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 1.1.2.23 2001/11/16 12:01:48 zarq 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>
52 #define OPTION_INDIRECT 0x0001
53 #define OPTION_TCPONLY 0x0002
55 typedef struct connection_status_t {
56 int pinged:1; /* sent ping */
57 int active:1; /* 1 if active.. */
58 int outgoing:1; /* I myself asked for this conn */
59 int termreq:1; /* the termination of this connection was requested */
60 int remove:1; /* Set to 1 if you want this connection removed */
61 int timeout:1; /* 1 if gotten timeout */
62 int encryptout:1; /* 1 if we can encrypt outgoing traffic */
63 int decryptin:1; /* 1 if we have to decrypt incoming traffic */
64 int mst:1; /* 1 if this connection is part of a minimum spanning tree */
66 } connection_status_t;
68 typedef struct connection_t {
69 char *name; /* name he claims to have */
71 struct addrinfo *address; /* his real (internet) ip */
72 char *port; /* port number of meta connection */
73 char *hostname; /* the hostname of its real ip */
74 int protocol_version; /* used protocol */
76 int socket; /* socket used for this connection */
77 long int options; /* options for this connection */
78 struct connection_status_t status; /* status info */
79 int estimated_weight; /* estimation for the weight of the edge for this connection */
80 struct timeval start; /* time this connection was started, used for above estimation */
82 struct node_t *node; /* node associated with the other end */
83 struct edge_t *edge; /* edge associated with this connection */
85 RSA *rsa_key; /* his public/private key */
86 EVP_CIPHER *incipher; /* Cipher he will use to send data to us */
87 EVP_CIPHER *outcipher; /* Cipher we will use to send data to him */
88 EVP_CIPHER_CTX *inctx; /* Context of encrypted meta data that will come from him to us */
89 EVP_CIPHER_CTX *outctx; /* Context of encrypted meta data that will be sent from us to him */
90 char *inkey; /* His symmetric meta key + iv */
91 char *outkey; /* Our symmetric meta key + iv */
92 int inkeylength; /* Length of his key + iv */
93 int outkeylength; /* Length of our key + iv */
94 char *mychallenge; /* challenge we received from him */
95 char *hischallenge; /* challenge we sent to him */
97 char buffer[MAXBUFSIZE]; /* metadata input buffer */
98 int buflen; /* bytes read into buffer */
99 int tcplen; /* length of incoming TCPpacket */
100 int allow_request; /* defined if there's only one request possible */
102 time_t last_ping_time; /* last time we saw some activity from the other end */
104 avl_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
107 extern avl_tree_t *connection_tree;
109 extern void init_connections(void);
110 extern void exit_connections(void);
111 extern connection_t *new_connection(void);
112 extern void free_connection(connection_t *);
113 extern void connection_add(connection_t *);
114 extern void connection_del(connection_t *);
115 extern connection_t *lookup_connection(struct addrinfo *);
116 extern void dump_connections(void);
117 extern int read_connection_config(connection_t *);
119 #endif /* __TINC_CONNECTION_H__ */