1 #ifndef MESHLINK_NODE_H
2 #define MESHLINK_NODE_H
5 node.h -- header for node.c
6 Copyright (C) 2014, 2017 Guus Sliepen <guus@meshlink.io>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
29 typedef struct node_status_t {
30 uint16_t validkey: 1; /* 1 if we currently have a valid key for him */
31 uint16_t waitingforkey: 1; /* 1 if we already sent out a request */
32 uint16_t visited: 1; /* 1 if this node has been visited by one of the graph algorithms */
33 uint16_t reachable: 1; /* 1 if this node is reachable in the graph */
34 uint16_t udp_confirmed: 1; /* 1 if the address is one that we received UDP traffic on */
35 uint16_t broadcast: 1; /* 1 if the next UDP packet should be broadcast to the local network */
36 uint16_t blacklisted: 1; /* 1 if the node is blacklist so we never want to speak with him anymore */
37 uint16_t destroyed: 1; /* 1 if the node is being destroyed, deallocate channels when any callback is triggered */
38 uint16_t duplicate: 1; /* 1 if the node is duplicate, ie. multiple nodes using the same Name are online */
39 uint16_t dirty: 1; /* 1 if the configuration of the node is dirty and needs to be written out */
40 uint16_t want_udp: 1; /* 1 if we want working UDP because we have data to send */
45 typedef struct node_t {
46 // Public member variables
47 char *name; /* name of this node */
50 // Private member variables
52 uint16_t minmtu; /* Probed minimum MTU */
55 // Used for packet I/O
56 int sock; /* Socket to use for outgoing UDP packets */
57 uint32_t session_id; /* Unique ID for this node's currently running process */
59 sockaddr_t address; /* his real (internet) ip to send UDP packets to */
70 timeout_t mtutimeout; /* Probe event */
71 int mtuprobes; /* Number of probes */
72 uint16_t mtu; /* Maximum size of packets to send to this node */
73 uint16_t maxmtu; /* Probed maximum MTU */
75 // Used for meta-connection I/O, timeouts
76 struct meshlink_handle *mesh; /* The mesh this node belongs to */
77 struct submesh_t *submesh; /* Nodes Sub-Mesh Handle*/
81 struct ecdsa *ecdsa; /* His public ECDSA key */
83 struct connection_t *connection; /* Connection associated with this node (if a direct connection exists) */
84 time_t last_connect_try;
85 time_t last_successfull_connection;
87 char *canonical_address; /* The canonical address of this node, if known */
88 sockaddr_t recent[MAX_RECENT]; /* Recently seen addresses */
89 sockaddr_t catta_address; /* Latest address seen by Catta */
91 // Graph-related member variables
92 time_t last_reachable;
93 time_t last_unreachable;
96 struct node_t *nexthop; /* nearest node from us to him */
97 struct edge_t *prevedge; /* nearest node from him to us */
99 struct splay_tree_t *edge_tree; /* Edges with this node as one of the endpoints */
102 void init_nodes(struct meshlink_handle *mesh);
103 void exit_nodes(struct meshlink_handle *mesh);
104 node_t *new_node(void) __attribute__((__malloc__));
105 void free_node(node_t *n);
106 void node_add(struct meshlink_handle *mesh, node_t *n);
107 void node_del(struct meshlink_handle *mesh, node_t *n);
108 node_t *lookup_node(struct meshlink_handle *mesh, const char *name) __attribute__((__warn_unused_result__));
109 node_t *lookup_node_udp(struct meshlink_handle *mesh, const sockaddr_t *sa) __attribute__((__warn_unused_result__));
110 void update_node_udp(struct meshlink_handle *mesh, node_t *n, const sockaddr_t *sa);
111 bool node_add_recent_address(struct meshlink_handle *mesh, node_t *n, const sockaddr_t *addr);