2 connection.h -- header for connection.c
3 Copyright (C) 2000-2012 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__
28 #include "splay_tree.h"
31 #define OPTION_INDIRECT 0x0001
32 #define OPTION_TCPONLY 0x0002
33 #define OPTION_PMTU_DISCOVERY 0x0004
34 #define OPTION_CLAMP_MSS 0x0008
36 typedef struct connection_status_t {
37 unsigned int pinged:1; /* sent ping */
38 unsigned int active:1; /* 1 if active.. */
39 unsigned int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
40 unsigned int termreq:1; /* the termination of this connection was requested */
41 unsigned int remove_unused:1; /* Set to 1 if you want this connection removed */
42 unsigned int timeout_unused:1; /* 1 if gotten timeout */
43 unsigned int encryptout:1; /* 1 if we can encrypt outgoing traffic */
44 unsigned int decryptin:1; /* 1 if we have to decrypt incoming traffic */
45 unsigned int mst:1; /* 1 if this connection is part of a minimum spanning tree */
46 unsigned int control:1; /* 1 if this is a control connection */
47 unsigned int pcap:1; /* 1 if this is a control connection requesting packet capture */
48 unsigned int log:1; /* 1 if this is a control connection requesting log dump */
49 unsigned int unused:20;
50 } connection_status_t;
58 typedef struct connection_t {
59 char *name; /* name he claims to have */
61 union sockaddr_t address; /* his real (internet) ip */
62 char *hostname; /* the hostname of its real ip */
63 int protocol_major; /* used protocol */
64 int protocol_minor; /* used protocol */
66 int socket; /* socket used for this connection */
67 uint32_t options; /* options for this connection */
68 connection_status_t status; /* status info */
69 int estimated_weight; /* estimation for the weight of the edge for this connection */
70 struct timeval start; /* time this connection was started, used for above estimation */
71 struct outgoing_t *outgoing; /* used to keep track of outgoing connections */
73 struct node_t *node; /* node associated with the other end */
74 struct edge_t *edge; /* edge associated with this connection */
76 rsa_t rsa; /* his public RSA key */
77 ecdsa_t ecdsa; /* his public ECDSA key */
78 cipher_t incipher; /* Cipher he will use to send data to us */
79 cipher_t outcipher; /* Cipher we will use to send data to him */
89 char *hischallenge; /* The challenge we sent to him */
91 struct buffer_t inbuf;
92 struct buffer_t outbuf;
93 struct event inevent; /* input event on this metadata connection */
94 struct event outevent; /* output event on this metadata connection */
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 or pinged them */
100 splay_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
103 extern splay_tree_t *connection_tree;
104 extern connection_t *everyone;
106 extern void init_connections(void);
107 extern void exit_connections(void);
108 extern connection_t *new_connection(void) __attribute__ ((__malloc__));
109 extern void free_connection(connection_t *);
110 extern void free_connection_partially(connection_t *);
111 extern void connection_add(connection_t *);
112 extern void connection_del(connection_t *);
113 extern bool dump_connections(struct connection_t *);
115 #endif /* __TINC_CONNECTION_H__ */