bin/88241: [ PATCH ] Incorrect processing of multiple PTR records

[Dan Lukes]

>Number:         88241
>Category:       bin
>Synopsis:       [ PATCH ] Incorrect processing of multiple PTR records
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Oct 30 15:40:19 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Dan Lukes
>Release:        FreeBSD 6.0-RC1 i386
>Organization:
Obludarium
>Environment:
System: FreeBSD 6.0-RC1 #6: Sun Oct 16 21:03:18 CEST 2005 i386
lib/libc/net/name6.c,v 1.54 2005/05/27 20:44:57 ume
lib/libc/net/res_config.h,v 1.8 2002/03/22 23:41:54 obrien

>Description:
	res_config.h define MULTI_PTRS_ARE_ALIASES
	It causes the gethostbyname() fold multiple PTR records into h_aliases
member of struct hostent

	The KAME's getipnodebyaddr() code honor the MULTI_PTRS_ARE_ALIASES
define also, but res_config.h isn't included into linc/net/names6.c nor
other include define the flag. So getipnodebyaddr() ignore the multiple PTRs.

>How-To-Repeat:
	Create code using gethostbyname and getipnodebyaddr, call it for an
addres with multiple PTR records then compare results.
>Fix:

	There are several ways to define the flag. I recommend the
following:

--- patch begins here ---
--- lib/libc/net/name6.c.ORIG	Thu Oct 27 01:18:37 2005
+++ lib/libc/net/name6.c	Thu Oct 27 01:20:27 2005
@@ -119,6 +119,7 @@
 #include <stdarg.h>
 #include <nsswitch.h>
 #include <unistd.h>
+#include "res_config.h"
 #include "un-namespace.h"
 #include "netdb_private.h"
 
--- patch ends here ---
>Release-Note:
>Audit-Trail:
>Unformatted: