release/src/router/tinc/src/node.h

   1 /*
   2     node.h -- header for node.c
   3     Copyright (C) 2001-2013 Guus Sliepen <guus@tinc-vpn.org>,
   4                   2001-2005 Ivo Timmermans
   5
   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.
  10
  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.
  15
  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.
  19 */
  20
  21 #ifndef __TINC_NODE_H__
  22 #define __TINC_NODE_H__
  23
  24 #include "splay_tree.h"
  25 #include "cipher.h"
  26 #include "connection.h"
  27 #include "digest.h"
  28 #include "event.h"
  29 #include "subnet.h"
  30
  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 unused:23;
  42 } node_status_t;
  43
  44 typedef struct node_t {
  45         char *name;                             /* name of this node */
  46         node_id_t id;                           /* unique node ID (name hash) */
  47         uint32_t options;                       /* options turned on for this node */
  48
  49         int sock;                               /* Socket to use for outgoing UDP packets */
  50         sockaddr_t address;                     /* his real (internet) ip to send UDP packets to */
  51         char *hostname;                         /* the hostname of its real ip */
  52
  53         node_status_t status;
  54         time_t last_state_change;
  55         time_t last_req_key;
  56
  57         ecdsa_t *ecdsa;                         /* His public ECDSA key */
  58         sptps_t sptps;
  59
  60         cipher_t *incipher;                     /* Cipher for UDP packets */
  61         digest_t *indigest;                     /* Digest for UDP packets */
  62
  63         cipher_t *outcipher;                    /* Cipher for UDP packets */
  64         digest_t *outdigest;                    /* Digest for UDP packets */
  65
  66         int incompression;                      /* Compressionlevel, 0 = no compression */
  67         int outcompression;                     /* Compressionlevel, 0 = no compression */
  68
  69         int distance;
  70         struct node_t *nexthop;                 /* nearest node from us to him */
  71         struct edge_t *prevedge;                /* nearest node from him to us */
  72         struct node_t *via;                     /* next hop for UDP packets */
  73
  74         splay_tree_t *subnet_tree;              /* Pointer to a tree of subnets belonging to this node */
  75
  76         splay_tree_t *edge_tree;                /* Edges with this node as one of the endpoints */
  77
  78         struct connection_t *connection;        /* Connection associated with this node (if a direct connection exists) */
  79
  80         uint32_t sent_seqno;                    /* Sequence number last sent to this node */
  81         uint32_t received_seqno;                /* Sequence number last received from this node */
  82         uint32_t received;                      /* Total valid packets received from this node */
  83         uint32_t prev_received_seqno;
  84         uint32_t prev_received;
  85         uint32_t farfuture;                     /* Packets in a row that have arrived from the far future */
  86         unsigned char* late;                    /* Bitfield marking late packets */
  87
  88         length_t mtu;                           /* Maximum size of packets to send to this node */
  89         length_t minmtu;                        /* Probed minimum MTU */
  90         length_t maxmtu;                        /* Probed maximum MTU */
  91         int mtuprobes;                          /* Number of probes */
  92         timeout_t mtutimeout;                   /* Probe event */
  93         struct timeval probe_time;              /* Time the last probe was sent or received */
  94         int probe_counter;                      /* Number of probes received since last burst was sent */
  95         float rtt;                              /* Last measured round trip time */
  96         float bandwidth;                        /* Last measured bandwidth */
  97         float packetloss;                       /* Last measured packet loss rate */
  98
  99         uint64_t in_packets;
 100         uint64_t in_bytes;
 101         uint64_t out_packets;
 102         uint64_t out_bytes;
 103 } node_t;
 104
 105 extern struct node_t *myself;
 106 extern splay_tree_t *node_tree;
 107
 108 extern void init_nodes(void);
 109 extern void exit_nodes(void);
 110 extern node_t *new_node(void) __attribute__ ((__malloc__));
 111 extern void free_node(node_t *);
 112 extern void node_add(node_t *);
 113 extern void node_del(node_t *);
 114 extern node_t *lookup_node(char *);
 115 extern node_t *lookup_node_id(const node_id_t *);
 116 extern node_t *lookup_node_udp(const sockaddr_t *);
 117 extern bool dump_nodes(struct connection_t *);
 118 extern bool dump_traffic(struct connection_t *);
 119 extern void update_node_udp(node_t *, const sockaddr_t *);
 120
 121 #endif /* __TINC_NODE_H__ */