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)
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 struct ip_service *address = NULL;
63 struct in_addr *ret = NULL;
72 /* always try with wins first */
73 if (NT_STATUS_IS_OK(resolve_wins(name,0x00,&address,count))) {
74 if ( (ret = SMB_MALLOC_P(struct in_addr)) == NULL ) {
78 if (address[0].ss.ss_family != AF_INET) {
83 *ret = ((struct sockaddr_in *)(void *)&address[0].ss)
89 /* uggh, we have to broadcast to each interface in turn */
90 for (j=iface_count() - 1;j >= 0;j--) {
91 const struct in_addr *bcast = iface_n_bcast_v4(j);
92 struct sockaddr_storage ss;
93 struct sockaddr_storage *pss;
99 in_addr_to_sockaddr_storage(&ss, *bcast);
100 status = name_query(name, 0x00, True, True, &ss,
101 NULL, &pss, count, NULL);
103 if ((ret = SMB_MALLOC_P(struct in_addr)) == NULL) {
106 *ret = ((struct sockaddr_in *)pss)->sin_addr;
117 /* Use our own create socket code so we don't recurse.... */
119 static int wins_lookup_open_socket_in(void)
121 struct sockaddr_in sock;
125 memset((char *)&sock,'\0',sizeof(sock));
127 #ifdef HAVE_SOCK_SIN_LEN
128 sock.sin_len = sizeof(sock);
131 sock.sin_family = AF_INET;
132 sock.sin_addr.s_addr = interpret_addr("0.0.0.0");
133 res = socket(AF_INET, SOCK_DGRAM, 0);
137 if (setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)) != 0) {
142 if (setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val)) != 0) {
146 #endif /* SO_REUSEPORT */
148 /* now we've got a socket - we need to bind it */
150 if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) < 0) {
155 set_socket_options(res,"SO_BROADCAST");
160 static struct node_status *lookup_byaddr_backend(char *addr, int *count)
163 struct sockaddr_storage ss;
164 struct nmb_name nname;
165 struct node_status *status;
171 fd = wins_lookup_open_socket_in();
175 make_nmb_name(&nname, "*", 0);
176 if (!interpret_string_addr(&ss, addr, AI_NUMERICHOST)) {
179 status = node_status_query(fd, &nname, &ss, count, NULL);
189 nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
194 int lookup(nsd_file_t *rq)
199 struct in_addr *ip_list;
200 struct node_status *status;
201 int i, count, len, size;
205 nsd_logprintf(NSD_LOG_MIN, "entering lookup (wins)\n");
209 map = nsd_attr_fetch_string(rq->f_attrs, "table", (char*)0);
211 rq->f_status = NS_FATAL;
215 key = nsd_attr_fetch_string(rq->f_attrs, "key", (char*)0);
216 if (! key || ! *key) {
217 rq->f_status = NS_FATAL;
222 len = sizeof(response) - 2;
225 * response needs to be a string of the following format
226 * ip_address[ ip_address]*\tname[ alias]*
228 if (StrCaseCmp(map,"hosts.byaddr") == 0) {
229 if ( status = lookup_byaddr_backend(key, &count)) {
230 size = strlen(key) + 1;
236 strncat(response,key,size);
237 strncat(response,"\t",1);
238 for (i = 0; i < count; i++) {
239 /* ignore group names */
240 if (status[i].flags & 0x80) continue;
241 if (status[i].type == 0x20) {
242 size = sizeof(status[i].name) + 1;
248 strncat(response, status[i].name, size);
249 strncat(response, " ", 1);
253 response[strlen(response)-1] = '\n';
256 } else if (StrCaseCmp(map,"hosts.byname") == 0) {
257 if (ip_list = lookup_byname_backend(key, &count)) {
258 for (i = count; i ; i--) {
259 addr = inet_ntoa(ip_list[i-1]);
260 size = strlen(addr) + 1;
267 response[strlen(response)-1] = ' ';
268 strncat(response,addr,size);
269 strncat(response,"\t",1);
271 size = strlen(key) + 1;
276 strncat(response,key,size);
277 strncat(response,"\n",1);
284 nsd_logprintf(NSD_LOG_LOW, "lookup (wins %s) %s\n",map,response);
285 nsd_set_result(rq,NS_SUCCESS,response,strlen(response),VOLATILE);
288 nsd_logprintf(NSD_LOG_LOW, "lookup (wins) not found\n");
289 rq->f_status = NS_NOTFOUND;
295 /* Allocate some space from the nss static buffer. The buffer and buflen
296 are the pointers passed in by the C library to the _nss_*_*
299 static char *get_static(char **buffer, size_t *buflen, int len)
303 /* Error check. We return false if things aren't set up right, or
304 there isn't enough buffer space left. */
306 if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
310 /* Return an index into the static buffer */
319 /****************************************************************************
320 gethostbyname() - we ignore any domain portion of the name and only
321 handle names that are at most 15 characters long
322 **************************************************************************/
324 _nss_wins_gethostbyname_r(const char *hostname, struct hostent *he,
325 char *buffer, size_t buflen, int *h_errnop)
327 NSS_STATUS nss_status = NSS_STATUS_SUCCESS;
328 struct in_addr *ip_list;
335 pthread_mutex_lock(&wins_nss_mutex);
338 frame = talloc_stackframe();
340 memset(he, '\0', sizeof(*he));
341 fstrcpy(name, hostname);
345 ip_list = lookup_byname_backend(name, &count);
348 nss_status = NSS_STATUS_NOTFOUND;
354 namelen = strlen(name) + 1;
356 if ((he->h_name = get_static(&buffer, &buflen, namelen)) == NULL) {
358 nss_status = NSS_STATUS_TRYAGAIN;
362 memcpy(he->h_name, name, namelen);
364 /* Copy h_addr_list, align to pointer boundary first */
366 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
367 i = sizeof(char*) - i;
369 if (get_static(&buffer, &buflen, i) == NULL) {
371 nss_status = NSS_STATUS_TRYAGAIN;
375 if ((he->h_addr_list = (char **)get_static(
376 &buffer, &buflen, (count + 1) * sizeof(char *))) == NULL) {
378 nss_status = NSS_STATUS_TRYAGAIN;
382 for (i = 0; i < count; i++) {
383 if ((he->h_addr_list[i] = get_static(&buffer, &buflen,
384 INADDRSZ)) == NULL) {
386 nss_status = NSS_STATUS_TRYAGAIN;
389 memcpy(he->h_addr_list[i], &ip_list[i], INADDRSZ);
392 he->h_addr_list[count] = NULL;
396 /* Set h_addr_type and h_length */
398 he->h_addrtype = AF_INET;
399 he->h_length = INADDRSZ;
403 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
404 i = sizeof(char*) - i;
406 if (get_static(&buffer, &buflen, i) == NULL) {
407 nss_status = NSS_STATUS_TRYAGAIN;
411 if ((he->h_aliases = (char **)get_static(
412 &buffer, &buflen, sizeof(char *))) == NULL) {
413 nss_status = NSS_STATUS_TRYAGAIN;
417 he->h_aliases[0] = NULL;
419 nss_status = NSS_STATUS_SUCCESS;
426 pthread_mutex_unlock(&wins_nss_mutex);
433 _nss_wins_gethostbyname2_r(const char *name, int af, struct hostent *he,
434 char *buffer, size_t buflen, int *h_errnop)
436 NSS_STATUS nss_status;
440 nss_status = NSS_STATUS_UNAVAIL;
442 nss_status = _nss_wins_gethostbyname_r(
443 name, he, buffer, buflen, h_errnop);