Date: Thu, 22 May 2008 20:24:11 +0200 From: Bernd Walter <ticso@cicely7.cicely.de> To: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> Cc: freebsd-hackers@freebsd.org, John Timony <fabonacci@yahoo.com> Subject: Re: How can I translate IP to hostname in C Message-ID: <20080522182410.GB55002@cicely7.cicely.de> In-Reply-To: <20080522161214.Y47338@maildrop.int.zabbadoz.net> References: <839372.78392.qm@web46311.mail.sp1.yahoo.com> <20080522161214.Y47338@maildrop.int.zabbadoz.net>
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On Thu, May 22, 2008 at 04:14:46PM +0000, Bjoern A. Zeeb wrote: > On Thu, 22 May 2008, John Timony wrote: > > Hi, > > >I am writing a c program in FreeBSD,and I can not > >translate a ip to hostname > >,i wonder if there is a function to take this job... > > You mean like gethostbyaddr()? > > See also http://www.unixguide.net/network/socketfaq/2.24.shtml for > further inspiration on this but slightly different topic. You can also use the newer getaddrinfo(3)/freeaddrinfo(3). I think it is bit easier to use and can it transparently handle inet6 addresses as well. The only downside is that some rare old systems don't support it. On FreeBSD it is suppoorted since FreeBSD-4, but some commerical OS implemented it later. -- B.Walter <bernd@bwct.de> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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