tunDevice.cpp

   1 /*
   2  *  anytun
   3  *
   4  *  The secure anycast tunneling protocol (satp) defines a protocol used
   5  *  for communication between any combination of unicast and anycast
   6  *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
   7  *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
   8  *  ethernet, ip, arp ...). satp directly includes cryptography and
   9  *  message authentication based on the methodes used by SRTP.  It is
  10  *  intended to deliver a generic, scaleable and secure solution for
  11  *  tunneling and relaying of packets of any protocol.
  12  *
  13  *
  14  *  Copyright (C) 2007 anytun.org <satp@wirdorange.org>
  15  *
  16  *  This program is free software; you can redistribute it and/or modify
  17  *  it under the terms of the GNU General Public License version 2
  18  *  as published by the Free Software Foundation.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *  GNU General Public License for more details.
  24  *
  25  *  You should have received a copy of the GNU General Public License
  26  *  along with this program (see the file COPYING included with this
  27  *  distribution); if not, write to the Free Software Foundation, Inc.,
  28  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  29  */
  30
  31 #include <stdexcept>
  32
  33 extern "C" {
  34 #include "openvpn/config.h"
  35 #include "openvpn/syshead.h"
  36 #include "openvpn/tun.h"
  37 }
  38
  39 #include "tunDevice.h"
  40
  41
  42 TunDevice::TunDevice(const char* dev_name, const char* ifcfg_lp, const char* ifcfg_rnmp)
  43 {
  44   is_open_ = false;
  45   dev_ = NULL;
  46   if(!dev_name)
  47     dev_name_ = NULL;
  48   else
  49     strcpy(dev_name_,dev_name);
  50
  51 // init_tun (const char *dev,       /* --dev option */
  52 //               const char *dev_type,  /* --dev-type option */
  53 //               const char *ifconfig_local_parm,          /* --ifconfig parm 1 */
  54 //               const char *ifconfig_remote_netmask_parm, /* --ifconfig parm 2 */
  55 //               in_addr_t local_public,
  56 //               in_addr_t remote_public,
  57 //               const bool strict_warn,
  58 //               struct env_set *es)
  59
  60 // init_tun_post (struct tuntap *tt,
  61 //                    const struct frame *frame,
  62 //                    const struct tuntap_options *options)
  63
  64 // -------------------------------------------
  65
  66 // c->c1.tuntap = init_tun (c->options.dev,
  67 //                          c->options.dev_type,
  68 //                          c->options.ifconfig_local,
  69 //                          c->options.ifconfig_remote_netmask,
  70 //                          addr_host (&c->c1.link_socket_addr.local),
  71 //                          addr_host (&c->c1.link_socket_addr.remote),
  72 //                          !c->options.ifconfig_nowarn,
  73 //                          c->c2.es);
  74
  75 // init_tun_post (c->c1.tuntap,
  76 //                &c->c2.frame,
  77 //                &c->options.tuntap_options);
  78
  79   in_addr_t lp, rp;
  80
  81 //   lp = inet_addr("192.168.198.1");
  82 //   rp = inet_addr("192.168.199.1");
  83
  84   dev_ = init_tun(dev_name, NULL, ifcfg_lp, ifcfg_rnmp, lp, rp, 0, NULL);
  85       //init_tun_post(dev_, NULL, NULL);
  86   if(!dev_)
  87     throw std::runtime_error("can't init tun");
  88 }
  89
  90 TunDevice::~TunDevice()
  91 {
  92   if(dev_ && is_open_)
  93     close_tun(dev_);
  94 }
  95
  96 void TunDevice::open()
  97 {
  98   if(!dev_)
  99     return;
 100 // open_tun (const char *dev,
 101 //           const char *dev_type,
 102 //           const char *dev_node,
 103 //           bool ipv6,
 104 //           struct tuntap *tt)
 105
 106 // ------------------------
 107
 108 // open_tun (c->options.dev,
 109 //           c->options.dev_type,
 110 //           c->options.dev_node,
 111 //           c->options.tun_ipv6,
 112 //           c->c1.tuntap);
 113
 114   open_tun (dev_name_, NULL, NULL, false, dev_);
 115   do_ifconfig(dev_, dev_->actual_name, 1500, NULL);
 116   is_open_ = true;
 117 }
 118
 119 void TunDevice::close()
 120 {
 121   if(dev_)
 122     close_tun(dev_);
 123   is_open_ = false;
 124 }
 125
 126 bool TunDevice::isOpen()
 127 {
 128   return is_open_;
 129 }
 130
 131 int TunDevice::read(Buffer& buf)
 132 {
 133   if(!dev_)
 134     return -1;
 135
 136   return read_tun(dev_, buf, buf.getLength());
 137 }
 138
 139 int TunDevice::write(Buffer& buf)
 140 {
 141   if(!dev_)
 142     return -1;
 143
 144   return write_tun(dev_, buf, buf.getLength());
 145 }
 146
 147 char* TunDevice::getActualName()
 148 {
 149   if(!dev_)
 150     return NULL;
 151
 152   return dev_->actual_name;
 153 }