c1a1b69f1eaf7ed2b5054fe1841cbe3b51ecfe88
[oweals/tinc.git] / src / connection.c
1 /*
2     connection.c -- connection list management
3     Copyright (C) 2000-2006 Guus Sliepen <guus@tinc-vpn.org>,
4                   2000-2005 Ivo Timmermans
5
6     This program is free software; you can redistribute it and/or modify
7     it under the terms of the GNU General Public License as published by
8     the Free Software Foundation; either version 2 of the License, or
9     (at your option) any later version.
10
11     This program is distributed in the hope that it will be useful,
12     but WITHOUT ANY WARRANTY; without even the implied warranty of
13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14     GNU General Public License for more details.
15
16     You should have received a copy of the GNU General Public License
17     along with this program; if not, write to the Free Software
18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19
20     $Id$
21 */
22
23 #include "system.h"
24
25 #include "avl_tree.h"
26 #include "conf.h"
27 #include "list.h"
28 #include "logger.h"
29 #include "net.h"                                /* Don't ask. */
30 #include "netutl.h"
31 #include "subnet.h"
32 #include "utils.h"
33 #include "xalloc.h"
34
35 avl_tree_t *connection_tree;    /* Meta connections */
36 connection_t *broadcast;
37
38 static int connection_compare(const connection_t *a, const connection_t *b)
39 {
40         return (void *)a - (void *)b;
41 }
42
43 void init_connections(void)
44 {
45         cp();
46
47         connection_tree = avl_alloc_tree((avl_compare_t) connection_compare, (avl_action_t) free_connection);
48         broadcast = new_connection();
49         broadcast->name = xstrdup(_("everyone"));
50         broadcast->hostname = xstrdup(_("BROADCAST"));
51 }
52
53 void exit_connections(void)
54 {
55         cp();
56
57         avl_delete_tree(connection_tree);
58         free_connection(broadcast);
59 }
60
61 connection_t *new_connection(void)
62 {
63         connection_t *c;
64
65         cp();
66
67         c = xmalloc_and_zero(sizeof(connection_t));
68
69         if(!c)
70                 return NULL;
71
72         gettimeofday(&c->start, NULL);
73
74         return c;
75 }
76
77 void free_connection(connection_t *c)
78 {
79         cp();
80
81         if(c->hostname)
82                 free(c->hostname);
83
84         if(c->inkey)
85                 free(c->inkey);
86
87         if(c->outkey)
88                 free(c->outkey);
89
90         if(c->mychallenge)
91                 free(c->mychallenge);
92
93         if(c->hischallenge)
94                 free(c->hischallenge);
95
96         free(c);
97 }
98
99 void connection_add(connection_t *c)
100 {
101         cp();
102
103         avl_insert(connection_tree, c);
104 }
105
106 void connection_del(connection_t *c)
107 {
108         cp();
109
110         avl_delete(connection_tree, c);
111 }
112
113 void dump_connections(void)
114 {
115         avl_node_t *node;
116         connection_t *c;
117
118         cp();
119
120         logger(LOG_DEBUG, _("Connections:"));
121
122         for(node = connection_tree->head; node; node = node->next) {
123                 c = node->data;
124                 logger(LOG_DEBUG, _(" %s at %s options %lx socket %d status %04x outbuf %d/%d/%d"),
125                            c->name, c->hostname, c->options, c->socket, *(uint32_t *)&c->status,
126                            c->outbufsize, c->outbufstart, c->outbuflen);
127         }
128
129         logger(LOG_DEBUG, _("End of connections."));
130 }
131
132 bool read_connection_config(connection_t *c)
133 {
134         char *fname;
135         int x;
136
137         cp();
138
139         asprintf(&fname, "%s/hosts/%s", confbase, c->name);
140         x = read_config_file(c->config_tree, fname);
141         free(fname);
142
143         return x == 0;
144 }