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 <string.h> 50 51 #include "bluetooth_sdp.h" 52 #include "btstack_debug.h" 53 #include "btstack_event.h" 54 #include "btstack_memory.h" 55 #include "btstack_run_loop.h" 56 #include "classic/core.h" 57 #include "classic/sdp_server.h" 58 #include "classic/sdp_client_rfcomm.h" 59 #include "classic/sdp_util.h" 60 #include "classic/sdp_client.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 uint8_t channel_nr = 0; 82 83 static uint16_t mtu; 84 static uint16_t rfcomm_cid = 0; 85 static uint16_t sco_handle = HCI_CON_HANDLE_INVALID; 86 static uint16_t rfcomm_handle = HCI_CON_HANDLE_INVALID; 87 static btstack_timer_source_t hs_timeout; 88 89 static int ag_microphone_gain = -1; 90 static int ag_speaker_gain = -1; 91 static uint8_t ag_ring = 0; 92 static uint8_t ag_send_ok = 0; 93 static uint8_t ag_send_error = 0; 94 static uint8_t ag_num_button_press_received = 0; 95 static uint8_t ag_support_custom_commands = 0; 96 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_W2_SEND_SDP_QUERY, 105 HSP_W4_SDP_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 static btstack_context_callback_registration_t hsp_ag_handle_sdp_client_query_request; 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); // ok: no code 136 UNUSED(channel); // ok: no code 137 UNUSED(event); // ok: no code 138 UNUSED(size); // ok: no code 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, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 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, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 179 attribute = de_push_sequence(service); 180 { 181 // "UUID for PAN Service" 182 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 183 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); 184 } 185 de_pop_sequence(service, attribute); 186 187 // 0x0004 "Protocol Descriptor List" 188 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 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, BLUETOOTH_PROTOCOL_L2CAP); 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, BLUETOOTH_PROTOCOL_RFCOMM); // 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, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 208 attribute = de_push_sequence(service); 209 { 210 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 211 } 212 de_pop_sequence(service, attribute); 213 214 // 0x0009 "Bluetooth Profile Descriptor List" 215 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 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, BLUETOOTH_SERVICE_CLASS_HEADSET); 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, const 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 = HCI_CON_HANDLE_INVALID; 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 static void hsp_ag_handle_start_sdp_client_query(void * context){ 287 UNUSED(context); 288 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 289 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET); 290 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET); 291 } 292 293 void hsp_ag_connect(bd_addr_t bd_addr){ 294 if (hsp_state != HSP_IDLE) return; 295 296 (void)memcpy(remote, bd_addr, 6); 297 hsp_state = HSP_W2_SEND_SDP_QUERY; 298 hsp_ag_handle_sdp_client_query_request.callback = &hsp_ag_handle_start_sdp_client_query; 299 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 300 (void) sdp_client_register_query_callback(&hsp_ag_handle_sdp_client_query_request); 301 } 302 303 void hsp_ag_disconnect(void){ 304 hsp_ag_release_audio_connection(); 305 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 306 hsp_state = HSP_IDLE; 307 return; 308 } 309 310 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 311 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 312 return; 313 } 314 hsp_disconnect_rfcomm = 1; 315 hsp_run(); 316 } 317 318 void hsp_ag_establish_audio_connection(void){ 319 switch (hsp_state){ 320 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 321 hsp_establish_audio_connection = 1; 322 hsp_state = HSP_W4_SCO_CONNECTED; 323 break; 324 case HSP_W4_RFCOMM_CONNECTED: 325 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 326 break; 327 default: 328 break; 329 } 330 hsp_run(); 331 } 332 333 void hsp_ag_release_audio_connection(void){ 334 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 335 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 336 337 hsp_release_audio_connection = 1; 338 hsp_run(); 339 } 340 341 342 void hsp_ag_set_microphone_gain(uint8_t gain){ 343 if (gain >15) { 344 log_error("Gain must be in interval [0..15], it is given %d", gain); 345 return; 346 } 347 ag_microphone_gain = gain; 348 hsp_run(); 349 } 350 351 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 352 void hsp_ag_set_speaker_gain(uint8_t gain){ 353 if (gain >15) { 354 log_error("Gain must be in interval [0..15], it is given %d", gain); 355 return; 356 } 357 ag_speaker_gain = gain; 358 hsp_run(); 359 } 360 361 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 362 ag_ring = 1; 363 btstack_run_loop_set_timer(timer, 2000); // 2 seconds timeout 364 btstack_run_loop_add_timer(timer); 365 hsp_run(); 366 } 367 368 static void hsp_ringing_timer_start(void){ 369 btstack_run_loop_remove_timer(&hs_timeout); 370 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 371 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 372 btstack_run_loop_add_timer(&hs_timeout); 373 } 374 375 static void hsp_ringing_timer_stop(void){ 376 btstack_run_loop_remove_timer(&hs_timeout); 377 } 378 379 void hsp_ag_start_ringing(void){ 380 ag_ring = 1; 381 if (hsp_state == HSP_W2_CONNECT_SCO) { 382 hsp_state = HSP_W4_RING_ANSWER; 383 } 384 hsp_ringing_timer_start(); 385 } 386 387 void hsp_ag_stop_ringing(void){ 388 ag_ring = 0; 389 if (hsp_state == HSP_W4_RING_ANSWER){ 390 hsp_state = HSP_W2_CONNECT_SCO; 391 } 392 hsp_ringing_timer_stop(); 393 } 394 395 static void hsp_run(void){ 396 397 if (ag_send_ok){ 398 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 399 rfcomm_request_can_send_now_event(rfcomm_cid); 400 return; 401 } 402 ag_send_ok = 0; 403 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 404 return; 405 } 406 407 if (ag_send_error){ 408 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 409 rfcomm_request_can_send_now_event(rfcomm_cid); 410 return; 411 } 412 ag_send_error = 0; 413 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 414 return; 415 } 416 417 if (ag_ring){ 418 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 419 rfcomm_request_can_send_now_event(rfcomm_cid); 420 return; 421 } 422 ag_ring = 0; 423 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 424 return; 425 } 426 427 if (hsp_establish_audio_connection){ 428 if (!hci_can_send_command_packet_now()) return; 429 hsp_establish_audio_connection = 0; 430 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 431 return; 432 } 433 434 if (hsp_release_audio_connection){ 435 hsp_release_audio_connection = 0; 436 gap_disconnect(sco_handle); 437 return; 438 } 439 440 if (hsp_disconnect_rfcomm){ 441 hsp_disconnect_rfcomm = 0; 442 hsp_establish_audio_connection = 0; 443 rfcomm_disconnect(rfcomm_cid); 444 return; 445 } 446 447 switch (hsp_state){ 448 449 case HSP_W4_RING_ANSWER: 450 if (!ag_num_button_press_received) break; 451 452 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 453 rfcomm_request_can_send_now_event(rfcomm_cid); 454 return; 455 } 456 457 ag_send_ok = 0; 458 ag_num_button_press_received = 0; 459 hsp_state = HSP_W2_CONNECT_SCO; 460 461 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 462 break; 463 464 case HSP_W2_CONNECT_SCO: 465 if (!hci_can_send_command_packet_now()) return; 466 hsp_state = HSP_W4_SCO_CONNECTED; 467 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 468 break; 469 470 case HSP_W2_DISCONNECT_SCO: 471 ag_num_button_press_received = 0; 472 473 hsp_state = HSP_W4_SCO_DISCONNECTED; 474 gap_disconnect(sco_handle); 475 break; 476 477 case HSP_W2_DISCONNECT_RFCOMM: 478 rfcomm_disconnect(rfcomm_cid); 479 break; 480 481 case HSP_AUDIO_CONNECTION_ESTABLISHED: 482 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 483 484 if (ag_microphone_gain >= 0){ 485 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 486 rfcomm_request_can_send_now_event(rfcomm_cid); 487 return; 488 } 489 int gain = ag_microphone_gain; 490 ag_microphone_gain = -1; 491 char buffer[10]; 492 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 493 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 494 break; 495 } 496 497 if (ag_speaker_gain >= 0){ 498 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 499 rfcomm_request_can_send_now_event(rfcomm_cid); 500 return; 501 } 502 int gain = ag_speaker_gain; 503 ag_speaker_gain = -1; 504 char buffer[10]; 505 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 506 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 507 break; 508 } 509 break; 510 default: 511 break; 512 } 513 } 514 515 516 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 517 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 518 519 if (packet_type == RFCOMM_DATA_PACKET){ 520 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 521 size--; 522 packet++; 523 } 524 525 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 526 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 527 ag_send_ok = 1; 528 switch (hsp_state){ 529 case HSP_AUDIO_CONNECTION_ESTABLISHED: 530 hsp_release_audio_connection = 1; 531 break; 532 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 533 hsp_establish_audio_connection = 1; 534 break; 535 default: 536 break; 537 } 538 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 539 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 540 ag_send_ok = 1; 541 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 542 543 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 544 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 545 ag_send_ok = 1; 546 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 547 548 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 549 ag_send_error = 1; 550 if (!hsp_ag_callback) return; 551 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 552 uint8_t * event = packet - 4; 553 event[0] = HCI_EVENT_HSP_META; 554 event[1] = size + 2; 555 event[2] = HSP_SUBEVENT_HS_COMMAND; 556 event[3] = size; 557 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 558 } 559 560 hsp_run(); 561 return; 562 } 563 564 if (packet_type != HCI_EVENT_PACKET) return; 565 uint8_t event = hci_event_packet_get_type(packet); 566 bd_addr_t event_addr; 567 uint16_t handle; 568 569 switch (event) { 570 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 571 if (hsp_state != HSP_W4_SCO_CONNECTED) break; 572 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 573 if (status != 0){ 574 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 575 log_error("(e)SCO Connection failed, status %u", status); 576 emit_event_audio_connected(status, sco_handle); 577 break; 578 } 579 580 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 581 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 582 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 583 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 584 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 585 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 586 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 587 uint8_t air_mode = hci_event_synchronous_connection_complete_get_air_mode(packet); 588 589 switch (link_type){ 590 case 0x00: 591 log_info("SCO Connection established."); 592 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 593 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 594 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 595 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 596 break; 597 case 0x02: 598 log_info("eSCO Connection established."); 599 break; 600 default: 601 log_error("(e)SCO reserved link_type 0x%2x", link_type); 602 break; 603 } 604 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 605 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 606 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 607 608 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 609 hsp_state = HSP_W2_DISCONNECT_SCO; 610 break; 611 } 612 613 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 614 emit_event_audio_connected(status, sco_handle); 615 break; 616 } 617 618 case RFCOMM_EVENT_INCOMING_CONNECTION: 619 if (hsp_state != HSP_IDLE) return; 620 621 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 622 rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 623 log_info("RFCOMM channel %u requested for %s with cid 0x%04x", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr), rfcomm_cid); 624 hsp_state = HSP_W4_RFCOMM_CONNECTED; 625 rfcomm_accept_connection(rfcomm_cid); 626 break; 627 628 case RFCOMM_EVENT_CHANNEL_OPENED: 629 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 630 if (rfcomm_event_channel_opened_get_status(packet)) { 631 log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet)); 632 hsp_ag_reset_state(); 633 hsp_state = HSP_IDLE; 634 } else { 635 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 636 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 637 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 638 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 639 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 640 } 641 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 642 break; 643 644 case RFCOMM_EVENT_CHANNEL_CLOSED: 645 hsp_ag_reset_state(); 646 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 647 break; 648 649 case RFCOMM_EVENT_CAN_SEND_NOW: 650 hsp_run(); 651 break; 652 653 case HCI_EVENT_DISCONNECTION_COMPLETE: 654 handle = little_endian_read_16(packet,3); 655 if (handle == sco_handle){ 656 sco_handle = HCI_CON_HANDLE_INVALID; 657 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 658 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 659 break; 660 } 661 break; 662 663 default: 664 break; 665 } 666 667 hsp_run(); 668 } 669 670 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 671 UNUSED(packet_type); // ok: handling own sdp events 672 UNUSED(channel); // ok: no channel 673 UNUSED(size); // ok: handling own sdp events 674 675 switch (packet[0]){ 676 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 677 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 678 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 679 break; 680 case SDP_EVENT_QUERY_COMPLETE: 681 if (channel_nr > 0){ 682 hsp_state = HSP_W4_RFCOMM_CONNECTED; 683 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 684 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 685 break; 686 } 687 hsp_ag_reset_state(); 688 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 689 if (sdp_event_query_complete_get_status(packet)){ 690 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 691 } else { 692 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 693 } 694 break; 695 default: 696 break; 697 } 698 } 699 700 701