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 = HCI_CON_HANDLE_INVALID; 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 hsp_establish_audio_connection = 0; 316 rfcomm_disconnect(rfcomm_cid); 317 } 318 319 320 void hsp_hs_establish_audio_connection(void){ 321 switch (hsp_state){ 322 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 323 hsp_establish_audio_connection = 1; 324 hsp_state = HSP_W4_SCO_CONNECTED; 325 break; 326 case HSP_W4_RFCOMM_CONNECTED: 327 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 328 break; 329 default: 330 break; 331 } 332 hsp_run(); 333 } 334 335 void hsp_hs_release_audio_connection(void){ 336 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 337 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 338 hsp_release_audio_connection = 1; 339 hsp_run(); 340 } 341 342 void hsp_hs_set_microphone_gain(uint8_t gain){ 343 if (gain >15) { 344 log_info("Gain must be in interval [0..15], it is given %d", gain); 345 return; 346 } 347 hs_microphone_gain = gain; 348 hsp_run(); 349 } 350 351 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 352 void hsp_hs_set_speaker_gain(uint8_t gain){ 353 if (gain >15) { 354 log_info("Gain must be in interval [0..15], it is given %d", gain); 355 return; 356 } 357 hs_speaker_gain = gain; 358 hsp_run(); 359 } 360 361 362 static void hsp_run(void){ 363 364 if (wait_ok) return; 365 366 if (hs_accept_sco_connection && hci_can_send_command_packet_now()){ 367 368 bool eSCO = hs_accept_sco_connection == 2; 369 hs_accept_sco_connection = 0; 370 371 log_info("HSP: sending hci_accept_connection_request."); 372 // remote supported feature eSCO is set if link type is eSCO 373 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 374 uint16_t max_latency; 375 uint8_t retransmission_effort; 376 uint16_t packet_types; 377 378 if (eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(rfcomm_handle)){ 379 max_latency = 0x000c; 380 retransmission_effort = 0x02; 381 packet_types = 0x388; 382 } else { 383 max_latency = 0xffff; 384 retransmission_effort = 0xff; 385 packet_types = 0x003f; 386 } 387 388 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 389 390 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 391 hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, max_latency, 392 sco_voice_setting, retransmission_effort, packet_types); 393 return; 394 } 395 396 if (hsp_release_audio_connection){ 397 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 398 rfcomm_request_can_send_now_event(rfcomm_cid); 399 return; 400 } 401 hsp_release_audio_connection = 0; 402 wait_ok = 1; 403 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 404 return; 405 } 406 407 if (hsp_establish_audio_connection){ 408 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 409 rfcomm_request_can_send_now_event(rfcomm_cid); 410 return; 411 } 412 hsp_establish_audio_connection = 0; 413 wait_ok = 1; 414 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 415 return; 416 } 417 418 if (hs_send_button_press){ 419 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 420 rfcomm_request_can_send_now_event(rfcomm_cid); 421 return; 422 } 423 hs_send_button_press = 0; 424 wait_ok = 1; 425 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 426 return; 427 } 428 429 switch (hsp_state){ 430 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 431 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 432 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 433 break; 434 435 case HSP_AUDIO_CONNECTION_ESTABLISHED: 436 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 437 438 if (hs_microphone_gain >= 0){ 439 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 440 rfcomm_request_can_send_now_event(rfcomm_cid); 441 return; 442 } 443 char buffer[20]; 444 sprintf(buffer, "%s=%d\r\n", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain); 445 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 446 hs_microphone_gain = -1; 447 break; 448 } 449 450 if (hs_speaker_gain >= 0){ 451 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 452 rfcomm_request_can_send_now_event(rfcomm_cid); 453 return; 454 } 455 char buffer[20]; 456 sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain); 457 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 458 hs_speaker_gain = -1; 459 break; 460 } 461 break; 462 case HSP_W4_RFCOMM_DISCONNECTED: 463 rfcomm_disconnect(rfcomm_cid); 464 break; 465 default: 466 break; 467 } 468 } 469 470 471 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 472 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 473 if (packet_type == RFCOMM_DATA_PACKET){ 474 // printf("packet_handler type RFCOMM_DATA_PACKET %u, packet[0] %x\n", packet_type, packet[0]); 475 // skip over leading newline 476 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 477 size--; 478 packet++; 479 } 480 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 481 emit_ring_event(); 482 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 483 wait_ok = 0; 484 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 485 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 486 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 487 488 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 489 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 490 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 491 } else { 492 if (!hsp_hs_callback) return; 493 // strip trailing newline 494 while ((size > 0) && ((packet[size-1] == '\n') || (packet[size-1] == '\r'))){ 495 size--; 496 } 497 // add trailing \0 498 packet[size] = 0; 499 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 500 uint8_t * event = packet - 4; 501 event[0] = HCI_EVENT_HSP_META; 502 event[1] = size + 2; 503 event[2] = HSP_SUBEVENT_AG_INDICATION; 504 event[3] = size; 505 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+4); 506 } 507 hsp_run(); 508 return; 509 } 510 511 if (packet_type != HCI_EVENT_PACKET) return; 512 513 uint8_t event = hci_event_packet_get_type(packet); 514 bd_addr_t event_addr; 515 uint16_t handle; 516 switch (event) { 517 case HCI_EVENT_CONNECTION_REQUEST: 518 switch(hci_event_connection_request_get_link_type(packet)){ 519 case 0: // SCO 520 case 2: // eSCO 521 hci_event_connection_request_get_bd_addr(packet, event_addr); 522 if (bd_addr_cmp(event_addr, remote) == 0){ 523 if (hci_event_connection_request_get_link_type(packet) == 2){ 524 hs_accept_sco_connection = 2; 525 } else { 526 hs_accept_sco_connection = 1; 527 } 528 log_info("hs_accept_sco_connection %u", hs_accept_sco_connection); 529 } 530 break; 531 default: 532 break; 533 } 534 break; 535 536 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 537 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 538 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 539 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 540 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 541 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 542 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 543 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet); // measured in slots 544 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 545 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 546 uint8_t air_mode = hci_event_synchronous_connection_complete_get_air_mode(packet); 547 548 if (status != 0){ 549 log_error("(e)SCO Connection failed, status %u", status); 550 emit_event_audio_connected(status, sco_handle); 551 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 552 break; 553 } 554 555 switch (link_type){ 556 case 0x00: 557 log_info("SCO Connection established."); 558 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 559 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 560 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 561 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 562 break; 563 case 0x02: 564 log_info("eSCO Connection established."); 565 break; 566 default: 567 log_error("(e)SCO reserved link_type 0x%2x", link_type); 568 break; 569 } 570 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 571 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 572 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 573 574 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 575 emit_event_audio_connected(status, sco_handle); 576 break; 577 } 578 579 case RFCOMM_EVENT_INCOMING_CONNECTION: 580 if (hsp_state != HSP_IDLE) return; 581 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 582 rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 583 log_info("RFCOMM channel %u requested for %s", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr)); 584 hsp_state = HSP_W4_RFCOMM_CONNECTED; 585 rfcomm_accept_connection(rfcomm_cid); 586 break; 587 588 case RFCOMM_EVENT_CHANNEL_OPENED: 589 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 590 if (rfcomm_event_channel_opened_get_status(packet)) { 591 log_info("RFCOMM channel open failed, status %u", rfcomm_event_channel_opened_get_status(packet)); 592 hsp_state = HSP_IDLE; 593 hsp_hs_reset_state(); 594 } else { 595 rfcomm_event_channel_opened_get_bd_addr(packet, remote); 596 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 597 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 598 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 599 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", rfcomm_cid, mtu, rfcomm_handle); 600 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 601 } 602 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, rfcomm_event_channel_opened_get_status(packet)); 603 break; 604 605 case RFCOMM_EVENT_CAN_SEND_NOW: 606 hsp_run(); 607 break; 608 609 case HCI_EVENT_DISCONNECTION_COMPLETE: 610 handle = hci_event_disconnection_complete_get_connection_handle(packet); 611 if (handle == sco_handle){ 612 sco_handle = 0; 613 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 614 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 615 break; 616 } 617 break; 618 619 case RFCOMM_EVENT_CHANNEL_CLOSED: 620 hsp_state = HSP_IDLE; 621 hsp_hs_reset_state(); 622 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 623 break; 624 625 default: 626 break; 627 } 628 629 hsp_run(); 630 } 631 632 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 633 UNUSED(packet_type); // ok: handling own sdp events 634 UNUSED(channel); // ok: no channel 635 UNUSED(size); // ok: handling own sdp events 636 637 switch (hci_event_packet_get_type(packet)){ 638 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 639 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 640 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 641 break; 642 case SDP_EVENT_QUERY_COMPLETE: 643 if (channel_nr > 0){ 644 hsp_state = HSP_W4_RFCOMM_CONNECTED; 645 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr); 646 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 647 break; 648 } 649 hsp_hs_reset_state(); 650 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 651 if (sdp_event_query_complete_get_status(packet)){ 652 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 653 } else { 654 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 655 } 656 break; 657 } 658 } 659 660 void hsp_hs_send_button_press(void){ 661 if ((hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) || (hsp_state >= HSP_W4_RFCOMM_DISCONNECTED)) return; 662 hs_send_button_press = 1; 663 hsp_run(); 664 } 665