| public Receive ( byte buffer ) : int | ||
| buffer | byte | The storage location for the received data. |
| return | int | |
/// <summary>
/// Reads data from the stream.
/// </summary>
/// <param name="buffer">The location in memory to store data read from the stream.</param>
/// <param name="offset">The location in the buffer to begin storing the data to.</param>
/// <param name="size">The number of bytes to read from the stream.</param>
/// <returns>The number of bytes read from the stream.</returns>
/// <exception cref="ArgumentNullException"><paramref name="buffer"/> is a null reference (<b>Nothing</b> in Visual Basic).</exception>
/// <exception cref="ArgumentOutOfRangeException">The specified <paramref name="offset"/> or <paramref name="size"/> exceeds the size of <paramref name="buffer"/>.</exception>
/// <exception cref="IOException">There is a failure while reading from the network.</exception>
public override int Read(byte[] buffer, int offset, int size)
{
if (buffer == null)
{
throw new ArgumentNullException();
}
if (offset < 0 || offset > buffer.Length || size < 0 || size > buffer.Length - offset)
{
throw new ArgumentOutOfRangeException();
}
if (Socket == null)
{
throw new IOException();
}
return(Socket.Receive(buffer, offset, size, SocketFlags.None));
}
public static string[] GetHttp11Headers(SecureSocket socket)
{
var headers = new List<string>(5);
var lineBuffer = new byte[1024];
string header = String.Empty;
int totalBytesCame = 0;
int bytesOfLastHeader = 0;
while (true)
{
bool gotException = false;
var bf = new byte[1];
int bytesCame = socket.Receive(bf);
if (bytesCame == 0)
break;
Buffer.BlockCopy(bf, 0, lineBuffer, totalBytesCame, bytesCame);
totalBytesCame += bytesCame;
try
{
header = Encoding.UTF8.GetString(lineBuffer, bytesOfLastHeader, totalBytesCame - bytesOfLastHeader);
}
catch
{
gotException = true;
}
if (totalBytesCame != 0 && !gotException && header[header.Length - 1] == '\n')
{
headers.Add(header.TrimEnd('\n', '\r'));
bytesOfLastHeader = totalBytesCame;
}
// empty header means we got \r\n\r\n which was trimmed. This means end of headers block.
if (headers.Count >= 2 && String.IsNullOrEmpty(headers.LastOrDefault()))
{
break;
}
}
headers.RemoveAll(String.IsNullOrEmpty);
return headers.ToArray();
}
//sendraw SSL
public string sendraw (string ipRaw, string portRaw, string payloadRaw, int size, int TimeOut, int retry, bool useSSL) {
IPHostEntry IPHost = Dns.Resolve(ipRaw);
string []aliases = IPHost.Aliases;
IPAddress[] addr = IPHost.AddressList;
IPEndPoint iep ;
SecureProtocol sp;
sp=SecureProtocol.Ssl3;
SecureSocket s=null;
SecurityOptions options = new SecurityOptions(sp);
options.Certificate = null;
options.Protocol=SecureProtocol.Ssl3;
options.Entity = ConnectionEnd.Client;
options.CommonName = ipRaw;
options.VerificationType = CredentialVerification.None;
options.Flags = SecurityFlags.IgnoreMaxProtocol;
options.AllowedAlgorithms = SslAlgorithms.ALL;
while (retry>0){
try {
s = new SecureSocket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp, options);
s.SetSocketOption (SocketOptionLevel.Socket, SocketOptionName.SendTimeout, 4000);
s.SetSocketOption (SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 4000);
iep = new IPEndPoint(addr[0],Convert.ToInt32(portRaw));
s.Connect(iep);
ASCIIEncoding asen= new ASCIIEncoding();
byte[] ba=asen.GetBytes(payloadRaw);
s.Send(ba,ba.Length,System.Net.Sockets.SocketFlags.None);
byte[] bb=new byte[size];
int k=1;
string response="";
while (k>0){
k=s.Receive(bb,size,System.Net.Sockets.SocketFlags.None);
response+=Encoding.Default.GetString(bb,0,k);
}
s.Close();
GC.Collect();
GC.WaitForPendingFinalizers();
return response;
}
catch(Exception ex) {
retry--;
Thread.Sleep(1000);
}
}
return "Timeout or retry count exceeded";
}
public static void Http11DownloadResource(SecureSocket socket, Uri requestUri)
{
byte[] headersBytes = Encoding.UTF8.GetBytes(ConstructHeaders(requestUri));
int sent = socket.Send(headersBytes);
string[] responseHeaders = ReadHeaders(socket);
var buffer = new byte[128 * 1024]; //128 kb
using (var stream = new MemoryStream(128 * 1024))
{
while (true)
{
int received = socket.Receive(buffer, 0, buffer.Length, SocketFlags.None);
if (received == 0)
break;
stream.Write(buffer, 0, received);
}
var fileBuffer = new byte[stream.Position];
Buffer.BlockCopy(stream.GetBuffer(), 0, fileBuffer, 0, fileBuffer.Length);
int fileNameIndex = requestUri.AbsolutePath.LastIndexOf("/");
string fileName = requestUri.AbsolutePath.Substring(fileNameIndex);
string directory = AssemblyPath;
SaveFile(directory, fileName, fileBuffer);
if (OnDownloadSuccessful != null)
{
OnDownloadSuccessful(null, new Http11ResourceDownloadedEventArgs(fileBuffer.Length, fileName));
}
socket.Close();
if (OnSocketClosed != null)
{
OnSocketClosed(null, new SocketCloseEventArgs());
}
}
}
private bool GetSessionHeaderAndVerifyIt(SecureSocket incomingClient)
{
var sessionHeaderBuffer = new byte[ClientSessionHeader.Length];
int received = incomingClient.Receive(sessionHeaderBuffer, 0,
sessionHeaderBuffer.Length, SocketFlags.None);
var receivedHeader = Encoding.UTF8.GetString(sessionHeaderBuffer);
if (receivedHeader != ClientSessionHeader)
{
return false;
}
return true;
}
public string sendraw(string ipRaw, string portRaw, string payloadRaw, int size, int TimeOut, bool useSSL)
{
int retry = (int)updownRetryTCP.Value;
IPHostEntry IPHost = Dns.GetHostEntry(ipRaw);
//IPHostEntry IPHost = Dns.Resolve(ipRaw);
string[] aliases = IPHost.Aliases;
IPAddress[] addr = IPHost.AddressList;
IPEndPoint iep;
SecureProtocol sp;
sp = SecureProtocol.Ssl3;
SecureSocket s = null;
SecurityOptions options = new SecurityOptions(sp);
options.Certificate = null;
options.Protocol = SecureProtocol.Ssl3;
options.Entity = ConnectionEnd.Client;
options.CommonName = ipRaw;
options.VerificationType = CredentialVerification.None;
options.Flags = SecurityFlags.IgnoreMaxProtocol;
options.AllowedAlgorithms = SslAlgorithms.ALL;
while (retry > 0)
{
try
{
s = new SecureSocket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp, options);
s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, 4000);
s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 4000);
iep = new IPEndPoint(addr[0], Convert.ToInt32(portRaw));
s.Connect(iep);
ASCIIEncoding asen = new ASCIIEncoding();
byte[] ba = asen.GetBytes(payloadRaw);
s.Send(ba, ba.Length, System.Net.Sockets.SocketFlags.None);
byte[] bb = new byte[size];
string response = "";
int k = 1;
while (k > 0)
{
k = s.Receive(bb, size, System.Net.Sockets.SocketFlags.None);
for (int i = 0; i < k; i++)
{
response += Convert.ToChar(bb[i]);
}
}
s.Close();
GC.Collect();
GC.WaitForPendingFinalizers();
return response;
}
catch
{
retry--;
lblStatus.Text = "Network problem - retrying\r\n";
lblNiktoAI.Text = "Network problem - retrying\r\n";
Thread.Sleep(1000);
}
}
return "Retry count (" + updownRetryTCP.Value.ToString() + ") exceeded";
}
private bool GetSessionHeaderAndVerifyIt(SecureSocket incomingClient)
{
var sessionHeaderBuffer = new byte[ClientSessionHeader.Length];
int received = incomingClient.Receive(sessionHeaderBuffer, 0,
sessionHeaderBuffer.Length, SocketFlags.None);
var receivedHeader = Encoding.UTF8.GetString(sessionHeaderBuffer);
return string.Equals(receivedHeader, ClientSessionHeader, StringComparison.OrdinalIgnoreCase);
}
/// <summary>
/// Download a file using the synchronous Socket methods.
/// </summary>
/// <param name="url">The URL to download.
/// </param>
/// <param name="sp">The protocol to use.</param>
protected void DownloadFile(Url url, SecureProtocol sp)
{
string request = GetHttpRequest(url); // holds the HTTP request for the given URL
SecureSocket s;
try {
// First we create a new SecurityOptions instance
// SecurityOptions objects hold information about the security
// protocols the SecureSocket should use and how the SecureSocket
// should react in certain situations.
SecurityOptions options = new SecurityOptions(sp);
// The Certificate field holds a certificate associated with
// a client [you, for instance]. Because client certificates
// are not often used for HTTP over SSL or TLS, we'll simply
// set this field to a null reference.
options.Certificate = null;
// The Entity specifies whether the SecureSocket should act
// as a client socket or as a server socket. In this case,
// it should act as a client socket.
options.Entity = ConnectionEnd.Client;
// The CommonName field specifies the name of the remote
// party we're connecting to. This is usually the domain name
// of the remote host.
options.CommonName = url.Host;
// The VerificationType field specifies how we intend to verify
// the certificate. In this case, we tell the SecureSocket that
// we will manually verify the certificate. Look in the documentation
// for other options.
options.VerificationType = CredentialVerification.Manual;
// When specifying the CredentialVerification.Manual option, we
// must also specify a CertVerifyEventHandler delegate that will
// be called when the SecureSocket receives the remote certificate.
// The Verifier field holds this delegate. If no manual verification
// is done, this field can be set to a null reference.
options.Verifier = new CertVerifyEventHandler(OnVerify);
// The Flags field specifies which flags should be used for the
// connection. In this case, we will simply use the default behavior.
options.Flags = SecurityFlags.Default;
// Allow only secure ciphers to be used. If the server only supports
// weak encryption, the connections will be shut down.
options.AllowedAlgorithms = SslAlgorithms.SECURE_CIPHERS;
// create a new SecureSocket instance and initialize it with
// the security options we specified above.
s = new SecureSocket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp, options);
// connect to the remote host
s.Connect(new IPEndPoint(Dns.GetHostEntry(url.Host).AddressList[0], url.Port));
} catch (Exception e) {
Console.WriteLine("Exception occurred while connecting: " + e.ToString());
return;
}
// send the HTTP request to the remote host
Console.Write("HTTP Query string:\r\n------------------\r\n" + request);
try {
byte[] reqBytes = Encoding.ASCII.GetBytes(request);
int sent = s.Send(reqBytes, 0, reqBytes.Length, SocketFlags.None);
while(sent != reqBytes.Length) {
sent += s.Send(reqBytes, sent, reqBytes.Length - sent, SocketFlags.None);
}
} catch (Exception e) {
Console.WriteLine("Exception occurred while sending: " + e.ToString());
return;
}
// receive the reply
Console.WriteLine("HTTP Server reply:\r\n------------------");
try {
byte[] buffer = new byte[4096];
int ret = s.Receive(buffer);
while(ret != 0) {
Console.Write(Encoding.ASCII.GetString(buffer, 0, ret));
ret = s.Receive(buffer);
}
} catch (Exception e) {
Console.WriteLine("Exception occurred while receiving: " + e.ToString());
return;
}
try {
s.Shutdown(SocketShutdown.Both); // shut down the TCP connection
} catch (Exception e) {
Console.WriteLine("Exception occurred while shutting the connection down: " + e.ToString());
return;
}
s.Close();
}
