Move RSA key generation into the wrappers.
[tinc] / src / connection.h
1 /*
2     connection.h -- header for connection.c
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 #ifndef __TINC_CONNECTION_H__
24 #define __TINC_CONNECTION_H__
25
26 #include "cipher.h"
27 #include "digest.h"
28 #include "rsa.h"
29 #include "splay_tree.h"
30
31 #define OPTION_INDIRECT         0x0001
32 #define OPTION_TCPONLY          0x0002
33 #define OPTION_PMTU_DISCOVERY   0x0004
34
35 typedef union connection_status_t {
36         struct {
37                 int pinged:1;                           /* sent ping */
38                 int active:1;                           /* 1 if active.. */
39                 int connecting:1;                       /* 1 if we are waiting for a non-blocking connect() to finish */
40                 int termreq:1;                          /* the termination of this connection was requested */
41                 int remove_unused:1;                            /* Set to 1 if you want this connection removed */
42                 int timeout_unused:1;                           /* 1 if gotten timeout */
43                 int encryptout:1;                       /* 1 if we can encrypt outgoing traffic */
44                 int decryptin:1;                        /* 1 if we have to decrypt incoming traffic */
45                 int mst:1;                              /* 1 if this connection is part of a minimum spanning tree */
46                 int unused:23;
47         };
48         uint32_t value;
49 } connection_status_t;
50
51 #include "edge.h"
52 #include "list.h"
53 #include "net.h"
54 #include "node.h"
55
56 typedef struct connection_t {
57         char *name;                                     /* name he claims to have */
58
59         union sockaddr_t address;                       /* his real (internet) ip */
60         char *hostname;                         /* the hostname of its real ip */
61         int protocol_version;           /* used protocol */
62
63         int socket;                                     /* socket used for this connection */
64         long int options;                       /* options for this connection */
65         connection_status_t status;     /* status info */
66         int estimated_weight;           /* estimation for the weight of the edge for this connection */
67         struct timeval start;           /* time this connection was started, used for above estimation */
68         struct outgoing_t *outgoing;    /* used to keep track of outgoing connections */
69
70         struct node_t *node;            /* node associated with the other end */
71         struct edge_t *edge;            /* edge associated with this connection */
72
73         rsa_t rsa;                      /* his public/private key */
74         cipher_t incipher;              /* Cipher he will use to send data to us */
75         cipher_t outcipher;             /* Cipher we will use to send data to him */
76         digest_t indigest;
77         digest_t outdigest;
78
79         int inmaclength;
80         int outmaclength;
81         int incompression;
82         int outcompression;
83
84         char *hischallenge;             /* The challenge we sent to him */
85
86         struct bufferevent *buffer;                     /* buffer events on this metadata connection */
87         struct event inevent;                           /* input event on this metadata connection */
88         int tcplen;                                     /* length of incoming TCPpacket */
89         int allow_request;                      /* defined if there's only one request possible */
90
91         time_t last_ping_time;          /* last time we saw some activity from the other end or pinged them */
92
93         splay_tree_t *config_tree;      /* Pointer to configuration tree belonging to him */
94 } connection_t;
95
96 extern splay_tree_t *connection_tree;
97 extern connection_t *broadcast;
98
99 extern void init_connections(void);
100 extern void exit_connections(void);
101 extern connection_t *new_connection(void) __attribute__ ((__malloc__));
102 extern void free_connection(connection_t *);
103 extern void connection_add(connection_t *);
104 extern void connection_del(connection_t *);
105 extern int dump_connections(struct evbuffer *);
106 extern bool read_connection_config(connection_t *);
107
108 #endif                                                  /* __TINC_CONNECTION_H__ */