added own tun device implementation for linux

2 files changed, 238 insertions, 0 deletions

diff --git a/src/ovpn/tunDevice.cpp b/src/ovpn/tunDevice.cpp
new file mode 100644
index 0000000..b3c07b0
--- /dev/null
+++ b/src/ovpn/tunDevice.cpp
@@ -0,0 +1,172 @@
+/*
+ *  anytun
+ *
+ *  The secure anycast tunneling protocol (satp) defines a protocol used
+ *  for communication between any combination of unicast and anycast
+ *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
+ *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
+ *  ethernet, ip, arp ...). satp directly includes cryptography and
+ *  message authentication based on the methodes used by SRTP.  It is
+ *  intended to deliver a generic, scaleable and secure solution for
+ *  tunneling and relaying of packets of any protocol.
+ *
+ *
+ *  Copyright (C) 2007 anytun.org <satp@wirdorange.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program (see the file COPYING included with this
+ *  distribution); if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <stdexcept>
+#include <poll.h>
+
+extern "C" {
+#include "openvpn/config.h"
+#include "openvpn/syshead.h"
+#include "openvpn/tun.h"
+}
+
+#include "tunDevice.h"
+#include "threadUtils.hpp"
+
+
+TunDevice::TunDevice(const char* dev_name,const char* dev_type, const char* ifcfg_lp, const char* ifcfg_rnmp)
+{
+  dev_ = NULL;
+
+// init_tun (const char *dev,       /* --dev option */
+// 	         const char *dev_type,  /* --dev-type option */
+// 	         const char *ifconfig_local_parm,          /* --ifconfig parm 1 */
+// 	         const char *ifconfig_remote_netmask_parm, /* --ifconfig parm 2 */
+// 	         in_addr_t local_public,
+// 	         in_addr_t remote_public,
+// 	         const bool strict_warn,
+// 	         struct env_set *es)
+
+// init_tun_post (struct tuntap *tt,
+// 	              const struct frame *frame,
+// 	              const struct tuntap_options *options)
+
+// open_tun (const char *dev,
+//           const char *dev_type,
+//           const char *dev_node, 
+//           bool ipv6, 
+//           struct tuntap *tt)
+
+// -------------------------------------------
+
+// c->c1.tuntap = init_tun (c->options.dev,
+//                          c->options.dev_type,
+//                          c->options.ifconfig_local,
+//                          c->options.ifconfig_remote_netmask,
+//                          addr_host (&c->c1.link_socket_addr.local),
+//                          addr_host (&c->c1.link_socket_addr.remote),
+//                          !c->options.ifconfig_nowarn,
+//                          c->c2.es);
+  
+// init_tun_post (c->c1.tuntap,
+//                &c->c2.frame,
+//                &c->options.tuntap_options);
+
+// open_tun (c->options.dev, 
+//           c->options.dev_type, 
+//           c->options.dev_node,
+//           c->options.tun_ipv6,
+//           c->c1.tuntap);
+
+
+  
+  in_addr_t lp, rp;
+
+//   lp = inet_addr("192.168.198.1");
+//   rp = inet_addr("192.168.199.1");
+
+  dev_ = init_tun(dev_name, dev_type, ifcfg_lp, ifcfg_rnmp, lp, rp, 0, NULL);
+  struct frame frame;
+  struct tuntap_options options;
+
+#ifdef TARGET_LINUX
+  options.txqueuelen = 100;
+#endif
+
+  init_tun_post(dev_, &frame, &options);
+  if(!dev_)
+    throw std::runtime_error("can't init tun/tap device");
+
+  open_tun (dev_name, NULL, NULL, true, dev_);
+  do_ifconfig(dev_, dev_->actual_name, 1400, NULL);
+}
+
+TunDevice::~TunDevice()
+{
+  if(dev_)
+    close_tun(dev_);
+}
+
+short TunDevice::read(u_int8_t* buf, u_int32_t len)
+{
+  if(!dev_)
+    return -1;
+
+  struct pollfd pfd[1];
+  pfd[0].fd = tun_event_handle(dev_);
+  pfd[0].events = POLLIN | POLLPRI;
+  pfd[0].revents = 0;
+  poll(pfd, 1, -1);
+  Lock lock(io_mutex_);
+  return read_tun(dev_, buf, len);
+}
+
+int TunDevice::write(u_int8_t* buf, u_int32_t len)
+{
+  if(!dev_)
+    return -1;
+  Lock lock(io_mutex_);
+  return write_tun(dev_, buf, len);
+}
+
+char* TunDevice::getActualName()
+{
+  if(!dev_)
+    return NULL;
+
+  return dev_->actual_name;
+}
+
+u_int32_t TunDevice::getType()
+{
+  if(!dev_)
+    return TYPE_UNDEF;
+  
+  switch(dev_->type)
+  {
+  case DEV_TYPE_TUN: return TYPE_TUN;
+  case DEV_TYPE_TAP: return TYPE_TAP;
+  }
+  return TYPE_UNDEF;
+}
+
+const char* TunDevice::getTypeString()
+{
+  if(!dev_)
+    return NULL;
+  
+  switch(dev_->type)
+  {
+  case DEV_TYPE_UNDEF: return "undef"; break;
+  case DEV_TYPE_TUN: return "tun"; break;
+  case DEV_TYPE_TAP: return "tap"; break;
+  }
+  return NULL;
+}
diff --git a/src/ovpn/tunDevice.h b/src/ovpn/tunDevice.h
new file mode 100644
index 0000000..af08132
--- /dev/null
+++ b/src/ovpn/tunDevice.h
@@ -0,0 +1,66 @@
+/*
+ *  anytun
+ *
+ *  The secure anycast tunneling protocol (satp) defines a protocol used
+ *  for communication between any combination of unicast and anycast
+ *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
+ *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
+ *  ethernet, ip, arp ...). satp directly includes cryptography and
+ *  message authentication based on the methodes used by SRTP.  It is
+ *  intended to deliver a generic, scaleable and secure solution for
+ *  tunneling and relaying of packets of any protocol.
+ *
+ *
+ *  Copyright (C) 2007 anytun.org <satp@wirdorange.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program (see the file COPYING included with this
+ *  distribution); if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _TUNDEVICE_H_
+#define _TUNDEVICE_H_
+
+#include "buffer.h"
+#include "threadUtils.hpp"
+
+class TunDevice
+{
+public:
+  static const u_int32_t TYPE_UNDEF = 0;
+  static const u_int32_t TYPE_TUN = 1;
+  static const u_int32_t TYPE_TAP = 2;
+
+  TunDevice(const char* dev,const char* dev_type, const char* ifcfg_lp, const char* ifcfg_rnmp);
+  ~TunDevice();
+  
+  void open();
+  void close();
+  bool isOpen();
+
+  short read(u_int8_t* buf, u_int32_t len);
+  int write(u_int8_t* buf, u_int32_t len);
+
+  char* getActualName();
+  u_int32_t getType();
+  const char* getTypeString();
+
+private:
+  void operator=(const TunDevice &src);
+  TunDevice(const TunDevice &src);
+
+  Mutex io_mutex_;
+  struct tuntap *dev_;
+};
+
+#endif