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From: j@bonnie.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Idea for Talk to PPP host
Date: 17 Jul 1995 11:59:52 +0200
Organization: Private U**x site, Dresden.
Lines: 55
Message-ID: <3udcao$62@bonnie.tcd-dresden.de>
References: <3te4fb$mt@news.simplex.nl> <3ttt96$8dm@hydra.msgi.com> <3tvub5$nol@bonnie.tcd-dresden.de> <3u3cro$ija@hydra.msgi.com>
Reply-To: joerg_wunsch@uriah.heep.sax.de
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Coranth Gryphon <gryphon@msgi.com> wrote:
>In article <3tvub5$nol@bonnie.tcd-dresden.de>,
>J Wunsch <joerg_wunsch@uriah.heep.sax.de> wrote:
>>Coranth Gryphon <gryphon@msgi.com> wrote:
>>
>>>Do you have both IP addresses registed as the same host name ?
>>
>>Same hostname, but the 192.168 address is not officially registered
>>(apparently -- it's a `private' network address).
>
>Can you give two seperate host names for the different addresses?
Not easily.
>I know this configuration works.
How?
get_names(argc, argv)
int argc;
char *argv[];
{
...
gethostname(hostname, sizeof (hostname));
my_machine_name = hostname;
get_addrs(my_machine_name, his_machine_name);
...
}
get_addrs(my_machine_name, his_machine_name)
char *my_machine_name, *his_machine_name;
{
...
hp = gethostbyname(my_machine_name);
...
bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length);
}
So it's looking up `my_machine_name' by gethostname(), returning what-
ever i've entered as the primary host name. Later, it uses this name
for a gethostbyname() call, and obtains `my_machine_addr' out of the
returned ``primary'' address for the machine. It should however
extract the appropriate local address (wrt. to the route to the remote
side) out of the following field:
char **h_addr_list; /* list of addresses from name server */
--
cheers, J"org private: joerg_wunsch@uriah.heep.sax.de
http://www.sax.de/~joerg/
Never trust an operating system you don't have sources for. ;-)