xref: /freebsd/lib/libc/net/getprotoname.c (revision 8a16b7a18f5d0b031f09832fd7752fba717e2a97)
1*8a16b7a1SPedro F. Giffuni /*-
2*8a16b7a1SPedro F. Giffuni  * SPDX-License-Identifier: BSD-3-Clause
3*8a16b7a1SPedro F. Giffuni  *
458f0484fSRodney W. Grimes  * Copyright (c) 1983, 1993
558f0484fSRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
658f0484fSRodney W. Grimes  *
758f0484fSRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
858f0484fSRodney W. Grimes  * modification, are permitted provided that the following conditions
958f0484fSRodney W. Grimes  * are met:
1058f0484fSRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
1158f0484fSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
1258f0484fSRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
1358f0484fSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
1458f0484fSRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
15fbbd9655SWarner Losh  * 3. Neither the name of the University nor the names of its contributors
1658f0484fSRodney W. Grimes  *    may be used to endorse or promote products derived from this software
1758f0484fSRodney W. Grimes  *    without specific prior written permission.
1858f0484fSRodney W. Grimes  *
1958f0484fSRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2058f0484fSRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2158f0484fSRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2258f0484fSRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2358f0484fSRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2458f0484fSRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2558f0484fSRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2658f0484fSRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2758f0484fSRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2858f0484fSRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2958f0484fSRodney W. Grimes  * SUCH DAMAGE.
3058f0484fSRodney W. Grimes  */
3158f0484fSRodney W. Grimes 
3258f0484fSRodney W. Grimes #if defined(LIBC_SCCS) && !defined(lint)
3358f0484fSRodney W. Grimes static char sccsid[] = "@(#)getprotoname.c	8.1 (Berkeley) 6/4/93";
3458f0484fSRodney W. Grimes #endif /* LIBC_SCCS and not lint */
358fb3f3f6SDavid E. O'Brien #include <sys/cdefs.h>
368fb3f3f6SDavid E. O'Brien __FBSDID("$FreeBSD$");
3758f0484fSRodney W. Grimes 
38225edeacSHajimu UMEMOTO #include <errno.h>
3958f0484fSRodney W. Grimes #include <netdb.h>
4006a99fe3SHajimu UMEMOTO #include <nsswitch.h>
4158f0484fSRodney W. Grimes #include <string.h>
4292b6f7beSHajimu UMEMOTO #include "netdb_private.h"
4306a99fe3SHajimu UMEMOTO #ifdef NS_CACHING
4406a99fe3SHajimu UMEMOTO #include "nscache.h"
4506a99fe3SHajimu UMEMOTO #endif
4606a99fe3SHajimu UMEMOTO #include "nss_tls.h"
4758f0484fSRodney W. Grimes 
4806a99fe3SHajimu UMEMOTO static const ns_src defaultsrc[] = {
4906a99fe3SHajimu UMEMOTO 	{ NSSRC_FILES, NS_SUCCESS },
5006a99fe3SHajimu UMEMOTO 	{ NULL, 0 }
5106a99fe3SHajimu UMEMOTO };
5206a99fe3SHajimu UMEMOTO 
5306a99fe3SHajimu UMEMOTO #ifdef NS_CACHING
5406a99fe3SHajimu UMEMOTO extern int __proto_id_func(char *, size_t *, va_list, void *);
5506a99fe3SHajimu UMEMOTO extern int __proto_marshal_func(char *, size_t *, void *, va_list, void *);
5606a99fe3SHajimu UMEMOTO extern int __proto_unmarshal_func(char *, size_t, void *, va_list, void *);
5706a99fe3SHajimu UMEMOTO #endif
5806a99fe3SHajimu UMEMOTO 
5906a99fe3SHajimu UMEMOTO static int
6006a99fe3SHajimu UMEMOTO files_getprotobyname(void *retval, void *mdata, va_list ap)
6158f0484fSRodney W. Grimes {
62d3ac2b30SHajimu UMEMOTO 	struct protoent pe;
63d3ac2b30SHajimu UMEMOTO 	struct protoent_data *ped;
648fb3f3f6SDavid E. O'Brien 	char **cp;
6592b6f7beSHajimu UMEMOTO 	int error;
6658f0484fSRodney W. Grimes 
6706a99fe3SHajimu UMEMOTO 	char *name;
6806a99fe3SHajimu UMEMOTO 	struct protoent	*pptr;
6906a99fe3SHajimu UMEMOTO 	char *buffer;
7006a99fe3SHajimu UMEMOTO 	size_t buflen;
7106a99fe3SHajimu UMEMOTO 	int *errnop;
7206a99fe3SHajimu UMEMOTO 
7306a99fe3SHajimu UMEMOTO 	name = va_arg(ap, char *);
7406a99fe3SHajimu UMEMOTO 	pptr = va_arg(ap, struct protoent *);
7506a99fe3SHajimu UMEMOTO 	buffer = va_arg(ap, char *);
7606a99fe3SHajimu UMEMOTO 	buflen = va_arg(ap, size_t);
7706a99fe3SHajimu UMEMOTO 	errnop = va_arg(ap, int *);
7806a99fe3SHajimu UMEMOTO 
7906a99fe3SHajimu UMEMOTO 
8006a99fe3SHajimu UMEMOTO 	if ((ped = __protoent_data_init()) == NULL) {
81225edeacSHajimu UMEMOTO 		*errnop = errno;
8206a99fe3SHajimu UMEMOTO 		return (NS_NOTFOUND);
8306a99fe3SHajimu UMEMOTO 	}
84d3ac2b30SHajimu UMEMOTO 
85d3ac2b30SHajimu UMEMOTO 	__setprotoent_p(ped->stayopen, ped);
86d3ac2b30SHajimu UMEMOTO 	while ((error = __getprotoent_p(&pe, ped)) == 0) {
87d3ac2b30SHajimu UMEMOTO 		if (strcmp(pe.p_name, name) == 0)
8858f0484fSRodney W. Grimes 			break;
89d3ac2b30SHajimu UMEMOTO 		for (cp = pe.p_aliases; *cp != 0; cp++)
9058f0484fSRodney W. Grimes 			if (strcmp(*cp, name) == 0)
9158f0484fSRodney W. Grimes 				goto found;
9258f0484fSRodney W. Grimes 	}
9358f0484fSRodney W. Grimes found:
9492b6f7beSHajimu UMEMOTO 	if (!ped->stayopen)
95d3ac2b30SHajimu UMEMOTO 		__endprotoent_p(ped);
9606a99fe3SHajimu UMEMOTO 	if (error != 0) {
97225edeacSHajimu UMEMOTO 		*errnop = errno;
9806a99fe3SHajimu UMEMOTO 		return (NS_NOTFOUND);
9906a99fe3SHajimu UMEMOTO 	}
10006a99fe3SHajimu UMEMOTO 	if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) {
101225edeacSHajimu UMEMOTO 		*errnop = errno;
102225edeacSHajimu UMEMOTO 		return (NS_RETURN);
10306a99fe3SHajimu UMEMOTO 	}
10406a99fe3SHajimu UMEMOTO 
10506a99fe3SHajimu UMEMOTO 	*((struct protoent **)retval) = pptr;
10606a99fe3SHajimu UMEMOTO 	return (NS_SUCCESS);
10706a99fe3SHajimu UMEMOTO }
10806a99fe3SHajimu UMEMOTO 
10906a99fe3SHajimu UMEMOTO 
11006a99fe3SHajimu UMEMOTO int
11106a99fe3SHajimu UMEMOTO getprotobyname_r(const char *name, struct protoent *pptr, char *buffer,
11206a99fe3SHajimu UMEMOTO     size_t buflen, struct protoent **result)
11306a99fe3SHajimu UMEMOTO {
11406a99fe3SHajimu UMEMOTO #ifdef NS_CACHING
11506a99fe3SHajimu UMEMOTO 	static const nss_cache_info cache_info =
11606a99fe3SHajimu UMEMOTO 		NS_COMMON_CACHE_INFO_INITIALIZER(
11706a99fe3SHajimu UMEMOTO 		protocols, (void *)nss_lt_name,
11806a99fe3SHajimu UMEMOTO 		__proto_id_func, __proto_marshal_func, __proto_unmarshal_func);
11906a99fe3SHajimu UMEMOTO #endif
12006a99fe3SHajimu UMEMOTO 	static const ns_dtab dtab[] = {
12106a99fe3SHajimu UMEMOTO 		{ NSSRC_FILES, files_getprotobyname, NULL },
12206a99fe3SHajimu UMEMOTO #ifdef NS_CACHING
12306a99fe3SHajimu UMEMOTO 		NS_CACHE_CB(&cache_info)
12406a99fe3SHajimu UMEMOTO #endif
12506a99fe3SHajimu UMEMOTO 		{ NULL, NULL, NULL }
12606a99fe3SHajimu UMEMOTO 	};
12706a99fe3SHajimu UMEMOTO 	int	rv, ret_errno;
12806a99fe3SHajimu UMEMOTO 
12906a99fe3SHajimu UMEMOTO 	ret_errno = 0;
13006a99fe3SHajimu UMEMOTO 	*result = NULL;
13106a99fe3SHajimu UMEMOTO 	rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobyname_r",
13206a99fe3SHajimu UMEMOTO 	    defaultsrc, name, pptr, buffer, buflen, &ret_errno);
13306a99fe3SHajimu UMEMOTO 
134225edeacSHajimu UMEMOTO 	if (rv != NS_SUCCESS) {
135225edeacSHajimu UMEMOTO 		errno = ret_errno;
136c618a856SHajimu UMEMOTO 		return (ret_errno);
137225edeacSHajimu UMEMOTO 	}
138d3ac2b30SHajimu UMEMOTO 	return (0);
13992b6f7beSHajimu UMEMOTO }
14092b6f7beSHajimu UMEMOTO 
14192b6f7beSHajimu UMEMOTO struct protoent *
14292b6f7beSHajimu UMEMOTO getprotobyname(const char *name)
14392b6f7beSHajimu UMEMOTO {
14492b6f7beSHajimu UMEMOTO 	struct protodata *pd;
145d3ac2b30SHajimu UMEMOTO 	struct protoent *rval;
14692b6f7beSHajimu UMEMOTO 
14792b6f7beSHajimu UMEMOTO 	if ((pd = __protodata_init()) == NULL)
14892b6f7beSHajimu UMEMOTO 		return (NULL);
149d3ac2b30SHajimu UMEMOTO 	if (getprotobyname_r(name, &pd->proto, pd->data, sizeof(pd->data),
150d3ac2b30SHajimu UMEMOTO 	    &rval) != 0)
15192b6f7beSHajimu UMEMOTO 		return (NULL);
152d3ac2b30SHajimu UMEMOTO 	return (rval);
15358f0484fSRodney W. Grimes }
154