added device for bsd

tested under openbsd but should work on freebsd and netbsd as well
TODO: do_ifconfig

1 files changed, 255 insertions, 0 deletions

diff --git a/src/bsd/tunDevice.cpp b/src/bsd/tunDevice.cpp
new file mode 100644
index 0000000..47558de
--- /dev/null
+++ b/src/bsd/tunDevice.cpp
@@ -0,0 +1,255 @@
+/*
+ *  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 <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <net/if_tun.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <netinet/in_systm.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+
+#include <sstream>
+
+#include "tunDevice.h"
+#include "threadUtils.hpp"
+#define DEVICE_FILE_MAX 255
+
+#include <iostream>
+
+TunDevice::TunDevice(const char* dev_name, const char* dev_type, const char* ifcfg_lp, const char* ifcfg_rnmp) : conf_(dev_name, dev_type, ifcfg_lp, ifcfg_rnmp)
+{
+  std::string device_file = "/dev/";
+  bool dynamic = true;
+  if(dev_name) {
+    device_file.append(dev_name);
+    dynamic = false;
+  }
+  else if(conf_.type_ == TYPE_TUN) {
+    device_file.append("tun");
+    actual_name_ = "tun";
+  }
+  else if(conf_.type_ == TYPE_TAP) {
+    device_file.append("tap");
+    actual_name_ = "tap";
+  }
+  else
+    throw std::runtime_error("unable to recognize type of device (tun or tap)");
+
+  u_int32_t dev_id=0;
+  if(dynamic) {
+    for(; dev_id <= DEVICE_FILE_MAX; ++dev_id) {
+      std::ostringstream ds;
+      ds << device_file;
+      ds << dev_id;
+      fd_ = ::open(ds.str().c_str(), O_RDWR);
+      if(fd_ >= 0)
+        break;
+    }
+  }
+  else
+    fd_ = ::open(device_file.c_str(), O_RDWR);
+
+  if(fd_ < 0) {
+    std::string msg;
+    if(dynamic)
+      msg = "can't open device file dynamically: no unused node left";
+    else {
+      msg = "can't open device file (";
+      msg.append(device_file);
+      msg.append("): ");
+      msg.append(strerror(errno));
+    }
+    throw std::runtime_error(msg);
+  }
+
+  if(dynamic) {
+    std::stringstream s;
+    s << actual_name_;
+    s << dev_id;
+    actual_name_ = s.str();
+  }
+  else
+    actual_name_ = dev_name;
+  
+  init_post();
+
+  if(ifcfg_lp && ifcfg_rnmp)
+    do_ifconfig();
+}
+
+TunDevice::~TunDevice()
+{
+  if(fd_ > 0)
+    ::close(fd_);
+}
+
+#if defined(__GNUC__) && defined(__OpenBSD__)
+
+void TunDevice::init_post()
+{
+  with_type_ = true;
+  if(conf_.type_ == TYPE_TAP)
+    with_type_ = false;
+  
+  struct tuninfo ti;  
+
+  if (ioctl(fd_, TUNGIFINFO, &ti) < 0)
+    throw std::runtime_error("can't enable multicast for interface");
+  
+  ti.flags |= IFF_MULTICAST;
+  
+  if (ioctl(fd_, TUNSIFINFO, &ti) < 0)
+    throw std::runtime_error("can't enable multicast for interface");
+}
+
+#elif defined(__GNUC__) && defined(__FreeBSD__)
+
+void TunDevice::init_post()
+{
+  with_type_ = true;
+  if(conf_.type_ == TYPE_TAP)
+    with_type_ = false;
+
+  int arg = 0;
+  ioctl(fd_, TUNSLMODE, &arg);
+  arg = 1;
+  ioctl(fd_, TUNSIFHEAD, &arg);
+}
+
+#elif defined(__GNUC__) && defined(__NetBSD__)
+
+void TunDevice::init_post()
+{
+  with_type_ = false;
+
+  int arg = IFF_POINTOPOINT|IFF_MULTICAST;
+  ioctl(fd_, TUNSIFMODE, &arg);
+  arg = 0;
+  ioctl(fd_, TUNSLMODE, &arg);
+}
+
+#else
+ #error Target not supported
+#endif
+
+
+short TunDevice::read(u_int8_t* buf, u_int32_t len)
+{
+  if(fd_ < 0)
+    return -1;
+  
+  if(with_type_) {
+    struct iovec iov[2];
+    u_int32_t type;
+    
+    iov[0].iov_base = &type;
+    iov[0].iov_len = sizeof(type);
+    iov[1].iov_base = buf;
+    iov[1].iov_len = len;
+    return(::readv(fd_, iov, 2) - sizeof(type));
+  }
+  else
+    return(::read(fd_, buf, len));
+}
+
+int TunDevice::write(u_int8_t* buf, u_int32_t len)
+{
+  if(fd_ < 0)
+    return -1;
+  
+  if(with_type_) {
+    struct iovec iov[2];
+    u_int32_t type;
+    struct ip *hdr = reinterpret_cast<struct ip*>(buf);
+    
+    type = 0;
+    if(hdr->ip_v == 4)
+      type = htonl(AF_INET);
+    else
+      type = htonl(AF_INET6);
+    
+    iov[0].iov_base = &type;
+    iov[0].iov_len = sizeof(type);
+    iov[1].iov_base = buf;
+    iov[1].iov_len = len;
+    return(::writev(fd_, iov, 2) - sizeof(type));
+  }
+  else
+    return(::write(fd_, buf, len));
+}
+
+const char* TunDevice::getActualName()
+{
+  return actual_name_.c_str();
+}
+
+device_type_t TunDevice::getType()
+{
+  return conf_.type_;
+}
+
+const char* TunDevice::getTypeString()
+{
+  if(fd_ < 0)
+    return NULL;
+
+  switch(conf_.type_)
+  {
+  case TYPE_UNDEF: return "undef"; break;
+  case TYPE_TUN: return "tun"; break;
+  case TYPE_TAP: return "tap"; break;
+  }
+  return NULL;
+}
+
+void TunDevice::do_ifconfig()
+{
+//   std::string command("/sbin/ifconfig ");
+//   command.append(actual_name_);
+//   command.append(" ");
+//   command.append(conf_.local_.toString());
+//   command.append(" ");
+
+//   if(conf_.type_ == TYPE_TUN)
+//     command.append("pointopoint ");
+//   else
+//     command.append("netmask ");
+
+//   command.append(conf_.remote_netmask_.toString());
+//   command.append(" mtu 1400");
+
+//   system(command.c_str());
+}