client/src/main.c

   1 /*
   2  *  tunnel6
   3  *  Copyright (C) 2010  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <stdio.h>
  23 #include "sig.h"
  24 #include "ipv6.h"
  25 #include "poll.h"
  26 #include "proto.h"
  27 #include "config.h"
  28 #include "tunnel.h"
  29 #include "tundev.h"
  30 #include "defaults.h"
  31 #include "heartbeat.h"
  32 #ifdef __WIN32__
  33 # include <windows.h>
  34 #endif
  35
  36 int cont;                       /* Continue in tunnel processing ? 1 - yes / 0 - no */
  37
  38 int init (char *addr, unsigned short port, char *name, char *pwd)
  39 {
  40         if (tundev_init () == -1)
  41                 return -1;
  42
  43         if (tunnel_init (addr, port, name, pwd) == -1)
  44                 return -1;
  45
  46         if (ipv6_init () == -1)
  47                 return -1;
  48
  49         if (tundev_setup () == -1)
  50                 return -1;
  51
  52         if (heartbeat_init () == -1)
  53                 return -1;
  54
  55         if (poll_init () == -1)
  56                 return -1;
  57
  58         if (sig_init () == -1)
  59                 return -1;
  60
  61         cont = 1;
  62
  63         return 0;
  64 }
  65
  66 int loop ()
  67 {
  68         /* loop until cont is non-zero */
  69         for (; cont;) {
  70                 poll_loop ();           /* check socket events */
  71
  72                 heartbeat_loop ();      /* send heartbeat packets in interval */
  73         }
  74
  75         return 0;
  76 }
  77
  78 int syntax (char *bin)
  79 {
  80         printf ("Syntax error\n\t%s: name password tunnel6server\n", bin);
  81
  82         return -1;
  83 }
  84
  85 int main (int argc, char **argv)
  86 {
  87         printf ("TUNNEL6 client v%s by ZeXx86\n", DEFAULT_VERSION);
  88
  89         /* login name */
  90         char *name = 0;
  91         /* login password */
  92         char *pwd = 0;
  93         /* tunnel server address */
  94         char *server = 0;
  95         /* listen port */
  96         unsigned short port = DEFAULT_PORT;
  97
  98         /* we've found config */
  99         if (argc < 4) {
 100                 if (config_init () == -1) {
 101                         syntax (argv[0]);
 102
 103                         return -1;
 104                 }
 105
 106                 /* set config values */
 107                 name = config.name;
 108                 pwd = config.pwd;
 109                 server = config.server;
 110
 111                 if (config.port)
 112                         port = config.port;
 113         } else {
 114                 /* set values from parameters */
 115                 name = argv[1];
 116                 pwd = argv[2];
 117                 server = argv[3];
 118
 119                 if (argc > 4)
 120                         port = (unsigned short) atoi (argv[4]);
 121         }
 122
 123         printf ("User name: %s\n"
 124                 "Server: %s\n"
 125                 "Port: %u\n", name, server, port);
 126
 127         /* Initialize routines */
 128         if (init (server, port, name, pwd) == -1)
 129                 return -1;
 130
 131         loop ();
 132
 133         printf ("> closing tunnel\n");
 134
 135         /* disconnect from server */
 136         proto_cmd_disconnect2 ();
 137
 138         return 0;
 139 }