2 node.h -- header for node.c
3 Copyright (C) 2001-2010 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__
25 #include "connection.h"
29 typedef struct node_status_t {
30 unsigned int unused_active:1; /* 1 if active (not used for nodes) */
31 unsigned int validkey:1; /* 1 if we currently have a valid key for him */
32 unsigned int unused_waitingforkey:1; /* 1 if we already sent out a request */
33 unsigned int visited:1; /* 1 if this node has been visited by one of the graph algorithms */
34 unsigned int reachable:1; /* 1 if this node is reachable in the graph */
35 unsigned int indirect:1; /* 1 if this node is not directly reachable by us */
36 unsigned int unused:26;
39 typedef struct node_t {
40 char *name; /* name of this node */
41 uint32_t options; /* options turned on for this node */
43 int sock; /* Socket to use for outgoing UDP packets */
44 sockaddr_t address; /* his real (internet) ip to send UDP packets to */
45 char *hostname; /* the hostname of its real ip */
50 const EVP_CIPHER *incipher; /* Cipher type for UDP packets received from him */
51 char *inkey; /* Cipher key and iv */
52 int inkeylength; /* Cipher key and iv length */
53 EVP_CIPHER_CTX inctx; /* Cipher context */
55 const EVP_CIPHER *outcipher; /* Cipher type for UDP packets sent to him*/
56 char *outkey; /* Cipher key and iv */
57 int outkeylength; /* Cipher key and iv length */
58 EVP_CIPHER_CTX outctx; /* Cipher context */
60 const EVP_MD *indigest; /* Digest type for MAC of packets received from him */
61 int inmaclength; /* Length of MAC */
63 const EVP_MD *outdigest; /* Digest type for MAC of packets sent to him*/
64 int outmaclength; /* Length of MAC */
66 int incompression; /* Compressionlevel, 0 = no compression */
67 int outcompression; /* Compressionlevel, 0 = no compression */
69 struct node_t *nexthop; /* nearest node from us to him */
70 struct node_t *via; /* next hop for UDP packets */
72 avl_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this node */
74 avl_tree_t *edge_tree; /* Edges with this node as one of the endpoints */
76 struct connection_t *connection; /* Connection associated with this node (if a direct connection exists) */
78 uint32_t sent_seqno; /* Sequence number last sent to this node */
79 uint32_t received_seqno; /* Sequence number last received from this node */
80 uint32_t farfuture; /* Packets in a row that have arrived from the far future */
81 unsigned char* late; /* Bitfield marking late packets */
83 length_t mtu; /* Maximum size of packets to send to this node */
84 length_t minmtu; /* Probed minimum MTU */
85 length_t maxmtu; /* Probed maximum MTU */
86 int mtuprobes; /* Number of probes */
87 event_t *mtuevent; /* Probe event */
90 extern struct node_t *myself;
91 extern avl_tree_t *node_tree;
92 extern avl_tree_t *node_udp_tree;
94 extern void init_nodes(void);
95 extern void exit_nodes(void);
96 extern node_t *new_node(void) __attribute__ ((__malloc__));
97 extern void free_node(node_t *);
98 extern void node_add(node_t *);
99 extern void node_del(node_t *);
100 extern node_t *lookup_node(char *);
101 extern node_t *lookup_node_udp(const sockaddr_t *);
102 extern void update_node_udp(node_t *, const sockaddr_t *);
103 extern void dump_nodes(void);
105 #endif /* __TINC_NODE_H__ */