openvpn_no_ipv6.patch

--- a/src/openvpn/options.c
+++ b/src/openvpn/options.c
@@ -4476,7 +4476,17 @@ add_option (struct options *options,
   else if (streq (p[0], "tun-ipv6"))
     {
       VERIFY_PERMISSION (OPT_P_UP);
-      options->tun_ipv6 = true;
+      FILE *disable_ipv6 = fopen("/proc/sys/net/ipv6/conf/all/disable_ipv6", "r");
+      if (disable_ipv6)
+        {
+     char status;
+     if (fread(&status, 1, 1, disable_ipv6) == 1)
+       {
+         if (status == '0')
+       options->tun_ipv6 = true;
+       }
+     fclose(disable_ipv6);
+   }
     }
 #ifdef ENABLE_IPROUTE
   else if (streq (p[0], "iproute") && p[1])