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 validkey_in; /* 1 if we have sent a valid key to him */
42 unsigned int unused:22;
45 typedef struct node_t {
46 char *name; /* name of this node */
47 node_id_t id; /* unique node ID (name hash) */
48 uint32_t options; /* options turned on for this node */
50 int sock; /* Socket to use for outgoing UDP packets */
51 sockaddr_t address; /* his real (internet) ip to send UDP packets to */
52 char *hostname; /* the hostname of its real ip */
55 time_t last_state_change;
58 ecdsa_t *ecdsa; /* His public ECDSA key */
61 #ifndef DISABLE_LEGACY
62 cipher_t *incipher; /* Cipher for UDP packets */
63 digest_t *indigest; /* Digest for UDP packets */
65 cipher_t *outcipher; /* Cipher for UDP packets */
66 digest_t *outdigest; /* Digest for UDP packets */
69 int incompression; /* Compressionlevel, 0 = no compression */
70 int outcompression; /* Compressionlevel, 0 = no compression */
73 struct node_t *nexthop; /* nearest node from us to him */
74 struct edge_t *prevedge; /* nearest node from him to us */
75 struct node_t *via; /* next hop for UDP packets */
77 splay_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this node */
79 splay_tree_t *edge_tree; /* Edges with this node as one of the endpoints */
81 struct connection_t *connection; /* Connection associated with this node (if a direct connection exists) */
83 uint32_t sent_seqno; /* Sequence number last sent to this node */
84 uint32_t received_seqno; /* Sequence number last received from this node */
85 uint32_t received; /* Total valid packets received from this node */
86 uint32_t prev_received_seqno;
87 uint32_t prev_received;
88 uint32_t farfuture; /* Packets in a row that have arrived from the far future */
89 unsigned char* late; /* Bitfield marking late packets */
91 struct timeval udp_ping_sent; /* Last time a UDP probe was sent */
92 timeout_t udp_ping_timeout; /* Ping timeout event */
94 struct timeval mtu_ping_sent; /* Last time a MTU probe was sent */
96 length_t mtu; /* Maximum size of packets to send to this node */
97 length_t minmtu; /* Probed minimum MTU */
98 length_t maxmtu; /* Probed maximum MTU */
99 int mtuprobes; /* Number of probes */
103 uint64_t out_packets;
107 extern struct node_t *myself;
108 extern splay_tree_t *node_tree;
110 extern void init_nodes(void);
111 extern void exit_nodes(void);
112 extern node_t *new_node(void) __attribute__ ((__malloc__));
113 extern void free_node(node_t *);
114 extern void node_add(node_t *);
115 extern void node_del(node_t *);
116 extern node_t *lookup_node(char *);
117 extern node_t *lookup_node_id(const node_id_t *);
118 extern node_t *lookup_node_udp(const sockaddr_t *);
119 extern bool dump_nodes(struct connection_t *);
120 extern bool dump_traffic(struct connection_t *);
121 extern void update_node_udp(node_t *, const sockaddr_t *);
123 #endif /* __TINC_NODE_H__ */