source: vendor/3.5.9/source3/winbindd/winbindd_wins.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 5.8 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 Winbind daemon - WINS related functions
5
6 Copyright (C) Andrew Tridgell 1999
7 Copyright (C) Herb Lewis 2002
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21*/
22
23#include "includes.h"
24#include "winbindd.h"
25
26#undef DBGC_CLASS
27#define DBGC_CLASS DBGC_WINBIND
28
29/* Use our own create socket code so we don't recurse.... */
30
31static int wins_lookup_open_socket_in(void)
32{
33 struct sockaddr_in sock;
34 int val=1;
35 int res;
36
37 memset((char *)&sock,'\0',sizeof(sock));
38
39#ifdef HAVE_SOCK_SIN_LEN
40 sock.sin_len = sizeof(sock);
41#endif
42 sock.sin_port = 0;
43 sock.sin_family = AF_INET;
44 sock.sin_addr.s_addr = interpret_addr("0.0.0.0");
45 res = socket(AF_INET, SOCK_DGRAM, 0);
46 if (res == -1)
47 return -1;
48
49 if (setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val))) {
50 close(res);
51 return -1;
52 }
53#ifdef SO_REUSEPORT
54 if (setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val))) {
55 close(res);
56 return -1;
57 }
58#endif /* SO_REUSEPORT */
59
60 /* now we've got a socket - we need to bind it */
61
62 if (bind(res, (struct sockaddr *)(void *)&sock, sizeof(sock)) < 0) {
63 close(res);
64 return(-1);
65 }
66
67 set_socket_options(res,"SO_BROADCAST");
68
69 return res;
70}
71
72
73static NODE_STATUS_STRUCT *lookup_byaddr_backend(const char *addr, int *count)
74{
75 int fd;
76 struct sockaddr_storage ss;
77 struct nmb_name nname;
78 NODE_STATUS_STRUCT *status;
79
80 fd = wins_lookup_open_socket_in();
81 if (fd == -1)
82 return NULL;
83
84 make_nmb_name(&nname, "*", 0);
85 if (!interpret_string_addr(&ss, addr, AI_NUMERICHOST)) {
86 return NULL;
87 }
88 status = node_status_query(fd, &nname, &ss, count, NULL);
89
90 close(fd);
91 return status;
92}
93
94static struct sockaddr_storage *lookup_byname_backend(const char *name,
95 int *count)
96{
97 int fd;
98 struct ip_service *ret = NULL;
99 struct sockaddr_storage *return_ss = NULL;
100 int j, i, flags = 0;
101
102 *count = 0;
103
104 /* always try with wins first */
105 if (NT_STATUS_IS_OK(resolve_wins(name,0x20,&ret,count))) {
106 if ( *count == 0 )
107 return NULL;
108 if ( (return_ss = SMB_MALLOC_ARRAY(struct sockaddr_storage, *count)) == NULL ) {
109 free( ret );
110 return NULL;
111 }
112
113 /* copy the IP addresses */
114 for ( i=0; i<(*count); i++ )
115 return_ss[i] = ret[i].ss;
116
117 free( ret );
118 return return_ss;
119 }
120
121 fd = wins_lookup_open_socket_in();
122 if (fd == -1) {
123 return NULL;
124 }
125
126 /* uggh, we have to broadcast to each interface in turn */
127 for (j=iface_count() - 1;
128 j >= 0;
129 j--) {
130 const struct sockaddr_storage *bcast_ss = iface_n_bcast(j);
131 if (!bcast_ss) {
132 continue;
133 }
134 return_ss = name_query(fd,name,0x20,True,True,bcast_ss,count, &flags, NULL);
135 if (return_ss) {
136 break;
137 }
138 }
139
140 close(fd);
141 return return_ss;
142}
143
144/* Get hostname from IP */
145
146void winbindd_wins_byip(struct winbindd_cli_state *state)
147{
148 fstring response;
149 int i, count, maxlen, size;
150 NODE_STATUS_STRUCT *status;
151
152 /* Ensure null termination */
153 state->request->data.winsreq[sizeof(state->request->data.winsreq)-1]='\0';
154
155 DEBUG(3, ("[%5lu]: wins_byip %s\n", (unsigned long)state->pid,
156 state->request->data.winsreq));
157
158 *response = '\0';
159 maxlen = sizeof(response) - 1;
160
161 if ((status = lookup_byaddr_backend(state->request->data.winsreq, &count))){
162 size = strlen(state->request->data.winsreq);
163 if (size > maxlen) {
164 SAFE_FREE(status);
165 request_error(state);
166 return;
167 }
168 fstrcat(response,state->request->data.winsreq);
169 fstrcat(response,"\t");
170 for (i = 0; i < count; i++) {
171 /* ignore group names */
172 if (status[i].flags & 0x80) continue;
173 if (status[i].type == 0x20) {
174 size = sizeof(status[i].name) + strlen(response);
175 if (size > maxlen) {
176 SAFE_FREE(status);
177 request_error(state);
178 return;
179 }
180 fstrcat(response, status[i].name);
181 fstrcat(response, " ");
182 }
183 }
184 /* make last character a newline */
185 response[strlen(response)-1] = '\n';
186 SAFE_FREE(status);
187 }
188 fstrcpy(state->response->data.winsresp,response);
189 request_ok(state);
190}
191
192/* Get IP from hostname */
193
194void winbindd_wins_byname(struct winbindd_cli_state *state)
195{
196 struct sockaddr_storage *ip_list = NULL;
197 int i, count, maxlen, size;
198 fstring response;
199 char addr[INET6_ADDRSTRLEN];
200
201 /* Ensure null termination */
202 state->request->data.winsreq[sizeof(state->request->data.winsreq)-1]='\0';
203
204 DEBUG(3, ("[%5lu]: wins_byname %s\n", (unsigned long)state->pid,
205 state->request->data.winsreq));
206
207 *response = '\0';
208 maxlen = sizeof(response) - 1;
209
210 if ((ip_list = lookup_byname_backend(state->request->data.winsreq,&count))){
211 for (i = count; i ; i--) {
212 print_sockaddr(addr, sizeof(addr), &ip_list[i-1]);
213 size = strlen(addr);
214 if (size > maxlen) {
215 SAFE_FREE(ip_list);
216 request_error(state);
217 return;
218 }
219 if (i != 0) {
220 /* Clear out the newline character */
221 /* But only if there is something in there,
222 otherwise we clobber something in the stack */
223 if (strlen(response)) {
224 response[strlen(response)-1] = ' ';
225 }
226 }
227 fstrcat(response,addr);
228 fstrcat(response,"\t");
229 }
230 size = strlen(state->request->data.winsreq) + strlen(response);
231 if (size > maxlen) {
232 SAFE_FREE(ip_list);
233 request_error(state);
234 return;
235 }
236 fstrcat(response,state->request->data.winsreq);
237 fstrcat(response,"\n");
238 SAFE_FREE(ip_list);
239 } else {
240 request_error(state);
241 return;
242 }
243
244 fstrcpy(state->response->data.winsresp,response);
245
246 request_ok(state);
247}
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