source: trunk-3.0/source/nmbd/nmbd_mynames.c@ 101

Last change on this file since 101 was 1, checked in by Paul Smedley, 19 years ago

Initial code import
File size: 7.5 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 NBT netbios routines and daemon - version 2
4 Copyright (C) Andrew Tridgell 1994-1998
5 Copyright (C) Luke Kenneth Casson Leighton 1994-1998
6 Copyright (C) Jeremy Allison 1994-2003
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22*/
23
24#include "includes.h"
25
26extern uint16 samba_nb_type; /* Samba's NetBIOS type. */
27
28/****************************************************************************
29 Fail funtion when registering my netbios names.
30**************************************************************************/
31
32static void my_name_register_failed(struct subnet_record *subrec,
33 struct response_record *rrec, struct nmb_name *nmbname)
34{
35 DEBUG(0,("my_name_register_failed: Failed to register my name %s on subnet %s.\n",
36 nmb_namestr(nmbname), subrec->subnet_name));
37}
38
39
40/****************************************************************************
41 Add my workgroup and my given names to one subnet
42 Also add the magic Samba names.
43**************************************************************************/
44
45void register_my_workgroup_one_subnet(struct subnet_record *subrec)
46{
47 int i;
48
49 struct work_record *work;
50
51 /* Create the workgroup on the subnet. */
52 if((work = create_workgroup_on_subnet(subrec, lp_workgroup(),
53 PERMANENT_TTL)) == NULL) {
54 DEBUG(0,("register_my_workgroup_and_names: Failed to create my workgroup %s on subnet %s. \
55Exiting.\n", lp_workgroup(), subrec->subnet_name));
56 return;
57 }
58
59 /* Each subnet entry, except for the wins_server_subnet has
60 the magic Samba names. */
61 add_samba_names_to_subnet(subrec);
62
63 /* Register all our names including aliases. */
64 for (i=0; my_netbios_names(i); i++) {
65 register_name(subrec, my_netbios_names(i),0x20,samba_nb_type,
66 NULL,
67 my_name_register_failed, NULL);
68 register_name(subrec, my_netbios_names(i),0x03,samba_nb_type,
69 NULL,
70 my_name_register_failed, NULL);
71 register_name(subrec, my_netbios_names(i),0x00,samba_nb_type,
72 NULL,
73 my_name_register_failed, NULL);
74 }
75
76 /* Initiate election processing, register the workgroup names etc. */
77 initiate_myworkgroup_startup(subrec, work);
78}
79
80/*******************************************************************
81 Utility function to add a name to the unicast subnet, or add in
82 our IP address if it already exists.
83******************************************************************/
84
85static void insert_refresh_name_into_unicast( struct subnet_record *subrec,
86 struct nmb_name *nmbname, uint16 nb_type )
87{
88 struct name_record *namerec;
89
90 if (!we_are_a_wins_client()) {
91 insert_permanent_name_into_unicast(subrec, nmbname, nb_type);
92 return;
93 }
94
95 if((namerec = find_name_on_subnet(unicast_subnet, nmbname, FIND_SELF_NAME)) == NULL) {
96 unstring name;
97 pull_ascii_nstring(name, sizeof(name), nmbname->name);
98 /* The name needs to be created on the unicast subnet. */
99 (void)add_name_to_subnet( unicast_subnet, name,
100 nmbname->name_type, nb_type,
101 MIN(lp_max_ttl(), MAX_REFRESH_TIME), SELF_NAME, 1, &subrec->myip);
102 } else {
103 /* The name already exists on the unicast subnet. Add our local
104 IP for the given broadcast subnet to the name. */
105 add_ip_to_name_record( namerec, subrec->myip);
106 }
107}
108
109/****************************************************************************
110 Add my workgroup and my given names to the subnet lists.
111 Also add the magic Samba names.
112**************************************************************************/
113
114BOOL register_my_workgroup_and_names(void)
115{
116 struct subnet_record *subrec;
117 int i;
118
119 for(subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
120 register_my_workgroup_one_subnet(subrec);
121 }
122
123 /* We still need to add the magic Samba
124 names and the netbios names to the unicast subnet directly. This is
125 to allow unicast node status requests and queries to still work
126 in a broadcast only environment. */
127
128 add_samba_names_to_subnet(unicast_subnet);
129
130 for (i=0; my_netbios_names(i); i++) {
131 for(subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
132 /*
133 * Ensure all the IP addresses are added if we are multihomed.
134 */
135 struct nmb_name nmbname;
136
137 make_nmb_name(&nmbname, my_netbios_names(i),0x20);
138 insert_refresh_name_into_unicast(subrec, &nmbname, samba_nb_type);
139
140 make_nmb_name(&nmbname, my_netbios_names(i),0x3);
141 insert_refresh_name_into_unicast(subrec, &nmbname, samba_nb_type);
142
143 make_nmb_name(&nmbname, my_netbios_names(i),0x0);
144 insert_refresh_name_into_unicast(subrec, &nmbname, samba_nb_type);
145 }
146 }
147
148 /*
149 * Add the WORKGROUP<0> and WORKGROUP<1e> group names to the unicast subnet
150 * also for the same reasons.
151 */
152
153 for(subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
154 /*
155 * Ensure all the IP addresses are added if we are multihomed.
156 */
157 struct nmb_name nmbname;
158
159 make_nmb_name(&nmbname, lp_workgroup(), 0x0);
160 insert_refresh_name_into_unicast(subrec, &nmbname, samba_nb_type|NB_GROUP);
161
162 make_nmb_name(&nmbname, lp_workgroup(), 0x1e);
163 insert_refresh_name_into_unicast(subrec, &nmbname, samba_nb_type|NB_GROUP);
164 }
165
166 /*
167 * We need to add the Samba names to the remote broadcast subnet,
168 * as NT 4.x does directed broadcast requests to the *<0x0> name.
169 */
170
171 add_samba_names_to_subnet(remote_broadcast_subnet);
172
173 return True;
174}
175
176/****************************************************************************
177 Remove all the names we registered.
178**************************************************************************/
179
180void release_wins_names(void)
181{
182 struct subnet_record *subrec = unicast_subnet;
183 struct name_record *namerec, *nextnamerec;
184
185 for (namerec = subrec->namelist; namerec; namerec = nextnamerec) {
186 nextnamerec = namerec->next;
187 if( (namerec->data.source == SELF_NAME)
188 && !NAME_IS_DEREGISTERING(namerec) )
189 release_name( subrec, namerec, standard_success_release,
190 NULL, NULL);
191 }
192}
193
194/*******************************************************************
195 Refresh our registered names with WINS
196******************************************************************/
197
198void refresh_my_names(time_t t)
199{
200 struct name_record *namerec;
201
202 if (wins_srv_count() < 1)
203 return;
204
205 for (namerec = unicast_subnet->namelist; namerec; namerec = namerec->next) {
206 /* Each SELF name has an individual time to be refreshed. */
207 if ((namerec->data.source == SELF_NAME) &&
208 (namerec->data.refresh_time < t) &&
209 (namerec->data.death_time != PERMANENT_TTL)) {
210 /* We cheat here and pretend the refresh is going to be
211 successful & update the refresh times. This stops
212 multiple refresh calls being done. We actually
213 deal with refresh failure in the fail_fn.
214 */
215 if (!is_refresh_already_queued(unicast_subnet, namerec)) {
216 wins_refresh_name(namerec);
217 }
218 namerec->data.death_time = t + lp_max_ttl();
219 namerec->data.refresh_time = t + MIN(lp_max_ttl()/2, MAX_REFRESH_TIME);
220 }
221 }
222}
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