Use thread for tun device.
[tinc] / src / connection.h
1 /*
2     connection.h -- header for connection.c
3     Copyright (C) 2000-2010 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 along
17     with this program; if not, write to the Free Software Foundation, Inc.,
18     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21 #ifndef __TINC_CONNECTION_H__
22 #define __TINC_CONNECTION_H__
23
24 #include "cipher.h"
25 #include "digest.h"
26 #include "rsa.h"
27 #include "splay_tree.h"
28
29 #define OPTION_INDIRECT         0x0001
30 #define OPTION_TCPONLY          0x0002
31 #define OPTION_PMTU_DISCOVERY   0x0004
32 #define OPTION_CLAMP_MSS        0x0008
33
34 typedef struct connection_status_t {
35                 int pinged:1;                           /* sent ping */
36                 int active:1;                           /* 1 if active.. */
37                 int connecting:1;                       /* 1 if we are waiting for a non-blocking connect() to finish */
38                 int termreq:1;                          /* the termination of this connection was requested */
39                 int remove_unused:1;                            /* Set to 1 if you want this connection removed */
40                 int timeout_unused:1;                           /* 1 if gotten timeout */
41                 int encryptout:1;                       /* 1 if we can encrypt outgoing traffic */
42                 int decryptin:1;                        /* 1 if we have to decrypt incoming traffic */
43                 int mst:1;                              /* 1 if this connection is part of a minimum spanning tree */
44                 int control:1;
45                 int unused:22;
46 } connection_status_t;
47
48 #include "edge.h"
49 #include "list.h"
50 #include "net.h"
51 #include "node.h"
52
53 typedef struct connection_t {
54         char *name;                                     /* name he claims to have */
55
56         union sockaddr_t address;                       /* his real (internet) ip */
57         char *hostname;                         /* the hostname of its real ip */
58         int protocol_version;           /* used protocol */
59
60         int socket;                                     /* socket used for this connection */
61         uint32_t options;                       /* options for this connection */
62         connection_status_t status;     /* status info */
63         int estimated_weight;           /* estimation for the weight of the edge for this connection */
64         struct timeval start;           /* time this connection was started, used for above estimation */
65         struct outgoing_t *outgoing;    /* used to keep track of outgoing connections */
66
67         struct node_t *node;            /* node associated with the other end */
68         struct edge_t *edge;            /* edge associated with this connection */
69
70         rsa_t rsa;                      /* his public/private key */
71         cipher_t incipher;              /* Cipher he will use to send data to us */
72         cipher_t outcipher;             /* Cipher we will use to send data to him */
73         digest_t indigest;
74         digest_t outdigest;
75
76         int inmaclength;
77         int outmaclength;
78         int incompression;
79         int outcompression;
80
81         char *hischallenge;             /* The challenge we sent to him */
82
83         struct bufferevent *buffer;                     /* buffer events on this metadata connection */
84         struct event inevent;                           /* input event on this metadata connection */
85         int tcplen;                                     /* length of incoming TCPpacket */
86         int allow_request;                      /* defined if there's only one request possible */
87
88         time_t last_ping_time;          /* last time we saw some activity from the other end or pinged them */
89
90         splay_tree_t *config_tree;      /* Pointer to configuration tree belonging to him */
91 } connection_t;
92
93 extern splay_tree_t *connection_tree;
94 extern connection_t *broadcast;
95
96 extern void init_connections(void);
97 extern void exit_connections(void);
98 extern connection_t *new_connection(void) __attribute__ ((__malloc__));
99 extern void free_connection(connection_t *);
100 extern void connection_add(connection_t *);
101 extern void connection_del(connection_t *);
102 extern bool dump_connections(struct connection_t *);
103
104 #endif                                                  /* __TINC_CONNECTION_H__ */