2 * Copyright (c) 1994, Garrett Wollman
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * $FreeBSD: src/lib/libc/net/getnetnamadr.c,v 1.23 2006/04/28 12:03:35 ume Exp $
26 * $DragonFly: src/lib/libc/net/getnetnamadr.c,v 1.4 2005/11/13 02:04:47 swildner Exp $
29 #include "namespace.h"
30 #include "reentrant.h"
31 #include <sys/param.h>
32 #include <sys/socket.h>
33 #include <netinet/in.h>
34 #include <arpa/inet.h>
43 #include "un-namespace.h"
44 #include "netdb_private.h"
49 extern int _ht_getnetbyname(void *, void *, va_list);
50 extern int _dns_getnetbyname(void *, void *, va_list);
51 extern int _nis_getnetbyname(void *, void *, va_list);
52 extern int _ht_getnetbyaddr(void *, void *, va_list);
53 extern int _dns_getnetbyaddr(void *, void *, va_list);
54 extern int _nis_getnetbyaddr(void *, void *, va_list);
56 /* Network lookup order if nsswitch.conf is broken or nonexistant */
57 static const ns_src default_src[] = {
58 { NSSRC_FILES, NS_SUCCESS },
59 { NSSRC_DNS, NS_SUCCESS },
63 NETDB_THREAD_ALLOC(netent_data)
64 NETDB_THREAD_ALLOC(netdata)
68 net_id_func(char *buffer, size_t *buffer_size, va_list ap, void *cache_mdata)
74 size_t desired_size, size;
75 enum nss_lookup_type lookup_type;
78 lookup_type = (enum nss_lookup_type)cache_mdata;
79 switch (lookup_type) {
81 name = va_arg(ap, char *);
84 desired_size = sizeof(enum nss_lookup_type) + size + 1;
85 if (desired_size > *buffer_size) {
90 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
91 memcpy(buffer + sizeof(enum nss_lookup_type), name, size + 1);
96 net = va_arg(ap, uint32_t);
97 type = va_arg(ap, int);
99 desired_size = sizeof(enum nss_lookup_type) +
100 sizeof(uint32_t) + sizeof(int);
101 if (desired_size > *buffer_size) {
106 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
107 memcpy(buffer + sizeof(enum nss_lookup_type), &net,
109 memcpy(buffer + sizeof(enum nss_lookup_type) + sizeof(uint32_t),
115 /* should be unreachable */
120 *buffer_size = desired_size;
126 net_marshal_func(char *buffer, size_t *buffer_size, void *retval, va_list ap,
134 size_t orig_buf_size;
136 struct netent new_ne;
137 size_t desired_size, size, aliases_size;
141 switch ((enum nss_lookup_type)cache_mdata) {
143 name = va_arg(ap, char *);
146 net = va_arg(ap, uint32_t);
147 type = va_arg(ap, int);
152 /* should be unreachable */
156 ne = va_arg(ap, struct netent *);
157 orig_buf = va_arg(ap, char *);
158 orig_buf_size = va_arg(ap, size_t);
160 desired_size = _ALIGNBYTES + sizeof(struct netent) + sizeof(char *);
161 if (ne->n_name != NULL)
162 desired_size += strlen(ne->n_name) + 1;
164 if (ne->n_aliases != NULL) {
166 for (alias = ne->n_aliases; *alias; ++alias) {
167 desired_size += strlen(*alias) + 1;
171 desired_size += _ALIGNBYTES +
172 (aliases_size + 1) * sizeof(char *);
175 if (*buffer_size < desired_size) {
176 /* this assignment is here for future use */
177 *buffer_size = desired_size;
181 memcpy(&new_ne, ne, sizeof(struct netent));
183 *buffer_size = desired_size;
184 memset(buffer, 0, desired_size);
185 p = buffer + sizeof(struct netent) + sizeof(char *);
186 memcpy(buffer + sizeof(struct netent), &p, sizeof(char *));
187 p = (char *)_ALIGN(p);
189 if (new_ne.n_name != NULL) {
190 size = strlen(new_ne.n_name);
191 memcpy(p, new_ne.n_name, size);
196 if (new_ne.n_aliases != NULL) {
197 p = (char *)_ALIGN(p);
198 memcpy(p, new_ne.n_aliases, sizeof(char *) * aliases_size);
199 new_ne.n_aliases = (char **)p;
200 p += sizeof(char *) * (aliases_size + 1);
202 for (alias = new_ne.n_aliases; *alias; ++alias) {
203 size = strlen(*alias);
204 memcpy(p, *alias, size);
210 memcpy(buffer, &new_ne, sizeof(struct netent));
215 net_unmarshal_func(char *buffer, size_t buffer_size, void *retval, va_list ap,
223 size_t orig_buf_size;
229 switch ((enum nss_lookup_type)cache_mdata) {
231 name = va_arg(ap, char *);
234 net = va_arg(ap, uint32_t);
235 type = va_arg(ap, int);
240 /* should be unreachable */
244 ne = va_arg(ap, struct netent *);
245 orig_buf = va_arg(ap, char *);
246 orig_buf_size = va_arg(ap, size_t);
247 ret_errno = va_arg(ap, int *);
250 buffer_size - sizeof(struct netent) - sizeof(char *)) {
255 memcpy(ne, buffer, sizeof(struct netent));
256 memcpy(&p, buffer + sizeof(struct netent), sizeof(char *));
258 orig_buf = (char *)_ALIGN(orig_buf);
259 memcpy(orig_buf, buffer + sizeof(struct netent) + sizeof(char *) +
260 _ALIGN(p) - (size_t)p,
261 buffer_size - sizeof(struct netent) - sizeof(char *) -
262 _ALIGN(p) + (size_t)p);
263 p = (char *)_ALIGN(p);
265 NS_APPLY_OFFSET(ne->n_name, orig_buf, p, char *);
266 if (ne->n_aliases != NULL) {
267 NS_APPLY_OFFSET(ne->n_aliases, orig_buf, p, char **);
269 for (alias = ne->n_aliases; *alias; ++alias)
270 NS_APPLY_OFFSET(*alias, orig_buf, p, char *);
274 *((struct netent **)retval) = ne;
278 #endif /* NS_CACHING */
281 netent_data_free(void *ptr)
283 struct netent_data *ned = ptr;
293 netdata_free(void *ptr)
299 __copy_netent(struct netent *ne, struct netent *nptr, char *buf, size_t buflen)
305 /* Find out the amount of space required to store the answer. */
306 numptr = 1; /* NULL ptr */
307 len = (char *)ALIGN(buf) - buf;
308 for (i = 0; ne->n_aliases[i]; i++, numptr++) {
309 len += strlen(ne->n_aliases[i]) + 1;
311 len += strlen(ne->n_name) + 1;
312 len += numptr * sizeof(char*);
314 if (len > (int)buflen) {
319 /* copy net value and type */
320 nptr->n_addrtype = ne->n_addrtype;
321 nptr->n_net = ne->n_net;
323 cp = (char *)ALIGN(buf) + numptr * sizeof(char *);
325 /* copy official name */
326 n = strlen(ne->n_name) + 1;
327 strcpy(cp, ne->n_name);
332 nptr->n_aliases = (char **)ALIGN(buf);
333 for (i = 0 ; ne->n_aliases[i]; i++) {
334 n = strlen(ne->n_aliases[i]) + 1;
335 strcpy(cp, ne->n_aliases[i]);
336 nptr->n_aliases[i] = cp;
339 nptr->n_aliases[i] = NULL;
345 getnetbyname_r(const char *name, struct netent *ne, char *buffer,
346 size_t buflen, struct netent **result, int *h_errorp)
349 static const nss_cache_info cache_info =
350 NS_COMMON_CACHE_INFO_INITIALIZER(
351 networks, (void *)nss_lt_name,
352 net_id_func, net_marshal_func, net_unmarshal_func);
354 static const ns_dtab dtab[] = {
355 NS_FILES_CB(_ht_getnetbyname, NULL)
356 { NSSRC_DNS, _dns_getnetbyname, NULL },
357 NS_NIS_CB(_nis_getnetbyname, NULL) /* force -DHESIOD */
359 NS_CACHE_CB(&cache_info)
365 rval = _nsdispatch((void *)result, dtab, NSDB_NETWORKS,
366 "getnetbyname_r", default_src, name, ne, buffer, buflen,
367 &ret_errno, h_errorp);
369 return ((rval == NS_SUCCESS) ? 0 : -1);
373 getnetbyaddr_r(uint32_t addr, int af, struct netent *ne, char *buffer,
374 size_t buflen, struct netent **result, int *h_errorp)
377 static const nss_cache_info cache_info =
378 NS_COMMON_CACHE_INFO_INITIALIZER(
379 networks, (void *)nss_lt_id,
380 net_id_func, net_marshal_func, net_unmarshal_func);
382 static const ns_dtab dtab[] = {
383 NS_FILES_CB(_ht_getnetbyaddr, NULL)
384 { NSSRC_DNS, _dns_getnetbyaddr, NULL },
385 NS_NIS_CB(_nis_getnetbyaddr, NULL) /* force -DHESIOD */
387 NS_CACHE_CB(&cache_info)
393 rval = _nsdispatch((void *)result, dtab, NSDB_NETWORKS,
394 "getnetbyaddr_r", default_src, addr, af, ne, buffer, buflen,
395 &ret_errno, h_errorp);
397 return ((rval == NS_SUCCESS) ? 0 : -1);
401 getnetbyname(const char *name)
407 if ((nd = __netdata_init()) == NULL)
409 if (getnetbyname_r(name, &nd->net, nd->data, sizeof(nd->data), &rval,
416 getnetbyaddr(uint32_t addr, int af)
422 if ((nd = __netdata_init()) == NULL)
424 if (getnetbyaddr_r(addr, af, &nd->net, nd->data, sizeof(nd->data),
425 &rval, &ret_h_errno) != 0)
431 setnetent(int stayopen)
433 struct netent_data *ned;
435 if ((ned = __netent_data_init()) == NULL)
437 _setnethtent(stayopen, ned);
438 _setnetdnsent(stayopen);
444 struct netent_data *ned;
446 if ((ned = __netent_data_init()) == NULL)