From owner-freebsd-hackers@FreeBSD.ORG  Thu Mar  9 16:25:46 2006
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 56B9716A420
	for <freebsd-hackers@freebsd.org>; Thu,  9 Mar 2006 16:25:46 +0000 (GMT)
	(envelope-from freebsd-hackers@m.gmane.org)
Received: from ciao.gmane.org (main.gmane.org [80.91.229.2])
	by mx1.FreeBSD.org (Postfix) with ESMTP id E102143D49
	for <freebsd-hackers@freebsd.org>; Thu,  9 Mar 2006 16:25:45 +0000 (GMT)
	(envelope-from freebsd-hackers@m.gmane.org)
Received: from list by ciao.gmane.org with local (Exim 4.43)
	id 1FHNvx-0006Zw-Nl
	for freebsd-hackers@freebsd.org; Thu, 09 Mar 2006 17:24:13 +0100
Received: from gw205.f5.com ([205.229.151.151])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-hackers@freebsd.org>; Thu, 09 Mar 2006 17:24:13 +0100
Received: from atkin901 by gw205.f5.com with local (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-hackers@freebsd.org>; Thu, 09 Mar 2006 17:24:13 +0100
X-Injected-Via-Gmane: http://gmane.org/
To: freebsd-hackers@freebsd.org
From: othermark <atkin901@yahoo.com>
Date: Thu, 09 Mar 2006 08:23:24 -0800
Lines: 52
Message-ID: <dupkpt$u7q$1@sea.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7Bit
X-Complaints-To: usenet@sea.gmane.org
X-Gmane-NNTP-Posting-Host: gw205.f5.com
User-Agent: KNode/0.10.1
Sender: news <news@sea.gmane.org>
Subject: Advice on the lightweight resolver, lwres.
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 09 Mar 2006 16:25:46 -0000


I was working on converting the STAF (staf.sourceforge.net) project to an 
freebsd port, and on my first attempt, I attempted to use the lightweight
resolver library because of the thread safe functions _r() that were
available.

However once I finished a straight port, I found, that lwres_gethostbyname()
always returns 61 (connection refused).   Nothing ever shows up on tcpdump
on any interface (yes, even lo0).   Of course, just changing the netdb
include and compiling without lwres works.

example of slightly modified code from the staf project:

#include <lwres/netdb.h>
#include <errno.h>
#include <stdio.h>
#define HERROR -1

int main(void)
{

    char buffer[256];
    struct hostent *host;

    if (gethostname(buffer, sizeof(buffer)) == HERROR)
    {
        fprintf(stderr,"Error getting hostname: gethostname() RC=%d\n",
errno);
        return errno;
    }

    host = gethostbyname(buffer);

    if (host == 0)
    {
        fprintf(stderr,"Error getting hostent structure: gethostbyname()
RC=%d\n",errno);
        return errno;
    }

    return 0;

}

$ gcc -o lwres-test lwres-test.c -llwres
$ ./lwres-test
Error getting hostent structure: gethostbyname() RC=61

-- 
othermark
atkin901 at nospam dot yahoo dot com
(!wired)?(coffee++):(wired);