2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1999
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "nsswitch/winbind_client.h"
23 #include "nsswitch/libwbclient/wbclient.h"
24 #include "lib/util/string_wrappers.h"
28 #include <ns_daemon.h>
36 static pthread_mutex_t wins_nss_mutex = PTHREAD_MUTEX_INITIALIZER;
43 #ifndef NETDB_INTERNAL
44 #define NETDB_INTERNAL -1
48 #define NETDB_SUCCESS 0
52 NSS_STATUS _nss_wins_gethostbyname_r(const char *hostname,
58 NSS_STATUS _nss_wins_gethostbyname2_r(const char *name,
66 static char *lookup_byname_backend(const char *name)
73 nbt_len = strlen(name);
74 if (nbt_len > MAX_NETBIOSNAME_LEN - 1) {
77 p = strchr(name, '.');
82 wbcSetClientProcessName("nss_wins");
83 result = wbcResolveWinsByName(name, &ip);
84 if (result != WBC_ERR_SUCCESS) {
88 ipp = strchr(ip, '\t');
98 static char *lookup_byaddr_backend(const char *ip)
103 wbcSetClientProcessName("nss_wins");
104 result = wbcResolveWinsByIP(ip, &name);
105 if (result != WBC_ERR_SUCCESS) {
118 nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
120 ok = nss_wins_init();
128 int lookup(nsd_file_t *rq)
133 int i, count, len, size;
137 nsd_logprintf(NSD_LOG_MIN, "entering lookup (wins)\n");
141 map = nsd_attr_fetch_string(rq->f_attrs, "table", (char*)0);
143 rq->f_status = NS_FATAL;
147 key = nsd_attr_fetch_string(rq->f_attrs, "key", (char*)0);
148 if (! key || ! *key) {
149 rq->f_status = NS_FATAL;
154 len = sizeof(response) - 2;
157 * response needs to be a string of the following format
158 * ip_address[ ip_address]*\tname[ alias]*
160 if (strcasecmp_m(map,"hosts.byaddr") == 0) {
163 name = lookup_byaddr_backend(key);
165 size = strlen(key) + 1;
170 strncat(response,key,size);
171 strncat(response,"\t",1);
173 size = strlen(name) + 1;
178 strncat(response, name, size);
179 strncat(response, " ", 1);
182 response[strlen(response)-1] = '\n';
183 } else if (strcasecmp_m(map,"hosts.byname") == 0) {
186 ip = lookup_byname_backend(key);
188 size = strlen(ip) + 1;
194 strncat(response,ip,size);
195 strncat(response,"\t",1);
196 size = strlen(key) + 1;
201 strncat(response,key,size);
202 strncat(response,"\n",1);
209 nsd_logprintf(NSD_LOG_LOW, "lookup (wins %s) %s\n",map,response);
210 nsd_set_result(rq,NS_SUCCESS,response,strlen(response),VOLATILE);
213 nsd_logprintf(NSD_LOG_LOW, "lookup (wins) not found\n");
214 rq->f_status = NS_NOTFOUND;
220 /* Allocate some space from the nss static buffer. The buffer and buflen
221 are the pointers passed in by the C library to the _nss_*_*
224 static char *get_static(char **buffer, size_t *buflen, size_t len)
228 /* Error check. We return false if things aren't set up right, or
229 there isn't enough buffer space left. */
231 if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
235 /* Return an index into the static buffer */
244 /****************************************************************************
245 gethostbyname() - we ignore any domain portion of the name and only
246 handle names that are at most 15 characters long
247 **************************************************************************/
250 _nss_wins_gethostbyname_r(const char *hostname,
257 NSS_STATUS nss_status = NSS_STATUS_SUCCESS;
266 pthread_mutex_lock(&wins_nss_mutex);
269 memset(he, '\0', sizeof(*he));
270 fstrcpy(name, hostname);
274 ip = lookup_byname_backend(name);
276 *h_errnop = HOST_NOT_FOUND;
277 nss_status = NSS_STATUS_NOTFOUND;
281 rc = inet_pton(AF_INET, ip, &in);
285 *h_errnop = NETDB_INTERNAL;
286 nss_status = NSS_STATUS_TRYAGAIN;
292 namelen = strlen(name) + 1;
294 if ((he->h_name = get_static(&buffer, &buflen, namelen)) == NULL) {
296 *h_errnop = NETDB_INTERNAL;
297 nss_status = NSS_STATUS_TRYAGAIN;
301 memcpy(he->h_name, name, namelen);
303 /* Copy h_addr_list, align to pointer boundary first */
305 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
306 i = sizeof(char*) - i;
308 if (get_static(&buffer, &buflen, i) == NULL) {
310 *h_errnop = NETDB_INTERNAL;
311 nss_status = NSS_STATUS_TRYAGAIN;
315 if ((he->h_addr_list = (char **)get_static(
316 &buffer, &buflen, 2 * sizeof(char *))) == NULL) {
318 *h_errnop = NETDB_INTERNAL;
319 nss_status = NSS_STATUS_TRYAGAIN;
323 if ((he->h_addr_list[0] = get_static(&buffer, &buflen,
324 INADDRSZ)) == NULL) {
326 *h_errnop = NETDB_INTERNAL;
327 nss_status = NSS_STATUS_TRYAGAIN;
331 memcpy(he->h_addr_list[0], &in, INADDRSZ);
333 he->h_addr_list[1] = NULL;
335 /* Set h_addr_type and h_length */
337 he->h_addrtype = AF_INET;
338 he->h_length = INADDRSZ;
342 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
343 i = sizeof(char*) - i;
345 if (get_static(&buffer, &buflen, i) == NULL) {
347 *h_errnop = NETDB_INTERNAL;
348 nss_status = NSS_STATUS_TRYAGAIN;
352 if ((he->h_aliases = (char **)get_static(
353 &buffer, &buflen, sizeof(char *))) == NULL) {
355 *h_errnop = NETDB_INTERNAL;
356 nss_status = NSS_STATUS_TRYAGAIN;
360 he->h_aliases[0] = NULL;
362 *h_errnop = NETDB_SUCCESS;
363 nss_status = NSS_STATUS_SUCCESS;
368 pthread_mutex_unlock(&wins_nss_mutex);
376 _nss_wins_gethostbyname2_r(const char *name,
384 NSS_STATUS nss_status;
387 *errnop = EAFNOSUPPORT;
389 nss_status = NSS_STATUS_UNAVAIL;
391 nss_status = _nss_wins_gethostbyname_r(name,