71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
// Copyright (c) 2014 The Bitcoin Core developers
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// Copyright (c) 2020-2023 The Zcash developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or https://www.opensource.org/licenses/mit-license.php .
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#include "timedata.h"
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#include "netbase.h"
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#include "sync.h"
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#include "ui_interface.h"
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#include "util/system.h"
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#include "util/strencodings.h"
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#include "warnings.h"
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CTimeWarning timeWarning;
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/**
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* Warn if we have seen TIMEDATA_WARNING_SAMPLES peer times, in the version messages of the
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* first TIMEDATA_MAX_SAMPLES unique (by IP address) peers that connect, that are more than
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* TIMEDATA_WARNING_THRESHOLD seconds but less than TIMEDATA_IGNORE_THRESHOLD seconds away
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* from local time.
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*/
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int64_t CTimeWarning::AddTimeData(const CNetAddr& ip, int64_t nTime, int64_t now)
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{
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assert(now >= 0 && now <= INT64_MAX - TIMEDATA_IGNORE_THRESHOLD);
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if (nTime <= now - TIMEDATA_IGNORE_THRESHOLD || nTime >= now + TIMEDATA_IGNORE_THRESHOLD) {
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return 0;
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}
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int64_t nTimeOffset = nTime - now;
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LOCK(cs);
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// Ignore duplicate IPs.
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if (setKnown.size() == TIMEDATA_MAX_SAMPLES || !setKnown.insert(ip).second) {
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return nTimeOffset;
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}
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LogPrint("net","added time data, samples %d, offset %+d (%+d minutes)\n", setKnown.size(), nTimeOffset, nTimeOffset/60);
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if (nPeersBehind + nPeersAhead < TIMEDATA_WARNING_SAMPLES) {
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if (nTimeOffset < -TIMEDATA_WARNING_THRESHOLD) {
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nPeersBehind++;
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} else if (nTimeOffset > TIMEDATA_WARNING_THRESHOLD) {
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nPeersAhead++;
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}
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if (nPeersBehind + nPeersAhead == TIMEDATA_WARNING_SAMPLES) {
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Warn(nPeersAhead, nPeersBehind);
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}
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}
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return nTimeOffset;
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}
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void CTimeWarning::Warn(size_t peersAhead, size_t peersBehind)
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{
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std::string strMessage;
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if (peersBehind >= TIMEDATA_WARNING_MAJORITY) {
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strMessage = _("Your computer's date and time may be ahead of the rest of the network! If your clock is wrong Zcash will not work properly.");
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} else if (peersAhead >= TIMEDATA_WARNING_MAJORITY) {
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strMessage = _("Your computer's date and time may be behind the rest of the network! If your clock is wrong Zcash will not work properly.");
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} else {
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strMessage = _("Please check that your computer's date and time are correct! If your clock is wrong Zcash will not work properly.");
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}
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SetMiscWarning(strMessage, GetTime());
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uiInterface.ThreadSafeMessageBox(strMessage, "", CClientUIInterface::MSG_WARNING);
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}
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