Merge branch 'upstream' into develop

13 files changed, 3377 insertions, 0 deletions

diff --git a/src/tapctl/Makefile.am b/src/tapctl/Makefile.am
new file mode 100644
index 0000000..7ebbbf2
--- /dev/null
+++ b/src/tapctl/Makefile.am
@@ -0,0 +1,51 @@
+#
+#  tapctl -- Utility to manipulate TUN/TAP interfaces on Windows
+#
+#  Copyright (C) 2002-2021 OpenVPN Inc <sales@openvpn.net>
+#  Copyright (C) 2018-2021 Simon Rozman <simon@rozman.si>
+#
+#  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; if not, write to the Free Software Foundation, Inc.,
+#  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+
+include $(top_srcdir)/build/ltrc.inc
+
+MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
+
+EXTRA_DIST = \
+	tapctl.vcxproj \
+	tapctl.vcxproj.filters \
+	tapctl.props \
+	tapctl.exe.manifest
+
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/include -I$(top_srcdir)/src/compat
+
+AM_CFLAGS = \
+	$(TAP_CFLAGS)
+
+if WIN32
+sbin_PROGRAMS = tapctl
+tapctl_CFLAGS = \
+	-municode -D_UNICODE \
+	-UNTDDI_VERSION -U_WIN32_WINNT \
+	-D_WIN32_WINNT=_WIN32_WINNT_VISTA
+tapctl_LDADD = -ladvapi32 -lole32 -lsetupapi
+endif
+
+tapctl_SOURCES = \
+	basic.h \
+	error.c error.h \
+	main.c \
+	tap.c tap.h \
+	tapctl_resources.rc
diff --git a/src/tapctl/Makefile.in b/src/tapctl/Makefile.in
new file mode 100644
index 0000000..00e3f08
--- /dev/null
+++ b/src/tapctl/Makefile.in
@@ -0,0 +1,831 @@
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+# @configure_input@
+
+# Copyright (C) 1994-2020 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+#
+#  tapctl -- Utility to manipulate TUN/TAP interfaces on Windows
+#
+#  Copyright (C) 2002-2021 OpenVPN Inc <sales@openvpn.net>
+#  Copyright (C) 2018-2021 Simon Rozman <simon@rozman.si>
+#
+#  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; if not, write to the Free Software Foundation, Inc.,
+#  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+
+#
+#  OpenVPN -- An application to securely tunnel IP networks
+#             over a single UDP port, with support for SSL/TLS-based
+#             session authentication and key exchange,
+#             packet encryption, packet authentication, and
+#             packet compression.
+#
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+#
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+NORMAL_UNINSTALL = :
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+host_triplet = @host@
+@WIN32_TRUE@sbin_PROGRAMS = tapctl$(EXEEXT)
+subdir = src/tapctl
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+
+LTRCCOMPILE = $(LIBTOOL) --mode=compile --tag=RC $(RCCOMPILE)
+MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
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+	tapctl.vcxproj \
+	tapctl.vcxproj.filters \
+	tapctl.props \
+	tapctl.exe.manifest
+
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/include -I$(top_srcdir)/src/compat
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+AM_CFLAGS = \
+	$(TAP_CFLAGS)
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+@WIN32_TRUE@	-municode -D_UNICODE \
+@WIN32_TRUE@	-UNTDDI_VERSION -U_WIN32_WINNT \
+@WIN32_TRUE@	-D_WIN32_WINNT=_WIN32_WINNT_VISTA
+
+@WIN32_TRUE@tapctl_LDADD = -ladvapi32 -lole32 -lsetupapi
+tapctl_SOURCES = \
+	basic.h \
+	error.c error.h \
+	main.c \
+	tap.c tap.h \
+	tapctl_resources.rc
+
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+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(sbindir)' && rm -f" $$files ")"; \
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+tapctl-main.obj: main.c
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+
+tapctl-tap.o: tap.c
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+
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+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
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+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
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+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
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+maintainer-clean-generic:
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+	@echo "it deletes files that may require special tools to rebuild."
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+	-rm -f ./$(DEPDIR)/tapctl-main.Po
+	-rm -f ./$(DEPDIR)/tapctl-tap.Po
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+		-rm -f ./$(DEPDIR)/tapctl-error.Po
+	-rm -f ./$(DEPDIR)/tapctl-main.Po
+	-rm -f ./$(DEPDIR)/tapctl-tap.Po
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+	ctags ctags-am distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
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+	install-ps install-ps-am install-sbinPROGRAMS install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am uninstall-sbinPROGRAMS
+
+.PRECIOUS: Makefile
+
+
+.rc.lo:
+	$(LTRCCOMPILE) -i "$<" -o "$@"
+
+.rc.o:
+	$(RCCOMPILE) -i "$<" -o "$@"
+
+.mc.rc:
+	$(WINDMC) "$<"
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/tapctl/basic.h b/src/tapctl/basic.h
new file mode 100644
index 0000000..3de237d
--- /dev/null
+++ b/src/tapctl/basic.h
@@ -0,0 +1,66 @@
+/*
+ *  basic -- Basic macros
+ *           https://community.openvpn.net/openvpn/wiki/Tapctl
+ *
+ *  Copyright (C) 2002-2021 OpenVPN Inc <sales@openvpn.net>
+ *  Copyright (C) 2018-2021 Simon Rozman <simon@rozman.si>
+ *
+ *  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; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef BASIC_H
+#define BASIC_H
+
+#ifdef _UNICODE
+#define PRIsLPTSTR      "ls"
+#define PRIsLPOLESTR    "ls"
+#else
+#define PRIsLPTSTR      "s"
+#define PRIsLPOLESTR    "ls"
+#endif
+#define PRIXGUID        "{%08lX-%04hX-%04hX-%02hhX%02hhX-%02hhX%02hhX%02hhX%02hhX%02hhX%02hhX}"
+#define PRIGUID_PARAM(g) \
+    (g).Data1, (g).Data2, (g).Data3, (g).Data4[0], (g).Data4[1], (g).Data4[2], (g).Data4[3], (g).Data4[4], (g).Data4[5], (g).Data4[6], (g).Data4[7]
+#define PRIGUID_PARAM_REF(g) \
+    &(g).Data1, &(g).Data2, &(g).Data3, &(g).Data4[0], &(g).Data4[1], &(g).Data4[2], &(g).Data4[3], &(g).Data4[4], &(g).Data4[5], &(g).Data4[6], &(g).Data4[7]
+
+#define __L(q)          L ## q
+#define _L(q)           __L(q)
+
+#ifndef _In_
+#define _In_
+#endif
+#ifndef _In_opt_
+#define _In_opt_
+#endif
+#ifndef _In_z_
+#define _In_z_
+#endif
+#ifndef _Inout_
+#define _Inout_
+#endif
+#ifndef _Inout_opt_
+#define _Inout_opt_
+#endif
+#ifndef _Out_
+#define _Out_
+#endif
+#ifndef _Out_opt_
+#define _Out_opt_
+#endif
+#ifndef _Out_z_cap_
+#define _Out_z_cap_(n)
+#endif
+
+#endif /* ifndef BASIC_H */
diff --git a/src/tapctl/error.c b/src/tapctl/error.c
new file mode 100644
index 0000000..16662ec
--- /dev/null
+++ b/src/tapctl/error.c
@@ -0,0 +1,36 @@
+/*
+ *  error -- OpenVPN compatible error reporting API
+ *           https://community.openvpn.net/openvpn/wiki/Tapctl
+ *
+ *  Copyright (C) 2002-2021 OpenVPN Inc <sales@openvpn.net>
+ *  Copyright (C) 2018-2021 Simon Rozman <simon@rozman.si>
+ *
+ *  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; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "error.h"
+
+
+/* Globals */
+unsigned int x_debug_level; /* GLOBAL */
+
+
+void
+x_msg(const unsigned int flags, const char *format, ...)
+{
+    va_list arglist;
+    va_start(arglist, format);
+    x_msg_va(flags, format, arglist);
+    va_end(arglist);
+}
diff --git a/src/tapctl/error.h b/src/tapctl/error.h
new file mode 100644
index 0000000..fa6e3ff
--- /dev/null
+++ b/src/tapctl/error.h
@@ -0,0 +1,97 @@
+/*
+ *  error -- OpenVPN compatible error reporting API
+ *           https://community.openvpn.net/openvpn/wiki/Tapctl
+ *
+ *  Copyright (C) 2002-2021 OpenVPN Inc <sales@openvpn.net>
+ *  Copyright (C) 2018-2021 Simon Rozman <simon@rozman.si>
+ *
+ *  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; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef ERROR_H
+#define ERROR_H
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+/*
+ * These globals should not be accessed directly,
+ * but rather through macros or inline functions defined below.
+ */
+extern unsigned int x_debug_level;
+extern int x_msg_line_num;
+
+/* msg() flags */
+
+#define M_DEBUG_LEVEL     (0x0F)         /* debug level mask */
+
+#define M_FATAL           (1<<4)         /* exit program */
+#define M_NONFATAL        (1<<5)         /* non-fatal error */
+#define M_WARN            (1<<6)         /* call syslog with LOG_WARNING */
+#define M_DEBUG           (1<<7)
+
+#define M_ERRNO           (1<<8)         /* show errno description */
+
+#define M_NOMUTE          (1<<11)        /* don't do mute processing */
+#define M_NOPREFIX        (1<<12)        /* don't show date/time prefix */
+#define M_USAGE_SMALL     (1<<13)        /* fatal options error, call usage_small */
+#define M_MSG_VIRT_OUT    (1<<14)        /* output message through msg_status_output callback */
+#define M_OPTERR          (1<<15)        /* print "Options error:" prefix */
+#define M_NOLF            (1<<16)        /* don't print new line */
+#define M_NOIPREFIX       (1<<17)        /* don't print instance prefix */
+
+/* flag combinations which are frequently used */
+#define M_ERR     (M_FATAL | M_ERRNO)
+#define M_USAGE   (M_USAGE_SMALL | M_NOPREFIX | M_OPTERR)
+#define M_CLIENT  (M_MSG_VIRT_OUT | M_NOMUTE | M_NOIPREFIX)
+
+
+/** Check muting filter */
+bool dont_mute(unsigned int flags);
+
+/* Macro to ensure (and teach static analysis tools) we exit on fatal errors */
+#ifdef _MSC_VER
+#pragma warning(disable: 4127) /* EXIT_FATAL(flags) macro raises "warning C4127: conditional expression is constant" on each non M_FATAL invocation. */
+#endif
+#define EXIT_FATAL(flags) do { if ((flags) & M_FATAL) {_exit(1);}} while (false)
+
+#define HAVE_VARARG_MACROS
+#define msg(flags, ...) do { if (msg_test(flags)) {x_msg((flags), __VA_ARGS__);} EXIT_FATAL(flags); } while (false)
+#ifdef ENABLE_DEBUG
+#define dmsg(flags, ...) do { if (msg_test(flags)) {x_msg((flags), __VA_ARGS__);} EXIT_FATAL(flags); } while (false)
+#else
+#define dmsg(flags, ...)
+#endif
+
+void x_msg(const unsigned int flags, const char *format, ...);     /* should be called via msg above */
+
+void x_msg_va(const unsigned int flags, const char *format, va_list arglist);
+
+/* Inline functions */
+
+static inline bool
+check_debug_level(unsigned int level)
+{
+    return (level & M_DEBUG_LEVEL) <= x_debug_level;
+}
+
+/** Return true if flags represent and enabled, not muted log level */
+static inline bool
+msg_test(unsigned int flags)
+{
+    return check_debug_level(flags) && dont_mute(flags);
+}
+
+#endif /* ifndef ERROR_H */
diff --git a/src/tapctl/main.c b/src/tapctl/main.c
new file mode 100644
index 0000000..73ec40b
--- /dev/null
+++ b/src/tapctl/main.c
@@ -0,0 +1,444 @@
+/*
+ *  tapctl -- Utility to manipulate TUN/TAP adapters on Windows
+ *            https://community.openvpn.net/openvpn/wiki/Tapctl
+ *
+ *  Copyright (C) 2002-2021 OpenVPN Inc <sales@openvpn.net>
+ *  Copyright (C) 2018-2021 Simon Rozman <simon@rozman.si>
+ *
+ *  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; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#elif defined(_MSC_VER)
+#include <config-msvc.h>
+#endif
+#ifdef HAVE_CONFIG_VERSION_H
+#include <config-version.h>
+#endif
+
+#include "tap.h"
+#include "error.h"
+
+#include <objbase.h>
+#include <setupapi.h>
+#include <stdio.h>
+#include <tchar.h>
+
+#ifdef _MSC_VER
+#pragma comment(lib, "ole32.lib")
+#pragma comment(lib, "setupapi.lib")
+#endif
+
+
+const TCHAR title_string[] =
+    TEXT(PACKAGE_NAME) TEXT(" ") TEXT(PACKAGE_VERSION)
+    TEXT(" built on ") TEXT(__DATE__)
+;
+
+static const TCHAR usage_message[] =
+    TEXT("%s\n")
+    TEXT("\n")
+    TEXT("Usage:\n")
+    TEXT("\n")
+    TEXT("tapctl <command> [<command specific options>]\n")
+    TEXT("\n")
+    TEXT("Commands:\n")
+    TEXT("\n")
+    TEXT("create     Create a new TUN/TAP adapter\n")
+    TEXT("list       List TUN/TAP adapters\n")
+    TEXT("delete     Delete specified network adapter\n")
+    TEXT("help       Display this text\n")
+    TEXT("\n")
+    TEXT("Hint: Use \"tapctl help <command>\" to display help for particular command.\n")
+;
+
+static const TCHAR usage_message_create[] =
+    TEXT("%s\n")
+    TEXT("\n")
+    TEXT("Creates a new TUN/TAP adapter\n")
+    TEXT("\n")
+    TEXT("Usage:\n")
+    TEXT("\n")
+    TEXT("tapctl create [<options>]\n")
+    TEXT("\n")
+    TEXT("Options:\n")
+    TEXT("\n")
+    TEXT("--name <name>  Set TUN/TAP adapter name. Should the adapter with given name    \n")
+    TEXT("               already exist, an error is returned. If this option is not      \n")
+    TEXT("               specified, a default adapter name is chosen by Windows.         \n")
+    TEXT("               Note: This name can also be specified as OpenVPN's --dev-node   \n")
+    TEXT("               option.                                                         \n")
+    TEXT("--hwid <hwid>  Adapter hardware ID. Default value is root\\tap0901, which       \n")
+    TEXT("               describes tap-windows6 driver. To work with wintun driver,      \n")
+    TEXT("               specify 'wintun'.                                               \n")
+    TEXT("\n")
+    TEXT("Output:\n")
+    TEXT("\n")
+    TEXT("This command prints newly created TUN/TAP adapter's GUID to stdout.            \n")
+;
+
+static const TCHAR usage_message_list[] =
+    TEXT("%s\n")
+    TEXT("\n")
+    TEXT("Lists TUN/TAP adapters\n")
+    TEXT("\n")
+    TEXT("Usage:\n")
+    TEXT("\n")
+    TEXT("tapctl list\n")
+    TEXT("\n")
+    TEXT("Options:\n")
+    TEXT("\n")
+    TEXT("--hwid <hwid>  Adapter hardware ID. By default, root\\tap0901, tap0901 and      \n")
+    TEXT("               wintun adapters are listed. Use this switch to limit the list.  \n")
+    TEXT("\n")
+    TEXT("Output:\n")
+    TEXT("\n")
+    TEXT("This command prints all TUN/TAP adapters to stdout.                            \n")
+;
+
+static const TCHAR usage_message_delete[] =
+    TEXT("%s\n")
+    TEXT("\n")
+    TEXT("Deletes the specified network adapter\n")
+    TEXT("\n")
+    TEXT("Usage:\n")
+    TEXT("\n")
+    TEXT("tapctl delete <adapter GUID | adapter name>\n")
+;
+
+
+/**
+ * Print the help message.
+ */
+static void
+usage(void)
+{
+    _ftprintf(stderr,
+              usage_message,
+              title_string);
+}
+
+
+/**
+ * Program entry point
+ */
+int __cdecl
+_tmain(int argc, LPCTSTR argv[])
+{
+    int iResult;
+    BOOL bRebootRequired = FALSE;
+
+    /* Ask SetupAPI to keep quiet. */
+    SetupSetNonInteractiveMode(TRUE);
+
+    if (argc < 2)
+    {
+        usage();
+        return 1;
+    }
+    else if (_tcsicmp(argv[1], TEXT("help")) == 0)
+    {
+        /* Output help. */
+        if (argc < 3)
+        {
+            usage();
+        }
+        else if (_tcsicmp(argv[2], TEXT("create")) == 0)
+        {
+            _ftprintf(stderr, usage_message_create, title_string);
+        }
+        else if (_tcsicmp(argv[2], TEXT("list")) == 0)
+        {
+            _ftprintf(stderr, usage_message_list, title_string);
+        }
+        else if (_tcsicmp(argv[2], TEXT("delete")) == 0)
+        {
+            _ftprintf(stderr, usage_message_delete, title_string);
+        }
+        else
+        {
+            _ftprintf(stderr, TEXT("Unknown command \"%s\". Please, use \"tapctl help\" to list supported commands.\n"), argv[2]);
+        }
+
+        return 1;
+    }
+    else if (_tcsicmp(argv[1], TEXT("create")) == 0)
+    {
+        LPCTSTR szName = NULL;
+        LPCTSTR szHwId = TEXT("root\\") TEXT(TAP_WIN_COMPONENT_ID);
+
+        /* Parse options. */
+        for (int i = 2; i < argc; i++)
+        {
+            if (_tcsicmp(argv[i], TEXT("--name")) == 0)
+            {
+                szName = argv[++i];
+            }
+            else
+            if (_tcsicmp(argv[i], TEXT("--hwid")) == 0)
+            {
+                szHwId = argv[++i];
+            }
+            else
+            {
+                _ftprintf(stderr, TEXT("Unknown option \"%s\". Please, use \"tapctl help create\" to list supported options. Ignored.\n"), argv[i]);
+            }
+        }
+
+        /* Create TUN/TAP adapter. */
+        GUID guidAdapter;
+        LPOLESTR szAdapterId = NULL;
+        DWORD dwResult = tap_create_adapter(
+            NULL,
+            TEXT("Virtual Ethernet"),
+            szHwId,
+            &bRebootRequired,
+            &guidAdapter);
+        if (dwResult != ERROR_SUCCESS)
+        {
+            _ftprintf(stderr, TEXT("Creating TUN/TAP adapter failed (error 0x%x).\n"), dwResult);
+            iResult = 1; goto quit;
+        }
+
+        if (szName)
+        {
+            /* Get existing network adapters. */
+            struct tap_adapter_node *pAdapterList = NULL;
+            dwResult = tap_list_adapters(NULL, NULL, &pAdapterList);
+            if (dwResult != ERROR_SUCCESS)
+            {
+                _ftprintf(stderr, TEXT("Enumerating adapters failed (error 0x%x).\n"), dwResult);
+                iResult = 1; goto create_delete_adapter;
+            }
+
+            /* Check for duplicates. */
+            for (struct tap_adapter_node *pAdapter = pAdapterList; pAdapter; pAdapter = pAdapter->pNext)
+            {
+                if (_tcsicmp(szName, pAdapter->szName) == 0)
+                {
+                    StringFromIID((REFIID)&pAdapter->guid, &szAdapterId);
+                    _ftprintf(stderr, TEXT("Adapter \"%s\" already exists (GUID %") TEXT(PRIsLPOLESTR) TEXT(").\n"), pAdapter->szName, szAdapterId);
+                    CoTaskMemFree(szAdapterId);
+                    iResult = 1; goto create_cleanup_pAdapterList;
+                }
+            }
+
+            /* Rename the adapter. */
+            dwResult = tap_set_adapter_name(&guidAdapter, szName, FALSE);
+            if (dwResult != ERROR_SUCCESS)
+            {
+                StringFromIID((REFIID)&guidAdapter, &szAdapterId);
+                _ftprintf(stderr, TEXT("Renaming TUN/TAP adapter %") TEXT(PRIsLPOLESTR) TEXT(" to \"%s\" failed (error 0x%x).\n"), szAdapterId, szName, dwResult);
+                CoTaskMemFree(szAdapterId);
+                iResult = 1; goto quit;
+            }
+
+            iResult = 0;
+
+create_cleanup_pAdapterList:
+            tap_free_adapter_list(pAdapterList);
+            if (iResult)
+            {
+                goto create_delete_adapter;
+            }
+        }
+
+        /* Output adapter GUID. */
+        StringFromIID((REFIID)&guidAdapter, &szAdapterId);
+        _ftprintf(stdout, TEXT("%") TEXT(PRIsLPOLESTR) TEXT("\n"), szAdapterId);
+        CoTaskMemFree(szAdapterId);
+
+        iResult = 0; goto quit;
+
+create_delete_adapter:
+        tap_delete_adapter(
+            NULL,
+            &guidAdapter,
+            &bRebootRequired);
+        iResult = 1; goto quit;
+    }
+    else if (_tcsicmp(argv[1], TEXT("list")) == 0)
+    {
+        TCHAR szzHwId[0x100] =
+            TEXT("root\\") TEXT(TAP_WIN_COMPONENT_ID) TEXT("\0")
+            TEXT(TAP_WIN_COMPONENT_ID) TEXT("\0")
+            TEXT("Wintun\0");
+
+        /* Parse options. */
+        for (int i = 2; i < argc; i++)
+        {
+            if (_tcsicmp(argv[i], TEXT("--hwid")) == 0)
+            {
+                memset(szzHwId, 0, sizeof(szzHwId));
+                ++i;
+                memcpy_s(szzHwId, sizeof(szzHwId) - 2*sizeof(TCHAR) /*requires double zero termination*/, argv[i], _tcslen(argv[i])*sizeof(TCHAR));
+            }
+            else
+            {
+                _ftprintf(stderr, TEXT("Unknown option \"%s\". Please, use \"tapctl help list\" to list supported options. Ignored.\n"), argv[i]);
+            }
+        }
+
+        /* Output list of adapters with given hardware ID. */
+        struct tap_adapter_node *pAdapterList = NULL;
+        DWORD dwResult = tap_list_adapters(NULL, szzHwId, &pAdapterList);
+        if (dwResult != ERROR_SUCCESS)
+        {
+            _ftprintf(stderr, TEXT("Enumerating TUN/TAP adapters failed (error 0x%x).\n"), dwResult);
+            iResult = 1; goto quit;
+        }
+
+        for (struct tap_adapter_node *pAdapter = pAdapterList; pAdapter; pAdapter = pAdapter->pNext)
+        {
+            LPOLESTR szAdapterId = NULL;
+            StringFromIID((REFIID)&pAdapter->guid, &szAdapterId);
+            _ftprintf(stdout, TEXT("%") TEXT(PRIsLPOLESTR) TEXT("\t%") TEXT(PRIsLPTSTR) TEXT("\n"), szAdapterId, pAdapter->szName);
+            CoTaskMemFree(szAdapterId);
+        }
+
+        iResult = 0;
+        tap_free_adapter_list(pAdapterList);
+    }
+    else if (_tcsicmp(argv[1], TEXT("delete")) == 0)
+    {
+        if (argc < 3)
+        {
+            _ftprintf(stderr, TEXT("Missing adapter GUID or name. Please, use \"tapctl help delete\" for usage info.\n"));
+            return 1;
+        }
+
+        GUID guidAdapter;
+        if (FAILED(IIDFromString(argv[2], (LPIID)&guidAdapter)))
+        {
+            /* The argument failed to covert to GUID. Treat it as the adapter name. */
+            struct tap_adapter_node *pAdapterList = NULL;
+            DWORD dwResult = tap_list_adapters(NULL, NULL, &pAdapterList);
+            if (dwResult != ERROR_SUCCESS)
+            {
+                _ftprintf(stderr, TEXT("Enumerating TUN/TAP adapters failed (error 0x%x).\n"), dwResult);
+                iResult = 1; goto quit;
+            }
+
+            for (struct tap_adapter_node *pAdapter = pAdapterList;; pAdapter = pAdapter->pNext)
+            {
+                if (pAdapter == NULL)
+                {
+                    _ftprintf(stderr, TEXT("\"%s\" adapter not found.\n"), argv[2]);
+                    iResult = 1; goto delete_cleanup_pAdapterList;
+                }
+                else if (_tcsicmp(argv[2], pAdapter->szName) == 0)
+                {
+                    memcpy(&guidAdapter, &pAdapter->guid, sizeof(GUID));
+                    break;
+                }
+            }
+
+            iResult = 0;
+
+delete_cleanup_pAdapterList:
+            tap_free_adapter_list(pAdapterList);
+            if (iResult)
+            {
+                goto quit;
+            }
+        }
+
+        /* Delete the network adapter. */
+        DWORD dwResult = tap_delete_adapter(
+            NULL,
+            &guidAdapter,
+            &bRebootRequired);
+        if (dwResult != ERROR_SUCCESS)
+        {
+            _ftprintf(stderr, TEXT("Deleting adapter \"%s\" failed (error 0x%x).\n"), argv[2], dwResult);
+            iResult = 1; goto quit;
+        }
+
+        iResult = 0; goto quit;
+    }
+    else
+    {
+        _ftprintf(stderr, TEXT("Unknown command \"%s\". Please, use \"tapctl help\" to list supported commands.\n"), argv[1]);
+        return 1;
+    }
+
+quit:
+    if (bRebootRequired)
+    {
+        _ftprintf(stderr, TEXT("A system reboot is required.\n"));
+    }
+
+    return iResult;
+}
+
+
+bool
+dont_mute(unsigned int flags)
+{
+    UNREFERENCED_PARAMETER(flags);
+
+    return true;
+}
+
+
+void
+x_msg_va(const unsigned int flags, const char *format, va_list arglist)
+{
+    /* Output message string. Note: Message strings don't contain line terminators. */
+    vfprintf(stderr, format, arglist);
+    _ftprintf(stderr, TEXT("\n"));
+
+    if ((flags & M_ERRNO) != 0)
+    {
+        /* Output system error message (if possible). */
+        DWORD dwResult = GetLastError();
+        LPTSTR szErrMessage = NULL;
+        if (FormatMessage(
+                FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS,
+                0,
+                dwResult,
+                0,
+                (LPTSTR)&szErrMessage,
+                0,
+                NULL) && szErrMessage)
+        {
+            /* Trim trailing whitespace. Set terminator after the last non-whitespace character. This prevents excessive trailing line breaks. */
+            for (size_t i = 0, i_last = 0;; i++)
+            {
+                if (szErrMessage[i])
+                {
+                    if (!_istspace(szErrMessage[i]))
+                    {
+                        i_last = i + 1;
+                    }
+                }
+                else
+                {
+                    szErrMessage[i_last] = 0;
+                    break;
+                }
+            }
+
+            /* Output error message. */
+            _ftprintf(stderr, TEXT("Error 0x%x: %s\n"), dwResult, szErrMessage);
+
+            LocalFree(szErrMessage);
+        }
+        else
+        {
+            _ftprintf(stderr, TEXT("Error 0x%x\n"), dwResult);
+        }
+    }
+}
diff --git a/src/tapctl/tap.c b/src/tapctl/tap.c
new file mode 100644
index 0000000..dd4a10a
--- /dev/null
+++ b/src/tapctl/tap.c
@@ -0,0 +1,1367 @@
+/*
+ *  tapctl -- Utility to manipulate TUN/TAP adapters on Windows
+ *            https://community.openvpn.net/openvpn/wiki/Tapctl
+ *
+ *  Copyright (C) 2018-2020 Simon Rozman <simon@rozman.si>
+ *
+ *  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; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#elif defined(_MSC_VER)
+#include <config-msvc.h>
+#endif
+
+#include "tap.h"
+#include "error.h"
+
+#include <windows.h>
+#include <cfgmgr32.h>
+#include <objbase.h>
+#include <setupapi.h>
+#include <stdio.h>
+#include <tchar.h>
+#include <newdev.h>
+
+#ifdef _MSC_VER
+#pragma comment(lib, "advapi32.lib")
+#pragma comment(lib, "ole32.lib")
+#pragma comment(lib, "setupapi.lib")
+#pragma comment(lib, "newdev.lib")
+#endif
+
+
+const static GUID GUID_DEVCLASS_NET = { 0x4d36e972L, 0xe325, 0x11ce, { 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18 } };
+
+const static TCHAR szAdapterRegKeyPathTemplate[] = TEXT("SYSTEM\\CurrentControlSet\\Control\\Network\\%") TEXT(PRIsLPOLESTR) TEXT("\\%") TEXT(PRIsLPOLESTR) TEXT("\\Connection");
+#define ADAPTER_REGKEY_PATH_MAX (_countof(TEXT("SYSTEM\\CurrentControlSet\\Control\\Network\\")) - 1 + 38 + _countof(TEXT("\\")) - 1 + 38 + _countof(TEXT("\\Connection")))
+
+/**
+ * Dynamically load a library and find a function in it
+ *
+ * @param libname     Name of the library to load
+ * @param funcname    Name of the function to find
+ * @param m           Pointer to a module. On return this is set to the
+ *                    the handle to the loaded library. The caller must
+ *                    free it by calling FreeLibrary() if not NULL.
+ *
+ * @return            Pointer to the function
+ *                    NULL on error -- use GetLastError() to find the error code.
+ *
+ **/
+static void *
+find_function(const WCHAR *libname, const char *funcname, HMODULE *m)
+{
+    WCHAR libpath[MAX_PATH];
+    void *fptr = NULL;
+
+    /* Make sure the dll is loaded from the system32 folder */
+    if (!GetSystemDirectoryW(libpath, _countof(libpath)))
+    {
+       return NULL;
+    }
+
+    size_t len = _countof(libpath) - wcslen(libpath) - 1;
+    if (len < wcslen(libname) + 1)
+    {
+       SetLastError(ERROR_INSUFFICIENT_BUFFER);
+       return NULL;
+    }
+    wcsncat(libpath, L"\\", len);
+    wcsncat(libpath, libname, len-1);
+
+    *m = LoadLibraryW(libpath);
+    if (*m == NULL)
+    {
+       return NULL;
+    }
+    fptr = GetProcAddress(*m, funcname);
+    if (!fptr)
+    {
+       FreeLibrary(*m);
+       *m = NULL;
+       return NULL;
+    }
+    return fptr;
+}
+
+/**
+ * Returns length of string of strings
+ *
+ * @param szz           Pointer to a string of strings (terminated by an empty string)
+ *
+ * @return Number of characters not counting the final zero terminator
+ **/
+static inline size_t
+_tcszlen(_In_z_ LPCTSTR szz)
+{
+    LPCTSTR s;
+    for (s = szz; s[0]; s += _tcslen(s) + 1)
+    {
+    }
+    return s - szz;
+}
+
+
+/**
+ * Checks if string is contained in the string of strings. Comparison is made case-insensitive.
+ *
+ * @param szzHay        Pointer to a string of strings (terminated by an empty string) we are
+ *                      looking in
+ *
+ * @param szNeedle      The string we are searching for
+ *
+ * @return Pointer to the string in szzHay that matches szNeedle is found; NULL otherwise
+ */
+static LPCTSTR
+_tcszistr(_In_z_ LPCTSTR szzHay, _In_z_ LPCTSTR szNeedle)
+{
+    for (LPCTSTR s = szzHay; s[0]; s += _tcslen(s) + 1)
+    {
+        if (_tcsicmp(s, szNeedle) == 0)
+        {
+            return s;
+        }
+    }
+
+    return NULL;
+}
+
+
+/**
+ * Function that performs a specific task on a device
+ *
+ * @param hDeviceInfoSet  A handle to a device information set that contains a device
+ *                      information element that represents the device.
+ *
+ * @param pDeviceInfoData  A pointer to an SP_DEVINFO_DATA structure that specifies the
+ *                      device information element in hDeviceInfoSet.
+ *
+ * @param pbRebootRequired  A pointer to a BOOL flag. If the device requires a system restart,
+ *                      this flag is set to TRUE. Otherwise, the flag is left unmodified. This
+ *                      allows the flag to be globally initialized to FALSE and reused for multiple
+ *                      adapter manipulations.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+typedef DWORD (*devop_func_t)(
+    _In_ HDEVINFO hDeviceInfoSet,
+    _In_ PSP_DEVINFO_DATA pDeviceInfoData,
+    _Inout_ LPBOOL pbRebootRequired);
+
+
+/**
+ * Checks device install parameters if a system reboot is required.
+ *
+ * @param hDeviceInfoSet  A handle to a device information set that contains a device
+ *                      information element that represents the device.
+ *
+ * @param pDeviceInfoData  A pointer to an SP_DEVINFO_DATA structure that specifies the
+ *                      device information element in hDeviceInfoSet.
+ *
+ * @param pbRebootRequired  A pointer to a BOOL flag. If the device requires a system restart,
+ *                      this flag is set to TRUE. Otherwise, the flag is left unmodified. This
+ *                      allows the flag to be globally initialized to FALSE and reused for multiple
+ *                      adapter manipulations.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+static DWORD
+check_reboot(
+    _In_ HDEVINFO hDeviceInfoSet,
+    _In_ PSP_DEVINFO_DATA pDeviceInfoData,
+    _Inout_ LPBOOL pbRebootRequired)
+{
+    if (pbRebootRequired == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    SP_DEVINSTALL_PARAMS devinstall_params = { .cbSize = sizeof(SP_DEVINSTALL_PARAMS) };
+    if (!SetupDiGetDeviceInstallParams(
+            hDeviceInfoSet,
+            pDeviceInfoData,
+            &devinstall_params))
+    {
+        DWORD dwResult = GetLastError();
+        msg(M_NONFATAL | M_ERRNO, "%s: SetupDiGetDeviceInstallParams failed", __FUNCTION__);
+        return dwResult;
+    }
+
+    if ((devinstall_params.Flags & (DI_NEEDREBOOT | DI_NEEDRESTART)) != 0)
+    {
+        *pbRebootRequired = TRUE;
+    }
+
+    return ERROR_SUCCESS;
+}
+
+
+/**
+ * Deletes the device.
+ *
+ * @param hDeviceInfoSet  A handle to a device information set that contains a device
+ *                      information element that represents the device.
+ *
+ * @param pDeviceInfoData  A pointer to an SP_DEVINFO_DATA structure that specifies the
+ *                      device information element in hDeviceInfoSet.
+ *
+ * @param pbRebootRequired  A pointer to a BOOL flag. If the device requires a system restart,
+ *                      this flag is set to TRUE. Otherwise, the flag is left unmodified. This
+ *                      allows the flag to be globally initialized to FALSE and reused for multiple
+ *                      adapter manipulations.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+static DWORD
+delete_device(
+    _In_ HDEVINFO hDeviceInfoSet,
+    _In_ PSP_DEVINFO_DATA pDeviceInfoData,
+    _Inout_ LPBOOL pbRebootRequired)
+{
+    SP_REMOVEDEVICE_PARAMS params =
+    {
+        .ClassInstallHeader =
+        {
+            .cbSize = sizeof(SP_CLASSINSTALL_HEADER),
+            .InstallFunction = DIF_REMOVE,
+        },
+        .Scope = DI_REMOVEDEVICE_GLOBAL,
+        .HwProfile = 0,
+    };
+
+    /* Set class installer parameters for DIF_REMOVE. */
+    if (!SetupDiSetClassInstallParams(
+            hDeviceInfoSet,
+            pDeviceInfoData,
+            &params.ClassInstallHeader,
+            sizeof(SP_REMOVEDEVICE_PARAMS)))
+    {
+        DWORD dwResult = GetLastError();
+        msg(M_NONFATAL | M_ERRNO, "%s: SetupDiSetClassInstallParams failed", __FUNCTION__);
+        return dwResult;
+    }
+
+    /* Call appropriate class installer. */
+    if (!SetupDiCallClassInstaller(
+            DIF_REMOVE,
+            hDeviceInfoSet,
+            pDeviceInfoData))
+    {
+        DWORD dwResult = GetLastError();
+        msg(M_NONFATAL | M_ERRNO, "%s: SetupDiCallClassInstaller(DIF_REMOVE) failed", __FUNCTION__);
+        return dwResult;
+    }
+
+    /* Check if a system reboot is required. */
+    check_reboot(hDeviceInfoSet, pDeviceInfoData, pbRebootRequired);
+    return ERROR_SUCCESS;
+}
+
+
+/**
+ * Changes the device state.
+ *
+ * @param hDeviceInfoSet  A handle to a device information set that contains a device
+ *                      information element that represents the device.
+ *
+ * @param pDeviceInfoData  A pointer to an SP_DEVINFO_DATA structure that specifies the
+ *                      device information element in hDeviceInfoSet.
+ *
+ * @param bEnable       TRUE to enable the device; FALSE to disable.
+ *
+ * @param pbRebootRequired  A pointer to a BOOL flag. If the device requires a system restart,
+ *                      this flag is set to TRUE. Otherwise, the flag is left unmodified. This
+ *                      allows the flag to be globally initialized to FALSE and reused for multiple
+ *                      adapter manipulations.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+static DWORD
+change_device_state(
+    _In_ HDEVINFO hDeviceInfoSet,
+    _In_ PSP_DEVINFO_DATA pDeviceInfoData,
+    _In_ BOOL bEnable,
+    _Inout_ LPBOOL pbRebootRequired)
+{
+    SP_PROPCHANGE_PARAMS params =
+    {
+        .ClassInstallHeader =
+        {
+            .cbSize = sizeof(SP_CLASSINSTALL_HEADER),
+            .InstallFunction = DIF_PROPERTYCHANGE,
+        },
+        .StateChange = bEnable ? DICS_ENABLE : DICS_DISABLE,
+        .Scope = DICS_FLAG_GLOBAL,
+        .HwProfile = 0,
+    };
+
+    /* Set class installer parameters for DIF_PROPERTYCHANGE. */
+    if (!SetupDiSetClassInstallParams(
+            hDeviceInfoSet,
+            pDeviceInfoData,
+            &params.ClassInstallHeader,
+            sizeof(SP_PROPCHANGE_PARAMS)))
+    {
+        DWORD dwResult = GetLastError();
+        msg(M_NONFATAL | M_ERRNO, "%s: SetupDiSetClassInstallParams failed", __FUNCTION__);
+        return dwResult;
+    }
+
+    /* Call appropriate class installer. */
+    if (!SetupDiCallClassInstaller(
+            DIF_PROPERTYCHANGE,
+            hDeviceInfoSet,
+            pDeviceInfoData))
+    {
+        DWORD dwResult = GetLastError();
+        msg(M_NONFATAL | M_ERRNO, "%s: SetupDiCallClassInstaller(DIF_PROPERTYCHANGE) failed", __FUNCTION__);
+        return dwResult;
+    }
+
+    /* Check if a system reboot is required. */
+    check_reboot(hDeviceInfoSet, pDeviceInfoData, pbRebootRequired);
+    return ERROR_SUCCESS;
+}
+
+
+/**
+ * Enables the device.
+ *
+ * @param hDeviceInfoSet  A handle to a device information set that contains a device
+ *                      information element that represents the device.
+ *
+ * @param pDeviceInfoData  A pointer to an SP_DEVINFO_DATA structure that specifies the
+ *                      device information element in hDeviceInfoSet.
+ *
+ * @param pbRebootRequired  A pointer to a BOOL flag. If the device requires a system restart,
+ *                      this flag is set to TRUE. Otherwise, the flag is left unmodified. This
+ *                      allows the flag to be globally initialized to FALSE and reused for multiple
+ *                      adapter manipulations.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+static DWORD
+enable_device(
+    _In_ HDEVINFO hDeviceInfoSet,
+    _In_ PSP_DEVINFO_DATA pDeviceInfoData,
+    _Inout_ LPBOOL pbRebootRequired)
+{
+    return change_device_state(hDeviceInfoSet, pDeviceInfoData, TRUE, pbRebootRequired);
+}
+
+
+/**
+ * Disables the device.
+ *
+ * @param hDeviceInfoSet  A handle to a device information set that contains a device
+ *                      information element that represents the device.
+ *
+ * @param pDeviceInfoData  A pointer to an SP_DEVINFO_DATA structure that specifies the
+ *                      device information element in hDeviceInfoSet.
+ *
+ * @param pbRebootRequired  A pointer to a BOOL flag. If the device requires a system restart,
+ *                      this flag is set to TRUE. Otherwise, the flag is left unmodified. This
+ *                      allows the flag to be globally initialized to FALSE and reused for multiple
+ *                      adapter manipulations.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+static DWORD
+disable_device(
+    _In_ HDEVINFO hDeviceInfoSet,
+    _In_ PSP_DEVINFO_DATA pDeviceInfoData,
+    _Inout_ LPBOOL pbRebootRequired)
+{
+    return change_device_state(hDeviceInfoSet, pDeviceInfoData, FALSE, pbRebootRequired);
+}
+
+
+/**
+ * Reads string value from registry key.
+ *
+ * @param hKey          Handle of the registry key to read from. Must be opened with read
+ *                      access.
+ *
+ * @param szName        Name of the value to read.
+ *
+ * @param pszValue      Pointer to string to retrieve registry value. If the value type is
+ *                      REG_EXPAND_SZ the value is expanded using ExpandEnvironmentStrings().
+ *                      The string must be released with free() after use.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ */
+static DWORD
+get_reg_string(
+    _In_ HKEY hKey,
+    _In_ LPCTSTR szName,
+    _Out_ LPTSTR *pszValue)
+{
+    if (pszValue == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    DWORD dwValueType = REG_NONE, dwSize = 0;
+    DWORD dwResult = RegQueryValueEx(
+        hKey,
+        szName,
+        NULL,
+        &dwValueType,
+        NULL,
+        &dwSize);
+    if (dwResult != ERROR_SUCCESS)
+    {
+        SetLastError(dwResult); /* MSDN does not mention RegQueryValueEx() to set GetLastError(). But we do have an error code. Set last error manually. */
+        msg(M_NONFATAL | M_ERRNO, "%s: enumerating \"%" PRIsLPTSTR "\" registry value failed", __FUNCTION__, szName);
+        return dwResult;
+    }
+
+    switch (dwValueType)
+    {
+        case REG_SZ:
+        case REG_EXPAND_SZ:
+        {
+            /* Read value. */
+            LPTSTR szValue = (LPTSTR)malloc(dwSize);
+            if (szValue == NULL)
+            {
+                msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwSize);
+                return ERROR_OUTOFMEMORY;
+            }
+
+            dwResult = RegQueryValueEx(
+                hKey,
+                szName,
+                NULL,
+                NULL,
+                (LPBYTE)szValue,
+                &dwSize);
+            if (dwResult != ERROR_SUCCESS)
+            {
+                SetLastError(dwResult); /* MSDN does not mention RegQueryValueEx() to set GetLastError(). But we do have an error code. Set last error manually. */
+                msg(M_NONFATAL | M_ERRNO, "%s: reading \"%" PRIsLPTSTR "\" registry value failed", __FUNCTION__, szName);
+                free(szValue);
+                return dwResult;
+            }
+
+            if (dwValueType == REG_EXPAND_SZ)
+            {
+                /* Expand the environment strings. */
+                DWORD
+                    dwSizeExp = dwSize * 2,
+                    dwCountExp =
+#ifdef UNICODE
+                    dwSizeExp / sizeof(TCHAR);
+#else
+                    dwSizeExp / sizeof(TCHAR) - 1;     /* Note: ANSI version requires one extra char. */
+#endif
+                LPTSTR szValueExp = (LPTSTR)malloc(dwSizeExp);
+                if (szValueExp == NULL)
+                {
+                    free(szValue);
+                    msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwSizeExp);
+                    return ERROR_OUTOFMEMORY;
+                }
+
+                DWORD dwCountExpResult = ExpandEnvironmentStrings(
+                    szValue,
+                    szValueExp, dwCountExp
+                    );
+                if (dwCountExpResult == 0)
+                {
+                    msg(M_NONFATAL | M_ERRNO, "%s: expanding \"%" PRIsLPTSTR "\" registry value failed", __FUNCTION__, szName);
+                    free(szValueExp);
+                    free(szValue);
+                    return dwResult;
+                }
+                else if (dwCountExpResult <= dwCountExp)
+                {
+                    /* The buffer was big enough. */
+                    free(szValue);
+                    *pszValue = szValueExp;
+                    return ERROR_SUCCESS;
+                }
+                else
+                {
+                    /* Retry with a bigger buffer. */
+                    free(szValueExp);
+#ifdef UNICODE
+                    dwSizeExp = dwCountExpResult * sizeof(TCHAR);
+#else
+                    /* Note: ANSI version requires one extra char. */
+                    dwSizeExp = (dwCountExpResult + 1) * sizeof(TCHAR);
+#endif
+                    dwCountExp = dwCountExpResult;
+                    szValueExp = (LPTSTR)malloc(dwSizeExp);
+                    if (szValueExp == NULL)
+                    {
+                        free(szValue);
+                        msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwSizeExp);
+                        return ERROR_OUTOFMEMORY;
+                    }
+
+                    dwCountExpResult = ExpandEnvironmentStrings(
+                        szValue,
+                        szValueExp, dwCountExp);
+                    free(szValue);
+                    *pszValue = szValueExp;
+                    return ERROR_SUCCESS;
+                }
+            }
+            else
+            {
+                *pszValue = szValue;
+                return ERROR_SUCCESS;
+            }
+        }
+
+        default:
+            msg(M_NONFATAL, "%s: \"%" PRIsLPTSTR "\" registry value is not string (type %u)", __FUNCTION__, dwValueType);
+            return ERROR_UNSUPPORTED_TYPE;
+    }
+}
+
+
+/**
+ * Returns network adapter ID.
+ *
+ * @param hDeviceInfoSet  A handle to a device information set that contains a device
+ *                      information element that represents the device.
+ *
+ * @param pDeviceInfoData  A pointer to an SP_DEVINFO_DATA structure that specifies the
+ *                      device information element in hDeviceInfoSet.
+ *
+ * @param iNumAttempts  After the device is created, it might take some time before the
+ *                      registry key is populated. This parameter specifies the number of
+ *                      attempts to read NetCfgInstanceId value from registry. A 1sec sleep
+ *                      is inserted between retry attempts.
+ *
+ * @param pguidAdapter  A pointer to GUID that receives network adapter ID.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+static DWORD
+get_net_adapter_guid(
+    _In_ HDEVINFO hDeviceInfoSet,
+    _In_ PSP_DEVINFO_DATA pDeviceInfoData,
+    _In_ int iNumAttempts,
+    _Out_ LPGUID pguidAdapter)
+{
+    DWORD dwResult = ERROR_BAD_ARGUMENTS;
+
+    if (pguidAdapter == NULL || iNumAttempts < 1)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    /* Open HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\<class>\<id> registry key. */
+    HKEY hKey = SetupDiOpenDevRegKey(
+        hDeviceInfoSet,
+        pDeviceInfoData,
+        DICS_FLAG_GLOBAL,
+        0,
+        DIREG_DRV,
+        KEY_READ);
+    if (hKey == INVALID_HANDLE_VALUE)
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL | M_ERRNO, "%s: SetupDiOpenDevRegKey failed", __FUNCTION__);
+        return dwResult;
+    }
+
+    while (iNumAttempts > 0)
+    {
+        /* Query the NetCfgInstanceId value. Using get_reg_string() right on might clutter the output with error messages while the registry is still being populated. */
+        LPTSTR szCfgGuidString = NULL;
+        dwResult = RegQueryValueEx(hKey, TEXT("NetCfgInstanceId"), NULL, NULL, NULL, NULL);
+        if (dwResult != ERROR_SUCCESS)
+        {
+            if (dwResult == ERROR_FILE_NOT_FOUND && --iNumAttempts > 0)
+            {
+                /* Wait and retry. */
+                Sleep(1000);
+                continue;
+            }
+
+            SetLastError(dwResult); /* MSDN does not mention RegQueryValueEx() to set GetLastError(). But we do have an error code. Set last error manually. */
+            msg(M_NONFATAL | M_ERRNO, "%s: querying \"NetCfgInstanceId\" registry value failed", __FUNCTION__);
+            break;
+        }
+
+        /* Read the NetCfgInstanceId value now. */
+        dwResult = get_reg_string(
+            hKey,
+            TEXT("NetCfgInstanceId"),
+            &szCfgGuidString);
+        if (dwResult != ERROR_SUCCESS)
+        {
+            break;
+        }
+
+        dwResult = SUCCEEDED(CLSIDFromString(szCfgGuidString, (LPCLSID)pguidAdapter)) ? ERROR_SUCCESS : ERROR_INVALID_DATA;
+        free(szCfgGuidString);
+        break;
+    }
+
+    RegCloseKey(hKey);
+    return dwResult;
+}
+
+
+/**
+ * Returns a specified Plug and Play device property.
+ *
+ * @param hDeviceInfoSet  A handle to a device information set that contains a device
+ *                      information element that represents the device.
+ *
+ * @param pDeviceInfoData  A pointer to an SP_DEVINFO_DATA structure that specifies the
+ *                      device information element in hDeviceInfoSet.
+ *
+ * @param dwProperty     Specifies the property to be retrieved. See
+ *                       https://msdn.microsoft.com/en-us/library/windows/hardware/ff551967.aspx
+ *
+ * @pdwPropertyRegDataType  A pointer to a variable that receives the data type of the
+ *                       property that is being retrieved. This is one of the standard
+ *                       registry data types. This parameter is optional and can be NULL.
+ *
+ * @param ppData         A pointer to pointer to data that receives the device property. The
+ *                       data must be released with free() after use.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+static DWORD
+get_device_reg_property(
+    _In_ HDEVINFO hDeviceInfoSet,
+    _In_ PSP_DEVINFO_DATA pDeviceInfoData,
+    _In_ DWORD dwProperty,
+    _Out_opt_ LPDWORD pdwPropertyRegDataType,
+    _Out_ LPVOID *ppData)
+{
+    DWORD dwResult = ERROR_BAD_ARGUMENTS;
+
+    if (ppData == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    /* Try with stack buffer first. */
+    BYTE bBufStack[128];
+    DWORD dwRequiredSize = 0;
+    if (SetupDiGetDeviceRegistryProperty(
+            hDeviceInfoSet,
+            pDeviceInfoData,
+            dwProperty,
+            pdwPropertyRegDataType,
+            bBufStack,
+            sizeof(bBufStack),
+            &dwRequiredSize))
+    {
+        /* Copy from stack. */
+        *ppData = malloc(dwRequiredSize);
+        if (*ppData == NULL)
+        {
+            msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwRequiredSize);
+            return ERROR_OUTOFMEMORY;
+        }
+
+        memcpy(*ppData, bBufStack, dwRequiredSize);
+        return ERROR_SUCCESS;
+    }
+    else
+    {
+        dwResult = GetLastError();
+        if (dwResult == ERROR_INSUFFICIENT_BUFFER)
+        {
+            /* Allocate on heap and retry. */
+            *ppData = malloc(dwRequiredSize);
+            if (*ppData == NULL)
+            {
+                msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwRequiredSize);
+                return ERROR_OUTOFMEMORY;
+            }
+
+            if (SetupDiGetDeviceRegistryProperty(
+                    hDeviceInfoSet,
+                    pDeviceInfoData,
+                    dwProperty,
+                    pdwPropertyRegDataType,
+                    *ppData,
+                    dwRequiredSize,
+                    &dwRequiredSize))
+            {
+                return ERROR_SUCCESS;
+            }
+            else
+            {
+                dwResult = GetLastError();
+                msg(M_NONFATAL | M_ERRNO, "%s: SetupDiGetDeviceRegistryProperty(%u) failed", __FUNCTION__, dwProperty);
+                return dwResult;
+            }
+        }
+        else
+        {
+            msg(M_NONFATAL | M_ERRNO, "%s: SetupDiGetDeviceRegistryProperty(%u) failed", __FUNCTION__, dwProperty);
+            return dwResult;
+        }
+    }
+}
+
+
+DWORD
+tap_create_adapter(
+    _In_opt_ HWND hwndParent,
+    _In_opt_ LPCTSTR szDeviceDescription,
+    _In_ LPCTSTR szHwId,
+    _Inout_ LPBOOL pbRebootRequired,
+    _Out_ LPGUID pguidAdapter)
+{
+    DWORD dwResult;
+    HMODULE libnewdev = NULL;
+
+    if (szHwId == NULL
+        || pbRebootRequired == NULL
+        || pguidAdapter == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    /* Create an empty device info set for network adapter device class. */
+    HDEVINFO hDevInfoList = SetupDiCreateDeviceInfoList(&GUID_DEVCLASS_NET, hwndParent);
+    if (hDevInfoList == INVALID_HANDLE_VALUE)
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL, "%s: SetupDiCreateDeviceInfoList failed", __FUNCTION__);
+        return dwResult;
+    }
+
+    /* Get the device class name from GUID. */
+    TCHAR szClassName[MAX_CLASS_NAME_LEN];
+    if (!SetupDiClassNameFromGuid(
+            &GUID_DEVCLASS_NET,
+            szClassName,
+            _countof(szClassName),
+            NULL))
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL, "%s: SetupDiClassNameFromGuid failed", __FUNCTION__);
+        goto cleanup_hDevInfoList;
+    }
+
+    /* Create a new device info element and add it to the device info set. */
+    SP_DEVINFO_DATA devinfo_data = { .cbSize = sizeof(SP_DEVINFO_DATA) };
+    if (!SetupDiCreateDeviceInfo(
+            hDevInfoList,
+            szClassName,
+            &GUID_DEVCLASS_NET,
+            szDeviceDescription,
+            hwndParent,
+            DICD_GENERATE_ID,
+            &devinfo_data))
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL, "%s: SetupDiCreateDeviceInfo failed", __FUNCTION__);
+        goto cleanup_hDevInfoList;
+    }
+
+    /* Set a device information element as the selected member of a device information set. */
+    if (!SetupDiSetSelectedDevice(
+            hDevInfoList,
+            &devinfo_data))
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL, "%s: SetupDiSetSelectedDevice failed", __FUNCTION__);
+        goto cleanup_hDevInfoList;
+    }
+
+    /* Set Plug&Play device hardware ID property. */
+    if (!SetupDiSetDeviceRegistryProperty(
+            hDevInfoList,
+            &devinfo_data,
+            SPDRP_HARDWAREID,
+            (const BYTE *)szHwId, (DWORD)((_tcslen(szHwId) + 1) * sizeof(TCHAR))))
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL, "%s: SetupDiSetDeviceRegistryProperty failed", __FUNCTION__);
+        goto cleanup_hDevInfoList;
+    }
+
+    /* Register the device instance with the PnP Manager */
+    if (!SetupDiCallClassInstaller(
+            DIF_REGISTERDEVICE,
+            hDevInfoList,
+            &devinfo_data))
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL, "%s: SetupDiCallClassInstaller(DIF_REGISTERDEVICE) failed", __FUNCTION__);
+        goto cleanup_hDevInfoList;
+    }
+
+    /* Install the device using DiInstallDevice()
+     * We instruct the system to use the best driver in the driver store
+     * by setting the drvinfo argument of DiInstallDevice as NULL. This
+     * assumes a driver is already installed in the driver store.
+     */
+#ifdef HAVE_DIINSTALLDEVICE
+    if (!DiInstallDevice(hwndParent, hDevInfoList, &devinfo_data, NULL, 0, pbRebootRequired))
+#else
+    /* mingw does not resolve DiInstallDevice, so load it at run time. */
+    typedef BOOL (WINAPI *DiInstallDeviceFn) (HWND, HDEVINFO, SP_DEVINFO_DATA *,
+                                                  SP_DRVINFO_DATA *, DWORD, BOOL *);
+    DiInstallDeviceFn installfn
+           = find_function (L"newdev.dll", "DiInstallDevice", &libnewdev);
+
+    if (!installfn)
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL | M_ERRNO, "%s: Failed to locate DiInstallDevice()", __FUNCTION__);
+        goto cleanup_hDevInfoList;
+    }
+
+    if (!installfn(hwndParent, hDevInfoList, &devinfo_data, NULL, 0, pbRebootRequired))
+#endif
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL | M_ERRNO, "%s: DiInstallDevice failed", __FUNCTION__);
+        goto cleanup_remove_device;
+    }
+
+    /* Get network adapter ID from registry. Retry for max 30sec. */
+    dwResult = get_net_adapter_guid(hDevInfoList, &devinfo_data, 30, pguidAdapter);
+
+cleanup_remove_device:
+    if (dwResult != ERROR_SUCCESS)
+    {
+        /* The adapter was installed. But, the adapter ID was unobtainable. Clean-up. */
+        SP_REMOVEDEVICE_PARAMS removedevice_params =
+        {
+            .ClassInstallHeader =
+            {
+                .cbSize = sizeof(SP_CLASSINSTALL_HEADER),
+                .InstallFunction = DIF_REMOVE,
+            },
+            .Scope = DI_REMOVEDEVICE_GLOBAL,
+            .HwProfile = 0,
+        };
+
+        /* Set class installer parameters for DIF_REMOVE. */
+        if (SetupDiSetClassInstallParams(
+                hDevInfoList,
+                &devinfo_data,
+                &removedevice_params.ClassInstallHeader,
+                sizeof(SP_REMOVEDEVICE_PARAMS)))
+        {
+            /* Call appropriate class installer. */
+            if (SetupDiCallClassInstaller(
+                    DIF_REMOVE,
+                    hDevInfoList,
+                    &devinfo_data))
+            {
+                /* Check if a system reboot is required. */
+                check_reboot(hDevInfoList, &devinfo_data, pbRebootRequired);
+            }
+            else
+            {
+                msg(M_NONFATAL | M_ERRNO, "%s: SetupDiCallClassInstaller(DIF_REMOVE) failed", __FUNCTION__);
+            }
+        }
+        else
+        {
+            msg(M_NONFATAL | M_ERRNO, "%s: SetupDiSetClassInstallParams failed", __FUNCTION__);
+        }
+    }
+
+cleanup_hDevInfoList:
+    if (libnewdev)
+    {
+        FreeLibrary(libnewdev);
+    }
+    SetupDiDestroyDeviceInfoList(hDevInfoList);
+    return dwResult;
+}
+
+
+/**
+ * Performs a given task on an adapter.
+ *
+ * @param hwndParent    A handle to the top-level window to use for any user adapter that is
+ *                      related to non-device-specific actions (such as a select-device dialog
+ *                      box that uses the global class driver list). This handle is optional
+ *                      and can be NULL. If a specific top-level window is not required, set
+ *                      hwndParent to NULL.
+ *
+ * @param pguidAdapter  A pointer to GUID that contains network adapter ID.
+ *
+ * @param funcOperation  A pointer for the function to perform specific task on the adapter.
+ *
+ * @param pbRebootRequired  A pointer to a BOOL flag. If the device requires a system restart,
+ *                      this flag is set to TRUE. Otherwise, the flag is left unmodified. This
+ *                      allows the flag to be globally initialized to FALSE and reused for multiple
+ *                      adapter manipulations.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+static DWORD
+execute_on_first_adapter(
+    _In_opt_ HWND hwndParent,
+    _In_ LPCGUID pguidAdapter,
+    _In_ devop_func_t funcOperation,
+    _Inout_ LPBOOL pbRebootRequired)
+{
+    DWORD dwResult;
+
+    if (pguidAdapter == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    /* Create a list of network devices. */
+    HDEVINFO hDevInfoList = SetupDiGetClassDevsEx(
+        &GUID_DEVCLASS_NET,
+        NULL,
+        hwndParent,
+        DIGCF_PRESENT,
+        NULL,
+        NULL,
+        NULL);
+    if (hDevInfoList == INVALID_HANDLE_VALUE)
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL, "%s: SetupDiGetClassDevsEx failed", __FUNCTION__);
+        return dwResult;
+    }
+
+    /* Retrieve information associated with a device information set. */
+    SP_DEVINFO_LIST_DETAIL_DATA devinfo_list_detail_data = { .cbSize = sizeof(SP_DEVINFO_LIST_DETAIL_DATA) };
+    if (!SetupDiGetDeviceInfoListDetail(hDevInfoList, &devinfo_list_detail_data))
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL, "%s: SetupDiGetDeviceInfoListDetail failed", __FUNCTION__);
+        goto cleanup_hDevInfoList;
+    }
+
+    /* Iterate. */
+    for (DWORD dwIndex = 0;; dwIndex++)
+    {
+        /* Get the device from the list. */
+        SP_DEVINFO_DATA devinfo_data = { .cbSize = sizeof(SP_DEVINFO_DATA) };
+        if (!SetupDiEnumDeviceInfo(
+                hDevInfoList,
+                dwIndex,
+                &devinfo_data))
+        {
+            if (GetLastError() == ERROR_NO_MORE_ITEMS)
+            {
+                LPOLESTR szAdapterId = NULL;
+                StringFromIID((REFIID)pguidAdapter, &szAdapterId);
+                msg(M_NONFATAL, "%s: Adapter %" PRIsLPOLESTR " not found", __FUNCTION__, szAdapterId);
+                CoTaskMemFree(szAdapterId);
+                dwResult = ERROR_FILE_NOT_FOUND;
+                goto cleanup_hDevInfoList;
+            }
+            else
+            {
+                /* Something is wrong with this device. Skip it. */
+                msg(M_WARN | M_ERRNO, "%s: SetupDiEnumDeviceInfo(%u) failed", __FUNCTION__, dwIndex);
+                continue;
+            }
+        }
+
+        /* Get adapter GUID. */
+        GUID guidAdapter;
+        dwResult = get_net_adapter_guid(hDevInfoList, &devinfo_data, 1, &guidAdapter);
+        if (dwResult != ERROR_SUCCESS)
+        {
+            /* Something is wrong with this device. Skip it. */
+            continue;
+        }
+
+        /* Compare GUIDs. */
+        if (memcmp(pguidAdapter, &guidAdapter, sizeof(GUID)) == 0)
+        {
+            dwResult = funcOperation(hDevInfoList, &devinfo_data, pbRebootRequired);
+            break;
+        }
+    }
+
+cleanup_hDevInfoList:
+    SetupDiDestroyDeviceInfoList(hDevInfoList);
+    return dwResult;
+}
+
+
+DWORD
+tap_delete_adapter(
+    _In_opt_ HWND hwndParent,
+    _In_ LPCGUID pguidAdapter,
+    _Inout_ LPBOOL pbRebootRequired)
+{
+    return execute_on_first_adapter(hwndParent, pguidAdapter, delete_device, pbRebootRequired);
+}
+
+
+DWORD
+tap_enable_adapter(
+    _In_opt_ HWND hwndParent,
+    _In_ LPCGUID pguidAdapter,
+    _In_ BOOL bEnable,
+    _Inout_ LPBOOL pbRebootRequired)
+{
+    return execute_on_first_adapter(hwndParent, pguidAdapter, bEnable ? enable_device : disable_device, pbRebootRequired);
+}
+
+/* stripped version of ExecCommand in interactive.c */
+static DWORD
+ExecCommand(const WCHAR* cmdline)
+{
+    DWORD exit_code;
+    STARTUPINFOW si;
+    PROCESS_INFORMATION pi;
+    DWORD proc_flags = CREATE_NO_WINDOW | CREATE_UNICODE_ENVIRONMENT;
+    WCHAR* cmdline_dup = NULL;
+
+    ZeroMemory(&si, sizeof(si));
+    ZeroMemory(&pi, sizeof(pi));
+
+    si.cb = sizeof(si);
+
+    /* CreateProcess needs a modifiable cmdline: make a copy */
+    cmdline_dup = _wcsdup(cmdline);
+    if (cmdline_dup && CreateProcessW(NULL, cmdline_dup, NULL, NULL, FALSE,
+        proc_flags, NULL, NULL, &si, &pi))
+    {
+        WaitForSingleObject(pi.hProcess, INFINITE);
+        if (!GetExitCodeProcess(pi.hProcess, &exit_code))
+        {
+            exit_code = GetLastError();
+        }
+
+        CloseHandle(pi.hProcess);
+        CloseHandle(pi.hThread);
+    }
+    else
+    {
+        exit_code = GetLastError();
+    }
+
+    free(cmdline_dup);
+    return exit_code;
+}
+
+DWORD
+tap_set_adapter_name(
+    _In_ LPCGUID pguidAdapter,
+    _In_ LPCTSTR szName,
+    _In_ BOOL bSilent)
+{
+    DWORD dwResult;
+    int msg_flag = bSilent ? M_WARN : M_NONFATAL;
+    msg_flag |= M_ERRNO;
+
+    if (pguidAdapter == NULL || szName == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    /* Get the device class GUID as string. */
+    LPOLESTR szDevClassNetId = NULL;
+    StringFromIID((REFIID)&GUID_DEVCLASS_NET, &szDevClassNetId);
+
+    /* Get the adapter GUID as string. */
+    LPOLESTR szAdapterId = NULL;
+    StringFromIID((REFIID)pguidAdapter, &szAdapterId);
+
+    /* Render registry key path. */
+    TCHAR szRegKey[ADAPTER_REGKEY_PATH_MAX];
+    _stprintf_s(
+        szRegKey, _countof(szRegKey),
+        szAdapterRegKeyPathTemplate,
+        szDevClassNetId,
+        szAdapterId);
+
+    /* Open network adapter registry key. */
+    HKEY hKey = NULL;
+    dwResult = RegOpenKeyEx(
+        HKEY_LOCAL_MACHINE,
+        szRegKey,
+        0,
+        KEY_QUERY_VALUE,
+        &hKey);
+    if (dwResult != ERROR_SUCCESS)
+    {
+        SetLastError(dwResult); /* MSDN does not mention RegOpenKeyEx() to set GetLastError(). But we do have an error code. Set last error manually. */
+        msg(msg_flag, "%s: RegOpenKeyEx(HKLM, \"%" PRIsLPTSTR "\") failed", __FUNCTION__, szRegKey);
+        goto cleanup_szAdapterId;
+    }
+
+    LPTSTR szOldName = NULL;
+    dwResult = get_reg_string(hKey, TEXT("Name"), &szOldName);
+    if (dwResult != ERROR_SUCCESS)
+    {
+        SetLastError(dwResult);
+        msg(msg_flag, "%s: Error reading adapter name", __FUNCTION__);
+        goto cleanup_hKey;
+    }
+
+    /* rename adapter via netsh call */
+    const TCHAR* szFmt = _T("netsh interface set interface name=\"%s\" newname=\"%s\"");
+    size_t ncmdline = _tcslen(szFmt) + _tcslen(szOldName) + _tcslen(szName) + 1;
+    WCHAR* szCmdLine = malloc(ncmdline * sizeof(TCHAR));
+    _stprintf_s(szCmdLine, ncmdline, szFmt, szOldName, szName);
+
+    free(szOldName);
+
+    dwResult = ExecCommand(szCmdLine);
+    free(szCmdLine);
+
+    if (dwResult != ERROR_SUCCESS)
+    {
+        SetLastError(dwResult);
+        msg(msg_flag, "%s: Error renaming adapter", __FUNCTION__);
+        goto cleanup_hKey;
+    }
+
+cleanup_hKey:
+    RegCloseKey(hKey);
+cleanup_szAdapterId:
+    CoTaskMemFree(szAdapterId);
+    CoTaskMemFree(szDevClassNetId);
+    return dwResult;
+}
+
+
+DWORD
+tap_list_adapters(
+    _In_opt_ HWND hwndParent,
+    _In_opt_ LPCTSTR szzHwIDs,
+    _Out_ struct tap_adapter_node **ppAdapter)
+{
+    DWORD dwResult;
+
+    if (ppAdapter == NULL)
+    {
+        return ERROR_BAD_ARGUMENTS;
+    }
+
+    /* Create a list of network devices. */
+    HDEVINFO hDevInfoList = SetupDiGetClassDevsEx(
+        &GUID_DEVCLASS_NET,
+        NULL,
+        hwndParent,
+        DIGCF_PRESENT,
+        NULL,
+        NULL,
+        NULL);
+    if (hDevInfoList == INVALID_HANDLE_VALUE)
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL, "%s: SetupDiGetClassDevsEx failed", __FUNCTION__);
+        return dwResult;
+    }
+
+    /* Retrieve information associated with a device information set. */
+    SP_DEVINFO_LIST_DETAIL_DATA devinfo_list_detail_data = { .cbSize = sizeof(SP_DEVINFO_LIST_DETAIL_DATA) };
+    if (!SetupDiGetDeviceInfoListDetail(hDevInfoList, &devinfo_list_detail_data))
+    {
+        dwResult = GetLastError();
+        msg(M_NONFATAL, "%s: SetupDiGetDeviceInfoListDetail failed", __FUNCTION__);
+        goto cleanup_hDevInfoList;
+    }
+
+    /* Get the device class GUID as string. */
+    LPOLESTR szDevClassNetId = NULL;
+    StringFromIID((REFIID)&GUID_DEVCLASS_NET, &szDevClassNetId);
+
+    /* Iterate. */
+    *ppAdapter = NULL;
+    struct tap_adapter_node *pAdapterTail = NULL;
+    for (DWORD dwIndex = 0;; dwIndex++)
+    {
+        /* Get the device from the list. */
+        SP_DEVINFO_DATA devinfo_data = { .cbSize = sizeof(SP_DEVINFO_DATA) };
+        if (!SetupDiEnumDeviceInfo(
+                hDevInfoList,
+                dwIndex,
+                &devinfo_data))
+        {
+            if (GetLastError() == ERROR_NO_MORE_ITEMS)
+            {
+                break;
+            }
+            else
+            {
+                /* Something is wrong with this device. Skip it. */
+                msg(M_WARN | M_ERRNO, "%s: SetupDiEnumDeviceInfo(%u) failed", __FUNCTION__, dwIndex);
+                continue;
+            }
+        }
+
+        /* Get device hardware ID(s). */
+        DWORD dwDataType = REG_NONE;
+        LPTSTR szzDeviceHardwareIDs = NULL;
+        dwResult = get_device_reg_property(
+            hDevInfoList,
+            &devinfo_data,
+            SPDRP_HARDWAREID,
+            &dwDataType,
+            (LPVOID)&szzDeviceHardwareIDs);
+        if (dwResult != ERROR_SUCCESS)
+        {
+            /* Something is wrong with this device. Skip it. */
+            continue;
+        }
+
+        /* Check that hardware ID is REG_SZ/REG_MULTI_SZ, and optionally if it matches ours. */
+        if (dwDataType == REG_SZ)
+        {
+            if (szzHwIDs && !_tcszistr(szzHwIDs, szzDeviceHardwareIDs))
+            {
+                /* This is not our device. Skip it. */
+                goto cleanup_szzDeviceHardwareIDs;
+            }
+        }
+        else if (dwDataType == REG_MULTI_SZ)
+        {
+            if (szzHwIDs)
+            {
+                for (LPTSTR s = szzDeviceHardwareIDs;; s += _tcslen(s) + 1)
+                {
+                    if (s[0] == 0)
+                    {
+                        /* This is not our device. Skip it. */
+                        goto cleanup_szzDeviceHardwareIDs;
+                    }
+                    else if (_tcszistr(szzHwIDs, s))
+                    {
+                        /* This is our device. */
+                        break;
+                    }
+                }
+            }
+        }
+        else
+        {
+            /* Unexpected hardware ID format. Skip device. */
+            goto cleanup_szzDeviceHardwareIDs;
+        }
+
+        /* Get adapter GUID. */
+        GUID guidAdapter;
+        dwResult = get_net_adapter_guid(hDevInfoList, &devinfo_data, 1, &guidAdapter);
+        if (dwResult != ERROR_SUCCESS)
+        {
+            /* Something is wrong with this device. Skip it. */
+            goto cleanup_szzDeviceHardwareIDs;
+        }
+
+        /* Get the adapter GUID as string. */
+        LPOLESTR szAdapterId = NULL;
+        StringFromIID((REFIID)&guidAdapter, &szAdapterId);
+
+        /* Render registry key path. */
+        TCHAR szRegKey[ADAPTER_REGKEY_PATH_MAX];
+        _stprintf_s(
+            szRegKey, _countof(szRegKey),
+            szAdapterRegKeyPathTemplate,
+            szDevClassNetId,
+            szAdapterId);
+
+        /* Open network adapter registry key. */
+        HKEY hKey = NULL;
+        dwResult = RegOpenKeyEx(
+            HKEY_LOCAL_MACHINE,
+            szRegKey,
+            0,
+            KEY_READ,
+            &hKey);
+        if (dwResult != ERROR_SUCCESS)
+        {
+            SetLastError(dwResult); /* MSDN does not mention RegOpenKeyEx() to set GetLastError(). But we do have an error code. Set last error manually. */
+            msg(M_WARN | M_ERRNO, "%s: RegOpenKeyEx(HKLM, \"%" PRIsLPTSTR "\") failed", __FUNCTION__, szRegKey);
+            goto cleanup_szAdapterId;
+        }
+
+        /* Read adapter name. */
+        LPTSTR szName = NULL;
+        dwResult = get_reg_string(
+            hKey,
+            TEXT("Name"),
+            &szName);
+        if (dwResult != ERROR_SUCCESS)
+        {
+            SetLastError(dwResult);
+            msg(M_WARN | M_ERRNO, "%s: Cannot determine %" PRIsLPOLESTR " adapter name", __FUNCTION__, szAdapterId);
+            goto cleanup_hKey;
+        }
+
+        /* Append to the list. */
+        size_t hwid_size = (_tcszlen(szzDeviceHardwareIDs) + 1) * sizeof(TCHAR);
+        size_t name_size = (_tcslen(szName) + 1) * sizeof(TCHAR);
+        struct tap_adapter_node *node = (struct tap_adapter_node *)malloc(sizeof(struct tap_adapter_node) + hwid_size + name_size);
+        if (node == NULL)
+        {
+            msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, sizeof(struct tap_adapter_node) + hwid_size + name_size);
+            dwResult = ERROR_OUTOFMEMORY; goto cleanup_szName;
+        }
+
+        memcpy(&node->guid, &guidAdapter, sizeof(GUID));
+        node->szzHardwareIDs = (LPTSTR)(node + 1);
+        memcpy(node->szzHardwareIDs, szzDeviceHardwareIDs, hwid_size);
+        node->szName = (LPTSTR)((LPBYTE)node->szzHardwareIDs + hwid_size);
+        memcpy(node->szName, szName, name_size);
+        node->pNext = NULL;
+        if (pAdapterTail)
+        {
+            pAdapterTail->pNext = node;
+            pAdapterTail = node;
+        }
+        else
+        {
+            *ppAdapter = pAdapterTail = node;
+        }
+
+cleanup_szName:
+        free(szName);
+cleanup_hKey:
+        RegCloseKey(hKey);
+cleanup_szAdapterId:
+        CoTaskMemFree(szAdapterId);
+cleanup_szzDeviceHardwareIDs:
+        free(szzDeviceHardwareIDs);
+    }
+
+    dwResult = ERROR_SUCCESS;
+
+    CoTaskMemFree(szDevClassNetId);
+cleanup_hDevInfoList:
+    SetupDiDestroyDeviceInfoList(hDevInfoList);
+    return dwResult;
+}
+
+
+void
+tap_free_adapter_list(
+    _In_ struct tap_adapter_node *pAdapterList)
+{
+    /* Iterate over all nodes of the list. */
+    while (pAdapterList)
+    {
+        struct tap_adapter_node *node = pAdapterList;
+        pAdapterList = pAdapterList->pNext;
+
+        /* Free the adapter node. */
+        free(node);
+    }
+}
diff --git a/src/tapctl/tap.h b/src/tapctl/tap.h
new file mode 100644
index 0000000..847040c
--- /dev/null
+++ b/src/tapctl/tap.h
@@ -0,0 +1,181 @@
+/*
+ *  tapctl -- Utility to manipulate TUN/TAP adapters on Windows
+ *            https://community.openvpn.net/openvpn/wiki/Tapctl
+ *
+ *  Copyright (C) 2018-2021 Simon Rozman <simon@rozman.si>
+ *
+ *  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; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef TAP_H
+#define TAP_H
+
+#include <windows.h>
+#include "basic.h"
+
+
+/**
+ * Creates a TUN/TAP adapter.
+ *
+ * @param hwndParent    A handle to the top-level window to use for any user adapter that is
+ *                      related to non-device-specific actions (such as a select-device dialog
+ *                      box that uses the global class driver list). This handle is optional
+ *                      and can be NULL. If a specific top-level window is not required, set
+ *                      hwndParent to NULL.
+ *
+ * @param szDeviceDescription  A pointer to a NULL-terminated string that supplies the text
+ *                      description of the device. This pointer is optional and can be NULL.
+ *
+ * @param szHwId        A pointer to a NULL-terminated string that supplies the hardware id
+ *                      of the device (e.g. "root\\tap0901", "Wintun").
+ *
+ * @param pbRebootRequired  A pointer to a BOOL flag. If the device requires a system restart,
+ *                      this flag is set to TRUE. Otherwise, the flag is left unmodified. This
+ *                      allows the flag to be globally initialized to FALSE and reused for multiple
+ *                      adapter manipulations.
+ *
+ * @param pguidAdapter  A pointer to GUID that receives network adapter ID.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+DWORD
+tap_create_adapter(
+    _In_opt_ HWND hwndParent,
+    _In_opt_ LPCTSTR szDeviceDescription,
+    _In_ LPCTSTR szHwId,
+    _Inout_ LPBOOL pbRebootRequired,
+    _Out_ LPGUID pguidAdapter);
+
+
+/**
+ * Deletes an adapter.
+ *
+ * @param hwndParent    A handle to the top-level window to use for any user adapter that is
+ *                      related to non-device-specific actions (such as a select-device dialog
+ *                      box that uses the global class driver list). This handle is optional
+ *                      and can be NULL. If a specific top-level window is not required, set
+ *                      hwndParent to NULL.
+ *
+ * @param pguidAdapter  A pointer to GUID that contains network adapter ID.
+ *
+ * @param pbRebootRequired  A pointer to a BOOL flag. If the device requires a system restart,
+ *                      this flag is set to TRUE. Otherwise, the flag is left unmodified. This
+ *                      allows the flag to be globally initialized to FALSE and reused for multiple
+ *                      adapter manipulations.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+DWORD
+tap_delete_adapter(
+    _In_opt_ HWND hwndParent,
+    _In_ LPCGUID pguidAdapter,
+    _Inout_ LPBOOL pbRebootRequired);
+
+
+/**
+ * Enables or disables an adapter.
+ *
+ * @param hwndParent    A handle to the top-level window to use for any user adapter that is
+ *                      related to non-device-specific actions (such as a select-device dialog
+ *                      box that uses the global class driver list). This handle is optional
+ *                      and can be NULL. If a specific top-level window is not required, set
+ *                      hwndParent to NULL.
+ *
+ * @param pguidAdapter  A pointer to GUID that contains network adapter ID.
+ *
+ * @param bEnable       TRUE to enable; FALSE to disable
+ *
+ * @param pbRebootRequired  A pointer to a BOOL flag. If the device requires a system restart,
+ *                      this flag is set to TRUE. Otherwise, the flag is left unmodified. This
+ *                      allows the flag to be globally initialized to FALSE and reused for multiple
+ *                      adapter manipulations.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+DWORD
+tap_enable_adapter(
+    _In_opt_ HWND hwndParent,
+    _In_ LPCGUID pguidAdapter,
+    _In_ BOOL bEnable,
+    _Inout_ LPBOOL pbRebootRequired);
+
+
+/**
+ * Sets adapter name.
+ *
+ * @param pguidAdapter  A pointer to GUID that contains network adapter ID.
+ *
+ * @param szName        New adapter name - must be unique
+ *
+ * @param bSilent       If true, MSI installer won't display message box and
+ *                      only print error to log.
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ **/
+DWORD
+tap_set_adapter_name(
+    _In_ LPCGUID pguidAdapter,
+    _In_ LPCTSTR szName,
+    _In_ BOOL bSilent);
+
+
+/**
+ * Network adapter list node
+ */
+struct tap_adapter_node
+{
+    GUID guid;             /** Adapter GUID */
+    LPTSTR szzHardwareIDs; /** Device hardware ID(s) */
+    LPTSTR szName;         /** Adapter name */
+
+    struct tap_adapter_node *pNext; /** Pointer to next adapter */
+};
+
+
+/**
+ * Creates a list of existing network adapters.
+ *
+ * @param hwndParent    A handle to the top-level window to use for any user adapter that is
+ *                      related to non-device-specific actions (such as a select-device dialog
+ *                      box that uses the global class driver list). This handle is optional
+ *                      and can be NULL. If a specific top-level window is not required, set
+ *                      hwndParent to NULL.
+ *
+ * @param szzHwIDs      A string of strings that supplies the list of hardware IDs of the device.
+ *                      This pointer is optional and can be NULL. When NULL, all network adapters
+ *                      found are added to the list.
+ *
+ * @param ppAdapterList  A pointer to the list to receive pointer to the first adapter in
+ *                      the list. After the list is no longer required, free it using
+ *                      tap_free_adapter_list().
+ *
+ * @return ERROR_SUCCESS on success; Win32 error code otherwise
+ */
+DWORD
+tap_list_adapters(
+    _In_opt_ HWND hwndParent,
+    _In_opt_ LPCTSTR szzHwIDs,
+    _Out_ struct tap_adapter_node **ppAdapterList);
+
+
+/**
+ * Frees a list of network adapters.
+ *
+ * @param pAdapterList  A pointer to the first adapter in the list to free.
+ */
+void
+tap_free_adapter_list(
+    _In_ struct tap_adapter_node *pAdapterList);
+
+#endif /* ifndef TAP_H */
diff --git a/src/tapctl/tapctl.exe.manifest b/src/tapctl/tapctl.exe.manifest
new file mode 100644
index 0000000..1eb5ea8
--- /dev/null
+++ b/src/tapctl/tapctl.exe.manifest
@@ -0,0 +1,10 @@
+<?xml version='1.0' encoding='UTF-8' standalone='yes'?>
+<assembly xmlns='urn:schemas-microsoft-com:asm.v1' manifestVersion='1.0'>
+  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+    <security>
+      <requestedPrivileges>
+        <requestedExecutionLevel level='requireAdministrator' uiAccess='false' />
+      </requestedPrivileges>
+    </security>
+  </trustInfo>
+</assembly>
diff --git a/src/tapctl/tapctl.props b/src/tapctl/tapctl.props
new file mode 100644
index 0000000..0257b9f
--- /dev/null
+++ b/src/tapctl/tapctl.props
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ImportGroup Label="PropertySheets" />
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup>
+    <GenerateManifest>false</GenerateManifest>
+  </PropertyGroup>
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <PreprocessorDefinitions>_CONSOLE;_WIN32_WINNT=_WIN32_WINNT_VISTA;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\compat;$(TAP_WINDOWS_HOME)/include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup />
+</Project>
\ No newline at end of file
diff --git a/src/tapctl/tapctl.vcxproj b/src/tapctl/tapctl.vcxproj
new file mode 100644
index 0000000..ad96f02
--- /dev/null
+++ b/src/tapctl/tapctl.vcxproj
@@ -0,0 +1,163 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>15.0</VCProjectVersion>
+    <ProjectGuid>{A06436E7-D576-490D-8BA0-0751D920334A}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>tapctl</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+    <WindowsSDKDesktopARM64Support>true</WindowsSDKDesktopARM64Support>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+    <WindowsSDKDesktopARM64Support>true</WindowsSDKDesktopARM64Support>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\compat\Debug.props" />
+    <Import Project="tapctl.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\compat\Debug.props" />
+    <Import Project="tapctl.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\compat\Debug.props" />
+    <Import Project="tapctl.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\compat\Release.props" />
+    <Import Project="tapctl.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\compat\Release.props" />
+    <Import Project="tapctl.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\compat\Release.props" />
+    <Import Project="tapctl.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Label="Vcpkg" Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <VcpkgEnabled>true</VcpkgEnabled>
+  </PropertyGroup>
+  <PropertyGroup Label="Vcpkg" Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <VcpkgEnabled>true</VcpkgEnabled>
+  </PropertyGroup>
+  <PropertyGroup Label="Vcpkg" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <VcpkgEnabled>true</VcpkgEnabled>
+  </PropertyGroup>
+  <PropertyGroup Label="Vcpkg" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <VcpkgEnabled>true</VcpkgEnabled>
+  </PropertyGroup>
+  <PropertyGroup Label="Vcpkg" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <VcpkgEnabled>true</VcpkgEnabled>
+  </PropertyGroup>
+  <PropertyGroup Label="Vcpkg" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <VcpkgEnabled>true</VcpkgEnabled>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" />
+  <ItemGroup>
+    <ClCompile Include="error.c" />
+    <ClCompile Include="tap.c" />
+    <ClCompile Include="main.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="basic.h" />
+    <ClInclude Include="error.h" />
+    <ClInclude Include="tap.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="tapctl_resources.rc" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\build\msvc\msvc-generate\msvc-generate.vcxproj">
+      <Project>{8598c2c8-34c4-47a1-99b0-7c295a890615}</Project>
+      <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <Manifest Include="tapctl.exe.manifest" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/src/tapctl/tapctl.vcxproj.filters b/src/tapctl/tapctl.vcxproj.filters
new file mode 100644
index 0000000..c7f71e9
--- /dev/null
+++ b/src/tapctl/tapctl.vcxproj.filters
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="tap.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="main.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="error.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="tap.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="error.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="basic.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="tapctl_resources.rc">
+      <Filter>Resource Files</Filter>
+    </ResourceCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <Manifest Include="tapctl.exe.manifest">
+      <Filter>Resource Files</Filter>
+    </Manifest>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/src/tapctl/tapctl_resources.rc b/src/tapctl/tapctl_resources.rc
new file mode 100644
index 0000000..a195396
--- /dev/null
+++ b/src/tapctl/tapctl_resources.rc
@@ -0,0 +1,64 @@
+/*
+ *  tapctl -- Utility to manipulate TUN/TAP adapters on Windows
+ *
+ *  Copyright (C) 2018-2021 Simon Rozman <simon@rozman.si>
+ *
+ *  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; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#else
+#include <config-msvc-version.h>
+#endif
+#include <winresrc.h>
+
+#pragma code_page(65001) /* UTF8 */
+
+LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
+
+VS_VERSION_INFO VERSIONINFO
+    FILEVERSION OPENVPN_VERSION_RESOURCE
+    PRODUCTVERSION OPENVPN_VERSION_RESOURCE
+    FILEFLAGSMASK VS_FF_DEBUG | VS_FF_PRERELEASE | VS_FF_PATCHED | VS_FF_PRIVATEBUILD | VS_FF_SPECIALBUILD
+#ifdef _DEBUG
+    FILEFLAGS VS_FF_DEBUG
+#else
+    FILEFLAGS 0x0L
+#endif
+    FILEOS VOS_NT_WINDOWS32
+    FILETYPE VFT_APP
+    FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904b0"
+        BEGIN
+            VALUE "CompanyName", "The OpenVPN Project"
+            VALUE "FileDescription", "Utility to manipulate TUN/TAP adapters on Windows"
+            VALUE "FileVersion", PACKAGE_VERSION ".0"
+            VALUE "InternalName", "OpenVPN"
+            VALUE "LegalCopyright", "Copyright © The OpenVPN Project"
+            VALUE "OriginalFilename", "tapctl.exe"
+            VALUE "ProductName", "OpenVPN"
+            VALUE "ProductVersion", PACKAGE_VERSION ".0"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1200
+    END
+END
+
+1 RT_MANIFEST "tapctl.exe.manifest"