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/>.
25 #include <ns_daemon.h>
32 static int initialised;
34 extern bool AllowDebugChange;
36 NSS_STATUS _nss_wins_gethostbyname_r(const char *hostname, struct hostent *he,
37 char *buffer, size_t buflen, int *h_errnop);
38 NSS_STATUS _nss_wins_gethostbyname2_r(const char *name, int af, struct hostent *he,
39 char *buffer, size_t buflen, int *h_errnop);
41 /* Use our own create socket code so we don't recurse.... */
43 static int wins_lookup_open_socket_in(void)
45 struct sockaddr_in sock;
49 memset((char *)&sock,'\0',sizeof(sock));
51 #ifdef HAVE_SOCK_SIN_LEN
52 sock.sin_len = sizeof(sock);
55 sock.sin_family = AF_INET;
56 sock.sin_addr.s_addr = interpret_addr("0.0.0.0");
57 res = socket(AF_INET, SOCK_DGRAM, 0);
61 setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val));
63 setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val));
64 #endif /* SO_REUSEPORT */
66 /* now we've got a socket - we need to bind it */
68 if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) < 0) {
73 set_socket_options(res,"SO_BROADCAST");
79 static void nss_wins_init(void)
83 AllowDebugChange = False;
86 setup_logging("nss_wins",False);
88 lp_load(dyn_CONFIGFILE,True,False,False,True);
92 static struct in_addr *lookup_byname_backend(const char *name, int *count)
95 struct ip_service *address = NULL;
96 struct in_addr *ret = NULL;
105 /* always try with wins first */
106 if (NT_STATUS_IS_OK(resolve_wins(name,0x00,&address,count))) {
107 if ( (ret = SMB_MALLOC_P(struct in_addr)) == NULL ) {
111 *ret = address[0].ip;
116 fd = wins_lookup_open_socket_in();
121 /* uggh, we have to broadcast to each interface in turn */
122 for (j=iface_count() - 1;j >= 0;j--) {
123 const struct in_addr *bcast = iface_n_bcast_v4(j);
127 ret = name_query(fd,name,0x00,True,True,*bcast,count, &flags, NULL);
137 static NODE_STATUS_STRUCT *lookup_byaddr_backend(char *addr, int *count)
141 struct nmb_name nname;
142 NODE_STATUS_STRUCT *status;
148 fd = wins_lookup_open_socket_in();
152 make_nmb_name(&nname, "*", 0);
153 ip = *interpret_addr2(addr);
154 status = node_status_query(fd,&nname,ip, count, NULL);
164 nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
169 int lookup(nsd_file_t *rq)
174 struct in_addr *ip_list;
175 NODE_STATUS_STRUCT *status;
176 int i, count, len, size;
180 nsd_logprintf(NSD_LOG_MIN, "entering lookup (wins)\n");
184 map = nsd_attr_fetch_string(rq->f_attrs, "table", (char*)0);
186 rq->f_status = NS_FATAL;
190 key = nsd_attr_fetch_string(rq->f_attrs, "key", (char*)0);
191 if (! key || ! *key) {
192 rq->f_status = NS_FATAL;
197 len = sizeof(response) - 2;
200 * response needs to be a string of the following format
201 * ip_address[ ip_address]*\tname[ alias]*
203 if (StrCaseCmp(map,"hosts.byaddr") == 0) {
204 if ( status = lookup_byaddr_backend(key, &count)) {
205 size = strlen(key) + 1;
211 strncat(response,key,size);
212 strncat(response,"\t",1);
213 for (i = 0; i < count; i++) {
214 /* ignore group names */
215 if (status[i].flags & 0x80) continue;
216 if (status[i].type == 0x20) {
217 size = sizeof(status[i].name) + 1;
223 strncat(response, status[i].name, size);
224 strncat(response, " ", 1);
228 response[strlen(response)-1] = '\n';
231 } else if (StrCaseCmp(map,"hosts.byname") == 0) {
232 if (ip_list = lookup_byname_backend(key, &count)) {
233 for (i = count; i ; i--) {
234 addr = inet_ntoa(ip_list[i-1]);
235 size = strlen(addr) + 1;
242 response[strlen(response)-1] = ' ';
243 strncat(response,addr,size);
244 strncat(response,"\t",1);
246 size = strlen(key) + 1;
251 strncat(response,key,size);
252 strncat(response,"\n",1);
259 nsd_logprintf(NSD_LOG_LOW, "lookup (wins %s) %s\n",map,response);
260 nsd_set_result(rq,NS_SUCCESS,response,strlen(response),VOLATILE);
263 nsd_logprintf(NSD_LOG_LOW, "lookup (wins) not found\n");
264 rq->f_status = NS_NOTFOUND;
270 /* Allocate some space from the nss static buffer. The buffer and buflen
271 are the pointers passed in by the C library to the _nss_*_*
274 static char *get_static(char **buffer, size_t *buflen, int len)
278 /* Error check. We return false if things aren't set up right, or
279 there isn't enough buffer space left. */
281 if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
285 /* Return an index into the static buffer */
294 /****************************************************************************
295 gethostbyname() - we ignore any domain portion of the name and only
296 handle names that are at most 15 characters long
297 **************************************************************************/
299 _nss_wins_gethostbyname_r(const char *hostname, struct hostent *he,
300 char *buffer, size_t buflen, int *h_errnop)
302 struct in_addr *ip_list;
307 memset(he, '\0', sizeof(*he));
308 fstrcpy(name, hostname);
312 ip_list = lookup_byname_backend(name, &count);
315 return NSS_STATUS_NOTFOUND;
319 namelen = strlen(name) + 1;
321 if ((he->h_name = get_static(&buffer, &buflen, namelen)) == NULL) {
323 return NSS_STATUS_TRYAGAIN;
326 memcpy(he->h_name, name, namelen);
328 /* Copy h_addr_list, align to pointer boundary first */
330 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
331 i = sizeof(char*) - i;
333 if (get_static(&buffer, &buflen, i) == NULL) {
335 return NSS_STATUS_TRYAGAIN;
338 if ((he->h_addr_list = (char **)get_static(
339 &buffer, &buflen, (count + 1) * sizeof(char *))) == NULL) {
341 return NSS_STATUS_TRYAGAIN;
344 for (i = 0; i < count; i++) {
345 if ((he->h_addr_list[i] = get_static(&buffer, &buflen,
346 INADDRSZ)) == NULL) {
348 return NSS_STATUS_TRYAGAIN;
350 memcpy(he->h_addr_list[i], &ip_list[i], INADDRSZ);
353 he->h_addr_list[count] = NULL;
357 /* Set h_addr_type and h_length */
359 he->h_addrtype = AF_INET;
360 he->h_length = INADDRSZ;
364 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
365 i = sizeof(char*) - i;
367 if (get_static(&buffer, &buflen, i) == NULL)
368 return NSS_STATUS_TRYAGAIN;
370 if ((he->h_aliases = (char **)get_static(
371 &buffer, &buflen, sizeof(char *))) == NULL)
372 return NSS_STATUS_TRYAGAIN;
374 he->h_aliases[0] = NULL;
376 return NSS_STATUS_SUCCESS;
381 _nss_wins_gethostbyname2_r(const char *name, int af, struct hostent *he,
382 char *buffer, size_t buflen, int *h_errnop)
386 return NSS_STATUS_UNAVAIL;
389 return _nss_wins_gethostbyname_r(
390 name, he, buffer, buflen, h_errnop);