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How to handke mutiple Winsock Clients messages?

Posted on 2008-10-11
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Last Modified: 2013-11-23
Hi Experts,
My Delphi 6 application need to listen to a TCP port and respond to multi clients messages accordingly.

This is the protocol of the communication.

Connection Request from client , 16 bytes
A B C L 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

I need to respond with 16 bytes
A B C R  0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

Then Client will Send 16 + Commad No of Bytes which will be in 8 to 11
A B C L  0x00 0x00 0x00 0x00 8 9 10 11 0x00 0x00 0x00 0x00 ...

I need to respond this with same No of bytes
A B C R  0x00 0x00 0x00 0x00 8 9 10 11 0x00 0x00 0x00 0x00 ...

Finally  Disconnection from Client.
A B C L 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

I'm VERY new to winsock and TCP comunication. It would be very helpful if it is a detailed working sample.

When I use a Network Snipper WireShark the data for Connection looks is like this
41 42 43 4c 00 00 00 00 00 00 00 00 00 00 00 00

Thanks
PCSC
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Question by:pcssecure
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Accepted Solution

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mikelittlewood earned 500 total points
ID: 22694206
Take a look at the indy components and demos at http://www.indyproject.org/index.en.aspx
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by:pcssecure
ID: 22695904
I'm seeing something wrong in the format. So re-posting again.
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