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 if (setsockopt(res
,SOL_SOCKET
,SO_REUSEADDR
,(char *)&val
,sizeof(val
)) != 0) {
66 if (setsockopt(res
,SOL_SOCKET
,SO_REUSEPORT
,(char *)&val
,sizeof(val
)) != 0) {
70 #endif /* SO_REUSEPORT */
72 /* now we've got a socket - we need to bind it */
74 if (bind(res
, (struct sockaddr
* ) &sock
,sizeof(sock
)) < 0) {
79 set_socket_options(res
,"SO_BROADCAST");
85 static void nss_wins_init(void)
89 AllowDebugChange
= False
;
92 setup_logging("nss_wins",False
);
94 lp_load(get_dyn_CONFIGFILE(),True
,False
,False
,True
);
98 static struct in_addr
*lookup_byname_backend(const char *name
, int *count
)
101 struct ip_service
*address
= NULL
;
102 struct in_addr
*ret
= NULL
;
111 /* always try with wins first */
112 if (NT_STATUS_IS_OK(resolve_wins(name
,0x00,&address
,count
))) {
113 if ( (ret
= SMB_MALLOC_P(struct in_addr
)) == NULL
) {
117 if (address
[0].ss
.ss_family
!= AF_INET
) {
122 *ret
= ((struct sockaddr_in
*)&address
[0].ss
)->sin_addr
;
127 fd
= wins_lookup_open_socket_in();
132 /* uggh, we have to broadcast to each interface in turn */
133 for (j
=iface_count() - 1;j
>= 0;j
--) {
134 const struct in_addr
*bcast
= iface_n_bcast_v4(j
);
135 struct sockaddr_storage ss
;
136 struct sockaddr_storage
*pss
;
140 in_addr_to_sockaddr_storage(&ss
, *bcast
);
141 pss
= name_query(fd
,name
,0x00,True
,True
,&ss
,count
, &flags
, NULL
);
143 *ret
= ((struct sockaddr_in
*)pss
)->sin_addr
;
154 static NODE_STATUS_STRUCT
*lookup_byaddr_backend(char *addr
, int *count
)
157 struct sockaddr_storage ss
;
158 struct nmb_name nname
;
159 NODE_STATUS_STRUCT
*status
;
165 fd
= wins_lookup_open_socket_in();
169 make_nmb_name(&nname
, "*", 0);
170 if (!interpret_string_addr(&ss
, addr
, AI_NUMERICHOST
)) {
173 status
= node_status_query(fd
, &nname
, &ss
, count
, NULL
);
183 nsd_logprintf(NSD_LOG_MIN
, "entering init (wins)\n");
188 int lookup(nsd_file_t
*rq
)
193 struct in_addr
*ip_list
;
194 NODE_STATUS_STRUCT
*status
;
195 int i
, count
, len
, size
;
199 nsd_logprintf(NSD_LOG_MIN
, "entering lookup (wins)\n");
203 map
= nsd_attr_fetch_string(rq
->f_attrs
, "table", (char*)0);
205 rq
->f_status
= NS_FATAL
;
209 key
= nsd_attr_fetch_string(rq
->f_attrs
, "key", (char*)0);
210 if (! key
|| ! *key
) {
211 rq
->f_status
= NS_FATAL
;
216 len
= sizeof(response
) - 2;
219 * response needs to be a string of the following format
220 * ip_address[ ip_address]*\tname[ alias]*
222 if (StrCaseCmp(map
,"hosts.byaddr") == 0) {
223 if ( status
= lookup_byaddr_backend(key
, &count
)) {
224 size
= strlen(key
) + 1;
230 strncat(response
,key
,size
);
231 strncat(response
,"\t",1);
232 for (i
= 0; i
< count
; i
++) {
233 /* ignore group names */
234 if (status
[i
].flags
& 0x80) continue;
235 if (status
[i
].type
== 0x20) {
236 size
= sizeof(status
[i
].name
) + 1;
242 strncat(response
, status
[i
].name
, size
);
243 strncat(response
, " ", 1);
247 response
[strlen(response
)-1] = '\n';
250 } else if (StrCaseCmp(map
,"hosts.byname") == 0) {
251 if (ip_list
= lookup_byname_backend(key
, &count
)) {
252 for (i
= count
; i
; i
--) {
253 addr
= inet_ntoa(ip_list
[i
-1]);
254 size
= strlen(addr
) + 1;
261 response
[strlen(response
)-1] = ' ';
262 strncat(response
,addr
,size
);
263 strncat(response
,"\t",1);
265 size
= strlen(key
) + 1;
270 strncat(response
,key
,size
);
271 strncat(response
,"\n",1);
278 nsd_logprintf(NSD_LOG_LOW
, "lookup (wins %s) %s\n",map
,response
);
279 nsd_set_result(rq
,NS_SUCCESS
,response
,strlen(response
),VOLATILE
);
282 nsd_logprintf(NSD_LOG_LOW
, "lookup (wins) not found\n");
283 rq
->f_status
= NS_NOTFOUND
;
289 /* Allocate some space from the nss static buffer. The buffer and buflen
290 are the pointers passed in by the C library to the _nss_*_*
293 static char *get_static(char **buffer
, size_t *buflen
, int len
)
297 /* Error check. We return false if things aren't set up right, or
298 there isn't enough buffer space left. */
300 if ((buffer
== NULL
) || (buflen
== NULL
) || (*buflen
< len
)) {
304 /* Return an index into the static buffer */
313 /****************************************************************************
314 gethostbyname() - we ignore any domain portion of the name and only
315 handle names that are at most 15 characters long
316 **************************************************************************/
318 _nss_wins_gethostbyname_r(const char *hostname
, struct hostent
*he
,
319 char *buffer
, size_t buflen
, int *h_errnop
)
321 struct in_addr
*ip_list
;
326 memset(he
, '\0', sizeof(*he
));
327 fstrcpy(name
, hostname
);
331 ip_list
= lookup_byname_backend(name
, &count
);
334 return NSS_STATUS_NOTFOUND
;
338 namelen
= strlen(name
) + 1;
340 if ((he
->h_name
= get_static(&buffer
, &buflen
, namelen
)) == NULL
) {
342 return NSS_STATUS_TRYAGAIN
;
345 memcpy(he
->h_name
, name
, namelen
);
347 /* Copy h_addr_list, align to pointer boundary first */
349 if ((i
= (unsigned long)(buffer
) % sizeof(char*)) != 0)
350 i
= sizeof(char*) - i
;
352 if (get_static(&buffer
, &buflen
, i
) == NULL
) {
354 return NSS_STATUS_TRYAGAIN
;
357 if ((he
->h_addr_list
= (char **)get_static(
358 &buffer
, &buflen
, (count
+ 1) * sizeof(char *))) == NULL
) {
360 return NSS_STATUS_TRYAGAIN
;
363 for (i
= 0; i
< count
; i
++) {
364 if ((he
->h_addr_list
[i
] = get_static(&buffer
, &buflen
,
365 INADDRSZ
)) == NULL
) {
367 return NSS_STATUS_TRYAGAIN
;
369 memcpy(he
->h_addr_list
[i
], &ip_list
[i
], INADDRSZ
);
372 he
->h_addr_list
[count
] = NULL
;
376 /* Set h_addr_type and h_length */
378 he
->h_addrtype
= AF_INET
;
379 he
->h_length
= INADDRSZ
;
383 if ((i
= (unsigned long)(buffer
) % sizeof(char*)) != 0)
384 i
= sizeof(char*) - i
;
386 if (get_static(&buffer
, &buflen
, i
) == NULL
)
387 return NSS_STATUS_TRYAGAIN
;
389 if ((he
->h_aliases
= (char **)get_static(
390 &buffer
, &buflen
, sizeof(char *))) == NULL
)
391 return NSS_STATUS_TRYAGAIN
;
393 he
->h_aliases
[0] = NULL
;
395 return NSS_STATUS_SUCCESS
;
400 _nss_wins_gethostbyname2_r(const char *name
, int af
, struct hostent
*he
,
401 char *buffer
, size_t buflen
, int *h_errnop
)
405 return NSS_STATUS_UNAVAIL
;
408 return _nss_wins_gethostbyname_r(
409 name
, he
, buffer
, buflen
, h_errnop
);