2 connection.h -- header for connection.c
3 Copyright (C) 2000-2002 Guus Sliepen <guus@sliepen.eu.org>,
4 2000-2002 Ivo Timmermans <ivo@o2w.nl>
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 1.1.2.32 2003/07/06 23:16:28 guus Exp $
23 #ifndef __TINC_CONNECTION_H__
24 #define __TINC_CONNECTION_H__
31 #ifdef HAVE_OPENSSL_EVP_H
32 # include <openssl/evp.h>
37 #ifdef HAVE_OPENSSL_RSA_H
38 # include <openssl/rsa.h>
49 #define OPTION_INDIRECT 0x0001
50 #define OPTION_TCPONLY 0x0002
52 typedef struct connection_status_t {
53 int pinged:1; /* sent ping */
54 int active:1; /* 1 if active.. */
55 int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
56 int termreq:1; /* the termination of this connection was requested */
57 int remove:1; /* Set to 1 if you want this connection removed */
58 int timeout:1; /* 1 if gotten timeout */
59 int encryptout:1; /* 1 if we can encrypt outgoing traffic */
60 int decryptin:1; /* 1 if we have to decrypt incoming traffic */
61 int mst:1; /* 1 if this connection is part of a minimum spanning tree */
63 } connection_status_t;
65 typedef struct connection_t {
66 char *name; /* name he claims to have */
68 sockaddr_t address; /* his real (internet) ip */
69 char *hostname; /* the hostname of its real ip */
70 int protocol_version; /* used protocol */
72 int socket; /* socket used for this connection */
73 long int options; /* options for this connection */
74 struct connection_status_t status; /* status info */
75 int estimated_weight; /* estimation for the weight of the edge for this connection */
76 struct timeval start; /* time this connection was started, used for above estimation */
77 struct outgoing_t *outgoing; /* used to keep track of outgoing connections */
79 struct node_t *node; /* node associated with the other end */
80 struct edge_t *edge; /* edge associated with this connection */
82 RSA *rsa_key; /* his public/private key */
83 const EVP_CIPHER *incipher; /* Cipher he will use to send data to us */
84 const EVP_CIPHER *outcipher; /* Cipher we will use to send data to him */
85 EVP_CIPHER_CTX *inctx; /* Context of encrypted meta data that will come from him to us */
86 EVP_CIPHER_CTX *outctx; /* Context of encrypted meta data that will be sent from us to him */
87 char *inkey; /* His symmetric meta key + iv */
88 char *outkey; /* Our symmetric meta key + iv */
89 int inkeylength; /* Length of his key + iv */
90 int outkeylength; /* Length of our key + iv */
91 const EVP_MD *indigest;
92 const EVP_MD *outdigest;
97 char *mychallenge; /* challenge we received from him */
98 char *hischallenge; /* challenge we sent to him */
100 char buffer[MAXBUFSIZE]; /* metadata input buffer */
101 int buflen; /* bytes read into buffer */
102 int reqlen; /* length of incoming request */
103 int tcplen; /* length of incoming TCPpacket */
104 int allow_request; /* defined if there's only one request possible */
106 time_t last_ping_time; /* last time we saw some activity from the other end */
108 avl_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
111 extern avl_tree_t *connection_tree;
112 extern connection_t *broadcast;
114 extern void init_connections(void);
115 extern void exit_connections(void);
116 extern connection_t *new_connection(void) __attribute__ ((malloc));
117 extern void free_connection(connection_t *);
118 extern void connection_add(connection_t *);
119 extern void connection_del(connection_t *);
120 extern void dump_connections(void);
121 extern int read_connection_config(connection_t *);
123 #endif /* __TINC_CONNECTION_H__ */