1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1983, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#if defined(LIBC_SCCS) && !defined(lint)
33static char sccsid[] = "@(#)getprotoname.c	8.1 (Berkeley) 6/4/93";
34#endif /* LIBC_SCCS and not lint */
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38#include <errno.h>
39#include <netdb.h>
40#include <nsswitch.h>
41#include <string.h>
42#include "netdb_private.h"
43#ifdef NS_CACHING
44#include "nscache.h"
45#endif
46#include "nss_tls.h"
47
48static const ns_src defaultsrc[] = {
49	{ NSSRC_FILES, NS_SUCCESS },
50	{ NULL, 0 }
51};
52
53#ifdef NS_CACHING
54extern int __proto_id_func(char *, size_t *, va_list, void *);
55extern int __proto_marshal_func(char *, size_t *, void *, va_list, void *);
56extern int __proto_unmarshal_func(char *, size_t, void *, va_list, void *);
57#endif
58
59static int
60files_getprotobyname(void *retval, void *mdata, va_list ap)
61{
62	struct protoent pe;
63	struct protoent_data *ped;
64	char **cp;
65	int error;
66
67	char *name;
68	struct protoent	*pptr;
69	char *buffer;
70	size_t buflen;
71	int *errnop;
72
73	name = va_arg(ap, char *);
74	pptr = va_arg(ap, struct protoent *);
75	buffer = va_arg(ap, char *);
76	buflen = va_arg(ap, size_t);
77	errnop = va_arg(ap, int *);
78
79
80	if ((ped = __protoent_data_init()) == NULL) {
81		*errnop = errno;
82		return (NS_NOTFOUND);
83	}
84
85	__setprotoent_p(ped->stayopen, ped);
86	while ((error = __getprotoent_p(&pe, ped)) == 0) {
87		if (strcmp(pe.p_name, name) == 0)
88			break;
89		for (cp = pe.p_aliases; *cp != 0; cp++)
90			if (strcmp(*cp, name) == 0)
91				goto found;
92	}
93found:
94	if (!ped->stayopen)
95		__endprotoent_p(ped);
96	if (error != 0) {
97		*errnop = errno;
98		return (NS_NOTFOUND);
99	}
100	if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) {
101		*errnop = errno;
102		return (NS_RETURN);
103	}
104
105	*((struct protoent **)retval) = pptr;
106	return (NS_SUCCESS);
107}
108
109
110int
111getprotobyname_r(const char *name, struct protoent *pptr, char *buffer,
112    size_t buflen, struct protoent **result)
113{
114#ifdef NS_CACHING
115	static const nss_cache_info cache_info =
116		NS_COMMON_CACHE_INFO_INITIALIZER(
117		protocols, (void *)nss_lt_name,
118		__proto_id_func, __proto_marshal_func, __proto_unmarshal_func);
119#endif
120	static const ns_dtab dtab[] = {
121		{ NSSRC_FILES, files_getprotobyname, NULL },
122#ifdef NS_CACHING
123		NS_CACHE_CB(&cache_info)
124#endif
125		{ NULL, NULL, NULL }
126	};
127	int	rv, ret_errno;
128
129	ret_errno = 0;
130	*result = NULL;
131	rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobyname_r",
132	    defaultsrc, name, pptr, buffer, buflen, &ret_errno);
133
134	if (rv != NS_SUCCESS) {
135		errno = ret_errno;
136		return (ret_errno);
137	}
138	return (0);
139}
140
141struct protoent *
142getprotobyname(const char *name)
143{
144	struct protodata *pd;
145	struct protoent *rval;
146
147	if ((pd = __protodata_init()) == NULL)
148		return (NULL);
149	if (getprotobyname_r(name, &pd->proto, pd->data, sizeof(pd->data),
150	    &rval) != 0)
151		return (NULL);
152	return (rval);
153}
154