/// <summary>
/// Deserializes a new instance of the SocksRequest class from the
/// specified byte array.
/// </summary>
/// <param name="buffer">An array of bytes to deserialize a new instance
/// of the SocksRequest class from.</param>
/// <returns>An initialized instance of the SocksRequest class.</returns>
/// <exception cref="ArgumentNullException">The buffer parameter is
/// null.</exception>
/// <exception cref="SerializationException">The specified buffer does
/// not contain a valid SOCKS5 request message.</exception>
public static SocksRequest Deserialize(byte[] buffer)
{
using (var ms = new MemoryStream(buffer)) {
using (BinaryReader r = new BinaryReader(ms)) {
if (r.ReadByte() != version)
{
throw new SerializationException("Invalid SOCKS5 request.");
}
SocksCommand command = (SocksCommand)r.ReadByte();
// Skip reserved octet.
r.ReadByte();
ATyp atyp = (ATyp)r.ReadByte();
IPAddress addr = null;
string domain = null;
switch (atyp)
{
case ATyp.IPv4:
case ATyp.IPv6:
addr = new IPAddress(r.ReadBytes(atyp == ATyp.IPv4 ? 4 : 16));
break;
case ATyp.Domain:
byte len = r.ReadByte();
domain = Encoding.ASCII.GetString(r.ReadBytes(len));
break;
}
ushort port = r.ReadUInt16(true);
if (atyp == ATyp.Domain)
{
return(new SocksRequest(command, domain, port));
}
return(new SocksRequest(command, addr, port));
}
}
}
public static Int32 MakeRequest(Byte[] packet, SocksCommand command, IPAddress ip, Int32 port)
{
Byte[] address = ip.GetAddressBytes();
packet[0] = 0x05; // Version 5
packet[1] = (Byte)command;
packet[2] = 0; // Reserved
Int32 offset;
if (address.Length == 4)
{
packet[3] = (Byte)SocksAddressType.IPv4;
packet[4] = address[0];
packet[5] = address[0];
packet[6] = address[0];
packet[7] = address[0];
offset = 8;
}
else if (address.Length == 16)
{
packet[3] = (Byte)SocksAddressType.IPv6;
Array.Copy(address, 0, packet, 4, 16);
offset = 20;
}
else
{
throw new InvalidOperationException(String.Format("IPAddress byte length is {0} bytes but only 4 and 16 are supported", address.Length));
}
packet[offset++] = (Byte)(port >> 8);
packet[offset++] = (Byte)(port);
return(offset);
}
public SocksRequest(SocksCommand command, IPAddress destination, ushort port)
{
destination.ThrowIfNull <IPAddress>("destination");
this.Command = command;
this.ATyp = (destination.AddressFamily == AddressFamily.InterNetworkV6) ? S22.Xmpp.Extensions.Socks5.ATyp.IPv6 : S22.Xmpp.Extensions.Socks5.ATyp.IPv4;
this.Destination = destination;
this.Port = port;
}
/// <summary>
/// Initializes a new instance of the SocksRequest class.
/// </summary>
/// <param name="command">The command of the request.</param>
/// <param name="destination">The IP address of the destination host.</param>
/// <param name="port">The port of the destination host.</param>
/// <exception cref="ArgumentNullException">The destination parameter
/// is null.</exception>
public SocksRequest(SocksCommand command, IPAddress destination,
ushort port)
{
Command = command;
ATyp = destination.AddressFamily == AddressFamily.InterNetworkV6 ?
ATyp.IPv6 : ATyp.IPv4;
Destination = destination;
Port = port;
}
public SocksRequest(SocksCommand command, string domain, ushort port)
{
domain.ThrowIfNull <string>("domain");
if (domain.Length > 0xff)
{
throw new ArgumentException("The length of the domain string must not exceed 255 characters.");
}
this.Command = command;
this.ATyp = S22.Xmpp.Extensions.Socks5.ATyp.Domain;
this.Destination = domain;
this.Port = port;
}
/// <summary>
/// Initializes a new instance of the SocksRequest class.
/// </summary>
/// <param name="command">The command of the request.</param>
/// <param name="domain">The fully-qualified domain name of the
/// destination host.</param>
/// <param name="port">The port of the destination host.</param>
/// <exception cref="ArgumentNullException">The domain parameter
/// is null.</exception>
/// <exception cref="ArgumentException">The length of the domain string
/// exceeds 255 characters.</exception>
public SocksRequest(SocksCommand command, string domain, ushort port)
{
if (domain.Length > 255)
{
throw new ArgumentException("The length of the domain string must " +
"not exceed 255 characters.");
}
Command = command;
ATyp = ATyp.Domain;
Destination = domain;
Port = port;
}
public static Int32 MakeRequest(Byte[] packet, SocksCommand command, Byte[] domainName, Int32 port)
{
packet[0] = 0x05; // Version 5
packet[1] = (Byte)command;
packet[2] = 0; // Reserved
packet[3] = (Byte)SocksAddressType.DomainName;
packet[4] = (Byte)domainName.Length;
Int32 offset;
Array.Copy(domainName, 0, packet, 5, domainName.Length);
offset = 5 + domainName.Length;
packet[offset++] = (Byte)(port >> 8);
packet[offset++] = (Byte)(port);
return offset;
}
public static Int32 MakeRequest(Byte[] packet, SocksCommand command, String asciiHostName, Int32 port)
{
packet[0] = 0x05; // Version 5
packet[1] = (Byte)command;
packet[2] = 0; // Reserved
packet[3] = (Byte)SocksAddressType.DomainName;
packet[4] = (Byte)asciiHostName.Length;
Int32 offset = 5;
for (int i = 0; i < asciiHostName.Length; i++)
{
packet[offset++] = (Byte)asciiHostName[i];
}
packet[offset++] = (Byte)(port >> 8);
packet[offset++] = (Byte)(port);
return offset;
}
public static SocksRequest Deserialize(byte[] buffer)
{
SocksRequest request;
using (MemoryStream stream = new MemoryStream(buffer))
{
using (BinaryReader reader = new BinaryReader(stream))
{
if (reader.ReadByte() != 5)
{
throw new SerializationException("Invalid SOCKS5 request.");
}
SocksCommand command = (SocksCommand)reader.ReadByte();
reader.ReadByte();
S22.Xmpp.Extensions.Socks5.ATyp typ = (S22.Xmpp.Extensions.Socks5.ATyp)reader.ReadByte();
IPAddress destination = null;
string domain = null;
switch (typ)
{
case S22.Xmpp.Extensions.Socks5.ATyp.IPv4:
case S22.Xmpp.Extensions.Socks5.ATyp.IPv6:
destination = new IPAddress(reader.ReadBytes((typ == S22.Xmpp.Extensions.Socks5.ATyp.IPv4) ? 4 : 0x10));
break;
case S22.Xmpp.Extensions.Socks5.ATyp.Domain:
{
byte count = reader.ReadByte();
domain = Encoding.ASCII.GetString(reader.ReadBytes(count));
break;
}
}
ushort port = reader.ReadUInt16(true);
if (typ == S22.Xmpp.Extensions.Socks5.ATyp.Domain)
{
return(new SocksRequest(command, domain, port));
}
request = new SocksRequest(command, destination, port);
}
}
return(request);
}
/// <summary>
/// Initializes a new instance of the SocksRequest class.
/// </summary>
/// <param name="command">The command of the request.</param>
/// <param name="domain">The fully-qualified domain name of the
/// destination host.</param>
/// <param name="port">The port of the destination host.</param>
/// <exception cref="ArgumentNullException">The domain parameter
/// is null.</exception>
/// <exception cref="ArgumentException">The length of the domain string
/// exceeds 255 characters.</exception>
public SocksRequest(SocksCommand command, string domain, ushort port) {
domain.ThrowIfNull("domain");
if (domain.Length > 255) {
throw new ArgumentException("The length of the domain string must " +
"not exceed 255 characters.");
}
Command = command;
ATyp = ATyp.Domain;
Destination = domain;
Port = port;
}
/// <summary>
/// Initializes a new instance of the SocksRequest class.
/// </summary>
/// <param name="command">The command of the request.</param>
/// <param name="destination">The IP address of the destination host.</param>
/// <param name="port">The port of the destination host.</param>
/// <exception cref="ArgumentNullException">The destination parameter
/// is null.</exception>
public SocksRequest(SocksCommand command, IPAddress destination,
ushort port) {
destination.ThrowIfNull("destination");
Command = command;
ATyp = destination.AddressFamily == AddressFamily.InterNetworkV6 ?
ATyp.IPv6 : ATyp.IPv4;
Destination = destination;
Port = port;
}
/// <summary>
/// Performs the specified SOCKS5 request.
/// </summary>
/// <param name="command">The command of the SOCKS5 request.</param>
/// <param name="address">The IP address of the remote host.</param>
/// <param name="port">The port of the remote host.</param>
/// <returns>The SOCKS5 reply sent by the server.</returns>
/// <exception cref="ArgumentNullException">The request parameter is
/// null.</exception>
/// <exception cref="ObjectDisposedException">The object has been
/// disposed.</exception>
/// <exception cref="Socks5Exception">The request could not be performed.
/// Consult the InnerException property of the Socks5Exception to learn
/// the reason.</exception>
public SocksReply Request(SocksCommand command, IPAddress address, ushort port)
{
return(Request(new SocksRequest(command, address, port)));
}
public Socks5ConnectionRequest(SocksCommand command, IPAddress destination, int port)
: base(destination, port)
{
Command = command;
}
/// <summary>
/// Performs the specified SOCKS5 request.
/// </summary>
/// <param name="command">The command of the SOCKS5 request.</param>
/// <param name="domain">The domain of the remote host.</param>
/// <param name="port">The port of the remote host.</param>
/// <returns>The SOCKS5 reply sent by the server.</returns>
/// <exception cref="ArgumentNullException">The request parameter is
/// null.</exception>
/// <exception cref="ObjectDisposedException">The object has been
/// disposed.</exception>
/// <exception cref="Socks5Exception">The request could not be performed.
/// Consult the InnerException property of the Socks5Exception to learn
/// the reason.</exception>
public async Task <SocksReply> Request(SocksCommand command, string domain, ushort port)
{
return(await Request(new SocksRequest(command, domain, port)));
}
/// <summary>
/// Performs the specified SOCKS5 request.
/// </summary>
/// <param name="command">The command of the SOCKS5 request.</param>
/// <param name="address">The IP address of the remote host.</param>
/// <param name="port">The port of the remote host.</param>
/// <returns>The SOCKS5 reply sent by the server.</returns>
/// <exception cref="ArgumentNullException">The request parameter is
/// null.</exception>
/// <exception cref="ObjectDisposedException">The object has been
/// disposed.</exception>
/// <exception cref="Socks5Exception">The request could not be performed.
/// Consult the InnerException property of the Socks5Exception to learn
/// the reason.</exception>
public async Task <SocksReply> Request(SocksCommand command, IPAddress address, ushort port)
{
return(await Request(new SocksRequest(command, address, port)));
}
/// <summary>
/// Performs the specified SOCKS5 request.
/// </summary>
/// <param name="command">The command of the SOCKS5 request.</param>
/// <param name="address">The IP address of the remote host.</param>
/// <param name="port">The port of the remote host.</param>
/// <returns>The SOCKS5 reply sent by the server.</returns>
/// <exception cref="ArgumentNullException">The request parameter is
/// null.</exception>
/// <exception cref="ObjectDisposedException">The object has been
/// disposed.</exception>
/// <exception cref="Socks5Exception">The request could not be performed.
/// Consult the InnerException property of the Socks5Exception to learn
/// the reason.</exception>
public SocksReply Request(SocksCommand command, IPAddress address, ushort port)
{
return Request(new SocksRequest(command, address, port));
}
/// <summary>
/// Performs the specified SOCKS5 request.
/// </summary>
/// <param name="command">The command of the SOCKS5 request.</param>
/// <param name="domain">The domain of the remote host.</param>
/// <param name="port">The port of the remote host.</param>
/// <returns>The SOCKS5 reply sent by the server.</returns>
/// <exception cref="ArgumentNullException">The request parameter is
/// null.</exception>
/// <exception cref="ObjectDisposedException">The object has been
/// disposed.</exception>
/// <exception cref="Socks5Exception">The request could not be performed.
/// Consult the InnerException property of the Socks5Exception to learn
/// the reason.</exception>
public SocksReply Request(SocksCommand command, string domain, ushort port)
{
return Request(new SocksRequest(command, domain, port));
}
public Socks5ConnectionRequest(SocksCommand command, string domain, int port = 80)
: base(domain, port)
{
Command = command;
}
/// <summary>
/// Performs the specified SOCKS5 request.
/// </summary>
/// <param name="command">The command of the SOCKS5 request.</param>
/// <param name="domain">The domain of the remote host.</param>
/// <param name="port">The port of the remote host.</param>
/// <returns>The SOCKS5 reply sent by the server.</returns>
/// <exception cref="ArgumentNullException">The request parameter is
/// null.</exception>
/// <exception cref="ObjectDisposedException">The object has been
/// disposed.</exception>
/// <exception cref="Socks5Exception">The request could not be performed.
/// Consult the InnerException property of the Socks5Exception to learn
/// the reason.</exception>
public SocksReply Request(SocksCommand command, string domain, ushort port)
{
return(Request(new SocksRequest(command, domain, port)));
}
public override void DeserializeHeader(IList<byte> serialized)
{
Command = (SocksCommand) serialized[1];
base.DeserializeHeader(serialized);
}
