1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hsp_ag.c" 39 40 // ***************************************************************************** 41 // 42 // HSP Audio Gateway 43 // 44 // ***************************************************************************** 45 46 #include "btstack_config.h" 47 48 #include <stdint.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 53 #include "bluetooth_sdp.h" 54 #include "btstack_debug.h" 55 #include "btstack_event.h" 56 #include "btstack_memory.h" 57 #include "btstack_run_loop.h" 58 #include "classic/core.h" 59 #include "classic/sdp_server.h" 60 #include "classic/sdp_client_rfcomm.h" 61 #include "classic/sdp_util.h" 62 #include "hci.h" 63 #include "hci_cmd.h" 64 #include "hci_dump.h" 65 #include "hsp_ag.h" 66 #include "l2cap.h" 67 68 #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" 69 #define HSP_HS_AT_CKPD "AT+CKPD\r\n" 70 #define HSP_AG_OK "\r\nOK\r\n" 71 #define HSP_AG_ERROR "\r\nERROR\r\n" 72 #define HSP_AG_RING "\r\nRING\r\n" 73 #define HSP_MICROPHONE_GAIN "+VGM" 74 #define HSP_SPEAKER_GAIN "+VGS" 75 76 #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" 77 #define HSP_HS_SPEAKER_GAIN "AT+VGS=" 78 79 static const char default_hsp_ag_service_name[] = "Audio Gateway"; 80 81 static bd_addr_t remote; 82 static bd_addr_t sco_event_addr; 83 static uint8_t channel_nr = 0; 84 85 static uint16_t mtu; 86 static uint16_t rfcomm_cid = 0; 87 static uint16_t sco_handle = 0; 88 static uint16_t rfcomm_handle = 0; 89 static btstack_timer_source_t hs_timeout; 90 91 static int ag_microphone_gain = -1; 92 static int ag_speaker_gain = -1; 93 static uint8_t ag_ring = 0; 94 static uint8_t ag_send_ok = 0; 95 static uint8_t ag_send_error = 0; 96 static uint8_t ag_num_button_press_received = 0; 97 static uint8_t ag_support_custom_commands = 0; 98 static uint8_t ag_establish_sco = 0; 99 static uint8_t hsp_disconnect_rfcomm = 0; 100 static uint8_t hsp_establish_audio_connection = 0; 101 static uint8_t hsp_release_audio_connection = 0; 102 103 static btstack_packet_callback_registration_t hci_event_callback_registration; 104 105 typedef enum { 106 HSP_IDLE, 107 HSP_SDP_QUERY_RFCOMM_CHANNEL, 108 HSP_W4_SDP_EVENT_QUERY_COMPLETE, 109 HSP_W4_RFCOMM_CONNECTED, 110 111 HSP_RFCOMM_CONNECTION_ESTABLISHED, 112 113 HSP_W4_RING_ANSWER, 114 HSP_W4_USER_ACTION, 115 HSP_W2_CONNECT_SCO, 116 HSP_W4_SCO_CONNECTED, 117 118 HSP_AUDIO_CONNECTION_ESTABLISHED, 119 120 HSP_W2_DISCONNECT_SCO, 121 HSP_W4_SCO_DISCONNECTED, 122 123 HSP_W2_DISCONNECT_RFCOMM, 124 HSP_W4_RFCOMM_DISCONNECTED, 125 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 126 } hsp_state_t; 127 128 static hsp_state_t hsp_state = HSP_IDLE; 129 130 131 static btstack_packet_handler_t hsp_ag_callback; 132 133 static void hsp_run(void); 134 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 135 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 136 137 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 138 UNUSED(packet_type); 139 UNUSED(channel); 140 UNUSED(event); 141 UNUSED(size); 142 } 143 144 void hsp_ag_register_packet_handler(btstack_packet_handler_t callback){ 145 if (callback == NULL){ 146 callback = &dummy_notify; 147 } 148 hsp_ag_callback = callback; 149 } 150 151 static void emit_event(uint8_t event_subtype, uint8_t value){ 152 if (!hsp_ag_callback) return; 153 uint8_t event[4]; 154 event[0] = HCI_EVENT_HSP_META; 155 event[1] = sizeof(event) - 2; 156 event[2] = event_subtype; 157 event[3] = value; // status 0 == OK 158 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 159 } 160 161 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 162 if (!hsp_ag_callback) return; 163 uint8_t event[6]; 164 event[0] = HCI_EVENT_HSP_META; 165 event[1] = sizeof(event) - 2; 166 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 167 event[3] = status; 168 little_endian_store_16(event, 4, handle); 169 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 170 } 171 172 void hsp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 173 uint8_t* attribute; 174 de_create_sequence(service); 175 176 // 0x0000 "Service Record Handle" 177 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 178 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 179 180 // 0x0001 "Service Class ID List" 181 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 182 attribute = de_push_sequence(service); 183 { 184 // "UUID for PAN Service" 185 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 186 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); 187 } 188 de_pop_sequence(service, attribute); 189 190 // 0x0004 "Protocol Descriptor List" 191 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 192 attribute = de_push_sequence(service); 193 { 194 uint8_t* l2cpProtocol = de_push_sequence(attribute); 195 { 196 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 197 } 198 de_pop_sequence(attribute, l2cpProtocol); 199 200 uint8_t* rfcomm = de_push_sequence(attribute); 201 { 202 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 203 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 204 } 205 de_pop_sequence(attribute, rfcomm); 206 } 207 de_pop_sequence(service, attribute); 208 209 // 0x0005 "Public Browse Group" 210 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 211 attribute = de_push_sequence(service); 212 { 213 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 214 } 215 de_pop_sequence(service, attribute); 216 217 // 0x0009 "Bluetooth Profile Descriptor List" 218 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 219 attribute = de_push_sequence(service); 220 { 221 uint8_t *sppProfile = de_push_sequence(attribute); 222 { 223 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 224 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 225 } 226 de_pop_sequence(attribute, sppProfile); 227 } 228 de_pop_sequence(service, attribute); 229 230 // 0x0100 "Service Name" 231 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 232 if (name){ 233 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 234 } else { 235 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 236 } 237 } 238 239 static int hsp_ag_send_str_over_rfcomm(const uint16_t cid, char * command){ 240 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 241 if (err){ 242 log_error("rfcomm_send_internal -> error 0X%02x", err); 243 return err; 244 } 245 return err; 246 } 247 248 void hsp_ag_enable_custom_commands(int enable){ 249 ag_support_custom_commands = enable; 250 } 251 252 int hsp_ag_send_result(char * result){ 253 if (!ag_support_custom_commands) return 1; 254 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 255 } 256 257 static void hsp_ag_reset_state(void){ 258 hsp_state = HSP_IDLE; 259 260 rfcomm_cid = 0; 261 rfcomm_handle = 0; 262 sco_handle = 0; 263 264 ag_send_ok = 0; 265 ag_send_error = 0; 266 ag_ring = 0; 267 268 ag_num_button_press_received = 0; 269 ag_support_custom_commands = 0; 270 271 ag_microphone_gain = -1; 272 ag_speaker_gain = -1; 273 274 hsp_disconnect_rfcomm = 0; 275 hsp_establish_audio_connection = 0; 276 hsp_release_audio_connection = 0; 277 } 278 279 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 280 // register for HCI events 281 hci_event_callback_registration.callback = &packet_handler; 282 hci_add_event_handler(&hci_event_callback_registration); 283 284 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 285 286 hsp_ag_reset_state(); 287 } 288 289 void hsp_ag_connect(bd_addr_t bd_addr){ 290 if (hsp_state != HSP_IDLE) return; 291 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 292 memcpy(remote, bd_addr, 6); 293 hsp_run(); 294 } 295 296 void hsp_ag_disconnect(void){ 297 hsp_ag_release_audio_connection(); 298 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 299 hsp_state = HSP_IDLE; 300 return; 301 } 302 303 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 304 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 305 return; 306 } 307 hsp_disconnect_rfcomm = 1; 308 hsp_run(); 309 } 310 311 void hsp_ag_establish_audio_connection(void){ 312 switch (hsp_state){ 313 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 314 hsp_establish_audio_connection = 1; 315 hsp_state = HSP_W4_SCO_CONNECTED; 316 break; 317 case HSP_W4_RFCOMM_CONNECTED: 318 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 319 break; 320 default: 321 break; 322 } 323 hsp_run(); 324 } 325 326 void hsp_ag_release_audio_connection(void){ 327 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 328 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 329 330 hsp_release_audio_connection = 1; 331 hsp_run(); 332 } 333 334 335 void hsp_ag_set_microphone_gain(uint8_t gain){ 336 if (gain >15) { 337 log_error("Gain must be in interval [0..15], it is given %d", gain); 338 return; 339 } 340 ag_microphone_gain = gain; 341 hsp_run(); 342 } 343 344 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 345 void hsp_ag_set_speaker_gain(uint8_t gain){ 346 if (gain >15) { 347 log_error("Gain must be in interval [0..15], it is given %d", gain); 348 return; 349 } 350 ag_speaker_gain = gain; 351 hsp_run(); 352 } 353 354 static void hsp_ringing_timeout_handler(btstack_timer_source_t * timer){ 355 UNUSED(timer); 356 357 ag_ring = 1; 358 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 359 btstack_run_loop_add_timer(&hs_timeout); 360 hsp_run(); 361 } 362 363 static void hsp_ringing_timer_start(void){ 364 btstack_run_loop_remove_timer(&hs_timeout); 365 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_ringing_timeout_handler); 366 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 367 btstack_run_loop_add_timer(&hs_timeout); 368 } 369 370 static void hsp_ringing_timer_stop(void){ 371 btstack_run_loop_remove_timer(&hs_timeout); 372 } 373 374 void hsp_ag_start_ringing(void){ 375 ag_ring = 1; 376 if (hsp_state == HSP_W2_CONNECT_SCO) { 377 hsp_state = HSP_W4_RING_ANSWER; 378 } 379 hsp_ringing_timer_start(); 380 } 381 382 void hsp_ag_stop_ringing(void){ 383 ag_ring = 0; 384 if (hsp_state == HSP_W4_RING_ANSWER){ 385 hsp_state = HSP_W2_CONNECT_SCO; 386 } 387 hsp_ringing_timer_stop(); 388 } 389 390 static void hsp_run(void){ 391 if (ag_establish_sco && hci_can_send_command_packet_now()){ 392 ag_establish_sco = 0; 393 394 log_info("HSP: sending hci_accept_connection_request."); 395 // remote supported feature eSCO is set if link type is eSCO 396 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 397 uint16_t max_latency; 398 uint8_t retransmission_effort; 399 uint16_t packet_types; 400 401 if (hci_remote_esco_supported(rfcomm_handle)){ 402 max_latency = 0x000c; 403 retransmission_effort = 0x02; 404 packet_types = 0x388; 405 } else { 406 max_latency = 0xffff; 407 retransmission_effort = 0xff; 408 packet_types = 0x003f; 409 } 410 411 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 412 413 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 414 hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, max_latency, 415 sco_voice_setting, retransmission_effort, packet_types); 416 return; 417 } 418 419 if (ag_send_ok){ 420 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 421 rfcomm_request_can_send_now_event(rfcomm_cid); 422 return; 423 } 424 ag_send_ok = 0; 425 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 426 return; 427 } 428 429 if (ag_send_error){ 430 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 431 rfcomm_request_can_send_now_event(rfcomm_cid); 432 return; 433 } 434 ag_send_error = 0; 435 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 436 return; 437 } 438 439 if (ag_ring){ 440 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 441 rfcomm_request_can_send_now_event(rfcomm_cid); 442 return; 443 } 444 ag_ring = 0; 445 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 446 return; 447 } 448 449 if (hsp_establish_audio_connection){ 450 if (!hci_can_send_command_packet_now()) return; 451 hsp_establish_audio_connection = 0; 452 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 453 return; 454 } 455 456 if (hsp_release_audio_connection){ 457 hsp_release_audio_connection = 0; 458 gap_disconnect(sco_handle); 459 return; 460 } 461 462 if (hsp_disconnect_rfcomm){ 463 hsp_disconnect_rfcomm = 0; 464 hsp_establish_audio_connection = 0; 465 rfcomm_disconnect(rfcomm_cid); 466 return; 467 } 468 469 switch (hsp_state){ 470 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 471 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 472 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET); 473 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET); 474 break; 475 476 case HSP_W4_RING_ANSWER: 477 if (!ag_num_button_press_received) break; 478 479 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 480 rfcomm_request_can_send_now_event(rfcomm_cid); 481 return; 482 } 483 484 ag_send_ok = 0; 485 ag_num_button_press_received = 0; 486 hsp_state = HSP_W2_CONNECT_SCO; 487 488 hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 489 break; 490 491 case HSP_W2_CONNECT_SCO: 492 if (!hci_can_send_command_packet_now()) return; 493 hsp_state = HSP_W4_SCO_CONNECTED; 494 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 495 break; 496 497 case HSP_W2_DISCONNECT_SCO: 498 ag_num_button_press_received = 0; 499 500 hsp_state = HSP_W4_SCO_DISCONNECTED; 501 gap_disconnect(sco_handle); 502 break; 503 504 case HSP_W2_DISCONNECT_RFCOMM: 505 rfcomm_disconnect(rfcomm_cid); 506 break; 507 508 case HSP_AUDIO_CONNECTION_ESTABLISHED: 509 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 510 511 if (ag_microphone_gain >= 0){ 512 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 513 rfcomm_request_can_send_now_event(rfcomm_cid); 514 return; 515 } 516 int gain = ag_microphone_gain; 517 ag_microphone_gain = -1; 518 char buffer[10]; 519 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 520 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 521 break; 522 } 523 524 if (ag_speaker_gain >= 0){ 525 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 526 rfcomm_request_can_send_now_event(rfcomm_cid); 527 return; 528 } 529 int gain = ag_speaker_gain; 530 ag_speaker_gain = -1; 531 char buffer[10]; 532 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 533 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 534 break; 535 } 536 break; 537 default: 538 break; 539 } 540 } 541 542 543 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 544 UNUSED(channel); 545 546 if (packet_type == RFCOMM_DATA_PACKET){ 547 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 548 size--; 549 packet++; 550 } 551 552 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 553 log_info("Received button press %s", HSP_HS_BUTTON_PRESS); 554 ag_send_ok = 1; 555 switch (hsp_state){ 556 case HSP_AUDIO_CONNECTION_ESTABLISHED: 557 hsp_release_audio_connection = 1; 558 break; 559 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 560 hsp_establish_audio_connection = 1; 561 break; 562 default: 563 break; 564 } 565 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 566 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 567 ag_send_ok = 1; 568 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 569 570 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 571 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 572 ag_send_ok = 1; 573 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 574 575 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 576 ag_send_error = 1; 577 if (!hsp_ag_callback) return; 578 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 579 uint8_t * event = packet - 4; 580 event[0] = HCI_EVENT_HSP_META; 581 event[1] = size + 2; 582 event[2] = HSP_SUBEVENT_HS_COMMAND; 583 event[3] = size; 584 (*hsp_ag_callback)(HCI_EVENT_PACKET, 0, event, size+4); 585 } 586 587 hsp_run(); 588 return; 589 } 590 591 if (packet_type != HCI_EVENT_PACKET) return; 592 uint8_t event = hci_event_packet_get_type(packet); 593 bd_addr_t event_addr; 594 uint16_t handle; 595 596 switch (event) { 597 case HCI_EVENT_CONNECTION_REQUEST: 598 hci_event_connection_request_get_bd_addr(packet, sco_event_addr); 599 ag_establish_sco = 1; 600 break; 601 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 602 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 603 if (status != 0){ 604 log_error("(e)SCO Connection failed, status %u", status); 605 emit_event_audio_connected(status, sco_handle); 606 break; 607 } 608 609 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 610 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 611 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 612 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 613 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 614 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 615 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 616 uint8_t air_mode = hci_event_synchronous_connection_complete_get_air_mode(packet); 617 618 switch (link_type){ 619 case 0x00: 620 log_info("SCO Connection established."); 621 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 622 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 623 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 624 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 625 break; 626 case 0x02: 627 log_info("eSCO Connection established."); 628 break; 629 default: 630 log_error("(e)SCO reserved link_type 0x%2x", link_type); 631 break; 632 } 633 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 634 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 635 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 636 637 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 638 hsp_state = HSP_W2_DISCONNECT_SCO; 639 break; 640 } 641 642 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 643 emit_event_audio_connected(status, sco_handle); 644 break; 645 } 646 647 case RFCOMM_EVENT_INCOMING_CONNECTION: 648 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 649 if (hsp_state != HSP_IDLE) return; 650 651 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 652 rfcomm_cid = rfcomm_event_incoming_connection_get_server_channel(packet); 653 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 654 hsp_state = HSP_W4_RFCOMM_CONNECTED; 655 rfcomm_accept_connection(rfcomm_cid); 656 break; 657 658 case RFCOMM_EVENT_CHANNEL_OPENED: 659 log_info("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x", packet_type, packet[0]); 660 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 661 if (rfcomm_event_channel_opened_get_status(packet)) { 662 log_info("RFCOMM channel open failed, status %u§", rfcomm_event_channel_opened_get_status(packet)); 663 hsp_ag_reset_state(); 664 hsp_state = HSP_IDLE; 665 } else { 666 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 667 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 668 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 669 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 670 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state); 671 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 672 } 673 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 674 break; 675 676 case RFCOMM_EVENT_CHANNEL_CLOSED: 677 rfcomm_handle = 0; 678 hsp_state = HSP_IDLE; 679 hsp_ag_reset_state(); 680 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 681 break; 682 683 case RFCOMM_EVENT_CAN_SEND_NOW: 684 hsp_run(); 685 break; 686 687 case HCI_EVENT_DISCONNECTION_COMPLETE: 688 handle = little_endian_read_16(packet,3); 689 if (handle == sco_handle){ 690 sco_handle = 0; 691 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 692 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 693 break; 694 } 695 if (handle == rfcomm_handle) { 696 rfcomm_handle = 0; 697 hsp_state = HSP_IDLE; 698 hsp_ag_reset_state(); 699 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 700 } 701 break; 702 703 default: 704 break; 705 } 706 707 hsp_run(); 708 } 709 710 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 711 UNUSED(packet_type); 712 UNUSED(channel); 713 UNUSED(size); 714 715 switch (packet[0]){ 716 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 717 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 718 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 719 break; 720 case SDP_EVENT_QUERY_COMPLETE: 721 if (channel_nr > 0){ 722 hsp_state = HSP_W4_RFCOMM_CONNECTED; 723 log_info("RFCOMM create channel. state %d", HSP_W4_RFCOMM_CONNECTED); 724 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 725 break; 726 } 727 hsp_ag_reset_state(); 728 log_info("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 729 if (sdp_event_query_complete_get_status(packet)){ 730 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 731 } else { 732 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 733 } 734 break; 735 default: 736 break; 737 } 738 } 739 740 741