src/connection.h

   1 /*
   2     connection.h -- header for connection.c
   3     Copyright (C) 2000-2010 Guus Sliepen <guus@tinc-vpn.org>,
   4                   2000-2005 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_CONNECTION_H__
  22 #define __TINC_CONNECTION_H__
  23
  24 #include "cipher.h"
  25 #include "digest.h"
  26 #include "rsa.h"
  27 #include "splay_tree.h"
  28
  29 #define OPTION_INDIRECT         0x0001
  30 #define OPTION_TCPONLY          0x0002
  31 #define OPTION_PMTU_DISCOVERY   0x0004
  32 #define OPTION_CLAMP_MSS        0x0008
  33
  34 typedef struct connection_status_t {
  35                 int pinged:1;                           /* sent ping */
  36                 int active:1;                           /* 1 if active.. */
  37                 int connecting:1;                       /* 1 if we are waiting for a non-blocking connect() to finish */
  38                 int termreq:1;                          /* the termination of this connection was requested */
  39                 int remove_unused:1;                            /* Set to 1 if you want this connection removed */
  40                 int timeout_unused:1;                           /* 1 if gotten timeout */
  41                 int encryptout:1;                       /* 1 if we can encrypt outgoing traffic */
  42                 int decryptin:1;                        /* 1 if we have to decrypt incoming traffic */
  43                 int mst:1;                              /* 1 if this connection is part of a minimum spanning tree */
  44                 int control:1;
  45                 int unused:22;
  46 } connection_status_t;
  47
  48 #include "edge.h"
  49 #include "list.h"
  50 #include "net.h"
  51 #include "node.h"
  52
  53 typedef struct connection_t {
  54         char *name;                                     /* name he claims to have */
  55
  56         union sockaddr_t address;                       /* his real (internet) ip */
  57         char *hostname;                         /* the hostname of its real ip */
  58         int protocol_version;           /* used protocol */
  59
  60         int socket;                                     /* socket used for this connection */
  61         uint32_t options;                       /* options for this connection */
  62         connection_status_t status;     /* status info */
  63         int estimated_weight;           /* estimation for the weight of the edge for this connection */
  64         struct timeval start;           /* time this connection was started, used for above estimation */
  65         struct outgoing_t *outgoing;    /* used to keep track of outgoing connections */
  66
  67         struct node_t *node;            /* node associated with the other end */
  68         struct edge_t *edge;            /* edge associated with this connection */
  69
  70         rsa_t rsa;                      /* his public/private key */
  71         cipher_t incipher;              /* Cipher he will use to send data to us */
  72         cipher_t outcipher;             /* Cipher we will use to send data to him */
  73         digest_t indigest;
  74         digest_t outdigest;
  75
  76         int inmaclength;
  77         int outmaclength;
  78         int incompression;
  79         int outcompression;
  80
  81         char *hischallenge;             /* The challenge we sent to him */
  82
  83         thread_t thread;
  84         int tcplen;                                     /* length of incoming TCPpacket */
  85         int allow_request;                      /* defined if there's only one request possible */
  86
  87         time_t last_ping_time;          /* last time we saw some activity from the other end or pinged them */
  88
  89         splay_tree_t *config_tree;      /* Pointer to configuration tree belonging to him */
  90 } connection_t;
  91
  92 extern splay_tree_t *connection_tree;
  93 extern connection_t *broadcast;
  94
  95 extern void init_connections(void);
  96 extern void exit_connections(void);
  97 extern connection_t *new_connection(void) __attribute__ ((__malloc__));
  98 extern void free_connection(connection_t *);
  99 extern void connection_add(connection_t *);
 100 extern void connection_del(connection_t *);
 101 extern bool dump_connections(struct connection_t *);
 102
 103 #endif                                                  /* __TINC_CONNECTION_H__ */