105 lines
4 KiB
C
105 lines
4 KiB
C
/*
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node.h -- header for node.c
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Copyright (C) 2001-2010 Guus Sliepen <guus@tinc-vpn.org>,
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2001-2005 Ivo Timmermans
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __TINC_NODE_H__
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#define __TINC_NODE_H__
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#include "avl_tree.h"
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#include "connection.h"
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#include "event.h"
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#include "list.h"
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#include "subnet.h"
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typedef struct node_status_t {
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int unused_active:1; /* 1 if active (not used for nodes) */
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int validkey:1; /* 1 if we currently have a valid key for him */
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int unused_waitingforkey:1; /* 1 if we already sent out a request */
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int visited:1; /* 1 if this node has been visited by one of the graph algorithms */
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int reachable:1; /* 1 if this node is reachable in the graph */
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int indirect:1; /* 1 if this node is not directly reachable by us */
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int unused:26;
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} node_status_t;
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typedef struct node_t {
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char *name; /* name of this node */
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uint32_t options; /* options turned on for this node */
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sockaddr_t address; /* his real (internet) ip to send UDP packets to */
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char *hostname; /* the hostname of its real ip */
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node_status_t status;
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time_t last_req_key;
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const EVP_CIPHER *incipher; /* Cipher type for UDP packets received from him */
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char *inkey; /* Cipher key and iv */
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int inkeylength; /* Cipher key and iv length */
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EVP_CIPHER_CTX inctx; /* Cipher context */
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const EVP_CIPHER *outcipher; /* Cipher type for UDP packets sent to him*/
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char *outkey; /* Cipher key and iv */
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int outkeylength; /* Cipher key and iv length */
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EVP_CIPHER_CTX outctx; /* Cipher context */
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const EVP_MD *indigest; /* Digest type for MAC of packets received from him */
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int inmaclength; /* Length of MAC */
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const EVP_MD *outdigest; /* Digest type for MAC of packets sent to him*/
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int outmaclength; /* Length of MAC */
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int incompression; /* Compressionlevel, 0 = no compression */
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int outcompression; /* Compressionlevel, 0 = no compression */
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struct node_t *nexthop; /* nearest node from us to him */
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struct node_t *via; /* next hop for UDP packets */
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avl_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this node */
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avl_tree_t *edge_tree; /* Edges with this node as one of the endpoints */
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struct connection_t *connection; /* Connection associated with this node (if a direct connection exists) */
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uint32_t sent_seqno; /* Sequence number last sent to this node */
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uint32_t received_seqno; /* Sequence number last received from this node */
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uint32_t farfuture; /* Packets in a row that have arrived from the far future */
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unsigned char* late; /* Bitfield marking late packets */
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length_t mtu; /* Maximum size of packets to send to this node */
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length_t minmtu; /* Probed minimum MTU */
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length_t maxmtu; /* Probed maximum MTU */
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int mtuprobes; /* Number of probes */
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event_t *mtuevent; /* Probe event */
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} node_t;
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extern struct node_t *myself;
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extern avl_tree_t *node_tree;
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extern avl_tree_t *node_udp_tree;
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extern void init_nodes(void);
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extern void exit_nodes(void);
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extern node_t *new_node(void) __attribute__ ((__malloc__));
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extern void free_node(node_t *);
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extern void node_add(node_t *);
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extern void node_del(node_t *);
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extern node_t *lookup_node(char *);
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extern node_t *lookup_node_udp(const sockaddr_t *);
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extern void update_node_udp(node_t *, const sockaddr_t *);
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extern void dump_nodes(void);
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#endif /* __TINC_NODE_H__ */
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