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 1.1.2.16 2001/10/10 20:35:10 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 typedef struct status_bits_t {
50 int pinged:1; /* sent ping */
51 int meta:1; /* meta connection exists */
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 validkey:1; /* 1 if we currently have a valid key for him */
58 int waitingforkey:1; /* 1 if we already sent out a request */
59 int dataopen:1; /* 1 if we have a valid UDP connection open */
60 int encryptout:1; /* 1 if we can encrypt outgoing traffic */
61 int decryptin:1; /* 1 if we have to decrypt incoming traffic */
65 #define OPTION_INDIRECT 0x0001
66 #define OPTION_TCPONLY 0x0002
68 typedef struct connection_t {
69 ipv4_t address; /* his real (internet) ip */
70 short unsigned int port; /* port number of meta connection */
71 char *hostname; /* the hostname of its real ip */
72 int protocol_version; /* used protocol */
74 int socket; /* socket used for this connection */
75 long int options; /* options for this connection */
76 status_bits_t status; /* status info */
78 struct node_t *node; /* node associated with the other end */
79 struct vertex_t *vertex; /* vertex associated with this connection */
81 RSA *rsa_key; /* his public/private key */
82 EVP_CIPHER *incipher; /* Cipher he will use to send data to us */
83 EVP_CIPHER *outcipher; /* Cipher we will use to send data to him */
84 EVP_CIPHER_CTX *inctx; /* Context of encrypted meta data that will come from him to us */
85 EVP_CIPHER_CTX *outctx; /* Context of encrypted meta data that will be sent from us to him */
86 char *inkey; /* His symmetric meta key + iv */
87 char *outkey; /* Our symmetric meta key + iv */
88 int inkeylength; /* Length of his key + iv */
89 int outkeylength; /* Length of our key + iv */
90 char *mychallenge; /* challenge we received from him */
91 char *hischallenge; /* challenge we sent to him */
93 char buffer[MAXBUFSIZE]; /* metadata input buffer */
94 int buflen; /* bytes read into buffer */
95 int tcplen; /* length of incoming TCPpacket */
96 int allow_request; /* defined if there's only one request possible */
98 time_t last_ping_time; /* last time we saw some activity from the other end */
101 extern avl_tree_t *connection_tree;
103 #endif /* __TINC_CONNECTION_H__ */