Solved

How does ICQ know a connection was made?

Posted on 1998-11-30
11
222 Views
Last Modified: 2010-04-01
I can see that the ICQ program has an agent that "knows"
when a network connection was made (through dial-up,LAN etc.).
How do they do that (from their source code)?
Thanks.
0
Comment
Question by:gilbert_chang
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 2
  • 2
  • +2
11 Comments
 
LVL 6

Expert Comment

by:thresher_shark
ID: 1178894
I don't know how THEY do it.  I suspect they just continually try to ping a server (like mirabilis.com) until it is successful.  Then ICQ connects.  If you want source code for pinging a server, I think I can provide it.
0
 

Author Comment

by:gilbert_chang
ID: 1178895
I would appreciate it.
Thanks.
0
 
LVL 5

Expert Comment

by:yonat
ID: 1178896
No, they use the RAS API. Take a look at RasConnectionNotification API function.
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 6

Expert Comment

by:thresher_shark
ID: 1178897
It looks like yonat's solution is better, but in case you want a ping sample, go here:

http://www.codeguru.com/network/ping.shtml
0
 

Expert Comment

by:darklight
ID: 1178898
What about for MFC ?
0
 
LVL 5

Expert Comment

by:yonat
ID: 1178899
What about it? This is a simple API function, not something you need a class wrapper for.
0
 
LVL 5

Accepted Solution

by:
yonat earned 50 total points
ID: 1178900
The API function RasConnectionNotification() will allow you to be notified when a connection is made.
0
 

Author Comment

by:gilbert_chang
ID: 1178901
RasConnectionNotification() only lets me know when a new RAS connection is made. What about other connections (Not dial-up),
Such as LAN connections?
Thanks.
0
 
LVL 5

Expert Comment

by:yonat
ID: 1178902
You'll need to write a WinSock "Layered Service Provider" for that. This is much more complicated. If you really want to do that, see http://www.sockets.com/winsock2.htm .
0
 
LVL 5

Expert Comment

by:yonat
ID: 1178903
BTW, ICQ does use RasConnectionNotification() (I know some people from Mirabilis...)
0
 
LVL 13

Expert Comment

by:Mirkwood
ID: 1178904
Bought This Question.
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Templates For Beginners Or How To Encourage The Compiler To Work For You Introduction This tutorial is targeted at the reader who is, perhaps, familiar with the basics of C++ but would prefer a little slower introduction to the more ad…
What is C++ STL?: STL stands for Standard Template Library and is a part of standard C++ libraries. It contains many useful data structures (containers) and algorithms, which can spare you a lot of the time. Today we will look at the STL Vector. …
The goal of the video will be to teach the user the difference and consequence of passing data by value vs passing data by reference in C++. An example of passing data by value as well as an example of passing data by reference will be be given. Bot…
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.

691 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question