> It's easy with LineMode on - ICS only forwards the data on when it > receives a delimeter. But when it's off, it seems as though anything > other than file sends and receives (because you don't really act on the > file stream, you just send or recieve its bytes) proves to be a > difficult task.
If not using a delimiter, you must use a byte count. In any case, the receiver need to know how much data has been sent by the sender. TCP doesn't preserve boundaries: it send all data in the correct order, without error and only once. But it can split or merge data according to what is needed by the network layer. Most protocols use line mode (SMTP, POP3, NNTP, ...) some use both : FTP and HTTP. FTP use two TCP connections: one for commands and one for data. On command stream, it use line mode. On data stream, it just send data. End of data is found because the stream is simply closed. HTTP use a single TCP stream, begin with line mode in his header and then switch to byte count for the document. Byte count is given in one of the header lines. So what do you have to do ? You have to design your own protocol, using line mode or not, it is not very important. What is important is that at any moment one side know what the other is trying to do. I understood that you don't want to use line mode. Perfect for me. Use a byte count. You can, for example build each of your message with 4 byte being a 32 bit integer that gives the number of data bytes that follow. Send is trivial. Receiving require a buffer where you append everything you receive. Each time you received something (OnDataAvailable event, then call Receive method), you check how many bytes you have received. If less than 4, you just do nothing more. If more than 4, then you received your count. You compare the count with the actual data received. If you have enough data, you trigger your own event, such as OnMessageReceived, passing the count of bytes and the pointer to the first byte into your buffer (You can also copy the data but if will be slower). When the event handler returns, you remove the count and the message data from the buffer, keeping the rest for the next round. -- [EMAIL PROTECTED] http://www.overbyte.be -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
