/// <summary>
/// Prints and error message and then exits with exit code 1
/// </summary>
/// <param name="msg">Error message to print</param>
/// <param name="pause">Wait for user input before exitingt</param>
public static void ErrorAndExit(string msg)
{
Display.Error(msg);
WaitForUserInput();
Environment.Exit(1);
}
public static void Start(CancellationToken cancellationToken)
{
IPAddress localAddress = null;
Socket listeningSocket = null;
PingResults results = new PingResults();
int bufferSize = 4096;
// Find local address
localAddress = IPAddress.Parse(Lookup.GetLocalAddress());
try {
// Create listener socket
listeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
listeningSocket.Bind(new IPEndPoint(localAddress, 0));
listeningSocket.IOControl(IOControlCode.ReceiveAll, new byte[] { 1, 0, 0, 0 }, new byte[] { 1, 0, 0, 0 }); // Set SIO_RCVALL flag to socket IO control
listeningSocket.ReceiveBufferSize = bufferSize;
Display.ListenIntroMsg(localAddress.ToString());
// Listening loop
while (!cancellationToken.IsCancellationRequested)
{
byte[] buffer = new byte[bufferSize];
// Recieve any incoming ICMPv4 packets
EndPoint remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
int bytesRead = Helper.RunWithCancellationToken(() => listeningSocket.ReceiveFrom(buffer, ref remoteEndPoint), cancellationToken);
ICMP response = new ICMP(buffer, bytesRead);
// Display captured packet
Display.CapturedPacket(response, remoteEndPoint.ToString(), DateTime.Now.ToString("h:mm:ss.ff tt"), bytesRead);
// Store results
results.CountPacketType(response.Type);
results.Received++;
}
}
catch (OperationCanceledException) {
}
catch (SocketException) {
Display.Error("Could not read packet from socket");
}
catch (Exception e) {
Display.Error($"General exception occured while trying to create listening socket (Exception: {e.GetType().ToString().Split('.').Last()}");
}
// Clean up
listeningSocket.Close();
// TODO: Implement ListenResults method
//Display.ListenResults(results);
}
public static void ListenForICMPOnAddress(IPAddress address)
{
Socket listeningSocket = null;
PingResults results = new PingResults();
int bufferSize = 4096;
// Create listener socket
try
{
listeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
listeningSocket.Bind(new IPEndPoint(address, 0));
listeningSocket.IOControl(IOControlCode.ReceiveAll, new byte[] { 1, 0, 0, 0 }, new byte[] { 1, 0, 0, 0 }); // Set SIO_RCVALL flag to socket IO control
listeningSocket.ReceiveBufferSize = bufferSize;
} catch (Exception e) {
Display.Error($"Exception occured while trying to create listening socket for {address.ToString()} ({e.GetType().ToString().Split('.').Last()})");
return;
}
Display.ListenIntroMsg(address.ToString());
// Listening loop
while (true)
{
byte[] buffer = new byte[bufferSize];
try {
// Recieve any incoming ICMPv4 packets
EndPoint remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
int bytesRead = listeningSocket.ReceiveFrom(buffer, ref remoteEndPoint);
ICMP response = new ICMP(buffer, bytesRead);
// Display captured packet
Display.CapturedPacket(address.ToString(), response, remoteEndPoint.ToString(), DateTime.Now.ToString("h:mm:ss.ff tt"), bytesRead);
// Store results
results.CountPacketType(response.Type);
results.Received++;
} catch (OperationCanceledException) {
} catch (SocketException) {
Display.Error("Could not read packet from socket");
}
}
listeningSocket.Close();
}
private static IPAddress[] GetLocalAddresses()
{
IPHostEntry hostAddress = null;
// Get all addresses assocatied with this computer
try {
hostAddress = Dns.GetHostEntry(Dns.GetHostName());
} catch (Exception e) {
Display.Error($"Could not fetch local addresses ({e.GetType().ToString().Split('.').Last()})");
}
// Only get IPv4 address
List <IPAddress> addresses = new List <IPAddress>();
foreach (IPAddress address in hostAddress.AddressList)
{
if (address.AddressFamily == AddressFamily.InterNetwork)
{
addresses.Add(address);
}
}
return(addresses.ToArray());
}
/// <summary>
/// Network scanning method.
///
/// Uses pings to scan a IP address range and identify hosts
/// that are active.
///
/// range should be in format 192.0.0.1-255, where - denotes the range
/// This can be specified at any octlet of the address (192.0.1-100.1.255)
/// </summary>
/// <param name="range">Range of addresses to scan</param>
public void Scan(string range, bool recursing = false)
{
List <string> scanList = new List <string>(); // List of addresses to scan
String[] ipSegments = range.Split('.');
PingResults results = new PingResults();
List <string> activeHosts = new List <string>();
List <double> activeHostTimes = new List <double>();
Stopwatch scanTimer = new Stopwatch();
int scanned = 0;
// Setup scan ping attributes
PingAttributes attrs = new PingAttributes();
attrs.Timeout = 500;
attrs.Interval = 0;
attrs.Count = 1;
Display.ShowOutput = false;
// Check format of address (for '-'s and disallow multipl '-'s in one segment)
if (!range.Contains("-"))
{
Display.Error("Scan - No range specified, must be specified in format: 192.168.1.1-254", true, true);
}
// Holds the ranges for each ip segment
int[] segLower = new int[4];
int[] segUpper = new int[4];
// Work out upper and lower ranges for each segment
try{
for (int y = 0; y < 4; y++)
{
string[] ranges = ipSegments[y].Split('-');
segLower[y] = Convert.ToInt16(ranges[0]);
segUpper[y] = (ranges.Length == 1) ? segLower[y] : Convert.ToInt16(ranges[1]);
}
} catch (FormatException) {
Display.Error("Scan - Incorrect format [" + range + "], must be specified in format: 192.168.1.1-254", true, true);
}
// Build list of addresses from ranges
for (int seg1 = segLower[0]; seg1 <= segUpper[0]; seg1++)
{
for (int seg2 = segLower[1]; seg2 <= segUpper[1]; seg2++)
{
for (int seg3 = segLower[2]; seg3 <= segUpper[2]; seg3++)
{
for (int seg4 = segLower[3]; seg4 <= segUpper[3]; seg4++)
{
scanList.Add(new IPAddress(new byte[] { (byte)seg1, (byte)seg2, (byte)seg3, (byte)seg4 }).ToString());
}
}
}
}
scanTimer.Start();
// Scan loop
foreach (string host in scanList)
{
// Update host
attrs.Address = host;
scanned++;
// Reset global results for accurate results
// (results need to be set globally while running for graph but need to be semi local for scan
// or results bleed through so active hosts can't be determined)
this.Results = new PingResults();
// Send ping
results = SendICMP(attrs);
Display.ScanProgress(scanned, activeHosts.Count, scanList.Count, scanTimer.Elapsed, range, attrs.Address);
if (results.Lost == 0 && results.ErrorPackets != 1)
{
// If host is active, add to list
activeHosts.Add(host);
activeHostTimes.Add(results.CurTime);
}
}
scanTimer.Stop();
PowerPing.Display.ScanResults(scanList.Count, activeHosts, activeHostTimes);
}
private void SendPacket()
{
byte[] receiveBuffer = new byte[m_PingAttributes.ReceiveBufferSize]; // Ipv4Header.length + IcmpHeader.length + attrs.recievebuffersize
int bytesRead = 0;
// Sending loop
for (int index = 1; m_PingAttributes.Continous || index <= m_PingAttributes.Count; index++)
{
if (index != 1)
{
// Wait for set interval before sending again or cancel if requested
if (m_CancellationToken.WaitHandle.WaitOne(m_PingAttributes.Interval))
{
break;
}
// Generate random interval when RandomTiming flag is set
if (m_PingAttributes.RandomTiming)
{
m_PingAttributes.Interval = Helper.RandomInt(5000, 100000);
}
}
// Update packet before sending
UpdatePacketSequenceNumber(index);
if (m_PingAttributes.RandomMessage)
{
UpdatePacketMessage(Encoding.ASCII.GetBytes(Helper.RandomString()));
}
UpdatePacketChecksum();
try {
// Show request packet
if (Display.ShowRequests)
{
Display.RequestPacket(m_Packet, Display.UseInputtedAddress | Display.UseResolvedAddress ? m_PingAttributes.InputtedAddress : m_PingAttributes.ResolvedAddress, index);
}
// If there were extra responses from a prior request, ignore them
while (m_Socket.Available != 0)
{
bytesRead = m_Socket.Receive(receiveBuffer);
}
// Send ping request
m_Socket.SendTo(m_Packet.GetBytes(), m_PacketSize, SocketFlags.None, m_RemoteEndpoint); // Packet size = message field + 4 header bytes
long requestTimestamp = Stopwatch.GetTimestamp();
m_PingResults.IncrementSentPackets();
// Just for artifically testing higher ping response times
if (m_Debug)
{
Random rnd = new Random();
Thread.Sleep(rnd.Next(10, 400));
if (rnd.Next(3) == 1)
{
throw new SocketException();
}
}
// Try and recieve a packet
ICMP response = null;
EndPoint responseEP = m_RemoteEndpoint;
TimeSpan replyTime = TimeSpan.Zero;
ReceivePacket(ref response, ref responseEP, ref replyTime, ref bytesRead, requestTimestamp);
if (Display.ShowReplies)
{
// Determine what form the response address is going to be displayed in
string responseAddress = responseEP.ToString();
if (Display.UseResolvedAddress)
{
// Returned address normally have port at the end (eg 8.8.8.8:0) so we need to remove that before trying to query the DNS
string responseIP = responseEP.ToString().Split(':')[0];
// Resolve the ip and store as the response address
responseAddress = Helper.RunWithCancellationToken(() => Lookup.QueryHost(responseIP), m_CancellationToken);
}
else if (Display.UseInputtedAddress)
{
responseAddress = m_PingAttributes.InputtedAddress;
}
Display.ReplyPacket(response, responseAddress, index, replyTime, bytesRead);
}
// Store response info
m_PingResults.IncrementReceivedPackets();
m_PingResults.CountPacketType(response.Type);
m_PingResults.SaveResponseTime(replyTime.TotalMilliseconds);
if (m_PingAttributes.BeepMode == 2)
{
try { Console.Beep(); }
catch (Exception) { } // Silently continue if Console.Beep errors
}
}
catch (IOException) {
if (Display.ShowOutput)
{
Display.Error("General transmit error");
}
m_PingResults.SaveResponseTime(-1);
m_PingResults.IncrementLostPackets();
}
catch (SocketException) {
Display.Timeout(index);
if (m_PingAttributes.BeepMode == 1)
{
try { Console.Beep(); }
catch (Exception) { }
}
m_PingResults.SaveResponseTime(-1);
m_PingResults.IncrementLostPackets();
}
catch (OperationCanceledException) {
m_PingResults.ScanWasCanceled = true;
break;
}
catch (Exception) {
if (Display.ShowOutput)
{
Display.Error("General error occured");
}
m_PingResults.SaveResponseTime(-1);
m_PingResults.IncrementLostPackets();
}
// Run callback (if provided) to notify of updated results
OnPingResultsUpdateCallback?.Invoke(m_PingResults);
}
}
/// <summary>
/// Pases command line arguments and store properties in attributes object
/// </summary>
/// <param name="args">Command line arguments</param>
/// <param name="attributes">PingAttributes object to store propterties from arguments</param>
/// <returns>bool based on if parsing was successful or not</returns>
public static bool Parse(string[] args, ref PingAttributes attributes)
{
int curArg = 0;
// Loop through arguments
try {
checked {
for (int count = 0; count < args.Length; count++)
{
curArg = count;
switch (args[count])
{
case "/version":
case "-version":
case "--version":
case "/v":
case "-v":
case "--v":
Display.Version(true);
Helper.CheckRecentVersion();
Helper.WaitForUserInput();
Environment.Exit(0);
break;
case "/beep":
case "-beep":
case "--beep":
case "/b":
case "-b":
case "--b":
int level = Convert.ToInt32(args[count + 1]);
if (level > 2)
{
Display.Message("Invalid beep level, please use a number between 0 & 2");
throw new ArgumentFormatException();
}
attributes.BeepLevel = level;
break;
case "/count":
case "-count":
case "--count":
case "/c":
case "-c":
case "--c": // Ping count
attributes.Count = Convert.ToInt32(args[count + 1]);
break;
case "/infinite":
case "-infinite":
case "--infinite":
case "/t":
case "-t":
case "--t": // Infinitely send
attributes.Continous = true;
break;
case "/timeout":
case "-timeout":
case "--timeout":
case "/w":
case "-w":
case "--w": // Timeout
attributes.Timeout = Convert.ToInt32(args[count + 1]);
break;
case "/message":
case "-message":
case "--message":
case "/m":
case "-m":
case "--m": // Message
if (args[count + 1].Contains("--") || args[count + 1].Contains('/') || args[count + 1].Contains("-"))
{
throw new ArgumentFormatException();
}
attributes.Message = args[count + 1];
break;
case "/ttl":
case "-ttl":
case "--ttl":
case "/i":
case "-i":
case "--i": // Time To Live
int ttl = Convert.ToInt16(args[count + 1]);
if (ttl > 255)
{
Display.Message("TTL has to be between 0 and 255");
throw new ArgumentFormatException();
}
attributes.Ttl = ttl;
break;
case "/interval":
case "-interval":
case "--interval":
case "/in":
case "-in":
case "--in": // Interval
attributes.Interval = Convert.ToInt32(args[count + 1]);
if (attributes.Interval < 1)
{
Display.Message("Ping interval cannot be less than 1ms");
throw new ArgumentFormatException();
}
break;
case "/type":
case "-type":
case "--type":
case "/pt":
case "-pt":
case "--pt": // Ping type
var type = Convert.ToByte(args[count + 1]);
if (type > 255)
{
throw new ArgumentFormatException();
}
attributes.Type = type;
break;
case "/code":
case "-code":
case "--code":
case "/pc":
case "-pc":
case "--pc": // Ping code
attributes.Code = Convert.ToByte(args[count + 1]);
break;
case "/displaymsg":
case "-displaymsg":
case "--displaymsg":
case "/dm":
case "-dm":
case "--dm": // Display packet message
Display.ShowMessages = true;
break;
case "/ipv4":
case "-ipv4":
case "--ipv4":
case "/4":
case "-4":
case "--4": // Force ping with IPv4
if (attributes.ForceV6)
{
// Reset IPv6 force if already set
attributes.ForceV6 = false;
}
attributes.ForceV4 = true;
break;
case "/ipv6":
case "-ipv6":
case "--ipv6":
case "/6":
case "-6":
case "--6": // Force ping with IPv6
if (attributes.ForceV4)
{
// Reset IPv4 force if already set
attributes.ForceV4 = false;
}
attributes.ForceV6 = true;
break;
case "/help":
case "-help":
case "--help":
case "/?":
case "-?":
case "--?": // Display help message
Display.Help();
Helper.WaitForUserInput();
Environment.Exit(0);
break;
case "/examples":
case "-examples":
case "--examples":
case "/ex":
case "-ex":
case "--ex": // Displays examples
Display.Examples();
Environment.Exit(0); // Exit after displaying examples
break;
case "/shorthand":
case "-shorthand":
case "--shorthand":
case "/sh":
case "-sh":
case "--sh": // Use short hand messages
Display.Short = true;
break;
case "/nocolor":
case "-nocolor":
case "--nocolor":
case "/nc":
case "-nc":
case "--nc": // No color mode
Display.NoColor = true;
break;
case "/ni":
case "-ni":
case "--ni":
case "/noinput":
case "-noinput":
case "--noinput": // No input mode
Display.NoInput = true;
if (Properties.Settings.Default.RequireInput != true)
{
Display.Message(
"(RequireInput is now permenantly OFF, you will no longer be prompted for user input anytime PowerPing is finished)",
ConsoleColor.Cyan);
}
Properties.Settings.Default.RequireInput = false;
Properties.Settings.Default.Save();
break;
case "/ri":
case "-ri":
case "--ri":
case "/requireinput":
case "-requireinput":
case "--requireinput":
Display.NoInput = false;
if (Properties.Settings.Default.RequireInput != true)
{
Display.Message(
"(RequireInput is now permenantly ON, from now on you will be prompted for user input whenever PowerPing is finished)",
ConsoleColor.Cyan);
}
Properties.Settings.Default.RequireInput = true;
Properties.Settings.Default.Save();
break;
case "/decimals":
case "-decimals":
case "--decimals":
case "/dp":
case "-dp":
case "--dp": // Decimal places
if (Convert.ToInt32(args[count + 1]) > 3 || Convert.ToInt32(args[count + 1]) < 0)
{
throw new ArgumentFormatException();
}
Display.DecimalPlaces = Convert.ToInt32(args[count + 1]);
break;
case "/symbols":
case "-symbols":
case "--symbols":
case "/sym":
case "-sym":
case "--sym":
Display.UseSymbols = true;
Display.SetAsciiReplySymbolsTheme(0);
// Change symbols theme if an argument is present
if (args.Length < count + 1)
{
count++;
continue;
}
if (args[count + 1].Contains("--") ||
args[count + 1].Contains('/') ||
args[count + 1].Contains("-") ||
args[count + 1].Contains("."))
{
count++;
continue;
}
int theme = Convert.ToInt32(args[count + 1]);
Display.SetAsciiReplySymbolsTheme(theme);
break;
case "/random":
case "-random":
case "--random":
case "/rng":
case "-rng":
case "--rng":
attributes.RandomMsg = true;
break;
case "/limit":
case "-limit":
case "--limit":
case "/l":
case "-l":
case "--l":
if (Convert.ToInt32(args[count + 1]) == 1)
{
Display.ShowSummary = false;
Display.ShowIntro = false;
}
else if (Convert.ToInt32(args[count + 1]) == 2)
{
Display.ShowSummary = false;
Display.ShowIntro = false;
Display.ShowReplies = false;
Display.ShowRequests = true;
}
else if (Convert.ToInt32(args[count + 1]) == 3)
{
Display.ShowReplies = false;
Display.ShowRequests = false;
}
else
{
throw new ArgumentFormatException();
}
break;
case "/notimeout":
case "-notimeout":
case "--notimeout":
case "/nt":
case "-nt":
case "--nt":
Display.ShowTimeouts = false;
break;
case "/timestamp":
case "-timestamp":
case "--timestamp":
case "/ts":
case "-ts":
case "--ts": // Display timestamp
if (args[count + 1].ToLower() == "utc")
{
Display.ShowtimeStampUTC = true;
}
else
{
Display.ShowTimeStamp = true;
}
break;
case "/fulltimestamp":
case "-fulltimestamp":
case "--fulltimestamp":
case "/fts":
case "-fts":
case "--fts": // Display timestamp with date
if (count + 1 > args.Length)
{
Display.ShowFullTimeStamp = true;
}
else if (args[count + 1].ToLower() == "utc")
{
Display.ShowFullTimeStampUTC = true;
}
else
{
Display.ShowFullTimeStamp = true;
}
break;
case "/timing":
case "-timing":
case "--timing":
case "/ti":
case "-ti":
case "--ti": // Timing option
switch (args[count + 1].ToLowerInvariant())
{
case "0":
case "paranoid":
attributes.Timeout = 10000;
attributes.Interval = 300000;
break;
case "1":
case "sneaky":
attributes.Timeout = 5000;
attributes.Interval = 120000;
break;
case "2":
case "quiet":
attributes.Timeout = 5000;
attributes.Interval = 30000;
break;
case "3":
case "polite":
attributes.Timeout = 3000;
attributes.Interval = 3000;
break;
case "4":
case "nimble":
attributes.Timeout = 2000;
attributes.Interval = 750;
break;
case "5":
case "speedy":
attributes.Timeout = 1500;
attributes.Interval = 500;
break;
case "6":
case "insane":
attributes.Timeout = 750;
attributes.Interval = 100;
break;
case "7":
case "random":
attributes.RandomTiming = true;
attributes.RandomMsg = true;
attributes.Interval = Helper.RandomInt(5000, 100000);
attributes.Timeout = 15000;
break;
default: // Unknown timing type
throw new ArgumentFormatException();
}
break;
case "/request":
case "-request":
case "--request":
case "/requests":
case "-requests":
case "--requests":
case "/r":
case "-r":
case "--r":
Display.ShowRequests = true;
break;
case "/quiet":
case "-quiet":
case "--quiet":
case "/q":
case "-q":
case "--q":
Display.ShowOutput = false;
break;
case "/resolve":
case "-resolve":
case "--resolve":
case "/res":
case "-res":
case "--res":
Display.UseResolvedAddress = true;
break;
case "/inputaddr":
case "-inputaddr":
case "--inputaddr":
case "/ia":
case "-ia":
case "--ia":
Display.UseInputtedAddress = true;
break;
case "/buffer":
case "-buffer":
case "--buffer":
case "/rb":
case "-rb":
case "--rb":
int recvbuff = Convert.ToInt32(args[count + 1]);
if (recvbuff < 65000)
{
attributes.RecieveBufferSize = recvbuff;
}
else
{
throw new ArgumentFormatException();
}
break;
case "/checksum":
case "-checksum":
case "--checksum":
case "/chk":
case "-chk":
case "--chk":
Display.ShowChecksum = true;
break;
case "/dontfrag":
case "-dontfrag":
case "--dontfrag":
case "/df":
case "-df":
case "--df":
attributes.DontFragment = true;
break;
case "/size":
case "-size":
case "--size":
case "/s":
case "-s":
case "--s":
int size = Convert.ToInt32(args[count + 1]);
if (size < 100000)
{
attributes.Size = size;
}
else
{
throw new ArgumentFormatException();
}
break;
case "/whois":
case "-whois":
case "--whois": // Whois lookup
attributes.Operation = PingOperation.Whois;
break;
case "/whoami":
case "-whoami":
case "--whoami": // Current computer location
attributes.Operation = PingOperation.Whoami;
break;
case "/location":
case "-location":
case "--location":
case "/loc":
case "-loc":
case "--loc": // Location lookup
attributes.Operation = PingOperation.Location;
break;
case "/listen":
case "-listen":
case "--listen":
case "/li":
case "-li":
case "--li": // Listen for ICMP packets
attributes.Operation = PingOperation.Listen;
break;
case "/graph":
case "-graph":
case "--graph":
case "/g":
case "-g":
case "--g": // Graph view
attributes.Operation = PingOperation.Graph;
break;
case "/compact":
case "-compact":
case "--compact":
case "/cg":
case "-cg":
case "--cg": // Compact graph view
attributes.Operation = PingOperation.CompactGraph;
break;
case "/flood":
case "-flood":
case "--flood":
case "/fl":
case "-fl":
case "--fl": // Flood
attributes.Operation = PingOperation.Flood;
break;
case "/scan":
case "-scan":
case "--scan":
case "/sc":
case "-sc":
case "--sc": // Scan
attributes.Operation = PingOperation.Scan;
break;
default:
// Check for invalid argument
if ((args[count].Contains("--") || args[count].Contains("/") || args[count].Contains("-")) &&
attributes.Operation != PingOperation.Scan && // (ignore if scanning) // TODO: Change this
(!Helper.IsURL(args[count]) && !Helper.IsIPv4Address(args[count])))
{
throw new InvalidArgumentException();
}
break;
}
}
}
}
catch (IndexOutOfRangeException) {
Display.Error($"Missing argument parameter @ \"PowerPing >>>{args[curArg]}<<<\"");
return(false);
}
catch (OverflowException) {
Display.Error($"Overflow while converting @ \"PowerPing {args[curArg]} >>>{args[curArg + 1]}<<<\"");
return(false);
}
catch (InvalidArgumentException) {
Display.Error($"Invalid argument @ \"PowerPing >>>{args[curArg]}<<<\"");
return(false);
}
catch (ArgumentFormatException) {
Display.Error($"Incorrect parameter for [{args[curArg]}] @ \"PowerPing {args[curArg]} >>>{args[curArg + 1]}<<<\"");
return(false);
}
catch (Exception e) {
Display.Error($"An {e.GetType().ToString().Split('.').Last()} exception occured @ \"PowerPing >>>{args[curArg]}<<<\"");
return(false);
}
return(true);
}
private PingResults SendICMP(PingAttributes attrs, Action <PingResults> resultsUpdateCallback = null)
{
PingResults results = new PingResults();
ICMP packet = new ICMP();
byte[] receiveBuffer = new byte[attrs.RecieveBufferSize]; // Ipv4Header.length + IcmpHeader.length + attrs.recievebuffersize
int bytesRead, packetSize;
// Convert to IPAddress
IPAddress ipAddr = IPAddress.Parse(attrs.Address);
// Setup endpoint
IPEndPoint iep = new IPEndPoint(ipAddr, 0);
// Setup raw socket
Socket sock = CreateRawSocket(ipAddr.AddressFamily);
// Helper function to set receive timeout (only if it's changing)
int appliedReceiveTimeout = 0;
void SetReceiveTimeout(int receiveTimeout)
{
if (receiveTimeout != appliedReceiveTimeout)
{
sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, receiveTimeout);
appliedReceiveTimeout = receiveTimeout;
}
}
// Set socket options
sock.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.IpTimeToLive, attrs.Ttl);
sock.DontFragment = attrs.DontFragment;
sock.ReceiveBufferSize = attrs.RecieveBufferSize;
// Create packet message payload
byte[] payload;
if (attrs.Size != -1)
{
payload = Helper.GenerateByteArray(attrs.Size);
}
else
{
payload = Encoding.ASCII.GetBytes(attrs.Message);
}
// Construct our ICMP packet
packet.Type = attrs.Type;
packet.Code = attrs.Code;
Buffer.BlockCopy(BitConverter.GetBytes(m_SessionId), 0, packet.Message, 0, 2); // Add identifier to ICMP message
Buffer.BlockCopy(payload, 0, packet.Message, 4, payload.Length); // Add text into ICMP message
packet.MessageSize = payload.Length + 4;
packetSize = packet.MessageSize + 4;
// Sending loop
for (int index = 1; attrs.Continous || index <= attrs.Count; index++)
{
if (index != 1)
{
// Wait for set interval before sending again or cancel if requested
if (m_CancellationToken.WaitHandle.WaitOne(attrs.Interval))
{
break;
}
// Generate random interval when RandomTimings flag is set
if (attrs.RandomTiming)
{
attrs.Interval = Helper.RandomInt(5000, 100000);
}
}
// Include sequence number in ping message
ushort sequenceNum = (ushort)index;
Buffer.BlockCopy(BitConverter.GetBytes(sequenceNum), 0, packet.Message, 2, 2);
// Fill ICMP message field
if (attrs.RandomMsg)
{
payload = Encoding.ASCII.GetBytes(Helper.RandomString());
Buffer.BlockCopy(payload, 0, packet.Message, 4, payload.Length);
}
// Update packet checksum
packet.Checksum = 0;
UInt16 chksm = packet.GetChecksum();
packet.Checksum = chksm;
try {
// Show request packet
if (Display.ShowRequests)
{
Display.RequestPacket(packet, Display.UseInputtedAddress | Display.UseResolvedAddress ? attrs.InputtedAddress : attrs.Address, index);
}
// If there were extra responses from a prior request, ignore them
while (sock.Available != 0)
{
bytesRead = sock.Receive(receiveBuffer);
}
// Send ping request
sock.SendTo(packet.GetBytes(), packetSize, SocketFlags.None, iep); // Packet size = message field + 4 header bytes
long requestTimestamp = Stopwatch.GetTimestamp();
try { results.Sent++; }
catch (OverflowException) { results.HasOverflowed = true; }
if (m_Debug)
{
// Induce random wait for debugging
Random rnd = new Random();
Thread.Sleep(scale);//rnd.Next(scale));//1500));
//Thread.Sleep(rnd.Next(100));
if (inverting)
{
scale -= 5;
}
else
{
scale += 5;
}
if (scale > 1100)
{
inverting = true;
}
else if (scale == 10)
{
inverting = false;
}
//if (rnd.Next(20) == 1) { throw new SocketException(); }
}
ICMP response;
EndPoint responseEP = iep;
TimeSpan replyTime = TimeSpan.Zero;
do
{
// Cancel if requested
m_CancellationToken.ThrowIfCancellationRequested();
// Set receive timeout, limited to 250ms so we don't block very long without checking for
// cancellation. If the requested ping timeout is longer, we will wait some more in subsequent
// loop iterations until the requested ping timeout is reached.
int remainingTimeout = (int)Math.Ceiling(attrs.Timeout - replyTime.TotalMilliseconds);
if (remainingTimeout <= 0)
{
throw new SocketException();
}
SetReceiveTimeout(Math.Min(remainingTimeout, 250));
// Wait for response
try {
bytesRead = sock.ReceiveFrom(receiveBuffer, ref responseEP);
} catch (SocketException) {
bytesRead = 0;
}
replyTime = new TimeSpan(Helper.StopwatchToTimeSpanTicks(Stopwatch.GetTimestamp() - requestTimestamp));
if (bytesRead == 0)
{
response = null;
}
else
{
// Store reply packet
response = new ICMP(receiveBuffer, bytesRead);
// If we sent an echo and receive a response with a different identifier or sequence
// number, ignore it (it could correspond to an older request that timed out)
if (packet.Type == 8 && response.Type == 0)
{
ushort responseSessionId = BitConverter.ToUInt16(response.Message, 0);
ushort responseSequenceNum = BitConverter.ToUInt16(response.Message, 2);
if (responseSessionId != m_SessionId || responseSequenceNum != sequenceNum)
{
response = null;
}
}
}
} while (response == null);
// Display reply packet
if (Display.ShowReplies)
{
Display.ReplyPacket(response, Display.UseInputtedAddress | Display.UseResolvedAddress ? attrs.InputtedAddress : responseEP.ToString(), index, replyTime, bytesRead);
}
// Store response info
try { results.Received++; }
catch (OverflowException) { results.HasOverflowed = true; }
results.CountPacketType(response.Type);
results.SaveResponseTime(replyTime.TotalMilliseconds);
if (attrs.BeepLevel == 2)
{
try { Console.Beep(); }
catch (Exception) { } // Silently continue if Console.Beep errors
}
} catch (IOException) {
if (Display.ShowOutput)
{
Display.Error("General transmit error");
}
results.SaveResponseTime(-1);
try { results.Lost++; }
catch (OverflowException) { results.HasOverflowed = true; }
} catch (SocketException) {
Display.Timeout(index);
if (attrs.BeepLevel == 1)
{
try { Console.Beep(); }
catch (Exception) { results.HasOverflowed = true; }
}
results.SaveResponseTime(-1);
try { results.Lost++; }
catch (OverflowException) { results.HasOverflowed = true; }
} catch (OperationCanceledException) {
results.ScanWasCanceled = true;
break;
} catch (Exception) {
if (Display.ShowOutput)
{
Display.Error("General error occured");
}
results.SaveResponseTime(-1);
try { results.Lost++; }
catch (OverflowException) { results.HasOverflowed = true; }
}
// Run callback (if provided) to notify of updated results
resultsUpdateCallback?.Invoke(results);
}
// Clean up
sock.Close();
return(results);
}
