source: trunk-3.0/source/nsswitch/winbindd_wins.c@ 103

Last change on this file since 103 was 1, checked in by Paul Smedley, 19 years ago

Initial code import
File size: 5.6 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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22*/
23
24#include "includes.h"
25#include "winbindd.h"
26
27#undef DBGC_CLASS
28#define DBGC_CLASS DBGC_WINBIND
29
30/* Use our own create socket code so we don't recurse.... */
31
32static int wins_lookup_open_socket_in(void)
33{
34 struct sockaddr_in sock;
35 int val=1;
36 int res;
37
38 memset((char *)&sock,'\0',sizeof(sock));
39
40#ifdef HAVE_SOCK_SIN_LEN
41 sock.sin_len = sizeof(sock);
42#endif
43 sock.sin_port = 0;
44 sock.sin_family = AF_INET;
45 sock.sin_addr.s_addr = interpret_addr("0.0.0.0");
46 res = socket(AF_INET, SOCK_DGRAM, 0);
47 if (res == -1)
48 return -1;
49
50 setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val));
51#ifdef SO_REUSEPORT
52 setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val));
53#endif /* SO_REUSEPORT */
54
55 /* now we've got a socket - we need to bind it */
56
57 if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) < 0) {
58 close(res);
59 return(-1);
60 }
61
62 set_socket_options(res,"SO_BROADCAST");
63
64 return res;
65}
66
67
68static NODE_STATUS_STRUCT *lookup_byaddr_backend(char *addr, int *count)
69{
70 int fd;
71 struct in_addr ip;
72 struct nmb_name nname;
73 NODE_STATUS_STRUCT *status;
74
75 fd = wins_lookup_open_socket_in();
76 if (fd == -1)
77 return NULL;
78
79 make_nmb_name(&nname, "*", 0);
80 ip = *interpret_addr2(addr);
81 status = node_status_query(fd,&nname,ip, count, NULL);
82
83 close(fd);
84 return status;
85}
86
87static struct in_addr *lookup_byname_backend(const char *name, int *count)
88{
89 int fd;
90 struct ip_service *ret = NULL;
91 struct in_addr *return_ip = NULL;
92 int j, i, flags = 0;
93
94 *count = 0;
95
96 /* always try with wins first */
97 if (resolve_wins(name,0x20,&ret,count)) {
98 if ( *count == 0 )
99 return NULL;
100 if ( (return_ip = SMB_MALLOC_ARRAY(struct in_addr, *count)) == NULL ) {
101 free( ret );
102 return NULL;
103 }
104
105 /* copy the IP addresses */
106 for ( i=0; i<(*count); i++ )
107 return_ip[i] = ret[i].ip;
108
109 free( ret );
110 return return_ip;
111 }
112
113 fd = wins_lookup_open_socket_in();
114 if (fd == -1) {
115 return NULL;
116 }
117
118 /* uggh, we have to broadcast to each interface in turn */
119 for (j=iface_count() - 1;
120 j >= 0;
121 j--) {
122 struct in_addr *bcast = iface_n_bcast(j);
123 return_ip = name_query(fd,name,0x20,True,True,*bcast,count, &flags, NULL);
124 if (return_ip) {
125 break;
126 }
127 }
128
129 close(fd);
130 return return_ip;
131}
132
133/* Get hostname from IP */
134
135void winbindd_wins_byip(struct winbindd_cli_state *state)
136{
137 fstring response;
138 int i, count, maxlen, size;
139 NODE_STATUS_STRUCT *status;
140
141 /* Ensure null termination */
142 state->request.data.winsreq[sizeof(state->request.data.winsreq)-1]='\0';
143
144 DEBUG(3, ("[%5lu]: wins_byip %s\n", (unsigned long)state->pid,
145 state->request.data.winsreq));
146
147 *response = '\0';
148 maxlen = sizeof(response) - 1;
149
150 if ((status = lookup_byaddr_backend(state->request.data.winsreq, &count))){
151 size = strlen(state->request.data.winsreq);
152 if (size > maxlen) {
153 SAFE_FREE(status);
154 request_error(state);
155 return;
156 }
157 fstrcat(response,state->request.data.winsreq);
158 fstrcat(response,"\t");
159 for (i = 0; i < count; i++) {
160 /* ignore group names */
161 if (status[i].flags & 0x80) continue;
162 if (status[i].type == 0x20) {
163 size = sizeof(status[i].name) + strlen(response);
164 if (size > maxlen) {
165 SAFE_FREE(status);
166 request_error(state);
167 return;
168 }
169 fstrcat(response, status[i].name);
170 fstrcat(response, " ");
171 }
172 }
173 /* make last character a newline */
174 response[strlen(response)-1] = '\n';
175 SAFE_FREE(status);
176 }
177 fstrcpy(state->response.data.winsresp,response);
178 request_ok(state);
179}
180
181/* Get IP from hostname */
182
183void winbindd_wins_byname(struct winbindd_cli_state *state)
184{
185 struct in_addr *ip_list;
186 int i, count, maxlen, size;
187 fstring response;
188 char * addr;
189
190 /* Ensure null termination */
191 state->request.data.winsreq[sizeof(state->request.data.winsreq)-1]='\0';
192
193 DEBUG(3, ("[%5lu]: wins_byname %s\n", (unsigned long)state->pid,
194 state->request.data.winsreq));
195
196 *response = '\0';
197 maxlen = sizeof(response) - 1;
198
199 if ((ip_list = lookup_byname_backend(state->request.data.winsreq,&count))){
200 for (i = count; i ; i--) {
201 addr = inet_ntoa(ip_list[i-1]);
202 size = strlen(addr);
203 if (size > maxlen) {
204 SAFE_FREE(ip_list);
205 request_error(state);
206 return;
207 }
208 if (i != 0) {
209 /* Clear out the newline character */
210 /* But only if there is something in there,
211 otherwise we clobber something in the stack */
212 if (strlen(response))
213 response[strlen(response)-1] = ' ';
214 }
215 fstrcat(response,addr);
216 fstrcat(response,"\t");
217 }
218 size = strlen(state->request.data.winsreq) + strlen(response);
219 if (size > maxlen) {
220 SAFE_FREE(ip_list);
221 request_error(state);
222 return;
223 }
224 fstrcat(response,state->request.data.winsreq);
225 fstrcat(response,"\n");
226 SAFE_FREE(ip_list);
227 } else {
228 request_error(state);
229 return;
230 }
231
232 fstrcpy(state->response.data.winsresp,response);
233
234 request_ok(state);
235}
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