146 lines
5.4 KiB
C
146 lines
5.4 KiB
C
/* $NetBSD: nsdispatch.c,v 1.30 2005/11/29 03:11:59 christos Exp $ */
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/*-
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* Copyright (c) 1997, 1998, 1999, 2004 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Luke Mewburn; and by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 2003 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* Portions of this software were developed for the FreeBSD Project by
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* Jacques A. Vidrine, Safeport Network Services, and Network
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* Associates Laboratories, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <assert.h>
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#include <errno.h>
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#include <nsswitch.h>
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#include <stdarg.h>
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#include <strings.h>
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static nss_method
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_nsmethod(const char *source, const char *database __unused, const char *method __unused,
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const ns_dtab disp_tab[], void **cb_data)
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{
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int curdisp;
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if (disp_tab != NULL) {
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for (curdisp = 0; disp_tab[curdisp].src != NULL; curdisp++) {
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if (strcasecmp(source, disp_tab[curdisp].src) == 0) {
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*cb_data = disp_tab[curdisp].cb_data;
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return (disp_tab[curdisp].callback);
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}
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}
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}
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*cb_data = NULL;
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return (NULL);
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}
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int
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/*ARGSUSED*/
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nsdispatch(void *retval, const ns_dtab disp_tab[], const char *database,
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const char *method, const ns_src defaults[], ...)
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{
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va_list ap;
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int i, result;
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const ns_src *srclist;
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int srclistsize;
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nss_method cb;
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void *cb_data;
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/* retval may be NULL */
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/* disp_tab may be NULL */
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assert(database != NULL);
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assert(method != NULL);
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assert(defaults != NULL);
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if (database == NULL || method == NULL || defaults == NULL)
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return (NS_UNAVAIL);
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srclist = defaults;
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srclistsize = 0;
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while (srclist[srclistsize].name != NULL)
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srclistsize++;
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result = 0;
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for (i = 0; i < srclistsize; i++) {
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cb = _nsmethod(srclist[i].name, database, method,
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disp_tab, &cb_data);
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result = 0;
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if (cb != NULL) {
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va_start(ap, defaults);
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result = (*cb)(retval, cb_data, ap);
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va_end(ap);
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if (defaults[0].flags & NS_FORCEALL)
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continue;
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if (result & srclist[i].flags)
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break;
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/* Stop trying next resolver when there is a memory space fatal error. */
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if ((result & NS_UNAVAIL) != 0 && errno == ENOSPC) {
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break;
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}
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}
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}
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result &= NS_STATUSMASK; /* clear private flags in result */
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return (result ? result : NS_NOTFOUND);
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}
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