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_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 289 290 hsp_hs_reset_state(); 291 } 292 293 294 void hsp_hs_connect(bd_addr_t bd_addr){ 295 if (hsp_state != HSP_IDLE) return; 296 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 297 memcpy(remote, bd_addr, 6); 298 hsp_run(); 299 } 300 301 void hsp_hs_disconnect(void){ 302 hsp_hs_release_audio_connection(); 303 304 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 305 hsp_state = HSP_IDLE; 306 return; 307 } 308 309 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 310 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 311 return; 312 } 313 314 if (hsp_state < HSP_W4_SCO_CONNECTED){ 315 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 316 return; 317 } 318 319 hsp_disconnect_rfcomm = 1; 320 hsp_run(); 321 } 322 323 324 void hsp_hs_establish_audio_connection(void){ 325 switch (hsp_state){ 326 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 327 hsp_establish_audio_connection = 1; 328 hsp_state = HSP_W4_SCO_CONNECTED; 329 break; 330 case HSP_W4_RFCOMM_CONNECTED: 331 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 332 break; 333 default: 334 break; 335 } 336 hsp_run(); 337 } 338 339 void hsp_hs_release_audio_connection(void){ 340 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 341 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 342 hsp_release_audio_connection = 1; 343 hsp_run(); 344 } 345 346 void hsp_hs_set_microphone_gain(uint8_t gain){ 347 if (gain >15) { 348 log_info("Gain must be in interval [0..15], it is given %d", gain); 349 return; 350 } 351 hs_microphone_gain = gain; 352 hsp_run(); 353 } 354 355 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 356 void hsp_hs_set_speaker_gain(uint8_t gain){ 357 if (gain >15) { 358 log_info("Gain must be in interval [0..15], it is given %d", gain); 359 return; 360 } 361 hs_speaker_gain = gain; 362 hsp_run(); 363 } 364 365 366 static void hsp_run(void){ 367 368 if (wait_ok) return; 369 370 if (hsp_release_audio_connection){ 371 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 372 rfcomm_request_can_send_now_event(rfcomm_cid); 373 return; 374 } 375 hsp_release_audio_connection = 0; 376 wait_ok = 1; 377 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 378 return; 379 } 380 381 if (hsp_disconnect_rfcomm){ 382 hsp_disconnect_rfcomm = 0; 383 hsp_establish_audio_connection = 0; 384 rfcomm_disconnect(rfcomm_cid); 385 return; 386 } 387 388 if (hsp_establish_audio_connection){ 389 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 390 rfcomm_request_can_send_now_event(rfcomm_cid); 391 return; 392 } 393 hsp_establish_audio_connection = 0; 394 wait_ok = 1; 395 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 396 return; 397 } 398 399 if (hs_send_button_press){ 400 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 401 rfcomm_request_can_send_now_event(rfcomm_cid); 402 return; 403 } 404 hs_send_button_press = 0; 405 wait_ok = 1; 406 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 407 return; 408 } 409 410 switch (hsp_state){ 411 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 412 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 413 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 414 break; 415 416 case HSP_AUDIO_CONNECTION_ESTABLISHED: 417 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 418 419 if (hs_microphone_gain >= 0){ 420 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 421 rfcomm_request_can_send_now_event(rfcomm_cid); 422 return; 423 } 424 char buffer[20]; 425 sprintf(buffer, "%s=%d\r\n", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain); 426 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 427 hs_microphone_gain = -1; 428 break; 429 } 430 431 if (hs_speaker_gain >= 0){ 432 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 433 rfcomm_request_can_send_now_event(rfcomm_cid); 434 return; 435 } 436 char buffer[20]; 437 sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain); 438 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 439 hs_speaker_gain = -1; 440 break; 441 } 442 break; 443 case HSP_W4_RFCOMM_DISCONNECTED: 444 rfcomm_disconnect(rfcomm_cid); 445 break; 446 default: 447 break; 448 } 449 } 450 451 452 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 453 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 454 455 // printf("packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 456 if (packet_type == RFCOMM_DATA_PACKET){ 457 // skip over leading newline 458 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 459 size--; 460 packet++; 461 } 462 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 463 emit_ring_event(); 464 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 465 wait_ok = 0; 466 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 467 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 468 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 469 470 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 471 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 472 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 473 } else { 474 if (!hsp_hs_callback) return; 475 // strip trailing newline 476 while (size > 0 && (packet[size-1] == '\n' || packet[size-1] == '\r')){ 477 size--; 478 } 479 // add trailing \0 480 packet[size] = 0; 481 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 482 uint8_t * event = packet - 4; 483 event[0] = HCI_EVENT_HSP_META; 484 event[1] = size + 2; 485 event[2] = HSP_SUBEVENT_AG_INDICATION; 486 event[3] = size; 487 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+4); 488 } 489 hsp_run(); 490 return; 491 } 492 493 if (packet_type != HCI_EVENT_PACKET) return; 494 uint8_t event = hci_event_packet_get_type(packet); 495 bd_addr_t event_addr; 496 uint16_t handle; 497 498 switch (event) { 499 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 500 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 501 int index = 2; 502 uint8_t status = packet[index++]; 503 sco_handle = little_endian_read_16(packet, index); 504 index+=2; 505 bd_addr_t address; 506 memcpy(address, &packet[index], 6); 507 index+=6; 508 uint8_t link_type = packet[index++]; 509 uint8_t transmission_interval = packet[index++]; // measured in slots 510 uint8_t retransmission_interval = packet[index++];// measured in slots 511 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 512 index+=2; 513 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 514 index+=2; 515 uint8_t air_mode = packet[index]; 516 517 if (status != 0){ 518 log_error("(e)SCO Connection failed, status %u", status); 519 emit_event_audio_connected(status, sco_handle); 520 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 521 break; 522 } 523 524 switch (link_type){ 525 case 0x00: 526 log_info("SCO Connection established."); 527 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 528 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 529 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 530 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 531 break; 532 case 0x02: 533 log_info("eSCO Connection established."); 534 break; 535 default: 536 log_error("(e)SCO reserved link_type 0x%2x", link_type); 537 break; 538 } 539 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 540 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 541 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 542 543 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 544 emit_event_audio_connected(status, sco_handle); 545 break; 546 } 547 548 case RFCOMM_EVENT_INCOMING_CONNECTION: 549 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 550 if (hsp_state != HSP_IDLE) return; 551 552 reverse_bd_addr(&packet[2], event_addr); 553 rfcomm_cid = little_endian_read_16(packet, 9); 554 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 555 hsp_state = HSP_W4_RFCOMM_CONNECTED; 556 rfcomm_accept_connection(rfcomm_cid); 557 break; 558 559 case RFCOMM_EVENT_CHANNEL_OPENED: 560 // printf("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 561 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 562 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 563 if (packet[2]) { 564 log_info("RFCOMM channel open failed, status %u", packet[2]); 565 hsp_state = HSP_IDLE; 566 hsp_hs_reset_state(); 567 } else { 568 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 569 rfcomm_handle = little_endian_read_16(packet, 9); 570 rfcomm_cid = little_endian_read_16(packet, 12); 571 mtu = little_endian_read_16(packet, 14); 572 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", rfcomm_cid, mtu, rfcomm_handle); 573 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 574 } 575 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]); 576 break; 577 578 case RFCOMM_EVENT_CAN_SEND_NOW: 579 hsp_run(); 580 break; 581 582 case HCI_EVENT_DISCONNECTION_COMPLETE: 583 handle = little_endian_read_16(packet,3); 584 if (handle == sco_handle){ 585 sco_handle = 0; 586 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 587 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 588 break; 589 } 590 if (handle == rfcomm_handle) { 591 rfcomm_handle = 0; 592 hsp_state = HSP_IDLE; 593 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 594 hsp_hs_reset_state(); 595 } 596 break; 597 598 case RFCOMM_EVENT_CHANNEL_CLOSED: 599 hsp_hs_reset_state(); 600 hsp_hs_callback(HCI_EVENT_PACKET, 0, packet, size); 601 break; 602 603 default: 604 break; 605 } 606 607 hsp_run(); 608 } 609 610 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 611 UNUSED(packet_type); // ok: handling own sdp events 612 UNUSED(channel); // ok: no channel 613 UNUSED(size); // ok: handling own sdp events 614 615 switch (hci_event_packet_get_type(packet)){ 616 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 617 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 618 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 619 break; 620 case SDP_EVENT_QUERY_COMPLETE: 621 if (channel_nr > 0){ 622 hsp_state = HSP_W4_RFCOMM_CONNECTED; 623 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr); 624 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 625 break; 626 } 627 hsp_hs_reset_state(); 628 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 629 if (sdp_event_query_complete_get_status(packet)){ 630 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 631 } else { 632 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 633 } 634 break; 635 } 636 } 637 638 void hsp_hs_send_button_press(void){ 639 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED || hsp_state >= HSP_W4_RFCOMM_DISCONNECTED) return; 640 hs_send_button_press = 1; 641 hsp_run(); 642 } 643