public static int onConnected(IntPtr handle, ref FSP_SocketParameter context)
{
Console.WriteLine("Connected, handle = {0:X}", handle);
if (handle == (IntPtr)0)
{
Console.WriteLine("Connection failed.");
return(-1);
}
if (context.len <= 0)
{
goto l_nokey;
}
// well, how to marshal a complicate, mixed string and byte array?
byte[] original = new byte[1024];
Marshal.Copy(context.welcome, original, 0, context.len);
// we knew there must be a welcome message.
int mLen = Array.IndexOf <byte>(original, 0);
if (mLen++ <= 0)
{
goto l_nokey;
}
// Now mLen is the number of bytes occupied by the message, including the termination '\0'
Console.WriteLine("--- Welcome message from remote peer --- ");
Console.WriteLine(">>>");
Console.WriteLine(Encoding.UTF8.GetString(original, 0, mLen));
//TODO! .GetEncoding("GBK")? ASCII!?
Console.WriteLine("<<<");
if (mLen >= context.len)
{
goto l_nokey;
}
Array.Copy(original, mLen, bufPeersKey, 0, FSPAPI.CRYPTO_NACL_KEYBYTES);
FSPAPI.InstallAuthenticKey(handle, bufSharedKey, FSPAPI.CRYPTO_NACL_KEYBYTES, Int32.MaxValue, FlagEndOfMessage.NOT_END_ANYWAY);
FSPAPI.FSPControl(handle
, FSP_ControlCode.FSP_SET_CALLBACK_ON_ERROR
, Marshal.GetFunctionPointerForDelegate(new NotifyOrReturn(onError2)));
FSPAPI.WriteTo(handle, bufPublicKey, FSPAPI.CRYPTO_NACL_KEYBYTES
, FlagEndOfMessage.END_OF_MESSAGE
, new NotifyOrReturn(onPublicKeySent));
return(0);
l_nokey:
Console.Write("To read the filename directly...\t");
if (FSPAPI.ReadFrom(handle, fileName, fileName.Length, new NotifyOrReturn(onReceiveFileNameReturn)) < 0)
{
finished = true;
return(-1); // to dispose/reject the connection
}
return(0);
}
public static int onReceiveNextBlock(IntPtr handle
, [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 2)] Byte[] buf, int len, bool toBeContinued)
{
if (len < 0)
{
Console.WriteLine("FSP Internal panic? Callback on peeked return {0}", len);
FSPAPI.Dispose(handle);
finished = true;
return(-1);
}
if (len > 0)
{
Console.Write("{0} bytes read, to write the buffer directly...", len);
try
{
hFile.Write(buf, 0, len);
Console.WriteLine("done.");
}
catch (Exception e)
{
Console.WriteLine("Error on writing file: {0}", e.Message);
FSPAPI.Dispose(handle);
finished = true;
return(-1);
}
}
else
{
Console.WriteLine("Receive nothing when calling the CallbackPeeked.");
}
if (!toBeContinued)
{
Console.WriteLine("All data have been received, to acknowledge...\n");
hFile.Close();
// Respond with a code saying no error
int r = FSPAPI.WriteTo(handle, Encoding.ASCII.GetBytes("0000"), 4, FlagEndOfMessage.END_OF_MESSAGE, new NotifyOrReturn(onAcknowledgeSent));
if (r < 0)
{
FSPAPI.Dispose(handle);
finished = true;
return(-1);
}
}
// return a non-zero would let the occupied receive buffer free
return(1);
}