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 #include <errno.h>
33 #include <netdb.h>
34 #include <nsswitch.h>
35 #include <string.h>
36 #include "netdb_private.h"
37 #ifdef NS_CACHING
38 #include "nscache.h"
39 #endif
40 #include "nss_tls.h"
41
42 static const ns_src defaultsrc[] = {
43 { NSSRC_FILES, NS_SUCCESS },
44 { NULL, 0 }
45 };
46
47 #ifdef NS_CACHING
48 extern int __proto_id_func(char *, size_t *, va_list, void *);
49 extern int __proto_marshal_func(char *, size_t *, void *, va_list, void *);
50 extern int __proto_unmarshal_func(char *, size_t, void *, va_list, void *);
51 #endif
52
53 static int
files_getprotobyname(void * retval,void * mdata,va_list ap)54 files_getprotobyname(void *retval, void *mdata, va_list ap)
55 {
56 struct protoent pe;
57 struct protoent_data *ped;
58 char **cp;
59 int error;
60
61 char *name;
62 struct protoent *pptr;
63 char *buffer;
64 size_t buflen;
65 int *errnop;
66
67 name = va_arg(ap, char *);
68 pptr = va_arg(ap, struct protoent *);
69 buffer = va_arg(ap, char *);
70 buflen = va_arg(ap, size_t);
71 errnop = va_arg(ap, int *);
72
73
74 if ((ped = __protoent_data_init()) == NULL) {
75 *errnop = errno;
76 return (NS_NOTFOUND);
77 }
78
79 __setprotoent_p(ped->stayopen, ped);
80 while ((error = __getprotoent_p(&pe, ped)) == 0) {
81 if (strcmp(pe.p_name, name) == 0)
82 break;
83 for (cp = pe.p_aliases; *cp != 0; cp++)
84 if (strcmp(*cp, name) == 0)
85 goto found;
86 }
87 found:
88 if (!ped->stayopen)
89 __endprotoent_p(ped);
90 if (error != 0) {
91 *errnop = errno;
92 return (NS_NOTFOUND);
93 }
94 if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) {
95 *errnop = errno;
96 return (NS_RETURN);
97 }
98
99 *((struct protoent **)retval) = pptr;
100 return (NS_SUCCESS);
101 }
102
103
104 int
getprotobyname_r(const char * name,struct protoent * pptr,char * buffer,size_t buflen,struct protoent ** result)105 getprotobyname_r(const char *name, struct protoent *pptr, char *buffer,
106 size_t buflen, struct protoent **result)
107 {
108 #ifdef NS_CACHING
109 static const nss_cache_info cache_info =
110 NS_COMMON_CACHE_INFO_INITIALIZER(
111 protocols, (void *)nss_lt_name,
112 __proto_id_func, __proto_marshal_func, __proto_unmarshal_func);
113 #endif
114 static const ns_dtab dtab[] = {
115 { NSSRC_FILES, files_getprotobyname, NULL },
116 #ifdef NS_CACHING
117 NS_CACHE_CB(&cache_info)
118 #endif
119 { NULL, NULL, NULL }
120 };
121 int rv, ret_errno;
122
123 ret_errno = 0;
124 *result = NULL;
125 rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobyname_r",
126 defaultsrc, name, pptr, buffer, buflen, &ret_errno);
127
128 if (rv != NS_SUCCESS) {
129 errno = ret_errno;
130 return (ret_errno);
131 }
132 return (0);
133 }
134
135 struct protoent *
getprotobyname(const char * name)136 getprotobyname(const char *name)
137 {
138 struct protodata *pd;
139 struct protoent *rval;
140
141 if ((pd = __protodata_init()) == NULL)
142 return (NULL);
143 if (getprotobyname_r(name, &pd->proto, pd->data, sizeof(pd->data),
144 &rval) != 0)
145 return (NULL);
146 return (rval);
147 }
148