LinuxQuestions.org - Blog Entries

Sockets -- A Chat Server with a non-blocking 'select' (i.e., GUI ready)

Posted 01-27-2013 at 06:47 AM by rainbowsally
Updated 01-27-2013 at 06:55 AM by rainbowsally (fix bad edit)

Tags computer mad science, mc2, simple c, sockets

Sockets -- A Chat Server with a non-blocking 'select' (i.e., GUI ready)

[GUI-ready but no GUI in this version. Terminal only.]

Today's feature is

A chat server.
Non blocking 'select' (which we need for importing into an lqMiniTerm).
A web link to more generic sockets code that I wish I had found earlier.
Tarred up example code with makefile for all the code examples at bgnet.

Here's a chat-server you can use to communicate between folks on your computer...

rainbowsally

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Sockets - lqNetDog and lqMiniTerm (req's libLQ)

Posted 01-23-2013 at 04:17 AM by rainbowsally
Updated 01-23-2013 at 04:34 AM by rainbowsally (bum link, note on sizes)

Tags computer mad science, mc2, qt4, sockets

Sockets - lqNetDog and lqMiniTerm (req's libLQ)

Today's feature is:

lqNetDog and lqMiniTerm running sockets in a Qt gui.
C-style functions, Windows style conversion of slots to C funcs.
I/O in one terminal widget (still very simple).

Here's a screenshot.
http://rainbowsally.net/pub/lq/image...ui-800x600.png

Here's a self extractor for the files.

file: ans-orig-gui.sfxz
purpose: utility (executable)

Code:

...

rainbowsally

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Sockets - The lqNetDog mini-lib for socket connections

Posted 01-22-2013 at 06:40 AM by rainbowsally
Updated 01-22-2013 at 10:52 AM by rainbowsally (moved some includes)

Tags computer mad science, mc2, simple c, sockets

[Bad logic level in netdog_request() presumably fixed. -rs]

Sockets - The NetDog mini-lib for socket connections

Today's feature is:

NetDog. :-)
A simple non-blocking ans (listen) and orig (connect) example.
Minor bundling of socket functions to greatly simplify a successful connection.

Complicating this stuff is easy. Simplifying it is the hard part.

The non-blocking setup here simplifies coding for a gui which needs to constantly be...

rainbowsally

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Sockets - Bidirectional Communication IPv4/6 (terminal version)

Posted 01-17-2013 at 08:54 PM by rainbowsally

Tags computer mad science, mc2, simple c, sockets

Sockets - Bidirectional Communication IPv4/6 (terminal version)

Today's features:

More fun with sockets.
Bidirectional communication using IPv4 and IPv6 socket streams (sequential).
Interactive. (Only interprets one command, but it's easily expandable.)
Terminal version for broader usefulness.

[Note the addresses in this and the previous sockets experiments (here http://www.linuxquestions.org/questi...example-35270/)...

rainbowsally

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Sockets - UDP RX (recieve/transmit) terminal example

Posted 01-17-2013 at 06:15 PM by rainbowsally
Updated 01-17-2013 at 06:16 PM by rainbowsally

Tags computer mad science, mc2, simple c, sockets

Sockets - UDP RX (recieve/transmit) terminal example
Today's feature:

A UDP file server and client using linux sockets.
A terminal app for those who don't have libLQ-qt and mc2.

[This is for our LQ-less friends. A libLQ version using a qt gui but NOT qt sockets should be forthcoming shortly.]

This upload is pushing the size limit but it's interesting to see how the broadcast channel is set up (in inc/broadcast-rx.c) and how the parts of the files are picked up...

rainbowsally

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