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
|
/*
Unix SMB/Netbios implementation.
Version 1.9.
Manage connections_struct structures
Copyright (C) Andrew Tridgell 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.
*/
#include "includes.h"
extern int DEBUGLEVEL;
/* set these to define the limits of the server. NOTE These are on a
per-client basis. Thus any one machine can't connect to more than
MAX_CONNECTIONS services, but any number of machines may connect at
one time. */
#define MAX_CONNECTIONS 128
static connection_struct *Connections;
/* number of open connections */
static struct bitmap *bmap;
static int num_open;
/****************************************************************************
init the conn structures
****************************************************************************/
void conn_init(void)
{
bmap = bitmap_allocate(MAX_CONNECTIONS);
}
/****************************************************************************
return the number of open connections
****************************************************************************/
int conn_num_open(void)
{
return num_open;
}
/****************************************************************************
check if a snum is in use
****************************************************************************/
BOOL conn_snum_used(int snum)
{
connection_struct *conn;
for (conn=Connections;conn;conn=conn->next) {
if (conn->service == snum) {
return(True);
}
}
return(False);
}
/****************************************************************************
find a conn given a cnum
****************************************************************************/
connection_struct *conn_find(int cnum)
{
int count=0;
connection_struct *conn;
for (conn=Connections;conn;conn=conn->next,count++) {
if (conn->cnum == cnum) {
if (count > 10) {
DLIST_PROMOTE(Connections, conn);
}
return conn;
}
}
return NULL;
}
/****************************************************************************
find first available connection slot, starting from a random position.
The randomisation stops problems with the server dieing and clients
thinking the server is still available.
****************************************************************************/
connection_struct *conn_new(void)
{
connection_struct *conn;
int i;
i = bitmap_find(bmap, 1);
if (i == -1) {
DEBUG(1,("ERROR! Out of connection structures\n"));
return NULL;
}
conn = (connection_struct *)malloc(sizeof(*conn));
if (!conn) return NULL;
ZERO_STRUCTP(conn);
conn->cnum = i;
bitmap_set(bmap, i);
num_open++;
string_init(&conn->user,"");
string_init(&conn->dirpath,"");
string_init(&conn->connectpath,"");
string_init(&conn->origpath,"");
DLIST_ADD(Connections, conn);
return conn;
}
/****************************************************************************
close all conn structures
****************************************************************************/
void conn_close_all(void)
{
connection_struct *conn, *next;
for (conn=Connections;conn;conn=next) {
next=conn->next;
close_cnum(conn, (uint16)-1);
}
}
/****************************************************************************
idle inactive connections
****************************************************************************/
BOOL conn_idle_all(time_t t, int deadtime)
{
BOOL allidle = True;
connection_struct *conn, *next;
for (conn=Connections;conn;conn=next) {
next=conn->next;
/* close dirptrs on connections that are idle */
if ((t-conn->lastused) > DPTR_IDLE_TIMEOUT)
dptr_idlecnum(conn);
if (conn->num_files_open > 0 ||
(t-conn->lastused)<deadtime)
allidle = False;
}
return allidle;
}
/****************************************************************************
free a conn structure
****************************************************************************/
void conn_free(connection_struct *conn)
{
DLIST_REMOVE(Connections, conn);
if (conn->ngroups && conn->groups) {
free(conn->groups);
conn->groups = NULL;
conn->ngroups = 0;
}
free_namearray(conn->veto_list);
free_namearray(conn->hide_list);
free_namearray(conn->veto_oplock_list);
string_free(&conn->user);
string_free(&conn->dirpath);
string_free(&conn->connectpath);
string_free(&conn->origpath);
bitmap_clear(bmap, conn->cnum);
num_open--;
ZERO_STRUCTP(conn);
free(conn);
}
|
