Remove older TODO: Convert internal_resolve_name() and friends to NTSTATUS.
[metze/old/v3-2-winbind-ndr.git] / source / nsswitch / winbindd_wins.c
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
31 static 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         setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val));
50 #ifdef SO_REUSEPORT
51         setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val));
52 #endif /* SO_REUSEPORT */
53
54         /* now we've got a socket - we need to bind it */
55
56         if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) < 0) {
57                 close(res);
58                 return(-1);
59         }
60
61         set_socket_options(res,"SO_BROADCAST");
62
63         return res;
64 }
65
66
67 static NODE_STATUS_STRUCT *lookup_byaddr_backend(char *addr, int *count)
68 {
69         int fd;
70         struct in_addr  ip;
71         struct nmb_name nname;
72         NODE_STATUS_STRUCT *status;
73
74         fd = wins_lookup_open_socket_in();
75         if (fd == -1)
76                 return NULL;
77
78         make_nmb_name(&nname, "*", 0);
79         ip = *interpret_addr2(addr);
80         status = node_status_query(fd,&nname,ip, count, NULL);
81
82         close(fd);
83         return status;
84 }
85
86 static struct in_addr *lookup_byname_backend(const char *name, int *count)
87 {
88         int fd;
89         struct ip_service *ret = NULL;
90         struct in_addr *return_ip = NULL;
91         int j, i, flags = 0;
92
93         *count = 0;
94
95         /* always try with wins first */
96         if (NT_STATUS_IS_OK(resolve_wins(name,0x20,&ret,count))) {
97                 if ( *count == 0 )
98                         return NULL;
99                 if ( (return_ip = SMB_MALLOC_ARRAY(struct in_addr, *count)) == NULL ) {
100                         free( ret );
101                         return NULL;
102                 }
103
104                 /* copy the IP addresses */
105                 for ( i=0; i<(*count); i++ ) 
106                         return_ip[i] = ret[i].ip;
107                 
108                 free( ret );
109                 return return_ip;
110         }
111
112         fd = wins_lookup_open_socket_in();
113         if (fd == -1) {
114                 return NULL;
115         }
116
117         /* uggh, we have to broadcast to each interface in turn */
118         for (j=iface_count() - 1;
119              j >= 0;
120              j--) {
121                 struct in_addr *bcast = iface_n_bcast(j);
122                 return_ip = name_query(fd,name,0x20,True,True,*bcast,count, &flags, NULL);
123                 if (return_ip) {
124                         break;
125                 }
126         }
127
128         close(fd);
129         return return_ip;
130 }
131
132 /* Get hostname from IP  */
133
134 void winbindd_wins_byip(struct winbindd_cli_state *state)
135 {
136         fstring response;
137         int i, count, maxlen, size;
138         NODE_STATUS_STRUCT *status;
139
140         /* Ensure null termination */
141         state->request.data.winsreq[sizeof(state->request.data.winsreq)-1]='\0';
142
143         DEBUG(3, ("[%5lu]: wins_byip %s\n", (unsigned long)state->pid,
144                 state->request.data.winsreq));
145
146         *response = '\0';
147         maxlen = sizeof(response) - 1;
148
149         if ((status = lookup_byaddr_backend(state->request.data.winsreq, &count))){
150             size = strlen(state->request.data.winsreq);
151             if (size > maxlen) {
152                 SAFE_FREE(status);
153                 request_error(state);
154                 return;
155             }
156             fstrcat(response,state->request.data.winsreq);
157             fstrcat(response,"\t");
158             for (i = 0; i < count; i++) {
159                 /* ignore group names */
160                 if (status[i].flags & 0x80) continue;
161                 if (status[i].type == 0x20) {
162                         size = sizeof(status[i].name) + strlen(response);
163                         if (size > maxlen) {
164                             SAFE_FREE(status);
165                             request_error(state);
166                             return;
167                         }
168                         fstrcat(response, status[i].name);
169                         fstrcat(response, " ");
170                 }
171             }
172             /* make last character a newline */
173             response[strlen(response)-1] = '\n';
174             SAFE_FREE(status);
175         }
176         fstrcpy(state->response.data.winsresp,response);
177         request_ok(state);
178 }
179
180 /* Get IP from hostname */
181
182 void winbindd_wins_byname(struct winbindd_cli_state *state)
183 {
184         struct in_addr *ip_list;
185         int i, count, maxlen, size;
186         fstring response;
187         char * addr;
188
189         /* Ensure null termination */
190         state->request.data.winsreq[sizeof(state->request.data.winsreq)-1]='\0';
191
192         DEBUG(3, ("[%5lu]: wins_byname %s\n", (unsigned long)state->pid,
193                 state->request.data.winsreq));
194
195         *response = '\0';
196         maxlen = sizeof(response) - 1;
197
198         if ((ip_list = lookup_byname_backend(state->request.data.winsreq,&count))){
199                 for (i = count; i ; i--) {
200                     addr = inet_ntoa(ip_list[i-1]);
201                     size = strlen(addr);
202                     if (size > maxlen) {
203                         SAFE_FREE(ip_list);
204                         request_error(state);
205                         return;
206                     }
207                     if (i != 0) {
208                         /* Clear out the newline character */
209                         /* But only if there is something in there, 
210                            otherwise we clobber something in the stack */
211                         if (strlen(response))
212                                 response[strlen(response)-1] = ' '; 
213                     }
214                     fstrcat(response,addr);
215                     fstrcat(response,"\t");
216                 }
217                 size = strlen(state->request.data.winsreq) + strlen(response);
218                 if (size > maxlen) {
219                     SAFE_FREE(ip_list);
220                     request_error(state);
221                     return;
222                 }   
223                 fstrcat(response,state->request.data.winsreq);
224                 fstrcat(response,"\n");
225                 SAFE_FREE(ip_list);
226         } else {
227                 request_error(state);
228                 return;
229         }
230
231         fstrcpy(state->response.data.winsresp,response);
232
233         request_ok(state);
234 }