2 connection.h -- header for connection.c
3 Copyright (C) 2000-2013 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__
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 unused_active:1;
40 unsigned int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
41 unsigned int unused_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 invitation:1; /* 1 if this is an invitation */
51 unsigned int invitation_used:1; /* 1 if the invitation has been consumed */
52 unsigned int unused:18;
53 } connection_status_t;
60 typedef struct connection_t {
61 char *name; /* name he claims to have */
62 char *hostname; /* the hostname of its real ip */
64 union sockaddr_t address; /* his real (internet) ip */
65 int protocol_major; /* used protocol */
66 int protocol_minor; /* used protocol */
68 int socket; /* socket used for this connection */
69 uint32_t options; /* options for this connection */
70 connection_status_t status; /* status info */
71 int estimated_weight; /* estimation for the weight of the edge for this connection */
72 struct timeval start; /* time this connection was started, used for above estimation */
73 struct outgoing_t *outgoing; /* used to keep track of outgoing connections */
75 struct node_t *node; /* node associated with the other end */
76 struct edge_t *edge; /* edge associated with this connection */
78 #ifndef DISABLE_LEGACY
79 rsa_t *rsa; /* his public RSA key */
80 cipher_t *incipher; /* Cipher he will use to send data to us */
81 cipher_t *outcipher; /* Cipher we will use to send data to him */
86 ecdsa_t *ecdsa; /* his public ECDSA key */
94 char *hischallenge; /* The challenge we sent to him */
96 struct buffer_t inbuf;
97 struct buffer_t outbuf;
98 io_t io; /* input/output event on this metadata connection */
99 int tcplen; /* length of incoming TCPpacket */
100 int sptpslen; /* length of incoming SPTPS packet */
101 int allow_request; /* defined if there's only one request possible */
103 time_t last_ping_time; /* last time we saw some activity from the other end or pinged them */
105 splay_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
108 extern list_t *connection_list;
109 extern connection_t *everyone;
111 extern void init_connections(void);
112 extern void exit_connections(void);
113 extern connection_t *new_connection(void) __attribute__ ((__malloc__));
114 extern void free_connection(connection_t *);
115 extern void connection_add(connection_t *);
116 extern void connection_del(connection_t *);
117 extern bool dump_connections(struct connection_t *);
119 #endif /* __TINC_CONNECTION_H__ */