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
35 #define OPTION_VERSION(x) ((x) >> 24) /* Top 8 bits are for protocol minor version */
37 typedef struct connection_status_t {
38 unsigned int pinged:1; /* sent ping */
39 unsigned int active:1; /* 1 if active.. */
40 unsigned int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
41 unsigned int termreq:1; /* the termination of this connection was requested */
42 unsigned int remove_unused:1; /* Set to 1 if you want this connection removed */
43 unsigned int timeout_unused:1; /* 1 if gotten timeout */
44 unsigned int encryptout:1; /* 1 if we can encrypt outgoing traffic */
45 unsigned int decryptin:1; /* 1 if we have to decrypt incoming traffic */
46 unsigned int mst:1; /* 1 if this connection is part of a minimum spanning tree */
47 unsigned int control:1; /* 1 if this is a control connection */
48 unsigned int pcap:1; /* 1 if this is a control connection requesting packet capture */
49 unsigned int log:1; /* 1 if this is a control connection requesting log dump */
50 unsigned int unused:20;
51 } connection_status_t;
59 typedef struct connection_t {
60 char *name; /* name he claims to have */
62 union sockaddr_t address; /* his real (internet) ip */
63 char *hostname; /* the hostname of its real ip */
64 int protocol_major; /* used protocol */
65 int protocol_minor; /* used protocol */
67 int socket; /* socket used for this connection */
68 uint32_t options; /* options for this connection */
69 connection_status_t status; /* status info */
70 int estimated_weight; /* estimation for the weight of the edge for this connection */
71 struct timeval start; /* time this connection was started, used for above estimation */
72 struct outgoing_t *outgoing; /* used to keep track of outgoing connections */
74 struct node_t *node; /* node associated with the other end */
75 struct edge_t *edge; /* edge associated with this connection */
77 rsa_t rsa; /* his public RSA key */
78 ecdsa_t ecdsa; /* his public ECDSA key */
79 cipher_t incipher; /* Cipher he will use to send data to us */
80 cipher_t outcipher; /* Cipher we will use to send data to him */
90 char *hischallenge; /* The challenge we sent to him */
92 struct buffer_t inbuf;
93 struct buffer_t outbuf;
94 struct event inevent; /* input event on this metadata connection */
95 struct event outevent; /* output event on this metadata connection */
96 int tcplen; /* length of incoming TCPpacket */
97 int allow_request; /* defined if there's only one request possible */
99 time_t last_ping_time; /* last time we saw some activity from the other end or pinged them */
101 splay_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
104 extern splay_tree_t *connection_tree;
105 extern connection_t *everyone;
107 extern void init_connections(void);
108 extern void exit_connections(void);
109 extern connection_t *new_connection(void) __attribute__ ((__malloc__));
110 extern void free_connection(connection_t *);
111 extern void free_connection_partially(connection_t *);
112 extern void connection_add(connection_t *);
113 extern void connection_del(connection_t *);
114 extern bool dump_connections(struct connection_t *);
116 #endif /* __TINC_CONNECTION_H__ */