ref: 9196c18d376d4f18c686bcfec8550f9c8659d5ea
src/components/ble/NimbleController.cpp
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#include "components/ble/NimbleController.h" #include <cstring> #include <nrf_log.h> #define min // workaround: nimble's min/max macros conflict with libstdc++ #define max #include <host/ble_gap.h> #include <host/ble_hs.h> #include <host/ble_hs_id.h> #include <host/util/util.h> #include <controller/ble_ll.h> #include <controller/ble_hw.h> #include <services/gap/ble_svc_gap.h> #include <services/gatt/ble_svc_gatt.h> #undef max #undef min #include "components/ble/BleController.h" #include "components/ble/NotificationManager.h" #include "components/datetime/DateTimeController.h" #include "components/fs/FS.h" #include "systemtask/SystemTask.h" using namespace Pinetime::Controllers; NimbleController::NimbleController(Pinetime::System::SystemTask& systemTask, Ble& bleController, DateTime& dateTimeController, NotificationManager& notificationManager, Battery& batteryController, Pinetime::Drivers::SpiNorFlash& spiNorFlash, HeartRateController& heartRateController, MotionController& motionController, FS& fs) : systemTask {systemTask}, bleController {bleController}, dateTimeController {dateTimeController}, spiNorFlash {spiNorFlash}, fs {fs}, dfuService {systemTask, bleController, spiNorFlash}, currentTimeClient {dateTimeController}, anService {systemTask, notificationManager}, alertNotificationClient {systemTask, notificationManager}, currentTimeService {dateTimeController}, musicService {*this}, weatherService {dateTimeController}, batteryInformationService {batteryController}, immediateAlertService {systemTask, notificationManager}, heartRateService {*this, heartRateController}, motionService {*this, motionController}, fsService {systemTask, fs}, serviceDiscovery({¤tTimeClient, &alertNotificationClient}) { } void nimble_on_reset(int reason) { NRF_LOG_INFO("Nimble lost sync, resetting state; reason=%d", reason); } void nimble_on_sync(void) { int rc; NRF_LOG_INFO("Nimble is synced"); rc = ble_hs_util_ensure_addr(0); ASSERT(rc == 0); nptr->StartAdvertising(); } int GAPEventCallback(struct ble_gap_event* event, void* arg) { auto nimbleController = static_cast<NimbleController*>(arg); return nimbleController->OnGAPEvent(event); } void NimbleController::Init() { while (!ble_hs_synced()) { vTaskDelay(10); } nptr = this; ble_hs_cfg.reset_cb = nimble_on_reset; ble_hs_cfg.sync_cb = nimble_on_sync; ble_hs_cfg.store_status_cb = ble_store_util_status_rr; ble_svc_gap_init(); ble_svc_gatt_init(); deviceInformationService.Init(); currentTimeClient.Init(); currentTimeService.Init(); musicService.Init(); weatherService.Init(); navService.Init(); anService.Init(); dfuService.Init(); batteryInformationService.Init(); immediateAlertService.Init(); heartRateService.Init(); motionService.Init(); fsService.Init(); int rc; rc = ble_hs_util_ensure_addr(0); ASSERT(rc == 0); rc = ble_hs_id_infer_auto(0, &addrType); ASSERT(rc == 0); rc = ble_svc_gap_device_name_set(deviceName); ASSERT(rc == 0); rc = ble_svc_gap_device_appearance_set(0xC2); ASSERT(rc == 0); Pinetime::Controllers::Ble::BleAddress address; rc = ble_hs_id_copy_addr(addrType, address.data(), nullptr); ASSERT(rc == 0); bleController.Address(std::move(address)); switch (addrType) { case BLE_OWN_ADDR_PUBLIC: bleController.AddressType(Ble::AddressTypes::Public); break; case BLE_OWN_ADDR_RANDOM: bleController.AddressType(Ble::AddressTypes::Random); break; case BLE_OWN_ADDR_RPA_PUBLIC_DEFAULT: bleController.AddressType(Ble::AddressTypes::RPA_Public); break; case BLE_OWN_ADDR_RPA_RANDOM_DEFAULT: bleController.AddressType(Ble::AddressTypes::RPA_Random); break; } rc = ble_gatts_start(); ASSERT(rc == 0); RestoreBond(); StartAdvertising(); } void NimbleController::StartAdvertising() { struct ble_gap_adv_params adv_params; struct ble_hs_adv_fields fields; struct ble_hs_adv_fields rsp_fields; memset(&adv_params, 0, sizeof(adv_params)); memset(&fields, 0, sizeof(fields)); memset(&rsp_fields, 0, sizeof(rsp_fields)); adv_params.conn_mode = BLE_GAP_CONN_MODE_UND; adv_params.disc_mode = BLE_GAP_DISC_MODE_GEN; /* fast advertise for 30 sec */ if (fastAdvCount < 15) { adv_params.itvl_min = 32; adv_params.itvl_max = 47; fastAdvCount++; } else { adv_params.itvl_min = 1636; adv_params.itvl_max = 1651; } fields.flags = BLE_HS_ADV_F_DISC_GEN | BLE_HS_ADV_F_BREDR_UNSUP; fields.uuids128 = &dfuServiceUuid; fields.num_uuids128 = 1; fields.uuids128_is_complete = 1; fields.tx_pwr_lvl = BLE_HS_ADV_TX_PWR_LVL_AUTO; rsp_fields.name = reinterpret_cast<const uint8_t*>(deviceName); rsp_fields.name_len = strlen(deviceName); rsp_fields.name_is_complete = 1; int rc; rc = ble_gap_adv_set_fields(&fields); ASSERT(rc == 0); rc = ble_gap_adv_rsp_set_fields(&rsp_fields); ASSERT(rc == 0); rc = ble_gap_adv_start(addrType, NULL, 2000, &adv_params, GAPEventCallback, this); ASSERT(rc == 0); } int NimbleController::OnGAPEvent(ble_gap_event* event) { switch (event->type) { case BLE_GAP_EVENT_ADV_COMPLETE: NRF_LOG_INFO("Advertising event : BLE_GAP_EVENT_ADV_COMPLETE"); NRF_LOG_INFO("reason=%d; status=%0X", event->adv_complete.reason, event->connect.status); if (bleController.IsRadioEnabled() && !bleController.IsConnected()) { StartAdvertising(); } break; case BLE_GAP_EVENT_CONNECT: /* A new connection was established or a connection attempt failed. */ NRF_LOG_INFO("Connect event : BLE_GAP_EVENT_CONNECT"); NRF_LOG_INFO("connection %s; status=%0X ", event->connect.status == 0 ? "established" : "failed", event->connect.status); if (event->connect.status != 0) { /* Connection failed; resume advertising. */ currentTimeClient.Reset(); alertNotificationClient.Reset(); connectionHandle = BLE_HS_CONN_HANDLE_NONE; bleController.Disconnect(); fastAdvCount = 0; StartAdvertising(); } else { connectionHandle = event->connect.conn_handle; bleController.Connect(); systemTask.PushMessage(Pinetime::System::Messages::BleConnected); // Service discovery is deferred via systemtask } break; case BLE_GAP_EVENT_DISCONNECT: /* Connection terminated; resume advertising. */ NRF_LOG_INFO("Disconnect event : BLE_GAP_EVENT_DISCONNECT"); NRF_LOG_INFO("disconnect reason=%d", event->disconnect.reason); if (event->disconnect.conn.sec_state.bonded) { PersistBond(event->disconnect.conn); } currentTimeClient.Reset(); alertNotificationClient.Reset(); connectionHandle = BLE_HS_CONN_HANDLE_NONE; if (bleController.IsConnected()) { bleController.Disconnect(); fastAdvCount = 0; StartAdvertising(); } break; case BLE_GAP_EVENT_CONN_UPDATE: /* The central has updated the connection parameters. */ NRF_LOG_INFO("Update event : BLE_GAP_EVENT_CONN_UPDATE"); NRF_LOG_INFO("update status=%0X ", event->conn_update.status); break; case BLE_GAP_EVENT_CONN_UPDATE_REQ: /* The central has requested updated connection parameters */ NRF_LOG_INFO("Update event : BLE_GAP_EVENT_CONN_UPDATE_REQ"); NRF_LOG_INFO("update request : itvl_min=%d itvl_max=%d latency=%d supervision=%d", event->conn_update_req.peer_params->itvl_min, event->conn_update_req.peer_params->itvl_max, event->conn_update_req.peer_params->latency, event->conn_update_req.peer_params->supervision_timeout); break; case BLE_GAP_EVENT_ENC_CHANGE: /* Encryption has been enabled or disabled for this connection. */ NRF_LOG_INFO("Security event : BLE_GAP_EVENT_ENC_CHANGE"); NRF_LOG_INFO("encryption change event; status=%0X ", event->enc_change.status); if (event->enc_change.status == 0) { struct ble_gap_conn_desc desc; ble_gap_conn_find(event->enc_change.conn_handle, &desc); if (desc.sec_state.bonded) { PersistBond(desc); } NRF_LOG_INFO("new state: encrypted=%d authenticated=%d bonded=%d key_size=%d", desc.sec_state.encrypted, desc.sec_state.authenticated, desc.sec_state.bonded, desc.sec_state.key_size); } break; case BLE_GAP_EVENT_PASSKEY_ACTION: /* Authentication has been requested for this connection. * * BLE authentication is determined by the combination of I/O capabilities * on the central and peripheral. When the peripheral is display only and * the central has a keyboard and display then passkey auth is selected. * When both the central and peripheral have displays and support yes/no * buttons then numeric comparison is selected. We currently advertise * display capability only so we only handle the "display" action here. * * Standards insist that the rand() PRNG be deterministic. * Use the tinycrypt prng here since rand() is predictable. */ NRF_LOG_INFO("Security event : BLE_GAP_EVENT_PASSKEY_ACTION"); if (event->passkey.params.action == BLE_SM_IOACT_DISP) { struct ble_sm_io pkey = {0}; pkey.action = event->passkey.params.action; /* * Passkey is a 6 digits code (1'000'000 possibilities). * It is important every possible value has an equal probability * of getting generated. Simply applying a modulo creates a bias * since 2^32 is not a multiple of 1'000'000. * To prevent that, we can reject values greater than 999'999. * * Rejecting values would happen a lot since 2^32-1 is way greater * than 1'000'000. An optimisation is to use a multiple of 1'000'000. * The greatest multiple of 1'000'000 lesser than 2^32-1 is * 4'294'000'000. * * Great explanation at: * https://research.kudelskisecurity.com/2020/07/28/the-definitive-guide-to-modulo-bias-and-how-to-avoid-it/ */ uint32_t passkey_rand; do { passkey_rand = ble_ll_rand(); } while (passkey_rand > 4293999999); pkey.passkey = passkey_rand % 1000000; bleController.SetPairingKey(pkey.passkey); systemTask.PushMessage(Pinetime::System::Messages::OnPairing); ble_sm_inject_io(event->passkey.conn_handle, &pkey); } break; case BLE_GAP_EVENT_SUBSCRIBE: NRF_LOG_INFO("Subscribe event; conn_handle=%d attr_handle=%d " "reason=%d prevn=%d curn=%d previ=%d curi=???\n", event->subscribe.conn_handle, event->subscribe.attr_handle, event->subscribe.reason, event->subscribe.prev_notify, event->subscribe.cur_notify, event->subscribe.prev_indicate); if (event->subscribe.reason == BLE_GAP_SUBSCRIBE_REASON_TERM) { heartRateService.UnsubscribeNotification(event->subscribe.attr_handle); motionService.UnsubscribeNotification(event->subscribe.attr_handle); } else if (event->subscribe.prev_notify == 0 && event->subscribe.cur_notify == 1) { heartRateService.SubscribeNotification(event->subscribe.attr_handle); motionService.SubscribeNotification(event->subscribe.attr_handle); } else if (event->subscribe.prev_notify == 1 && event->subscribe.cur_notify == 0) { heartRateService.UnsubscribeNotification(event->subscribe.attr_handle); motionService.UnsubscribeNotification(event->subscribe.attr_handle); } break; case BLE_GAP_EVENT_MTU: NRF_LOG_INFO("MTU Update event; conn_handle=%d cid=%d mtu=%d", event->mtu.conn_handle, event->mtu.channel_id, event->mtu.value); break; case BLE_GAP_EVENT_REPEAT_PAIRING: { NRF_LOG_INFO("Pairing event : BLE_GAP_EVENT_REPEAT_PAIRING"); /* We already have a bond with the peer, but it is attempting to * establish a new secure link. This app sacrifices security for * convenience: just throw away the old bond and accept the new link. */ /* Delete the old bond. */ struct ble_gap_conn_desc desc; ble_gap_conn_find(event->repeat_pairing.conn_handle, &desc); ble_store_util_delete_peer(&desc.peer_id_addr); /* Return BLE_GAP_REPEAT_PAIRING_RETRY to indicate that the host should * continue with the pairing operation. */ } return BLE_GAP_REPEAT_PAIRING_RETRY; case BLE_GAP_EVENT_NOTIFY_RX: { /* Peer sent us a notification or indication. */ /* Attribute data is contained in event->notify_rx.attr_data. */ NRF_LOG_INFO("Notify event : BLE_GAP_EVENT_NOTIFY_RX"); size_t notifSize = OS_MBUF_PKTLEN(event->notify_rx.om); NRF_LOG_INFO("received %s; conn_handle=%d attr_handle=%d " "attr_len=%d", event->notify_rx.indication ? "indication" : "notification", event->notify_rx.conn_handle, event->notify_rx.attr_handle, notifSize); alertNotificationClient.OnNotification(event); } break; case BLE_GAP_EVENT_NOTIFY_TX: NRF_LOG_INFO("Notify event : BLE_GAP_EVENT_NOTIFY_TX"); break; case BLE_GAP_EVENT_IDENTITY_RESOLVED: NRF_LOG_INFO("Identity event : BLE_GAP_EVENT_IDENTITY_RESOLVED"); break; default: NRF_LOG_INFO("UNHANDLED GAP event : %d", event->type); break; } return 0; } void NimbleController::StartDiscovery() { if (connectionHandle != BLE_HS_CONN_HANDLE_NONE) { serviceDiscovery.StartDiscovery(connectionHandle); } } uint16_t NimbleController::connHandle() { return connectionHandle; } void NimbleController::NotifyBatteryLevel(uint8_t level) { if (connectionHandle != BLE_HS_CONN_HANDLE_NONE) { batteryInformationService.NotifyBatteryLevel(connectionHandle, level); } } void NimbleController::EnableRadio() { bleController.EnableRadio(); bleController.Disconnect(); fastAdvCount = 0; StartAdvertising(); } void NimbleController::DisableRadio() { bleController.DisableRadio(); if (bleController.IsConnected()) { ble_gap_terminate(connectionHandle, BLE_ERR_REM_USER_CONN_TERM); bleController.Disconnect(); } else { ble_gap_adv_stop(); } } void NimbleController::PersistBond(struct ble_gap_conn_desc& desc) { union ble_store_key key; union ble_store_value our_sec, peer_sec, peer_cccd_set[MYNEWT_VAL(BLE_STORE_MAX_CCCDS)] = {0}; int rc; memset(&key, 0, sizeof key); memset(&our_sec, 0, sizeof our_sec); key.sec.peer_addr = desc.peer_id_addr; rc = ble_store_read_our_sec(&key.sec, &our_sec.sec); if (memcmp(&our_sec.sec, &bondId, sizeof bondId) == 0) { return; } memcpy(&bondId, &our_sec.sec, sizeof bondId); memset(&key, 0, sizeof key); memset(&peer_sec, 0, sizeof peer_sec); key.sec.peer_addr = desc.peer_id_addr; rc += ble_store_read_peer_sec(&key.sec, &peer_sec.sec); if (rc == 0) { memset(&key, 0, sizeof key); key.cccd.peer_addr = desc.peer_id_addr; int peer_count = 0; ble_store_util_count(BLE_STORE_OBJ_TYPE_CCCD, &peer_count); for (int i = 0; i < peer_count; i++) { key.cccd.idx = peer_count; ble_store_read_cccd(&key.cccd, &peer_cccd_set[i].cccd); } /* Wakeup Spi and SpiNorFlash before accessing the file system * This should be fixed in the FS driver */ systemTask.PushMessage(Pinetime::System::Messages::GoToRunning); systemTask.PushMessage(Pinetime::System::Messages::DisableSleeping); vTaskDelay(10); lfs_file_t file_p; rc = fs.FileOpen(&file_p, "/bond.dat", LFS_O_WRONLY | LFS_O_CREAT); if (rc == 0) { fs.FileWrite(&file_p, reinterpret_cast<uint8_t*>(&our_sec.sec), sizeof our_sec); fs.FileWrite(&file_p, reinterpret_cast<uint8_t*>(&peer_sec.sec), sizeof peer_sec); fs.FileWrite(&file_p, reinterpret_cast<const uint8_t*>(&peer_count), 1); for (int i = 0; i < peer_count; i++) { fs.FileWrite(&file_p, reinterpret_cast<uint8_t*>(&peer_cccd_set[i].cccd), sizeof(struct ble_store_value_cccd)); } fs.FileClose(&file_p); } systemTask.PushMessage(Pinetime::System::Messages::EnableSleeping); } } void NimbleController::RestoreBond() { lfs_file_t file_p; union ble_store_value sec, cccd; uint8_t peer_count = 0; if (fs.FileOpen(&file_p, "/bond.dat", LFS_O_RDONLY) == 0) { memset(&sec, 0, sizeof sec); fs.FileRead(&file_p, reinterpret_cast<uint8_t*>(&sec.sec), sizeof sec); ble_store_write_our_sec(&sec.sec); memset(&sec, 0, sizeof sec); fs.FileRead(&file_p, reinterpret_cast<uint8_t*>(&sec.sec), sizeof sec); ble_store_write_peer_sec(&sec.sec); fs.FileRead(&file_p, &peer_count, 1); for (int i = 0; i < peer_count; i++) { fs.FileRead(&file_p, reinterpret_cast<uint8_t*>(&cccd.cccd), sizeof(struct ble_store_value_cccd)); ble_store_write_cccd(&cccd.cccd); } fs.FileClose(&file_p); fs.FileDelete("/bond.dat"); } } |