2 connection.h -- header for connection.c
3 Copyright (C) 2000 Guus Sliepen <guus@sliepen.warande.net>,
4 2000 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 1.1.2.4 2001/01/05 23:53:49 guus Exp $
23 #ifndef __TINC_CONNECTION_H__
24 #define __TINC_CONNECTION_H__
30 #ifdef HAVE_OPENSSL_EVP_H
31 # include <openssl/evp.h>
36 #ifdef HAVE_OPENSSL_RSA_H
37 # include <openssl/rsa.h>
45 typedef struct status_bits_t {
46 int pinged:1; /* sent ping */
47 int meta:1; /* meta connection exists */
48 int active:1; /* 1 if active.. */
49 int outgoing:1; /* I myself asked for this conn */
50 int termreq:1; /* the termination of this connection was requested */
51 int remove:1; /* Set to 1 if you want this connection removed */
52 int timeout:1; /* 1 if gotten timeout */
53 int validkey:1; /* 1 if we currently have a valid key for him */
54 int waitingforkey:1; /* 1 if we already sent out a request */
55 int dataopen:1; /* 1 if we have a valid UDP connection open */
56 int encryptout:1; /* 1 if we can encrypt outgoing traffic */
57 int decryptin:1; /* 1 if we have to decrypt incoming traffic */
61 typedef struct option_bits_t {
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 unsigned int options; /* options turned on for this connection */
73 int flags; /* his flags */
74 int socket; /* our udp vpn socket */
75 int meta_socket; /* our tcp meta socket */
76 status_bits_t status; /* status info */
77 packet_queue_t *sq; /* pending outgoing packets */
78 packet_queue_t *rq; /* pending incoming packets (they have no
79 valid key to be decrypted with) */
80 RSA *rsa_key; /* the public/private key */
82 EVP_CIPHER_CTX *cipher_inctx; /* Context of encrypted meta data that will come from him to us */
83 EVP_CIPHER_CTX *cipher_outctx; /* Context of encrypted meta data that will be sent from us to him */
84 char *cipher_inkey; /* His symmetric meta key */
85 char *cipher_outkey; /* Our symmetric meta key */
87 EVP_CIPHER *cipher_pkttype; /* Cipher type for encrypted vpn packets */
88 char *cipher_pktkey; /* Cipher key and iv */
89 int cipher_pktkeylength; /* Cipher key and iv length*/
91 char *buffer; /* metadata input buffer */
92 int buflen; /* bytes read into buffer */
93 int reqlen; /* length of first request in buffer */
94 int allow_request; /* defined if there's only one request possible */
96 time_t last_ping_time; /* last time we saw some activity from the other end */
98 char *mychallenge; /* challenge we received from him */
99 char *hischallenge; /* challenge we sent to him */
101 struct connection_t *nexthop; /* nearest meta-hop in this direction */
103 avl_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this connection */
105 struct config_t *config; /* Pointer to configuration tree belonging to this host */
108 extern avl_tree_t *connection_tree;
109 extern connection_t *myself;
111 extern void init_connections(void);
112 extern connection_t *new_connection(void);
113 extern void free_connection(connection_t *);
114 extern void id_add(connection_t *);
115 extern void connection_add(connection_t *);
116 extern void connection_del(connection_t *);
117 extern connection_t *lookup_id(char *);
118 extern connection_t *lookup_connection(ipv4_t, short unsigned int);
119 extern void dump_connection_list(void);
120 extern int read_host_config(connection_t *);
121 extern void destroy_connection_tree(void);
122 extern void prune_connection_tree(void);
124 #endif /* __TINC_CONNECTION_H__ */