Socket Programming Under T/TCP

Programming for T/TCP is slightly different using socket programming.

As an example, the chain of system calls to implement a TCP client would be as follows:

• socket() - create a socket
• connect() - connect to the remote host
• write() - write data to the remote host
• shutdown() - close one side of the connection

Whereas with T/TCP the chain of commands would be:

• socket() - create a socket
• sendto() - connect, send data, and close connection

The sendto() function has to be able to use a new flag MSG_EOF, to indicate to the kernel that it has no more data to send on this connection. This is the transaction processing coming into effect.

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