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_nss.h"
23 #include "nsswitch/libwbclient/wbclient.h"
27 #include <ns_daemon.h>
35 static pthread_mutex_t wins_nss_mutex = PTHREAD_MUTEX_INITIALIZER;
42 NSS_STATUS _nss_wins_gethostbyname_r(const char *hostname,
48 NSS_STATUS _nss_wins_gethostbyname2_r(const char *name,
56 static char *lookup_byname_backend(const char *name)
63 nbt_len = strlen(name);
64 if (nbt_len > MAX_NETBIOSNAME_LEN - 1) {
67 p = strchr(name, '.');
72 result = wbcResolveWinsByName(name, &ip);
73 if (result != WBC_ERR_SUCCESS) {
77 ipp = strchr(ip, '\t');
87 static char *lookup_byaddr_backend(const char *ip)
92 result = wbcResolveWinsByIP(ip, &name);
93 if (result != WBC_ERR_SUCCESS) {
106 nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
108 ok = nss_wins_init();
116 int lookup(nsd_file_t *rq)
121 int i, count, len, size;
125 nsd_logprintf(NSD_LOG_MIN, "entering lookup (wins)\n");
129 map = nsd_attr_fetch_string(rq->f_attrs, "table", (char*)0);
131 rq->f_status = NS_FATAL;
135 key = nsd_attr_fetch_string(rq->f_attrs, "key", (char*)0);
136 if (! key || ! *key) {
137 rq->f_status = NS_FATAL;
142 len = sizeof(response) - 2;
145 * response needs to be a string of the following format
146 * ip_address[ ip_address]*\tname[ alias]*
148 if (strcasecmp_m(map,"hosts.byaddr") == 0) {
151 name = lookup_byaddr_backend(key);
153 size = strlen(key) + 1;
158 strncat(response,key,size);
159 strncat(response,"\t",1);
161 size = strlen(name) + 1;
166 strncat(response, name, size);
167 strncat(response, " ", 1);
170 response[strlen(response)-1] = '\n';
171 } else if (strcasecmp_m(map,"hosts.byname") == 0) {
174 ip = lookup_byname_backend(key);
176 size = strlen(ip) + 1;
182 strncat(response,ip,size);
183 strncat(response,"\t",1);
184 size = strlen(key) + 1;
189 strncat(response,key,size);
190 strncat(response,"\n",1);
197 nsd_logprintf(NSD_LOG_LOW, "lookup (wins %s) %s\n",map,response);
198 nsd_set_result(rq,NS_SUCCESS,response,strlen(response),VOLATILE);
201 nsd_logprintf(NSD_LOG_LOW, "lookup (wins) not found\n");
202 rq->f_status = NS_NOTFOUND;
208 /* Allocate some space from the nss static buffer. The buffer and buflen
209 are the pointers passed in by the C library to the _nss_*_*
212 static char *get_static(char **buffer, size_t *buflen, size_t len)
216 /* Error check. We return false if things aren't set up right, or
217 there isn't enough buffer space left. */
219 if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
223 /* Return an index into the static buffer */
232 /****************************************************************************
233 gethostbyname() - we ignore any domain portion of the name and only
234 handle names that are at most 15 characters long
235 **************************************************************************/
237 _nss_wins_gethostbyname_r(const char *hostname,
244 NSS_STATUS nss_status = NSS_STATUS_SUCCESS;
253 pthread_mutex_lock(&wins_nss_mutex);
256 memset(he, '\0', sizeof(*he));
257 fstrcpy(name, hostname);
261 ip = lookup_byname_backend(name);
264 *h_errnop = NETDB_INTERNAL;
265 nss_status = NSS_STATUS_NOTFOUND;
269 rc = inet_pton(AF_INET, ip, &in);
273 *h_errnop = NETDB_INTERNAL;
274 nss_status = NSS_STATUS_TRYAGAIN;
280 namelen = strlen(name) + 1;
282 if ((he->h_name = get_static(&buffer, &buflen, namelen)) == NULL) {
284 *h_errnop = NETDB_INTERNAL;
285 nss_status = NSS_STATUS_TRYAGAIN;
289 memcpy(he->h_name, name, namelen);
291 /* Copy h_addr_list, align to pointer boundary first */
293 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
294 i = sizeof(char*) - i;
296 if (get_static(&buffer, &buflen, i) == NULL) {
298 *h_errnop = NETDB_INTERNAL;
299 nss_status = NSS_STATUS_TRYAGAIN;
303 if ((he->h_addr_list = (char **)get_static(
304 &buffer, &buflen, 2 * sizeof(char *))) == NULL) {
306 *h_errnop = NETDB_INTERNAL;
307 nss_status = NSS_STATUS_TRYAGAIN;
311 if ((he->h_addr_list[0] = get_static(&buffer, &buflen,
312 INADDRSZ)) == NULL) {
314 *h_errnop = NETDB_INTERNAL;
315 nss_status = NSS_STATUS_TRYAGAIN;
319 memcpy(he->h_addr_list[0], &in, INADDRSZ);
321 he->h_addr_list[1] = NULL;
323 /* Set h_addr_type and h_length */
325 he->h_addrtype = AF_INET;
326 he->h_length = INADDRSZ;
330 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
331 i = sizeof(char*) - i;
333 if (get_static(&buffer, &buflen, i) == NULL) {
335 *h_errnop = NETDB_INTERNAL;
336 nss_status = NSS_STATUS_TRYAGAIN;
340 if ((he->h_aliases = (char **)get_static(
341 &buffer, &buflen, sizeof(char *))) == NULL) {
343 *h_errnop = NETDB_INTERNAL;
344 nss_status = NSS_STATUS_TRYAGAIN;
348 he->h_aliases[0] = NULL;
350 *h_errnop = NETDB_SUCCESS;
351 nss_status = NSS_STATUS_SUCCESS;
356 pthread_mutex_unlock(&wins_nss_mutex);
363 _nss_wins_gethostbyname2_r(const char *name,
371 NSS_STATUS nss_status;
374 *errnop = EAFNOSUPPORT;
376 nss_status = NSS_STATUS_UNAVAIL;
378 nss_status = _nss_wins_gethostbyname_r(name,