2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (c) 1996,1999 by Internet Software Consortium.
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.
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.
18 #if defined(LIBC_SCCS) && !defined(lint)
19 static const char rcsid[] = "$Id: nis_nw.c,v 1.3.18.1 2005/04/27 05:01:03 sra Exp $";
20 #endif /* LIBC_SCCS and not lint */
24 #include "port_before.h"
27 static int __bind_irs_nis_unneeded;
30 #include <sys/types.h>
31 #include <sys/socket.h>
33 #include <netinet/in.h>
34 #include <arpa/inet.h>
35 #include <arpa/nameser.h>
37 #undef T_NULL /* Silence re-definition warning of T_NULL. */
41 #include <rpcsvc/yp_prot.h>
42 #include <rpcsvc/ypclnt.h>
50 #include <isc/memcluster.h>
53 #include "port_after.h"
74 char * aliases[MAXALIASES + 1];
75 u_char addr[MAXADDRSIZE];
77 struct __res_state * res;
78 void (*free_res)(void *);
81 enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 };
83 static /*const*/ char networks_byname[] = "networks.byname";
84 static /*const*/ char networks_byaddr[] = "networks.byaddr";
88 static void nw_close(struct irs_nw *);
89 static struct nwent * nw_byname(struct irs_nw *, const char *, int);
90 static struct nwent * nw_byaddr(struct irs_nw *, void *, int, int);
91 static struct nwent * nw_next(struct irs_nw *);
92 static void nw_rewind(struct irs_nw *);
93 static void nw_minimize(struct irs_nw *);
94 static struct __res_state * nw_res_get(struct irs_nw *this);
95 static void nw_res_set(struct irs_nw *this,
96 struct __res_state *res,
97 void (*free_res)(void *));
99 static struct nwent * makenwent(struct irs_nw *this);
100 static void nisfree(struct pvt *, enum do_what);
101 static int init(struct irs_nw *this);
106 irs_nis_nw(struct irs_acc *this) {
110 if (!(pvt = memget(sizeof *pvt))) {
114 memset(pvt, 0, sizeof *pvt);
115 if (!(nw = memget(sizeof *nw))) {
116 memput(pvt, sizeof *pvt);
120 memset(nw, 0x5e, sizeof *nw);
122 pvt->nis_domain = ((struct nis_p *)this->private)->domain;
124 nw->close = nw_close;
125 nw->byname = nw_byname;
126 nw->byaddr = nw_byaddr;
128 nw->rewind = nw_rewind;
129 nw->minimize = nw_minimize;
130 nw->res_get = nw_res_get;
131 nw->res_set = nw_res_set;
138 nw_close(struct irs_nw *this) {
139 struct pvt *pvt = (struct pvt *)this->private;
142 if (pvt->res && pvt->free_res)
143 (*pvt->free_res)(pvt->res);
146 memput(pvt, sizeof *pvt);
147 memput(this, sizeof *this);
150 static struct nwent *
151 nw_byaddr(struct irs_nw *this, void *net, int length, int af) {
152 struct pvt *pvt = (struct pvt *)this->private;
153 char tmp[sizeof "255.255.255.255/32"], *t;
156 if (init(this) == -1)
160 RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
161 errno = EAFNOSUPPORT;
164 nisfree(pvt, do_val);
165 /* Try it with /CIDR first. */
166 if (inet_net_ntop(AF_INET, net, length, tmp, sizeof tmp) == NULL) {
167 RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
170 r = yp_match(pvt->nis_domain, networks_byaddr, tmp, strlen(tmp),
171 &pvt->curval_data, &pvt->curval_len);
173 /* Give it a shot without the /CIDR. */
174 if ((t = strchr(tmp, '/')) != NULL) {
176 r = yp_match(pvt->nis_domain, networks_byaddr,
178 &pvt->curval_data, &pvt->curval_len);
181 RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
185 return (makenwent(this));
188 static struct nwent *
189 nw_byname(struct irs_nw *this, const char *name, int af) {
190 struct pvt *pvt = (struct pvt *)this->private;
194 if (init(this) == -1)
198 RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL);
199 errno = EAFNOSUPPORT;
202 nisfree(pvt, do_val);
204 r = yp_match(pvt->nis_domain, networks_byname, tmp,
205 strlen(tmp), &pvt->curval_data, &pvt->curval_len);
207 RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
210 return (makenwent(this));
214 nw_rewind(struct irs_nw *this) {
215 struct pvt *pvt = (struct pvt *)this->private;
220 static struct nwent *
221 nw_next(struct irs_nw *this) {
222 struct pvt *pvt = (struct pvt *)this->private;
226 if (init(this) == -1)
230 if (pvt->needrewind) {
231 nisfree(pvt, do_all);
232 r = yp_first(pvt->nis_domain, networks_byaddr,
233 &pvt->curkey_data, &pvt->curkey_len,
234 &pvt->curval_data, &pvt->curval_len);
240 nisfree(pvt, do_val);
241 r = yp_next(pvt->nis_domain, networks_byaddr,
242 pvt->curkey_data, pvt->curkey_len,
243 &newkey_data, &newkey_len,
244 &pvt->curval_data, &pvt->curval_len);
245 nisfree(pvt, do_key);
246 pvt->curkey_data = newkey_data;
247 pvt->curkey_len = newkey_len;
250 RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND);
253 rval = makenwent(this);
254 } while (rval == NULL);
259 nw_minimize(struct irs_nw *this) {
260 struct pvt *pvt = (struct pvt *)this->private;
263 res_nclose(pvt->res);
266 static struct __res_state *
267 nw_res_get(struct irs_nw *this) {
268 struct pvt *pvt = (struct pvt *)this->private;
271 struct __res_state *res;
272 res = (struct __res_state *)malloc(sizeof *res);
277 memset(res, 0, sizeof *res);
278 nw_res_set(this, res, free);
285 nw_res_set(struct irs_nw *this, struct __res_state *res,
286 void (*free_res)(void *)) {
287 struct pvt *pvt = (struct pvt *)this->private;
289 if (pvt->res && pvt->free_res) {
290 res_nclose(pvt->res);
291 (*pvt->free_res)(pvt->res);
295 pvt->free_res = free_res;
300 static struct nwent *
301 makenwent(struct irs_nw *this) {
302 struct pvt *pvt = (struct pvt *)this->private;
303 static const char spaces[] = " \t";
308 pvt->nwbuf = pvt->curval_data;
309 pvt->curval_data = NULL;
311 if ((cp = strpbrk(pvt->nwbuf, "#\n")) != NULL)
316 pvt->nwent.n_name = cp;
317 cp += strcspn(cp, spaces);
321 cp += strspn(cp, spaces);
324 pvt->nwent.n_addrtype = AF_INET;
325 t = cp + strcspn(cp, spaces);
328 pvt->nwent.n_length = inet_net_pton(AF_INET, cp,
329 pvt->addr, sizeof pvt->addr);
330 if (pvt->nwent.n_length < 0)
332 pvt->nwent.n_addr = pvt->addr;
336 ap = pvt->nwent.n_aliases = pvt->aliases;
338 if (ap >= &pvt->aliases[MAXALIASES])
341 cp += strcspn(cp, spaces);
345 cp += strspn(cp, spaces);
349 return (&pvt->nwent);
360 nisfree(struct pvt *pvt, enum do_what do_what) {
361 if ((do_what & do_key) && pvt->curkey_data) {
362 free(pvt->curkey_data);
363 pvt->curkey_data = NULL;
365 if ((do_what & do_val) && pvt->curval_data) {
366 free(pvt->curval_data);
367 pvt->curval_data = NULL;
372 init(struct irs_nw *this) {
373 struct pvt *pvt = (struct pvt *)this->private;
375 if (!pvt->res && !nw_res_get(this))
377 if (((pvt->res->options & RES_INIT) == 0) &&
378 res_ninit(pvt->res) == -1)
383 #endif /*WANT_IRS_NIS*/