release/src/router/tinc/src/connection.h

   1 /*
   2     connection.h -- header for connection.c
   3     Copyright (C) 2000-2013 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 "buffer.h"
  25 #include "cipher.h"
  26 #include "digest.h"
  27 #include "rsa.h"
  28 #include "list.h"
  29 #include "sptps.h"
  30
  31 #define OPTION_INDIRECT         0x0001
  32 #define OPTION_TCPONLY          0x0002
  33 #define OPTION_PMTU_DISCOVERY   0x0004
  34 #define OPTION_CLAMP_MSS        0x0008
  35 #define OPTION_VERSION(x) ((x) >> 24) /* Top 8 bits are for protocol minor version */
  36
  37 typedef struct connection_status_t {
  38                 unsigned int pinged:1;                  /* sent ping */
  39                 unsigned int active:1;                  /* 1 if active.. */
  40                 unsigned int connecting:1;              /* 1 if we are waiting for a non-blocking connect() to finish */
  41                 unsigned int unused_termreq:1;          /* the termination of this connection was requested */
  42                 unsigned int remove_unused:1;           /* Set to 1 if you want this connection removed */
  43                 unsigned int timeout_unused:1;          /* 1 if gotten timeout */
  44                 unsigned int encryptout:1;              /* 1 if we can encrypt outgoing traffic */
  45                 unsigned int decryptin:1;               /* 1 if we have to decrypt incoming traffic */
  46                 unsigned int mst:1;                     /* 1 if this connection is part of a minimum spanning tree */
  47                 unsigned int control:1;                 /* 1 if this is a control connection */
  48                 unsigned int pcap:1;                    /* 1 if this is a control connection requesting packet capture */
  49                 unsigned int log:1;                     /* 1 if this is a control connection requesting log dump */
  50                 unsigned int invitation:1;              /* 1 if this is an invitation */
  51                 unsigned int invitation_used:1;         /* 1 if the invitation has been consumed */
  52                 unsigned int unused:19;
  53 } connection_status_t;
  54
  55 #include "ecdsa.h"
  56 #include "edge.h"
  57 #include "net.h"
  58 #include "node.h"
  59
  60 typedef struct connection_t {
  61         char *name;                     /* name he claims to have */
  62
  63         union sockaddr_t address;       /* his real (internet) ip */
  64         char *hostname;                 /* the hostname of its real ip */
  65         int protocol_major;             /* used protocol */
  66         int protocol_minor;             /* used protocol */
  67
  68         int socket;                     /* socket used for this connection */
  69         uint32_t options;               /* options for this connection */
  70         connection_status_t status;     /* status info */
  71         int estimated_weight;           /* estimation for the weight of the edge for this connection */
  72         struct timeval start;           /* time this connection was started, used for above estimation */
  73         struct outgoing_t *outgoing;    /* used to keep track of outgoing connections */
  74
  75         struct node_t *node;            /* node associated with the other end */
  76         struct edge_t *edge;            /* edge associated with this connection */
  77
  78         rsa_t *rsa;                     /* his public RSA key */
  79         ecdsa_t *ecdsa;                 /* his public ECDSA key */
  80         cipher_t *incipher;             /* Cipher he will use to send data to us */
  81         cipher_t *outcipher;            /* Cipher we will use to send data to him */
  82         digest_t *indigest;
  83         digest_t *outdigest;
  84         sptps_t sptps;
  85
  86         int inmaclength;
  87         int outmaclength;
  88         int incompression;
  89         int outcompression;
  90
  91         char *hischallenge;             /* The challenge we sent to him */
  92
  93         struct buffer_t inbuf;
  94         struct buffer_t outbuf;
  95         io_t io;                        /* input/output event on this metadata connection */
  96         int tcplen;                     /* length of incoming TCPpacket */
  97         int allow_request;              /* defined if there's only one request possible */
  98
  99         time_t last_ping_time;          /* last time we saw some activity from the other end or pinged them */
 100
 101         splay_tree_t *config_tree;      /* Pointer to configuration tree belonging to him */
 102 } connection_t;
 103
 104 extern list_t *connection_list;
 105 extern connection_t *everyone;
 106
 107 extern void init_connections(void);
 108 extern void exit_connections(void);
 109 extern connection_t *new_connection(void) __attribute__ ((__malloc__));
 110 extern void free_connection(connection_t *);
 111 extern void connection_add(connection_t *);
 112 extern void connection_del(connection_t *);
 113 extern bool dump_connections(struct connection_t *);
 114
 115 #endif /* __TINC_CONNECTION_H__ */