2 Unix SMB/Netbios implementation.
4 Manage connections_struct structures
5 Copyright (C) Andrew Tridgell 1998
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 2 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 extern int DEBUGLEVEL;
26 /* set these to define the limits of the server. NOTE These are on a
27 per-client basis. Thus any one machine can't connect to more than
28 MAX_CONNECTIONS services, but any number of machines may connect at
30 #define MAX_CONNECTIONS 128
32 static connection_struct *Connections;
34 /* number of open connections */
35 static struct bitmap *bmap;
38 /****************************************************************************
39 init the conn structures
40 ****************************************************************************/
43 bmap = bitmap_allocate(MAX_CONNECTIONS);
46 /****************************************************************************
47 return the number of open connections
48 ****************************************************************************/
49 int conn_num_open(void)
55 /****************************************************************************
56 check if a snum is in use
57 ****************************************************************************/
58 BOOL conn_snum_used(int snum)
60 connection_struct *conn;
61 for (conn=Connections;conn;conn=conn->next) {
62 if (conn->service == snum) {
70 /****************************************************************************
71 find a conn given a cnum
72 ****************************************************************************/
73 connection_struct *conn_find(int cnum)
76 connection_struct *conn;
78 for (conn=Connections;conn;conn=conn->next,count++) {
79 if (conn->cnum == cnum) {
81 DLIST_PROMOTE(Connections, conn);
91 /****************************************************************************
92 find first available connection slot, starting from a random position.
93 The randomisation stops problems with the server dieing and clients
94 thinking the server is still available.
95 ****************************************************************************/
96 connection_struct *conn_new(void)
98 connection_struct *conn;
101 i = bitmap_find(bmap, 1);
104 DEBUG(1,("ERROR! Out of connection structures\n"));
108 conn = (connection_struct *)malloc(sizeof(*conn));
109 if (!conn) return NULL;
118 string_init(&conn->user,"");
119 string_init(&conn->dirpath,"");
120 string_init(&conn->connectpath,"");
121 string_init(&conn->origpath,"");
123 DLIST_ADD(Connections, conn);
128 /****************************************************************************
129 close all conn structures
130 ****************************************************************************/
131 void conn_close_all(void)
133 connection_struct *conn, *next;
134 for (conn=Connections;conn;conn=next) {
136 close_cnum(conn, (uint16)-1);
140 /****************************************************************************
141 idle inactive connections
142 ****************************************************************************/
143 BOOL conn_idle_all(time_t t, int deadtime)
146 connection_struct *conn, *next;
148 for (conn=Connections;conn;conn=next) {
150 /* close dirptrs on connections that are idle */
151 if ((t-conn->lastused) > DPTR_IDLE_TIMEOUT)
154 if (conn->num_files_open > 0 ||
155 (t-conn->lastused)<deadtime)
162 /****************************************************************************
163 free a conn structure
164 ****************************************************************************/
165 void conn_free(connection_struct *conn)
167 DLIST_REMOVE(Connections, conn);
169 if (conn->ngroups && conn->groups) {
175 free_namearray(conn->veto_list);
176 free_namearray(conn->hide_list);
177 free_namearray(conn->veto_oplock_list);
179 string_free(&conn->user);
180 string_free(&conn->dirpath);
181 string_free(&conn->connectpath);
182 string_free(&conn->origpath);
184 bitmap_clear(bmap, conn->cnum);