- fixes, intendation

[oweals/gnunet.git] / src / gns / w32nsp-install.c

diff --git a/src/gns/w32nsp-install.c b/src/gns/w32nsp-install.c
index 5c2ccf23e1a6ddaee3c363b21a365ba8bd6c5ab0..698f2d6d50d83fa856e87a7898cd579d369855ba 100644 (file)
--- a/src/gns/w32nsp-install.c
+++ b/src/gns/w32nsp-install.c
@@ -1,6 +1,6 @@
 /*
      This file is part of GNUnet.
-     (C) 2012 Christian Grothoff (and other contributing authors)
+     Copyright (C) 2012 Christian Grothoff (and other contributing authors)
 
      GNUnet is free software; you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published
@@ -24,9 +24,9 @@
  */
 
 #define INITGUID
+#include <ws2spi.h>
 #include <windows.h>
 #include <nspapi.h>
-#include <ws2spi.h>
 #include "gnunet_w32nsp_lib.h"
 #include <stdio.h>
 
@@ -40,42 +40,104 @@ main (int argc, char **argv)
   wchar_t *cmdl;
   int wargc;
   wchar_t **wargv;
+  /* Allocate a 4K buffer to retrieve all the namespace providers */
+  DWORD dwInitialBufferLen = 4096;
+  DWORD dwBufferLen;
+  WSANAMESPACE_INFO *pi;
+  int p_count;
+  int i;
 
-  if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
+  if (WSAStartup (MAKEWORD (2,2), &wsd) != 0)
   {
-    fprintf (stderr, "WSAStartup() failed: %lu\n", GetLastError());
+    fprintf (stderr, "WSAStartup () failed: %lu\n", GetLastError ());
     return 5;
   }
 
+  dwBufferLen = dwInitialBufferLen;
+  pi = malloc (dwBufferLen);
+  if (NULL == pi)
+  {
+    fprintf (stderr, "malloc (%lu) failed: %d\n", dwBufferLen, errno);
+    WSACleanup ();
+    return 6;
+  }
+  p_count = WSAEnumNameSpaceProviders (&dwBufferLen, pi);
+  if (SOCKET_ERROR == p_count)
+  {
+    DWORD err = GetLastError ();
+    if (WSAEFAULT == err && dwBufferLen != dwInitialBufferLen)
+    {
+      free (pi);
+
+      pi = malloc (dwBufferLen);
+      if (pi == NULL)
+      {
+        fprintf (stderr, "malloc (%lu) failed: %d\n", dwBufferLen, errno);
+        WSACleanup ();
+        return 6;
+      }
+
+      p_count = WSAEnumNameSpaceProviders (&dwBufferLen, pi);
+      if (SOCKET_ERROR == p_count)
+      {
+        fprintf (stderr, "WSAEnumNameSpaceProviders (&%lu, %p) failed: %lu\n", dwBufferLen, pi, GetLastError ());
+        free (pi);
+        WSACleanup ();
+        return 7;
+      }
+    }
+    else
+    {
+      fprintf (stderr, "WSAEnumNameSpaceProviders (&%lu, %p) failed: %lu\n", dwBufferLen, pi, GetLastError ());
+      free (pi);
+      WSACleanup ();
+      return 8;
+    }
+  }
+  for (i= 0; i < p_count; i++)
+  {
+    if (IsEqualGUID (&pi[i].NSProviderId, &id))
+    {
+      fprintf (stderr, "GNUnet DNS provider is already installed\n");
+      free (pi);
+      WSACleanup ();
+      return 0;
+    }
+  }
+  free (pi);
+
   cmdl = GetCommandLineW ();
   if (cmdl == NULL)
   {
-    WSACleanup();
+    WSACleanup ();
     return 2;
   }
   wargv = CommandLineToArgvW (cmdl, &wargc);
   if (wargv == NULL)
   {
-    WSACleanup();
+    WSACleanup ();
     return 3;
   }
   r = 4;
 
   if (wargc == 2)
   {
-    ret = WSCInstallNameSpace (L"GNUnet DNS provider", wargv[1], NS_DNS, 1, &id);
+    ret = WSCInstallNameSpace (L"GNUnet DNS provider", wargv[1], NS_DNS, 0, &id);
     if (ret == NO_ERROR)
     {
+      fprintf (stderr, "Installed GNUnet DNS provider\n");
       r = 0;
     }
     else
     {
       r = 1;
       fprintf (stderr,
-          "WSCInstallNameSpace(L\"GNUnet DNS provider\", \"%S\", %d, 0, %p) failed: %lu\n",
+          "WSCInstallNameSpace (L\"GNUnet DNS provider\", \"%S\", %d, 0, %p) failed: %lu\n",
           wargv[1], NS_DNS, &id, GetLastError ());
     }
   }
-  WSACleanup();
+  else
+    fprintf (stderr, "Usage: %S <path-to-libw32nsp>\n", wargv[0]);
+  WSACleanup ();
   return r;
 }