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//
// NTPClient.cpp
//
// Library: Net
// Package: NTP
// Module: NTPClient
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Net/SocketAddress.h"
#include "Poco/Net/NTPClient.h"
#include "Poco/Net/NTPPacket.h"
#include "Poco/Net/DatagramSocket.h"
#include "Poco/Net/NetException.h"
using Poco::TimeoutException;
namespace Poco {
namespace Net {
NTPClient::NTPClient(IPAddress::Family family, int timeout):
_family(family), _timeout(timeout)
{
}
NTPClient::~NTPClient()
{
}
int NTPClient::request(const std::string& address) const
{
SocketAddress addr(address, 123);
return request(addr);
}
int NTPClient::request(SocketAddress& address) const
{
Poco::Net::SocketAddress sa;
DatagramSocket ntpSocket(_family);
ntpSocket.setReceiveTimeout(_timeout);
ntpSocket.bind(sa);
SocketAddress returnAddress;
NTPEventArgs eventArgs(address);
NTPPacket packet;
Poco::UInt8 p[1024];
packet.packet(&p[0]);
ntpSocket.sendTo(p, 48, address);
int received = 0;
try
{
Poco::Net::SocketAddress sender;
int n = ntpSocket.receiveFrom(p, sizeof(p)-1, sender);
if (n < 48) // NTP packet must have at least 48 bytes
throw Poco::Net::NTPException("Invalid response received");
packet.setPacket(p);
eventArgs.setPacket(packet);
++received;
response.notify(this, eventArgs);
}
catch (Poco::TimeoutException &)
{
// ignore
}
return received;
}
} } // namespace Poco::Net
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