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 1.1.2.9 2001/05/25 11:54:28 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>
46 typedef struct status_bits_t {
47 int pinged:1; /* sent ping */
48 int meta:1; /* meta connection exists */
49 int active:1; /* 1 if active.. */
50 int outgoing:1; /* I myself asked for this conn */
51 int termreq:1; /* the termination of this connection was requested */
52 int remove:1; /* Set to 1 if you want this connection removed */
53 int timeout:1; /* 1 if gotten timeout */
54 int validkey:1; /* 1 if we currently have a valid key for him */
55 int waitingforkey:1; /* 1 if we already sent out a request */
56 int dataopen:1; /* 1 if we have a valid UDP connection open */
57 int encryptout:1; /* 1 if we can encrypt outgoing traffic */
58 int decryptin:1; /* 1 if we have to decrypt incoming traffic */
62 #define OPTION_INDIRECT 0x0001
63 #define OPTION_TCPONLY 0x0002
65 typedef struct connection_t {
66 char *name; /* name of this connection */
67 ipv4_t address; /* his real (internet) ip */
68 char *hostname; /* the hostname of its real ip */
69 int protocol_version; /* used protocol */
70 short unsigned int port; /* port number for UDP traffic */
71 long int options; /* options turned on for this connection */
73 int socket; /* our udp vpn socket */
74 int meta_socket; /* our tcp meta socket */
75 status_bits_t status; /* status info */
77 RSA *rsa_key; /* the public/private key */
78 EVP_CIPHER_CTX *cipher_inctx; /* Context of encrypted meta data that will come from him to us */
79 EVP_CIPHER_CTX *cipher_outctx; /* Context of encrypted meta data that will be sent from us to him */
80 char *cipher_inkey; /* His symmetric meta key */
81 char *cipher_outkey; /* Our symmetric meta key */
82 EVP_CIPHER *cipher_pkttype; /* Cipher type for encrypted vpn packets */
83 char *cipher_pktkey; /* Cipher key and iv */
84 int cipher_pktkeylength; /* Cipher key and iv length*/
86 char *buffer; /* metadata input buffer */
87 int buflen; /* bytes read into buffer */
88 int tcplen; /* length of incoming TCPpacket */
89 int allow_request; /* defined if there's only one request possible */
91 time_t last_ping_time; /* last time we saw some activity from the other end */
93 list_t *queue; /* Queue for packets awaiting to be encrypted */
95 char *mychallenge; /* challenge we received from him */
96 char *hischallenge; /* challenge we sent to him */
98 struct connection_t *nexthop; /* nearest meta-hop in this direction */
100 avl_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this connection */
102 struct config_t *config; /* Pointer to configuration tree belonging to this host */
105 extern avl_tree_t *connection_tree;
106 extern connection_t *myself;
108 extern void init_connections(void);
109 extern connection_t *new_connection(void);
110 extern void free_connection(connection_t *);
111 extern void id_add(connection_t *);
112 extern void connection_add(connection_t *);
113 extern void connection_del(connection_t *);
114 extern connection_t *lookup_id(char *);
115 extern connection_t *lookup_connection(ipv4_t, short unsigned int);
116 extern void dump_connection_list(void);
117 extern int read_host_config(connection_t *);
118 extern void destroy_connection_tree(void);
119 extern void prune_connection_tree(void);
121 #endif /* __TINC_CONNECTION_H__ */