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res_state.c revision 1.5.10.1
      1  1.5.10.1       jdc /*	$NetBSD: res_state.c,v 1.5.10.1 2007/05/17 21:25:19 jdc Exp $	*/
      2       1.1  christos 
      3       1.1  christos /*-
      4       1.1  christos  * Copyright (c) 2004 The NetBSD Foundation, Inc.
      5       1.1  christos  * All rights reserved.
      6       1.1  christos  *
      7       1.1  christos  * This code is derived from software contributed to The NetBSD Foundation
      8       1.1  christos  * by Christos Zoulas.
      9       1.1  christos  *
     10       1.1  christos  * Redistribution and use in source and binary forms, with or without
     11       1.1  christos  * modification, are permitted provided that the following conditions
     12       1.1  christos  * are met:
     13       1.1  christos  * 1. Redistributions of source code must retain the above copyright
     14       1.1  christos  *    notice, this list of conditions and the following disclaimer.
     15       1.1  christos  * 2. Redistributions in binary form must reproduce the above copyright
     16       1.1  christos  *    notice, this list of conditions and the following disclaimer in the
     17       1.1  christos  *    documentation and/or other materials provided with the distribution.
     18       1.1  christos  * 3. All advertising materials mentioning features or use of this software
     19       1.1  christos  *    must display the following acknowledgement:
     20       1.1  christos  *        This product includes software developed by the NetBSD
     21       1.1  christos  *        Foundation, Inc. and its contributors.
     22       1.1  christos  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23       1.1  christos  *    contributors may be used to endorse or promote products derived
     24       1.1  christos  *    from this software without specific prior written permission.
     25       1.1  christos  *
     26       1.1  christos  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27       1.1  christos  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28       1.1  christos  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29       1.1  christos  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30       1.1  christos  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31       1.1  christos  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32       1.1  christos  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33       1.1  christos  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34       1.1  christos  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35       1.1  christos  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36       1.1  christos  * POSSIBILITY OF SUCH DAMAGE.
     37       1.1  christos  */
     38       1.1  christos 
     39       1.1  christos #include <sys/cdefs.h>
     40       1.1  christos #if defined(LIBC_SCCS) && !defined(lint)
     41  1.5.10.1       jdc __RCSID("$NetBSD: res_state.c,v 1.5.10.1 2007/05/17 21:25:19 jdc Exp $");
     42       1.1  christos #endif
     43       1.1  christos 
     44       1.1  christos #include <sys/types.h>
     45       1.1  christos #include <arpa/inet.h>
     46       1.1  christos #include <arpa/nameser.h>
     47       1.4  christos #include <netdb.h>
     48       1.1  christos #include <resolv.h>
     49       1.1  christos 
     50  1.5.10.1       jdc struct __res_state _nres
     51  1.5.10.1       jdc # if defined(__BIND_RES_TEXT)
     52  1.5.10.1       jdc 	= { .retrans = RES_TIMEOUT, }	/*%< Motorola, et al. */
     53  1.5.10.1       jdc # endif
     54  1.5.10.1       jdc 	;
     55       1.1  christos 
     56       1.1  christos res_state __res_get_state_nothread(void);
     57       1.1  christos void __res_put_state_nothread(res_state);
     58       1.1  christos 
     59       1.2  christos #ifdef __weak_alias
     60       1.1  christos __weak_alias(__res_get_state, __res_get_state_nothread)
     61       1.1  christos __weak_alias(__res_put_state, __res_put_state_nothread)
     62       1.3  christos /* Source compatibility; only for single threaded programs */
     63       1.3  christos __weak_alias(__res_state, __res_get_state_nothread)
     64       1.2  christos #endif
     65       1.1  christos 
     66       1.1  christos res_state
     67       1.1  christos __res_get_state_nothread(void)
     68       1.1  christos {
     69       1.5  christos 	if ((_nres.options & RES_INIT) == 0 && res_ninit(&_nres) == -1) {
     70       1.4  christos 		h_errno = NETDB_INTERNAL;
     71       1.4  christos 		return NULL;
     72       1.4  christos 	}
     73       1.5  christos 	return &_nres;
     74       1.1  christos }
     75       1.1  christos 
     76       1.1  christos void
     77       1.1  christos /*ARGSUSED*/
     78       1.1  christos __res_put_state_nothread(res_state res)
     79       1.1  christos {
     80       1.1  christos }
     81