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 uint16_t sco_handle = 0; 85 static uint16_t rfcomm_handle = HCI_CON_HANDLE_INVALID; 86 87 // static uint8_t connection_state = 0; 88 89 static int hs_microphone_gain = -1; 90 static int hs_speaker_gain = -1; 91 92 static uint8_t hs_send_button_press = 0; 93 static uint8_t wait_ok = 0; 94 static uint8_t hs_accept_sco_connection = 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 static uint16_t hsp_hs_sco_packet_types; 103 104 typedef enum { 105 HSP_IDLE, 106 HSP_W2_SEND_SDP_QUERY, 107 HSP_W4_SDP_QUERY_COMPLETE, 108 HSP_W4_RFCOMM_CONNECTED, 109 110 HSP_RFCOMM_CONNECTION_ESTABLISHED, 111 112 HSP_W2_CONNECT_SCO, 113 HSP_W4_SCO_CONNECTED, 114 115 HSP_AUDIO_CONNECTION_ESTABLISHED, 116 117 HSP_W2_DISCONNECT_SCO, 118 HSP_W4_SCO_DISCONNECTED, 119 120 HSP_W2_DISCONNECT_RFCOMM, 121 HSP_W4_RFCOMM_DISCONNECTED, 122 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 123 } hsp_state_t; 124 125 static btstack_context_callback_registration_t hsp_hs_handle_sdp_client_query_request; 126 127 static hsp_state_t hsp_state = HSP_IDLE; 128 129 static void hsp_run(void); 130 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 131 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 132 133 static btstack_packet_handler_t hsp_hs_callback; 134 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 135 // ok: no code 136 UNUSED(packet_type); 137 UNUSED(channel); 138 UNUSED(event); 139 UNUSED(size); 140 } 141 142 void hsp_hs_register_packet_handler(btstack_packet_handler_t callback){ 143 if (callback == NULL){ 144 callback = &dummy_notify; 145 } 146 hsp_hs_callback = callback; 147 } 148 149 static void emit_event(uint8_t event_subtype, uint8_t value){ 150 if (!hsp_hs_callback) return; 151 uint8_t event[4]; 152 event[0] = HCI_EVENT_HSP_META; 153 event[1] = sizeof(event) - 2; 154 event[2] = event_subtype; 155 event[3] = value; // status 0 == OK 156 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 157 } 158 159 static void emit_ring_event(void){ 160 if (!hsp_hs_callback) return; 161 uint8_t event[3]; 162 event[0] = HCI_EVENT_HSP_META; 163 event[1] = sizeof(event) - 2; 164 event[2] = HSP_SUBEVENT_RING; 165 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 166 } 167 168 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 169 if (!hsp_hs_callback) return; 170 uint8_t event[6]; 171 event[0] = HCI_EVENT_HSP_META; 172 event[1] = sizeof(event) - 2; 173 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 174 event[3] = status; 175 little_endian_store_16(event, 4, handle); 176 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 177 } 178 179 // remote audio volume control 180 // AG +VGM=13 [0..15] ; HS AT+VGM=6 | AG OK 181 182 static int hsp_hs_send_str_over_rfcomm(uint16_t cid, const char * command){ 183 if (!rfcomm_can_send_packet_now(rfcomm_cid)) return 1; 184 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 185 if (err){ 186 log_info("rfcomm_send_internal -> error 0X%02x", err); 187 } 188 return err; 189 } 190 191 void hsp_hs_enable_custom_indications(int enable){ 192 hs_support_custom_indications = enable; 193 } 194 195 int hsp_hs_send_result(const char * result){ 196 if (!hs_support_custom_indications) return 1; 197 return hsp_hs_send_str_over_rfcomm(rfcomm_cid, result); 198 } 199 200 201 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){ 202 uint8_t* attribute; 203 de_create_sequence(service); 204 205 // 0x0000 "Service Record Handle" 206 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 207 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 208 209 // 0x0001 "Service Class ID List" 210 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 211 attribute = de_push_sequence(service); 212 { 213 // see Bluetooth Erratum #3507 214 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); // 0x1108 215 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_HS); // 0x1131 216 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); // 0x1203 217 } 218 de_pop_sequence(service, attribute); 219 220 // 0x0004 "Protocol Descriptor List" 221 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 222 attribute = de_push_sequence(service); 223 { 224 uint8_t* l2cpProtocol = de_push_sequence(attribute); 225 { 226 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 227 } 228 de_pop_sequence(attribute, l2cpProtocol); 229 230 uint8_t* rfcomm = de_push_sequence(attribute); 231 { 232 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 233 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 234 } 235 de_pop_sequence(attribute, rfcomm); 236 } 237 de_pop_sequence(service, attribute); 238 239 // 0x0005 "Public Browse Group" 240 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 241 attribute = de_push_sequence(service); 242 { 243 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 244 } 245 de_pop_sequence(service, attribute); 246 247 // 0x0009 "Bluetooth Profile Descriptor List" 248 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 249 attribute = de_push_sequence(service); 250 { 251 uint8_t *hsp_profile = de_push_sequence(attribute); 252 { 253 de_add_number(hsp_profile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 254 de_add_number(hsp_profile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 255 } 256 de_pop_sequence(attribute, hsp_profile); 257 } 258 de_pop_sequence(service, attribute); 259 260 // 0x0100 "Service Name" 261 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 262 if (name){ 263 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 264 } else { 265 de_add_data(service, DE_STRING, strlen(default_hsp_hs_service_name), (uint8_t *) default_hsp_hs_service_name); 266 } 267 268 // Remote audio volume control 269 de_add_number(service, DE_UINT, DE_SIZE_16, 0x030C); 270 de_add_number(service, DE_BOOL, DE_SIZE_8, have_remote_audio_control); 271 } 272 273 static void hsp_hs_reset_state(void){ 274 hsp_state = HSP_IDLE; 275 hs_microphone_gain = -1; 276 hs_speaker_gain = -1; 277 278 hs_send_button_press = 0; 279 wait_ok = 0; 280 hs_support_custom_indications = 0; 281 282 hsp_disconnect_rfcomm = 0; 283 hsp_establish_audio_connection = 0; 284 hsp_release_audio_connection = 0; 285 } 286 287 void hsp_hs_init(uint8_t rfcomm_channel_nr){ 288 // register for HCI events 289 hci_event_callback_registration.callback = &packet_handler; 290 hci_add_event_handler(&hci_event_callback_registration); 291 292 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 293 294 hsp_hs_sco_packet_types = SCO_PACKET_TYPES_ALL; 295 hsp_hs_reset_state(); 296 } 297 298 static void hsp_hs_handle_start_sdp_client_query(void * context){ 299 UNUSED(context); 300 if (hsp_state != HSP_W2_SEND_SDP_QUERY) return; 301 302 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 303 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(remote), BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 304 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 305 } 306 307 void hsp_hs_connect(bd_addr_t bd_addr){ 308 if (hsp_state != HSP_IDLE) return; 309 310 (void)memcpy(remote, bd_addr, 6); 311 hsp_state = HSP_W2_SEND_SDP_QUERY; 312 hsp_hs_handle_sdp_client_query_request.callback = &hsp_hs_handle_start_sdp_client_query; 313 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 314 (void) sdp_client_register_query_callback(&hsp_hs_handle_sdp_client_query_request); 315 } 316 317 void hsp_hs_disconnect(void){ 318 hsp_hs_release_audio_connection(); 319 320 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 321 hsp_state = HSP_IDLE; 322 return; 323 } 324 325 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 326 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 327 return; 328 } 329 330 hsp_establish_audio_connection = 0; 331 rfcomm_disconnect(rfcomm_cid); 332 } 333 334 335 void hsp_hs_establish_audio_connection(void){ 336 switch (hsp_state){ 337 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 338 hsp_establish_audio_connection = 1; 339 hsp_state = HSP_W4_SCO_CONNECTED; 340 break; 341 case HSP_W4_RFCOMM_CONNECTED: 342 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 343 break; 344 default: 345 break; 346 } 347 hsp_run(); 348 } 349 350 void hsp_hs_release_audio_connection(void){ 351 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 352 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 353 hsp_release_audio_connection = 1; 354 hsp_run(); 355 } 356 357 void hsp_hs_set_microphone_gain(uint8_t gain){ 358 if (gain >15) { 359 log_info("Gain must be in interval [0..15], it is given %d", gain); 360 return; 361 } 362 hs_microphone_gain = gain; 363 hsp_run(); 364 } 365 366 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 367 void hsp_hs_set_speaker_gain(uint8_t gain){ 368 if (gain >15) { 369 log_info("Gain must be in interval [0..15], it is given %d", gain); 370 return; 371 } 372 hs_speaker_gain = gain; 373 hsp_run(); 374 } 375 376 static void hsp_run_handle_state(void){ 377 switch (hsp_state){ 378 case HSP_AUDIO_CONNECTION_ESTABLISHED: 379 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 380 381 if (hs_microphone_gain >= 0){ 382 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 383 rfcomm_request_can_send_now_event(rfcomm_cid); 384 return; 385 } 386 char buffer[20]; 387 sprintf(buffer, "%s=%d\r\n", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain); 388 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 389 hs_microphone_gain = -1; 390 break; 391 } 392 393 if (hs_speaker_gain >= 0){ 394 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 395 rfcomm_request_can_send_now_event(rfcomm_cid); 396 return; 397 } 398 char buffer[20]; 399 sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain); 400 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 401 hs_speaker_gain = -1; 402 break; 403 } 404 break; 405 case HSP_W4_RFCOMM_DISCONNECTED: 406 rfcomm_disconnect(rfcomm_cid); 407 break; 408 default: 409 break; 410 } 411 } 412 413 static void hsp_run(void){ 414 415 if (wait_ok) return; 416 417 if (hs_accept_sco_connection && hci_can_send_command_packet_now()){ 418 419 bool eSCO = hs_accept_sco_connection == 2; 420 hs_accept_sco_connection = 0; 421 422 log_info("HSP: sending hci_accept_connection_request."); 423 424 // pick packet types based on SCO link type (SCO vs. eSCO) 425 uint16_t packet_types; 426 if (eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(rfcomm_handle)){ 427 packet_types = 0x3F8; 428 } else { 429 packet_types = 0x0007; 430 } 431 432 // packet type override 433 packet_types &= hsp_hs_sco_packet_types; 434 435 // bits 6-9 are 'don't use' 436 packet_types ^= 0x03c0; 437 438 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 439 440 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 441 hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, 0xffff, sco_voice_setting, 0xff, packet_types); 442 return; 443 } 444 445 if (hsp_release_audio_connection){ 446 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 447 rfcomm_request_can_send_now_event(rfcomm_cid); 448 return; 449 } 450 hsp_release_audio_connection = 0; 451 wait_ok = 1; 452 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 453 return; 454 } 455 456 if (hsp_establish_audio_connection){ 457 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 458 rfcomm_request_can_send_now_event(rfcomm_cid); 459 return; 460 } 461 hsp_establish_audio_connection = 0; 462 wait_ok = 1; 463 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 464 return; 465 } 466 467 if (hs_send_button_press){ 468 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 469 rfcomm_request_can_send_now_event(rfcomm_cid); 470 return; 471 } 472 hs_send_button_press = 0; 473 wait_ok = 1; 474 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 475 return; 476 } 477 478 hsp_run_handle_state(); 479 } 480 481 482 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 483 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 484 if (packet_type == RFCOMM_DATA_PACKET){ 485 // skip over leading newline 486 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 487 size--; 488 packet++; 489 } 490 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 491 emit_ring_event(); 492 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 493 wait_ok = 0; 494 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 495 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 496 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 497 498 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 499 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 500 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 501 } else { 502 if (!hsp_hs_callback) return; 503 // strip trailing newline 504 while ((size > 0) && ((packet[size-1] == '\n') || (packet[size-1] == '\r'))){ 505 size--; 506 } 507 // add trailing \0 508 packet[size] = 0; 509 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 510 uint8_t * event = packet - 4; 511 event[0] = HCI_EVENT_HSP_META; 512 event[1] = size + 2; 513 event[2] = HSP_SUBEVENT_AG_INDICATION; 514 event[3] = size; 515 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+4); 516 } 517 hsp_run(); 518 return; 519 } 520 521 if (packet_type != HCI_EVENT_PACKET) return; 522 523 uint8_t event = hci_event_packet_get_type(packet); 524 bd_addr_t event_addr; 525 uint16_t handle; 526 switch (event) { 527 case HCI_EVENT_CONNECTION_REQUEST: 528 switch(hci_event_connection_request_get_link_type(packet)){ 529 case 0: // SCO 530 case 2: // eSCO 531 hci_event_connection_request_get_bd_addr(packet, event_addr); 532 if (bd_addr_cmp(event_addr, remote) == 0){ 533 if (hci_event_connection_request_get_link_type(packet) == 2){ 534 hs_accept_sco_connection = 2; 535 } else { 536 hs_accept_sco_connection = 1; 537 } 538 log_info("hs_accept_sco_connection %u", hs_accept_sco_connection); 539 } 540 break; 541 default: 542 break; 543 } 544 break; 545 546 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 547 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 548 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 549 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 550 sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 551 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 552 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 553 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet); // measured in slots 554 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 555 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 556 557 if (status != 0){ 558 log_error("(e)SCO Connection failed, status %u", status); 559 emit_event_audio_connected(status, sco_handle); 560 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 561 break; 562 } 563 564 switch (link_type){ 565 case 0x00: 566 log_info("SCO Connection established."); 567 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 568 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 569 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 570 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 571 break; 572 case 0x02: 573 log_info("eSCO Connection established."); 574 break; 575 default: 576 log_error("(e)SCO reserved link_type 0x%2x", link_type); 577 break; 578 } 579 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 580 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 581 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, 582 hci_event_synchronous_connection_complete_get_air_mode(packet)); 583 584 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 585 emit_event_audio_connected(status, sco_handle); 586 break; 587 } 588 589 case RFCOMM_EVENT_INCOMING_CONNECTION: 590 if (hsp_state != HSP_IDLE) return; 591 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 592 rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 593 log_info("RFCOMM channel %u requested for %s", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr)); 594 hsp_state = HSP_W4_RFCOMM_CONNECTED; 595 rfcomm_accept_connection(rfcomm_cid); 596 break; 597 598 case RFCOMM_EVENT_CHANNEL_OPENED: 599 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 600 if (rfcomm_event_channel_opened_get_status(packet)) { 601 log_info("RFCOMM channel open failed, status %u", rfcomm_event_channel_opened_get_status(packet)); 602 hsp_state = HSP_IDLE; 603 hsp_hs_reset_state(); 604 } else { 605 rfcomm_event_channel_opened_get_bd_addr(packet, remote); 606 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 607 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 608 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 609 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", rfcomm_cid, mtu, rfcomm_handle); 610 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 611 } 612 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, rfcomm_event_channel_opened_get_status(packet)); 613 break; 614 615 case RFCOMM_EVENT_CAN_SEND_NOW: 616 hsp_run(); 617 break; 618 619 case HCI_EVENT_DISCONNECTION_COMPLETE: 620 handle = hci_event_disconnection_complete_get_connection_handle(packet); 621 if (handle == sco_handle){ 622 sco_handle = 0; 623 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 624 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 625 break; 626 } 627 break; 628 629 case RFCOMM_EVENT_CHANNEL_CLOSED: 630 hsp_state = HSP_IDLE; 631 hsp_hs_reset_state(); 632 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 633 break; 634 635 default: 636 break; 637 } 638 639 hsp_run(); 640 } 641 642 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 643 UNUSED(packet_type); // ok: handling own sdp events 644 UNUSED(channel); // ok: no channel 645 UNUSED(size); // ok: handling own sdp events 646 647 switch (hci_event_packet_get_type(packet)){ 648 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 649 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 650 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 651 break; 652 case SDP_EVENT_QUERY_COMPLETE: 653 if (channel_nr > 0){ 654 hsp_state = HSP_W4_RFCOMM_CONNECTED; 655 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr); 656 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 657 break; 658 } 659 hsp_hs_reset_state(); 660 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 661 if (sdp_event_query_complete_get_status(packet)){ 662 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 663 } else { 664 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 665 } 666 break; 667 default: 668 break; 669 } 670 } 671 672 void hsp_hs_send_button_press(void){ 673 if ((hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) || (hsp_state >= HSP_W4_RFCOMM_DISCONNECTED)) return; 674 hs_send_button_press = 1; 675 hsp_run(); 676 } 677 678 void hsp_hs_set_sco_packet_types(uint16_t packet_types){ 679 hsp_hs_sco_packet_types = packet_types; 680 } 681