1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hsp_ag.c" 39 40 // ***************************************************************************** 41 // 42 // HSP Audio Gateway 43 // 44 // ***************************************************************************** 45 46 #include "btstack_config.h" 47 48 #include <stdint.h> 49 #include <string.h> 50 51 #include "bluetooth_sdp.h" 52 #include "btstack_debug.h" 53 #include "btstack_event.h" 54 #include "btstack_memory.h" 55 #include "btstack_run_loop.h" 56 #include "classic/core.h" 57 #include "classic/sdp_server.h" 58 #include "classic/sdp_client_rfcomm.h" 59 #include "classic/sdp_util.h" 60 #include "classic/sdp_client.h" 61 #include "hci.h" 62 #include "hci_cmd.h" 63 #include "hci_dump.h" 64 #include "hsp_ag.h" 65 #include "l2cap.h" 66 67 #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" 68 #define HSP_HS_AT_CKPD "AT+CKPD\r\n" 69 #define HSP_AG_OK "\r\nOK\r\n" 70 #define HSP_AG_ERROR "\r\nERROR\r\n" 71 #define HSP_AG_RING "\r\nRING\r\n" 72 #define HSP_MICROPHONE_GAIN "+VGM" 73 #define HSP_SPEAKER_GAIN "+VGS" 74 75 #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" 76 #define HSP_HS_SPEAKER_GAIN "AT+VGS=" 77 78 static const char default_hsp_ag_service_name[] = "Audio Gateway"; 79 80 static bd_addr_t remote; 81 static uint8_t channel_nr = 0; 82 83 static uint16_t mtu; 84 static uint16_t rfcomm_cid = 0; 85 static uint16_t sco_handle = HCI_CON_HANDLE_INVALID; 86 static uint16_t rfcomm_handle = HCI_CON_HANDLE_INVALID; 87 static btstack_timer_source_t hs_timeout; 88 89 static int ag_microphone_gain = -1; 90 static int ag_speaker_gain = -1; 91 static uint8_t ag_ring = 0; 92 static uint8_t ag_send_ok = 0; 93 static uint8_t ag_send_error = 0; 94 static uint8_t ag_support_custom_commands = 0; 95 static uint8_t hsp_disconnect_rfcomm = 0; 96 static uint8_t hsp_release_audio_connection = 0; 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 = HSP_IDLE; 126 127 static btstack_context_callback_registration_t hsp_ag_handle_sdp_client_query_request; 128 static btstack_packet_handler_t hsp_ag_callback; 129 130 static void hsp_run(void); 131 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 132 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 133 134 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 135 UNUSED(packet_type); // ok: no code 136 UNUSED(channel); // ok: no code 137 UNUSED(event); // ok: no code 138 UNUSED(size); // ok: no code 139 } 140 141 void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){ 142 if (callback == NULL){ 143 callback = &dummy_notify; 144 } 145 hsp_ag_callback = callback; 146 } 147 148 static void emit_event(uint8_t event_subtype, uint8_t value){ 149 if (!hsp_ag_callback) return; 150 uint8_t event[4]; 151 event[0] = HCI_EVENT_HSP_META; 152 event[1] = sizeof(event) - 2; 153 event[2] = event_subtype; 154 event[3] = value; // status 0 == OK 155 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 156 } 157 158 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 159 if (!hsp_ag_callback) return; 160 uint8_t event[6]; 161 event[0] = HCI_EVENT_HSP_META; 162 event[1] = sizeof(event) - 2; 163 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 164 event[3] = status; 165 little_endian_store_16(event, 4, handle); 166 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 167 } 168 169 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 170 uint8_t* attribute; 171 de_create_sequence(service); 172 173 // 0x0000 "Service Record Handle" 174 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 175 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 176 177 // 0x0001 "Service Class ID List" 178 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 179 attribute = de_push_sequence(service); 180 { 181 // "UUID for PAN Service" 182 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 183 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); 184 } 185 de_pop_sequence(service, attribute); 186 187 // 0x0004 "Protocol Descriptor List" 188 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 189 attribute = de_push_sequence(service); 190 { 191 uint8_t* l2cpProtocol = de_push_sequence(attribute); 192 { 193 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 194 } 195 de_pop_sequence(attribute, l2cpProtocol); 196 197 uint8_t* rfcomm = de_push_sequence(attribute); 198 { 199 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 200 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 201 } 202 de_pop_sequence(attribute, rfcomm); 203 } 204 de_pop_sequence(service, attribute); 205 206 // 0x0005 "Public Browse Group" 207 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 208 attribute = de_push_sequence(service); 209 { 210 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 211 } 212 de_pop_sequence(service, attribute); 213 214 // 0x0009 "Bluetooth Profile Descriptor List" 215 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 216 attribute = de_push_sequence(service); 217 { 218 uint8_t *sppProfile = de_push_sequence(attribute); 219 { 220 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 221 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 222 } 223 de_pop_sequence(attribute, sppProfile); 224 } 225 de_pop_sequence(service, attribute); 226 227 // 0x0100 "Service Name" 228 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 229 if (name){ 230 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 231 } else { 232 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 233 } 234 } 235 236 static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, const char * command){ 237 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 238 if (err){ 239 log_error("rfcomm_send_internal -> error 0X%02x", err); 240 return err; 241 } 242 return err; 243 } 244 245 void hsp_ag_enable_custom_commands(int enable){ 246 ag_support_custom_commands = enable; 247 } 248 249 int hsp_ag_send_result(char * result){ 250 if (!ag_support_custom_commands) return 1; 251 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 252 } 253 254 static void hsp_ag_reset_state(void){ 255 hsp_state = HSP_IDLE; 256 257 rfcomm_cid = 0; 258 rfcomm_handle = HCI_CON_HANDLE_INVALID; 259 sco_handle = 0; 260 261 ag_send_ok = 0; 262 ag_send_error = 0; 263 ag_ring = 0; 264 265 ag_support_custom_commands = 0; 266 267 ag_microphone_gain = -1; 268 ag_speaker_gain = -1; 269 270 hsp_disconnect_rfcomm = 0; 271 hsp_release_audio_connection = 0; 272 } 273 274 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 275 // register for HCI events 276 hci_event_callback_registration.callback = &packet_handler; 277 hci_add_event_handler(&hci_event_callback_registration); 278 279 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 280 281 hsp_ag_sco_packet_types = SCO_PACKET_TYPES_ALL; 282 hsp_ag_reset_state(); 283 } 284 285 static void hsp_ag_handle_start_sdp_client_query(void * context){ 286 UNUSED(context); 287 if (hsp_state != HSP_W2_SEND_SDP_QUERY) return; 288 289 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 290 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET); 291 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET); 292 } 293 294 void hsp_ag_connect(bd_addr_t bd_addr){ 295 if (hsp_state != HSP_IDLE) return; 296 297 (void)memcpy(remote, bd_addr, 6); 298 hsp_state = HSP_W2_SEND_SDP_QUERY; 299 hsp_ag_handle_sdp_client_query_request.callback = &hsp_ag_handle_start_sdp_client_query; 300 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 301 (void) sdp_client_register_query_callback(&hsp_ag_handle_sdp_client_query_request); 302 } 303 304 void hsp_ag_disconnect(void){ 305 hsp_ag_release_audio_connection(); 306 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 307 hsp_state = HSP_IDLE; 308 return; 309 } 310 311 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 312 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 313 return; 314 } 315 hsp_disconnect_rfcomm = 1; 316 hsp_run(); 317 } 318 319 void hsp_ag_establish_audio_connection(void){ 320 switch (hsp_state){ 321 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 322 hsp_state = HSP_W2_CONNECT_SCO; 323 break; 324 case HSP_W4_RFCOMM_CONNECTED: 325 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 326 break; 327 default: 328 break; 329 } 330 hsp_run(); 331 } 332 333 void hsp_ag_release_audio_connection(void){ 334 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 335 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 336 337 hsp_release_audio_connection = 1; 338 hsp_run(); 339 } 340 341 342 void hsp_ag_set_microphone_gain(uint8_t gain){ 343 if (gain >15) { 344 log_error("Gain must be in interval [0..15], it is given %d", gain); 345 return; 346 } 347 ag_microphone_gain = gain; 348 hsp_run(); 349 } 350 351 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 352 void hsp_ag_set_speaker_gain(uint8_t gain){ 353 if (gain >15) { 354 log_error("Gain must be in interval [0..15], it is given %d", gain); 355 return; 356 } 357 ag_speaker_gain = gain; 358 hsp_run(); 359 } 360 361 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 362 ag_ring = 1; 363 btstack_run_loop_set_timer(timer, 2000); // 2 seconds timeout 364 btstack_run_loop_add_timer(timer); 365 hsp_run(); 366 } 367 368 static void hsp_ringing_timer_start(void){ 369 btstack_run_loop_remove_timer(&hs_timeout); 370 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 371 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 372 btstack_run_loop_add_timer(&hs_timeout); 373 } 374 375 static void hsp_ringing_timer_stop(void){ 376 btstack_run_loop_remove_timer(&hs_timeout); 377 } 378 379 void hsp_ag_start_ringing(void){ 380 ag_ring = 1; 381 if (hsp_state == HSP_W2_CONNECT_SCO) { 382 hsp_state = HSP_W4_RING_ANSWER; 383 } 384 hsp_ringing_timer_start(); 385 } 386 387 void hsp_ag_stop_ringing(void){ 388 ag_ring = 0; 389 if (hsp_state == HSP_W4_RING_ANSWER){ 390 hsp_state = HSP_W2_CONNECT_SCO; 391 } 392 hsp_ringing_timer_stop(); 393 } 394 395 static void hsp_run(void){ 396 uint16_t packet_types; 397 398 if (ag_send_ok){ 399 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 400 rfcomm_request_can_send_now_event(rfcomm_cid); 401 return; 402 } 403 ag_send_ok = 0; 404 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 405 return; 406 } 407 408 if (ag_send_error){ 409 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 410 rfcomm_request_can_send_now_event(rfcomm_cid); 411 return; 412 } 413 ag_send_error = 0; 414 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 415 return; 416 } 417 418 if (ag_ring){ 419 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 420 rfcomm_request_can_send_now_event(rfcomm_cid); 421 return; 422 } 423 ag_ring = 0; 424 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 425 return; 426 } 427 428 if (hsp_release_audio_connection){ 429 hsp_release_audio_connection = 0; 430 gap_disconnect(sco_handle); 431 return; 432 } 433 434 if (hsp_disconnect_rfcomm){ 435 hsp_disconnect_rfcomm = 0; 436 rfcomm_disconnect(rfcomm_cid); 437 return; 438 } 439 440 switch (hsp_state){ 441 442 case HSP_W4_RING_ANSWER: 443 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 444 rfcomm_request_can_send_now_event(rfcomm_cid); 445 return; 446 } 447 448 ag_send_ok = 0; 449 hsp_state = HSP_W2_CONNECT_SCO; 450 451 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 452 break; 453 454 case HSP_W2_CONNECT_SCO: 455 if (!hci_can_send_command_packet_now()) return; 456 hsp_state = HSP_W4_SCO_CONNECTED; 457 // bits 6-9 are 'don't use' 458 packet_types = hsp_ag_sco_packet_types ^ 0x3c0; 459 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, packet_types); 460 break; 461 462 case HSP_W2_DISCONNECT_SCO: 463 hsp_state = HSP_W4_SCO_DISCONNECTED; 464 gap_disconnect(sco_handle); 465 break; 466 467 case HSP_W2_DISCONNECT_RFCOMM: 468 rfcomm_disconnect(rfcomm_cid); 469 break; 470 471 case HSP_AUDIO_CONNECTION_ESTABLISHED: 472 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 473 474 if (ag_microphone_gain >= 0){ 475 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 476 rfcomm_request_can_send_now_event(rfcomm_cid); 477 return; 478 } 479 int gain = ag_microphone_gain; 480 ag_microphone_gain = -1; 481 char buffer[10]; 482 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 483 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 484 break; 485 } 486 487 if (ag_speaker_gain >= 0){ 488 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 489 rfcomm_request_can_send_now_event(rfcomm_cid); 490 return; 491 } 492 int gain = ag_speaker_gain; 493 ag_speaker_gain = -1; 494 char buffer[10]; 495 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 496 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 497 break; 498 } 499 break; 500 default: 501 break; 502 } 503 } 504 505 506 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 507 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 508 509 if (packet_type == RFCOMM_DATA_PACKET){ 510 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 511 size--; 512 packet++; 513 } 514 515 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 516 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 517 ag_send_ok = 1; 518 switch (hsp_state){ 519 case HSP_AUDIO_CONNECTION_ESTABLISHED: 520 hsp_release_audio_connection = 1; 521 break; 522 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 523 hsp_state = HSP_W2_CONNECT_SCO; 524 break; 525 default: 526 break; 527 } 528 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 529 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 530 ag_send_ok = 1; 531 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 532 533 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 534 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 535 ag_send_ok = 1; 536 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 537 538 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 539 ag_send_error = 1; 540 if (!hsp_ag_callback) return; 541 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 542 uint8_t * event = packet - 4; 543 event[0] = HCI_EVENT_HSP_META; 544 event[1] = size + 2; 545 event[2] = HSP_SUBEVENT_HS_COMMAND; 546 event[3] = size; 547 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 548 } 549 550 hsp_run(); 551 return; 552 } 553 554 if (packet_type != HCI_EVENT_PACKET) return; 555 uint8_t event = hci_event_packet_get_type(packet); 556 bd_addr_t event_addr; 557 uint16_t handle; 558 559 switch (event) { 560 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 561 if (hsp_state != HSP_W4_SCO_CONNECTED) break; 562 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 563 if (status != 0){ 564 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 565 log_error("(e)SCO Connection failed, status %u", status); 566 emit_event_audio_connected(status, sco_handle); 567 break; 568 } 569 570 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 571 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 572 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 573 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 574 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 575 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 576 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 577 uint8_t air_mode = hci_event_synchronous_connection_complete_get_air_mode(packet); 578 579 switch (link_type){ 580 case 0x00: 581 log_info("SCO Connection established."); 582 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 583 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 584 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 585 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 586 break; 587 case 0x02: 588 log_info("eSCO Connection established."); 589 break; 590 default: 591 log_error("(e)SCO reserved link_type 0x%2x", link_type); 592 break; 593 } 594 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 595 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 596 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 597 598 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 599 hsp_state = HSP_W2_DISCONNECT_SCO; 600 break; 601 } 602 603 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 604 emit_event_audio_connected(status, sco_handle); 605 break; 606 } 607 608 case RFCOMM_EVENT_INCOMING_CONNECTION: 609 if (hsp_state != HSP_IDLE) return; 610 611 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 612 rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 613 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); 614 hsp_state = HSP_W4_RFCOMM_CONNECTED; 615 rfcomm_accept_connection(rfcomm_cid); 616 break; 617 618 case RFCOMM_EVENT_CHANNEL_OPENED: 619 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 620 if (rfcomm_event_channel_opened_get_status(packet)) { 621 log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet)); 622 hsp_ag_reset_state(); 623 hsp_state = HSP_IDLE; 624 } else { 625 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 626 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 627 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 628 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 629 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 630 } 631 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 632 break; 633 634 case RFCOMM_EVENT_CHANNEL_CLOSED: 635 hsp_ag_reset_state(); 636 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 637 break; 638 639 case RFCOMM_EVENT_CAN_SEND_NOW: 640 hsp_run(); 641 break; 642 643 case HCI_EVENT_DISCONNECTION_COMPLETE: 644 handle = little_endian_read_16(packet,3); 645 if (handle == sco_handle){ 646 sco_handle = HCI_CON_HANDLE_INVALID; 647 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 648 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 649 break; 650 } 651 break; 652 653 default: 654 break; 655 } 656 657 hsp_run(); 658 } 659 660 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 661 UNUSED(packet_type); // ok: handling own sdp events 662 UNUSED(channel); // ok: no channel 663 UNUSED(size); // ok: handling own sdp events 664 665 switch (packet[0]){ 666 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 667 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 668 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 669 break; 670 case SDP_EVENT_QUERY_COMPLETE: 671 if (channel_nr > 0){ 672 hsp_state = HSP_W4_RFCOMM_CONNECTED; 673 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 674 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 675 break; 676 } 677 hsp_ag_reset_state(); 678 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 679 if (sdp_event_query_complete_get_status(packet)){ 680 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 681 } else { 682 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 683 } 684 break; 685 default: 686 break; 687 } 688 } 689 690 void hsp_ag_set_sco_packet_types(uint16_t packet_types){ 691 hsp_ag_sco_packet_types = packet_types; 692 } 693 694