Convert all uses of uint8/16/32 to _t in nmbd and the include file.
[samba.git] / source3 / nmbd / nmbd_winsproxy.c
1 /* 
2    Unix SMB/CIFS implementation.
3    NBT netbios routines and daemon - version 2
4
5    Copyright (C) Jeremy Allison 1994-1998
6
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 3 of the License, or
10    (at your option) any later version.
11    
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16    
17    You should have received a copy of the GNU General Public License
18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
19    
20 */
21
22 #include "includes.h"
23 #include "nmbd/nmbd.h"
24
25 /****************************************************************************
26 Function called when the name lookup succeeded.
27 ****************************************************************************/
28
29 static void wins_proxy_name_query_request_success( struct subnet_record *subrec,
30                         struct userdata_struct *userdata,
31                         struct nmb_name *nmbname, struct in_addr ip, struct res_rec *rrec)
32 {
33         unstring name;
34         struct packet_struct *original_packet;
35         struct subnet_record *orig_broadcast_subnet;
36         struct name_record *namerec = NULL;
37         uint16_t nb_flags;
38         int num_ips;
39         int i;
40         int ttl = 3600; /* By default one hour in the cache. */
41         struct in_addr *iplist;
42
43         /* Extract the original packet and the original broadcast subnet from
44                         the userdata. */
45
46         memcpy( (char *)&orig_broadcast_subnet, userdata->data, sizeof(struct subnet_record *) );
47         memcpy( (char *)&original_packet, &userdata->data[sizeof(struct subnet_record *)],
48                         sizeof(struct packet_struct *) );
49
50         if (rrec) {
51                 nb_flags = get_nb_flags( rrec->rdata );
52                 num_ips = rrec->rdlength / 6;
53         } else {
54                 nb_flags = 0;
55                 num_ips = 0;
56         }
57
58         if(num_ips == 0) {
59                 DEBUG(0,("wins_proxy_name_query_request_success: Invalid number of IP records (0) \
60 returned for name %s.\n", nmb_namestr(nmbname) ));
61                 return;
62         }
63
64         if(num_ips == 1) {
65                 iplist = &ip;
66         } else {
67                 if((iplist = SMB_MALLOC_ARRAY( struct in_addr, num_ips )) == NULL) {
68                         DEBUG(0,("wins_proxy_name_query_request_success: malloc fail !\n"));
69                         return;
70                 }
71
72                 for(i = 0; i < num_ips; i++) {
73                         putip( (char *)&iplist[i], (char *)&rrec->rdata[ (i*6) + 2]);
74                 }
75         }
76
77         /* Add the queried name to the original subnet as a WINS_PROXY_NAME. */
78
79         if(rrec->ttl == PERMANENT_TTL) {
80                 ttl = lp_max_ttl();
81         }
82
83         pull_ascii_nstring(name, sizeof(name), nmbname->name);
84         add_name_to_subnet( orig_broadcast_subnet, name,
85                                         nmbname->name_type, nb_flags, ttl,
86                                         WINS_PROXY_NAME, num_ips, iplist );
87
88         if(iplist != &ip) {
89                 SAFE_FREE(iplist);
90         }
91
92         namerec = find_name_on_subnet(orig_broadcast_subnet, nmbname, FIND_ANY_NAME);
93         if (!namerec) {
94                 DEBUG(0,("wins_proxy_name_query_request_success: failed to add "
95                         "name %s to subnet %s !\n",
96                         name,
97                         orig_broadcast_subnet->subnet_name ));
98                 return;
99         }
100
101         /*
102          * Check that none of the IP addresses we are returning is on the
103          * same broadcast subnet as the original requesting packet. If it
104          * is then don't reply (although we still need to add the name
105          * to the cache) as the actual machine will be replying also
106          * and we don't want two replies to a broadcast query.
107          */
108
109         if(namerec && original_packet->packet.nmb.header.nm_flags.bcast) {
110                 for( i = 0; i < namerec->data.num_ips; i++) {
111                         if( same_net_v4( namerec->data.ip[i], orig_broadcast_subnet->myip,
112                                         orig_broadcast_subnet->mask_ip ) ) {
113                                 DEBUG( 5, ( "wins_proxy_name_query_request_success: name %s is a WINS \
114 proxy name and is also on the same subnet (%s) as the requestor. \
115 Not replying.\n", nmb_namestr(&namerec->name), orig_broadcast_subnet->subnet_name ) );
116                                 return;
117                         }
118                 }
119         }
120
121         /* Finally reply to the original name query. */
122         reply_netbios_packet(original_packet,                /* Packet to reply to. */
123                                 0,                              /* Result code. */
124                                 NMB_QUERY,                      /* nmbd type code. */
125                                 NMB_NAME_QUERY_OPCODE,          /* opcode. */
126                                 ttl,                            /* ttl. */
127                                 rrec->rdata,                    /* data to send. */
128                                 rrec->rdlength);                /* data length. */
129 }
130
131 /****************************************************************************
132 Function called when the name lookup failed.
133 ****************************************************************************/
134
135 static void wins_proxy_name_query_request_fail(struct subnet_record *subrec,
136                                     struct response_record *rrec,
137                                     struct nmb_name *question_name, int fail_code)
138 {
139         DEBUG(4,("wins_proxy_name_query_request_fail: WINS server returned error code %d for lookup \
140 of name %s.\n", fail_code, nmb_namestr(question_name) ));
141 }
142
143 /****************************************************************************
144 Function to make a deep copy of the userdata we will need when the WINS
145 proxy query returns.
146 ****************************************************************************/
147
148 static struct userdata_struct *wins_proxy_userdata_copy_fn(struct userdata_struct *userdata)
149 {
150         struct packet_struct *p, *copy_of_p;
151         struct userdata_struct *new_userdata = (struct userdata_struct *)SMB_MALLOC( userdata->userdata_len );
152
153         if(new_userdata == NULL)
154                 return NULL;
155
156         new_userdata->copy_fn = userdata->copy_fn;
157         new_userdata->free_fn = userdata->free_fn;
158         new_userdata->userdata_len = userdata->userdata_len;
159
160         /* Copy the subnet_record pointer. */
161         memcpy( new_userdata->data, userdata->data, sizeof(struct subnet_record *) );
162
163         /* Extract the pointer to the packet struct */
164         memcpy((char *)&p, &userdata->data[sizeof(struct subnet_record *)], sizeof(struct packet_struct *) );
165
166         /* Do a deep copy of the packet. */
167         if((copy_of_p = copy_packet(p)) == NULL) {
168                 SAFE_FREE(new_userdata);
169                 return NULL;
170         }
171
172         /* Lock the copy. */
173         copy_of_p->locked = True;
174
175         memcpy( &new_userdata->data[sizeof(struct subnet_record *)], (char *)&copy_of_p,
176                 sizeof(struct packet_struct *) );
177
178         return new_userdata;
179 }
180
181 /****************************************************************************
182 Function to free the deep copy of the userdata we used when the WINS
183 proxy query returned.
184 ****************************************************************************/
185
186 static void wins_proxy_userdata_free_fn(struct userdata_struct *userdata)
187 {
188         struct packet_struct *p;
189
190         /* Extract the pointer to the packet struct */
191         memcpy((char *)&p, &userdata->data[sizeof(struct subnet_record *)],
192                 sizeof(struct packet_struct *));
193
194         /* Unlock the packet. */
195         p->locked = False;
196
197         free_packet(p);
198         ZERO_STRUCTP(userdata);
199         SAFE_FREE(userdata);
200 }
201
202 /****************************************************************************
203  Make a WINS query on behalf of a broadcast client name query request.
204 ****************************************************************************/
205
206 void make_wins_proxy_name_query_request( struct subnet_record *subrec, 
207                                          struct packet_struct *incoming_packet,
208                                          struct nmb_name *question_name)
209 {
210         union {
211             struct userdata_struct ud;
212             char c[sizeof(struct userdata_struct) + sizeof(struct subrec *) + 
213                 sizeof(struct packet_struct *)+sizeof(long*)];
214         } ud;
215         struct userdata_struct *userdata = &ud.ud;
216         unstring qname;
217
218         memset(&ud, '\0', sizeof(ud));
219  
220         userdata->copy_fn = wins_proxy_userdata_copy_fn;
221         userdata->free_fn = wins_proxy_userdata_free_fn;
222         userdata->userdata_len = sizeof(ud);
223         memcpy( userdata->data, (char *)&subrec, sizeof(struct subnet_record *));
224         memcpy( &userdata->data[sizeof(struct subnet_record *)], (char *)&incoming_packet,
225                         sizeof(struct packet_struct *));
226
227         /* Now use the unicast subnet to query the name with the WINS server. */
228         pull_ascii_nstring(qname, sizeof(qname), question_name->name);
229         query_name( unicast_subnet, qname, question_name->name_type,
230                 wins_proxy_name_query_request_success,
231                 wins_proxy_name_query_request_fail,
232                 userdata);
233 }