/// <summary>
/// Synchronously reads a packet from a Rendezvous proxy connection
/// </summary>
private RendezvousProxyPacket ReadProxyPacket()
{
int bytesreceived = 0;
byte[] header = new byte[12];
while (bytesreceived < header.Length)
{
bytesreceived += socket.Read(header, bytesreceived, header.Length - bytesreceived);
}
Logging.DumpFLAP(header, "Rendezvous proxy read packet header");
RendezvousProxyPacket retval = new RendezvousProxyPacket();
using (ByteStream bstream = new ByteStream(header))
{
retval.Data = new byte[bstream.ReadUshort() - 10];
bstream.AdvanceToPosition(4);
retval.Command = (RendezvousProxyCommand)bstream.ReadUshort();
}
bytesreceived = 0;
while (bytesreceived < retval.Data.Length)
{
bytesreceived +=
socket.Read(retval.Data, bytesreceived, retval.Data.Length - bytesreceived);
}
Logging.DumpFLAP(retval.Data, "Rendezvous proxy read packet data");
return(retval);
}
/// <summary>
/// Synchronously reads a packet from a Rendezvous proxy connection
/// </summary>
RendezvousProxyPacket ReadProxyPacket(RendezvousData rd)
{
Socket sock = rd.DirectConnection.Transfer;
int bytesreceived = 0;
byte[] header = new byte[12];
while (bytesreceived < header.Length)
{
bytesreceived += sock.Receive(header, bytesreceived, header.Length - bytesreceived, SocketFlags.None);
}
Logging.DumpFLAP(header, "Rendezvous proxy read packet header");
int index = 4;
RendezvousProxyPacket retval = new RendezvousProxyPacket();
retval.Command = (RendezvousProxyCommand)Marshal.ByteArrayToUshort(header, ref index);
index = 0;
retval.Data = new byte[Marshal.ByteArrayToUshort(header, ref index) - 10];
bytesreceived = 0;
while (bytesreceived < retval.Data.Length)
{
bytesreceived += sock.Receive(retval.Data, bytesreceived, retval.Data.Length - bytesreceived, SocketFlags.None);
}
Logging.DumpFLAP(retval.Data, "Rendezvous proxy read packet data");
return(retval);
}
private void SendThroughStage2AolProxyConnectFinished()
{
try
{
ProxyInitializeReceive();
RendezvousProxyPacket rpp = ReadProxyPacket();
if (rpp.Command == RendezvousProxyCommand.Ready)
{
OnDirectConnectReady();
}
}
catch (Exception)
{
OnDirectConnectFailed("Proxy refused connection");
}
}
/// <summary>
/// Sends a Rendezvous INITRECV and begins sending the file through the proxy connection
/// </summary>
internal void StartSendThroughStage2Proxy(RendezvousData rd)
{
try
{
ProxyInitializeReceive(rd);
RendezvousProxyPacket rpp = ReadProxyPacket(rd);
if (rpp.Command == RendezvousProxyCommand.Ready)
{
BeginSendFile(rd);
}
}
catch (Exception)
{
rd.DirectConnection.CancelTransfer("Proxy refused connection");
}
}
/// <summary>
/// Completes the final connection to the proxy server
/// </summary>
private void InitAolProxyReceiveConnectFinished()
{
try
{
ProxyInitializeReceive();
RendezvousProxyPacket rpp = ReadProxyPacket();
if (rpp.Command == RendezvousProxyCommand.Error)
{
throw new Exception("Proxy server refused connection");
}
OnDirectConnectReady();
}
catch (Exception ex)
{
OnDirectConnectFailed(ex.Message);
}
}
/// <summary>
/// Completes the initial connection to the AOL proxy server
/// </summary>
/// <remarks>This method is used to complete the proxy server transaction for both
/// Stage 1 sending and Stage 2 receiver-redirect proxy scenarios</remarks>
private void InitAolProxyConnectFinished()
{
try
{
ProxyInitializeSend();
RendezvousProxyPacket rpp = ReadProxyPacket();
if (rpp.Command == RendezvousProxyCommand.Acknowledge)
{
using (ByteStream bstream = new ByteStream(rpp.Data))
{
Port = bstream.ReadUshort();
aolProxyIP = (new IPAddress(bstream.ReadByteArray(4))).ToString();
}
// Send the "send file" request on SNAC(04,06):02
parent.Messages.RequestDirectConnectionInvite(this);
// Wait for the proxy to send its 12 byte READY sequence
lock (socket)
{
socket.BeginRead(new byte[12], 0, 12, new AsyncCallback(ProxyReceivedReady), null);
//socket.BeginReceive(new byte[12], 0, 12, SocketFlags.None, new AsyncCallback(ProxyReceivedReady), null);
}
}
else
{
ushort error = (ushort)((rpp.Data[0] << 8) | rpp.Data[1]);
if (error == 0x0004)
{
throw new Exception("Recipient not logged in");
}
else if (error == 0x000D)
{
throw new Exception("Client sent bad request");
}
throw new Exception("AOL proxy sent unknown error");
}
}
catch (Exception ex)
{
if (DirectConnectionFailed != null)
{
DirectConnectionFailed(ex.Message);
}
}
}
/// <summary>
/// Completes the initial connection to the proxy server
/// </summary>
/// <remarks>This method is used to complete the proxy server transaction for both
/// Stage 1 sending and Stage 2 receiver-redirect proxy scenarios</remarks>
private void InitProxyConnectFinished(IAsyncResult res)
{
RendezvousData rd = res.AsyncState as RendezvousData;
DirectConnectInfo fti = rd.DirectConnection;
try
{
fti.Transfer.EndConnect(res);
ProxyInitializeSend(rd);
RendezvousProxyPacket rpp = ReadProxyPacket(rd);
if (rpp.Command == RendezvousProxyCommand.Acknowledge)
{
rd.Port = Marshal.ByteArrayToUshort(rpp.Data, 0);
byte[] ipaddr = new byte[4];
Marshal.CopyArray(rpp.Data, ipaddr, 2);
rd.ProxyIP = (new IPAddress(ipaddr)).ToString();
// Send the "send file" request on SNAC(04,06):02
// SNAC04.SendDirectConnectionRequest(_parent, rd);
// Wait for the proxy to send its 12 byte READY sequence
rd.DirectConnection.Transfer.BeginReceive(new byte[12], 0, 12,
SocketFlags.None, new AsyncCallback(ProxyReceivedReady), rd);
}
else
{
int index = 0;
ushort error = Marshal.ByteArrayToUshort(rpp.Data, ref index);
if (error == 0x0004)
{
throw new Exception("Recipient not logged in");
}
else if (error == 0x000D)
{
throw new Exception("Client sent bad request");
}
throw new Exception("AOL proxy sent unknown error");
}
}
catch (Exception ex)
{
fti.CancelTransfer(ex.Message);
}
}
/// <summary>
/// Completes the final connection to the proxy server
/// </summary>
private void InitProxyReceiveConnectFinished(IAsyncResult res)
{
RendezvousData rd = res.AsyncState as RendezvousData;
try
{
rd.DirectConnection.Transfer.EndConnect(res);
ProxyInitializeReceive(rd);
RendezvousProxyPacket rpp = ReadProxyPacket(rd);
if (rpp.Command == RendezvousProxyCommand.Error)
{
throw new Exception("Proxy server refused connection");
}
BeginReceiveFile(rd);
}
catch (Exception ex)
{
rd.DirectConnection.CancelTransfer(ex.Message);
}
}
/// <summary>
/// Synchronously reads a packet from a Rendezvous proxy connection
/// </summary>
RendezvousProxyPacket ReadProxyPacket(RendezvousData rd)
{
Socket sock = rd.DirectConnection.Transfer;
int bytesreceived = 0;
byte[] header = new byte[12];
while (bytesreceived < header.Length)
{
bytesreceived += sock.Receive(header, bytesreceived, header.Length - bytesreceived, SocketFlags.None);
}
Logging.DumpFLAP(header, "Rendezvous proxy read packet header");
int index = 4;
RendezvousProxyPacket retval = new RendezvousProxyPacket();
retval.Command = (RendezvousProxyCommand)Marshal.ByteArrayToUshort(header, ref index);
index = 0;
retval.Data = new byte[Marshal.ByteArrayToUshort(header, ref index) - 10];
bytesreceived = 0;
while (bytesreceived < retval.Data.Length)
{
bytesreceived += sock.Receive(retval.Data, bytesreceived, retval.Data.Length - bytesreceived, SocketFlags.None);
}
Logging.DumpFLAP(retval.Data, "Rendezvous proxy read packet data");
return retval;
}
/// <summary>
/// Synchronously reads a packet from a Rendezvous proxy connection
/// </summary>
private RendezvousProxyPacket ReadProxyPacket()
{
int bytesreceived = 0;
byte[] header = new byte[12];
while (bytesreceived < header.Length)
{
bytesreceived += socket.Read(header, bytesreceived, header.Length - bytesreceived);
}
Logging.DumpFLAP(header, "Rendezvous proxy read packet header");
RendezvousProxyPacket retval = new RendezvousProxyPacket();
using (ByteStream bstream = new ByteStream(header))
{
retval.Data = new byte[bstream.ReadUshort() - 10];
bstream.AdvanceToPosition(4);
retval.Command = (RendezvousProxyCommand)bstream.ReadUshort();
}
bytesreceived = 0;
while (bytesreceived < retval.Data.Length)
{
bytesreceived +=
socket.Read(retval.Data, bytesreceived, retval.Data.Length - bytesreceived);
}
Logging.DumpFLAP(retval.Data, "Rendezvous proxy read packet data");
return retval;
}
