 714 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 715 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 716 break; 717 case SDP_EVENT_QUERY_COMPLETE: 718 if (channel_nr > 0){ 719 hsp_state = HSP_W4_RFCOMM_CONNECTED; 720 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 721 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 722 break; 723 } 724 hsp_ag_reset_state(); 725 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 726 if (sdp_event_query_complete_get_status(packet)){ 727 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 728 } else { 729 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 730 } 731 break; 732 default: 733 break; 734 } 735 } 736 737 738