Only read our public key if it wasn't already in the private key file.
[tinc] / src / connection.h
1 /*
2     connection.h -- header for connection.c
3     Copyright (C) 2000-2003 Guus Sliepen <guus@sliepen.eu.org>,
4                   2000-2003 Ivo Timmermans <ivo@o2w.nl>
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: connection.h,v 1.1.2.40 2003/12/20 21:25:17 guus Exp $
21 */
22
23 #ifndef __TINC_CONNECTION_H__
24 #define __TINC_CONNECTION_H__
25
26 #include <openssl/rsa.h>
27 #include <openssl/evp.h>
28
29 #include "avl_tree.h"
30
31 #define OPTION_INDIRECT         0x0001
32 #define OPTION_TCPONLY          0x0002
33 #define OPTION_PMTU_DISCOVERY   0x0004
34
35 typedef struct connection_status_t {
36         int pinged:1;                           /* sent ping */
37         int active:1;                           /* 1 if active.. */
38         int connecting:1;                       /* 1 if we are waiting for a non-blocking connect() to finish */
39         int termreq:1;                          /* the termination of this connection was requested */
40         int remove:1;                           /* Set to 1 if you want this connection removed */
41         int timeout:1;                          /* 1 if gotten timeout */
42         int encryptout:1;                       /* 1 if we can encrypt outgoing traffic */
43         int decryptin:1;                        /* 1 if we have to decrypt incoming traffic */
44         int mst:1;                              /* 1 if this connection is part of a minimum spanning tree */
45         int unused:23;
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         long int options;                       /* options for this connection */
62         struct 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 *rsa_key;                           /* his public/private key */
71         const EVP_CIPHER *incipher;     /* Cipher he will use to send data to us */
72         const EVP_CIPHER *outcipher;    /* Cipher we will use to send data to him */
73         EVP_CIPHER_CTX *inctx;          /* Context of encrypted meta data that will come from him to us */
74         EVP_CIPHER_CTX *outctx;         /* Context of encrypted meta data that will be sent from us to him */
75         char *inkey;                            /* His symmetric meta key + iv */
76         char *outkey;                           /* Our symmetric meta key + iv */
77         int inkeylength;                        /* Length of his key + iv */
78         int outkeylength;                       /* Length of our key + iv */
79         const EVP_MD *indigest;
80         const EVP_MD *outdigest;
81         int inmaclength;
82         int outmaclength;
83         int incompression;
84         int outcompression;
85         char *mychallenge;                      /* challenge we received from him */
86         char *hischallenge;                     /* challenge we sent to him */
87
88         char buffer[MAXBUFSIZE];        /* metadata input buffer */
89         int buflen;                                     /* bytes read into buffer */
90         int reqlen;                                     /* length of incoming request */
91         int tcplen;                                     /* length of incoming TCPpacket */
92         int allow_request;                      /* defined if there's only one request possible */
93
94         time_t last_ping_time;          /* last time we saw some activity from the other end */
95
96         avl_tree_t *config_tree;        /* Pointer to configuration tree belonging to him */
97 } connection_t;
98
99 extern avl_tree_t *connection_tree;
100 extern connection_t *broadcast;
101
102 extern void init_connections(void);
103 extern void exit_connections(void);
104 extern connection_t *new_connection(void) __attribute__ ((__malloc__));
105 extern void free_connection(connection_t *);
106 extern void connection_add(connection_t *);
107 extern void connection_del(connection_t *);
108 extern void dump_connections(void);
109 extern bool read_connection_config(connection_t *);
110
111 #endif                                                  /* __TINC_CONNECTION_H__ */