The following reply was made to PR pkg/33511; it has been noted by GNATS.

From: Mark Davies <mark@mcs.vuw.ac.nz>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: pkg/33511: thunderbird doesn't do ldap
Date: Thu, 25 May 2006 14:10:32 +1200

 Turns out it was the old "trying to use ipv6 sockets to do ipv4" issue.  Ldap 
 lookups work if you "sysctl -w net.inet6.ip6.v6only=0".
 
 Below is a patch that fixes it for me by using a v4 socket when dealing with 
 ldap servers that have a v4 address.
 
 $NetBSD$
 
 --- directory/c-sdk/ldap/libraries/libprldap/ldappr-io.c.orig	2006-05-25 
 11:38:04.000000000 +1200
 +++ directory/c-sdk/ldap/libraries/libprldap/ldappr-io.c
 @@ -292,12 +292,12 @@ prldap_try_one_address( struct lextiof_s
       * Set up address and open a TCP socket:
       */
      if ( PR_SUCCESS != PR_SetNetAddr( PR_IpAddrNull, /* don't touch IP addr. 
 */
 -		PRLDAP_DEFAULT_ADDRESS_FAMILY, (PRUint16)port, addrp )) { 
 +		PR_NetAddrFamily( addrp ), (PRUint16)port, addrp )) { 
  	return( -1 );
      }
  
      if (( prsockp->prsock_prfd = PR_OpenTCPSocket(
 -		PRLDAP_DEFAULT_ADDRESS_FAMILY )) == NULL ) {
 +		PR_NetAddrFamily( addrp ))) == NULL ) {
  	return( -1 );
      }
  
 @@ -390,14 +390,14 @@ prldap_connect( const char *hostlist, in
  
  	if ( PR_SUCCESS == PR_StringToNetAddr( host, &addr )) {
  		
 -		if ( PRLDAP_DEFAULT_ADDRESS_FAMILY == PR_AF_INET6 &&
 +		/*if ( PRLDAP_DEFAULT_ADDRESS_FAMILY == PR_AF_INET6 &&
  				PR_AF_INET == PR_NetAddrFamily( &addr )) {
  			PRUint32	ipv4ip = addr.inet.ip;
  			memset( &addr, 0, sizeof(addr));
  			PR_ConvertIPv4AddrToIPv6( ipv4ip, &addr.ipv6.ip );
  			addr.ipv6.family = PR_AF_INET6;
  			
 -		}
 +		}*/
  	    rc = prldap_try_one_address( prsockp, &addr, port,
  			timeout, options );
  	} else {
 
 
 The same issue and patch will apply to firefox and mozilla as well.
 
 cheers
 mark