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 <string.h> 51 52 #include "bluetooth_sdp.h" 53 #include "btstack_debug.h" 54 #include "btstack_event.h" 55 #include "btstack_memory.h" 56 #include "btstack_run_loop.h" 57 #include "classic/core.h" 58 #include "classic/sdp_server.h" 59 #include "classic/sdp_client_rfcomm.h" 60 #include "classic/sdp_util.h" 61 #include "classic/sdp_client.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; 83 84 static uint16_t mtu; 85 static uint16_t rfcomm_cid; 86 static hci_con_handle_t sco_handle; 87 static hci_con_handle_t rfcomm_handle; 88 static btstack_timer_source_t hs_timeout; 89 90 static int ag_microphone_gain; 91 static int ag_speaker_gain; 92 static uint8_t ag_ring; 93 static uint8_t ag_send_ok; 94 static uint8_t ag_send_error; 95 static uint8_t ag_support_custom_commands; 96 static uint8_t hsp_disconnect_rfcomm; 97 static uint8_t hsp_release_audio_connection; 98 99 static uint16_t hsp_ag_sco_packet_types; 100 101 static btstack_packet_callback_registration_t hci_event_callback_registration; 102 103 typedef enum { 104 HSP_IDLE, 105 HSP_W2_SEND_SDP_QUERY, 106 HSP_W4_SDP_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; 127 128 static btstack_context_callback_registration_t hsp_ag_handle_sdp_client_query_request; 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 channel_nr = 0; 261 sco_handle = HCI_CON_HANDLE_INVALID; 262 263 ag_send_ok = 0; 264 ag_send_error = 0; 265 ag_ring = 0; 266 267 ag_support_custom_commands = 0; 268 269 ag_microphone_gain = -1; 270 ag_speaker_gain = -1; 271 272 hsp_disconnect_rfcomm = 0; 273 hsp_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_sco_packet_types = SCO_PACKET_TYPES_ALL; 284 hsp_ag_reset_state(); 285 } 286 287 void hsp_ag_deinit(void){ 288 (void)memset(remote, 0, 6); 289 (void)memset(&hs_timeout, 0, sizeof(btstack_timer_source_t)); 290 (void)memset(&hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 291 (void)memset(&hsp_ag_handle_sdp_client_query_request, 0, sizeof(btstack_context_callback_registration_t)); 292 hsp_ag_callback = NULL; 293 } 294 295 static void hsp_ag_handle_start_sdp_client_query(void * context){ 296 UNUSED(context); 297 if (hsp_state != HSP_W2_SEND_SDP_QUERY) return; 298 299 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 300 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET); 301 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET); 302 } 303 304 void hsp_ag_connect(bd_addr_t bd_addr){ 305 if (hsp_state != HSP_IDLE) return; 306 307 (void)memcpy(remote, bd_addr, 6); 308 hsp_state = HSP_W2_SEND_SDP_QUERY; 309 hsp_ag_handle_sdp_client_query_request.callback = &hsp_ag_handle_start_sdp_client_query; 310 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 311 (void) sdp_client_register_query_callback(&hsp_ag_handle_sdp_client_query_request); 312 } 313 314 void hsp_ag_disconnect(void){ 315 hsp_ag_release_audio_connection(); 316 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 317 hsp_state = HSP_IDLE; 318 return; 319 } 320 321 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 322 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 323 return; 324 } 325 hsp_disconnect_rfcomm = 1; 326 hsp_run(); 327 } 328 329 void hsp_ag_establish_audio_connection(void){ 330 switch (hsp_state){ 331 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 332 hsp_state = HSP_W2_CONNECT_SCO; 333 break; 334 case HSP_W4_RFCOMM_CONNECTED: 335 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 336 break; 337 default: 338 break; 339 } 340 hsp_run(); 341 } 342 343 void hsp_ag_release_audio_connection(void){ 344 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 345 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 346 347 hsp_release_audio_connection = 1; 348 hsp_run(); 349 } 350 351 352 void hsp_ag_set_microphone_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_microphone_gain = gain; 358 hsp_run(); 359 } 360 361 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 362 void hsp_ag_set_speaker_gain(uint8_t gain){ 363 if (gain >15) { 364 log_error("Gain must be in interval [0..15], it is given %d", gain); 365 return; 366 } 367 ag_speaker_gain = gain; 368 hsp_run(); 369 } 370 371 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 372 ag_ring = 1; 373 btstack_run_loop_set_timer(timer, 2000); // 2 seconds timeout 374 btstack_run_loop_add_timer(timer); 375 hsp_run(); 376 } 377 378 static void hsp_ringing_timer_start(void){ 379 btstack_run_loop_remove_timer(&hs_timeout); 380 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 381 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 382 btstack_run_loop_add_timer(&hs_timeout); 383 } 384 385 static void hsp_ringing_timer_stop(void){ 386 btstack_run_loop_remove_timer(&hs_timeout); 387 } 388 389 void hsp_ag_start_ringing(void){ 390 ag_ring = 1; 391 if (hsp_state == HSP_W2_CONNECT_SCO) { 392 hsp_state = HSP_W4_RING_ANSWER; 393 } 394 hsp_ringing_timer_start(); 395 } 396 397 void hsp_ag_stop_ringing(void){ 398 ag_ring = 0; 399 if (hsp_state == HSP_W4_RING_ANSWER){ 400 hsp_state = HSP_W2_CONNECT_SCO; 401 } 402 hsp_ringing_timer_stop(); 403 } 404 405 static void hsp_run(void){ 406 uint16_t packet_types; 407 408 if (ag_send_ok){ 409 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 410 rfcomm_request_can_send_now_event(rfcomm_cid); 411 return; 412 } 413 ag_send_ok = 0; 414 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 415 return; 416 } 417 418 if (ag_send_error){ 419 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 420 rfcomm_request_can_send_now_event(rfcomm_cid); 421 return; 422 } 423 ag_send_error = 0; 424 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 425 return; 426 } 427 428 if (ag_ring){ 429 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 430 rfcomm_request_can_send_now_event(rfcomm_cid); 431 return; 432 } 433 ag_ring = 0; 434 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 435 return; 436 } 437 438 if (hsp_release_audio_connection){ 439 hsp_release_audio_connection = 0; 440 gap_disconnect(sco_handle); 441 return; 442 } 443 444 if (hsp_disconnect_rfcomm){ 445 hsp_disconnect_rfcomm = 0; 446 rfcomm_disconnect(rfcomm_cid); 447 return; 448 } 449 450 switch (hsp_state){ 451 452 case HSP_W4_RING_ANSWER: 453 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 454 rfcomm_request_can_send_now_event(rfcomm_cid); 455 return; 456 } 457 458 ag_send_ok = 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 // bits 6-9 are 'don't use' 468 packet_types = hsp_ag_sco_packet_types ^ 0x3c0; 469 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, packet_types); 470 break; 471 472 case HSP_W2_DISCONNECT_SCO: 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[12]; 492 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 493 HSP_MICROPHONE_GAIN, gain); 494 buffer[sizeof(buffer) - 1] = 0; 495 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 496 break; 497 } 498 499 if (ag_speaker_gain >= 0){ 500 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 501 rfcomm_request_can_send_now_event(rfcomm_cid); 502 return; 503 } 504 int gain = ag_speaker_gain; 505 ag_speaker_gain = -1; 506 char buffer[12]; 507 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 508 HSP_SPEAKER_GAIN, gain); 509 buffer[sizeof(buffer) - 1] = 0; 510 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 511 break; 512 } 513 break; 514 default: 515 break; 516 } 517 } 518 519 520 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 521 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 522 523 if (packet_type == RFCOMM_DATA_PACKET){ 524 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 525 size--; 526 packet++; 527 } 528 529 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 530 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 531 ag_send_ok = 1; 532 emit_event(HSP_SUBEVENT_BUTTON_PRESSED, 0); 533 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 534 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 535 ag_send_ok = 1; 536 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 537 538 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 539 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 540 ag_send_ok = 1; 541 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 542 543 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 544 ag_send_error = 1; 545 if (!hsp_ag_callback) return; 546 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 547 uint8_t * event = packet - 4; 548 event[0] = HCI_EVENT_HSP_META; 549 event[1] = size + 2; 550 event[2] = HSP_SUBEVENT_HS_COMMAND; 551 event[3] = size; 552 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 553 } 554 555 hsp_run(); 556 return; 557 } 558 559 if (packet_type != HCI_EVENT_PACKET) return; 560 uint8_t event = hci_event_packet_get_type(packet); 561 bd_addr_t event_addr; 562 uint16_t handle; 563 564 switch (event) { 565 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 566 if (hsp_state != HSP_W4_SCO_CONNECTED) break; 567 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 568 if (status != 0){ 569 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 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 582 583 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, 601 hci_event_synchronous_connection_complete_get_air_mode(packet)); 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 void hsp_ag_set_sco_packet_types(uint16_t packet_types){ 696 hsp_ag_sco_packet_types = packet_types; 697 } 698 699