2 * Copyright (c) 1989, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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35 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
36 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
38 * Permission to use, copy, modify, and distribute this software for any
39 * purpose with or without fee is hereby granted, provided that the above
40 * copyright notice and this permission notice appear in all copies.
42 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
43 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
44 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
45 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
46 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
47 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
48 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
51 /* from getgrent.c 8.2 (Berkeley) 3/21/94"; */
52 /* from BSDI Id: getgrent.c,v 2.8 1996/05/28 18:15:14 bostic Exp $ */
56 #include "port_before.h"
58 #include <sys/types.h>
59 #include <sys/socket.h>
61 #include <netinet/in.h>
62 #include <arpa/inet.h>
63 #include <arpa/nameser.h>
73 #include <isc/memcluster.h>
75 #include "port_after.h"
88 char * aliases
[MAXALIASES
];
89 char addr
[MAXADDRSIZE
];
90 struct __res_state
* res
;
91 void (*free_res
)(void *);
96 static void nw_close(struct irs_nw
*);
97 static struct nwent
* nw_byname(struct irs_nw
*, const char *, int);
98 static struct nwent
* nw_byaddr(struct irs_nw
*, void *, int, int);
99 static struct nwent
* nw_next(struct irs_nw
*);
100 static void nw_rewind(struct irs_nw
*);
101 static void nw_minimize(struct irs_nw
*);
102 static struct __res_state
* nw_res_get(struct irs_nw
*this);
103 static void nw_res_set(struct irs_nw
*this,
104 struct __res_state
*res
,
105 void (*free_res
)(void *));
107 static int init(struct irs_nw
*this);
118 irs_lcl_nw(struct irs_acc
*this) {
124 if (!(pvt
= memget(sizeof *pvt
))) {
128 memset(pvt
, 0, sizeof *pvt
);
129 if (!(nw
= memget(sizeof *nw
))) {
130 memput(pvt
, sizeof *pvt
);
134 memset(nw
, 0x5e, sizeof *nw
);
136 nw
->close
= nw_close
;
137 nw
->byname
= nw_byname
;
138 nw
->byaddr
= nw_byaddr
;
140 nw
->rewind
= nw_rewind
;
141 nw
->minimize
= nw_minimize
;
142 nw
->res_get
= nw_res_get
;
143 nw
->res_set
= nw_res_set
;
150 nw_close(struct irs_nw
*this) {
151 struct pvt
*pvt
= (struct pvt
*)this->private;
154 if (pvt
->res
&& pvt
->free_res
)
155 (*pvt
->free_res
)(pvt
->res
);
157 (void)fclose(pvt
->fp
);
158 memput(pvt
, sizeof *pvt
);
159 memput(this, sizeof *this);
162 static struct nwent
*
163 nw_byaddr(struct irs_nw
*this, void *net
, int length
, int type
) {
166 if (init(this) == -1)
170 while ((p
= nw_next(this)) != NULL
)
171 if (p
->n_addrtype
== type
&& p
->n_length
== length
)
172 if (bitncmp(p
->n_addr
, net
, length
) == 0)
177 static struct nwent
*
178 nw_byname(struct irs_nw
*this, const char *name
, int type
) {
182 if (init(this) == -1)
186 while ((p
= nw_next(this)) != NULL
) {
187 if (ns_samename(p
->n_name
, name
) == 1 &&
188 p
->n_addrtype
== type
)
190 for (ap
= p
->n_aliases
; *ap
; ap
++)
191 if ((ns_samename(*ap
, name
) == 1) &&
192 (p
->n_addrtype
== type
))
200 nw_rewind(struct irs_nw
*this) {
201 struct pvt
*pvt
= (struct pvt
*)this->private;
204 if (fseek(pvt
->fp
, 0L, SEEK_SET
) == 0)
206 (void)fclose(pvt
->fp
);
208 if (!(pvt
->fp
= fopen(_PATH_NETWORKS
, "r")))
210 if (fcntl(fileno(pvt
->fp
), F_SETFD
, 1) < 0) {
211 (void)fclose(pvt
->fp
);
216 static struct nwent
*
217 nw_next(struct irs_nw
*this) {
218 struct pvt
*pvt
= (struct pvt
*)this->private;
219 struct nwent
*ret
= NULL
;
221 char *bufp
, *ndbuf
, *dbuf
= NULL
;
222 int c
, bufsiz
, offset
= 0;
224 if (init(this) == -1)
229 if (pvt
->fp
== NULL
) {
230 RES_SET_H_ERRNO(pvt
->res
, NETDB_INTERNAL
);
234 bufsiz
= sizeof(pvt
->line
);
237 p
= fgets(bufp
+ offset
, bufsiz
- offset
, pvt
->fp
);
240 if (!strchr(p
, '\n') && !feof(pvt
->fp
)) {
242 /* allocate space for longer line */
244 if ((ndbuf
= malloc(bufsiz
+ GROWBUF
)) != NULL
)
247 ndbuf
= realloc(dbuf
, bufsiz
+ GROWBUF
);
252 offset
= strlen(dbuf
);
254 /* allocation failed; skip this long line */
255 while ((c
= getc(pvt
->fp
)) != EOF
)
270 cp
= strpbrk(p
, "#\n");
274 cp
= strpbrk(p
, " \t");
278 while (*cp
== ' ' || *cp
== '\t')
280 p
= strpbrk(cp
, " \t");
283 pvt
->net
.n_length
= inet_net_pton(AF_INET
, cp
, pvt
->addr
,
285 if (pvt
->net
.n_length
< 0)
287 pvt
->net
.n_addrtype
= AF_INET
;
288 pvt
->net
.n_addr
= pvt
->addr
;
289 q
= pvt
->net
.n_aliases
= pvt
->aliases
;
293 if (*cp
== ' ' || *cp
== '\t') {
297 if (q
< &pvt
->aliases
[MAXALIASES
- 1])
299 cp
= strpbrk(cp
, " \t");
314 nw_minimize(struct irs_nw
*this) {
315 struct pvt
*pvt
= (struct pvt
*)this->private;
318 res_nclose(pvt
->res
);
319 if (pvt
->fp
!= NULL
) {
320 (void)fclose(pvt
->fp
);
325 static struct __res_state
*
326 nw_res_get(struct irs_nw
*this) {
327 struct pvt
*pvt
= (struct pvt
*)this->private;
330 struct __res_state
*res
;
331 res
= (struct __res_state
*)malloc(sizeof *res
);
336 memset(res
, 0, sizeof *res
);
337 nw_res_set(this, res
, free
);
344 nw_res_set(struct irs_nw
*this, struct __res_state
*res
,
345 void (*free_res
)(void *)) {
346 struct pvt
*pvt
= (struct pvt
*)this->private;
348 if (pvt
->res
&& pvt
->free_res
) {
349 res_nclose(pvt
->res
);
350 (*pvt
->free_res
)(pvt
->res
);
354 pvt
->free_res
= free_res
;
358 init(struct irs_nw
*this) {
359 struct pvt
*pvt
= (struct pvt
*)this->private;
361 if (!pvt
->res
&& !nw_res_get(this))
363 if (((pvt
->res
->options
& RES_INIT
) == 0U) &&
364 res_ninit(pvt
->res
) == -1)