protected void InitBase(NetAppConfiguration config, NetLog log)
{
if (config == null)
{
throw new ArgumentNullException("config");
}
if (log == null)
{
throw new ArgumentNullException("log");
}
IsLittleEndian = BitConverter.IsLittleEndian;
//if (BitConverter.IsLittleEndian)
BitWriter = new LittleEndianBitWriter();
//else
// BitWriter = new BigEndianBitWriter();
Configuration = config;
Log = log;
Configuration.m_isLocked = true; // prevent changes
// validate config
if (config.ApplicationIdentifier == NetConstants.DefaultApplicationIdentifier)
{
log.Error("Warning! ApplicationIdentifier not set in configuration!");
}
if (this is NetServer)
{
if (config.MaximumConnections == -1)
{
throw new ArgumentException("MaximumConnections must be set in configuration!");
}
if (config.ServerName == NetConstants.DefaultServerName)
{
log.Warning("Warning! Server name not set!");
}
}
// create buffers
m_sendBuffer = new NetBuffer(config.SendBufferSize);
m_receiveBuffer = new NetBuffer(config.ReceiveBufferSize);
// Bind to port
try
{
IPEndPoint iep = new IPEndPoint(IPAddress.Any, config.Port);
EndPoint ep = (EndPoint)iep;
m_socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
m_socket.Blocking = false;
m_socket.Bind(ep);
if (iep.Port != 0)
{
Log.Info("Bound to port " + iep.Port);
}
}
catch (SocketException sex)
{
if (sex.SocketErrorCode != SocketError.AddressAlreadyInUse)
{
throw new NetException("Failed to bind to port " + config.Port + " - Address already in use!", sex);
}
}
catch (Exception ex)
{
throw new NetException("Failed to bind to port " + config.Port, ex);
}
m_socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveBuffer, config.ReceiveBufferSize);
m_socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendBuffer, config.SendBufferSize);
m_senderRemote = (EndPoint) new IPEndPoint(IPAddress.Any, 0);
#if DEBUG
m_lagLoss = new NetLogLossInducer(log);
#endif
return;
}
internal int ExecuteSend(NetBuffer buffer, NetConnection connection, IPEndPoint remoteEP)
{
if (buffer.LengthBytes < 0)
{
Log.Warning("ExecuteSend passed 0 bytes to send");
return(0);
}
#if DEBUG
if (connection != null)
{
if (connection.Configuration.SimulateLagLoss && m_lagLoss != null)
{
return(m_lagLoss.ExecuteSend(this, buffer, connection, remoteEP));
}
}
#endif
// encrypt
if (connection != null && connection.m_encryption.SymmetricEncryptionKeyBytes != null)
{
// Log.Debug("SEND: Encrypting packet using key: " + Convert.ToBase64String(connection.SymmetricEncryptionKey));
connection.m_encryption.EncryptSymmetric(buffer);
}
try
{
int bytesSent = m_socket.SendTo(buffer.Data, 0, buffer.LengthBytes, SocketFlags.None, remoteEP);
Debug.Assert(bytesSent == buffer.LengthBytes, "Ouch, sent partial UDP message?!");
//Log.Verbose(string.Format(CultureInfo.InvariantCulture, "Sent {0} bytes to {1}", bytesSent, remoteEP));
return(bytesSent);
}
catch (SocketException sex)
{
if (sex.SocketErrorCode == SocketError.WouldBlock)
{
// send buffer overflow?
#if DEBUG
Log.Error("SocketException.WouldBlock thrown during sending; send buffer overflow? Increase buffer using NetAppConfiguration.SendBufferSize");
throw new NetException("SocketException.WouldBlock thrown during sending; send buffer overflow? Increase buffer using NetAppConfiguration.SendBufferSize", sex);
#else
// let reliability handle it, but log warning
Log.Warning("Network send buffer overflow");
#endif
}
if (sex.SocketErrorCode == SocketError.ConnectionReset ||
sex.SocketErrorCode == SocketError.ConnectionRefused ||
sex.SocketErrorCode == SocketError.ConnectionAborted)
{
Log.Warning("Remote socket forcefully closed: " + sex.SocketErrorCode);
if (connection != null)
{
connection.Disconnect("Socket forcefully closed: " + sex.SocketErrorCode);
}
return(0);
}
Log.Warning("Execute SocketException: " + sex.SocketErrorCode);
return(0);
}
}
/// <summary>
/// Get IP address from notation (xxx.xxx.xxx.xxx) or hostname
/// </summary>
public static IPAddress Resolve(NetLog log, string ipOrHost)
{
if (log == null)
throw new ArgumentNullException("log");
if (string.IsNullOrEmpty(ipOrHost))
throw new ArgumentException("Supplied string must not be empty", "ipOrHost");
ipOrHost = ipOrHost.Trim();
if (m_regIP == null)
{
string expression = "\\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\b";
RegexOptions options = RegexOptions.Compiled;
m_regIP = new Regex(expression, options);
}
// is it an ip number string?
IPAddress ipAddress = null;
if (m_regIP.Match(ipOrHost).Success && IPAddress.TryParse(ipOrHost, out ipAddress))
return ipAddress;
// ok must be a host name
IPHostEntry entry;
try
{
entry = Dns.GetHostEntry(ipOrHost);
if (entry == null)
return null;
// check each entry for a valid IP address
foreach (IPAddress ipCurrent in entry.AddressList)
{
string sIP = ipCurrent.ToString();
bool isIP = m_regIP.Match(sIP).Success && IPAddress.TryParse(sIP, out ipAddress);
if (isIP)
break;
}
if (ipAddress == null)
return null;
return ipAddress;
}
catch (SocketException ex)
{
if (ex.SocketErrorCode == SocketError.HostNotFound)
{
log.Error(string.Format(CultureInfo.InvariantCulture, "Failed to resolve host '{0}'.", ipOrHost));
return null;
}
else
{
throw;
}
}
}
/// <summary>
/// Get IP address from notation (xxx.xxx.xxx.xxx) or hostname
/// </summary>
public static IPAddress Resolve(NetLog log, string ipOrHost)
{
if (log == null)
{
throw new ArgumentNullException("log");
}
if (string.IsNullOrEmpty(ipOrHost))
{
throw new ArgumentException("Supplied string must not be empty", "ipOrHost");
}
ipOrHost = ipOrHost.Trim();
if (m_regIP == null)
{
string expression = "\\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\b";
RegexOptions options = RegexOptions.Compiled;
m_regIP = new Regex(expression, options);
}
// is it an ip number string?
IPAddress ipAddress = null;
if (m_regIP.Match(ipOrHost).Success&& IPAddress.TryParse(ipOrHost, out ipAddress))
{
return(ipAddress);
}
// ok must be a host name
IPHostEntry entry;
try
{
entry = Dns.GetHostEntry(ipOrHost);
if (entry == null)
{
return(null);
}
// check each entry for a valid IP address
foreach (IPAddress ipCurrent in entry.AddressList)
{
string sIP = ipCurrent.ToString();
bool isIP = m_regIP.Match(sIP).Success&& IPAddress.TryParse(sIP, out ipAddress);
if (isIP)
{
break;
}
}
if (ipAddress == null)
{
return(null);
}
return(ipAddress);
}
catch (SocketException ex)
{
if (ex.SocketErrorCode == SocketError.HostNotFound)
{
log.Error(string.Format(CultureInfo.InvariantCulture, "Failed to resolve host '{0}'.", ipOrHost));
return(null);
}
else
{
throw;
}
}
}
protected void InitBase(NetAppConfiguration config, NetLog log)
{
if (config == null)
throw new ArgumentNullException("config");
if (log == null)
throw new ArgumentNullException("log");
IsLittleEndian = BitConverter.IsLittleEndian;
//if (BitConverter.IsLittleEndian)
BitWriter = new LittleEndianBitWriter();
//else
// BitWriter = new BigEndianBitWriter();
Configuration = config;
Log = log;
Configuration.m_isLocked = true; // prevent changes
// validate config
if (config.ApplicationIdentifier == NetConstants.DefaultApplicationIdentifier)
log.Error("Warning! ApplicationIdentifier not set in configuration!");
if (this is NetServer)
{
if (config.MaximumConnections == -1)
throw new ArgumentException("MaximumConnections must be set in configuration!");
if (config.ServerName == NetConstants.DefaultServerName)
log.Warning("Warning! Server name not set!");
}
// create buffers
m_sendBuffer = new NetBuffer(config.SendBufferSize);
m_receiveBuffer = new NetBuffer(config.ReceiveBufferSize);
// Bind to port
try
{
IPEndPoint iep = new IPEndPoint(IPAddress.Any, config.Port);
EndPoint ep = (EndPoint)iep;
m_socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
m_socket.Blocking = false;
m_socket.Bind(ep);
if (iep.Port != 0)
Log.Info("Bound to port " + iep.Port);
}
catch (SocketException sex)
{
if (sex.SocketErrorCode != SocketError.AddressAlreadyInUse)
throw new NetException("Failed to bind to port " + config.Port + " - Address already in use!", sex);
}
catch (Exception ex)
{
throw new NetException("Failed to bind to port " + config.Port, ex);
}
m_socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveBuffer, config.ReceiveBufferSize);
m_socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendBuffer, config.SendBufferSize);
m_senderRemote = (EndPoint)new IPEndPoint(IPAddress.Any, 0);
#if DEBUG
m_lagLoss = new NetLogLossInducer(log);
#endif
return;
}