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; 82 83 static uint16_t mtu; 84 static uint16_t rfcomm_cid; 85 static hci_con_handle_t sco_handle; 86 static hci_con_handle_t rfcomm_handle; 87 static btstack_timer_source_t hs_timeout; 88 89 static int ag_microphone_gain; 90 static int ag_speaker_gain; 91 static uint8_t ag_ring; 92 static uint8_t ag_send_ok; 93 static uint8_t ag_send_error; 94 static uint8_t ag_support_custom_commands; 95 static uint8_t hsp_disconnect_rfcomm; 96 static uint8_t hsp_release_audio_connection; 97 98 static uint16_t hsp_ag_sco_packet_types; 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; 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 channel_nr = 0; 260 sco_handle = HCI_CON_HANDLE_INVALID; 261 262 ag_send_ok = 0; 263 ag_send_error = 0; 264 ag_ring = 0; 265 266 ag_support_custom_commands = 0; 267 268 ag_microphone_gain = -1; 269 ag_speaker_gain = -1; 270 271 hsp_disconnect_rfcomm = 0; 272 hsp_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_sco_packet_types = SCO_PACKET_TYPES_ALL; 283 hsp_ag_reset_state(); 284 } 285 286 void hsp_ag_deinit(void){ 287 (void)memset(remote, 0, 6); 288 (void)memset(&hs_timeout, 0, sizeof(btstack_timer_source_t)); 289 (void)memset(&hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 290 (void)memset(&hsp_ag_handle_sdp_client_query_request, 0, sizeof(btstack_context_callback_registration_t)); 291 hsp_ag_callback = NULL; 292 } 293 294 static void hsp_ag_handle_start_sdp_client_query(void * context){ 295 UNUSED(context); 296 if (hsp_state != HSP_W2_SEND_SDP_QUERY) return; 297 298 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 299 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET); 300 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET); 301 } 302 303 void hsp_ag_connect(bd_addr_t bd_addr){ 304 if (hsp_state != HSP_IDLE) return; 305 306 (void)memcpy(remote, bd_addr, 6); 307 hsp_state = HSP_W2_SEND_SDP_QUERY; 308 hsp_ag_handle_sdp_client_query_request.callback = &hsp_ag_handle_start_sdp_client_query; 309 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 310 (void) sdp_client_register_query_callback(&hsp_ag_handle_sdp_client_query_request); 311 } 312 313 void hsp_ag_disconnect(void){ 314 hsp_ag_release_audio_connection(); 315 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 316 hsp_state = HSP_IDLE; 317 return; 318 } 319 320 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 321 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 322 return; 323 } 324 hsp_disconnect_rfcomm = 1; 325 hsp_run(); 326 } 327 328 void hsp_ag_establish_audio_connection(void){ 329 switch (hsp_state){ 330 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 331 hsp_state = HSP_W2_CONNECT_SCO; 332 break; 333 case HSP_W4_RFCOMM_CONNECTED: 334 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 335 break; 336 default: 337 break; 338 } 339 hsp_run(); 340 } 341 342 void hsp_ag_release_audio_connection(void){ 343 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 344 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 345 346 hsp_release_audio_connection = 1; 347 hsp_run(); 348 } 349 350 351 void hsp_ag_set_microphone_gain(uint8_t gain){ 352 if (gain >15) { 353 log_error("Gain must be in interval [0..15], it is given %d", gain); 354 return; 355 } 356 ag_microphone_gain = gain; 357 hsp_run(); 358 } 359 360 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 361 void hsp_ag_set_speaker_gain(uint8_t gain){ 362 if (gain >15) { 363 log_error("Gain must be in interval [0..15], it is given %d", gain); 364 return; 365 } 366 ag_speaker_gain = gain; 367 hsp_run(); 368 } 369 370 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 371 ag_ring = 1; 372 btstack_run_loop_set_timer(timer, 2000); // 2 seconds timeout 373 btstack_run_loop_add_timer(timer); 374 hsp_run(); 375 } 376 377 static void hsp_ringing_timer_start(void){ 378 btstack_run_loop_remove_timer(&hs_timeout); 379 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 380 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 381 btstack_run_loop_add_timer(&hs_timeout); 382 } 383 384 static void hsp_ringing_timer_stop(void){ 385 btstack_run_loop_remove_timer(&hs_timeout); 386 } 387 388 void hsp_ag_start_ringing(void){ 389 ag_ring = 1; 390 if (hsp_state == HSP_W2_CONNECT_SCO) { 391 hsp_state = HSP_W4_RING_ANSWER; 392 } 393 hsp_ringing_timer_start(); 394 } 395 396 void hsp_ag_stop_ringing(void){ 397 ag_ring = 0; 398 if (hsp_state == HSP_W4_RING_ANSWER){ 399 hsp_state = HSP_W2_CONNECT_SCO; 400 } 401 hsp_ringing_timer_stop(); 402 } 403 404 static void hsp_run(void){ 405 uint16_t packet_types; 406 407 if (ag_send_ok){ 408 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 409 rfcomm_request_can_send_now_event(rfcomm_cid); 410 return; 411 } 412 ag_send_ok = 0; 413 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 414 return; 415 } 416 417 if (ag_send_error){ 418 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 419 rfcomm_request_can_send_now_event(rfcomm_cid); 420 return; 421 } 422 ag_send_error = 0; 423 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 424 return; 425 } 426 427 if (ag_ring){ 428 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 429 rfcomm_request_can_send_now_event(rfcomm_cid); 430 return; 431 } 432 ag_ring = 0; 433 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 434 return; 435 } 436 437 if (hsp_release_audio_connection){ 438 hsp_release_audio_connection = 0; 439 gap_disconnect(sco_handle); 440 return; 441 } 442 443 if (hsp_disconnect_rfcomm){ 444 hsp_disconnect_rfcomm = 0; 445 rfcomm_disconnect(rfcomm_cid); 446 return; 447 } 448 449 switch (hsp_state){ 450 451 case HSP_W4_RING_ANSWER: 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 hsp_state = HSP_W2_CONNECT_SCO; 459 460 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 461 break; 462 463 case HSP_W2_CONNECT_SCO: 464 if (!hci_can_send_command_packet_now()) return; 465 hsp_state = HSP_W4_SCO_CONNECTED; 466 // bits 6-9 are 'don't use' 467 packet_types = hsp_ag_sco_packet_types ^ 0x3c0; 468 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, packet_types); 469 break; 470 471 case HSP_W2_DISCONNECT_SCO: 472 hsp_state = HSP_W4_SCO_DISCONNECTED; 473 gap_disconnect(sco_handle); 474 break; 475 476 case HSP_W2_DISCONNECT_RFCOMM: 477 rfcomm_disconnect(rfcomm_cid); 478 break; 479 480 case HSP_AUDIO_CONNECTION_ESTABLISHED: 481 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 482 483 if (ag_microphone_gain >= 0){ 484 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 485 rfcomm_request_can_send_now_event(rfcomm_cid); 486 return; 487 } 488 int gain = ag_microphone_gain; 489 ag_microphone_gain = -1; 490 char buffer[10]; 491 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 492 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 493 break; 494 } 495 496 if (ag_speaker_gain >= 0){ 497 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 498 rfcomm_request_can_send_now_event(rfcomm_cid); 499 return; 500 } 501 int gain = ag_speaker_gain; 502 ag_speaker_gain = -1; 503 char buffer[10]; 504 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 505 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 506 break; 507 } 508 break; 509 default: 510 break; 511 } 512 } 513 514 515 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 516 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 517 518 if (packet_type == RFCOMM_DATA_PACKET){ 519 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 520 size--; 521 packet++; 522 } 523 524 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 525 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 526 ag_send_ok = 1; 527 switch (hsp_state){ 528 case HSP_AUDIO_CONNECTION_ESTABLISHED: 529 hsp_release_audio_connection = 1; 530 break; 531 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 532 hsp_state = HSP_W2_CONNECT_SCO; 533 break; 534 default: 535 break; 536 } 537 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 538 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 539 ag_send_ok = 1; 540 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 541 542 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 543 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 544 ag_send_ok = 1; 545 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 546 547 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 548 ag_send_error = 1; 549 if (!hsp_ag_callback) return; 550 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 551 uint8_t * event = packet - 4; 552 event[0] = HCI_EVENT_HSP_META; 553 event[1] = size + 2; 554 event[2] = HSP_SUBEVENT_HS_COMMAND; 555 event[3] = size; 556 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 557 } 558 559 hsp_run(); 560 return; 561 } 562 563 if (packet_type != HCI_EVENT_PACKET) return; 564 uint8_t event = hci_event_packet_get_type(packet); 565 bd_addr_t event_addr; 566 uint16_t handle; 567 568 switch (event) { 569 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 570 if (hsp_state != HSP_W4_SCO_CONNECTED) break; 571 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 572 if (status != 0){ 573 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 574 log_error("(e)SCO Connection failed, status %u", status); 575 emit_event_audio_connected(status, sco_handle); 576 break; 577 } 578 579 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 580 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 581 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 582 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 583 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 584 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 585 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 586 587 switch (link_type){ 588 case 0x00: 589 log_info("SCO Connection established."); 590 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 591 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 592 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 593 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 594 break; 595 case 0x02: 596 log_info("eSCO Connection established."); 597 break; 598 default: 599 log_error("(e)SCO reserved link_type 0x%2x", link_type); 600 break; 601 } 602 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 603 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 604 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, 605 hci_event_synchronous_connection_complete_get_air_mode(packet)); 606 607 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 608 hsp_state = HSP_W2_DISCONNECT_SCO; 609 break; 610 } 611 612 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 613 emit_event_audio_connected(status, sco_handle); 614 break; 615 } 616 617 case RFCOMM_EVENT_INCOMING_CONNECTION: 618 if (hsp_state != HSP_IDLE) return; 619 620 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 621 rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 622 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); 623 hsp_state = HSP_W4_RFCOMM_CONNECTED; 624 rfcomm_accept_connection(rfcomm_cid); 625 break; 626 627 case RFCOMM_EVENT_CHANNEL_OPENED: 628 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 629 if (rfcomm_event_channel_opened_get_status(packet)) { 630 log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet)); 631 hsp_ag_reset_state(); 632 hsp_state = HSP_IDLE; 633 } else { 634 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 635 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 636 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 637 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 638 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 639 } 640 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 641 break; 642 643 case RFCOMM_EVENT_CHANNEL_CLOSED: 644 hsp_ag_reset_state(); 645 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 646 break; 647 648 case RFCOMM_EVENT_CAN_SEND_NOW: 649 hsp_run(); 650 break; 651 652 case HCI_EVENT_DISCONNECTION_COMPLETE: 653 handle = little_endian_read_16(packet,3); 654 if (handle == sco_handle){ 655 sco_handle = HCI_CON_HANDLE_INVALID; 656 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 657 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 658 break; 659 } 660 break; 661 662 default: 663 break; 664 } 665 666 hsp_run(); 667 } 668 669 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 670 UNUSED(packet_type); // ok: handling own sdp events 671 UNUSED(channel); // ok: no channel 672 UNUSED(size); // ok: handling own sdp events 673 674 switch (packet[0]){ 675 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 676 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 677 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 678 break; 679 case SDP_EVENT_QUERY_COMPLETE: 680 if (channel_nr > 0){ 681 hsp_state = HSP_W4_RFCOMM_CONNECTED; 682 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 683 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 684 break; 685 } 686 hsp_ag_reset_state(); 687 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 688 if (sdp_event_query_complete_get_status(packet)){ 689 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 690 } else { 691 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 692 } 693 break; 694 default: 695 break; 696 } 697 } 698 699 void hsp_ag_set_sco_packet_types(uint16_t packet_types){ 700 hsp_ag_sco_packet_types = packet_types; 701 } 702 703