private static string createCommandString(string host, int port, ProxyInfos proxyInfos)
{
string connectCmd;
if (!string.IsNullOrEmpty(proxyInfos.UserName))
{
// gets the user/pass into base64 encoded string in the form of [username]:[password]
string auth = Convert.ToBase64String(Encoding.ASCII.GetBytes(string.Format("{0}:{1}", proxyInfos.UserName, proxyInfos.Password)));
// PROXY SERVER REQUEST
// =======================================================================
//CONNECT starksoft.com:443 HTTP/1.0<CR><LF>
//HOST starksoft.com:443<CR><LF>
//Proxy-Authorization: username:password<CR><LF>
// NOTE: username:password string will be base64 encoded as one
// concatenated string
//[... other HTTP header lines ending with <CR><LF> if required]>
//<CR><LF> // Last Empty Line
connectCmd = String.Format(CultureInfo.InvariantCulture, "CONNECT {0}:{1} HTTP/1.1\r\nUser-Agent: rabbitmq-net-client/3.5.3\r\nHost: {0}:{1}\r\nProxy-Authorization: Basic {2}\r\n\r\n", host, port.ToString(CultureInfo.InvariantCulture), auth);
}
else
{
// PROXY SERVER REQUEST
// =======================================================================
//CONNECT starksoft.com:443 HTTP/1.0 <CR><LF>
//HOST starksoft.com:443<CR><LF>
//[... other HTTP header lines ending with <CR><LF> if required]>
//<CR><LF> // Last Empty Line
connectCmd = String.Format(CultureInfo.InvariantCulture, "CONNECT {0}:{1} HTTP/1.1\r\nUser-Agent: rabbitmq-net-client/3.5.3\r\nHost: {0}:{1}\r\n\r\n", host, port.ToString(CultureInfo.InvariantCulture));
}
return(connectCmd);
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="proxyHost">Host name or IP address of the proxy server.</param>
/// <param name="proxyPort">Port number to connect to the proxy server.</param>
/// <param name="proxyUsername">Username for the proxy server.</param>
/// <param name="proxyPassword">Password for the proxy server.</param>
public TunneledTcpClient(AddressFamily addressFamily, string proxyHost, int proxyPort, string proxyUsername = null, string proxyPassword = null) :
base(null)
{
if (!String.IsNullOrEmpty(proxyHost) && (proxyPort <= 0 || proxyPort > 65535))
throw new ArgumentOutOfRangeException("proxyPort", "port must be greater than zero and less than 65535");
_proxyInformation = new ProxyInfos(proxyHost, proxyPort, proxyUsername, proxyPassword);
_addressFamily = addressFamily;
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="proxyHost">Host name or IP address of the proxy server.</param>
/// <param name="proxyPort">Port number to connect to the proxy server.</param>
/// <param name="proxyUsername">Username for the proxy server.</param>
/// <param name="proxyPassword">Password for the proxy server.</param>
public TunneledTcpClient(AddressFamily addressFamily, string proxyHost, int proxyPort, string proxyUsername = null, string proxyPassword = null) :
base(null)
{
if (!String.IsNullOrEmpty(proxyHost) && (proxyPort <= 0 || proxyPort > 65535))
{
throw new ArgumentOutOfRangeException("proxyPort", "port must be greater than zero and less than 65535");
}
_proxyInformation = new ProxyInfos(proxyHost, proxyPort, proxyUsername, proxyPassword);
_addressFamily = addressFamily;
}
private static void sendConnectionCommand(TcpClient tcpClient, ProxyInfos infos, string host, int port)
{
//log.DebugFormat("Start sending connection command");
NetworkStream stream = tcpClient.GetStream();
string connectCmd = createCommandString(host, port, infos);
//log.DebugFormat("Connect command: {0}", connectCmd);
byte[] request = ASCIIEncoding.ASCII.GetBytes(connectCmd);
// send the connect request
stream.Write(request, 0, request.Length);
// wait for the proxy server to respond
waitForData(tcpClient, stream);
//log.DebugFormat("Reponse for connection command available!");
// PROXY SERVER RESPONSE
// =======================================================================
//HTTP/1.0 200 Connection Established<CR><LF>
//[.... other HTTP header lines ending with <CR><LF>..
//ignore all of them]
//<CR><LF> // Last Empty Line
// create an byte response array
byte[] response = new byte[tcpClient.ReceiveBufferSize];
StringBuilder sbuilder = new StringBuilder();
int bytes = 0;
long total = 0;
do
{
bytes = stream.Read(response, 0, tcpClient.ReceiveBufferSize);
total += bytes;
sbuilder.Append(System.Text.ASCIIEncoding.UTF8.GetString(response, 0, bytes));
} while (stream.DataAvailable);
var resp = parseResponse(sbuilder.ToString());
//log.DebugFormat("Response: {0} - {1}", resp.Code, resp.Message);
// evaluate the reply code for an error condition
if (resp.Code != HttpResponseCodes.OK)
{
handleProxyCommandError(host, port, tcpClient, resp);
}
//log.DebugFormat("Connection to destination established: {0}", tcpClient.Client.RemoteEndPoint);
}
/// <summary>
/// Creates a remote TCP connection through a proxy server to the destination host on the destination port.
/// </summary>
/// <param name="destinationHost">Destination host name or IP address.</param>
/// <param name="destinationPort">Port number to connect to on the destination host.</param>
/// <param name="addressFamily">AdressFamliy for tcp client. Currently ignored.</param>
/// <param name="proxyInfos">Dto for all container infos</param>
/// <returns>
/// Returns an open TcpClient object that can be used normally to communicate
/// with the destination server
/// </returns>
/// <remarks>
/// This method creates a connection to the proxy server and instructs the proxy server
/// to make a pass through connection to the specified destination host on the specified
/// port.
/// </remarks>
private static TcpClient createConnection(string destinationHost, int destinationPort, AddressFamily addressFamily, ProxyInfos proxyInfos)
{
var tcpClient = new TcpClient()
{
NoDelay = true
};
try
{
//if (String.IsNullOrEmpty(proxyInfos.Host))
// throw new ProxyException("ProxyHost property must contain a value.");
if (proxyInfos != null && proxyInfos.Uri != null && !String.IsNullOrEmpty(proxyInfos.Uri.DnsSafeHost))
{
if (proxyInfos.Uri.Port <= 0 || proxyInfos.Uri.Port > 65535)
{
throw new ProxyException("ProxyPort value must be greater than zero and less than 65535");
}
// attempt to open the connection
tcpClient.Connect(proxyInfos.Uri.DnsSafeHost, proxyInfos.Uri.Port);
//log.DebugFormat("Connection to proxy established: {0}", tcpClient.Client.RemoteEndPoint);
// send connection command to proxy host for the specified destination host and port
sendConnectionCommand(tcpClient, proxyInfos, destinationHost, destinationPort);
}
else // no proxy in use
{
//log.DebugFormat("No proxy available. Connect directly to destination host.");
// attempt to open the connection
tcpClient.Connect(destinationHost, destinationPort);
//log.DebugFormat("Connection to destination established: {0}", tcpClient.Client.RemoteEndPoint);
}
return(tcpClient);
}
catch (SocketException ex)
{
throw new ProxyException(String.Format(CultureInfo.InvariantCulture, "Connection to proxy host {0} on port {1} failed.", Utils.GetHost(tcpClient) ?? destinationHost, Utils.GetPort(tcpClient) ?? destinationPort.ToString(), ex));
}
}
private static string createCommandString(string host, int port, ProxyInfos proxyInfos)
{
string connectCmd;
if (!string.IsNullOrEmpty(proxyInfos.UserName))
{
// gets the user/pass into base64 encoded string in the form of [username]:[password]
string auth = Convert.ToBase64String(Encoding.ASCII.GetBytes(string.Format("{0}:{1}", proxyInfos.UserName, proxyInfos.Password)));
// PROXY SERVER REQUEST
// =======================================================================
//CONNECT starksoft.com:443 HTTP/1.0<CR><LF>
//HOST starksoft.com:443<CR><LF>
//Proxy-Authorization: username:password<CR><LF>
// NOTE: username:password string will be base64 encoded as one
// concatenated string
//[... other HTTP header lines ending with <CR><LF> if required]>
//<CR><LF> // Last Empty Line
connectCmd = String.Format(CultureInfo.InvariantCulture, "CONNECT {0}:{1} HTTP/1.1\r\nUser-Agent: rabbitmq-net-client/3.5.3\r\nHost: {0}:{1}\r\nProxy-Authorization: Basic {2}\r\n\r\n", host, port.ToString(CultureInfo.InvariantCulture), auth);
}
else
{
// PROXY SERVER REQUEST
// =======================================================================
//CONNECT starksoft.com:443 HTTP/1.0 <CR><LF>
//HOST starksoft.com:443<CR><LF>
//[... other HTTP header lines ending with <CR><LF> if required]>
//<CR><LF> // Last Empty Line
connectCmd = String.Format(CultureInfo.InvariantCulture, "CONNECT {0}:{1} HTTP/1.1\r\nUser-Agent: rabbitmq-net-client/3.5.3\r\nHost: {0}:{1}\r\n\r\n", host, port.ToString(CultureInfo.InvariantCulture));
}
return connectCmd;
}
private static void sendConnectionCommand(TcpClient tcpClient, ProxyInfos infos, string host, int port)
{
//log.DebugFormat("Start sending connection command");
NetworkStream stream = tcpClient.GetStream();
string connectCmd = createCommandString(host, port, infos);
//log.DebugFormat("Connect command: {0}", connectCmd);
byte[] request = ASCIIEncoding.ASCII.GetBytes(connectCmd);
// send the connect request
stream.Write(request, 0, request.Length);
// wait for the proxy server to respond
waitForData(tcpClient, stream);
//log.DebugFormat("Reponse for connection command available!");
// PROXY SERVER RESPONSE
// =======================================================================
//HTTP/1.0 200 Connection Established<CR><LF>
//[.... other HTTP header lines ending with <CR><LF>..
//ignore all of them]
//<CR><LF> // Last Empty Line
// create an byte response array
byte[] response = new byte[tcpClient.ReceiveBufferSize];
StringBuilder sbuilder = new StringBuilder();
int bytes = 0;
long total = 0;
do
{
bytes = stream.Read(response, 0, tcpClient.ReceiveBufferSize);
total += bytes;
sbuilder.Append(System.Text.ASCIIEncoding.UTF8.GetString(response, 0, bytes));
} while (stream.DataAvailable);
var resp = parseResponse(sbuilder.ToString());
//log.DebugFormat("Response: {0} - {1}", resp.Code, resp.Message);
// evaluate the reply code for an error condition
if (resp.Code != HttpResponseCodes.OK)
handleProxyCommandError(host, port, tcpClient, resp);
//log.DebugFormat("Connection to destination established: {0}", tcpClient.Client.RemoteEndPoint);
}
/// <summary>
/// Creates a remote TCP connection through a proxy server to the destination host on the destination port.
/// </summary>
/// <param name="destinationHost">Destination host name or IP address.</param>
/// <param name="destinationPort">Port number to connect to on the destination host.</param>
/// <param name="addressFamily">AdressFamliy for tcp client. Currently ignored.</param>
/// <param name="proxyInfos">Dto for all container infos</param>
/// <returns>
/// Returns an open TcpClient object that can be used normally to communicate
/// with the destination server
/// </returns>
/// <remarks>
/// This method creates a connection to the proxy server and instructs the proxy server
/// to make a pass through connection to the specified destination host on the specified
/// port.
/// </remarks>
private static TcpClient createConnection(string destinationHost, int destinationPort, AddressFamily addressFamily, ProxyInfos proxyInfos)
{
var tcpClient = new TcpClient()
{
NoDelay = true
};
try
{
//if (String.IsNullOrEmpty(proxyInfos.Host))
// throw new ProxyException("ProxyHost property must contain a value.");
if (proxyInfos != null && proxyInfos.Uri!=null && !String.IsNullOrEmpty(proxyInfos.Uri.DnsSafeHost))
{
if (proxyInfos.Uri.Port <= 0 || proxyInfos.Uri.Port > 65535)
throw new ProxyException("ProxyPort value must be greater than zero and less than 65535");
// attempt to open the connection
tcpClient.Connect(proxyInfos.Uri.DnsSafeHost, proxyInfos.Uri.Port);
//log.DebugFormat("Connection to proxy established: {0}", tcpClient.Client.RemoteEndPoint);
// send connection command to proxy host for the specified destination host and port
sendConnectionCommand(tcpClient, proxyInfos, destinationHost, destinationPort);
}
else // no proxy in use
{
//log.DebugFormat("No proxy available. Connect directly to destination host.");
// attempt to open the connection
tcpClient.Connect(destinationHost, destinationPort);
//log.DebugFormat("Connection to destination established: {0}", tcpClient.Client.RemoteEndPoint);
}
return tcpClient;
}
catch (SocketException ex)
{
throw new ProxyException(String.Format(CultureInfo.InvariantCulture, "Connection to proxy host {0} on port {1} failed.", Utils.GetHost(tcpClient) ?? destinationHost, Utils.GetPort(tcpClient) ?? destinationPort.ToString(), ex));
}
}
