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