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
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
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 /* Network lookup order if nsswitch.conf is broken or nonexistent */
50 static const ns_src default_src[] = {
51 { NSSRC_FILES, NS_SUCCESS },
52 { NSSRC_DNS, NS_SUCCESS },
56 NETDB_THREAD_ALLOC(netent_data)
57 NETDB_THREAD_ALLOC(netdata)
61 net_id_func(char *buffer, size_t *buffer_size, va_list ap, void *cache_mdata)
67 size_t desired_size, size;
68 enum nss_lookup_type lookup_type;
71 lookup_type = (enum nss_lookup_type)cache_mdata;
72 switch (lookup_type) {
74 name = va_arg(ap, char *);
77 desired_size = sizeof(enum nss_lookup_type) + size + 1;
78 if (desired_size > *buffer_size) {
83 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
84 memcpy(buffer + sizeof(enum nss_lookup_type), name, size + 1);
89 net = va_arg(ap, uint32_t);
90 type = va_arg(ap, int);
92 desired_size = sizeof(enum nss_lookup_type) +
93 sizeof(uint32_t) + sizeof(int);
94 if (desired_size > *buffer_size) {
99 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
100 memcpy(buffer + sizeof(enum nss_lookup_type), &net,
102 memcpy(buffer + sizeof(enum nss_lookup_type) + sizeof(uint32_t),
108 /* should be unreachable */
113 *buffer_size = desired_size;
119 net_marshal_func(char *buffer, size_t *buffer_size, void *retval, va_list ap,
127 size_t orig_buf_size;
129 struct netent new_ne;
130 size_t desired_size, size, aliases_size;
134 switch ((enum nss_lookup_type)cache_mdata) {
136 name = va_arg(ap, char *);
139 net = va_arg(ap, uint32_t);
140 type = va_arg(ap, int);
145 /* should be unreachable */
149 ne = va_arg(ap, struct netent *);
150 orig_buf = va_arg(ap, char *);
151 orig_buf_size = va_arg(ap, size_t);
153 desired_size = _ALIGNBYTES + sizeof(struct netent) + sizeof(char *);
154 if (ne->n_name != NULL)
155 desired_size += strlen(ne->n_name) + 1;
157 if (ne->n_aliases != NULL) {
159 for (alias = ne->n_aliases; *alias; ++alias) {
160 desired_size += strlen(*alias) + 1;
164 desired_size += _ALIGNBYTES +
165 (aliases_size + 1) * sizeof(char *);
168 if (*buffer_size < desired_size) {
169 /* this assignment is here for future use */
170 *buffer_size = desired_size;
174 memcpy(&new_ne, ne, sizeof(struct netent));
176 *buffer_size = desired_size;
177 memset(buffer, 0, desired_size);
178 p = buffer + sizeof(struct netent) + sizeof(char *);
179 memcpy(buffer + sizeof(struct netent), &p, sizeof(char *));
180 p = (char *)_ALIGN(p);
182 if (new_ne.n_name != NULL) {
183 size = strlen(new_ne.n_name);
184 memcpy(p, new_ne.n_name, size);
189 if (new_ne.n_aliases != NULL) {
190 p = (char *)_ALIGN(p);
191 memcpy(p, new_ne.n_aliases, sizeof(char *) * aliases_size);
192 new_ne.n_aliases = (char **)p;
193 p += sizeof(char *) * (aliases_size + 1);
195 for (alias = new_ne.n_aliases; *alias; ++alias) {
196 size = strlen(*alias);
197 memcpy(p, *alias, size);
203 memcpy(buffer, &new_ne, sizeof(struct netent));
208 net_unmarshal_func(char *buffer, size_t buffer_size, void *retval, va_list ap,
216 size_t orig_buf_size;
222 switch ((enum nss_lookup_type)cache_mdata) {
224 name = va_arg(ap, char *);
227 net = va_arg(ap, uint32_t);
228 type = va_arg(ap, int);
233 /* should be unreachable */
237 ne = va_arg(ap, struct netent *);
238 orig_buf = va_arg(ap, char *);
239 orig_buf_size = va_arg(ap, size_t);
240 ret_errno = va_arg(ap, int *);
243 buffer_size - sizeof(struct netent) - sizeof(char *)) {
248 memcpy(ne, buffer, sizeof(struct netent));
249 memcpy(&p, buffer + sizeof(struct netent), sizeof(char *));
251 orig_buf = (char *)_ALIGN(orig_buf);
252 memcpy(orig_buf, buffer + sizeof(struct netent) + sizeof(char *) +
253 _ALIGN(p) - (size_t)p,
254 buffer_size - sizeof(struct netent) - sizeof(char *) -
255 _ALIGN(p) + (size_t)p);
256 p = (char *)_ALIGN(p);
258 NS_APPLY_OFFSET(ne->n_name, orig_buf, p, char *);
259 if (ne->n_aliases != NULL) {
260 NS_APPLY_OFFSET(ne->n_aliases, orig_buf, p, char **);
262 for (alias = ne->n_aliases; *alias; ++alias)
263 NS_APPLY_OFFSET(*alias, orig_buf, p, char *);
267 *((struct netent **)retval) = ne;
271 #endif /* NS_CACHING */
274 netent_data_free(void *ptr)
276 struct netent_data *ned = ptr;
286 netdata_free(void *ptr)
292 __copy_netent(struct netent *ne, struct netent *nptr, char *buf, size_t buflen)
298 /* Find out the amount of space required to store the answer. */
299 numptr = 1; /* NULL ptr */
300 len = (char *)ALIGN(buf) - buf;
301 for (i = 0; ne->n_aliases[i]; i++, numptr++) {
302 len += strlen(ne->n_aliases[i]) + 1;
304 len += strlen(ne->n_name) + 1;
305 len += numptr * sizeof(char*);
307 if (len > (int)buflen) {
312 /* copy net value and type */
313 nptr->n_addrtype = ne->n_addrtype;
314 nptr->n_net = ne->n_net;
316 cp = (char *)ALIGN(buf) + numptr * sizeof(char *);
318 /* copy official name */
319 n = strlen(ne->n_name) + 1;
320 strcpy(cp, ne->n_name);
325 nptr->n_aliases = (char **)ALIGN(buf);
326 for (i = 0 ; ne->n_aliases[i]; i++) {
327 n = strlen(ne->n_aliases[i]) + 1;
328 strcpy(cp, ne->n_aliases[i]);
329 nptr->n_aliases[i] = cp;
332 nptr->n_aliases[i] = NULL;
338 getnetbyname_r(const char *name, struct netent *ne, char *buffer,
339 size_t buflen, struct netent **result, int *h_errorp)
342 static const nss_cache_info cache_info =
343 NS_COMMON_CACHE_INFO_INITIALIZER(
344 networks, (void *)nss_lt_name,
345 net_id_func, net_marshal_func, net_unmarshal_func);
347 static const ns_dtab dtab[] = {
348 NS_FILES_CB(_ht_getnetbyname, NULL)
349 { NSSRC_DNS, _dns_getnetbyname, NULL },
350 NS_NIS_CB(_nis_getnetbyname, NULL) /* force -DHESIOD */
352 NS_CACHE_CB(&cache_info)
356 int rval, ret_errno = 0;
358 rval = _nsdispatch((void *)result, dtab, NSDB_NETWORKS,
359 "getnetbyname_r", default_src, name, ne, buffer, buflen,
360 &ret_errno, h_errorp);
362 if (rval != NS_SUCCESS) {
364 return ((ret_errno != 0) ? ret_errno : -1);
370 getnetbyaddr_r(uint32_t addr, int af, struct netent *ne, char *buffer,
371 size_t buflen, struct netent **result, int *h_errorp)
374 static const nss_cache_info cache_info =
375 NS_COMMON_CACHE_INFO_INITIALIZER(
376 networks, (void *)nss_lt_id,
377 net_id_func, net_marshal_func, net_unmarshal_func);
379 static const ns_dtab dtab[] = {
380 NS_FILES_CB(_ht_getnetbyaddr, NULL)
381 { NSSRC_DNS, _dns_getnetbyaddr, NULL },
382 NS_NIS_CB(_nis_getnetbyaddr, NULL) /* force -DHESIOD */
384 NS_CACHE_CB(&cache_info)
388 int rval, ret_errno = 0;
390 rval = _nsdispatch((void *)result, dtab, NSDB_NETWORKS,
391 "getnetbyaddr_r", default_src, addr, af, ne, buffer, buflen,
392 &ret_errno, h_errorp);
394 if (rval != NS_SUCCESS) {
396 return ((ret_errno != 0) ? ret_errno : -1);
402 getnetbyname(const char *name)
408 if ((nd = __netdata_init()) == NULL)
410 if (getnetbyname_r(name, &nd->net, nd->data, sizeof(nd->data), &rval,
417 getnetbyaddr(uint32_t addr, int af)
423 if ((nd = __netdata_init()) == NULL)
425 if (getnetbyaddr_r(addr, af, &nd->net, nd->data, sizeof(nd->data),
426 &rval, &ret_h_errno) != 0)
432 setnetent(int stayopen)
434 struct netent_data *ned;
436 if ((ned = __netent_data_init()) == NULL)
438 _setnethtent(stayopen, ned);
439 _setnetdnsent(stayopen);
445 struct netent_data *ned;
447 if ((ned = __netent_data_init()) == NULL)