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 lp_set_cmdline("log level", "0");
54 setup_logging("nss_wins",False);
55 lp_load_global(get_dyn_CONFIGFILE());
59 static struct in_addr *lookup_byname_backend(const char *name, int *count)
62 struct sockaddr_storage *address = NULL;
63 struct in_addr *ret = NULL;
75 nbt_len = strlen(name);
76 if (nbt_len > MAX_NETBIOSNAME_LEN - 1) {
79 p = strchr(name, '.');
84 frame = talloc_stackframe();
85 /* always try with wins first */
86 status = resolve_wins(name, 0x00, talloc_tos(),
88 if (NT_STATUS_IS_OK(status)) {
89 if ( (ret = SMB_MALLOC_P(struct in_addr)) == NULL ) {
93 if (address[0].ss_family != AF_INET) {
98 *ret = ((struct sockaddr_in *)(void *)address)
104 /* uggh, we have to broadcast to each interface in turn */
105 for (j=iface_count() - 1;j >= 0;j--) {
106 const struct in_addr *bcast = iface_n_bcast_v4(j);
107 struct sockaddr_storage ss;
108 struct sockaddr_storage *pss;
113 in_addr_to_sockaddr_storage(&ss, *bcast);
114 status = name_query(name, 0x00, True, True, &ss,
115 talloc_tos(), &pss, count, NULL);
116 if (NT_STATUS_IS_OK(status) && (*count > 0)) {
117 if ((ret = SMB_MALLOC_P(struct in_addr)) == NULL) {
121 *ret = ((struct sockaddr_in *)pss)->sin_addr;
131 static struct node_status *lookup_byaddr_backend(char *addr, int *count)
133 struct sockaddr_storage ss;
134 struct nmb_name nname;
135 struct node_status *result;
142 make_nmb_name(&nname, "*", 0);
143 if (!interpret_string_addr(&ss, addr, AI_NUMERICHOST)) {
146 status = node_status_query(NULL, &nname, &ss, &result, count, NULL);
147 if (!NT_STATUS_IS_OK(status)) {
158 nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
163 int lookup(nsd_file_t *rq)
168 struct in_addr *ip_list;
169 struct node_status *status;
170 int i, count, len, size;
174 nsd_logprintf(NSD_LOG_MIN, "entering lookup (wins)\n");
178 map = nsd_attr_fetch_string(rq->f_attrs, "table", (char*)0);
180 rq->f_status = NS_FATAL;
184 key = nsd_attr_fetch_string(rq->f_attrs, "key", (char*)0);
185 if (! key || ! *key) {
186 rq->f_status = NS_FATAL;
191 len = sizeof(response) - 2;
194 * response needs to be a string of the following format
195 * ip_address[ ip_address]*\tname[ alias]*
197 if (strcasecmp_m(map,"hosts.byaddr") == 0) {
198 if ( status = lookup_byaddr_backend(key, &count)) {
199 size = strlen(key) + 1;
205 strncat(response,key,size);
206 strncat(response,"\t",1);
207 for (i = 0; i < count; i++) {
208 /* ignore group names */
209 if (status[i].flags & 0x80) continue;
210 if (status[i].type == 0x20) {
211 size = sizeof(status[i].name) + 1;
217 strncat(response, status[i].name, size);
218 strncat(response, " ", 1);
222 response[strlen(response)-1] = '\n';
225 } else if (strcasecmp_m(map,"hosts.byname") == 0) {
226 if (ip_list = lookup_byname_backend(key, &count)) {
227 for (i = count; i ; i--) {
228 addr = inet_ntoa(ip_list[i-1]);
229 size = strlen(addr) + 1;
236 response[strlen(response)-1] = ' ';
237 strncat(response,addr,size);
238 strncat(response,"\t",1);
240 size = strlen(key) + 1;
245 strncat(response,key,size);
246 strncat(response,"\n",1);
253 nsd_logprintf(NSD_LOG_LOW, "lookup (wins %s) %s\n",map,response);
254 nsd_set_result(rq,NS_SUCCESS,response,strlen(response),VOLATILE);
257 nsd_logprintf(NSD_LOG_LOW, "lookup (wins) not found\n");
258 rq->f_status = NS_NOTFOUND;
264 /* Allocate some space from the nss static buffer. The buffer and buflen
265 are the pointers passed in by the C library to the _nss_*_*
268 static char *get_static(char **buffer, size_t *buflen, int len)
272 /* Error check. We return false if things aren't set up right, or
273 there isn't enough buffer space left. */
275 if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
279 /* Return an index into the static buffer */
288 /****************************************************************************
289 gethostbyname() - we ignore any domain portion of the name and only
290 handle names that are at most 15 characters long
291 **************************************************************************/
293 _nss_wins_gethostbyname_r(const char *hostname, struct hostent *he,
294 char *buffer, size_t buflen, int *h_errnop)
296 NSS_STATUS nss_status = NSS_STATUS_SUCCESS;
297 struct in_addr *ip_list;
304 pthread_mutex_lock(&wins_nss_mutex);
307 frame = talloc_stackframe();
309 memset(he, '\0', sizeof(*he));
310 fstrcpy(name, hostname);
314 ip_list = lookup_byname_backend(name, &count);
317 nss_status = NSS_STATUS_NOTFOUND;
323 namelen = strlen(name) + 1;
325 if ((he->h_name = get_static(&buffer, &buflen, namelen)) == NULL) {
327 nss_status = NSS_STATUS_TRYAGAIN;
331 memcpy(he->h_name, name, namelen);
333 /* Copy h_addr_list, align to pointer boundary first */
335 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
336 i = sizeof(char*) - i;
338 if (get_static(&buffer, &buflen, i) == NULL) {
340 nss_status = NSS_STATUS_TRYAGAIN;
344 if ((he->h_addr_list = (char **)get_static(
345 &buffer, &buflen, (count + 1) * sizeof(char *))) == NULL) {
347 nss_status = NSS_STATUS_TRYAGAIN;
351 for (i = 0; i < count; i++) {
352 if ((he->h_addr_list[i] = get_static(&buffer, &buflen,
353 INADDRSZ)) == NULL) {
355 nss_status = NSS_STATUS_TRYAGAIN;
358 memcpy(he->h_addr_list[i], &ip_list[i], INADDRSZ);
361 he->h_addr_list[count] = NULL;
365 /* Set h_addr_type and h_length */
367 he->h_addrtype = AF_INET;
368 he->h_length = INADDRSZ;
372 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
373 i = sizeof(char*) - i;
375 if (get_static(&buffer, &buflen, i) == NULL) {
376 nss_status = NSS_STATUS_TRYAGAIN;
380 if ((he->h_aliases = (char **)get_static(
381 &buffer, &buflen, sizeof(char *))) == NULL) {
382 nss_status = NSS_STATUS_TRYAGAIN;
386 he->h_aliases[0] = NULL;
388 nss_status = NSS_STATUS_SUCCESS;
395 pthread_mutex_unlock(&wins_nss_mutex);
402 _nss_wins_gethostbyname2_r(const char *name, int af, struct hostent *he,
403 char *buffer, size_t buflen, int *h_errnop)
405 NSS_STATUS nss_status;
409 nss_status = NSS_STATUS_UNAVAIL;
411 nss_status = _nss_wins_gethostbyname_r(
412 name, he, buffer, buflen, h_errnop);