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Creating a listener

Posted on 2009-07-07
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Last Modified: 2012-05-07
Hi,

in my application I need to write a custom listener. Could you please help me to start? I've never wrote something like that. Are there any classes in C++ which I could reuse, do you know some other relevant resources? Thank you in advance!
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Question by:StraySod
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by:Let_Me_Be
ID: 24795646
What kind of listener?
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Expert Comment

by:itsmeandnobodyelse
ID: 24796297
Do you mean a listener for clients in socket programming?
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mrjoltcola earned 250 total points
ID: 24796369
In standard C++ there are no "standard" listener classes. You will be using sockets either way. You can get an API that has implemented TCP client / server classes.

IP*Works makes it easy
http://www.nsoftware.com

Also Chilkat
http://www.chilkatsoft.com/

Since you did not specificy a platform, I cannot tell much more except on Windows you will be using winsock capability in your project.
On UNIX you use "Berkeley sockets" API.

Start here: http://en.wikipedia.org/wiki/Berkeley_sockets

Also look online for UNIX Network Programming by W. RIchard Stevens, it is the classic standby and still the best. Even if not using UNIX, it covers the sockets API in extreme detail and most samples will compile on Windows.

Essentially, for a server, you do the following:

socket()
bind()
listen()
while(true) {
   accept()   // new connection
   service connection
   close()
}


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Assisted Solution

by:evilrix
evilrix earned 250 total points
ID: 24796724
Are you trying to implement an observer pattern?
http://en.wikipedia.org/wiki/Observer_pattern

If so try this tutorial: "Implementing the Observer Pattern in C++ - Part 1"
http://accu.org/index.php/journals/372
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Author Closing Comment

by:StraySod
ID: 31600608
Thank you. Your comment was helpful
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Expert Comment

by:evilrix
ID: 24797236
I'm slightly confused as the two selected answer are, mostly, unrelated.
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Author Comment

by:StraySod
ID: 24805174
It's because I'm only doing a research, not implementing yet and both answers helped me to understand some concepts. I'm sure it's fair to split points the way I did it in this case :) Thank you again
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