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 * 3. 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 * @(#)getprotoname.c 8.1 (Berkeley) 6/4/93
30 * $FreeBSD: src/lib/libc/net/getprotoname.c,v 1.7 2007/01/09 00:28:02 imp Exp $
31 */
32
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 static int
files_getprotobyname(void * retval,void * mdata __unused,va_list ap)48 files_getprotobyname(void *retval, void *mdata __unused, va_list ap)
49 {
50 struct protoent pe;
51 struct protoent_data *ped;
52 char **cp;
53 int error;
54
55 char *name;
56 struct protoent *pptr;
57 char *buffer;
58 size_t buflen;
59 int *errnop;
60
61 name = va_arg(ap, char *);
62 pptr = va_arg(ap, struct protoent *);
63 buffer = va_arg(ap, char *);
64 buflen = va_arg(ap, size_t);
65 errnop = va_arg(ap, int *);
66
67
68 if ((ped = __protoent_data_init()) == NULL) {
69 *errnop = -1;
70 return (NS_NOTFOUND);
71 }
72
73 __setprotoent_p(ped->stayopen, ped);
74 while ((error = __getprotoent_p(&pe, ped)) == 0) {
75 if (strcmp(pe.p_name, name) == 0)
76 break;
77 for (cp = pe.p_aliases; *cp != NULL; cp++)
78 if (strcmp(*cp, name) == 0)
79 goto found;
80 }
81 found:
82 if (!ped->stayopen)
83 __endprotoent_p(ped);
84 if (error != 0) {
85 *errnop = -1;
86 return (NS_NOTFOUND);
87 }
88 if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) {
89 *errnop = -1;
90 return (NS_NOTFOUND);
91 }
92
93 *((struct protoent **)retval) = pptr;
94 return (NS_SUCCESS);
95 }
96
97
98 int
getprotobyname_r(const char * name,struct protoent * pptr,char * buffer,size_t buflen,struct protoent ** result)99 getprotobyname_r(const char *name, struct protoent *pptr, char *buffer,
100 size_t buflen, struct protoent **result)
101 {
102 #ifdef NS_CACHING
103 static const nss_cache_info cache_info =
104 NS_COMMON_CACHE_INFO_INITIALIZER(
105 protocols, (void *)nss_lt_name,
106 __proto_id_func, __proto_marshal_func, __proto_unmarshal_func);
107 #endif
108 static const ns_dtab dtab[] = {
109 { NSSRC_FILES, files_getprotobyname, NULL },
110 #ifdef NS_CACHING
111 NS_CACHE_CB(&cache_info)
112 #endif
113 { NULL, NULL, NULL }
114 };
115 int rv, ret_errno;
116
117 ret_errno = 0;
118 *result = NULL;
119 rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobyname_r",
120 defaultsrc, name, pptr, buffer, buflen, &ret_errno);
121
122 if (rv == NS_SUCCESS)
123 return (0);
124 else
125 return (ret_errno);
126 }
127
128 struct protoent *
getprotobyname(const char * name)129 getprotobyname(const char *name)
130 {
131 struct protodata *pd;
132 struct protoent *rval;
133
134 if ((pd = __protodata_init()) == NULL)
135 return (NULL);
136 if (getprotobyname_r(name, &pd->proto, pd->data, sizeof(pd->data),
137 &rval) != 0)
138 return (NULL);
139 return (rval);
140 }
141