BIND: update vendor tree to 9.5.2-P2
[dragonfly.git] / contrib / bind / lib / bind / irs / getnetent_r.c
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1/*
2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (c) 1998-1999 by Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#if defined(LIBC_SCCS) && !defined(lint)
19static const char rcsid[] = "$Id: getnetent_r.c,v 1.6 2005/09/03 12:41:38 marka Exp $";
20#endif /* LIBC_SCCS and not lint */
21
22#include <port_before.h>
23#if !defined(_REENTRANT) || !defined(DO_PTHREADS)
24 static int getnetent_r_not_required = 0;
25#else
26#include <errno.h>
27#include <string.h>
28#include <stdio.h>
29#include <sys/types.h>
30#include <netinet/in.h>
31#include <netdb.h>
32#include <sys/param.h>
33#include <port_after.h>
34
35#ifdef NET_R_RETURN
36
37static NET_R_RETURN
38copy_netent(struct netent *, struct netent *, NET_R_COPY_ARGS);
39
40NET_R_RETURN
41getnetbyname_r(const char *name, struct netent *nptr, NET_R_ARGS) {
42 struct netent *ne = getnetbyname(name);
43#ifdef NET_R_SETANSWER
44 int n = 0;
45
46 if (ne == NULL || (n = copy_netent(ne, nptr, NET_R_COPY)) != 0)
47 *answerp = NULL;
48 else
49 *answerp = ne;
50 if (ne == NULL)
51 *h_errnop = h_errno;
52 return (n);
53#else
54 if (ne == NULL)
55 return (NET_R_BAD);
56
57 return (copy_netent(ne, nptr, NET_R_COPY));
58#endif
59}
60
61#ifndef GETNETBYADDR_ADDR_T
62#define GETNETBYADDR_ADDR_T long
63#endif
64NET_R_RETURN
65getnetbyaddr_r(GETNETBYADDR_ADDR_T addr, int type, struct netent *nptr, NET_R_ARGS) {
66 struct netent *ne = getnetbyaddr(addr, type);
67#ifdef NET_R_SETANSWER
68 int n = 0;
69
70 if (ne == NULL || (n = copy_netent(ne, nptr, NET_R_COPY)) != 0)
71 *answerp = NULL;
72 else
73 *answerp = ne;
74 if (ne == NULL)
75 *h_errnop = h_errno;
76 return (n);
77#else
78
79 if (ne == NULL)
80 return (NET_R_BAD);
81
82 return (copy_netent(ne, nptr, NET_R_COPY));
83#endif
84}
85
86/*%
87 * These assume a single context is in operation per thread.
88 * If this is not the case we will need to call irs directly
89 * rather than through the base functions.
90 */
91
92NET_R_RETURN
93getnetent_r(struct netent *nptr, NET_R_ARGS) {
94 struct netent *ne = getnetent();
95#ifdef NET_R_SETANSWER
96 int n = 0;
97
98 if (ne == NULL || (n = copy_netent(ne, nptr, NET_R_COPY)) != 0)
99 *answerp = NULL;
100 else
101 *answerp = ne;
102 if (ne == NULL)
103 *h_errnop = h_errno;
104 return (n);
105#else
106
107 if (ne == NULL)
108 return (NET_R_BAD);
109
110 return (copy_netent(ne, nptr, NET_R_COPY));
111#endif
112}
113
114NET_R_SET_RETURN
115#ifdef NET_R_ENT_ARGS
116setnetent_r(int stay_open, NET_R_ENT_ARGS)
117#else
118setnetent_r(int stay_open)
119#endif
120{
121#ifdef NET_R_ENT_ARGS
122 UNUSED(ndptr);
123#endif
124 setnetent(stay_open);
125#ifdef NET_R_SET_RESULT
126 return (NET_R_SET_RESULT);
127#endif
128}
129
130NET_R_END_RETURN
131#ifdef NET_R_ENT_ARGS
132endnetent_r(NET_R_ENT_ARGS)
133#else
134endnetent_r()
135#endif
136{
137#ifdef NET_R_ENT_ARGS
138 UNUSED(ndptr);
139#endif
140 endnetent();
141 NET_R_END_RESULT(NET_R_OK);
142}
143
144/* Private */
145
146#ifndef NETENT_DATA
147static NET_R_RETURN
148copy_netent(struct netent *ne, struct netent *nptr, NET_R_COPY_ARGS) {
149 char *cp;
150 int i, n;
151 int numptr, len;
152
153 /* Find out the amount of space required to store the answer. */
154 numptr = 1; /*%< NULL ptr */
155 len = (char *)ALIGN(buf) - buf;
156 for (i = 0; ne->n_aliases[i]; i++, numptr++) {
157 len += strlen(ne->n_aliases[i]) + 1;
158 }
159 len += strlen(ne->n_name) + 1;
160 len += numptr * sizeof(char*);
161
162 if (len > (int)buflen) {
163 errno = ERANGE;
164 return (NET_R_BAD);
165 }
166
167 /* copy net value and type */
168 nptr->n_addrtype = ne->n_addrtype;
169 nptr->n_net = ne->n_net;
170
171 cp = (char *)ALIGN(buf) + numptr * sizeof(char *);
172
173 /* copy official name */
174 n = strlen(ne->n_name) + 1;
175 strcpy(cp, ne->n_name);
176 nptr->n_name = cp;
177 cp += n;
178
179 /* copy aliases */
180 nptr->n_aliases = (char **)ALIGN(buf);
181 for (i = 0 ; ne->n_aliases[i]; i++) {
182 n = strlen(ne->n_aliases[i]) + 1;
183 strcpy(cp, ne->n_aliases[i]);
184 nptr->n_aliases[i] = cp;
185 cp += n;
186 }
187 nptr->n_aliases[i] = NULL;
188
189 return (NET_R_OK);
190}
191#else /* !NETENT_DATA */
192static int
193copy_netent(struct netent *ne, struct netent *nptr, NET_R_COPY_ARGS) {
194 char *cp, *eob;
195 int i, n;
196
197 /* copy net value and type */
198 nptr->n_addrtype = ne->n_addrtype;
199 nptr->n_net = ne->n_net;
200
201 /* copy official name */
202 cp = ndptr->line;
203 eob = ndptr->line + sizeof(ndptr->line);
204 if ((n = strlen(ne->n_name) + 1) < (eob - cp)) {
205 strcpy(cp, ne->n_name);
206 nptr->n_name = cp;
207 cp += n;
208 } else {
209 return (-1);
210 }
211
212 /* copy aliases */
213 i = 0;
214 nptr->n_aliases = ndptr->net_aliases;
215 while (ne->n_aliases[i] && i < (_MAXALIASES-1)) {
216 if ((n = strlen(ne->n_aliases[i]) + 1) < (eob - cp)) {
217 strcpy(cp, ne->n_aliases[i]);
218 nptr->n_aliases[i] = cp;
219 cp += n;
220 } else {
221 break;
222 }
223 i++;
224 }
225 nptr->n_aliases[i] = NULL;
226
227 return (NET_R_OK);
228}
229#endif /* !NETENT_DATA */
230#else /* NET_R_RETURN */
231 static int getnetent_r_unknown_system = 0;
232#endif /* NET_R_RETURN */
233#endif /* !defined(_REENTRANT) || !defined(DO_PTHREADS) */
234/*! \file */