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

[Chris Dollin]

sunny wrote:

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.

There's no such function in standard C. For portability I'd guess something
POSIXy, so asking in comp.unix.progr ammer might help (even if you're
/not/ on a Unix box).

--
Chris "electric hedgehog" Dollin
"No-one here is exactly what he appears." G'kar, /Babylon 5/

[Kenny McCormack]

In article <er**********@m urdoch.hpl.hp.c om>,
Chris Dollin <ch**********@h p.comwrote:

>sunny wrote:

>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.

There's no such function in standard C. For portability I'd guess something
POSIXy, so asking in comp.unix.progr ammer might help (even if you're
/not/ on a Unix box).

IOW:

Off topic. Not portable. Cant discuss it here. Blah, blah, blah.

Useful clc-related links:

http://en.wikipedia.org/wiki/Aspergers
http://en.wikipedia.org/wiki/Clique
http://en.wikipedia.org/wiki/C_programming_language

[Richard Tobin]

In article <er**********@m urdoch.hpl.hp.c om>,
Chris Dollin <ch**********@h p.comwrote:

>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.

>There's no such function in standard C.

And since a computer can easily have several IP addresses (or none),
you might want to consider what exactly you want.

-- Richard
--
"Considerat ion shall be given to the need for as many as 32 characters
in some alphabets" - X3.4, 1963.

[sunny]

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

[Richard Tobin]

In article <11************ **********@h3g2 000cwc.googlegr oups.com>,
sunny <ka************ ***@gmail.comwr ote:

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

But why? What should the program do if the machine hasn't got an IP
address, or has several?

And as you've been told, there's no way to do it in standard C; you'll
need to ask in a group that deals with your particular operating
system. There may be a function that returns all the IP addresses
associated with your machine, or perhaps something that tells you the
name (or one of the names) of your machine, and a function that lets
you look up the IP address(es) assocument with that name.

-- Richard
--
"Considerat ion shall be given to the need for as many as 32 characters
in some alphabets" - X3.4, 1963.

[santosh]

sunny wrote:

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

Please quote the post you're replying to.

The standrad C language has no facility to do what you want. You'll
probably have to call a POSIX function like gethostname() or
gethostid(). Please look it up in your system's documentation or take
this question to whatever group that is more specific to your
platform. For example, if you're on a UNIX, post to
comp.unix.progr ammer.

[Christopher Layne]

Richard Tobin wrote:

In article <er**********@m urdoch.hpl.hp.c om>,
Chris Dollin <ch**********@h p.comwrote:

>>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.

>>There's no such function in standard C.

And since a computer can easily have several IP addresses (or none),
you might want to consider what exactly you want.

-- Richard

And amusingly on top of that, the procedure used to discover the assigned IPs
to each interface on a host is neither POSIX compliant nor standard. About
the most "portable" way is using ioctl's which are system specific and hoping
that the system you're on supports the more "standard" ioctl's.

It pretty much sucks but is documented in UNPv1 (Stevens).

[Kenny McCormack]

In article <er***********@ pc-news.cogsci.ed. ac.uk>,
Richard Tobin <ri*****@cogsci .ed.ac.ukwrote:

>In article <11************ **********@h3g2 000cwc.googlegr oups.com>,
sunny <ka************ ***@gmail.comwr ote:

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

But why? What should the program do if the machine hasn't got an IP
address, or has several?

And as you've been told, there's no way to do it in standard C; you'll
need to ask in a group that deals with your particular operating
system. There may be a function that returns all the IP addresses
associated with your machine, or perhaps something that tells you the
name (or one of the names) of your machine, and a function that lets
you look up the IP address(es) assocument with that name.

IOW:

Off topic. Not portable. Cant discuss it here. Blah, blah, blah.

Useful clc-related links:

http://en.wikipedia.org/wiki/Aspergers
http://en.wikipedia.org/wiki/Clique
http://en.wikipedia.org/wiki/C_programming_language

[Kenneth Brody]

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.

There are "standard" function calls, outside the scope of standard C,
which you can use. Perhaps something like gethostid()? However, to
get more details, you need to ask elsewhere. Perhaps this is topical
in comp.unix.progr ammer?

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

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