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_hs.c" 39 40 // ***************************************************************************** 41 // 42 // HSP Headset 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_hs.h" 66 #include "l2cap.h" 67 68 #define HSP_AG_OK "OK" 69 #define HSP_AG_ERROR "ERROR" 70 #define HSP_AG_RING "RING" 71 #define HSP_MICROPHONE_GAIN "+VGM=" 72 #define HSP_SPEAKER_GAIN "+VGS=" 73 74 #define HSP_HS_AT_CKPD "AT+CKPD=200\r\n" 75 #define HSP_HS_MICROPHONE_GAIN "AT+VGM" 76 #define HSP_HS_SPEAKER_GAIN "AT+VGS" 77 78 static const char default_hsp_hs_service_name[] = "Headset"; 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 = 0; 86 static uint16_t rfcomm_handle = 0; 87 88 // static uint8_t connection_state = 0; 89 90 static int hs_microphone_gain = -1; 91 static int hs_speaker_gain = -1; 92 93 static uint8_t hs_send_button_press = 0; 94 static uint8_t wait_ok = 0; 95 static uint8_t hs_accept_sco_connection = 0; 96 97 static uint8_t hs_support_custom_indications = 0; 98 static btstack_packet_callback_registration_t hci_event_callback_registration; 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 typedef enum { 104 HSP_IDLE, 105 HSP_SDP_QUERY_RFCOMM_CHANNEL, 106 HSP_W4_SDP_QUERY_COMPLETE, 107 HSP_W4_RFCOMM_CONNECTED, 108 109 HSP_RFCOMM_CONNECTION_ESTABLISHED, 110 111 HSP_W2_CONNECT_SCO, 112 HSP_W4_SCO_CONNECTED, 113 114 HSP_AUDIO_CONNECTION_ESTABLISHED, 115 116 HSP_W2_DISCONNECT_SCO, 117 HSP_W4_SCO_DISCONNECTED, 118 119 HSP_W2_DISCONNECT_RFCOMM, 120 HSP_W4_RFCOMM_DISCONNECTED, 121 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 122 } hsp_state_t; 123 124 static hsp_state_t hsp_state = HSP_IDLE; 125 126 static void hsp_run(void); 127 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 128 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 129 130 static btstack_packet_handler_t hsp_hs_callback; 131 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 132 // ok: no code 133 UNUSED(packet_type); 134 UNUSED(channel); 135 UNUSED(event); 136 UNUSED(size); 137 } 138 139 void hsp_hs_register_packet_handler(btstack_packet_handler_t callback){ 140 if (callback == NULL){ 141 callback = &dummy_notify; 142 } 143 hsp_hs_callback = callback; 144 } 145 146 static void emit_event(uint8_t event_subtype, uint8_t value){ 147 if (!hsp_hs_callback) return; 148 uint8_t event[4]; 149 event[0] = HCI_EVENT_HSP_META; 150 event[1] = sizeof(event) - 2; 151 event[2] = event_subtype; 152 event[3] = value; // status 0 == OK 153 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 154 } 155 156 static void emit_ring_event(void){ 157 if (!hsp_hs_callback) return; 158 uint8_t event[3]; 159 event[0] = HCI_EVENT_HSP_META; 160 event[1] = sizeof(event) - 2; 161 event[2] = HSP_SUBEVENT_RING; 162 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 163 } 164 165 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 166 if (!hsp_hs_callback) return; 167 uint8_t event[6]; 168 event[0] = HCI_EVENT_HSP_META; 169 event[1] = sizeof(event) - 2; 170 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 171 event[3] = status; 172 little_endian_store_16(event, 4, handle); 173 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 174 } 175 176 // remote audio volume control 177 // AG +VGM=13 [0..15] ; HS AT+VGM=6 | AG OK 178 179 static int hsp_hs_send_str_over_rfcomm(uint16_t cid, const char * command){ 180 if (!rfcomm_can_send_packet_now(rfcomm_cid)) return 1; 181 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 182 if (err){ 183 log_info("rfcomm_send_internal -> error 0X%02x", err); 184 } 185 return err; 186 } 187 188 void hsp_hs_enable_custom_indications(int enable){ 189 hs_support_custom_indications = enable; 190 } 191 192 int hsp_hs_send_result(const char * result){ 193 if (!hs_support_custom_indications) return 1; 194 return hsp_hs_send_str_over_rfcomm(rfcomm_cid, result); 195 } 196 197 198 void hsp_hs_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name, uint8_t have_remote_audio_control){ 199 uint8_t* attribute; 200 de_create_sequence(service); 201 202 // 0x0000 "Service Record Handle" 203 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 204 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 205 206 // 0x0001 "Service Class ID List" 207 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 208 attribute = de_push_sequence(service); 209 { 210 // see Bluetooth Erratum #3507 211 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); // 0x1108 212 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_HS); // 0x1131 213 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); // 0x1203 214 } 215 de_pop_sequence(service, attribute); 216 217 // 0x0004 "Protocol Descriptor List" 218 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 219 attribute = de_push_sequence(service); 220 { 221 uint8_t* l2cpProtocol = de_push_sequence(attribute); 222 { 223 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 224 } 225 de_pop_sequence(attribute, l2cpProtocol); 226 227 uint8_t* rfcomm = de_push_sequence(attribute); 228 { 229 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 230 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 231 } 232 de_pop_sequence(attribute, rfcomm); 233 } 234 de_pop_sequence(service, attribute); 235 236 // 0x0005 "Public Browse Group" 237 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 238 attribute = de_push_sequence(service); 239 { 240 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 241 } 242 de_pop_sequence(service, attribute); 243 244 // 0x0009 "Bluetooth Profile Descriptor List" 245 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 246 attribute = de_push_sequence(service); 247 { 248 uint8_t *hsp_profile = de_push_sequence(attribute); 249 { 250 de_add_number(hsp_profile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 251 de_add_number(hsp_profile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 252 } 253 de_pop_sequence(attribute, hsp_profile); 254 } 255 de_pop_sequence(service, attribute); 256 257 // 0x0100 "Service Name" 258 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 259 if (name){ 260 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 261 } else { 262 de_add_data(service, DE_STRING, strlen(default_hsp_hs_service_name), (uint8_t *) default_hsp_hs_service_name); 263 } 264 265 // Remote audio volume control 266 de_add_number(service, DE_UINT, DE_SIZE_16, 0x030C); 267 de_add_number(service, DE_BOOL, DE_SIZE_8, have_remote_audio_control); 268 } 269 270 static void hsp_hs_reset_state(void){ 271 hsp_state = HSP_IDLE; 272 hs_microphone_gain = -1; 273 hs_speaker_gain = -1; 274 275 hs_send_button_press = 0; 276 wait_ok = 0; 277 hs_support_custom_indications = 0; 278 279 hsp_disconnect_rfcomm = 0; 280 hsp_establish_audio_connection = 0; 281 hsp_release_audio_connection = 0; 282 } 283 284 void hsp_hs_init(uint8_t rfcomm_channel_nr){ 285 // register for HCI events 286 hci_event_callback_registration.callback = &packet_handler; 287 hci_add_event_handler(&hci_event_callback_registration); 288 289 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 290 291 hsp_hs_reset_state(); 292 } 293 294 295 void hsp_hs_connect(bd_addr_t bd_addr){ 296 if (hsp_state != HSP_IDLE) return; 297 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 298 (void)memcpy(remote, bd_addr, 6); 299 hsp_run(); 300 } 301 302 void hsp_hs_disconnect(void){ 303 hsp_hs_release_audio_connection(); 304 305 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 306 hsp_state = HSP_IDLE; 307 return; 308 } 309 310 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 311 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 312 return; 313 } 314 315 if (hsp_state < HSP_W4_SCO_CONNECTED){ 316 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 317 return; 318 } 319 320 hsp_disconnect_rfcomm = 1; 321 hsp_run(); 322 } 323 324 325 void hsp_hs_establish_audio_connection(void){ 326 switch (hsp_state){ 327 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 328 hsp_establish_audio_connection = 1; 329 hsp_state = HSP_W4_SCO_CONNECTED; 330 break; 331 case HSP_W4_RFCOMM_CONNECTED: 332 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 333 break; 334 default: 335 break; 336 } 337 hsp_run(); 338 } 339 340 void hsp_hs_release_audio_connection(void){ 341 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 342 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 343 hsp_release_audio_connection = 1; 344 hsp_run(); 345 } 346 347 void hsp_hs_set_microphone_gain(uint8_t gain){ 348 if (gain >15) { 349 log_info("Gain must be in interval [0..15], it is given %d", gain); 350 return; 351 } 352 hs_microphone_gain = gain; 353 hsp_run(); 354 } 355 356 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 357 void hsp_hs_set_speaker_gain(uint8_t gain){ 358 if (gain >15) { 359 log_info("Gain must be in interval [0..15], it is given %d", gain); 360 return; 361 } 362 hs_speaker_gain = gain; 363 hsp_run(); 364 } 365 366 367 static void hsp_run(void){ 368 369 if (wait_ok) return; 370 371 if (hs_accept_sco_connection && hci_can_send_command_packet_now()){ 372 hs_accept_sco_connection = 0; 373 374 log_info("HSP: sending hci_accept_connection_request."); 375 // remote supported feature eSCO is set if link type is eSCO 376 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 377 uint16_t max_latency; 378 uint8_t retransmission_effort; 379 uint16_t packet_types; 380 381 if (hci_remote_esco_supported(rfcomm_handle)){ 382 max_latency = 0x000c; 383 retransmission_effort = 0x02; 384 packet_types = 0x388; 385 } else { 386 max_latency = 0xffff; 387 retransmission_effort = 0xff; 388 packet_types = 0x003f; 389 } 390 391 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 392 393 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 394 hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, max_latency, 395 sco_voice_setting, retransmission_effort, packet_types); 396 return; 397 } 398 399 if (hsp_release_audio_connection){ 400 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 401 rfcomm_request_can_send_now_event(rfcomm_cid); 402 return; 403 } 404 hsp_release_audio_connection = 0; 405 wait_ok = 1; 406 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 407 return; 408 } 409 410 if (hsp_disconnect_rfcomm){ 411 hsp_disconnect_rfcomm = 0; 412 hsp_establish_audio_connection = 0; 413 rfcomm_disconnect(rfcomm_cid); 414 return; 415 } 416 417 if (hsp_establish_audio_connection){ 418 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 419 rfcomm_request_can_send_now_event(rfcomm_cid); 420 return; 421 } 422 hsp_establish_audio_connection = 0; 423 wait_ok = 1; 424 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 425 return; 426 } 427 428 if (hs_send_button_press){ 429 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 430 rfcomm_request_can_send_now_event(rfcomm_cid); 431 return; 432 } 433 hs_send_button_press = 0; 434 wait_ok = 1; 435 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 436 return; 437 } 438 439 switch (hsp_state){ 440 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 441 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 442 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 443 break; 444 445 case HSP_AUDIO_CONNECTION_ESTABLISHED: 446 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 447 448 if (hs_microphone_gain >= 0){ 449 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 450 rfcomm_request_can_send_now_event(rfcomm_cid); 451 return; 452 } 453 char buffer[20]; 454 sprintf(buffer, "%s=%d\r\n", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain); 455 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 456 hs_microphone_gain = -1; 457 break; 458 } 459 460 if (hs_speaker_gain >= 0){ 461 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 462 rfcomm_request_can_send_now_event(rfcomm_cid); 463 return; 464 } 465 char buffer[20]; 466 sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain); 467 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 468 hs_speaker_gain = -1; 469 break; 470 } 471 break; 472 case HSP_W4_RFCOMM_DISCONNECTED: 473 rfcomm_disconnect(rfcomm_cid); 474 break; 475 default: 476 break; 477 } 478 } 479 480 481 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 482 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 483 if (packet_type == RFCOMM_DATA_PACKET){ 484 // printf("packet_handler type RFCOMM_DATA_PACKET %u, packet[0] %x\n", packet_type, packet[0]); 485 // skip over leading newline 486 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 487 size--; 488 packet++; 489 } 490 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 491 emit_ring_event(); 492 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 493 wait_ok = 0; 494 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 495 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 496 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 497 498 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 499 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 500 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 501 } else { 502 if (!hsp_hs_callback) return; 503 // strip trailing newline 504 while ((size > 0) && ((packet[size-1] == '\n') || (packet[size-1] == '\r'))){ 505 size--; 506 } 507 // add trailing \0 508 packet[size] = 0; 509 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 510 uint8_t * event = packet - 4; 511 event[0] = HCI_EVENT_HSP_META; 512 event[1] = size + 2; 513 event[2] = HSP_SUBEVENT_AG_INDICATION; 514 event[3] = size; 515 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+4); 516 } 517 hsp_run(); 518 return; 519 } 520 521 if (packet_type != HCI_EVENT_PACKET) return; 522 uint8_t event = hci_event_packet_get_type(packet); 523 bd_addr_t event_addr; 524 uint16_t handle; 525 // printf("packet_handler HCI_EVENT_PACKET type %u, packet[0] %x\n", packet_type, packet[0]); 526 switch (event) { 527 case HCI_EVENT_CONNECTION_REQUEST: 528 switch(hci_event_connection_request_get_link_type(packet)){ 529 case 0: // SCO 530 case 2: // eSCO 531 hci_event_connection_request_get_bd_addr(packet, event_addr); 532 printf("remote device %s\n", bd_addr_to_str(remote)); 533 printf("accept sco for device %s\n", bd_addr_to_str(event_addr)); 534 535 if (bd_addr_cmp(event_addr, remote) == 0){ 536 printf("hs_accept_sco_connection \n"); 537 hs_accept_sco_connection = 1; 538 } 539 break; 540 default: 541 break; 542 } 543 break; 544 545 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 546 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 547 int index = 2; 548 uint8_t status = packet[index++]; 549 sco_handle = little_endian_read_16(packet, index); 550 index+=2; 551 bd_addr_t address; 552 (void)memcpy(address, &packet[index], 6); 553 index+=6; 554 uint8_t link_type = packet[index++]; 555 uint8_t transmission_interval = packet[index++]; // measured in slots 556 uint8_t retransmission_interval = packet[index++];// measured in slots 557 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 558 index+=2; 559 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 560 index+=2; 561 uint8_t air_mode = packet[index]; 562 563 if (status != 0){ 564 log_error("(e)SCO Connection failed, status %u", status); 565 emit_event_audio_connected(status, sco_handle); 566 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 567 break; 568 } 569 570 switch (link_type){ 571 case 0x00: 572 log_info("SCO Connection established."); 573 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 574 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 575 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 576 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 577 break; 578 case 0x02: 579 log_info("eSCO Connection established."); 580 break; 581 default: 582 log_error("(e)SCO reserved link_type 0x%2x", link_type); 583 break; 584 } 585 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 586 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 587 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 588 589 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 590 emit_event_audio_connected(status, sco_handle); 591 break; 592 } 593 594 case RFCOMM_EVENT_INCOMING_CONNECTION: 595 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 596 if (hsp_state != HSP_IDLE) return; 597 598 reverse_bd_addr(&packet[2], event_addr); 599 rfcomm_cid = little_endian_read_16(packet, 9); 600 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 601 hsp_state = HSP_W4_RFCOMM_CONNECTED; 602 rfcomm_accept_connection(rfcomm_cid); 603 break; 604 605 case RFCOMM_EVENT_CHANNEL_OPENED: 606 // printf("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 607 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 608 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 609 if (packet[2]) { 610 log_info("RFCOMM channel open failed, status %u", packet[2]); 611 hsp_state = HSP_IDLE; 612 hsp_hs_reset_state(); 613 } else { 614 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 615 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 616 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 617 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 618 rfcomm_event_channel_opened_get_bd_addr(packet, remote); 619 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", rfcomm_cid, mtu, rfcomm_handle); 620 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 621 } 622 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 623 break; 624 625 case RFCOMM_EVENT_CAN_SEND_NOW: 626 hsp_run(); 627 break; 628 629 case HCI_EVENT_DISCONNECTION_COMPLETE: 630 handle = little_endian_read_16(packet,3); 631 if (handle == sco_handle){ 632 sco_handle = 0; 633 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 634 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 635 break; 636 } 637 if (handle == rfcomm_handle) { 638 rfcomm_handle = 0; 639 hsp_state = HSP_IDLE; 640 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 641 hsp_hs_reset_state(); 642 } 643 break; 644 645 case RFCOMM_EVENT_CHANNEL_CLOSED: 646 hsp_hs_reset_state(); 647 hsp_hs_callback(HCI_EVENT_PACKET, 0, packet, size); 648 break; 649 650 default: 651 break; 652 } 653 654 hsp_run(); 655 } 656 657 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 658 UNUSED(packet_type); // ok: handling own sdp events 659 UNUSED(channel); // ok: no channel 660 UNUSED(size); // ok: handling own sdp events 661 662 switch (hci_event_packet_get_type(packet)){ 663 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 664 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 665 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 666 break; 667 case SDP_EVENT_QUERY_COMPLETE: 668 if (channel_nr > 0){ 669 hsp_state = HSP_W4_RFCOMM_CONNECTED; 670 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr); 671 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 672 break; 673 } 674 hsp_hs_reset_state(); 675 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 676 if (sdp_event_query_complete_get_status(packet)){ 677 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 678 } else { 679 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 680 } 681 break; 682 } 683 } 684 685 void hsp_hs_send_button_press(void){ 686 if ((hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) || (hsp_state >= HSP_W4_RFCOMM_DISCONNECTED)) return; 687 hs_send_button_press = 1; 688 hsp_run(); 689 } 690