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