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 = {0x04, 0x0C, 0xCE, 0xE4, 0x85, 0xD3}; 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 96 static uint8_t hs_support_custom_indications = 0; 97 static btstack_packet_callback_registration_t hci_event_callback_registration; 98 static uint8_t hsp_disconnect_rfcomm = 0; 99 static uint8_t hsp_establish_audio_connection = 0; 100 static uint8_t hsp_release_audio_connection = 0; 101 102 typedef enum { 103 HSP_IDLE, 104 HSP_SDP_QUERY_RFCOMM_CHANNEL, 105 HSP_W4_SDP_QUERY_COMPLETE, 106 HSP_W4_RFCOMM_CONNECTED, 107 108 HSP_RFCOMM_CONNECTION_ESTABLISHED, 109 110 HSP_W2_CONNECT_SCO, 111 HSP_W4_SCO_CONNECTED, 112 113 HSP_AUDIO_CONNECTION_ESTABLISHED, 114 115 HSP_W2_DISCONNECT_SCO, 116 HSP_W4_SCO_DISCONNECTED, 117 118 HSP_W2_DISCONNECT_RFCOMM, 119 HSP_W4_RFCOMM_DISCONNECTED, 120 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 121 } hsp_state_t; 122 123 static hsp_state_t hsp_state = HSP_IDLE; 124 125 static void hsp_run(void); 126 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 127 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 128 129 static btstack_packet_handler_t hsp_hs_callback; 130 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 131 // ok: no code 132 UNUSED(packet_type); 133 UNUSED(channel); 134 UNUSED(event); 135 UNUSED(size); 136 } 137 138 void hsp_hs_register_packet_handler(btstack_packet_handler_t callback){ 139 if (callback == NULL){ 140 callback = &dummy_notify; 141 } 142 hsp_hs_callback = callback; 143 } 144 145 static void emit_event(uint8_t event_subtype, uint8_t value){ 146 if (!hsp_hs_callback) return; 147 uint8_t event[4]; 148 event[0] = HCI_EVENT_HSP_META; 149 event[1] = sizeof(event) - 2; 150 event[2] = event_subtype; 151 event[3] = value; // status 0 == OK 152 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 153 } 154 155 static void emit_ring_event(void){ 156 if (!hsp_hs_callback) return; 157 uint8_t event[3]; 158 event[0] = HCI_EVENT_HSP_META; 159 event[1] = sizeof(event) - 2; 160 event[2] = HSP_SUBEVENT_RING; 161 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 162 } 163 164 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 165 if (!hsp_hs_callback) return; 166 uint8_t event[6]; 167 event[0] = HCI_EVENT_HSP_META; 168 event[1] = sizeof(event) - 2; 169 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 170 event[3] = status; 171 little_endian_store_16(event, 4, handle); 172 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 173 } 174 175 // remote audio volume control 176 // AG +VGM=13 [0..15] ; HS AT+VGM=6 | AG OK 177 178 static int hsp_hs_send_str_over_rfcomm(uint16_t cid, const char * command){ 179 if (!rfcomm_can_send_packet_now(rfcomm_cid)) return 1; 180 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 181 if (err){ 182 log_info("rfcomm_send_internal -> error 0X%02x", err); 183 } 184 return err; 185 } 186 187 void hsp_hs_enable_custom_indications(int enable){ 188 hs_support_custom_indications = enable; 189 } 190 191 int hsp_hs_send_result(const char * result){ 192 if (!hs_support_custom_indications) return 1; 193 return hsp_hs_send_str_over_rfcomm(rfcomm_cid, result); 194 } 195 196 197 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){ 198 uint8_t* attribute; 199 de_create_sequence(service); 200 201 // 0x0000 "Service Record Handle" 202 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 203 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 204 205 // 0x0001 "Service Class ID List" 206 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 207 attribute = de_push_sequence(service); 208 { 209 // see Bluetooth Erratum #3507 210 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); // 0x1108 211 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_HS); // 0x1131 212 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); // 0x1203 213 } 214 de_pop_sequence(service, attribute); 215 216 // 0x0004 "Protocol Descriptor List" 217 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 218 attribute = de_push_sequence(service); 219 { 220 uint8_t* l2cpProtocol = de_push_sequence(attribute); 221 { 222 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 223 } 224 de_pop_sequence(attribute, l2cpProtocol); 225 226 uint8_t* rfcomm = de_push_sequence(attribute); 227 { 228 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 229 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 230 } 231 de_pop_sequence(attribute, rfcomm); 232 } 233 de_pop_sequence(service, attribute); 234 235 // 0x0005 "Public Browse Group" 236 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 237 attribute = de_push_sequence(service); 238 { 239 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 240 } 241 de_pop_sequence(service, attribute); 242 243 // 0x0009 "Bluetooth Profile Descriptor List" 244 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 245 attribute = de_push_sequence(service); 246 { 247 uint8_t *hsp_profile = de_push_sequence(attribute); 248 { 249 de_add_number(hsp_profile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 250 de_add_number(hsp_profile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 251 } 252 de_pop_sequence(attribute, hsp_profile); 253 } 254 de_pop_sequence(service, attribute); 255 256 // 0x0100 "Service Name" 257 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 258 if (name){ 259 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 260 } else { 261 de_add_data(service, DE_STRING, strlen(default_hsp_hs_service_name), (uint8_t *) default_hsp_hs_service_name); 262 } 263 264 // Remote audio volume control 265 de_add_number(service, DE_UINT, DE_SIZE_16, 0x030C); 266 de_add_number(service, DE_BOOL, DE_SIZE_8, have_remote_audio_control); 267 } 268 269 static void hsp_hs_reset_state(void){ 270 hsp_state = HSP_IDLE; 271 hs_microphone_gain = -1; 272 hs_speaker_gain = -1; 273 274 hs_send_button_press = 0; 275 wait_ok = 0; 276 hs_support_custom_indications = 0; 277 278 hsp_disconnect_rfcomm = 0; 279 hsp_establish_audio_connection = 0; 280 hsp_release_audio_connection = 0; 281 } 282 283 void hsp_hs_init(uint8_t rfcomm_channel_nr){ 284 // register for HCI events 285 hci_event_callback_registration.callback = &packet_handler; 286 hci_add_event_handler(&hci_event_callback_registration); 287 288 rfcomm_init(); 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 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 (hsp_release_audio_connection){ 372 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 373 rfcomm_request_can_send_now_event(rfcomm_cid); 374 return; 375 } 376 hsp_release_audio_connection = 0; 377 wait_ok = 1; 378 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 379 return; 380 } 381 382 if (hsp_disconnect_rfcomm){ 383 hsp_disconnect_rfcomm = 0; 384 hsp_establish_audio_connection = 0; 385 rfcomm_disconnect(rfcomm_cid); 386 return; 387 } 388 389 if (hsp_establish_audio_connection){ 390 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 391 rfcomm_request_can_send_now_event(rfcomm_cid); 392 return; 393 } 394 hsp_establish_audio_connection = 0; 395 wait_ok = 1; 396 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 397 return; 398 } 399 400 if (hs_send_button_press){ 401 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 402 rfcomm_request_can_send_now_event(rfcomm_cid); 403 return; 404 } 405 hs_send_button_press = 0; 406 wait_ok = 1; 407 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 408 return; 409 } 410 411 switch (hsp_state){ 412 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 413 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 414 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 415 break; 416 417 case HSP_AUDIO_CONNECTION_ESTABLISHED: 418 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 419 420 if (hs_microphone_gain >= 0){ 421 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 422 rfcomm_request_can_send_now_event(rfcomm_cid); 423 return; 424 } 425 char buffer[20]; 426 sprintf(buffer, "%s=%d\r\n", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain); 427 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 428 hs_microphone_gain = -1; 429 break; 430 } 431 432 if (hs_speaker_gain >= 0){ 433 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 434 rfcomm_request_can_send_now_event(rfcomm_cid); 435 return; 436 } 437 char buffer[20]; 438 sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain); 439 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 440 hs_speaker_gain = -1; 441 break; 442 } 443 break; 444 case HSP_W4_RFCOMM_DISCONNECTED: 445 rfcomm_disconnect(rfcomm_cid); 446 break; 447 default: 448 break; 449 } 450 } 451 452 453 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 454 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 455 456 // printf("packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 457 if (packet_type == RFCOMM_DATA_PACKET){ 458 // skip over leading newline 459 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 460 size--; 461 packet++; 462 } 463 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 464 emit_ring_event(); 465 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 466 wait_ok = 0; 467 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 468 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 469 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 470 471 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 472 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 473 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 474 } else { 475 if (!hsp_hs_callback) return; 476 // strip trailing newline 477 while (size > 0 && (packet[size-1] == '\n' || packet[size-1] == '\r')){ 478 size--; 479 } 480 // add trailing \0 481 packet[size] = 0; 482 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 483 uint8_t * event = packet - 4; 484 event[0] = HCI_EVENT_HSP_META; 485 event[1] = size + 2; 486 event[2] = HSP_SUBEVENT_AG_INDICATION; 487 event[3] = size; 488 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+4); 489 } 490 hsp_run(); 491 return; 492 } 493 494 if (packet_type != HCI_EVENT_PACKET) return; 495 uint8_t event = hci_event_packet_get_type(packet); 496 bd_addr_t event_addr; 497 uint16_t handle; 498 499 switch (event) { 500 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 501 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 502 int index = 2; 503 uint8_t status = packet[index++]; 504 sco_handle = little_endian_read_16(packet, index); 505 index+=2; 506 bd_addr_t address; 507 memcpy(address, &packet[index], 6); 508 index+=6; 509 uint8_t link_type = packet[index++]; 510 uint8_t transmission_interval = packet[index++]; // measured in slots 511 uint8_t retransmission_interval = packet[index++];// measured in slots 512 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 513 index+=2; 514 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 515 index+=2; 516 uint8_t air_mode = packet[index]; 517 518 if (status != 0){ 519 log_error("(e)SCO Connection failed, status %u", status); 520 emit_event_audio_connected(status, sco_handle); 521 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 522 break; 523 } 524 525 switch (link_type){ 526 case 0x00: 527 log_info("SCO Connection established."); 528 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 529 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 530 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 531 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 532 break; 533 case 0x02: 534 log_info("eSCO Connection established."); 535 break; 536 default: 537 log_error("(e)SCO reserved link_type 0x%2x", link_type); 538 break; 539 } 540 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 541 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 542 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 543 544 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 545 emit_event_audio_connected(status, sco_handle); 546 break; 547 } 548 549 case RFCOMM_EVENT_INCOMING_CONNECTION: 550 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 551 if (hsp_state != HSP_IDLE) return; 552 553 reverse_bd_addr(&packet[2], event_addr); 554 rfcomm_cid = little_endian_read_16(packet, 9); 555 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 556 hsp_state = HSP_W4_RFCOMM_CONNECTED; 557 rfcomm_accept_connection(rfcomm_cid); 558 break; 559 560 case RFCOMM_EVENT_CHANNEL_OPENED: 561 // printf("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 562 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 563 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 564 if (packet[2]) { 565 log_info("RFCOMM channel open failed, status %u", packet[2]); 566 hsp_state = HSP_IDLE; 567 hsp_hs_reset_state(); 568 } else { 569 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 570 rfcomm_handle = little_endian_read_16(packet, 9); 571 rfcomm_cid = little_endian_read_16(packet, 12); 572 mtu = little_endian_read_16(packet, 14); 573 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", rfcomm_cid, mtu, rfcomm_handle); 574 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 575 } 576 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 577 break; 578 579 case RFCOMM_EVENT_CAN_SEND_NOW: 580 hsp_run(); 581 break; 582 583 case HCI_EVENT_DISCONNECTION_COMPLETE: 584 handle = little_endian_read_16(packet,3); 585 if (handle == sco_handle){ 586 sco_handle = 0; 587 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 588 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 589 break; 590 } 591 if (handle == rfcomm_handle) { 592 rfcomm_handle = 0; 593 hsp_state = HSP_IDLE; 594 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 595 hsp_hs_reset_state(); 596 } 597 break; 598 599 case RFCOMM_EVENT_CHANNEL_CLOSED: 600 hsp_hs_reset_state(); 601 hsp_hs_callback(HCI_EVENT_PACKET, 0, packet, size); 602 break; 603 604 default: 605 break; 606 } 607 608 hsp_run(); 609 } 610 611 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 612 UNUSED(packet_type); // ok: handling own sdp events 613 UNUSED(channel); // ok: no channel 614 UNUSED(size); // ok: handling own sdp events 615 616 switch (hci_event_packet_get_type(packet)){ 617 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 618 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 619 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 620 break; 621 case SDP_EVENT_QUERY_COMPLETE: 622 if (channel_nr > 0){ 623 hsp_state = HSP_W4_RFCOMM_CONNECTED; 624 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr); 625 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 626 break; 627 } 628 hsp_hs_reset_state(); 629 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 630 if (sdp_event_query_complete_get_status(packet)){ 631 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 632 } else { 633 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 634 } 635 break; 636 } 637 } 638 639 void hsp_hs_send_button_press(void){ 640 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED || hsp_state >= HSP_W4_RFCOMM_DISCONNECTED) return; 641 hs_send_button_press = 1; 642 hsp_run(); 643 } 644