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 <string.h> 51 52 #include "bluetooth_sdp.h" 53 #include "btstack_debug.h" 54 #include "btstack_event.h" 55 #include "btstack_memory.h" 56 #include "btstack_run_loop.h" 57 #include "classic/core.h" 58 #include "classic/sdp_server.h" 59 #include "classic/sdp_client_rfcomm.h" 60 #include "classic/sdp_util.h" 61 #include "classic/sdp_client.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 hci_con_handle_t sco_handle; 86 static hci_con_handle_t rfcomm_handle; 87 88 static int hs_microphone_gain; 89 static int hs_speaker_gain; 90 91 static uint8_t hs_send_button_press; 92 static uint8_t wait_ok; 93 static uint8_t hs_accept_sco_connection; 94 95 static uint8_t hs_support_custom_indications; 96 static btstack_packet_callback_registration_t hci_event_callback_registration; 97 static uint8_t hsp_establish_audio_connection; 98 static uint8_t hsp_release_audio_connection; 99 100 static uint16_t hsp_hs_sco_packet_types; 101 102 typedef enum { 103 HSP_IDLE, 104 HSP_W2_SEND_SDP_QUERY, 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 btstack_context_callback_registration_t hsp_hs_handle_sdp_client_query_request; 124 125 static hsp_state_t hsp_state; 126 127 static void hsp_run(void); 128 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 129 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 130 131 static btstack_packet_handler_t hsp_hs_callback; 132 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 133 // ok: no code 134 UNUSED(packet_type); 135 UNUSED(channel); 136 UNUSED(event); 137 UNUSED(size); 138 } 139 140 void hsp_hs_register_packet_handler(btstack_packet_handler_t callback){ 141 if (callback == NULL){ 142 callback = &dummy_notify; 143 } 144 hsp_hs_callback = callback; 145 } 146 147 static void emit_event(uint8_t event_subtype, uint8_t value){ 148 if (!hsp_hs_callback) return; 149 uint8_t event[4]; 150 event[0] = HCI_EVENT_HSP_META; 151 event[1] = sizeof(event) - 2; 152 event[2] = event_subtype; 153 event[3] = value; // status 0 == OK 154 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 155 } 156 157 static void emit_ring_event(void){ 158 if (!hsp_hs_callback) return; 159 uint8_t event[3]; 160 event[0] = HCI_EVENT_HSP_META; 161 event[1] = sizeof(event) - 2; 162 event[2] = HSP_SUBEVENT_RING; 163 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 164 } 165 166 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 167 if (!hsp_hs_callback) return; 168 uint8_t event[6]; 169 event[0] = HCI_EVENT_HSP_META; 170 event[1] = sizeof(event) - 2; 171 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 172 event[3] = status; 173 little_endian_store_16(event, 4, handle); 174 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 175 } 176 177 // remote audio volume control 178 // AG +VGM=13 [0..15] ; HS AT+VGM=6 | AG OK 179 180 static int hsp_hs_send_str_over_rfcomm(uint16_t cid, const char * command){ 181 if (!rfcomm_can_send_packet_now(rfcomm_cid)) return 1; 182 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 183 if (err){ 184 log_info("rfcomm_send_internal -> error 0X%02x", err); 185 } 186 return err; 187 } 188 189 void hsp_hs_enable_custom_indications(int enable){ 190 hs_support_custom_indications = enable; 191 } 192 193 int hsp_hs_send_result(const char * result){ 194 if (!hs_support_custom_indications) return 1; 195 return hsp_hs_send_str_over_rfcomm(rfcomm_cid, result); 196 } 197 198 199 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){ 200 uint8_t* attribute; 201 de_create_sequence(service); 202 203 // 0x0000 "Service Record Handle" 204 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 205 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 206 207 // 0x0001 "Service Class ID List" 208 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 209 attribute = de_push_sequence(service); 210 { 211 // see Bluetooth Erratum #3507 212 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); // 0x1108 213 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_HS); // 0x1131 214 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); // 0x1203 215 } 216 de_pop_sequence(service, attribute); 217 218 // 0x0004 "Protocol Descriptor List" 219 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 220 attribute = de_push_sequence(service); 221 { 222 uint8_t* l2cpProtocol = de_push_sequence(attribute); 223 { 224 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 225 } 226 de_pop_sequence(attribute, l2cpProtocol); 227 228 uint8_t* rfcomm = de_push_sequence(attribute); 229 { 230 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 231 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 232 } 233 de_pop_sequence(attribute, rfcomm); 234 } 235 de_pop_sequence(service, attribute); 236 237 // 0x0005 "Public Browse Group" 238 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 239 attribute = de_push_sequence(service); 240 { 241 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 242 } 243 de_pop_sequence(service, attribute); 244 245 // 0x0009 "Bluetooth Profile Descriptor List" 246 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 247 attribute = de_push_sequence(service); 248 { 249 uint8_t *hsp_profile = de_push_sequence(attribute); 250 { 251 de_add_number(hsp_profile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 252 de_add_number(hsp_profile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 253 } 254 de_pop_sequence(attribute, hsp_profile); 255 } 256 de_pop_sequence(service, attribute); 257 258 // 0x0100 "Service Name" 259 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 260 if (name){ 261 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 262 } else { 263 de_add_data(service, DE_STRING, strlen(default_hsp_hs_service_name), (uint8_t *) default_hsp_hs_service_name); 264 } 265 266 // Remote audio volume control 267 de_add_number(service, DE_UINT, DE_SIZE_16, 0x030C); 268 de_add_number(service, DE_BOOL, DE_SIZE_8, have_remote_audio_control); 269 } 270 271 static void hsp_hs_reset_state(void){ 272 hsp_state = HSP_IDLE; 273 hs_microphone_gain = -1; 274 hs_speaker_gain = -1; 275 rfcomm_cid = 0; 276 channel_nr = 0; 277 sco_handle = HCI_CON_HANDLE_INVALID; 278 rfcomm_handle = HCI_CON_HANDLE_INVALID; 279 280 hs_send_button_press = 0; 281 wait_ok = 0; 282 hs_support_custom_indications = 0; 283 284 hs_accept_sco_connection = 0; 285 hsp_establish_audio_connection = 0; 286 hsp_release_audio_connection = 0; 287 } 288 289 void hsp_hs_init(uint8_t rfcomm_channel_nr){ 290 // register for HCI events 291 hci_event_callback_registration.callback = &packet_handler; 292 hci_add_event_handler(&hci_event_callback_registration); 293 294 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 295 296 hsp_hs_sco_packet_types = SCO_PACKET_TYPES_ALL; 297 hsp_hs_reset_state(); 298 } 299 300 void hsp_hs_deinit(void){ 301 (void)memset(remote, 0, 6); 302 (void)memset(&hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 303 (void)memset(&hsp_hs_handle_sdp_client_query_request, 0, sizeof(btstack_context_callback_registration_t)); 304 hsp_hs_callback = NULL; 305 } 306 307 static void hsp_hs_handle_start_sdp_client_query(void * context){ 308 UNUSED(context); 309 if (hsp_state != HSP_W2_SEND_SDP_QUERY) return; 310 311 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 312 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 313 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 314 } 315 316 void hsp_hs_connect(bd_addr_t bd_addr){ 317 if (hsp_state != HSP_IDLE) return; 318 319 (void)memcpy(remote, bd_addr, 6); 320 hsp_state = HSP_W2_SEND_SDP_QUERY; 321 hsp_hs_handle_sdp_client_query_request.callback = &hsp_hs_handle_start_sdp_client_query; 322 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 323 (void) sdp_client_register_query_callback(&hsp_hs_handle_sdp_client_query_request); 324 } 325 326 void hsp_hs_disconnect(void){ 327 hsp_hs_release_audio_connection(); 328 329 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 330 hsp_state = HSP_IDLE; 331 return; 332 } 333 334 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 335 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 336 return; 337 } 338 339 hsp_establish_audio_connection = 0; 340 rfcomm_disconnect(rfcomm_cid); 341 } 342 343 344 void hsp_hs_establish_audio_connection(void){ 345 switch (hsp_state){ 346 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 347 hsp_establish_audio_connection = 1; 348 hsp_state = HSP_W4_SCO_CONNECTED; 349 break; 350 case HSP_W4_RFCOMM_CONNECTED: 351 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 352 break; 353 default: 354 break; 355 } 356 hsp_run(); 357 } 358 359 void hsp_hs_release_audio_connection(void){ 360 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 361 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 362 hsp_release_audio_connection = 1; 363 hsp_run(); 364 } 365 366 void hsp_hs_set_microphone_gain(uint8_t gain){ 367 if (gain >15) { 368 log_info("Gain must be in interval [0..15], it is given %d", gain); 369 return; 370 } 371 hs_microphone_gain = gain; 372 hsp_run(); 373 } 374 375 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 376 void hsp_hs_set_speaker_gain(uint8_t gain){ 377 if (gain >15) { 378 log_info("Gain must be in interval [0..15], it is given %d", gain); 379 return; 380 } 381 hs_speaker_gain = gain; 382 hsp_run(); 383 } 384 385 static void hsp_run_handle_state(void){ 386 switch (hsp_state){ 387 case HSP_AUDIO_CONNECTION_ESTABLISHED: 388 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 389 390 if (hs_microphone_gain >= 0){ 391 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 392 rfcomm_request_can_send_now_event(rfcomm_cid); 393 return; 394 } 395 char buffer[20]; 396 snprintf(buffer, sizeof(buffer), "%s=%d\r", 397 HSP_HS_MICROPHONE_GAIN, hs_microphone_gain); 398 buffer[sizeof(buffer) - 1] = 0; 399 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 400 hs_microphone_gain = -1; 401 break; 402 } 403 404 if (hs_speaker_gain >= 0){ 405 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 406 rfcomm_request_can_send_now_event(rfcomm_cid); 407 return; 408 } 409 char buffer[20]; 410 snprintf(buffer, sizeof(buffer), "%s=%d\r", 411 HSP_HS_SPEAKER_GAIN, hs_speaker_gain); 412 buffer[sizeof(buffer) - 1] = 0; 413 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 414 hs_speaker_gain = -1; 415 break; 416 } 417 break; 418 case HSP_W4_RFCOMM_DISCONNECTED: 419 rfcomm_disconnect(rfcomm_cid); 420 break; 421 default: 422 break; 423 } 424 } 425 426 static void hsp_run(void){ 427 428 if (wait_ok) return; 429 430 if (hs_accept_sco_connection && hci_can_send_command_packet_now()){ 431 432 bool eSCO = hs_accept_sco_connection == 2; 433 hs_accept_sco_connection = 0; 434 435 log_info("HSP: sending hci_accept_connection_request."); 436 437 // pick packet types based on SCO link type (SCO vs. eSCO) 438 uint16_t packet_types; 439 if (eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(rfcomm_handle)){ 440 packet_types = 0x3F8; 441 } else { 442 packet_types = 0x0007; 443 } 444 445 // packet type override 446 packet_types &= hsp_hs_sco_packet_types; 447 448 // bits 6-9 are 'don't use' 449 packet_types ^= 0x03c0; 450 451 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 452 453 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 454 hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, 0xffff, sco_voice_setting, 0xff, packet_types); 455 return; 456 } 457 458 if (hsp_release_audio_connection){ 459 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 460 rfcomm_request_can_send_now_event(rfcomm_cid); 461 return; 462 } 463 hsp_release_audio_connection = 0; 464 wait_ok = 1; 465 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 466 return; 467 } 468 469 if (hsp_establish_audio_connection){ 470 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 471 rfcomm_request_can_send_now_event(rfcomm_cid); 472 return; 473 } 474 hsp_establish_audio_connection = 0; 475 wait_ok = 1; 476 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 477 return; 478 } 479 480 if (hs_send_button_press){ 481 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 482 rfcomm_request_can_send_now_event(rfcomm_cid); 483 return; 484 } 485 hs_send_button_press = 0; 486 wait_ok = 1; 487 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 488 return; 489 } 490 491 hsp_run_handle_state(); 492 } 493 494 495 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 496 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 497 if (packet_type == RFCOMM_DATA_PACKET){ 498 // skip over leading newline 499 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 500 size--; 501 packet++; 502 } 503 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 504 emit_ring_event(); 505 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 506 wait_ok = 0; 507 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 508 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 509 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 510 511 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 512 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 513 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 514 } else { 515 if (!hsp_hs_callback) return; 516 // strip trailing newline 517 while ((size > 0) && ((packet[size-1] == '\n') || (packet[size-1] == '\r'))){ 518 size--; 519 } 520 // add trailing \0 521 packet[size] = 0; 522 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 523 uint8_t * event = packet - 4; 524 event[0] = HCI_EVENT_HSP_META; 525 event[1] = size + 2; 526 event[2] = HSP_SUBEVENT_AG_INDICATION; 527 event[3] = size; 528 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+4); 529 } 530 hsp_run(); 531 return; 532 } 533 534 if (packet_type != HCI_EVENT_PACKET) return; 535 536 uint8_t event = hci_event_packet_get_type(packet); 537 bd_addr_t event_addr; 538 uint16_t handle; 539 switch (event) { 540 case HCI_EVENT_CONNECTION_REQUEST: 541 switch(hci_event_connection_request_get_link_type(packet)){ 542 case 0: // SCO 543 case 2: // eSCO 544 hci_event_connection_request_get_bd_addr(packet, event_addr); 545 if (bd_addr_cmp(event_addr, remote) == 0){ 546 if (hci_event_connection_request_get_link_type(packet) == 2){ 547 hs_accept_sco_connection = 2; 548 } else { 549 hs_accept_sco_connection = 1; 550 } 551 log_info("hs_accept_sco_connection %u", hs_accept_sco_connection); 552 } 553 break; 554 default: 555 break; 556 } 557 break; 558 559 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 560 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 561 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 562 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 563 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 564 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 565 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 566 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet); // measured in slots 567 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 568 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 569 570 if (status != 0){ 571 log_error("(e)SCO Connection failed, status %u", status); 572 emit_event_audio_connected(status, sco_handle); 573 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 574 break; 575 } 576 577 switch (link_type){ 578 case 0x00: 579 log_info("SCO Connection established."); 580 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 581 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 582 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 583 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 584 break; 585 case 0x02: 586 log_info("eSCO Connection established."); 587 break; 588 default: 589 log_error("(e)SCO reserved link_type 0x%2x", link_type); 590 break; 591 } 592 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 593 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 594 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, 595 hci_event_synchronous_connection_complete_get_air_mode(packet)); 596 597 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 598 emit_event_audio_connected(status, sco_handle); 599 break; 600 } 601 602 case RFCOMM_EVENT_INCOMING_CONNECTION: 603 if (hsp_state != HSP_IDLE) return; 604 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 605 rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 606 log_info("RFCOMM channel %u requested for %s", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr)); 607 hsp_state = HSP_W4_RFCOMM_CONNECTED; 608 rfcomm_accept_connection(rfcomm_cid); 609 break; 610 611 case RFCOMM_EVENT_CHANNEL_OPENED: 612 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 613 if (rfcomm_event_channel_opened_get_status(packet)) { 614 log_info("RFCOMM channel open failed, status %u", rfcomm_event_channel_opened_get_status(packet)); 615 hsp_state = HSP_IDLE; 616 hsp_hs_reset_state(); 617 } else { 618 rfcomm_event_channel_opened_get_bd_addr(packet, remote); 619 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 620 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 621 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 622 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", rfcomm_cid, mtu, rfcomm_handle); 623 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 624 } 625 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, rfcomm_event_channel_opened_get_status(packet)); 626 break; 627 628 case RFCOMM_EVENT_CAN_SEND_NOW: 629 hsp_run(); 630 break; 631 632 case HCI_EVENT_DISCONNECTION_COMPLETE: 633 handle = hci_event_disconnection_complete_get_connection_handle(packet); 634 if (handle == sco_handle){ 635 sco_handle = 0; 636 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 637 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 638 break; 639 } 640 break; 641 642 case RFCOMM_EVENT_CHANNEL_CLOSED: 643 hsp_state = HSP_IDLE; 644 hsp_hs_reset_state(); 645 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 646 break; 647 648 default: 649 break; 650 } 651 652 hsp_run(); 653 } 654 655 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 656 UNUSED(packet_type); // ok: handling own sdp events 657 UNUSED(channel); // ok: no channel 658 UNUSED(size); // ok: handling own sdp events 659 660 switch (hci_event_packet_get_type(packet)){ 661 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 662 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 663 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 664 break; 665 case SDP_EVENT_QUERY_COMPLETE: 666 if (channel_nr > 0){ 667 hsp_state = HSP_W4_RFCOMM_CONNECTED; 668 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr); 669 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 670 break; 671 } 672 hsp_hs_reset_state(); 673 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 674 if (sdp_event_query_complete_get_status(packet)){ 675 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 676 } else { 677 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 678 } 679 break; 680 default: 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 } 690 691 void hsp_hs_set_sco_packet_types(uint16_t packet_types){ 692 hsp_hs_sco_packet_types = packet_types; 693 } 694