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@ -1,6 +1,7 @@
@@ -1,6 +1,7 @@
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#include <inttypes.h> |
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#include <string.h> |
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#include <boost/asio.hpp> |
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#include "Log.h" |
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#include "I2PEndian.h" |
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#include "Timestamp.h" |
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@ -8,7 +9,7 @@ namespace i2p
@@ -8,7 +9,7 @@ namespace i2p
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{ |
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namespace util |
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{ |
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std::chrono::system_clock::duration g_TimeOffset = std::chrono::system_clock::duration::zero (); |
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std::chrono::seconds g_TimeOffset (0); |
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void SyncTimeWithNTP (const std::string& address) |
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{ |
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@ -23,25 +24,25 @@ namespace util
@@ -23,25 +24,25 @@ namespace util
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socket.open (boost::asio::ip::udp::v4 (), ec); |
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if (!ec) |
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{ |
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uint8_t request[48];// 48 bytes NTP request
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memset (request, 0, 48); |
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request[0] = 0x80; // client mode, version 0
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uint8_t * response = new uint8_t[1500]; // MTU
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uint8_t buf[48];// 48 bytes NTP request/response
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memset (buf, 0, 48); |
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htobe32buf (buf, (3 << 27) | (3 << 24)); // RFC 4330
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size_t len = 0; |
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try |
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{ |
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socket.send_to (boost::asio::buffer (request, 48), ep); |
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len = socket.receive_from (boost::asio::buffer (response, 1500), ep); |
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socket.send_to (boost::asio::buffer (buf, 48), ep); |
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len = socket.receive_from (boost::asio::buffer (buf, 48), ep); |
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} |
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catch (std::exception& e) |
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{ |
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} |
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if (len >= 8) |
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{ |
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uint32_t ts = bufbe32toh (response + 4); |
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uint32_t ts = bufbe32toh (buf + 32); |
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if (ts > 2208988800U) ts -= 2208988800U; // 1/1/1970 from 1/1/1900
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g_TimeOffset = std::chrono::seconds(ts) - std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now().time_since_epoch()); |
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LogPrint (eLogInfo, address, " time offset from system time is ", g_TimeOffset.count (), " seconds"); |
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} |
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delete[] response; |
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} |
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} |
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} |
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