2 node.h -- header for node.c
3 Copyright (C) 2001-2013 Guus Sliepen <guus@tinc-vpn.org>,
4 2001-2005 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_NODE_H__
22 #define __TINC_NODE_H__
24 #include "splay_tree.h"
26 #include "connection.h"
31 typedef struct node_status_t {
32 unsigned int unused_active:1; /* 1 if active (not used for nodes) */
33 unsigned int validkey:1; /* 1 if we currently have a valid key for him */
34 unsigned int waitingforkey:1; /* 1 if we already sent out a request */
35 unsigned int visited:1; /* 1 if this node has been visited by one of the graph algorithms */
36 unsigned int reachable:1; /* 1 if this node is reachable in the graph */
37 unsigned int indirect:1; /* 1 if this node is not directly reachable by us */
38 unsigned int sptps:1; /* 1 if this node supports SPTPS */
39 unsigned int udp_confirmed:1; /* 1 if the address is one that we received UDP traffic on */
40 unsigned int send_locally:1; /* 1 if the next UDP packet should be sent on the local network */
41 unsigned int unused:23;
44 typedef struct node_t {
45 char *name; /* name of this node */
46 node_id_t id; /* unique node ID (name hash) */
47 uint32_t options; /* options turned on for this node */
49 int sock; /* Socket to use for outgoing UDP packets */
50 sockaddr_t address; /* his real (internet) ip to send UDP packets to */
51 char *hostname; /* the hostname of its real ip */
54 time_t last_state_change;
57 ecdsa_t *ecdsa; /* His public ECDSA key */
60 #ifndef DISABLE_LEGACY
61 cipher_t *incipher; /* Cipher for UDP packets */
62 digest_t *indigest; /* Digest for UDP packets */
64 cipher_t *outcipher; /* Cipher for UDP packets */
65 digest_t *outdigest; /* Digest for UDP packets */
68 int incompression; /* Compressionlevel, 0 = no compression */
69 int outcompression; /* Compressionlevel, 0 = no compression */
72 struct node_t *nexthop; /* nearest node from us to him */
73 struct edge_t *prevedge; /* nearest node from him to us */
74 struct node_t *via; /* next hop for UDP packets */
76 splay_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this node */
78 splay_tree_t *edge_tree; /* Edges with this node as one of the endpoints */
80 struct connection_t *connection; /* Connection associated with this node (if a direct connection exists) */
82 uint32_t sent_seqno; /* Sequence number last sent to this node */
83 uint32_t received_seqno; /* Sequence number last received from this node */
84 uint32_t received; /* Total valid packets received from this node */
85 uint32_t prev_received_seqno;
86 uint32_t prev_received;
87 uint32_t farfuture; /* Packets in a row that have arrived from the far future */
88 unsigned char* late; /* Bitfield marking late packets */
90 struct timeval udp_ping_sent; /* Last time a ping probe was sent */
91 timeout_t udp_ping_timeout; /* Ping timeout event */
93 length_t mtu; /* Maximum size of packets to send to this node */
94 length_t minmtu; /* Probed minimum MTU */
95 length_t maxmtu; /* Probed maximum MTU */
96 int mtuprobes; /* Number of probes */
97 struct timeval probe_sent_time; /* Time the last probe was sent */
98 struct timeval probe_time; /* Time the last probe was sent or received */
99 int probe_counter; /* Number of probes received since last burst was sent */
100 float rtt; /* Last measured round trip time */
101 float packetloss; /* Last measured packet loss rate */
105 uint64_t out_packets;
109 extern struct node_t *myself;
110 extern splay_tree_t *node_tree;
112 extern void init_nodes(void);
113 extern void exit_nodes(void);
114 extern node_t *new_node(void) __attribute__ ((__malloc__));
115 extern void free_node(node_t *);
116 extern void node_add(node_t *);
117 extern void node_del(node_t *);
118 extern node_t *lookup_node(char *);
119 extern node_t *lookup_node_id(const node_id_t *);
120 extern node_t *lookup_node_udp(const sockaddr_t *);
121 extern bool dump_nodes(struct connection_t *);
122 extern bool dump_traffic(struct connection_t *);
123 extern void update_node_udp(node_t *, const sockaddr_t *);
125 #endif /* __TINC_NODE_H__ */