1 #ifndef TINC_CONNECTION_H
2 #define TINC_CONNECTION_H
5 connection.h -- header for connection.c
6 Copyright (C) 2000-2013 Guus Sliepen <guus@tinc-vpn.org>,
7 2000-2005 Ivo Timmermans
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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 bool pinged: 1; /* sent ping */
39 bool unused_active: 1;
40 bool connecting: 1; /* 1 if we are waiting for a non-blocking connect() to finish */
41 bool unused_termreq: 1; /* the termination of this connection was requested */
42 bool remove_unused: 1; /* Set to 1 if you want this connection removed */
43 bool timeout_unused: 1; /* 1 if gotten timeout */
44 bool encryptout: 1; /* 1 if we can encrypt outgoing traffic */
45 bool decryptin: 1; /* 1 if we have to decrypt incoming traffic */
46 bool mst: 1; /* 1 if this connection is part of a minimum spanning tree */
47 bool control: 1; /* 1 if this is a control connection */
48 bool pcap: 1; /* 1 if this is a control connection requesting packet capture */
49 bool log: 1; /* 1 if this is a control connection requesting log dump */
50 bool invitation: 1; /* 1 if this is an invitation */
51 bool invitation_used: 1; /* 1 if the invitation has been consumed */
52 bool tarpit: 1; /* 1 if the connection should be added to the tarpit */
54 } connection_status_t;
61 typedef struct connection_t {
62 char *name; /* name he claims to have */
63 char *hostname; /* the hostname of its real ip */
65 union sockaddr_t address; /* his real (internet) ip */
66 int protocol_major; /* used protocol */
67 int protocol_minor; /* used protocol */
69 int socket; /* socket used for this connection */
70 uint32_t options; /* options for this connection */
71 connection_status_t status; /* status info */
72 int estimated_weight; /* estimation for the weight of the edge for this connection */
73 struct timeval start; /* time this connection was started, used for above estimation */
74 struct outgoing_t *outgoing; /* used to keep track of outgoing connections */
76 struct node_t *node; /* node associated with the other end */
77 struct edge_t *edge; /* edge associated with this connection */
79 #ifndef DISABLE_LEGACY
80 rsa_t *rsa; /* his public RSA key */
81 cipher_t *incipher; /* Cipher he will use to send data to us */
82 cipher_t *outcipher; /* Cipher we will use to send data to him */
89 ecdsa_t *ecdsa; /* his public ECDSA key */
93 int outcompression; /* compression level from compression_level_t */
95 uint8_t *hischallenge; /* The challenge we sent to him */
96 uint8_t *mychallenge; /* The challenge we received */
98 struct buffer_t inbuf;
99 struct buffer_t outbuf;
100 io_t io; /* input/output event on this metadata connection */
101 int tcplen; /* length of incoming TCPpacket */
102 int sptpslen; /* length of incoming SPTPS packet */
103 int allow_request; /* defined if there's only one request possible */
105 time_t last_ping_time; /* last time we saw some activity from the other end or pinged them */
107 splay_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
110 extern list_t connection_list;
111 extern connection_t *everyone;
113 extern void init_connections(void);
114 extern void exit_connections(void);
115 extern connection_t *new_connection(void) __attribute__((__malloc__));
116 extern void free_connection(connection_t *c);
117 extern void connection_add(connection_t *c);
118 extern void connection_del(connection_t *c);
119 extern bool dump_connections(struct connection_t *c);