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 "hci.h" 61 #include "hci_cmd.h" 62 #include "hci_dump.h" 63 #include "hsp_ag.h" 64 #include "l2cap.h" 65 66 #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" 67 #define HSP_HS_AT_CKPD "AT+CKPD\r\n" 68 #define HSP_AG_OK "\r\nOK\r\n" 69 #define HSP_AG_ERROR "\r\nERROR\r\n" 70 #define HSP_AG_RING "\r\nRING\r\n" 71 #define HSP_MICROPHONE_GAIN "+VGM" 72 #define HSP_SPEAKER_GAIN "+VGS" 73 74 #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" 75 #define HSP_HS_SPEAKER_GAIN "AT+VGS=" 76 77 static const char default_hsp_ag_service_name[] = "Audio Gateway"; 78 79 static bd_addr_t remote; 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 = HCI_CON_HANDLE_INVALID; 85 static uint16_t rfcomm_handle = HCI_CON_HANDLE_INVALID; 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 hsp_disconnect_rfcomm = 0; 96 static uint8_t hsp_establish_audio_connection = 0; 97 static uint8_t hsp_release_audio_connection = 0; 98 99 static btstack_packet_callback_registration_t hci_event_callback_registration; 100 101 typedef enum { 102 HSP_IDLE, 103 HSP_SDP_QUERY_RFCOMM_CHANNEL, 104 HSP_W4_SDP_EVENT_QUERY_COMPLETE, 105 HSP_W4_RFCOMM_CONNECTED, 106 107 HSP_RFCOMM_CONNECTION_ESTABLISHED, 108 109 HSP_W4_RING_ANSWER, 110 HSP_W4_USER_ACTION, 111 HSP_W2_CONNECT_SCO, 112 HSP_W4_SCO_CONNECTED, 113 114 HSP_AUDIO_CONNECTION_ESTABLISHED, 115 116 HSP_W2_DISCONNECT_SCO, 117 HSP_W4_SCO_DISCONNECTED, 118 119 HSP_W2_DISCONNECT_RFCOMM, 120 HSP_W4_RFCOMM_DISCONNECTED, 121 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 122 } hsp_state_t; 123 124 static hsp_state_t hsp_state = HSP_IDLE; 125 126 127 static btstack_packet_handler_t hsp_ag_callback; 128 129 static void hsp_run(void); 130 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 131 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 132 133 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 134 UNUSED(packet_type); // ok: no code 135 UNUSED(channel); // ok: no code 136 UNUSED(event); // ok: no code 137 UNUSED(size); // ok: no code 138 } 139 140 void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){ 141 if (callback == NULL){ 142 callback = &dummy_notify; 143 } 144 hsp_ag_callback = callback; 145 } 146 147 static void emit_event(uint8_t event_subtype, uint8_t value){ 148 if (!hsp_ag_callback) return; 149 uint8_t event[4]; 150 event[0] = HCI_EVENT_HSP_META; 151 event[1] = sizeof(event) - 2; 152 event[2] = event_subtype; 153 event[3] = value; // status 0 == OK 154 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 155 } 156 157 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 158 if (!hsp_ag_callback) return; 159 uint8_t event[6]; 160 event[0] = HCI_EVENT_HSP_META; 161 event[1] = sizeof(event) - 2; 162 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 163 event[3] = status; 164 little_endian_store_16(event, 4, handle); 165 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 166 } 167 168 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 169 uint8_t* attribute; 170 de_create_sequence(service); 171 172 // 0x0000 "Service Record Handle" 173 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 174 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 175 176 // 0x0001 "Service Class ID List" 177 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 178 attribute = de_push_sequence(service); 179 { 180 // "UUID for PAN Service" 181 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 182 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); 183 } 184 de_pop_sequence(service, attribute); 185 186 // 0x0004 "Protocol Descriptor List" 187 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 188 attribute = de_push_sequence(service); 189 { 190 uint8_t* l2cpProtocol = de_push_sequence(attribute); 191 { 192 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 193 } 194 de_pop_sequence(attribute, l2cpProtocol); 195 196 uint8_t* rfcomm = de_push_sequence(attribute); 197 { 198 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 199 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 200 } 201 de_pop_sequence(attribute, rfcomm); 202 } 203 de_pop_sequence(service, attribute); 204 205 // 0x0005 "Public Browse Group" 206 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 207 attribute = de_push_sequence(service); 208 { 209 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 210 } 211 de_pop_sequence(service, attribute); 212 213 // 0x0009 "Bluetooth Profile Descriptor List" 214 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 215 attribute = de_push_sequence(service); 216 { 217 uint8_t *sppProfile = de_push_sequence(attribute); 218 { 219 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 220 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 221 } 222 de_pop_sequence(attribute, sppProfile); 223 } 224 de_pop_sequence(service, attribute); 225 226 // 0x0100 "Service Name" 227 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 228 if (name){ 229 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 230 } else { 231 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 232 } 233 } 234 235 static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, const char * command){ 236 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 237 if (err){ 238 log_error("rfcomm_send_internal -> error 0X%02x", err); 239 return err; 240 } 241 return err; 242 } 243 244 void hsp_ag_enable_custom_commands(int enable){ 245 ag_support_custom_commands = enable; 246 } 247 248 int hsp_ag_send_result(char * result){ 249 if (!ag_support_custom_commands) return 1; 250 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 251 } 252 253 static void hsp_ag_reset_state(void){ 254 hsp_state = HSP_IDLE; 255 256 rfcomm_cid = 0; 257 rfcomm_handle = HCI_CON_HANDLE_INVALID; 258 sco_handle = 0; 259 260 ag_send_ok = 0; 261 ag_send_error = 0; 262 ag_ring = 0; 263 264 ag_num_button_press_received = 0; 265 ag_support_custom_commands = 0; 266 267 ag_microphone_gain = -1; 268 ag_speaker_gain = -1; 269 270 hsp_disconnect_rfcomm = 0; 271 hsp_establish_audio_connection = 0; 272 hsp_release_audio_connection = 0; 273 } 274 275 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 276 // register for HCI events 277 hci_event_callback_registration.callback = &packet_handler; 278 hci_add_event_handler(&hci_event_callback_registration); 279 280 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 281 282 hsp_ag_reset_state(); 283 } 284 285 void hsp_ag_connect(bd_addr_t bd_addr){ 286 if (hsp_state != HSP_IDLE) return; 287 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 288 (void)memcpy(remote, bd_addr, 6); 289 hsp_run(); 290 } 291 292 void hsp_ag_disconnect(void){ 293 hsp_ag_release_audio_connection(); 294 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 295 hsp_state = HSP_IDLE; 296 return; 297 } 298 299 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 300 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 301 return; 302 } 303 hsp_disconnect_rfcomm = 1; 304 hsp_run(); 305 } 306 307 void hsp_ag_establish_audio_connection(void){ 308 switch (hsp_state){ 309 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 310 hsp_establish_audio_connection = 1; 311 hsp_state = HSP_W4_SCO_CONNECTED; 312 break; 313 case HSP_W4_RFCOMM_CONNECTED: 314 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 315 break; 316 default: 317 break; 318 } 319 hsp_run(); 320 } 321 322 void hsp_ag_release_audio_connection(void){ 323 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 324 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 325 326 hsp_release_audio_connection = 1; 327 hsp_run(); 328 } 329 330 331 void hsp_ag_set_microphone_gain(uint8_t gain){ 332 if (gain >15) { 333 log_error("Gain must be in interval [0..15], it is given %d", gain); 334 return; 335 } 336 ag_microphone_gain = gain; 337 hsp_run(); 338 } 339 340 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 341 void hsp_ag_set_speaker_gain(uint8_t gain){ 342 if (gain >15) { 343 log_error("Gain must be in interval [0..15], it is given %d", gain); 344 return; 345 } 346 ag_speaker_gain = gain; 347 hsp_run(); 348 } 349 350 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 351 ag_ring = 1; 352 btstack_run_loop_set_timer(timer, 2000); // 2 seconds timeout 353 btstack_run_loop_add_timer(timer); 354 hsp_run(); 355 } 356 357 static void hsp_ringing_timer_start(void){ 358 btstack_run_loop_remove_timer(&hs_timeout); 359 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 360 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 361 btstack_run_loop_add_timer(&hs_timeout); 362 } 363 364 static void hsp_ringing_timer_stop(void){ 365 btstack_run_loop_remove_timer(&hs_timeout); 366 } 367 368 void hsp_ag_start_ringing(void){ 369 ag_ring = 1; 370 if (hsp_state == HSP_W2_CONNECT_SCO) { 371 hsp_state = HSP_W4_RING_ANSWER; 372 } 373 hsp_ringing_timer_start(); 374 } 375 376 void hsp_ag_stop_ringing(void){ 377 ag_ring = 0; 378 if (hsp_state == HSP_W4_RING_ANSWER){ 379 hsp_state = HSP_W2_CONNECT_SCO; 380 } 381 hsp_ringing_timer_stop(); 382 } 383 384 static void hsp_run(void){ 385 386 if (ag_send_ok){ 387 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 388 rfcomm_request_can_send_now_event(rfcomm_cid); 389 return; 390 } 391 ag_send_ok = 0; 392 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 393 return; 394 } 395 396 if (ag_send_error){ 397 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 398 rfcomm_request_can_send_now_event(rfcomm_cid); 399 return; 400 } 401 ag_send_error = 0; 402 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 403 return; 404 } 405 406 if (ag_ring){ 407 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 408 rfcomm_request_can_send_now_event(rfcomm_cid); 409 return; 410 } 411 ag_ring = 0; 412 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 413 return; 414 } 415 416 if (hsp_establish_audio_connection){ 417 if (!hci_can_send_command_packet_now()) return; 418 hsp_establish_audio_connection = 0; 419 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 420 return; 421 } 422 423 if (hsp_release_audio_connection){ 424 hsp_release_audio_connection = 0; 425 gap_disconnect(sco_handle); 426 return; 427 } 428 429 if (hsp_disconnect_rfcomm){ 430 hsp_disconnect_rfcomm = 0; 431 hsp_establish_audio_connection = 0; 432 rfcomm_disconnect(rfcomm_cid); 433 return; 434 } 435 436 switch (hsp_state){ 437 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 438 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 439 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET); 440 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET); 441 break; 442 443 case HSP_W4_RING_ANSWER: 444 if (!ag_num_button_press_received) break; 445 446 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 447 rfcomm_request_can_send_now_event(rfcomm_cid); 448 return; 449 } 450 451 ag_send_ok = 0; 452 ag_num_button_press_received = 0; 453 hsp_state = HSP_W2_CONNECT_SCO; 454 455 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 456 break; 457 458 case HSP_W2_CONNECT_SCO: 459 if (!hci_can_send_command_packet_now()) return; 460 hsp_state = HSP_W4_SCO_CONNECTED; 461 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 462 break; 463 464 case HSP_W2_DISCONNECT_SCO: 465 ag_num_button_press_received = 0; 466 467 hsp_state = HSP_W4_SCO_DISCONNECTED; 468 gap_disconnect(sco_handle); 469 break; 470 471 case HSP_W2_DISCONNECT_RFCOMM: 472 rfcomm_disconnect(rfcomm_cid); 473 break; 474 475 case HSP_AUDIO_CONNECTION_ESTABLISHED: 476 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 477 478 if (ag_microphone_gain >= 0){ 479 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 480 rfcomm_request_can_send_now_event(rfcomm_cid); 481 return; 482 } 483 int gain = ag_microphone_gain; 484 ag_microphone_gain = -1; 485 char buffer[10]; 486 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 487 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 488 break; 489 } 490 491 if (ag_speaker_gain >= 0){ 492 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 493 rfcomm_request_can_send_now_event(rfcomm_cid); 494 return; 495 } 496 int gain = ag_speaker_gain; 497 ag_speaker_gain = -1; 498 char buffer[10]; 499 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 500 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 501 break; 502 } 503 break; 504 default: 505 break; 506 } 507 } 508 509 510 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 511 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 512 513 if (packet_type == RFCOMM_DATA_PACKET){ 514 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 515 size--; 516 packet++; 517 } 518 519 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 520 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 521 ag_send_ok = 1; 522 switch (hsp_state){ 523 case HSP_AUDIO_CONNECTION_ESTABLISHED: 524 hsp_release_audio_connection = 1; 525 break; 526 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 527 hsp_establish_audio_connection = 1; 528 break; 529 default: 530 break; 531 } 532 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 533 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 534 ag_send_ok = 1; 535 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 536 537 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 538 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 539 ag_send_ok = 1; 540 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 541 542 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 543 ag_send_error = 1; 544 if (!hsp_ag_callback) return; 545 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 546 uint8_t * event = packet - 4; 547 event[0] = HCI_EVENT_HSP_META; 548 event[1] = size + 2; 549 event[2] = HSP_SUBEVENT_HS_COMMAND; 550 event[3] = size; 551 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 552 } 553 554 hsp_run(); 555 return; 556 } 557 558 if (packet_type != HCI_EVENT_PACKET) return; 559 uint8_t event = hci_event_packet_get_type(packet); 560 bd_addr_t event_addr; 561 uint16_t handle; 562 563 switch (event) { 564 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 565 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 566 if (status != 0){ 567 if (hsp_state == HSP_W4_SCO_CONNECTED){ 568 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 569 } 570 log_error("(e)SCO Connection failed, status %u", status); 571 emit_event_audio_connected(status, sco_handle); 572 break; 573 } 574 575 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 576 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 577 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 578 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 579 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 580 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 581 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 582 uint8_t air_mode = hci_event_synchronous_connection_complete_get_air_mode(packet); 583 584 switch (link_type){ 585 case 0x00: 586 log_info("SCO Connection established."); 587 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 588 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 589 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 590 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 591 break; 592 case 0x02: 593 log_info("eSCO Connection established."); 594 break; 595 default: 596 log_error("(e)SCO reserved link_type 0x%2x", link_type); 597 break; 598 } 599 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 600 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 601 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 602 603 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 604 hsp_state = HSP_W2_DISCONNECT_SCO; 605 break; 606 } 607 608 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 609 emit_event_audio_connected(status, sco_handle); 610 break; 611 } 612 613 case RFCOMM_EVENT_INCOMING_CONNECTION: 614 if (hsp_state != HSP_IDLE) return; 615 616 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 617 rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 618 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); 619 hsp_state = HSP_W4_RFCOMM_CONNECTED; 620 rfcomm_accept_connection(rfcomm_cid); 621 break; 622 623 case RFCOMM_EVENT_CHANNEL_OPENED: 624 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 625 if (rfcomm_event_channel_opened_get_status(packet)) { 626 log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet)); 627 hsp_ag_reset_state(); 628 hsp_state = HSP_IDLE; 629 } else { 630 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 631 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 632 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 633 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 634 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 635 } 636 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 637 break; 638 639 case RFCOMM_EVENT_CHANNEL_CLOSED: 640 hsp_ag_reset_state(); 641 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 642 break; 643 644 case RFCOMM_EVENT_CAN_SEND_NOW: 645 hsp_run(); 646 break; 647 648 case HCI_EVENT_DISCONNECTION_COMPLETE: 649 handle = little_endian_read_16(packet,3); 650 if (handle == sco_handle){ 651 sco_handle = HCI_CON_HANDLE_INVALID; 652 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 653 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 654 break; 655 } 656 break; 657 658 default: 659 break; 660 } 661 662 hsp_run(); 663 } 664 665 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 666 UNUSED(packet_type); // ok: handling own sdp events 667 UNUSED(channel); // ok: no channel 668 UNUSED(size); // ok: handling own sdp events 669 670 switch (packet[0]){ 671 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 672 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 673 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 674 break; 675 case SDP_EVENT_QUERY_COMPLETE: 676 if (channel_nr > 0){ 677 hsp_state = HSP_W4_RFCOMM_CONNECTED; 678 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 679 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 680 break; 681 } 682 hsp_ag_reset_state(); 683 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 684 if (sdp_event_query_complete_get_status(packet)){ 685 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 686 } else { 687 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 688 } 689 break; 690 default: 691 break; 692 } 693 } 694 695 696