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 "bluetooth_sdp.h" 54 #include "btstack_debug.h" 55 #include "btstack_event.h" 56 #include "btstack_memory.h" 57 #include "btstack_run_loop.h" 58 #include "classic/core.h" 59 #include "classic/sdp_server.h" 60 #include "classic/sdp_client_rfcomm.h" 61 #include "classic/sdp_util.h" 62 #include "hci.h" 63 #include "hci_cmd.h" 64 #include "hci_dump.h" 65 #include "hsp_ag.h" 66 #include "l2cap.h" 67 68 #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" 69 #define HSP_HS_AT_CKPD "AT+CKPD\r\n" 70 #define HSP_AG_OK "\r\nOK\r\n" 71 #define HSP_AG_ERROR "\r\nERROR\r\n" 72 #define HSP_AG_RING "\r\nRING\r\n" 73 #define HSP_MICROPHONE_GAIN "+VGM" 74 #define HSP_SPEAKER_GAIN "+VGS" 75 76 #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" 77 #define HSP_HS_SPEAKER_GAIN "AT+VGS=" 78 79 static const char default_hsp_ag_service_name[] = "Audio Gateway"; 80 81 static bd_addr_t remote; 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 = HCI_CON_HANDLE_INVALID; 87 static uint16_t rfcomm_handle = HCI_CON_HANDLE_INVALID; 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 hsp_disconnect_rfcomm = 0; 98 static uint8_t hsp_establish_audio_connection = 0; 99 static uint8_t hsp_release_audio_connection = 0; 100 101 static btstack_packet_callback_registration_t hci_event_callback_registration; 102 103 typedef enum { 104 HSP_IDLE, 105 HSP_SDP_QUERY_RFCOMM_CHANNEL, 106 HSP_W4_SDP_EVENT_QUERY_COMPLETE, 107 HSP_W4_RFCOMM_CONNECTED, 108 109 HSP_RFCOMM_CONNECTION_ESTABLISHED, 110 111 HSP_W4_RING_ANSWER, 112 HSP_W4_USER_ACTION, 113 HSP_W2_CONNECT_SCO, 114 HSP_W4_SCO_CONNECTED, 115 116 HSP_AUDIO_CONNECTION_ESTABLISHED, 117 118 HSP_W2_DISCONNECT_SCO, 119 HSP_W4_SCO_DISCONNECTED, 120 121 HSP_W2_DISCONNECT_RFCOMM, 122 HSP_W4_RFCOMM_DISCONNECTED, 123 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 124 } hsp_state_t; 125 126 static hsp_state_t hsp_state = HSP_IDLE; 127 128 129 static btstack_packet_handler_t hsp_ag_callback; 130 131 static void hsp_run(void); 132 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 133 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 134 135 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 136 UNUSED(packet_type); // ok: no code 137 UNUSED(channel); // ok: no code 138 UNUSED(event); // ok: no code 139 UNUSED(size); // ok: no code 140 } 141 142 void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){ 143 if (callback == NULL){ 144 callback = &dummy_notify; 145 } 146 hsp_ag_callback = callback; 147 } 148 149 static void emit_event(uint8_t event_subtype, uint8_t value){ 150 if (!hsp_ag_callback) return; 151 uint8_t event[4]; 152 event[0] = HCI_EVENT_HSP_META; 153 event[1] = sizeof(event) - 2; 154 event[2] = event_subtype; 155 event[3] = value; // status 0 == OK 156 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 157 } 158 159 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 160 if (!hsp_ag_callback) return; 161 uint8_t event[6]; 162 event[0] = HCI_EVENT_HSP_META; 163 event[1] = sizeof(event) - 2; 164 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 165 event[3] = status; 166 little_endian_store_16(event, 4, handle); 167 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 168 } 169 170 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 171 uint8_t* attribute; 172 de_create_sequence(service); 173 174 // 0x0000 "Service Record Handle" 175 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 176 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 177 178 // 0x0001 "Service Class ID List" 179 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 180 attribute = de_push_sequence(service); 181 { 182 // "UUID for PAN Service" 183 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 184 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); 185 } 186 de_pop_sequence(service, attribute); 187 188 // 0x0004 "Protocol Descriptor List" 189 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 190 attribute = de_push_sequence(service); 191 { 192 uint8_t* l2cpProtocol = de_push_sequence(attribute); 193 { 194 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 195 } 196 de_pop_sequence(attribute, l2cpProtocol); 197 198 uint8_t* rfcomm = de_push_sequence(attribute); 199 { 200 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 201 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 202 } 203 de_pop_sequence(attribute, rfcomm); 204 } 205 de_pop_sequence(service, attribute); 206 207 // 0x0005 "Public Browse Group" 208 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 209 attribute = de_push_sequence(service); 210 { 211 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 212 } 213 de_pop_sequence(service, attribute); 214 215 // 0x0009 "Bluetooth Profile Descriptor List" 216 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 217 attribute = de_push_sequence(service); 218 { 219 uint8_t *sppProfile = de_push_sequence(attribute); 220 { 221 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 222 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 223 } 224 de_pop_sequence(attribute, sppProfile); 225 } 226 de_pop_sequence(service, attribute); 227 228 // 0x0100 "Service Name" 229 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 230 if (name){ 231 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 232 } else { 233 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 234 } 235 } 236 237 static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, const char * command){ 238 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 239 if (err){ 240 log_error("rfcomm_send_internal -> error 0X%02x", err); 241 return err; 242 } 243 return err; 244 } 245 246 void hsp_ag_enable_custom_commands(int enable){ 247 ag_support_custom_commands = enable; 248 } 249 250 int hsp_ag_send_result(char * result){ 251 if (!ag_support_custom_commands) return 1; 252 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 253 } 254 255 static void hsp_ag_reset_state(void){ 256 hsp_state = HSP_IDLE; 257 258 rfcomm_cid = 0; 259 rfcomm_handle = HCI_CON_HANDLE_INVALID; 260 sco_handle = 0; 261 262 ag_send_ok = 0; 263 ag_send_error = 0; 264 ag_ring = 0; 265 266 ag_num_button_press_received = 0; 267 ag_support_custom_commands = 0; 268 269 ag_microphone_gain = -1; 270 ag_speaker_gain = -1; 271 272 hsp_disconnect_rfcomm = 0; 273 hsp_establish_audio_connection = 0; 274 hsp_release_audio_connection = 0; 275 } 276 277 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 278 // register for HCI events 279 hci_event_callback_registration.callback = &packet_handler; 280 hci_add_event_handler(&hci_event_callback_registration); 281 282 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 283 284 hsp_ag_reset_state(); 285 } 286 287 void hsp_ag_connect(bd_addr_t bd_addr){ 288 if (hsp_state != HSP_IDLE) return; 289 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 290 (void)memcpy(remote, bd_addr, 6); 291 hsp_run(); 292 } 293 294 void hsp_ag_disconnect(void){ 295 hsp_ag_release_audio_connection(); 296 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 297 hsp_state = HSP_IDLE; 298 return; 299 } 300 301 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 302 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 303 return; 304 } 305 hsp_disconnect_rfcomm = 1; 306 hsp_run(); 307 } 308 309 void hsp_ag_establish_audio_connection(void){ 310 switch (hsp_state){ 311 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 312 hsp_establish_audio_connection = 1; 313 hsp_state = HSP_W4_SCO_CONNECTED; 314 break; 315 case HSP_W4_RFCOMM_CONNECTED: 316 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 317 break; 318 default: 319 break; 320 } 321 hsp_run(); 322 } 323 324 void hsp_ag_release_audio_connection(void){ 325 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 326 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 327 328 hsp_release_audio_connection = 1; 329 hsp_run(); 330 } 331 332 333 void hsp_ag_set_microphone_gain(uint8_t gain){ 334 if (gain >15) { 335 log_error("Gain must be in interval [0..15], it is given %d", gain); 336 return; 337 } 338 ag_microphone_gain = gain; 339 hsp_run(); 340 } 341 342 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 343 void hsp_ag_set_speaker_gain(uint8_t gain){ 344 if (gain >15) { 345 log_error("Gain must be in interval [0..15], it is given %d", gain); 346 return; 347 } 348 ag_speaker_gain = gain; 349 hsp_run(); 350 } 351 352 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 353 ag_ring = 1; 354 btstack_run_loop_set_timer(timer, 2000); // 2 seconds timeout 355 btstack_run_loop_add_timer(timer); 356 hsp_run(); 357 } 358 359 static void hsp_ringing_timer_start(void){ 360 btstack_run_loop_remove_timer(&hs_timeout); 361 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 362 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 363 btstack_run_loop_add_timer(&hs_timeout); 364 } 365 366 static void hsp_ringing_timer_stop(void){ 367 btstack_run_loop_remove_timer(&hs_timeout); 368 } 369 370 void hsp_ag_start_ringing(void){ 371 ag_ring = 1; 372 if (hsp_state == HSP_W2_CONNECT_SCO) { 373 hsp_state = HSP_W4_RING_ANSWER; 374 } 375 hsp_ringing_timer_start(); 376 } 377 378 void hsp_ag_stop_ringing(void){ 379 ag_ring = 0; 380 if (hsp_state == HSP_W4_RING_ANSWER){ 381 hsp_state = HSP_W2_CONNECT_SCO; 382 } 383 hsp_ringing_timer_stop(); 384 } 385 386 static void hsp_run(void){ 387 388 if (ag_send_ok){ 389 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 390 rfcomm_request_can_send_now_event(rfcomm_cid); 391 return; 392 } 393 ag_send_ok = 0; 394 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 395 return; 396 } 397 398 if (ag_send_error){ 399 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 400 rfcomm_request_can_send_now_event(rfcomm_cid); 401 return; 402 } 403 ag_send_error = 0; 404 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 405 return; 406 } 407 408 if (ag_ring){ 409 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 410 rfcomm_request_can_send_now_event(rfcomm_cid); 411 return; 412 } 413 ag_ring = 0; 414 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 415 return; 416 } 417 418 if (hsp_establish_audio_connection){ 419 if (!hci_can_send_command_packet_now()) return; 420 hsp_establish_audio_connection = 0; 421 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 422 return; 423 } 424 425 if (hsp_release_audio_connection){ 426 hsp_release_audio_connection = 0; 427 gap_disconnect(sco_handle); 428 return; 429 } 430 431 if (hsp_disconnect_rfcomm){ 432 hsp_disconnect_rfcomm = 0; 433 hsp_establish_audio_connection = 0; 434 rfcomm_disconnect(rfcomm_cid); 435 return; 436 } 437 438 switch (hsp_state){ 439 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 440 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 441 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET); 442 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET); 443 break; 444 445 case HSP_W4_RING_ANSWER: 446 if (!ag_num_button_press_received) break; 447 448 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 449 rfcomm_request_can_send_now_event(rfcomm_cid); 450 return; 451 } 452 453 ag_send_ok = 0; 454 ag_num_button_press_received = 0; 455 hsp_state = HSP_W2_CONNECT_SCO; 456 457 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 458 break; 459 460 case HSP_W2_CONNECT_SCO: 461 if (!hci_can_send_command_packet_now()) return; 462 hsp_state = HSP_W4_SCO_CONNECTED; 463 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 464 break; 465 466 case HSP_W2_DISCONNECT_SCO: 467 ag_num_button_press_received = 0; 468 469 hsp_state = HSP_W4_SCO_DISCONNECTED; 470 gap_disconnect(sco_handle); 471 break; 472 473 case HSP_W2_DISCONNECT_RFCOMM: 474 rfcomm_disconnect(rfcomm_cid); 475 break; 476 477 case HSP_AUDIO_CONNECTION_ESTABLISHED: 478 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 479 480 if (ag_microphone_gain >= 0){ 481 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 482 rfcomm_request_can_send_now_event(rfcomm_cid); 483 return; 484 } 485 int gain = ag_microphone_gain; 486 ag_microphone_gain = -1; 487 char buffer[10]; 488 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 489 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 490 break; 491 } 492 493 if (ag_speaker_gain >= 0){ 494 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 495 rfcomm_request_can_send_now_event(rfcomm_cid); 496 return; 497 } 498 int gain = ag_speaker_gain; 499 ag_speaker_gain = -1; 500 char buffer[10]; 501 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 502 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 503 break; 504 } 505 break; 506 default: 507 break; 508 } 509 } 510 511 512 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 513 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 514 515 if (packet_type == RFCOMM_DATA_PACKET){ 516 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 517 size--; 518 packet++; 519 } 520 521 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 522 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 523 ag_send_ok = 1; 524 switch (hsp_state){ 525 case HSP_AUDIO_CONNECTION_ESTABLISHED: 526 hsp_release_audio_connection = 1; 527 break; 528 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 529 hsp_establish_audio_connection = 1; 530 break; 531 default: 532 break; 533 } 534 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 535 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 536 ag_send_ok = 1; 537 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 538 539 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 540 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 541 ag_send_ok = 1; 542 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 543 544 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 545 ag_send_error = 1; 546 if (!hsp_ag_callback) return; 547 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 548 uint8_t * event = packet - 4; 549 event[0] = HCI_EVENT_HSP_META; 550 event[1] = size + 2; 551 event[2] = HSP_SUBEVENT_HS_COMMAND; 552 event[3] = size; 553 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 554 } 555 556 hsp_run(); 557 return; 558 } 559 560 if (packet_type != HCI_EVENT_PACKET) return; 561 uint8_t event = hci_event_packet_get_type(packet); 562 bd_addr_t event_addr; 563 uint16_t handle; 564 565 switch (event) { 566 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 567 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 568 if (status != 0){ 569 log_error("(e)SCO Connection failed, status %u", status); 570 emit_event_audio_connected(status, sco_handle); 571 break; 572 } 573 574 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 575 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 576 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 577 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 578 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 579 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 580 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 581 uint8_t air_mode = hci_event_synchronous_connection_complete_get_air_mode(packet); 582 583 switch (link_type){ 584 case 0x00: 585 log_info("SCO Connection established."); 586 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 587 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 588 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 589 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 590 break; 591 case 0x02: 592 log_info("eSCO Connection established."); 593 break; 594 default: 595 log_error("(e)SCO reserved link_type 0x%2x", link_type); 596 break; 597 } 598 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 599 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 600 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 601 602 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 603 hsp_state = HSP_W2_DISCONNECT_SCO; 604 break; 605 } 606 607 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 608 emit_event_audio_connected(status, sco_handle); 609 break; 610 } 611 612 case RFCOMM_EVENT_INCOMING_CONNECTION: 613 if (hsp_state != HSP_IDLE) return; 614 615 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 616 rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 617 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); 618 hsp_state = HSP_W4_RFCOMM_CONNECTED; 619 rfcomm_accept_connection(rfcomm_cid); 620 break; 621 622 case RFCOMM_EVENT_CHANNEL_OPENED: 623 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 624 if (rfcomm_event_channel_opened_get_status(packet)) { 625 log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet)); 626 hsp_ag_reset_state(); 627 hsp_state = HSP_IDLE; 628 } else { 629 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 630 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 631 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 632 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 633 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 634 } 635 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 636 break; 637 638 case RFCOMM_EVENT_CHANNEL_CLOSED: 639 hsp_ag_reset_state(); 640 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 641 break; 642 643 case RFCOMM_EVENT_CAN_SEND_NOW: 644 hsp_run(); 645 break; 646 647 case HCI_EVENT_DISCONNECTION_COMPLETE: 648 handle = little_endian_read_16(packet,3); 649 if (handle == sco_handle){ 650 sco_handle = HCI_CON_HANDLE_INVALID; 651 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 652 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 653 break; 654 } 655 break; 656 657 default: 658 break; 659 } 660 661 hsp_run(); 662 } 663 664 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 665 UNUSED(packet_type); // ok: handling own sdp events 666 UNUSED(channel); // ok: no channel 667 UNUSED(size); // ok: handling own sdp events 668 669 switch (packet[0]){ 670 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 671 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 672 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 673 break; 674 case SDP_EVENT_QUERY_COMPLETE: 675 if (channel_nr > 0){ 676 hsp_state = HSP_W4_RFCOMM_CONNECTED; 677 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 678 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 679 break; 680 } 681 hsp_ag_reset_state(); 682 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 683 if (sdp_event_query_complete_get_status(packet)){ 684 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 685 } else { 686 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 687 } 688 break; 689 default: 690 break; 691 } 692 } 693 694 695