2 connection.h -- header for connection.c
3 Copyright (C) 2000-2003 Guus Sliepen <guus@sliepen.eu.org>,
4 2000-2003 Ivo Timmermans <ivo@o2w.nl>
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 1.1.2.40 2003/12/20 21:25:17 guus Exp $
23 #ifndef __TINC_CONNECTION_H__
24 #define __TINC_CONNECTION_H__
26 #include <openssl/rsa.h>
27 #include <openssl/evp.h>
31 #define OPTION_INDIRECT 0x0001
32 #define OPTION_TCPONLY 0x0002
33 #define OPTION_PMTU_DISCOVERY 0x0004
35 typedef struct connection_status_t {
36 int pinged:1; /* sent ping */
37 int active:1; /* 1 if active.. */
38 int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
39 int termreq:1; /* the termination of this connection was requested */
40 int remove:1; /* Set to 1 if you want this connection removed */
41 int timeout:1; /* 1 if gotten timeout */
42 int encryptout:1; /* 1 if we can encrypt outgoing traffic */
43 int decryptin:1; /* 1 if we have to decrypt incoming traffic */
44 int mst:1; /* 1 if this connection is part of a minimum spanning tree */
46 } connection_status_t;
53 typedef struct connection_t {
54 char *name; /* name he claims to have */
56 union sockaddr_t address; /* his real (internet) ip */
57 char *hostname; /* the hostname of its real ip */
58 int protocol_version; /* used protocol */
60 int socket; /* socket used for this connection */
61 long int options; /* options for this connection */
62 struct connection_status_t status; /* status info */
63 int estimated_weight; /* estimation for the weight of the edge for this connection */
64 struct timeval start; /* time this connection was started, used for above estimation */
65 struct outgoing_t *outgoing; /* used to keep track of outgoing connections */
67 struct node_t *node; /* node associated with the other end */
68 struct edge_t *edge; /* edge associated with this connection */
70 RSA *rsa_key; /* his public/private key */
71 const EVP_CIPHER *incipher; /* Cipher he will use to send data to us */
72 const EVP_CIPHER *outcipher; /* Cipher we will use to send data to him */
73 EVP_CIPHER_CTX *inctx; /* Context of encrypted meta data that will come from him to us */
74 EVP_CIPHER_CTX *outctx; /* Context of encrypted meta data that will be sent from us to him */
75 char *inkey; /* His symmetric meta key + iv */
76 char *outkey; /* Our symmetric meta key + iv */
77 int inkeylength; /* Length of his key + iv */
78 int outkeylength; /* Length of our key + iv */
79 const EVP_MD *indigest;
80 const EVP_MD *outdigest;
85 char *mychallenge; /* challenge we received from him */
86 char *hischallenge; /* challenge we sent to him */
88 char buffer[MAXBUFSIZE]; /* metadata input buffer */
89 int buflen; /* bytes read into buffer */
90 int reqlen; /* length of incoming request */
91 int tcplen; /* length of incoming TCPpacket */
92 int allow_request; /* defined if there's only one request possible */
94 time_t last_ping_time; /* last time we saw some activity from the other end */
96 avl_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
99 extern avl_tree_t *connection_tree;
100 extern connection_t *broadcast;
102 extern void init_connections(void);
103 extern void exit_connections(void);
104 extern connection_t *new_connection(void) __attribute__ ((__malloc__));
105 extern void free_connection(connection_t *);
106 extern void connection_add(connection_t *);
107 extern void connection_del(connection_t *);
108 extern void dump_connections(void);
109 extern bool read_connection_config(connection_t *);
111 #endif /* __TINC_CONNECTION_H__ */