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- #ifndef TINC_NODE_H
- #define TINC_NODE_H
- /*
- node.h -- header for node.c
- Copyright (C) 2001-2016 Guus Sliepen <guus@tinc-vpn.org>,
- 2001-2005 Ivo Timmermans
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #include "avl_tree.h"
- #include "connection.h"
- #include "event.h"
- #include "subnet.h"
- typedef struct node_status_t {
- unsigned int unused_active: 1; /* 1 if active (not used for nodes) */
- unsigned int validkey: 1; /* 1 if we currently have a valid key for him */
- unsigned int unused_waitingforkey: 1; /* 1 if we already sent out a request */
- unsigned int visited: 1; /* 1 if this node has been visited by one of the graph algorithms */
- unsigned int reachable: 1; /* 1 if this node is reachable in the graph */
- unsigned int indirect: 1; /* 1 if this node is not directly reachable by us */
- unsigned int unused: 26;
- } node_status_t;
- typedef struct node_t {
- char *name; /* name of this node */
- uint32_t options; /* options turned on for this node */
- int sock; /* Socket to use for outgoing UDP packets */
- sockaddr_t address; /* his real (internet) ip to send UDP packets to */
- char *hostname; /* the hostname of its real ip */
- node_status_t status;
- time_t last_req_key;
- const EVP_CIPHER *incipher; /* Cipher type for UDP packets received from him */
- char *inkey; /* Cipher key and iv */
- int inkeylength; /* Cipher key and iv length */
- EVP_CIPHER_CTX *inctx; /* Cipher context */
- const EVP_CIPHER *outcipher; /* Cipher type for UDP packets sent to him*/
- char *outkey; /* Cipher key and iv */
- int outkeylength; /* Cipher key and iv length */
- EVP_CIPHER_CTX *outctx; /* Cipher context */
- const EVP_MD *indigest; /* Digest type for MAC of packets received from him */
- int inmaclength; /* Length of MAC */
- const EVP_MD *outdigest; /* Digest type for MAC of packets sent to him*/
- int outmaclength; /* Length of MAC */
- int incompression; /* Compressionlevel, 0 = no compression */
- int outcompression; /* Compressionlevel, 0 = no compression */
- struct node_t *nexthop; /* nearest node from us to him */
- struct edge_t *prevedge; /* nearest node from him to us */
- struct node_t *via; /* next hop for UDP packets */
- avl_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this node */
- avl_tree_t *edge_tree; /* Edges with this node as one of the endpoints */
- struct connection_t *connection; /* Connection associated with this node (if a direct connection exists) */
- uint32_t sent_seqno; /* Sequence number last sent to this node */
- uint32_t received_seqno; /* Sequence number last received from this node */
- uint32_t farfuture; /* Packets in a row that have arrived from the far future */
- unsigned char *late; /* Bitfield marking late packets */
- length_t mtu; /* Maximum size of packets to send to this node */
- length_t minmtu; /* Probed minimum MTU */
- length_t maxmtu; /* Probed maximum MTU */
- int mtuprobes; /* Number of probes */
- event_t *mtuevent; /* Probe event */
- } node_t;
- extern struct node_t *myself;
- extern avl_tree_t *node_tree;
- extern avl_tree_t *node_udp_tree;
- extern void init_nodes(void);
- extern void exit_nodes(void);
- extern node_t *new_node(void) __attribute__((__malloc__));
- extern void free_node(node_t *n);
- extern void node_add(node_t *n);
- extern void node_del(node_t *n);
- extern node_t *lookup_node(char *name);
- extern node_t *lookup_node_udp(const sockaddr_t *sa);
- extern void update_node_udp(node_t *n, const sockaddr_t *sa);
- extern void dump_nodes(void);
- #endif
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