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 = 0; 87 88 // static uint8_t connection_state = 0; 89 90 static int hs_microphone_gain = -1; 91 static int hs_speaker_gain = -1; 92 93 static uint8_t hs_send_button_press = 0; 94 static uint8_t wait_ok = 0; 95 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 if (hsp_state < HSP_W4_SCO_CONNECTED){ 316 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 317 return; 318 } 319 320 hsp_disconnect_rfcomm = 1; 321 hsp_run(); 322 } 323 324 325 void hsp_hs_establish_audio_connection(void){ 326 switch (hsp_state){ 327 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 328 hsp_establish_audio_connection = 1; 329 hsp_state = HSP_W4_SCO_CONNECTED; 330 break; 331 case HSP_W4_RFCOMM_CONNECTED: 332 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 333 break; 334 default: 335 break; 336 } 337 hsp_run(); 338 } 339 340 void hsp_hs_release_audio_connection(void){ 341 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 342 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 343 hsp_release_audio_connection = 1; 344 hsp_run(); 345 } 346 347 void hsp_hs_set_microphone_gain(uint8_t gain){ 348 if (gain >15) { 349 log_info("Gain must be in interval [0..15], it is given %d", gain); 350 return; 351 } 352 hs_microphone_gain = gain; 353 hsp_run(); 354 } 355 356 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 357 void hsp_hs_set_speaker_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_speaker_gain = gain; 363 hsp_run(); 364 } 365 366 367 static void hsp_run(void){ 368 369 if (wait_ok) return; 370 371 if (hs_accept_sco_connection && hci_can_send_command_packet_now()){ 372 373 bool eSCO = hs_accept_sco_connection == 2; 374 hs_accept_sco_connection = 0; 375 376 log_info("HSP: sending hci_accept_connection_request."); 377 // remote supported feature eSCO is set if link type is eSCO 378 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 379 uint16_t max_latency; 380 uint8_t retransmission_effort; 381 uint16_t packet_types; 382 383 if (eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(rfcomm_handle)){ 384 max_latency = 0x000c; 385 retransmission_effort = 0x02; 386 packet_types = 0x388; 387 } else { 388 max_latency = 0xffff; 389 retransmission_effort = 0xff; 390 packet_types = 0x003f; 391 } 392 393 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 394 395 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 396 hci_send_cmd(&hci_accept_synchronous_connection, remote, 8000, 8000, max_latency, 397 sco_voice_setting, retransmission_effort, packet_types); 398 return; 399 } 400 401 if (hsp_release_audio_connection){ 402 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 403 rfcomm_request_can_send_now_event(rfcomm_cid); 404 return; 405 } 406 hsp_release_audio_connection = 0; 407 wait_ok = 1; 408 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 409 return; 410 } 411 412 if (hsp_disconnect_rfcomm){ 413 hsp_disconnect_rfcomm = 0; 414 hsp_establish_audio_connection = 0; 415 rfcomm_disconnect(rfcomm_cid); 416 return; 417 } 418 419 if (hsp_establish_audio_connection){ 420 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 421 rfcomm_request_can_send_now_event(rfcomm_cid); 422 return; 423 } 424 hsp_establish_audio_connection = 0; 425 wait_ok = 1; 426 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 427 return; 428 } 429 430 if (hs_send_button_press){ 431 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 432 rfcomm_request_can_send_now_event(rfcomm_cid); 433 return; 434 } 435 hs_send_button_press = 0; 436 wait_ok = 1; 437 hsp_hs_send_str_over_rfcomm(rfcomm_cid, HSP_HS_AT_CKPD); 438 return; 439 } 440 441 switch (hsp_state){ 442 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 443 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 444 sdp_client_query_rfcomm_channel_and_name_for_uuid(&handle_query_rfcomm_event, remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 445 break; 446 447 case HSP_AUDIO_CONNECTION_ESTABLISHED: 448 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 449 450 if (hs_microphone_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_MICROPHONE_GAIN, hs_microphone_gain); 457 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 458 hs_microphone_gain = -1; 459 break; 460 } 461 462 if (hs_speaker_gain >= 0){ 463 if (!rfcomm_can_send_packet_now(rfcomm_cid)) { 464 rfcomm_request_can_send_now_event(rfcomm_cid); 465 return; 466 } 467 char buffer[20]; 468 sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain); 469 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer); 470 hs_speaker_gain = -1; 471 break; 472 } 473 break; 474 case HSP_W4_RFCOMM_DISCONNECTED: 475 rfcomm_disconnect(rfcomm_cid); 476 break; 477 default: 478 break; 479 } 480 } 481 482 483 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 484 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 485 if (packet_type == RFCOMM_DATA_PACKET){ 486 // printf("packet_handler type RFCOMM_DATA_PACKET %u, packet[0] %x\n", packet_type, packet[0]); 487 // skip over leading newline 488 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 489 size--; 490 packet++; 491 } 492 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 493 emit_ring_event(); 494 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 495 wait_ok = 0; 496 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 497 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 498 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 499 500 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 501 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 502 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 503 } else { 504 if (!hsp_hs_callback) return; 505 // strip trailing newline 506 while ((size > 0) && ((packet[size-1] == '\n') || (packet[size-1] == '\r'))){ 507 size--; 508 } 509 // add trailing \0 510 packet[size] = 0; 511 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 512 uint8_t * event = packet - 4; 513 event[0] = HCI_EVENT_HSP_META; 514 event[1] = size + 2; 515 event[2] = HSP_SUBEVENT_AG_INDICATION; 516 event[3] = size; 517 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+4); 518 } 519 hsp_run(); 520 return; 521 } 522 523 if (packet_type != HCI_EVENT_PACKET) return; 524 uint8_t event = hci_event_packet_get_type(packet); 525 bd_addr_t event_addr; 526 uint16_t handle; 527 // printf("packet_handler HCI_EVENT_PACKET type %u, packet[0] %x\n", packet_type, packet[0]); 528 switch (event) { 529 case HCI_EVENT_CONNECTION_REQUEST: 530 switch(hci_event_connection_request_get_link_type(packet)){ 531 case 0: // SCO 532 case 2: // eSCO 533 hci_event_connection_request_get_bd_addr(packet, event_addr); 534 if (bd_addr_cmp(event_addr, remote) == 0){ 535 if (hci_event_connection_request_get_link_type(packet) == 2){ 536 hs_accept_sco_connection = 2; 537 } else { 538 hs_accept_sco_connection = 1; 539 } 540 log_info("hs_accept_sco_connection %u", hs_accept_sco_connection); 541 } 542 break; 543 default: 544 break; 545 } 546 break; 547 548 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 549 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 550 int index = 2; 551 uint8_t status = packet[index++]; 552 sco_handle = little_endian_read_16(packet, index); 553 index+=2; 554 bd_addr_t address; 555 (void)memcpy(address, &packet[index], 6); 556 index+=6; 557 uint8_t link_type = packet[index++]; 558 uint8_t transmission_interval = packet[index++]; // measured in slots 559 uint8_t retransmission_interval = packet[index++];// measured in slots 560 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 561 index+=2; 562 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 563 index+=2; 564 uint8_t air_mode = packet[index]; 565 566 if (status != 0){ 567 log_error("(e)SCO Connection failed, status %u", status); 568 emit_event_audio_connected(status, sco_handle); 569 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 570 break; 571 } 572 573 switch (link_type){ 574 case 0x00: 575 log_info("SCO Connection established."); 576 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 577 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 578 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 579 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 580 break; 581 case 0x02: 582 log_info("eSCO Connection established."); 583 break; 584 default: 585 log_error("(e)SCO reserved link_type 0x%2x", link_type); 586 break; 587 } 588 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 589 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 590 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 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 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 599 if (hsp_state != HSP_IDLE) return; 600 601 reverse_bd_addr(&packet[2], event_addr); 602 rfcomm_cid = little_endian_read_16(packet, 9); 603 log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr)); 604 hsp_state = HSP_W4_RFCOMM_CONNECTED; 605 rfcomm_accept_connection(rfcomm_cid); 606 break; 607 608 case RFCOMM_EVENT_CHANNEL_OPENED: 609 // printf("RFCOMM_EVENT_CHANNEL_OPENED packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 610 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 611 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 612 if (packet[2]) { 613 log_info("RFCOMM channel open failed, status %u", packet[2]); 614 hsp_state = HSP_IDLE; 615 hsp_hs_reset_state(); 616 } else { 617 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 618 rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 619 rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 620 mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 621 rfcomm_event_channel_opened_get_bd_addr(packet, remote); 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, packet[2]); 626 break; 627 628 case RFCOMM_EVENT_CAN_SEND_NOW: 629 hsp_run(); 630 break; 631 632 case HCI_EVENT_DISCONNECTION_COMPLETE: 633 handle = little_endian_read_16(packet,3); 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 if (handle == rfcomm_handle) { 641 rfcomm_handle = 0; 642 hsp_state = HSP_IDLE; 643 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 644 hsp_hs_reset_state(); 645 } 646 break; 647 648 case RFCOMM_EVENT_CHANNEL_CLOSED: 649 hsp_hs_reset_state(); 650 hsp_hs_callback(HCI_EVENT_PACKET, 0, packet, size); 651 break; 652 653 default: 654 break; 655 } 656 657 hsp_run(); 658 } 659 660 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 661 UNUSED(packet_type); // ok: handling own sdp events 662 UNUSED(channel); // ok: no channel 663 UNUSED(size); // ok: handling own sdp events 664 665 switch (hci_event_packet_get_type(packet)){ 666 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 667 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 668 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 669 break; 670 case SDP_EVENT_QUERY_COMPLETE: 671 if (channel_nr > 0){ 672 hsp_state = HSP_W4_RFCOMM_CONNECTED; 673 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(remote), channel_nr); 674 rfcomm_create_channel(packet_handler, remote, channel_nr, NULL); 675 break; 676 } 677 hsp_hs_reset_state(); 678 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 679 if (sdp_event_query_complete_get_status(packet)){ 680 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 681 } else { 682 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 683 } 684 break; 685 } 686 } 687 688 void hsp_hs_send_button_press(void){ 689 if ((hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) || (hsp_state >= HSP_W4_RFCOMM_DISCONNECTED)) return; 690 hs_send_button_press = 1; 691 hsp_run(); 692 } 693