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 BLUEKITCHEN 24 * GMBH 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 hsp_hs_default_service_name[] = "Headset"; 79 80 typedef enum { 81 HSP_IDLE, 82 HSP_W2_SEND_SDP_QUERY, 83 HSP_W4_SDP_QUERY_COMPLETE, 84 HSP_W4_RFCOMM_CONNECTED, 85 86 HSP_RFCOMM_CONNECTION_ESTABLISHED, 87 88 HSP_W2_CONNECT_SCO, 89 HSP_W4_SCO_CONNECTED, 90 91 HSP_AUDIO_CONNECTION_ESTABLISHED, 92 93 HSP_W2_DISCONNECT_SCO, 94 HSP_W4_SCO_DISCONNECTED, 95 96 HSP_W2_DISCONNECT_RFCOMM, 97 HSP_W4_RFCOMM_DISCONNECTED, 98 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 99 } hsp_state_t; 100 101 // higher-layer callbacks 102 static btstack_packet_handler_t hsp_hs_callback; 103 104 static bd_addr_t hsp_hs_remote; 105 static uint8_t hsp_hs_rfcomm_channel_nr; 106 static uint16_t hsp_hs_rfcomm_cid; 107 static uint16_t hsp_hs_rfcomm_mtu; 108 109 static hci_con_handle_t hsp_hs_sco_handle; 110 static hci_con_handle_t hsp_hs_rfcomm_handle; 111 112 static hsp_state_t hsp_state; 113 114 static int hsp_hs_microphone_gain; 115 static int hsp_hs_speaker_gain; 116 117 static uint8_t hsp_hs_send_button_press_triggered; 118 static uint8_t hsp_hs_wait_ok; 119 static uint8_t hsp_hs_accept_sco_connection; 120 121 static uint8_t hsp_hs_support_custom_indications; 122 static uint8_t hsp_hs_establish_audio_connection_triggered; 123 static uint8_t hsp_hs_release_audio_connection_triggered; 124 125 static uint16_t hsp_hs_sco_packet_types; 126 127 static btstack_packet_callback_registration_t hsp_hs_hci_event_callback_registration; 128 static btstack_context_callback_registration_t hsp_hs_handle_sdp_client_query_request; 129 130 131 static void hsp_run(void); 132 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 133 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 134 135 static void dummy_notify(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t size){ 136 // ok: no code 137 UNUSED(packet_type); 138 UNUSED(channel); 139 UNUSED(event); 140 UNUSED(size); 141 } 142 143 void hsp_hs_register_packet_handler(btstack_packet_handler_t callback){ 144 if (callback == NULL){ 145 callback = &dummy_notify; 146 } 147 hsp_hs_callback = callback; 148 } 149 150 static void emit_event(uint8_t event_subtype, uint8_t value){ 151 if (!hsp_hs_callback) return; 152 uint8_t event[4]; 153 event[0] = HCI_EVENT_HSP_META; 154 event[1] = sizeof(event) - 2; 155 event[2] = event_subtype; 156 event[3] = value; // status 0 == OK 157 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 158 } 159 160 static void emit_ring_event(void){ 161 if (!hsp_hs_callback) return; 162 uint8_t event[3]; 163 event[0] = HCI_EVENT_HSP_META; 164 event[1] = sizeof(event) - 2; 165 event[2] = HSP_SUBEVENT_RING; 166 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 167 } 168 169 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 170 if (!hsp_hs_callback) return; 171 uint8_t event[6]; 172 event[0] = HCI_EVENT_HSP_META; 173 event[1] = sizeof(event) - 2; 174 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 175 event[3] = status; 176 little_endian_store_16(event, 4, handle); 177 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 178 } 179 180 // remote audio volume control 181 // AG +VGM=13 [0..15] ; HS AT+VGM=6 | AG OK 182 183 static int hsp_hs_send_str_over_rfcomm(uint16_t cid, const char * command){ 184 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) return 1; 185 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 186 if (err){ 187 log_info("rfcomm_send_internal -> error 0X%02x", err); 188 } 189 return err; 190 } 191 192 void hsp_hs_enable_custom_indications(int enable){ 193 hsp_hs_support_custom_indications = enable; 194 } 195 196 int hsp_hs_send_result(const char * result){ 197 if (!hsp_hs_support_custom_indications) return 1; 198 return hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, result); 199 } 200 201 202 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){ 203 uint8_t* attribute; 204 de_create_sequence(service); 205 206 // 0x0000 "Service Record Handle" 207 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 208 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 209 210 // 0x0001 "Service Class ID List" 211 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 212 attribute = de_push_sequence(service); 213 { 214 // see Bluetooth Erratum #3507 215 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); // 0x1108 216 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET_HS); // 0x1131 217 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); // 0x1203 218 } 219 de_pop_sequence(service, attribute); 220 221 // 0x0004 "Protocol Descriptor List" 222 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 223 attribute = de_push_sequence(service); 224 { 225 uint8_t* l2cpProtocol = de_push_sequence(attribute); 226 { 227 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 228 } 229 de_pop_sequence(attribute, l2cpProtocol); 230 231 uint8_t* rfcomm = de_push_sequence(attribute); 232 { 233 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 234 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 235 } 236 de_pop_sequence(attribute, rfcomm); 237 } 238 de_pop_sequence(service, attribute); 239 240 // 0x0005 "Public Browse Group" 241 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 242 attribute = de_push_sequence(service); 243 { 244 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 245 } 246 de_pop_sequence(service, attribute); 247 248 // 0x0009 "Bluetooth Profile Descriptor List" 249 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 250 attribute = de_push_sequence(service); 251 { 252 uint8_t *hsp_profile = de_push_sequence(attribute); 253 { 254 de_add_number(hsp_profile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HEADSET); 255 de_add_number(hsp_profile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 256 } 257 de_pop_sequence(attribute, hsp_profile); 258 } 259 de_pop_sequence(service, attribute); 260 261 // 0x0100 "Service Name" 262 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 263 if (name){ 264 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 265 } else { 266 de_add_data(service, DE_STRING, strlen(hsp_hs_default_service_name), (uint8_t *) hsp_hs_default_service_name); 267 } 268 269 // Remote audio volume control 270 de_add_number(service, DE_UINT, DE_SIZE_16, 0x030C); 271 de_add_number(service, DE_BOOL, DE_SIZE_8, have_remote_audio_control); 272 } 273 274 static void hsp_hs_reset_state(void){ 275 hsp_state = HSP_IDLE; 276 hsp_hs_microphone_gain = -1; 277 hsp_hs_speaker_gain = -1; 278 hsp_hs_rfcomm_cid = 0; 279 hsp_hs_rfcomm_channel_nr = 0; 280 hsp_hs_rfcomm_handle = HCI_CON_HANDLE_INVALID; 281 hsp_hs_sco_handle = HCI_CON_HANDLE_INVALID; 282 283 hsp_hs_send_button_press_triggered = 0; 284 hsp_hs_wait_ok = 0; 285 hsp_hs_support_custom_indications = 0; 286 287 hsp_hs_accept_sco_connection = 0; 288 hsp_hs_establish_audio_connection_triggered = 0; 289 hsp_hs_release_audio_connection_triggered = 0; 290 } 291 292 void hsp_hs_init(uint8_t rfcomm_channel_nr){ 293 // register for HCI events 294 hsp_hs_hci_event_callback_registration.callback = &packet_handler; 295 hci_add_event_handler(&hsp_hs_hci_event_callback_registration); 296 297 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 298 299 hsp_hs_sco_packet_types = SCO_PACKET_TYPES_ALL; 300 hsp_hs_reset_state(); 301 } 302 303 void hsp_hs_deinit(void){ 304 hsp_hs_reset_state(); 305 hsp_hs_callback = NULL; 306 (void)memset(hsp_hs_remote, 0, 6); 307 (void)memset(&hsp_hs_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 308 (void)memset(&hsp_hs_handle_sdp_client_query_request, 0, sizeof(btstack_context_callback_registration_t)); 309 } 310 311 static void hsp_hs_handle_start_sdp_client_query(void * context){ 312 UNUSED(context); 313 if (hsp_state != HSP_W2_SEND_SDP_QUERY) return; 314 315 hsp_state = HSP_W4_SDP_QUERY_COMPLETE; 316 log_info("Start SDP query %s, 0x%02x", bd_addr_to_str(hsp_hs_remote), BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 317 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, hsp_hs_remote, BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG); 318 } 319 320 void hsp_hs_connect(bd_addr_t bd_addr){ 321 if (hsp_state != HSP_IDLE) return; 322 323 (void)memcpy(hsp_hs_remote, bd_addr, 6); 324 hsp_state = HSP_W2_SEND_SDP_QUERY; 325 hsp_hs_handle_sdp_client_query_request.callback = &hsp_hs_handle_start_sdp_client_query; 326 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 327 (void) sdp_client_register_query_callback(&hsp_hs_handle_sdp_client_query_request); 328 } 329 330 void hsp_hs_disconnect(void){ 331 hsp_hs_release_audio_connection(); 332 333 if (hsp_state < HSP_W4_RFCOMM_CONNECTED){ 334 hsp_state = HSP_IDLE; 335 return; 336 } 337 338 if (hsp_state == HSP_W4_RFCOMM_CONNECTED){ 339 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 340 return; 341 } 342 343 hsp_hs_establish_audio_connection_triggered = 0; 344 rfcomm_disconnect(hsp_hs_rfcomm_cid); 345 } 346 347 348 void hsp_hs_establish_audio_connection(void){ 349 switch (hsp_state){ 350 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 351 hsp_hs_establish_audio_connection_triggered = 1; 352 hsp_state = HSP_W4_SCO_CONNECTED; 353 break; 354 case HSP_W4_RFCOMM_CONNECTED: 355 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 356 break; 357 default: 358 break; 359 } 360 hsp_run(); 361 } 362 363 void hsp_hs_release_audio_connection(void){ 364 if (hsp_state >= HSP_W2_DISCONNECT_SCO) return; 365 if (hsp_state < HSP_AUDIO_CONNECTION_ESTABLISHED) return; 366 hsp_hs_release_audio_connection_triggered = 1; 367 hsp_run(); 368 } 369 370 void hsp_hs_set_microphone_gain(uint8_t gain){ 371 if (gain >15) { 372 log_info("Gain must be in interval [0..15], it is given %d", gain); 373 return; 374 } 375 hsp_hs_microphone_gain = gain; 376 hsp_run(); 377 } 378 379 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 380 void hsp_hs_set_speaker_gain(uint8_t gain){ 381 if (gain >15) { 382 log_info("Gain must be in interval [0..15], it is given %d", gain); 383 return; 384 } 385 hsp_hs_speaker_gain = gain; 386 hsp_run(); 387 } 388 389 static void hsp_run_handle_state(void){ 390 switch (hsp_state){ 391 case HSP_AUDIO_CONNECTION_ESTABLISHED: 392 case HSP_RFCOMM_CONNECTION_ESTABLISHED: 393 394 if (hsp_hs_microphone_gain >= 0){ 395 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) { 396 rfcomm_request_can_send_now_event(hsp_hs_rfcomm_cid); 397 return; 398 } 399 char buffer[20]; 400 snprintf(buffer, sizeof(buffer), "%s=%d\r", 401 HSP_HS_MICROPHONE_GAIN, hsp_hs_microphone_gain); 402 buffer[sizeof(buffer) - 1] = 0; 403 hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, buffer); 404 hsp_hs_microphone_gain = -1; 405 break; 406 } 407 408 if (hsp_hs_speaker_gain >= 0){ 409 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) { 410 rfcomm_request_can_send_now_event(hsp_hs_rfcomm_cid); 411 return; 412 } 413 char buffer[20]; 414 snprintf(buffer, sizeof(buffer), "%s=%d\r", 415 HSP_HS_SPEAKER_GAIN, hsp_hs_speaker_gain); 416 buffer[sizeof(buffer) - 1] = 0; 417 hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, buffer); 418 hsp_hs_speaker_gain = -1; 419 break; 420 } 421 break; 422 case HSP_W4_RFCOMM_DISCONNECTED: 423 rfcomm_disconnect(hsp_hs_rfcomm_cid); 424 break; 425 default: 426 break; 427 } 428 } 429 430 static void hsp_run(void){ 431 432 if (hsp_hs_wait_ok) return; 433 434 if (hsp_hs_accept_sco_connection && hci_can_send_command_packet_now()){ 435 436 bool eSCO = hsp_hs_accept_sco_connection == 2; 437 hsp_hs_accept_sco_connection = 0; 438 439 log_info("HSP: sending hci_accept_connection_request."); 440 441 // pick packet types based on SCO link type (SCO vs. eSCO) 442 uint16_t packet_types; 443 if (eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(hsp_hs_rfcomm_handle)){ 444 packet_types = 0x3F8; 445 } else { 446 packet_types = 0x0007; 447 } 448 449 // packet type override 450 packet_types &= hsp_hs_sco_packet_types; 451 452 // bits 6-9 are 'don't use' 453 packet_types ^= 0x03c0; 454 455 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 456 457 log_info("HFP: sending hci_accept_connection_request, sco_voice_setting %02x", sco_voice_setting); 458 hci_send_cmd(&hci_accept_synchronous_connection, hsp_hs_remote, 8000, 8000, 0xffff, sco_voice_setting, 0xff, packet_types); 459 return; 460 } 461 462 if (hsp_hs_release_audio_connection_triggered){ 463 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) { 464 rfcomm_request_can_send_now_event(hsp_hs_rfcomm_cid); 465 return; 466 } 467 hsp_hs_release_audio_connection_triggered = 0; 468 hsp_hs_wait_ok = 1; 469 hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, HSP_HS_AT_CKPD); 470 return; 471 } 472 473 if (hsp_hs_establish_audio_connection_triggered){ 474 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) { 475 rfcomm_request_can_send_now_event(hsp_hs_rfcomm_cid); 476 return; 477 } 478 hsp_hs_establish_audio_connection_triggered = 0; 479 hsp_hs_wait_ok = 1; 480 hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, HSP_HS_AT_CKPD); 481 return; 482 } 483 484 if (hsp_hs_send_button_press_triggered){ 485 if (!rfcomm_can_send_packet_now(hsp_hs_rfcomm_cid)) { 486 rfcomm_request_can_send_now_event(hsp_hs_rfcomm_cid); 487 return; 488 } 489 hsp_hs_send_button_press_triggered = 0; 490 hsp_hs_wait_ok = 1; 491 hsp_hs_send_str_over_rfcomm(hsp_hs_rfcomm_cid, HSP_HS_AT_CKPD); 492 return; 493 } 494 495 hsp_run_handle_state(); 496 } 497 498 499 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 500 UNUSED(channel); // ok: no channel for HCI_EVENT_PACKET and only single active RFCOMM channel 501 if (packet_type == RFCOMM_DATA_PACKET){ 502 // skip over leading newline 503 while ((size > 0) && ((packet[0] == '\n') || (packet[0] == '\r'))){ 504 size--; 505 packet++; 506 } 507 if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){ 508 emit_ring_event(); 509 } else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){ 510 hsp_hs_wait_ok = 0; 511 } else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){ 512 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]); 513 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 514 515 } else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){ 516 uint8_t gain = (uint8_t)btstack_atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]); 517 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 518 } else { 519 if (!hsp_hs_callback) return; 520 // strip trailing newline 521 while ((size > 0) && ((packet[size-1] == '\n') || (packet[size-1] == '\r'))){ 522 size--; 523 } 524 // add trailing \0 525 packet[size] = 0; 526 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 527 uint8_t * event = packet - 4; 528 event[0] = HCI_EVENT_HSP_META; 529 event[1] = size + 2; 530 event[2] = HSP_SUBEVENT_AG_INDICATION; 531 event[3] = size; 532 (*hsp_hs_callback)(HCI_EVENT_PACKET, 0, event, size+4); 533 } 534 hsp_run(); 535 return; 536 } 537 538 if (packet_type != HCI_EVENT_PACKET) return; 539 540 uint8_t event = hci_event_packet_get_type(packet); 541 bd_addr_t event_addr; 542 uint16_t handle; 543 switch (event) { 544 case HCI_EVENT_CONNECTION_REQUEST: 545 switch(hci_event_connection_request_get_link_type(packet)){ 546 case 0: // SCO 547 case 2: // eSCO 548 hci_event_connection_request_get_bd_addr(packet, event_addr); 549 if (bd_addr_cmp(event_addr, hsp_hs_remote) == 0){ 550 if (hci_event_connection_request_get_link_type(packet) == 2){ 551 hsp_hs_accept_sco_connection = 2; 552 } else { 553 hsp_hs_accept_sco_connection = 1; 554 } 555 log_info("hs_accept_sco_connection %u", hsp_hs_accept_sco_connection); 556 } 557 break; 558 default: 559 break; 560 } 561 break; 562 563 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 564 if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return; 565 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 566 uint8_t status = hci_event_synchronous_connection_complete_get_status(packet); 567 hsp_hs_sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 568 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 569 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 570 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet); // measured in slots 571 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 572 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 573 574 if (status != 0){ 575 log_error("(e)SCO Connection failed, status %u", status); 576 emit_event_audio_connected(status, hsp_hs_sco_handle); 577 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ; 578 break; 579 } 580 581 switch (link_type){ 582 case 0x00: 583 log_info("SCO Connection established."); 584 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 585 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 586 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 587 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 588 break; 589 case 0x02: 590 log_info("eSCO Connection established."); 591 break; 592 default: 593 log_error("(e)SCO reserved link_type 0x%2x", link_type); 594 break; 595 } 596 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 597 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", hsp_hs_sco_handle, 598 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, 599 hci_event_synchronous_connection_complete_get_air_mode(packet)); 600 601 hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED; 602 emit_event_audio_connected(status, hsp_hs_sco_handle); 603 break; 604 } 605 606 case RFCOMM_EVENT_INCOMING_CONNECTION: 607 if (hsp_state != HSP_IDLE) return; 608 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 609 hsp_hs_rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 610 log_info("RFCOMM channel %u requested for %s", rfcomm_event_incoming_connection_get_server_channel(packet), bd_addr_to_str(event_addr)); 611 hsp_state = HSP_W4_RFCOMM_CONNECTED; 612 rfcomm_accept_connection(hsp_hs_rfcomm_cid); 613 break; 614 615 case RFCOMM_EVENT_CHANNEL_OPENED: 616 if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return; 617 if (rfcomm_event_channel_opened_get_status(packet)) { 618 log_info("RFCOMM channel open failed, status %u", rfcomm_event_channel_opened_get_status(packet)); 619 hsp_state = HSP_IDLE; 620 hsp_hs_reset_state(); 621 } else { 622 rfcomm_event_channel_opened_get_bd_addr(packet, hsp_hs_remote); 623 hsp_hs_rfcomm_handle = rfcomm_event_channel_opened_get_con_handle(packet); 624 hsp_hs_rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 625 hsp_hs_rfcomm_mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 626 log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", hsp_hs_rfcomm_cid, hsp_hs_rfcomm_mtu, hsp_hs_rfcomm_handle); 627 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 628 } 629 emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, rfcomm_event_channel_opened_get_status(packet)); 630 break; 631 632 case RFCOMM_EVENT_CAN_SEND_NOW: 633 hsp_run(); 634 break; 635 636 case HCI_EVENT_DISCONNECTION_COMPLETE: 637 handle = hci_event_disconnection_complete_get_connection_handle(packet); 638 if (handle == hsp_hs_sco_handle){ 639 hsp_hs_sco_handle = 0; 640 hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED; 641 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 642 break; 643 } 644 break; 645 646 case RFCOMM_EVENT_CHANNEL_CLOSED: 647 hsp_state = HSP_IDLE; 648 hsp_hs_reset_state(); 649 emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0); 650 break; 651 652 default: 653 break; 654 } 655 656 hsp_run(); 657 } 658 659 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 660 UNUSED(packet_type); // ok: handling own sdp events 661 UNUSED(channel); // ok: no channel 662 UNUSED(size); // ok: handling own sdp events 663 664 switch (hci_event_packet_get_type(packet)){ 665 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 666 hsp_hs_rfcomm_channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 667 log_info("** Service name: '%s', RFCOMM port %u", sdp_event_query_rfcomm_service_get_name(packet), hsp_hs_rfcomm_channel_nr); 668 break; 669 case SDP_EVENT_QUERY_COMPLETE: 670 if (hsp_hs_rfcomm_channel_nr > 0){ 671 hsp_state = HSP_W4_RFCOMM_CONNECTED; 672 log_info("HSP: SDP_QUERY_COMPLETE. RFCOMM create channel, addr %s, rfcomm channel nr %d", bd_addr_to_str(hsp_hs_remote), hsp_hs_rfcomm_channel_nr); 673 rfcomm_create_channel(packet_handler, hsp_hs_remote, hsp_hs_rfcomm_channel_nr, NULL); 674 break; 675 } 676 hsp_hs_reset_state(); 677 log_info("Service not found, status %u.", sdp_event_query_complete_get_status(packet)); 678 if (sdp_event_query_complete_get_status(packet)){ 679 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 680 } else { 681 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 682 } 683 break; 684 default: 685 break; 686 } 687 } 688 689 void hsp_hs_send_button_press(void){ 690 if ((hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) || (hsp_state >= HSP_W4_RFCOMM_DISCONNECTED)) return; 691 hsp_hs_send_button_press_triggered = 1; 692 hsp_run(); 693 } 694 695 void hsp_hs_set_sco_packet_types(uint16_t packet_types){ 696 hsp_hs_sco_packet_types = packet_types; 697 } 698