2 connection.h -- header for connection.c
3 Copyright (C) 2000-2002 Guus Sliepen <guus@sliepen.warande.net>,
4 2000-2002 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 2002/04/28 12:46:25 zarq Exp $
23 #ifndef __TINC_CONNECTION_H__
24 #define __TINC_CONNECTION_H__
32 # ifdef HAVE_OPENSSL_EVP_H
33 # include <openssl/evp.h>
38 # ifdef HAVE_OPENSSL_RSA_H
39 # include <openssl/rsa.h>
43 #endif /* USE_OPENSSL */
55 #define OPTION_INDIRECT 0x0001
56 #define OPTION_TCPONLY 0x0002
58 typedef struct connection_status_t {
59 int pinged:1; /* sent ping */
60 int active:1; /* 1 if active.. */
61 int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
62 int termreq:1; /* the termination of this connection was requested */
63 int remove:1; /* Set to 1 if you want this connection removed */
64 int timeout:1; /* 1 if gotten timeout */
65 int encryptout:1; /* 1 if we can encrypt outgoing traffic */
66 int decryptin:1; /* 1 if we have to decrypt incoming traffic */
67 int mst:1; /* 1 if this connection is part of a minimum spanning tree */
69 } connection_status_t;
71 typedef struct connection_t {
72 char *name; /* name he claims to have */
74 sockaddr_t address; /* his real (internet) ip */
75 char *hostname; /* the hostname of its real ip */
76 int protocol_version; /* used protocol */
78 int socket; /* socket used for this connection */
79 long int options; /* options for this connection */
80 struct connection_status_t status; /* status info */
81 int estimated_weight; /* estimation for the weight of the edge for this connection */
82 struct timeval start; /* time this connection was started, used for above estimation */
83 struct outgoing_t *outgoing; /* used to keep track of outgoing connections */
85 struct node_t *node; /* node associated with the other end */
86 struct edge_t *edge; /* edge associated with this connection */
89 RSA *rsa_key; /* his public/private key */
90 const EVP_CIPHER *incipher; /* Cipher he will use to send data to us */
91 const EVP_CIPHER *outcipher; /* Cipher we will use to send data to him */
92 EVP_CIPHER_CTX *inctx; /* Context of encrypted meta data that will come from him to us */
93 EVP_CIPHER_CTX *outctx; /* Context of encrypted meta data that will be sent from us to him */
94 const EVP_MD *indigest;
95 const EVP_MD *outdigest;
100 GCRY_CIPHER_HD incipher;
101 GCRY_CIPHER_HD outcipher;
102 GCRY_CIPHER_HD inctx;
103 GCRY_CIPHER_HD outctx;
105 GCRY_MD_HD outdigest;
109 char *inkey; /* His symmetric meta key + iv */
110 char *outkey; /* Our symmetric meta key + iv */
111 int inkeylength; /* Length of his key + iv */
112 int outkeylength; /* Length of our key + iv */
117 char *mychallenge; /* challenge we received from him */
118 char *hischallenge; /* challenge we sent to him */
120 char buffer[MAXBUFSIZE]; /* metadata input buffer */
121 int buflen; /* bytes read into buffer */
122 int tcplen; /* length of incoming TCPpacket */
123 int allow_request; /* defined if there's only one request possible */
125 time_t last_ping_time; /* last time we saw some activity from the other end */
127 avl_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
130 extern avl_tree_t *connection_tree;
132 extern void init_connections(void);
133 extern void exit_connections(void);
134 extern connection_t *new_connection(void);
135 extern void free_connection(connection_t *);
136 extern void connection_add(connection_t *);
137 extern void connection_del(connection_t *);
138 extern void dump_connections(void);
139 extern int read_connection_config(connection_t *);
141 #endif /* __TINC_CONNECTION_H__ */