--- gvpe/src/device-tincd.C	2003/10/14 03:59:32	1.2
+++ gvpe/src/device-tincd.C	2003/10/16 13:37:52	1.6
@@ -1,5 +1,6 @@
 /*
     device-tincd.C -- include one of the tincd low level implementations.
+    Copyright (C) 2003 Marc Lehmann <pcg@goof.com>
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -29,6 +30,12 @@
 
 #include "conf.h"
 
+// following headers used by cygwin (maybe others)
+#include "netcompat.h"
+#include <signal.h>
+
+#define xstrdup(strd) strdup(str)
+
 /* make the tincd sources feel comfortable in our environment. */
 /* this was reasonably easy to do. */
 #define routing_mode 1
@@ -86,24 +93,43 @@
 
 #if IF_linux
 # include "tincd/linux/device.c"
+
 #elif IF_freebsd
 # include "tincd/freebsd/device.c"
+
 #elif IF_netbsd
+#define IF_istun 1
 # include "tincd/netbsd/device.c"
+
+#elif IF_openbsd
+#define IF_istun 1
+# include "tincd/openbsd/device.c"
+
 #elif IF_solaris
 # include "tincd/solaris/device.c"
+
 #elif IF_cygwin
 # include "tincd/cygwin/device.c"
+
 #elif IF_mingw
 # include "tincd/mingw/device.c"
+
 #elif IF_darwin
+#define IF_istun 1
 # include "tincd/darwin/device.c"
+
 #elif IF_raw_socket
+#define IF_istun 1
 # include "tincd/raw_socket/device.c"
+
 #else
 # error No interface implementation for your IFTYPE/IFSUBTYPE combination.
 #endif
 
+#if IF_istun
+# include "ether_emu.C"
+#endif
+
 const char *
 tap_device::info ()
 {
@@ -145,13 +171,29 @@
       return 0;
     }
     
+#if IF_istun
+  // assume ipv4
+  (*pkt)[12] = 0x08;
+  (*pkt)[13] = 0x00;
+
+  if (!ether_emu.tun_to_tap (pkt))
+  {
+    delete pkt;
+    return 0;
+  }
+#endif
+
   return pkt;
 }
 
 void
 tap_device::send (tap_packet *pkt)
 {
-  if (!write_packet (reinterpret_cast<vpn_packet_t *>(pkt)))
+  if (
+#if IF_istun
+      ether_emu.tap_to_tun (pkt) &&
+#endif
+      !write_packet (reinterpret_cast<vpn_packet_t *>(pkt)))
     slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE,
           strerror (errno));
 }