how to find mac address of a remote computer?

[Jay]

I need to write a program to find mac address of a remote computer, is
this possible? How?

[Mark A. Odell]

ja*****@hotmail.com (Jay) wrote in
news:6d**************************@posting.google.c om:

I need to write a program to find mac address of a remote computer, is
this possible? How?

You cannot do this without platform-specific code which is off-topic here.
The C language does not provide networking support.

--
- Mark ->
--

[David Rubin]

Jay wrote:

I need to write a program to find mac address of a remote computer, is
this possible? How?

arp?

/david

--
Andre, a simple peasant, had only one thing on his mind as he crept
along the East wall: 'Andre, creep... Andre, creep... Andre, creep.'
-- unknown

[Jirka Klaue]

Jay wrote:

I need to write a program to find mac address of a remote computer, is
this possible? How?

It is possible, but you don't need to write a program, since
there is http://www.tcpdump.org.

Jirka

[Jan Engelhardt]

>I need to write a program to find mac address of a remote computer, is

this possible? How?

Ping between both computers and run "arp" on one side if you got Linux or
similar.

[Dan Pop]

In <Pi*******************************@yvahk01.tjqt.qr > Jan Engelhardt <je*****@linux01.gwdg.de> writes:

I need to write a program to find mac address of a remote computer, is
this possible? How?

Ping between both computers and run "arp" on one side if you got Linux or
similar.

And you'll get the MAC address of the router, if the machines are not on
the same subnet.

Dan
--
Dan Pop
DESY Zeuthen, RZ group
Email: Da*****@ifh.de

[Lew Pitcher]

Jay wrote:

I need to write a program to find mac address of a remote computer, is
this possible? How?

#include <stdio.h>

int main(void)
{
char mac_address[257];

printf("Enter the MAC address of the remote computer: ");
fflush(stdin);

fgets(mac_address,sizeof(mac_address), stdin);
if (mac_address[strlen(mac_address) - 1] == '\n')
mac_address[strlen(mac_address) - 1] = 0;

printf("The MAC address of the remote computer is %s\n",
mac_address);

return 0;
}

--
Lew Pitcher

Master Codewright and JOAT-in-training
Registered Linux User #112576 (http://counter.li.org/)
Slackware - Because I know what I'm doing.

[Joona I Palaste]

Lew Pitcher <lp******@sympatico.ca> scribbled the following:

Jay wrote:

I need to write a program to find mac address of a remote computer, is
this possible? How?

#include <stdio.h> int main(void)
{
char mac_address[257]; printf("Enter the MAC address of the remote computer: ");
fflush(stdin); ^^^^^^^^^^^^^
Undefined behaviour. Because of this, the program might completely
fail to display the given MAC address.
fgets(mac_address,sizeof(mac_address), stdin);
if (mac_address[strlen(mac_address) - 1] == '\n')
mac_address[strlen(mac_address) - 1] = 0; printf("The MAC address of the remote computer is %s\n",
mac_address); return 0;
}

--
/-- Joona Palaste (pa*****@cc.helsinki.fi) ---------------------------\
| Kingpriest of "The Flying Lemon Tree" G++ FR FW+ M- #108 D+ ADA N+++|
| http://www.helsinki.fi/~palaste W++ B OP+ |
\----------------------------------------- Finland rules! ------------/
"Insanity is to be shared."
- Tailgunner

[Lew Pitcher]

Joona I Palaste wrote:

Lew Pitcher <lp******@sympatico.ca> scribbled the following:

Jay wrote:

I need to write a program to find mac address of a remote computer, is
this possible? How?

printf("Enter the MAC address of the remote computer: ");
fflush(stdin);

^^^^^^^^^^^^^
Undefined behaviour. Because of this, the program might completely
fail to display the given MAC address.

Da*n, caught out by a typo. Of course, I meant
fflush(stdout);
but I transcribed it incorrectly.
--

Lew Pitcher, IT Consultant, Application Architecture
Enterprise Technology Solutions, TD Bank Financial Group

(Opinions expressed here are my own, not my employer's)

[PeterW]

Originally posted by Jay

I need to write a program to find mac address of a remote computer, is this possible? How?
If you can run a remote shell on the machine, you can run ifconfig and
parse the result with grep from the standard output.
rsh remoteHost sbin/ifconfig | grep "^eth0"

eth0 Link encap:Ethernet HWaddr 00:0D:29:A8:80:44

You can use cut or awk to extract the MAC hardware address.
--
PeterW
Posted via http://dbforums.com

[Joona I Palaste]

PeterW <me*********@dbforums.com> scribbled the following:

Originally posted by Jay

I need to write a program to find mac address of a remote computer, is
this possible? How?

If you can run a remote shell on the machine, you can run ifconfig and
parse the result with grep from the standard output. rsh remoteHost sbin/ifconfig | grep "^eth0"

eth0 Link encap:Ethernet HWaddr 00:0D:29:A8:80:44

You can use cut or awk to extract the MAC hardware address.

Which part of this had anything at all to do with C?

--
/-- Joona Palaste (pa*****@cc.helsinki.fi) ------------- Finland --------\
\-- http://www.helsinki.fi/~palaste --------------------- rules! --------/
"That's no raisin - it's an ALIEN!"
- Tourist in MTV's Oddities

[Glen Herrmannsfeldt]

"Joona I Palaste" <pa*****@cc.helsinki.fi> wrote in message
news:bn**********@oravannahka.helsinki.fi...

PeterW <me*********@dbforums.com> scribbled the following:

Originally posted by Jay

I need to write a program to find mac address of a remote computer, is
this possible? How?

If you can run a remote shell on the machine, you can run ifconfig and
parse the result with grep from the standard output.

rsh remoteHost sbin/ifconfig | grep "^eth0"

eth0 Link encap:Ethernet HWaddr 00:0D:29:A8:80:44

You can use cut or awk to extract the MAC hardware address.

Which part of this had anything at all to do with C?

ifconfig, grep, cut, and awk are all C programs.

-- glen

[Joona I Palaste]

Glen Herrmannsfeldt <ga*@ugcs.caltech.edu> scribbled the following:

"Joona I Palaste" <pa*****@cc.helsinki.fi> wrote in message
news:bn**********@oravannahka.helsinki.fi...

PeterW <me*********@dbforums.com> scribbled the following:

> Originally posted by Jay
>> I need to write a program to find mac address of a remote computer, is
>> this possible? How?

> If you can run a remote shell on the machine, you can run ifconfig and
> parse the result with grep from the standard output.

>> rsh remoteHost sbin/ifconfig | grep "^eth0"
> eth0 Link encap:Ethernet HWaddr 00:0D:29:A8:80:44

> You can use cut or awk to extract the MAC hardware address.

Which part of this had anything at all to do with C?

ifconfig, grep, cut, and awk are all C programs.

But this newsgroup is about C, not C programs.

--
/-- Joona Palaste (pa*****@cc.helsinki.fi) ------------- Finland --------\
\-- http://www.helsinki.fi/~palaste --------------------- rules! --------/
"Immanuel Kant but Genghis Khan."
- The Official Graffitist's Handbook

[Mark McIntyre]

On Mon, 27 Oct 2003 19:52:05 GMT, in comp.lang.c , "Glen
Herrmannsfeldt" <ga*@ugcs.caltech.edu> wrote:

"Joona I Palaste" <pa*****@cc.helsinki.fi> wrote in message

Which part of this had anything at all to do with C?

ifconfig, grep, cut, and awk are all C programs.

Says who? Maybe they're written in Fortran on the OP's platform.

--
Mark McIntyre
CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
CLC readme: <http://www.angelfire.com/ms3/bchambless0/welcome_to_clc.html>
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