[GNUnet-SVN] r25209 - gnunet/src/vpn

[gnunet]

Author: cfuchs
Date: 2012-12-03 23:58:19 +0100 (Mon, 03 Dec 2012)
New Revision: 25209

Modified:
   gnunet/src/vpn/gnunet-helper-vpn-windows.c
Log:
Added logics to install virtual networks interfaces for gnunet-vpn in 
win32 based on the info that can be found in the MSDN.

Current revision: 
http://msdn.microsoft.com/en-us/library/windows/hardware/ff549791%28v=vs.85%29.aspx



Modified: gnunet/src/vpn/gnunet-helper-vpn-windows.c
===================================================================
--- gnunet/src/vpn/gnunet-helper-vpn-windows.c  2012-12-03 20:03:37 UTC (rev 
25208)
+++ gnunet/src/vpn/gnunet-helper-vpn-windows.c  2012-12-03 22:58:19 UTC (rev 
25209)
@@ -16,7 +16,7 @@
      along with GNUnet; see the file COPYING.  If not, write to the
      Free Software Foundation, Inc., 59 Temple Place - Suite 330,
      Boston, MA 02111-1307, USA.
-*/
+ */
 
 /**
  * @file vpn/gnunet-helper-vpn-windows.c
@@ -31,8 +31,18 @@
  *
  */
 
+#include <stdio.h>
+#include <windows.h>
+#include <setupapi.h>
 #include "platform.h"
 
+//#include <tchar.h>
+//#include <stdlib.h>
+//#include <regstr.h>
+//#include <string.h>
+//#include <malloc.h>
+//#include <objbase.h>
+
 /**
  * Need 'struct GNUNET_MessageHeader'.
  */
@@ -54,6 +64,20 @@
  */
 #define MAX_SIZE 65536
 
+/** 
+ * This is our own local instance of a virtual network interface
+ * It is (somewhat) equivalent to using tun/tap in unixoid systems
+ * 
+ * Upon initialization, we create such an device node.
+ * Upon termination, we remove it again.
+ * 
+ * If we crash this device might stay around.
+ */
+HDEVINFO DeviceInfo = INVALID_HANDLE_VALUE;
+SP_DEVINFO_DATA DeviceNode;
+TCHAR class[128];
+GUID guid;
+
 /**
  * Creates a tun-interface called dev;
  *
@@ -67,17 +91,16 @@
   int fd;
 
   if (NULL == dev)
-  {
-    errno = EINVAL;
-    return -1;
-  }
+    {
+      errno = EINVAL;
+      return -1;
+    }
 
   /* Hello, I am a stub function! I did my job, yay me! */
-  
+
   return fd;
 }
 
-
 /**
  * @brief Sets the IPv6-Address given in address on the interface dev
  *
@@ -88,7 +111,7 @@
 static void
 set_address6 (const char *dev, const char *address, unsigned long prefix_len)
 {
-  int fd=0;
+  int fd = 0;
 
   /*
    * parse the new address
@@ -113,13 +136,12 @@
 
 
   if (0 != close (fd))
-  {
-    fprintf (stderr, "close failed: %s\n", strerror (errno));
-    exit (1);
-  }
+    {
+      fprintf (stderr, "close failed: %s\n", strerror (errno));
+      exit (1);
+    }
 }
 
-
 /**
  * @brief Sets the IPv4-Address given in address on the interface dev
  *
@@ -130,7 +152,7 @@
 static void
 set_address4 (const char *dev, const char *address, const char *mask)
 {
-  int fd=0;
+  int fd = 0;
 
   /*
    * Parse the address
@@ -161,14 +183,120 @@
 
 
   if (0 != close (fd))
-  {
-    fprintf (stderr, "close failed: %s\n", strerror (errno));
-    (void) close (fd);
-    exit (1);
-  }
+    {
+      fprintf (stderr, "close failed: %s\n", strerror (errno));
+      (void) close (fd);
+      exit (1);
+    }
 }
 
+static boolean
+setup_interface ()
+{
+  /*
+   * where to find our inf-file. (+ the "full" path, after windows found")
+   * 
+   * We do not directly input all the props here, because openvpn will update
+   * these details over time.
+   */
+  TCHAR InfFile[] = "tapw32.inf";
+  TCHAR hwid[] = "TAP0901";
+  TCHAR * InfFilePath;
+  TCHAR * hwIdList;
 
+  /** 
+   * Locate the inf-file, we need to store it somewhere where the system can
+   * find it. A good choice would be CWD/PDW or %WINDIR$\system32\
+   * 
+   * TODO: Finde a more sane way to do this!
+   */
+  
+  InfFilePath = calloc (MAX_PATH, sizeof (TCHAR));
+  if (InfFilePath == NULL)
+    {
+      return FALSE;
+    }
+  GetFullPathName (InfFile, MAX_PATH, InfFilePath, NULL);
+
+  /** 
+   * Set the device's hardware ID and add it to a list.
+   * This information will later on identify this device in registry. 
+   * 
+   * TODO: Currently we just use TAP0901 as HWID, 
+   * but we might want to add additional information
+   */
+  hwIdList = calloc (LINE_LEN + 4, sizeof (TCHAR));
+  if (hwIdList == NULL)
+    {
+      goto cleanup1;
+    }
+  strncpy (hwIdList, hwid, LINE_LEN);
+
+  /** 
+   * Bootstrap our device info using the drivers inf-file
+   */
+  if (!SetupDiGetINFClass (InfFilePath,
+                           &guid,
+                           class, sizeof (class) / sizeof (TCHAR),
+                           NULL))
+    {
+      goto cleanup2;
+    }
+
+  /** 
+   * Collect all the other needed information... 
+   * let the system fill our this form 
+   */
+  DeviceInfo = SetupDiCreateDeviceInfoList (&guid, NULL);
+  if (DeviceInfo == INVALID_HANDLE_VALUE)
+    {
+      goto cleanup3;
+    }
+  DeviceNode.cbSize = sizeof (SP_DEVINFO_DATA);
+  if (!SetupDiCreateDeviceInfo (DeviceInfo,
+                                class,
+                                &guid,
+                                NULL,
+                                NULL,
+                                DICD_GENERATE_ID,
+                                &DeviceNode))
+    {
+      goto cleanup3;
+    }
+  
+  /* Deploy all the information collected into the registry */
+  if (!SetupDiSetDeviceRegistryProperty (DeviceInfo,
+                                         &DeviceNode,
+                                         SPDRP_HARDWAREID,
+                                         (LPBYTE) hwIdList,
+                                         (lstrlen (hwIdList) + 2) * sizeof 
(TCHAR)))
+    {
+      goto cleanup3;
+    }
+  /* Install our new class(=device) into the system */
+  if (!SetupDiCallClassInstaller (DIF_REGISTERDEVICE,
+                                  DeviceInfo,
+                                  &DeviceNode))
+    {
+      goto cleanup3;
+    }
+
+  return TRUE;
+
+  //disabled for debug-reasons...
+cleanup3:
+  //GNUNET_free(DeviceInfo);
+  ;
+cleanup2:
+  //GNUNET_free(hwIdList);
+  ;
+cleanup1:
+  //GNUNET_free(InfFilePath);
+  ;
+  return FALSE;
+
+}
+
 /**
  * Start forwarding to and from the tunnel.
  *
@@ -194,7 +322,6 @@
   /* Hello, I am a stub function! I did my job, yay me! */
 }
 
-
 /**
  * Open VPN tunnel interface.
  *
@@ -206,6 +333,7 @@
  *             4: IPv4 address (1.2.3.4), "-" to disable
  *             5: IPv4 netmask (255.255.0.0), ignored if #4 is "-"
  */
+
 int
 main (int argc, char **argv)
 {
@@ -214,49 +342,54 @@
   int global_ret;
 
   if (6 != argc)
-  {
-    fprintf (stderr, "Fatal: must supply 5 arguments!\n");
-    return 1;
-  }
+    {
+      fprintf (stderr, "Fatal: must supply 5 arguments!\n");
+      return 1;
+    }
 
   /*
    * strncpy (dev, argv[1], IFNAMSIZ);
    * dev[IFNAMSIZ - 1] = '\0';
    */
-/*  if (-1 == (fd_tun = init_tun (dev)))
-  {
-    fprintf (stderr, "Fatal: could not initialize tun-interface  with IPv6 
%s/%s and IPv4 %s/%s\n",
-            dev,
-            argv[2],
-            argv[3],
-            argv[4],
-            argv[5]);
-    return 1;
-  }
- */ 
+  /*  if (-1 == (fd_tun = init_tun (dev)))
+    {
+      fprintf (stderr, "Fatal: could not initialize tun-interface  with IPv6 
%s/%s and IPv4 %s/%s\n",
+               dev,
+               argv[2],
+               argv[3],
+               argv[4],
+               argv[5]);
+      return 1;
+    }
+   */
 
   if (0 != strcmp (argv[2], "-"))
-  {
-    const char *address = argv[2];
-    long prefix_len = atol (argv[3]);
+    {
+      const char *address = argv[2];
+      long prefix_len = atol (argv[3]);
 
-    if ((prefix_len < 1) || (prefix_len > 127))
+      if ((prefix_len < 1) || (prefix_len > 127))
+        {
+          fprintf (stderr, "Fatal: prefix_len out of range\n");
+          return 1;
+        }
+
+      //set_address6 (dev, address, prefix_len);
+    }
+
+  if (0 != strcmp (argv[4], "-"))
     {
-      fprintf (stderr, "Fatal: prefix_len out of range\n");
-      return 1;
+      const char *address = argv[4];
+      const char *mask = argv[5];
+
+      set_address4 (NULL, address, mask);
     }
 
-    //set_address6 (dev, address, prefix_len);
-  }
+  if (setup_interface ())
+    {
+      ;
+    }
 
-  if (0 != strcmp (argv[4], "-"))
-  {
-    const char *address = argv[4];
-    const char *mask = argv[5];
-
-    set_address4 (NULL, address, mask);
-  }
-  
   /*
   uid_t uid = getuid ();
   if (0 != setresuid (uid, uid, uid))
@@ -265,7 +398,7 @@
     global_ret = 2;
     goto cleanup;
   }
- */
+   */
 
   /*if (SIG_ERR == signal (SIGPIPE, SIG_IGN))
   {
@@ -273,10 +406,10 @@
              strerror (errno));
     // no exit, we might as well die with SIGPIPE should it ever happen 
   }
-  */
+   */
   //run (fd_tun);
   global_ret = 0;
- cleanup:
+cleanup:
   //close (fd_tun);
   return global_ret;
 }