November 1999
Intermediate to advanced
832 pages
19h 28m
English
Content preview from Practical Programming in Tcl & Tk, Third Edition
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Chapter 17. Socket Programming
This chapter shows how to use sockets for programming network clients and servers. Advanced I/O techniques for sockets are described, including nonblocking I/O and control over I/O buffering. Tcl commands discussed are: socket, fconfigure, and http::geturl.
Sockets are network communication channels. The sockets described in this chapter use the TCP network protocol, although you can find Tcl extensions that create sockets using other protocols. TCP provides a reliable byte stream between two hosts connected to a network. TCP handles all the issues about routing information across the network, and it automatically recovers if data is lost or corrupted along the way. TCP is the basis for other protocols like Telnet, ...
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