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 2 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, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include <ns_daemon.h>
33 static int initialised;
35 extern BOOL AllowDebugChange;
37 /* Use our own create socket code so we don't recurse.... */
39 static int wins_lookup_open_socket_in(void)
41 struct sockaddr_in sock;
45 memset((char *)&sock,'\0',sizeof(sock));
47 #ifdef HAVE_SOCK_SIN_LEN
48 sock.sin_len = sizeof(sock);
51 sock.sin_family = AF_INET;
52 sock.sin_addr.s_addr = interpret_addr("0.0.0.0");
53 res = socket(AF_INET, SOCK_DGRAM, 0);
57 setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val));
59 setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val));
60 #endif /* SO_REUSEPORT */
62 /* now we've got a socket - we need to bind it */
64 if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) < 0) {
69 set_socket_options(res,"SO_BROADCAST");
75 static void nss_wins_init(void)
79 AllowDebugChange = False;
82 setup_logging("nss_wins",False);
83 lp_load(dyn_CONFIGFILE,True,False,False);
87 static struct in_addr *lookup_byname_backend(const char *name, int *count)
90 struct ip_service *address = NULL;
91 struct in_addr *ret = NULL;
100 /* always try with wins first */
101 if (resolve_wins(name,0x00,&address,count)) {
102 if ( (ret = SMB_MALLOC_P(struct in_addr)) == NULL ) {
106 *ret = address[0].ip;
111 fd = wins_lookup_open_socket_in();
116 /* uggh, we have to broadcast to each interface in turn */
117 for (j=iface_count() - 1;j >= 0;j--) {
118 struct in_addr *bcast = iface_n_bcast(j);
119 ret = name_query(fd,name,0x00,True,True,*bcast,count, &flags, NULL);
129 static NODE_STATUS_STRUCT *lookup_byaddr_backend(char *addr, int *count)
133 struct nmb_name nname;
134 NODE_STATUS_STRUCT *status;
140 fd = wins_lookup_open_socket_in();
144 make_nmb_name(&nname, "*", 0);
145 ip = *interpret_addr2(addr);
146 status = node_status_query(fd,&nname,ip, count, NULL);
156 nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
161 int lookup(nsd_file_t *rq)
166 struct in_addr *ip_list;
167 NODE_STATUS_STRUCT *status;
168 int i, count, len, size;
172 nsd_logprintf(NSD_LOG_MIN, "entering lookup (wins)\n");
176 map = nsd_attr_fetch_string(rq->f_attrs, "table", (char*)0);
178 rq->f_status = NS_FATAL;
182 key = nsd_attr_fetch_string(rq->f_attrs, "key", (char*)0);
183 if (! key || ! *key) {
184 rq->f_status = NS_FATAL;
189 len = sizeof(response) - 2;
192 * response needs to be a string of the following format
193 * ip_address[ ip_address]*\tname[ alias]*
195 if (StrCaseCmp(map,"hosts.byaddr") == 0) {
196 if ( status = lookup_byaddr_backend(key, &count)) {
197 size = strlen(key) + 1;
203 strncat(response,key,size);
204 strncat(response,"\t",1);
205 for (i = 0; i < count; i++) {
206 /* ignore group names */
207 if (status[i].flags & 0x80) continue;
208 if (status[i].type == 0x20) {
209 size = sizeof(status[i].name) + 1;
215 strncat(response, status[i].name, size);
216 strncat(response, " ", 1);
220 response[strlen(response)-1] = '\n';
223 } else if (StrCaseCmp(map,"hosts.byname") == 0) {
224 if (ip_list = lookup_byname_backend(key, &count)) {
225 for (i = count; i ; i--) {
226 addr = inet_ntoa(ip_list[i-1]);
227 size = strlen(addr) + 1;
234 response[strlen(response)-1] = ' ';
235 strncat(response,addr,size);
236 strncat(response,"\t",1);
238 size = strlen(key) + 1;
243 strncat(response,key,size);
244 strncat(response,"\n",1);
251 nsd_logprintf(NSD_LOG_LOW, "lookup (wins %s) %s\n",map,response);
252 nsd_set_result(rq,NS_SUCCESS,response,strlen(response),VOLATILE);
255 nsd_logprintf(NSD_LOG_LOW, "lookup (wins) not found\n");
256 rq->f_status = NS_NOTFOUND;
262 /* Allocate some space from the nss static buffer. The buffer and buflen
263 are the pointers passed in by the C library to the _nss_*_*
266 static char *get_static(char **buffer, size_t *buflen, int len)
270 /* Error check. We return false if things aren't set up right, or
271 there isn't enough buffer space left. */
273 if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
277 /* Return an index into the static buffer */
286 /****************************************************************************
287 gethostbyname() - we ignore any domain portion of the name and only
288 handle names that are at most 15 characters long
289 **************************************************************************/
291 _nss_wins_gethostbyname_r(const char *hostname, struct hostent *he,
292 char *buffer, size_t buflen, int *h_errnop)
294 struct in_addr *ip_list;
299 memset(he, '\0', sizeof(*he));
300 fstrcpy(name, hostname);
304 ip_list = lookup_byname_backend(name, &count);
307 return NSS_STATUS_NOTFOUND;
311 namelen = strlen(name) + 1;
313 if ((he->h_name = get_static(&buffer, &buflen, namelen)) == NULL)
314 return NSS_STATUS_TRYAGAIN;
316 memcpy(he->h_name, name, namelen);
318 /* Copy h_addr_list, align to pointer boundary first */
320 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
321 i = sizeof(char*) - i;
323 if (get_static(&buffer, &buflen, i) == NULL)
324 return NSS_STATUS_TRYAGAIN;
326 if ((he->h_addr_list = (char **)get_static(
327 &buffer, &buflen, (count + 1) * sizeof(char *))) == NULL)
328 return NSS_STATUS_TRYAGAIN;
330 for (i = 0; i < count; i++) {
331 if ((he->h_addr_list[i] = get_static(&buffer, &buflen,
333 return NSS_STATUS_TRYAGAIN;
334 memcpy(he->h_addr_list[i], &ip_list[i], INADDRSZ);
337 he->h_addr_list[count] = NULL;
342 /* Set h_addr_type and h_length */
344 he->h_addrtype = AF_INET;
345 he->h_length = INADDRSZ;
349 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
350 i = sizeof(char*) - i;
352 if (get_static(&buffer, &buflen, i) == NULL)
353 return NSS_STATUS_TRYAGAIN;
355 if ((he->h_aliases = (char **)get_static(
356 &buffer, &buflen, sizeof(char *))) == NULL)
357 return NSS_STATUS_TRYAGAIN;
359 he->h_aliases[0] = NULL;
361 return NSS_STATUS_SUCCESS;
366 _nss_wins_gethostbyname2_r(const char *name, int af, struct hostent *he,
367 char *buffer, size_t buflen, int *h_errnop)
371 return NSS_STATUS_UNAVAIL;
374 return _nss_wins_gethostbyname_r(
375 name, he, buffer, buflen, h_errnop);