Network Computers

[Santy]

Hello Friends,

I am making an application in which i need to list all the computers in
my network.

can anyone suggest any code to accomplish this task.

Thanks
Santosh

[santosh]

Santy wrote:

Hello Friends,

I am making an application in which i need to list all the computers in
my network.

can anyone suggest any code to accomplish this task.

Thanks
Santosh

This will depend on the API provided by the underlying OS. This group
deals mainly with ISO C, which has no notion of networks. Ask in a
group which deals with programming under your OS. Generally, there're
fairly portable POSIX APIs to do this, unless you happen to code for
Billy Gates.

[Kenneth Brody]

Santy wrote:

>
Hello Friends,

I am making an application in which i need to list all the computers in
my network.

can anyone suggest any code to accomplish this task.

This can't be done in standard C. Your networking software may have
some platform-specific calls that you can use. However, to find out
about that, you'll need to check somewhere else -- either the manual
that came with the network or C compiler, or a newsgroup that talks
about your platform.

--
+-------------------------+--------------------+-----------------------+
| Kenneth J. Brody | www.hvcomputer.com | #include |
| kenbrody/at\spamcop.net | www.fptech.com | <std_disclaimer.h|
+-------------------------+--------------------+-----------------------+
Don't e-mail me at: <mailto:Th*************@gmail.com>

[Walter Roberson]

In article <11********************@b28g2000cwb.googlegroups.c om>,
santosh <sa*********@gmail.comwrote:

>Santy wrote:

>I am making an application in which i need to list all the computers in
my network.

>This will depend on the API provided by the underlying OS. This group
deals mainly with ISO C, which has no notion of networks. Ask in a
group which deals with programming under your OS.

Correct so far.

>Generally, there're
fairly portable POSIX APIs to do this, unless you happen to code for
Billy Gates.

Unfortunately that part is not correct. There are no POSIX APIs
to enumerate all the computers in any network -- not even if one
confines oneself to a particular subnet. No matter what API you
use on computer X, computer Y might be programmed to ignore all
packets from computer X.

--
If you lie to the compiler, it will get its revenge. -- Henry Spencer

[Mark McIntyre]

On Wed, 11 Oct 2006 16:47:45 +0000 (UTC), in comp.lang.c ,
ro******@ibd.nrc-cnrc.gc.ca (Walter Roberson) wrote:

>In article <11********************@b28g2000cwb.googlegroups.c om>,
santosh <sa*********@gmail.comwrote:

>>Santy wrote:

>>I am making an application in which i need to list all the computers in
my network.

>>Generally, there're
fairly portable POSIX APIs to do this, unless you happen to code for
Billy Gates.

Unfortunately that part is not correct. There are no POSIX APIs
to enumerate all the computers in any network -- not even if one
confines oneself to a particular subnet. No matter what API you
use on computer X, computer Y might be programmed to ignore all
packets from computer X.

The Billy Gates part is also incorrect. Unless you're running an
antique version of Windows from the early nineties (in which case, you
ought to mention Stevie J too) it'll respond to much the same
protocols as any other networked device.

--
Mark McIntyre

"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it."
--Brian Kernighan

[Gordon Burditt]

>>Unfortunately that part is not correct. There are no POSIX APIs

>>to enumerate all the computers in any network -- not even if one
confines oneself to a particular subnet. No matter what API you
use on computer X, computer Y might be programmed to ignore all
packets from computer X.

The Billy Gates part is also incorrect. Unless you're running an
antique version of Windows from the early nineties (in which case, you
ought to mention Stevie J too) it'll respond to much the same
protocols as any other networked device.

Are you claiming that no recent version of Windows has a working
firewall that can block all packets from a particular IP or netblock?
("recent" includes at least Windows XP) Even if that's true, I can
still put a Cisco router in between that computer and the outside
world to implement that block.

[Santy]

Santy wrote:

Hello Friends,

I am making an application in which i need to list all the computers in
my network.

can anyone suggest any code to accomplish this task.

Thanks
Santosh

for coding The application i am using the Gcc C compiler on Linux
Platform.

[Ancient_Hacker]

Santy wrote:

Hello Friends,

I am making an application in which i need to list all the computers in
my network.

can anyone suggest any code to accomplish this task.

Thanks
Santosh

sure: system( "nmap -Sp >/tmp/MyOut.Txt" )

That's a joke of sorts.

There is nothing in C itself to have anything to do with networks.

But with the system() function you can run an external program.
Luckily there's a free program called "nmap" that can do a pretty
awesome job of peeking at a network. Use google to find where to
download nmap source or binary and go to it!

[CBFalconer]

Santy wrote:

Santy wrote:

>>
I am making an application in which i need to list all the
computers in my network.

can anyone suggest any code to accomplish this task.

for coding The application i am using the Gcc C compiler on Linux
Platform.

This is off-topic for c.l.c. The C language knows zip about
networks. Find a newsgroup with the word 'linux' in its name.

--
Some informative links:
<news:news.announce.newusers
<http://www.geocities.com/nnqweb/>
<http://www.catb.org/~esr/faqs/smart-questions.html>
<http://www.caliburn.nl/topposting.html>
<http://www.netmeister.org/news/learn2quote.html>
<http://cfaj.freeshell.org/google/>