Releasing 1.1pre18.
[tinc] / src / connection.c
1 /*
2     connection.c -- connection list management
3     Copyright (C) 2000-2013 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 "list.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"
31 #include "rsa.h"
32 #include "subnet.h"
33 #include "utils.h"
34 #include "xalloc.h"
35
36 list_t *connection_list;
37 connection_t *everyone;
38
39 void init_connections(void) {
40         connection_list = list_alloc((list_action_t) free_connection);
41         everyone = new_connection();
42         everyone->name = xstrdup("everyone");
43         everyone->hostname = xstrdup("BROADCAST");
44 }
45
46 void exit_connections(void) {
47         list_delete_list(connection_list);
48         free_connection(everyone);
49 }
50
51 connection_t *new_connection(void) {
52         return xzalloc(sizeof(connection_t));
53 }
54
55 void free_connection(connection_t *c) {
56         if(!c) {
57                 return;
58         }
59
60 #ifndef DISABLE_LEGACY
61         cipher_close(c->incipher);
62         digest_close(c->indigest);
63         cipher_close(c->outcipher);
64         digest_close(c->outdigest);
65         rsa_free(c->rsa);
66 #endif
67
68         sptps_stop(&c->sptps);
69         ecdsa_free(c->ecdsa);
70
71         free(c->hischallenge);
72         free(c->mychallenge);
73
74         buffer_clear(&c->inbuf);
75         buffer_clear(&c->outbuf);
76
77         io_del(&c->io);
78
79         if(c->socket > 0) {
80                 if(c->status.tarpit) {
81                         tarpit(c->socket);
82                 } else {
83                         closesocket(c->socket);
84                 }
85         }
86
87         free(c->name);
88         free(c->hostname);
89
90         if(c->config_tree) {
91                 exit_configuration(&c->config_tree);
92         }
93
94         free(c);
95 }
96
97 void connection_add(connection_t *c) {
98         list_insert_tail(connection_list, c);
99 }
100
101 void connection_del(connection_t *c) {
102         list_delete(connection_list, c);
103 }
104
105 bool dump_connections(connection_t *cdump) {
106         for list_each(connection_t, c, connection_list) {
107                 send_request(cdump, "%d %d %s %s %x %d %x",
108                              CONTROL, REQ_DUMP_CONNECTIONS,
109                              c->name, c->hostname, c->options, c->socket,
110                              bitfield_to_int(&c->status, sizeof(c->status)));
111         }
112
113         return send_request(cdump, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
114 }