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"
26 #include <ns_daemon.h>
34 static pthread_mutex_t wins_nss_mutex = PTHREAD_MUTEX_INITIALIZER;
41 static int initialised;
43 NSS_STATUS _nss_wins_gethostbyname_r(const char *hostname, struct hostent *he,
44 char *buffer, size_t buflen, int *h_errnop);
45 NSS_STATUS _nss_wins_gethostbyname2_r(const char *name, int af, struct hostent *he,
46 char *buffer, size_t buflen, int *h_errnop);
48 static void nss_wins_init(void)
51 load_case_tables_library();
52 lp_set_cmdline("log level", "0");
55 setup_logging("nss_wins",False);
56 lp_load(get_dyn_CONFIGFILE(),True,False,False,True);
60 static struct in_addr *lookup_byname_backend(const char *name, int *count)
62 TALLOC_CTX *frame = talloc_stackframe();
63 struct ip_service *address = NULL;
64 struct in_addr *ret = NULL;
73 /* always try with wins first */
74 if (NT_STATUS_IS_OK(resolve_wins(name,0x00,&address,count))) {
75 if ( (ret = SMB_MALLOC_P(struct in_addr)) == NULL ) {
80 if (address[0].ss.ss_family != AF_INET) {
86 *ret = ((struct sockaddr_in *)(void *)&address[0].ss)
93 /* uggh, we have to broadcast to each interface in turn */
94 for (j=iface_count() - 1;j >= 0;j--) {
95 const struct in_addr *bcast = iface_n_bcast_v4(j);
96 struct sockaddr_storage ss;
97 struct sockaddr_storage *pss;
103 in_addr_to_sockaddr_storage(&ss, *bcast);
104 status = name_query(name, 0x00, True, True, &ss,
105 talloc_tos(), &pss, count, NULL);
106 if (NT_STATUS_IS_OK(status) && (*count > 0)) {
107 if ((ret = SMB_MALLOC_P(struct in_addr)) == NULL) {
111 *ret = ((struct sockaddr_in *)pss)->sin_addr;
121 static struct node_status *lookup_byaddr_backend(char *addr, int *count)
123 struct sockaddr_storage ss;
124 struct nmb_name nname;
125 struct node_status *result;
132 make_nmb_name(&nname, "*", 0);
133 if (!interpret_string_addr(&ss, addr, AI_NUMERICHOST)) {
136 status = node_status_query(NULL, &nname, &ss, &result, count, NULL);
137 if (!NT_STATUS_IS_OK(status)) {
148 nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
153 int lookup(nsd_file_t *rq)
158 struct in_addr *ip_list;
159 struct node_status *status;
160 int i, count, len, size;
164 nsd_logprintf(NSD_LOG_MIN, "entering lookup (wins)\n");
168 map = nsd_attr_fetch_string(rq->f_attrs, "table", (char*)0);
170 rq->f_status = NS_FATAL;
174 key = nsd_attr_fetch_string(rq->f_attrs, "key", (char*)0);
175 if (! key || ! *key) {
176 rq->f_status = NS_FATAL;
181 len = sizeof(response) - 2;
184 * response needs to be a string of the following format
185 * ip_address[ ip_address]*\tname[ alias]*
187 if (strcasecmp_m(map,"hosts.byaddr") == 0) {
188 if ( status = lookup_byaddr_backend(key, &count)) {
189 size = strlen(key) + 1;
195 strncat(response,key,size);
196 strncat(response,"\t",1);
197 for (i = 0; i < count; i++) {
198 /* ignore group names */
199 if (status[i].flags & 0x80) continue;
200 if (status[i].type == 0x20) {
201 size = sizeof(status[i].name) + 1;
207 strncat(response, status[i].name, size);
208 strncat(response, " ", 1);
212 response[strlen(response)-1] = '\n';
215 } else if (strcasecmp_m(map,"hosts.byname") == 0) {
216 if (ip_list = lookup_byname_backend(key, &count)) {
217 for (i = count; i ; i--) {
218 addr = inet_ntoa(ip_list[i-1]);
219 size = strlen(addr) + 1;
226 response[strlen(response)-1] = ' ';
227 strncat(response,addr,size);
228 strncat(response,"\t",1);
230 size = strlen(key) + 1;
235 strncat(response,key,size);
236 strncat(response,"\n",1);
243 nsd_logprintf(NSD_LOG_LOW, "lookup (wins %s) %s\n",map,response);
244 nsd_set_result(rq,NS_SUCCESS,response,strlen(response),VOLATILE);
247 nsd_logprintf(NSD_LOG_LOW, "lookup (wins) not found\n");
248 rq->f_status = NS_NOTFOUND;
254 /* Allocate some space from the nss static buffer. The buffer and buflen
255 are the pointers passed in by the C library to the _nss_*_*
258 static char *get_static(char **buffer, size_t *buflen, int len)
262 /* Error check. We return false if things aren't set up right, or
263 there isn't enough buffer space left. */
265 if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
269 /* Return an index into the static buffer */
278 /****************************************************************************
279 gethostbyname() - we ignore any domain portion of the name and only
280 handle names that are at most 15 characters long
281 **************************************************************************/
283 _nss_wins_gethostbyname_r(const char *hostname, struct hostent *he,
284 char *buffer, size_t buflen, int *h_errnop)
286 NSS_STATUS nss_status = NSS_STATUS_SUCCESS;
287 struct in_addr *ip_list;
294 pthread_mutex_lock(&wins_nss_mutex);
297 frame = talloc_stackframe();
299 memset(he, '\0', sizeof(*he));
300 fstrcpy(name, hostname);
304 ip_list = lookup_byname_backend(name, &count);
307 nss_status = NSS_STATUS_NOTFOUND;
313 namelen = strlen(name) + 1;
315 if ((he->h_name = get_static(&buffer, &buflen, namelen)) == NULL) {
317 nss_status = NSS_STATUS_TRYAGAIN;
321 memcpy(he->h_name, name, namelen);
323 /* Copy h_addr_list, align to pointer boundary first */
325 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
326 i = sizeof(char*) - i;
328 if (get_static(&buffer, &buflen, i) == NULL) {
330 nss_status = NSS_STATUS_TRYAGAIN;
334 if ((he->h_addr_list = (char **)get_static(
335 &buffer, &buflen, (count + 1) * sizeof(char *))) == NULL) {
337 nss_status = NSS_STATUS_TRYAGAIN;
341 for (i = 0; i < count; i++) {
342 if ((he->h_addr_list[i] = get_static(&buffer, &buflen,
343 INADDRSZ)) == NULL) {
345 nss_status = NSS_STATUS_TRYAGAIN;
348 memcpy(he->h_addr_list[i], &ip_list[i], INADDRSZ);
351 he->h_addr_list[count] = NULL;
355 /* Set h_addr_type and h_length */
357 he->h_addrtype = AF_INET;
358 he->h_length = INADDRSZ;
362 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
363 i = sizeof(char*) - i;
365 if (get_static(&buffer, &buflen, i) == NULL) {
366 nss_status = NSS_STATUS_TRYAGAIN;
370 if ((he->h_aliases = (char **)get_static(
371 &buffer, &buflen, sizeof(char *))) == NULL) {
372 nss_status = NSS_STATUS_TRYAGAIN;
376 he->h_aliases[0] = NULL;
378 nss_status = NSS_STATUS_SUCCESS;
385 pthread_mutex_unlock(&wins_nss_mutex);
392 _nss_wins_gethostbyname2_r(const char *name, int af, struct hostent *he,
393 char *buffer, size_t buflen, int *h_errnop)
395 NSS_STATUS nss_status;
399 nss_status = NSS_STATUS_UNAVAIL;
401 nss_status = _nss_wins_gethostbyname_r(
402 name, he, buffer, buflen, h_errnop);