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 * @(#)getproto.c 8.1 (Berkeley) 6/4/93
30 * $FreeBSD: src/lib/libc/net/getproto.c,v 1.7 2007/01/09 00:28:02 imp Exp $
31 */
32
33 #include <netdb.h>
34 #include <nsswitch.h>
35 #include "netdb_private.h"
36 #ifdef NS_CACHING
37 #include "nscache.h"
38 #endif
39 #include "nss_tls.h"
40
41 static const ns_src defaultsrc[] = {
42 { NSSRC_FILES, NS_SUCCESS },
43 { NULL, 0 }
44 };
45
46 static int
files_getprotobynumber(void * retval,void * mdata __unused,va_list ap)47 files_getprotobynumber(void *retval, void *mdata __unused, va_list ap)
48 {
49 struct protoent pe;
50 struct protoent_data *ped;
51 int error;
52
53 int number;
54 struct protoent *pptr;
55 char *buffer;
56 size_t buflen;
57 int *errnop;
58
59 number = va_arg(ap, int);
60 pptr = va_arg(ap, struct protoent *);
61 buffer = va_arg(ap, char *);
62 buflen = va_arg(ap, size_t);
63 errnop = va_arg(ap, int *);
64
65 if ((ped = __protoent_data_init()) == NULL) {
66 *errnop = -1;
67 return (NS_NOTFOUND);
68 }
69
70 __setprotoent_p(ped->stayopen, ped);
71 while ((error = __getprotoent_p(&pe, ped)) == 0)
72 if (pe.p_proto == number)
73 break;
74 if (!ped->stayopen)
75 __endprotoent_p(ped);
76 if (error != 0) {
77 *errnop = -1;
78 return (NS_NOTFOUND);
79 }
80 if (__copy_protoent(&pe, pptr, buffer, buflen) != 0) {
81 *errnop = -1;
82 return (NS_NOTFOUND);
83 }
84
85 *((struct protoent **)retval) = pptr;
86 return (NS_SUCCESS);
87 }
88
89 int
getprotobynumber_r(int proto,struct protoent * pptr,char * buffer,size_t buflen,struct protoent ** result)90 getprotobynumber_r(int proto, struct protoent *pptr, char *buffer,
91 size_t buflen, struct protoent **result)
92 {
93 #ifdef NS_CACHING
94 static const nss_cache_info cache_info =
95 NS_COMMON_CACHE_INFO_INITIALIZER(
96 protocols, (void *)nss_lt_id,
97 __proto_id_func, __proto_marshal_func, __proto_unmarshal_func);
98 #endif
99
100 static const ns_dtab dtab[] = {
101 { NSSRC_FILES, files_getprotobynumber, NULL },
102 #ifdef NS_CACHING
103 NS_CACHE_CB(&cache_info)
104 #endif
105 { NULL, NULL, NULL }
106 };
107 int rv, ret_errno;
108
109 ret_errno = 0;
110 *result = NULL;
111 rv = nsdispatch(result, dtab, NSDB_PROTOCOLS, "getprotobynumber_r",
112 defaultsrc, proto, pptr, buffer, buflen, &ret_errno);
113
114 if (rv == NS_SUCCESS)
115 return (0);
116 else
117 return (ret_errno);
118 }
119
120 struct protoent *
getprotobynumber(int proto)121 getprotobynumber(int proto)
122 {
123 struct protodata *pd;
124 struct protoent *rval;
125
126 if ((pd = __protodata_init()) == NULL)
127 return (NULL);
128 if (getprotobynumber_r(proto, &pd->proto, pd->data, sizeof(pd->data),
129 &rval) != 0)
130 return (NULL);
131 return (rval);
132 }
133