Re: Remote IP for inetd "daemon"

["Marcel Hicking" <hicking@du.gtn.com>]

Thanks a lot!
Does exactly what I need.

Cheers, Marcel


Jeremy C. Reed <reed@wcug.wwu.edu> 18 Sep 2001, at 9:55:

> On Tue, 18 Sep 2001, Marcel Hicking wrote:
>
> > I have a script invoked via inetd.
> > How can I let the script know of the IP of the client
> > connecting (remote IP)? I need to do some additional
> > security checks not possible with hosts.access|deny
> >
> > Any hints?
>
> getpeername(2) is the C library function to get the remote
> IP. This works for me:
>
> #include <sys/types.h>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <arpa/inet.h>
> #include <stdio.h>
>
> int main (int argc, char *argv[])
>
> {
>
>   struct sockaddr_in name;
>   int namelen = sizeof(name);
>   char *temp_domain;
>
>   if (getpeername((int) 1,
>         (struct sockaddr *) & name, (socklen_t *) & namelen)
>         == 0) {
>     if ((temp_domain = (char *) inet_ntoa(name.sin_addr)))
>       printf ("%s", temp_domain);
>   }
> }
>
> Then compile it with "gcc -o getpeername getpeername.c".
> Then use the getpeername executable in your script.
>
>   Jeremy C. Reed
>   http://www.reedmedia.net/
>   http://bsd.reedmedia.net/  -- BSD news and resources
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