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){} 135 136 void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){ 137 if (callback == NULL){ 138 callback = &dummy_notify; 139 } 140 hsp_ag_callback = callback; 141 } 142 143 static void emit_event(uint8_t event_subtype, uint8_t value){ 144 if (!hsp_ag_callback) return; 145 uint8_t event[4]; 146 event[0] = HCI_EVENT_HSP_META; 147 event[1] = sizeof(event) - 2; 148 event[2] = event_subtype; 149 event[3] = value; // status 0 == OK 150 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 151 } 152 153 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 154 if (!hsp_ag_callback) return; 155 uint8_t event[6]; 156 event[0] = HCI_EVENT_HSP_META; 157 event[1] = sizeof(event) - 2; 158 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 159 event[3] = status; 160 little_endian_store_16(event, 4, handle); 161 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 162 } 163 164 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 165 uint8_t* attribute; 166 de_create_sequence(service); 167 168 // 0x0000 "Service Record Handle" 169 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle); 170 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 171 172 // 0x0001 "Service Class ID List" 173 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList); 174 attribute = de_push_sequence(service); 175 { 176 // "UUID for PAN Service" 177 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_Headset_AG); 178 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_GenericAudio); 179 } 180 de_pop_sequence(service, attribute); 181 182 // 0x0004 "Protocol Descriptor List" 183 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList); 184 attribute = de_push_sequence(service); 185 { 186 uint8_t* l2cpProtocol = de_push_sequence(attribute); 187 { 188 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol); 189 } 190 de_pop_sequence(attribute, l2cpProtocol); 191 192 uint8_t* rfcomm = de_push_sequence(attribute); 193 { 194 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, SDP_RFCOMMProtocol); // rfcomm_service 195 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 196 } 197 de_pop_sequence(attribute, rfcomm); 198 } 199 de_pop_sequence(service, attribute); 200 201 // 0x0005 "Public Browse Group" 202 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group 203 attribute = de_push_sequence(service); 204 { 205 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup); 206 } 207 de_pop_sequence(service, attribute); 208 209 // 0x0009 "Bluetooth Profile Descriptor List" 210 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList); 211 attribute = de_push_sequence(service); 212 { 213 uint8_t *sppProfile = de_push_sequence(attribute); 214 { 215 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, SDP_HSP); 216 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 217 } 218 de_pop_sequence(attribute, sppProfile); 219 } 220 de_pop_sequence(service, attribute); 221 222 // 0x0100 "Service Name" 223 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 224 if (name){ 225 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 226 } else { 227 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 228 } 229 } 230 231 static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, char * command){ 232 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 233 if (err){ 234 log_error("rfcomm_send_internal -> error 0X%02x", err); 235 return err; 236 } 237 return err; 238 } 239 240 void hsp_ag_enable_custom_commands(int enable){ 241 ag_support_custom_commands = enable; 242 } 243 244 int hsp_ag_send_result(char * result){ 245 if (!ag_support_custom_commands) return 1; 246 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 247 } 248 249 static void hsp_ag_reset_state(void){ 250 hsp_state = HSP_IDLE; 251 252 rfcomm_cid = 0; 253 rfcomm_handle = 0; 254 sco_handle = 0; 255 256 ag_send_ok = 0; 257 ag_send_error = 0; 258 ag_ring = 0; 259 260 ag_num_button_press_received = 0; 261 ag_support_custom_commands = 0; 262 263 ag_microphone_gain = -1; 264 ag_speaker_gain = -1; 265 266 hsp_disconnect_rfcomm = 0; 267 hsp_establish_audio_connection = 0; 268 hsp_release_audio_connection = 0; 269 } 270 271 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 272 // register for HCI events 273 hci_event_callback_registration.callback = &packet_handler; 274 hci_add_event_handler(&hci_event_callback_registration); 275 276 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 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 hsp_ag_release_audio_connection(); 290 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 291 hsp_state = HSP_IDLE; 292 return; 293 } 294 295 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 296 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 297 return; 298 } 299 hsp_disconnect_rfcomm = 1; 300 hsp_run(); 301 } 302 303 void hsp_ag_establish_audio_connection(void){ 304 switch (hsp_state){ 305 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 306 hsp_establish_audio_connection = 1; 307 hsp_state = HSP_W4_SCO_CONNECTED; 308 break; 309 case HSP_W4_RFCOMM_CONNECTED: 310 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 311 break; 312 default: 313 break; 314 } 315 hsp_run(); 316 } 317 318 void hsp_ag_release_audio_connection(void){ 319 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 320 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 321 322 hsp_release_audio_connection = 1; 323 hsp_run(); 324 } 325 326 327 void hsp_ag_set_microphone_gain(uint8_t gain){ 328 if (gain < 0 || gain >15) { 329 log_error("Gain must be in interval [0..15], it is given %d", gain); 330 return; 331 } 332 ag_microphone_gain = gain; 333 hsp_run(); 334 } 335 336 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 337 void hsp_ag_set_speaker_gain(uint8_t gain){ 338 if (gain < 0 || gain >15) { 339 log_error("Gain must be in interval [0..15], it is given %d", gain); 340 return; 341 } 342 ag_speaker_gain = gain; 343 hsp_run(); 344 } 345 346 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 347 ag_ring = 1; 348 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 349 btstack_run_loop_add_timer(&hs_timeout); 350 hsp_run(); 351 } 352 353 static void hsp_ringing_timer_start(void){ 354 btstack_run_loop_remove_timer(&hs_timeout); 355 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 356 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 357 btstack_run_loop_add_timer(&hs_timeout); 358 } 359 360 static void hsp_ringing_timer_stop(void){ 361 btstack_run_loop_remove_timer(&hs_timeout); 362 } 363 364 void hsp_ag_start_ringing(void){ 365 ag_ring = 1; 366 if (hsp_state == HSP_W2_CONNECT_SCO) { 367 hsp_state = HSP_W4_RING_ANSWER; 368 } 369 hsp_ringing_timer_start(); 370 } 371 372 void hsp_ag_stop_ringing(void){ 373 ag_ring = 0; 374 if (hsp_state == HSP_W4_RING_ANSWER){ 375 hsp_state = HSP_W2_CONNECT_SCO; 376 } 377 hsp_ringing_timer_stop(); 378 } 379 380 static void hsp_run(void){ 381 if (ag_establish_sco && hci_can_send_command_packet_now()){ 382 ag_establish_sco = 0; 383 384 log_info("HSP: sending hci_accept_connection_request."); 385 // remote supported feature eSCO is set if link type is eSCO 386 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 387 uint16_t max_latency; 388 uint8_t retransmission_effort; 389 uint16_t packet_types; 390 391 if (hci_remote_esco_supported(rfcomm_handle)){ 392 max_latency = 0x000c; 393 retransmission_effort = 0x02; 394 packet_types = 0x388; 395 } else { 396 max_latency = 0xffff; 397 retransmission_effort = 0xff; 398 packet_types = 0x003f; 399 } 400 401 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 402 403 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 404 hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, max_latency, 405 sco_voice_setting, retransmission_effort, packet_types); 406 return; 407 } 408 409 if (ag_send_ok){ 410 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 411 rfcomm_request_can_send_now_event(rfcomm_cid); 412 return; 413 } 414 ag_send_ok = 0; 415 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 416 return; 417 } 418 419 if (ag_send_error){ 420 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 421 rfcomm_request_can_send_now_event(rfcomm_cid); 422 return; 423 } 424 ag_send_error = 0; 425 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 426 return; 427 } 428 429 if (ag_ring){ 430 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 431 rfcomm_request_can_send_now_event(rfcomm_cid); 432 return; 433 } 434 ag_ring = 0; 435 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 436 return; 437 } 438 439 if (hsp_establish_audio_connection){ 440 if (!hci_can_send_command_packet_now()) return; 441 hsp_establish_audio_connection = 0; 442 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 443 return; 444 } 445 446 if (hsp_release_audio_connection){ 447 hsp_release_audio_connection = 0; 448 gap_disconnect(sco_handle); 449 return; 450 } 451 452 if (hsp_disconnect_rfcomm){ 453 hsp_disconnect_rfcomm = 0; 454 hsp_establish_audio_connection = 0; 455 rfcomm_disconnect(rfcomm_cid); 456 return; 457 } 458 459 switch (hsp_state){ 460 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 461 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 462 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), SDP_HSP); 463 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, SDP_HSP); 464 break; 465 466 case HSP_W4_RING_ANSWER: 467 if (!ag_num_button_press_received) break; 468 469 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 470 rfcomm_request_can_send_now_event(rfcomm_cid); 471 return; 472 } 473 474 ag_send_ok = 0; 475 ag_num_button_press_received = 0; 476 hsp_state = HSP_W2_CONNECT_SCO; 477 478 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 479 break; 480 481 case HSP_W2_CONNECT_SCO: 482 if (!hci_can_send_command_packet_now()) return; 483 hsp_state = HSP_W4_SCO_CONNECTED; 484 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 485 break; 486 487 case HSP_W2_DISCONNECT_SCO: 488 ag_num_button_press_received = 0; 489 490 hsp_state = HSP_W4_SCO_DISCONNECTED; 491 gap_disconnect(sco_handle); 492 break; 493 494 case HSP_W2_DISCONNECT_RFCOMM: 495 rfcomm_disconnect(rfcomm_cid); 496 break; 497 498 case HSP_AUDIO_CONNECTION_ESTABLISHED: 499 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 500 501 if (ag_microphone_gain >= 0){ 502 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 503 rfcomm_request_can_send_now_event(rfcomm_cid); 504 return; 505 } 506 int gain = ag_microphone_gain; 507 ag_microphone_gain = -1; 508 char buffer[10]; 509 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 510 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 511 break; 512 } 513 514 if (ag_speaker_gain >= 0){ 515 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 516 rfcomm_request_can_send_now_event(rfcomm_cid); 517 return; 518 } 519 int gain = ag_speaker_gain; 520 ag_speaker_gain = -1; 521 char buffer[10]; 522 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 523 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 524 break; 525 } 526 break; 527 default: 528 break; 529 } 530 } 531 532 533 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 534 if (packet_type == RFCOMM_DATA_PACKET){ 535 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 536 size--; 537 packet++; 538 } 539 540 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 541 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 542 ag_send_ok = 1; 543 switch (hsp_state){ 544 case HSP_AUDIO_CONNECTION_ESTABLISHED: 545 hsp_release_audio_connection = 1; 546 break; 547 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 548 hsp_establish_audio_connection = 1; 549 break; 550 default: 551 break; 552 } 553 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 554 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 555 ag_send_ok = 1; 556 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 557 558 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 559 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 560 ag_send_ok = 1; 561 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 562 563 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 564 ag_send_error = 1; 565 if (!hsp_ag_callback) return; 566 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 567 uint8_t * event = packet - 4; 568 event[0] = HCI_EVENT_HSP_META; 569 event[1] = size + 2; 570 event[2] = HSP_SUBEVENT_HS_COMMAND; 571 event[3] = size; 572 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 573 } 574 575 hsp_run(); 576 return; 577 } 578 579 if (packet_type != HCI_EVENT_PACKET) return; 580 uint8_t event = hci_event_packet_get_type(packet); 581 bd_addr_t event_addr; 582 uint16_t handle; 583 584 switch (event) { 585 case HCI_EVENT_CONNECTION_REQUEST: 586 printf("hsp HCI_EVENT_CONNECTION_REQUEST\n"); 587 hci_event_connection_request_get_bd_addr(packet, sco_event_addr); 588 ag_establish_sco = 1; 589 break; 590 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 591 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 592 if (status != 0){ 593 log_error("(e)SCO Connection failed, status %u", status); 594 emit_event_audio_connected(status, sco_handle); 595 break; 596 } 597 598 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 599 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 600 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 601 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 602 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 603 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 604 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 605 uint8_t air_mode = hci_event_synchronous_connection_complete_get_air_mode(packet); 606 607 switch (link_type){ 608 case 0x00: 609 log_info("SCO Connection established."); 610 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 611 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 612 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 613 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 614 break; 615 case 0x02: 616 log_info("eSCO Connection established."); 617 break; 618 default: 619 log_error("(e)SCO reserved link_type 0x%2x", link_type); 620 break; 621 } 622 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 623 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 624 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 625 626 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 627 hsp_state = HSP_W2_DISCONNECT_SCO; 628 break; 629 } 630 631 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 632 emit_event_audio_connected(status, sco_handle); 633 break; 634 } 635 636 case RFCOMM_EVENT_INCOMING_CONNECTION: 637 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 638 if (hsp_state != HSP_IDLE) return; 639 640 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 641 rfcomm_cid = rfcomm_event_incoming_connection_get_server_channel(packet); 642 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 643 hsp_state = HSP_W4_RFCOMM_CONNECTED; 644 rfcomm_accept_connection(rfcomm_cid); 645 break; 646 647 case RFCOMM_EVENT_CHANNEL_OPENED: 648 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 649 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 650 if (rfcomm_event_channel_opened_get_status(packet)) { 651 log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet)); 652 hsp_ag_reset_state(); 653 hsp_state = HSP_IDLE; 654 } else { 655 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 656 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 657 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 658 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 659 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 660 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 661 } 662 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 663 break; 664 665 case RFCOMM_EVENT_CHANNEL_CLOSED: 666 rfcomm_handle = 0; 667 hsp_state = HSP_IDLE; 668 hsp_ag_reset_state(); 669 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 670 break; 671 672 case RFCOMM_EVENT_CAN_SEND_NOW: 673 hsp_run(); 674 break; 675 676 case HCI_EVENT_DISCONNECTION_COMPLETE: 677 handle = little_endian_read_16(packet,3); 678 if (handle == sco_handle){ 679 sco_handle = 0; 680 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 681 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 682 break; 683 } 684 if (handle == rfcomm_handle) { 685 rfcomm_handle = 0; 686 hsp_state = HSP_IDLE; 687 hsp_ag_reset_state(); 688 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 689 } 690 break; 691 692 default: 693 break; 694 } 695 696 hsp_run(); 697 } 698 699 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 700 switch (packet[0]){ 701 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 702 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 703 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 704 break; 705 case SDP_EVENT_QUERY_COMPLETE: 706 if (channel_nr > 0){ 707 hsp_state = HSP_W4_RFCOMM_CONNECTED; 708 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 709 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 710 break; 711 } 712 hsp_ag_reset_state(); 713 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 714 if (sdp_event_query_complete_get_status(packet)){ 715 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 716 } else { 717 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 718 } 719 break; 720 default: 721 break; 722 } 723 } 724 725 726