1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/*
Unix SMB/Netbios implementation.
Version 1.9.
NBT netbios routines and daemon - version 2
Copyright (C) Andrew Tridgell 1994-1998
Copyright (C) Luke Kenneth Casson Leighton 1994-1998
Copyright (C) Jeremy Allison 1994-1998
Copyright (C) Christopher R. Hertel 1998
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* -------------------------------------------------------------------------- **
* Modified July 1998 by CRH.
* I converted this module to use the canned doubly-linked lists. I also
* added comments above the functions where possible.
*/
#include "includes.h"
extern int DEBUGLEVEL;
/* -------------------------------------------------------------------------- **
* Variables...
*
* lmb_browserlist - This is our local master browser list.
*/
ubi_dlNewList( lmb_browserlist );
/* -------------------------------------------------------------------------- **
* Functions...
*/
/* ************************************************************************** **
* Remove and free a browser list entry.
*
* Input: browc - A pointer to the entry to be removed from the list and
* freed.
* Output: none.
*
* ************************************************************************** **
*/
static void remove_lmb_browser_entry( struct browse_cache_record *browc )
{
free( (char *)ubi_dlRemThis( lmb_browserlist, browc ) );
} /* remove_lmb_browser_entry */
/* ************************************************************************** **
* Update a browser death time.
*
* Input: browc - Pointer to the entry to be updated.
* Output: none.
*
* ************************************************************************** **
*/
void update_browser_death_time( struct browse_cache_record *browc )
{
/* Allow the new lmb to miss an announce period before we remove it. */
browc->death_time = time(NULL) + ( (CHECK_TIME_MST_ANNOUNCE + 2) * 60 );
} /* update_browser_death_time */
/* ************************************************************************** **
* Create a browser entry and add it to the local master browser list.
*
* Input: work_name
* browser_name
* ip
*
* Output: Pointer to the new entry, or NULL if malloc() failed.
*
* ************************************************************************** **
*/
struct browse_cache_record *create_browser_in_lmb_cache( char *work_name,
char *browser_name,
struct in_addr ip )
{
struct browse_cache_record *browc;
time_t now = time( NULL );
browc = (struct browse_cache_record *)malloc( sizeof( *browc ) );
if( NULL == browc )
{
DEBUG( 0, ("create_browser_in_lmb_cache: malloc fail !\n") );
return( NULL );
}
bzero( (char *)browc, sizeof( *browc ) );
/* For a new lmb entry we want to sync with it after one minute. This
will allow it time to send out a local announce and build its
browse list.
*/
browc->sync_time = now + 60;
/* Allow the new lmb to miss an announce period before we remove it. */
browc->death_time = now + ( (CHECK_TIME_MST_ANNOUNCE + 2) * 60 );
StrnCpy( browc->lmb_name, browser_name, sizeof(browc->lmb_name)-1 );
StrnCpy( browc->work_group, work_name, sizeof(browc->work_group)-1 );
strupper( browc->lmb_name );
strupper( browc->work_group );
browc->ip = ip;
(void)ubi_dlAddTail( lmb_browserlist, browc );
if( DEBUGLVL( 3 ) )
{
Debug1( "nmbd_browserdb:create_browser_in_lmb_cache()\n" );
Debug1( " Added lmb cache entry for workgroup %s ", browc->work_group );
Debug1( "name %s IP %s ", browc->lmb_name, inet_ntoa(ip) );
Debug1( "ttl %d\n", (int)browc->death_time );
}
return( browc );
} /* create_browser_in_lmb_cache */
/* ************************************************************************** **
* Find a browser entry in the local master browser list.
*
* Input: browser_name - The name for which to search.
*
* Output: A pointer to the matching entry, or NULL if no match was found.
*
* ************************************************************************** **
*/
struct browse_cache_record *find_browser_in_lmb_cache( char *browser_name )
{
struct browse_cache_record *browc;
for( browc = (struct browse_cache_record *)ubi_dlFirst( lmb_browserlist );
browc;
browc = (struct browse_cache_record *)ubi_dlNext( browc ) )
if( strequal( browser_name, browc->lmb_name ) )
break;
return( browc );
} /* find_browser_in_lmb_cache */
/* ************************************************************************** **
* Expire timed out browsers in the browserlist.
*
* Input: t - Expiration time. Entries with death times less than this
* value will be removed from the list.
* Output: none.
*
* ************************************************************************** **
*/
void expire_lmb_browsers( time_t t )
{
struct browse_cache_record *browc;
struct browse_cache_record *nextbrowc;
for( browc = (struct browse_cache_record *)ubi_dlFirst( lmb_browserlist );
browc;
browc = nextbrowc )
{
nextbrowc = (struct browse_cache_record *)ubi_dlNext( browc );
if( browc->death_time < t )
{
if( DEBUGLVL( 3 ) )
{
Debug1( "nmbd_browserdb:expire_lmb_browsers()\n" );
Debug1( " Removing timed out lmb entry %s\n", browc->lmb_name );
}
remove_lmb_browser_entry( browc );
}
}
} /* expire_lmb_browsers */
/* ************************************************************************** **
* Remove browsers from a named workgroup in the browserlist.
*
* Input: work_group - The name of the work group which is to be removed
* from the browse list.
* Output: none.
*
* ************************************************************************** **
*/
void remove_workgroup_lmb_browsers( char *work_group )
{
struct browse_cache_record *browc;
struct browse_cache_record *nextbrowc;
for( browc = (struct browse_cache_record *)ubi_dlFirst( lmb_browserlist );
browc;
browc = nextbrowc )
{
nextbrowc = (struct browse_cache_record *)ubi_dlNext( browc );
if( strequal( work_group, browc->work_group ) )
{
if( DEBUGLVL( 3 ) )
{
Debug1( "nmbd_browserdb:remove_workgroup_browsers()\n" );
Debug1( "Removing lmb entry %s\n", browc->lmb_name );
}
remove_lmb_browser_entry(browc);
}
}
} /* remove_workgroup_lmb_browsers */
/* ========================================================================== */
|
