10.8 Summary
We have looked at a simple SCTP client and
server spanning about 150 lines of code. Both the client and server
used the one-to-many-style SCTP interface. The server was
constructed in an iterative style, common when using the
one-to-many-style interface, receiving each message and responding
on either the same stream the message was sent on or on one stream
higher. We then looked at the head-of-line blocking problem. We
modified our client to emphasize the problem and to show how SCTP
streams can be used to avoid this problem. We looked at how the
number of streams can be manipulated using one of the many socket
options available to control SCTP behavior. Finally, we again
modified our server and client so that they could be made to either
abort an association including a user upper layer reason code, or
in our server's case, shut down the association gracefully after
sending a message.
We will examine SCTP more deeply in Chapter 23
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