Use thread for tun device.
[tinc] / src / connection.c
1 /*
2     connection.c -- connection list management
3     Copyright (C) 2000-2009 Guus Sliepen <guus@tinc-vpn.org>,
4                   2000-2005 Ivo Timmermans
5                   2008      Max Rijevski <maksuf@gmail.com>
6
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.
11
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.
16
17     You should have received a copy of the GNU General Public License along
18     with this program; if not, write to the Free Software Foundation, Inc.,
19     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 */
21
22 #include "system.h"
23
24 #include "splay_tree.h"
25 #include "cipher.h"
26 #include "conf.h"
27 #include "control_common.h"
28 #include "list.h"
29 #include "logger.h"
30 #include "net.h"                                /* Don't ask. */
31 #include "netutl.h"
32 #include "subnet.h"
33 #include "utils.h"
34 #include "xalloc.h"
35
36 splay_tree_t *connection_tree;  /* Meta connections */
37 connection_t *broadcast;
38
39 static int connection_compare(const connection_t *a, const connection_t *b) {
40         return a < b ? -1 : a == b ? 0 : 1;
41 }
42
43 void init_connections(void) {
44         connection_tree = splay_alloc_tree((splay_compare_t) connection_compare, (splay_action_t) free_connection);
45         broadcast = new_connection();
46         broadcast->name = xstrdup("everyone");
47         broadcast->hostname = xstrdup("BROADCAST");
48 }
49
50 void exit_connections(void) {
51         splay_delete_tree(connection_tree);
52         free_connection(broadcast);
53 }
54
55 connection_t *new_connection(void) {
56         return xmalloc_and_zero(sizeof(connection_t));
57 }
58
59 void free_connection(connection_t *c) {
60         if(!c)
61                 return;
62
63         if(c->name)
64                 free(c->name);
65
66         if(c->hostname)
67                 free(c->hostname);
68
69         cipher_close(&c->incipher);
70         cipher_close(&c->outcipher);
71
72         if(c->hischallenge)
73                 free(c->hischallenge);
74
75         if(c->config_tree)
76                 exit_configuration(&c->config_tree);
77
78         if(c->buffer)
79                 bufferevent_free(c->buffer);
80         
81         if(event_initialized(&c->inevent))
82                 event_del(&c->inevent);
83
84         free(c);
85 }
86
87 void connection_add(connection_t *c) {
88         splay_insert(connection_tree, c);
89 }
90
91 void connection_del(connection_t *c) {
92         splay_delete(connection_tree, c);
93 }
94
95 bool dump_connections(connection_t *cdump) {
96         splay_node_t *node;
97         connection_t *c;
98
99         for(node = connection_tree->head; node; node = node->next) {
100                 c = node->data;
101                 send_request(cdump, "%d %d %s at %s options %x socket %d status %04x",
102                                 CONTROL, REQ_DUMP_CONNECTIONS,
103                                 c->name, c->hostname, c->options, c->socket,
104                                 bitfield_to_int(&c->status, sizeof c->status));
105         }
106
107         return send_request(cdump, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
108 }