Hi !
Featured games (88)
games approved by the League of Dukes
Games in Showcase (679)
Games in Android Showcase (194)
games submitted by our members
Games in WIP (732)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  networking  (Read 1619 times)
0 Members and 1 Guest are viewing this topic.
Offline arun

Junior Newbie

« Posted 2006-06-12 14:36:31 »

how can i obtain the IPAddress of all computers in a network
Offline Riven

« JGO Overlord »

Medals: 1215
Projects: 4
Exp: 16 years

Hand over your head.

« Reply #1 - Posted 2006-06-12 14:44:44 »

There is not really a neat way to do this, as far as I know, but I suppose this would work:

InetAddress[] all = new InetAddress[256];
  all[i] = InetAddress.getByName("x.y.z."+i);

// make this heavily multithreaded!!
boolean[] av = ...;
   av[i] = all[i].isReachable(1000);

   System.out.println("Found: "+all[i]);

I hope you can interpret this pseudocode Kiss

Hi, appreciate more people! Σ ♥ = ¾
Learn how to award medals... and work your way up the social rankings!
Offline blahblahblahh

JGO Coder

Medals: 1

« Reply #2 - Posted 2006-06-12 16:26:24 »

You need to write it in native code (not java) - java doesn't give you low-enough level access to the NIC hardware to do this kind of thing efficiently.

However, in 99% of cases you dont want what you asked for, you instead just want to know "which ip addresses are also running a copy of my app?". In which case, just look at the javadocs for the "broadcast" parts of UDP.

NB: the 1% includes people writing viruses, which has long been used as the semi-official excuse for not providing lower-level decenta access. Pisses me off, because you can't write really good, efficient, intelligent P2P cluster code like this. Grumble grumble Smiley.

malloc will be first against the wall when the revolution comes...
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline Jeff

JGO Coder

Got any cats?

« Reply #3 - Posted 2006-06-12 21:38:23 »

What BBB descriebs is sometimes referred to as "Discovery".

I have an example of broadcast based discovery code  in the networking chapter I wrote for Shawn Kendall's java game programming book.

Got a question about Java and game programming?  Just new to the Java Game Development Community?  Try my FAQ.  Its likely you'll learn something!
Pages: [1]
  ignore  |  Print  
You cannot reply to this message, because it is very, very old.

Hydroque (16 views)
2016-05-26 14:45:46

Mac70 (38 views)
2016-05-24 21:16:33

theagentd (42 views)
2016-05-14 18:38:35

theagentd (74 views)
2016-05-10 22:37:41

theagentd (82 views)
2016-05-10 22:33:46

IanParcs (110 views)
2016-04-18 14:18:53

KaiHH (106 views)
2016-04-18 08:35:41

KaiHH (130 views)
2016-04-15 12:43:58

theagentd (133 views)
2016-04-14 02:16:17

theagentd (157 views)
2016-04-14 02:15:43
FPS Camera Tutorial
by Hydroque
2016-05-22 05:40:58

Website offering 3D Models specifically for games for free
by vusman
2016-05-18 17:23:09

Website offering 3D Models specifically for games for free
by vusman
2016-05-09 08:50:56

Website offering 3D Models specifically for games for free
by vusman
2016-05-06 11:10:21

Website offering 3D Models specifically for games for free
by vusman
2016-04-29 12:56:17

List of Learning Resources
by SilverTiger
2016-02-05 09:39:47

List of Learning Resources
by SilverTiger
2016-02-05 09:38:38

List of Learning Resources
by SilverTiger
2016-02-05 09:35:50 is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!