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 <string.h> 50 51 #include "bluetooth_sdp.h" 52 #include "btstack_debug.h" 53 #include "btstack_event.h" 54 #include "btstack_memory.h" 55 #include "btstack_run_loop.h" 56 #include "classic/core.h" 57 #include "classic/sdp_server.h" 58 #include "classic/sdp_client_rfcomm.h" 59 #include "classic/sdp_util.h" 60 #include "classic/sdp_client.h" 61 #include "hci.h" 62 #include "hci_cmd.h" 63 #include "hci_dump.h" 64 #include "hsp_hs.h" 65 #include "l2cap.h" 66 67 #define HSP_AG_OK "OK" 68 #define HSP_AG_ERROR "ERROR" 69 #define HSP_AG_RING "RING" 70 #define HSP_MICROPHONE_GAIN "+VGM=" 71 #define HSP_SPEAKER_GAIN "+VGS=" 72 73 #define HSP_HS_AT_CKPD "AT+CKPD=200\r\n" 74 #define HSP_HS_MICROPHONE_GAIN "AT+VGM" 75 #define HSP_HS_SPEAKER_GAIN "AT+VGS" 76 77 static const char default_hsp_hs_service_name[] = "Headset"; 78 79 static bd_addr_t remote; 80 static uint8_t channel_nr = 0; 81 82 static uint16_t mtu; 83 static uint16_t rfcomm_cid = 0; 84 static hci_con_handle_t sco_handle; 85 static hci_con_handle_t rfcomm_handle; 86 87 static int hs_microphone_gain; 88 static int hs_speaker_gain; 89 90 static uint8_t hs_send_button_press; 91 static uint8_t wait_ok; 92 static uint8_t hs_accept_sco_connection; 93 94 static uint8_t hs_support_custom_indications; 95 static btstack_packet_callback_registration_t hci_event_callback_registration; 96 static uint8_t hsp_establish_audio_connection; 97 static uint8_t hsp_release_audio_connection; 98 99 static uint16_t hsp_hs_sco_packet_types; 100 101 typedef enum { 102 HSP_IDLE, 103 HSP_W2_SEND_SDP_QUERY, 104 HSP_W4_SDP_QUERY_COMPLETE, 105 HSP_W4_RFCOMM_CONNECTED, 106 107 HSP_RFCOMM_CONNECTION_ESTABLISHED, 108 109 HSP_W2_CONNECT_SCO, 110 HSP_W4_SCO_CONNECTED, 111 112 HSP_AUDIO_CONNECTION_ESTABLISHED, 113 114 HSP_W2_DISCONNECT_SCO, 115 HSP_W4_SCO_DISCONNECTED, 116 117 HSP_W2_DISCONNECT_RFCOMM, 118 HSP_W4_RFCOMM_DISCONNECTED, 119 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 120 } hsp_state_t; 121 122 static btstack_context_callback_registration_t hsp_hs_handle_sdp_client_query_request; 123 124 static hsp_state_t hsp_state; 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 rfcomm_cid = 0; 275 channel_nr = 0; 276 sco_handle = HCI_CON_HANDLE_INVALID; 277 rfcomm_handle = HCI_CON_HANDLE_INVALID; 278 279 hs_send_button_press = 0; 280 wait_ok = 0; 281 hs_support_custom_indications = 0; 282 283 hs_accept_sco_connection = 0; 284 hsp_establish_audio_connection = 0; 285 hsp_release_audio_connection = 0; 286 } 287 288 void hsp_hs_init(uint8_t rfcomm_channel_nr){ 289 // register for HCI events 290 hci_event_callback_registration.callback = &packet_handler; 291 hci_add_event_handler(&hci_event_callback_registration); 292 293 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 294 295 hsp_hs_sco_packet_types = SCO_PACKET_TYPES_ALL; 296 hsp_hs_reset_state(); 297 } 298 299 void hsp_hs_deinit(void){ 300 (void)memset(remote, 0, 6); 301 (void)memset(&hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 302 (void)memset(&hsp_hs_handle_sdp_client_query_request, 0, sizeof(btstack_context_callback_registration_t)); 303 hsp_hs_callback = NULL; 304 } 305 306 static void hsp_hs_handle_start_sdp_client_query(void * context){ 307 UNUSED(context); 308 if (hsp_state != HSP_W2_SEND_SDP_QUERY) return; 309 310 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 311 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 312 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 313 } 314 315 void hsp_hs_connect(bd_addr_t bd_addr){ 316 if (hsp_state != HSP_IDLE) return; 317 318 (void)memcpy(remote, bd_addr, 6); 319 hsp_state = HSP_W2_SEND_SDP_QUERY; 320 hsp_hs_handle_sdp_client_query_request.callback = &hsp_hs_handle_start_sdp_client_query; 321 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 322 (void) sdp_client_register_query_callback(&hsp_hs_handle_sdp_client_query_request); 323 } 324 325 void hsp_hs_disconnect(void){ 326 hsp_hs_release_audio_connection(); 327 328 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 329 hsp_state = HSP_IDLE; 330 return; 331 } 332 333 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 334 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 335 return; 336 } 337 338 hsp_establish_audio_connection = 0; 339 rfcomm_disconnect(rfcomm_cid); 340 } 341 342 343 void hsp_hs_establish_audio_connection(void){ 344 switch (hsp_state){ 345 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 346 hsp_establish_audio_connection = 1; 347 hsp_state = HSP_W4_SCO_CONNECTED; 348 break; 349 case HSP_W4_RFCOMM_CONNECTED: 350 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 351 break; 352 default: 353 break; 354 } 355 hsp_run(); 356 } 357 358 void hsp_hs_release_audio_connection(void){ 359 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 360 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 361 hsp_release_audio_connection = 1; 362 hsp_run(); 363 } 364 365 void hsp_hs_set_microphone_gain(uint8_t gain){ 366 if (gain >15) { 367 log_info("Gain must be in interval [0..15], it is given %d", gain); 368 return; 369 } 370 hs_microphone_gain = gain; 371 hsp_run(); 372 } 373 374 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 375 void hsp_hs_set_speaker_gain(uint8_t gain){ 376 if (gain >15) { 377 log_info("Gain must be in interval [0..15], it is given %d", gain); 378 return; 379 } 380 hs_speaker_gain = gain; 381 hsp_run(); 382 } 383 384 static void hsp_run_handle_state(void){ 385 switch (hsp_state){ 386 case HSP_AUDIO_CONNECTION_ESTABLISHED: 387 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 388 389 if (hs_microphone_gain >= 0){ 390 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 391 rfcomm_request_can_send_now_event(rfcomm_cid); 392 return; 393 } 394 char buffer[20]; 395 sprintf(buffer, "%s=%d\r\n", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain); 396 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 397 hs_microphone_gain = -1; 398 break; 399 } 400 401 if (hs_speaker_gain >= 0){ 402 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 403 rfcomm_request_can_send_now_event(rfcomm_cid); 404 return; 405 } 406 char buffer[20]; 407 sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain); 408 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 409 hs_speaker_gain = -1; 410 break; 411 } 412 break; 413 case HSP_W4_RFCOMM_DISCONNECTED: 414 rfcomm_disconnect(rfcomm_cid); 415 break; 416 default: 417 break; 418 } 419 } 420 421 static void hsp_run(void){ 422 423 if (wait_ok) return; 424 425 if (hs_accept_sco_connection && hci_can_send_command_packet_now()){ 426 427 bool eSCO = hs_accept_sco_connection == 2; 428 hs_accept_sco_connection = 0; 429 430 log_info("HSP: sending hci_accept_connection_request."); 431 432 // pick packet types based on SCO link type (SCO vs. eSCO) 433 uint16_t packet_types; 434 if (eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(rfcomm_handle)){ 435 packet_types = 0x3F8; 436 } else { 437 packet_types = 0x0007; 438 } 439 440 // packet type override 441 packet_types &= hsp_hs_sco_packet_types; 442 443 // bits 6-9 are 'don't use' 444 packet_types ^= 0x03c0; 445 446 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 447 448 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 449 hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, 0xffff, sco_voice_setting, 0xff, packet_types); 450 return; 451 } 452 453 if (hsp_release_audio_connection){ 454 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 455 rfcomm_request_can_send_now_event(rfcomm_cid); 456 return; 457 } 458 hsp_release_audio_connection = 0; 459 wait_ok = 1; 460 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 461 return; 462 } 463 464 if (hsp_establish_audio_connection){ 465 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 466 rfcomm_request_can_send_now_event(rfcomm_cid); 467 return; 468 } 469 hsp_establish_audio_connection = 0; 470 wait_ok = 1; 471 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 472 return; 473 } 474 475 if (hs_send_button_press){ 476 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 477 rfcomm_request_can_send_now_event(rfcomm_cid); 478 return; 479 } 480 hs_send_button_press = 0; 481 wait_ok = 1; 482 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 483 return; 484 } 485 486 hsp_run_handle_state(); 487 } 488 489 490 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 491 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 492 if (packet_type == RFCOMM_DATA_PACKET){ 493 // skip over leading newline 494 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 495 size--; 496 packet++; 497 } 498 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 499 emit_ring_event(); 500 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 501 wait_ok = 0; 502 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 503 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 504 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 505 506 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 507 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 508 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 509 } else { 510 if (!hsp_hs_callback) return; 511 // strip trailing newline 512 while ((size > 0) && ((packet[size-1] == '\n') || (packet[size-1] == '\r'))){ 513 size--; 514 } 515 // add trailing \0 516 packet[size] = 0; 517 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 518 uint8_t * event = packet - 4; 519 event[0] = HCI_EVENT_HSP_META; 520 event[1] = size + 2; 521 event[2] = HSP_SUBEVENT_AG_INDICATION; 522 event[3] = size; 523 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+4); 524 } 525 hsp_run(); 526 return; 527 } 528 529 if (packet_type != HCI_EVENT_PACKET) return; 530 531 uint8_t event = hci_event_packet_get_type(packet); 532 bd_addr_t event_addr; 533 uint16_t handle; 534 switch (event) { 535 case HCI_EVENT_CONNECTION_REQUEST: 536 switch(hci_event_connection_request_get_link_type(packet)){ 537 case 0: // SCO 538 case 2: // eSCO 539 hci_event_connection_request_get_bd_addr(packet, event_addr); 540 if (bd_addr_cmp(event_addr, remote) == 0){ 541 if (hci_event_connection_request_get_link_type(packet) == 2){ 542 hs_accept_sco_connection = 2; 543 } else { 544 hs_accept_sco_connection = 1; 545 } 546 log_info("hs_accept_sco_connection %u", hs_accept_sco_connection); 547 } 548 break; 549 default: 550 break; 551 } 552 break; 553 554 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 555 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 556 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 557 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 558 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 559 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 560 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 561 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet); // measured in slots 562 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 563 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 564 565 if (status != 0){ 566 log_error("(e)SCO Connection failed, status %u", status); 567 emit_event_audio_connected(status, sco_handle); 568 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 569 break; 570 } 571 572 switch (link_type){ 573 case 0x00: 574 log_info("SCO Connection established."); 575 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 576 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 577 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 578 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 579 break; 580 case 0x02: 581 log_info("eSCO Connection established."); 582 break; 583 default: 584 log_error("(e)SCO reserved link_type 0x%2x", link_type); 585 break; 586 } 587 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 588 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 589 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, 590 hci_event_synchronous_connection_complete_get_air_mode(packet)); 591 592 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 593 emit_event_audio_connected(status, sco_handle); 594 break; 595 } 596 597 case RFCOMM_EVENT_INCOMING_CONNECTION: 598 if (hsp_state != HSP_IDLE) return; 599 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 600 rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 601 log_info("RFCOMM channel %u requested for %s", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr)); 602 hsp_state = HSP_W4_RFCOMM_CONNECTED; 603 rfcomm_accept_connection(rfcomm_cid); 604 break; 605 606 case RFCOMM_EVENT_CHANNEL_OPENED: 607 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 608 if (rfcomm_event_channel_opened_get_status(packet)) { 609 log_info("RFCOMM channel open failed, status %u", rfcomm_event_channel_opened_get_status(packet)); 610 hsp_state = HSP_IDLE; 611 hsp_hs_reset_state(); 612 } else { 613 rfcomm_event_channel_opened_get_bd_addr(packet, remote); 614 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 615 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 616 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 617 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", rfcomm_cid, mtu, rfcomm_handle); 618 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 619 } 620 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, rfcomm_event_channel_opened_get_status(packet)); 621 break; 622 623 case RFCOMM_EVENT_CAN_SEND_NOW: 624 hsp_run(); 625 break; 626 627 case HCI_EVENT_DISCONNECTION_COMPLETE: 628 handle = hci_event_disconnection_complete_get_connection_handle(packet); 629 if (handle == sco_handle){ 630 sco_handle = 0; 631 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 632 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 633 break; 634 } 635 break; 636 637 case RFCOMM_EVENT_CHANNEL_CLOSED: 638 hsp_state = HSP_IDLE; 639 hsp_hs_reset_state(); 640 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 641 break; 642 643 default: 644 break; 645 } 646 647 hsp_run(); 648 } 649 650 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 651 UNUSED(packet_type); // ok: handling own sdp events 652 UNUSED(channel); // ok: no channel 653 UNUSED(size); // ok: handling own sdp events 654 655 switch (hci_event_packet_get_type(packet)){ 656 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 657 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 658 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 659 break; 660 case SDP_EVENT_QUERY_COMPLETE: 661 if (channel_nr > 0){ 662 hsp_state = HSP_W4_RFCOMM_CONNECTED; 663 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr); 664 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 665 break; 666 } 667 hsp_hs_reset_state(); 668 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 669 if (sdp_event_query_complete_get_status(packet)){ 670 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 671 } else { 672 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 673 } 674 break; 675 default: 676 break; 677 } 678 } 679 680 void hsp_hs_send_button_press(void){ 681 if ((hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) || (hsp_state >= HSP_W4_RFCOMM_DISCONNECTED)) return; 682 hs_send_button_press = 1; 683 hsp_run(); 684 } 685 686 void hsp_hs_set_sco_packet_types(uint16_t packet_types){ 687 hsp_hs_sco_packet_types = packet_types; 688 } 689