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 sockaddr_storage *address = NULL;
64 struct in_addr *ret = NULL;
74 /* always try with wins first */
75 status = resolve_wins(name, 0x00, talloc_tos(),
77 if (NT_STATUS_IS_OK(status)) {
78 if ( (ret = SMB_MALLOC_P(struct in_addr)) == NULL ) {
82 if (address[0].ss_family != AF_INET) {
87 *ret = ((struct sockaddr_in *)(void *)address)
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;
102 in_addr_to_sockaddr_storage(&ss, *bcast);
103 status = name_query(name, 0x00, True, True, &ss,
104 talloc_tos(), &pss, count, NULL);
105 if (NT_STATUS_IS_OK(status) && (*count > 0)) {
106 if ((ret = SMB_MALLOC_P(struct in_addr)) == NULL) {
110 *ret = ((struct sockaddr_in *)pss)->sin_addr;
120 static struct node_status *lookup_byaddr_backend(char *addr, int *count)
122 struct sockaddr_storage ss;
123 struct nmb_name nname;
124 struct node_status *result;
131 make_nmb_name(&nname, "*", 0);
132 if (!interpret_string_addr(&ss, addr, AI_NUMERICHOST)) {
135 status = node_status_query(NULL, &nname, &ss, &result, count, NULL);
136 if (!NT_STATUS_IS_OK(status)) {
147 nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
152 int lookup(nsd_file_t *rq)
157 struct in_addr *ip_list;
158 struct node_status *status;
159 int i, count, len, size;
163 nsd_logprintf(NSD_LOG_MIN, "entering lookup (wins)\n");
167 map = nsd_attr_fetch_string(rq->f_attrs, "table", (char*)0);
169 rq->f_status = NS_FATAL;
173 key = nsd_attr_fetch_string(rq->f_attrs, "key", (char*)0);
174 if (! key || ! *key) {
175 rq->f_status = NS_FATAL;
180 len = sizeof(response) - 2;
183 * response needs to be a string of the following format
184 * ip_address[ ip_address]*\tname[ alias]*
186 if (strcasecmp_m(map,"hosts.byaddr") == 0) {
187 if ( status = lookup_byaddr_backend(key, &count)) {
188 size = strlen(key) + 1;
194 strncat(response,key,size);
195 strncat(response,"\t",1);
196 for (i = 0; i < count; i++) {
197 /* ignore group names */
198 if (status[i].flags & 0x80) continue;
199 if (status[i].type == 0x20) {
200 size = sizeof(status[i].name) + 1;
206 strncat(response, status[i].name, size);
207 strncat(response, " ", 1);
211 response[strlen(response)-1] = '\n';
214 } else if (strcasecmp_m(map,"hosts.byname") == 0) {
215 if (ip_list = lookup_byname_backend(key, &count)) {
216 for (i = count; i ; i--) {
217 addr = inet_ntoa(ip_list[i-1]);
218 size = strlen(addr) + 1;
225 response[strlen(response)-1] = ' ';
226 strncat(response,addr,size);
227 strncat(response,"\t",1);
229 size = strlen(key) + 1;
234 strncat(response,key,size);
235 strncat(response,"\n",1);
242 nsd_logprintf(NSD_LOG_LOW, "lookup (wins %s) %s\n",map,response);
243 nsd_set_result(rq,NS_SUCCESS,response,strlen(response),VOLATILE);
246 nsd_logprintf(NSD_LOG_LOW, "lookup (wins) not found\n");
247 rq->f_status = NS_NOTFOUND;
253 /* Allocate some space from the nss static buffer. The buffer and buflen
254 are the pointers passed in by the C library to the _nss_*_*
257 static char *get_static(char **buffer, size_t *buflen, int len)
261 /* Error check. We return false if things aren't set up right, or
262 there isn't enough buffer space left. */
264 if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
268 /* Return an index into the static buffer */
277 /****************************************************************************
278 gethostbyname() - we ignore any domain portion of the name and only
279 handle names that are at most 15 characters long
280 **************************************************************************/
282 _nss_wins_gethostbyname_r(const char *hostname, struct hostent *he,
283 char *buffer, size_t buflen, int *h_errnop)
285 NSS_STATUS nss_status = NSS_STATUS_SUCCESS;
286 struct in_addr *ip_list;
293 pthread_mutex_lock(&wins_nss_mutex);
296 frame = talloc_stackframe();
298 memset(he, '\0', sizeof(*he));
299 fstrcpy(name, hostname);
303 ip_list = lookup_byname_backend(name, &count);
306 nss_status = NSS_STATUS_NOTFOUND;
312 namelen = strlen(name) + 1;
314 if ((he->h_name = get_static(&buffer, &buflen, namelen)) == NULL) {
316 nss_status = NSS_STATUS_TRYAGAIN;
320 memcpy(he->h_name, name, namelen);
322 /* Copy h_addr_list, align to pointer boundary first */
324 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
325 i = sizeof(char*) - i;
327 if (get_static(&buffer, &buflen, i) == NULL) {
329 nss_status = NSS_STATUS_TRYAGAIN;
333 if ((he->h_addr_list = (char **)get_static(
334 &buffer, &buflen, (count + 1) * sizeof(char *))) == NULL) {
336 nss_status = NSS_STATUS_TRYAGAIN;
340 for (i = 0; i < count; i++) {
341 if ((he->h_addr_list[i] = get_static(&buffer, &buflen,
342 INADDRSZ)) == NULL) {
344 nss_status = NSS_STATUS_TRYAGAIN;
347 memcpy(he->h_addr_list[i], &ip_list[i], INADDRSZ);
350 he->h_addr_list[count] = NULL;
354 /* Set h_addr_type and h_length */
356 he->h_addrtype = AF_INET;
357 he->h_length = INADDRSZ;
361 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
362 i = sizeof(char*) - i;
364 if (get_static(&buffer, &buflen, i) == NULL) {
365 nss_status = NSS_STATUS_TRYAGAIN;
369 if ((he->h_aliases = (char **)get_static(
370 &buffer, &buflen, sizeof(char *))) == NULL) {
371 nss_status = NSS_STATUS_TRYAGAIN;
375 he->h_aliases[0] = NULL;
377 nss_status = NSS_STATUS_SUCCESS;
384 pthread_mutex_unlock(&wins_nss_mutex);
391 _nss_wins_gethostbyname2_r(const char *name, int af, struct hostent *he,
392 char *buffer, size_t buflen, int *h_errnop)
394 NSS_STATUS nss_status;
398 nss_status = NSS_STATUS_UNAVAIL;
400 nss_status = _nss_wins_gethostbyname_r(
401 name, he, buffer, buflen, h_errnop);