2 connection.h -- header for connection.c
3 Copyright (C) 2000,2001 Guus Sliepen <guus@sliepen.warande.net>,
4 2000,2001 Ivo Timmermans <itimmermans@bigfoot.com>
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.
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.
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.
20 $Id: connection.h,v 1.1.2.18 2001/10/28 08:41:19 guus Exp $
23 #ifndef __TINC_CONNECTION_H__
24 #define __TINC_CONNECTION_H__
29 #ifdef HAVE_OPENSSL_EVP_H
30 # include <openssl/evp.h>
35 #ifdef HAVE_OPENSSL_RSA_H
36 # include <openssl/rsa.h>
47 #define OPTION_INDIRECT 0x0001
48 #define OPTION_TCPONLY 0x0002
50 typedef struct connection_status_t {
51 int pinged:1; /* sent ping */
52 int active:1; /* 1 if active.. */
53 int outgoing:1; /* I myself asked for this conn */
54 int termreq:1; /* the termination of this connection was requested */
55 int remove:1; /* Set to 1 if you want this connection removed */
56 int timeout:1; /* 1 if gotten timeout */
57 int encryptout:1; /* 1 if we can encrypt outgoing traffic */
58 int decryptin:1; /* 1 if we have to decrypt incoming traffic */
60 } connection_status_t;
62 typedef struct connection_t {
63 char *name; /* name he claims to have */
65 ipv4_t address; /* his real (internet) ip */
66 short unsigned int port; /* port number of meta connection */
67 char *hostname; /* the hostname of its real ip */
68 int protocol_version; /* used protocol */
70 int socket; /* socket used for this connection */
71 long int options; /* options for this connection */
72 struct connection_status_t status; /* status info */
74 struct node_t *node; /* node associated with the other end */
75 struct edge_t *edge; /* edge associated with this connection */
77 RSA *rsa_key; /* his public/private key */
78 EVP_CIPHER *incipher; /* Cipher he will use to send data to us */
79 EVP_CIPHER *outcipher; /* Cipher we will use to send data to him */
80 EVP_CIPHER_CTX *inctx; /* Context of encrypted meta data that will come from him to us */
81 EVP_CIPHER_CTX *outctx; /* Context of encrypted meta data that will be sent from us to him */
82 char *inkey; /* His symmetric meta key + iv */
83 char *outkey; /* Our symmetric meta key + iv */
84 int inkeylength; /* Length of his key + iv */
85 int outkeylength; /* Length of our key + iv */
86 char *mychallenge; /* challenge we received from him */
87 char *hischallenge; /* challenge we sent to him */
89 char buffer[MAXBUFSIZE]; /* metadata input buffer */
90 int buflen; /* bytes read into buffer */
91 int tcplen; /* length of incoming TCPpacket */
92 int allow_request; /* defined if there's only one request possible */
94 time_t last_ping_time; /* last time we saw some activity from the other end */
96 avl_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
99 extern avl_tree_t *connection_tree;
101 extern void init_connections(void);
102 extern void exit_connection(void);
103 extern connection_t *new_connection(void);
104 extern void free_connection(connection_t *);
105 extern void connection_add(connection_t *);
106 extern void connection_del(connection_t *);
107 extern connection_t *lookup_connection(ipv4_t, short unsigned int);
108 extern void dump_connections(void);
109 extern int read_connection_config(connection_t *);
111 #endif /* __TINC_CONNECTION_H__ */