How to get the IP address of my machine through a 'C' program

[sunny]

Hai,
Anybody can give me idea how to get the ip address of my machine
through a cprogram with out using the socket programming. Is there any
system call to get the ip address of my machine that will be used in
the c program to display the IP address of my machine.
Regards,
Sunny

[Clever Monkey]

Kenneth Brody wrote:

sunny wrote:

>i need to write a c program to get the ip of my own machine without
using the sockets in it.

You can't do this in standard C. The closest you can do is:

char *GetMyIP()
{
return "127.0.0.1" ;
}

However, I doubt this is sufficient for what you need/want.

I'll add to the library:

char *GetMyIPv6() {
return "Not implemented";
}

Sorry. Couldn't resist.

[Kenny McCormack]

In article <45************ ***@spamcop.net >,
Kenneth Brody <ke******@spamc op.netwrote:
....

>Of course, as has been pointed out, what happens if the machine has
more than one IP address? What if it has none?

More to the point, "machines" don't have IP addresses. NICs do.
And, in many (most?) cases, the IP assigned to a given NIC isn't
the IP address that you care about anyway (because of NAT).

[Walter Roberson]

In article <er**********@n ews.xmission.co m>,
Kenny McCormack <ga*****@xmissi on.xmission.com wrote:

>More to the point, "machines" don't have IP addresses. NICs do.

NICs only need to read and write packets; everything else is up to
the IP stack or is an optimization with the cooperation of the IP
stack.
--
If you lie to the compiler, it will get its revenge. -- Henry Spencer

[Kenneth Brody]

Clever Monkey wrote:

>
Kenneth Brody wrote:

sunny wrote:

i need to write a c program to get the ip of my own machine without
using the sockets in it.

You can't do this in standard C. The closest you can do is:

char *GetMyIP()
{
return "127.0.0.1" ;
}

However, I doubt this is sufficient for what you need/want.

I'll add to the library:

char *GetMyIPv6() {
return "Not implemented";
}

Sorry. Couldn't resist.

Shouldn't that be "return NULL;" to indicate an error? :-)

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Don't e-mail me at: <mailto:Th***** ********@gmail. com>

[Gordon Burditt]

>Anybody can give me idea how to get the ip address of my machine

>through a cprogram with out using the socket programming. Is there any
system call to get the ip address of my machine that will be used in
the c program to display the IP address of my machine.

*THE* IP address? Isn't that a little like telling someone to press
*THE* key on *THE* keyboard?

Assuming it's got networking and TCP/IP, "127.0.0.1" is a surprisingly
portable answer to this question.

[Randy Howard]

On Fri, 16 Feb 2007 05:16:18 -0600, sunny wrote
(in article <11************ **********@h3g2 000cwc.googlegr oups.com>):

i need to write a c program to get the ip of my own machine without
using the sockets in it.

As others have indicated, and you have snipped away the context, this
is tricky to do, and outside the scope of this particular newsgroup.
You should ask in a newsgroup appropriate to your platform, and keep in
mind that doing this correctly can be tricky, especially with systems
with more than one network adapter.

--
Randy Howard (2reply remove FOOBAR)
"The power of accurate observation is called cynicism by those
who have not got it." - George Bernard Shaw