2 connection.h -- header for connection.c
3 Copyright (C) 2000-2010 Guus Sliepen <guus@tinc-vpn.org>,
4 2000-2005 Ivo Timmermans
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 along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #ifndef __TINC_CONNECTION_H__
22 #define __TINC_CONNECTION_H__
27 #include "splay_tree.h"
29 #define OPTION_INDIRECT 0x0001
30 #define OPTION_TCPONLY 0x0002
31 #define OPTION_PMTU_DISCOVERY 0x0004
32 #define OPTION_CLAMP_MSS 0x0008
34 typedef struct connection_status_t {
35 int pinged:1; /* sent ping */
36 int active:1; /* 1 if active.. */
37 int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
38 int termreq:1; /* the termination of this connection was requested */
39 int remove_unused:1; /* Set to 1 if you want this connection removed */
40 int timeout_unused:1; /* 1 if gotten timeout */
41 int encryptout:1; /* 1 if we can encrypt outgoing traffic */
42 int decryptin:1; /* 1 if we have to decrypt incoming traffic */
43 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 uint32_t options; /* options for this connection */
62 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_t rsa; /* his public/private key */
71 cipher_t incipher; /* Cipher he will use to send data to us */
72 cipher_t outcipher; /* Cipher we will use to send data to him */
81 char *hischallenge; /* The challenge we sent to him */
83 struct bufferevent *buffer; /* buffer events on this metadata connection */
84 struct event inevent; /* input event on this metadata connection */
85 int tcplen; /* length of incoming TCPpacket */
86 int allow_request; /* defined if there's only one request possible */
88 time_t last_ping_time; /* last time we saw some activity from the other end or pinged them */
90 splay_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
93 extern splay_tree_t *connection_tree;
94 extern connection_t *broadcast;
96 extern void init_connections(void);
97 extern void exit_connections(void);
98 extern connection_t *new_connection(void) __attribute__ ((__malloc__));
99 extern void free_connection(connection_t *);
100 extern void connection_add(connection_t *);
101 extern void connection_del(connection_t *);
102 extern bool dump_connections(struct connection_t *);
104 #endif /* __TINC_CONNECTION_H__ */