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
|
/*
Unix SMB/Netbios implementation.
Version 1.9.
connection claim routines
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 fstring remote_machine;
extern int DEBUGLEVEL;
/****************************************************************************
open the connections database
****************************************************************************/
TDB_CONTEXT *open_db(char *name)
{
pstring fname;
pstrcpy(fname,lp_lockdir());
trim_string(fname,"","/");
if (!directory_exist(fname,NULL)) {
mkdir(fname,0755);
}
pstrcat(fname,"/connections.tdb");
return tdb_open(fname, 0, O_RDWR | O_CREAT, 0644);
}
/****************************************************************************
delete a connection record
****************************************************************************/
BOOL yield_connection(connection_struct *conn,char *name,int max_connections)
{
struct connections_key key;
TDB_DATA kbuf;
TDB_CONTEXT *tdb;
if (!(tdb = open_db(name))) return False;
DEBUG(3,("Yielding connection to %s\n",name));
ZERO_STRUCT(key);
key.pid = getpid();
if (conn) key.cnum = conn->cnum;
fstrcpy(key.name, name);
kbuf.dptr = (char *)&key;
kbuf.dsize = sizeof(key);
tdb_delete(tdb, kbuf);
tdb_close(tdb);
return(True);
}
/****************************************************************************
claim an entry in the connections database
****************************************************************************/
int delete_dead(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf)
{
struct connections_key key;
memcpy(&key, kbuf.dptr, sizeof(key));
if (!process_exists(key.pid)) tdb_delete(tdb, kbuf);
return 0;
}
/****************************************************************************
claim an entry in the connections database
****************************************************************************/
BOOL claim_connection(connection_struct *conn,char *name,int max_connections,BOOL Clear)
{
struct connections_key key;
struct connections_data crec;
TDB_DATA kbuf, dbuf;
TDB_CONTEXT *tdb;
extern int Client;
if (max_connections <= 0)
return(True);
if (!(tdb = open_db(name))) return False;
DEBUG(5,("claiming %s %d\n",name,max_connections));
ZERO_STRUCT(key);
key.pid = getpid();
key.cnum = conn?conn->cnum:-1;
fstrcpy(key.name, name);
kbuf.dptr = (char *)&key;
kbuf.dsize = sizeof(key);
if (Clear) {
tdb_traverse(tdb, delete_dead);
}
/* fill in the crec */
ZERO_STRUCT(crec);
crec.magic = 0x280267;
crec.pid = getpid();
crec.cnum = conn?conn->cnum:-1;
if (conn) {
crec.uid = conn->uid;
crec.gid = conn->gid;
StrnCpy(crec.name,
lp_servicename(SNUM(conn)),sizeof(crec.name)-1);
}
crec.start = time(NULL);
StrnCpy(crec.machine,remote_machine,sizeof(crec.machine)-1);
StrnCpy(crec.addr,conn?conn->client_address:client_addr(Client),sizeof(crec.addr)-1);
dbuf.dptr = (char *)&crec;
dbuf.dsize = sizeof(crec);
if (tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) != 0) return False;
tdb_close(tdb);
return True;
}
|
