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res_compat.c revision 1.1 
      1 /*	$NetBSD: res_compat.c,v 1.1 2004/06/09 18:07:03 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2004 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #if defined(LIBC_SCCS) && !defined(lint)
     41 __RCSID("$NetBSD: res_compat.c,v 1.1 2004/06/09 18:07:03 christos Exp $");
     42 #endif
     43 
     44 #include <sys/types.h>
     45 #include <arpa/inet.h>
     46 #include <arpa/nameser.h>
     47 #include <netdb.h>
     48 #include <string.h>
     49 #define __OLD_RES_STATE
     50 #include <resolv.h>
     51 
     52 #undef _res
     53 
     54 /*
     55  * Binary Compatibility; this symbol does not appear in a header file
     56  * Most userland programs use this to set res_options before res_init()
     57  * is called. There are hooks to res_init() to consult the data in this
     58  * structure. The hooks are provided indirectly by the two functions below.
     59  * We depend on the fact the the first 440 [32 bit machines] bytes are
     60  * shared between the two structures.
     61  */
     62 #ifndef __BIND_NOSTATIC
     63 struct __res_state _res
     64 #if defined(__BIND_RES_TEXT)
     65 	= { RES_TIMEOUT, }      /* Motorola, et al. */
     66 # endif
     67 ;
     68 
     69 void *__res_get_old_state(void);
     70 void __res_put_old_state(void *);
     71 
     72 void *
     73 __res_get_old_state(void)
     74 {
     75 	return &_res;
     76 }
     77 
     78 void
     79 __res_put_old_state(void *res)
     80 {
     81 	(void)memcpy(&_res, res, sizeof(_res));
     82 }
     83 #endif
     84