diff --git a/CMakeLists.txt b/CMakeLists.txt
index d787958..682501b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,26 +14,69 @@
 set (includedir "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
 set (VERSION ${CMAKE_PROJECT_VERSION})
 
-find_package (PkgConfig REQUIRED)
-
-find_package(msgpack-cxx CONFIG)
-if(msgpack-cxx_FOUND)
-  set(MSGPACK_LIB msgpack-cxx)
-else()
-  find_package(msgpackc-cxx CONFIG REQUIRED NAMES msgpackc-cxx msgpack)
-  set(MSGPACK_LIB msgpackc-cxx)
-endif()
-
-find_package(fmt)
-pkg_check_modules (opendht REQUIRED IMPORTED_TARGET opendht>=2.6.0)
-pkg_check_modules (pjproject REQUIRED IMPORTED_TARGET libpjproject)
-
-set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DMSGPACK_NO_BOOST -DMSGPACK_DISABLE_LEGACY_NIL -DMSGPACK_DISABLE_LEGACY_CONVERT")
-
-option(BUILD_TOOLS "Build dnc" ON)
 option(DHTNET_PUPNP "Enable UPnP support" ON)
 option(DHTNET_NATPMP "Enable NAT-PMP support" ON)
 option(DHTNET_TESTABLE "Enable API for tests" ON)
+option(BUILD_TOOLS "Build tools" ON)
+
+if (NOT MSVC)
+    find_package (PkgConfig REQUIRED)
+
+    find_package(msgpack-cxx CONFIG)
+    if(msgpack-cxx_FOUND)
+    set(MSGPACK_LIB msgpack-cxx)
+    else()
+    find_package(msgpackc-cxx CONFIG REQUIRED NAMES msgpackc-cxx msgpack)
+    set(MSGPACK_LIB msgpackc-cxx)
+    endif()
+
+    find_package(fmt)
+    pkg_check_modules (opendht REQUIRED IMPORTED_TARGET opendht>=2.6.0)
+    pkg_check_modules (pjproject REQUIRED IMPORTED_TARGET libpjproject)
+else()
+    set (WIN32_DEP_DIR ${PROJECT_SOURCE_DIR}/../)
+    include_directories(
+        ${WIN32_DEP_DIR}/../msvc/include
+        ${WIN32_DEP_DIR}/msgpack-c/include
+        ${WIN32_DEP_DIR}/asio/asio/include
+        ${WIN32_DEP_DIR}/fmt/include
+        ${WIN32_DEP_DIR}/pjproject/pjlib/include
+        ${WIN32_DEP_DIR}/pjproject/pjlib-util/include
+        ${WIN32_DEP_DIR}/pjproject/pjnath/include
+        ${WIN32_DEP_DIR}/opendht/include
+        ${WIN32_DEP_DIR}/opendht/src/compat/msvc
+        ${WIN32_DEP_DIR}/openssl/include
+        ${WIN32_DEP_DIR}/restinio/dev
+        ${WIN32_DEP_DIR}/http_parser
+        ${WIN32_DEP_DIR}/pupnp/include
+        ${WIN32_DEP_DIR}/natpmp/include
+    )
+    # windirent.h
+    include_directories(include/compat/msvc)
+endif()
+
+if (NOT MSVC)
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} \
+        -DMSGPACK_NO_BOOST \
+        -DMSGPACK_DISABLE_LEGACY_NIL \
+        -DMSGPACK_DISABLE_LEGACY_CONVERT")
+else()
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} \
+        -DGNUTLS_INTERNAL_BUILD \
+        -D_USE_MATH_DEFINES \
+        -D_SCL_SECURE_NO_WARNINGS \
+        -D_CRT_SECURE_NO_WARNINGS \
+        -D_WINSOCK_DEPRECATED_NO_WARNINGS \
+        -DASIO_STANDALONE \
+        -DWIN32_LEAN_AND_MEAN \
+        -D_WIN32_WINNT=0x0601 \
+        -DNATPMP_STATICLIB \
+        -DMSGPACK_NO_BOOST \
+        -DMSGPACK_DISABLE_LEGACY_NIL \
+        -DMSGPACK_DISABLE_LEGACY_CONVERT \
+        -DUNICODE \
+        -D_UNICODE")
+endif()
 
 # Sources
 list (APPEND dhtnet_SOURCES
@@ -73,20 +116,15 @@
     include/upnp/upnp_control.h
 )
 
-if (DHTNET_PUPNP)
+# Port mapping dependencies - add sources and libraries
+if (DHTNET_PUPNP AND NOT MSVC)
     pkg_search_module (upnp IMPORTED_TARGET upnp libupnp)
     if (NOT upnp_FOUND)
         message("libupnp not found: disabling")
         set(DHTNET_PUPNP Off)
-    else()
-        list (APPEND dhtnet_SOURCES
-            src/upnp/protocol/pupnp/pupnp.cpp
-            src/upnp/protocol/pupnp/upnp_igd.cpp
-        )
-        set (requiresprivate "${requiresprivate} libupnp")
     endif()
 endif()
-if (DHTNET_NATPMP)
+if (DHTNET_NATPMP AND NOT MSVC)
     pkg_search_module (natpmp IMPORTED_TARGET natpmp)
     if (NOT natpmp_FOUND)
         find_library(natpmp_LIBRARIES natpmp)
@@ -97,17 +135,35 @@
             message("NAT-PMP found: ${natpmp_LIBRARIES}")
         endif()
     endif()
-    if (DHTNET_NATPMP)
-        list (APPEND dhtnet_SOURCES
-            src/upnp/protocol/natpmp/nat_pmp.cpp
-            src/upnp/protocol/natpmp/pmp_igd.cpp
-        )
-        set (libsprivate "${libsprivate} ${natpmp_LIBRARIES}")
-    endif()
+endif()
+
+if (DHTNET_PUPNP)
+    list (APPEND dhtnet_PRIVATE_DEFS HAVE_LIBUPNP)
+    list (APPEND dhtnet_SOURCES
+        src/upnp/protocol/pupnp/pupnp.cpp
+        src/upnp/protocol/pupnp/upnp_igd.cpp
+    )
+    list (APPEND dhtnet_PRIVATELIBS ${upnp_LIBRARIES})
+endif()
+if (DHTNET_NATPMP)
+    list (APPEND dhtnet_PRIVATE_DEFS HAVE_LIBNATPMP)
+    list (APPEND dhtnet_SOURCES
+        src/upnp/protocol/natpmp/nat_pmp.cpp
+        src/upnp/protocol/natpmp/pmp_igd.cpp
+    )
+    list (APPEND dhtnet_PRIVATELIBS ${natpmp_LIBRARIES})
 endif()
 
 add_library(dhtnet ${dhtnet_SOURCES})
-target_link_libraries(dhtnet PUBLIC PkgConfig::opendht PkgConfig::pjproject fmt::fmt ${MSGPACK_LIB})
+if (NOT MSVC)
+    target_link_libraries(dhtnet PUBLIC PkgConfig::opendht PkgConfig::pjproject fmt::fmt ${MSGPACK_LIB})
+else()
+    target_link_libraries(dhtnet PUBLIC
+        ${WIN32_DEP_DIR}/../msvc/lib/libopendht.lib
+        ${WIN32_DEP_DIR}/../msvc/lib/libpjproject.lib
+        ${WIN32_DEP_DIR}/../msvc/lib/libfmt.lib
+        ${WIN32_DEP_DIR}/../msvc/lib/libmsgpackc-cxx.lib)
+endif()
 if (APPLE)
     target_link_libraries(dhtnet PRIVATE "-framework CoreFoundation" "-framework Security" "resolv")
 endif()
@@ -116,19 +172,35 @@
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
     $<INSTALL_INTERFACE:include>
 )
-if (DHTNET_PUPNP)
-    target_compile_definitions(dhtnet PRIVATE HAVE_LIBUPNP)
-    target_link_libraries(dhtnet PRIVATE PkgConfig::upnp)
+
+target_compile_definitions(dhtnet PRIVATE ${dhtnet_PRIVATE_DEFS})
+target_link_libraries(dhtnet PRIVATE ${dhtnet_PRIVATELIBS})
+if (MSVC)
+    target_compile_definitions(dhtnet PRIVATE
+        _CRT_SECURE_NO_WARNINGS
+        _WINSOCK_DEPRECATED_NO_WARNINGS
+        ASIO_STANDALONE
+        _WIN32_WINNT=0x0601
+        MSGPACK_NO_BOOST
+        MSGPACK_DISABLE_LEGACY_NIL
+        MSGPACK_DISABLE_LEGACY_CONVERT
+        DHTNET_STATIC
+        DHTNET_STATIC_DEFINE
+        DHTNET_EXPORTS
+        DHTNET_BUILDING
+        DHT)
+    target_compile_options(dhtnet PRIVATE
+        /O2; /Oi; ${DEFAULT_CXX_RUNTIME_LIBRARY}; /Gy; /MP; /Oy-; /sdl-; /W0;
+        /FC; /FS; /nologo; /Zi; /wd4996; /wd4503; /wd4180; /wd4244; /wd4267;
+        /Zc:__cplusplus;
+        ${DEFAULT_CXX_EXCEPTION_HANDLING})
+else()
+    target_compile_definitions(dhtnet PUBLIC PJ_AUTOCONF=1)
 endif()
-if (DHTNET_NATPMP)
-    target_compile_definitions(dhtnet PRIVATE HAVE_LIBNATPMP)
-    target_link_libraries(dhtnet PRIVATE ${natpmp_LIBRARIES})
-endif()
-if (DHTNET_TESTABLE)
+
+if (BUILD_TESTING AND NOT MSVC)
     target_compile_definitions(dhtnet PUBLIC DHTNET_TESTABLE)
 endif()
-target_compile_definitions(dhtnet PUBLIC PJ_AUTOCONF=1)
-# set_target_properties(dhtnet PROPERTIES PUBLIC_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/include/${dhtnet_HEADERS}")
 
 configure_file(dhtnet.pc.in dhtnet.pc @ONLY)
 
@@ -137,7 +209,7 @@
 install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/include/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/dhtnet)
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/dhtnet.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 
-if (BUILD_TOOLS)
+if (BUILD_TOOLS AND NOT MSVC)
     add_executable(dnc
         tools/dnc/main.cpp
         tools/dnc/dnc.cpp
diff --git a/include/compat/msvc/windirent.h b/include/compat/msvc/windirent.h
new file mode 100644
index 0000000..ee9f552
--- /dev/null
+++ b/include/compat/msvc/windirent.h
@@ -0,0 +1,885 @@
+/*
+ * Dirent interface for Microsoft Visual Studio
+ * Version 1.21
+ *
+ * Copyright (C) 2006-2012 Toni Ronkko
+ * This file is part of dirent.  Dirent may be freely distributed
+ * under the MIT license.  For all details and documentation, see
+ * https://github.com/tronkko/dirent
+ */
+#ifndef DIRENT_H
+#define DIRENT_H
+
+/*
+ * Include windows.h without Windows Sockets 1.1 to prevent conflicts with
+ * Windows Sockets 2.0.
+ */
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <wchar.h>
+#include <string.h>
+#include <stdlib.h>
+#include <malloc.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+/* Indicates that d_type field is available in dirent structure */
+#define _DIRENT_HAVE_D_TYPE
+
+/* Indicates that d_namlen field is available in dirent structure */
+#define _DIRENT_HAVE_D_NAMLEN
+
+/* Entries missing from MSVC 6.0 */
+#if !defined(FILE_ATTRIBUTE_DEVICE)
+#define FILE_ATTRIBUTE_DEVICE 0x40
+#endif
+
+/* File type and permission flags for stat(), general mask */
+#if !defined(S_IFMT)
+#define S_IFMT _S_IFMT
+#endif
+
+/* Directory bit */
+#if !defined(S_IFDIR)
+#define S_IFDIR _S_IFDIR
+#endif
+
+/* Character device bit */
+#if !defined(S_IFCHR)
+#define S_IFCHR _S_IFCHR
+#endif
+
+/* Pipe bit */
+#if !defined(S_IFFIFO)
+#define S_IFFIFO _S_IFFIFO
+#endif
+
+/* Regular file bit */
+#if !defined(S_IFREG)
+#define S_IFREG _S_IFREG
+#endif
+
+/* Read permission */
+#if !defined(S_IREAD)
+#define S_IREAD _S_IREAD
+#endif
+
+/* Write permission */
+#if !defined(S_IWRITE)
+#define S_IWRITE _S_IWRITE
+#endif
+
+/* Execute permission */
+#if !defined(S_IEXEC)
+#define S_IEXEC _S_IEXEC
+#endif
+
+/* Pipe */
+#if !defined(S_IFIFO)
+#define S_IFIFO _S_IFIFO
+#endif
+
+/* Block device */
+#if !defined(S_IFBLK)
+#define S_IFBLK 0
+#endif
+
+/* Link */
+#if !defined(S_IFLNK)
+#define S_IFLNK 0
+#endif
+
+/* Socket */
+#if !defined(S_IFSOCK)
+#define S_IFSOCK 0
+#endif
+
+/* Read user permission */
+#if !defined(S_IRUSR)
+#define S_IRUSR S_IREAD
+#endif
+
+/* Write user permission */
+#if !defined(S_IWUSR)
+#define S_IWUSR S_IWRITE
+#endif
+
+/* Execute user permission */
+#if !defined(S_IXUSR)
+#define S_IXUSR 0
+#endif
+
+/* Read group permission */
+#if !defined(S_IRGRP)
+#define S_IRGRP 0
+#endif
+
+/* Write group permission */
+#if !defined(S_IWGRP)
+#define S_IWGRP 0
+#endif
+
+/* Execute group permission */
+#if !defined(S_IXGRP)
+#define S_IXGRP 0
+#endif
+
+/* Read others permission */
+#if !defined(S_IROTH)
+#define S_IROTH 0
+#endif
+
+/* Write others permission */
+#if !defined(S_IWOTH)
+#define S_IWOTH 0
+#endif
+
+/* Execute others permission */
+#if !defined(S_IXOTH)
+#define S_IXOTH 0
+#endif
+
+/* Maximum length of file name */
+#if !defined(PATH_MAX)
+#define PATH_MAX MAX_PATH
+#endif
+#if !defined(FILENAME_MAX)
+#define FILENAME_MAX MAX_PATH
+#endif
+#if !defined(NAME_MAX)
+#define NAME_MAX FILENAME_MAX
+#endif
+
+/* File type flags for d_type */
+#define DT_UNKNOWN 0
+#define DT_REG     S_IFREG
+#define DT_DIR     S_IFDIR
+#define DT_FIFO    S_IFIFO
+#define DT_SOCK    S_IFSOCK
+#define DT_CHR     S_IFCHR
+#define DT_BLK     S_IFBLK
+#define DT_LNK     S_IFLNK
+
+/* Macros for converting between st_mode and d_type */
+#define IFTODT(mode) ((mode) &S_IFMT)
+#define DTTOIF(type) (type)
+
+/*
+ * File type macros.  Note that block devices, sockets and links cannot be
+ * distinguished on Windows and the macros S_ISBLK, S_ISSOCK and S_ISLNK are
+ * only defined for compatibility.  These macros should always return false
+ * on Windows.
+ */
+#if !defined(S_ISFIFO)
+#define S_ISFIFO(mode) (((mode) &S_IFMT) == S_IFIFO)
+#endif
+#if !defined(S_ISDIR)
+#define S_ISDIR(mode) (((mode) &S_IFMT) == S_IFDIR)
+#endif
+#if !defined(S_ISREG)
+#define S_ISREG(mode) (((mode) &S_IFMT) == S_IFREG)
+#endif
+#if !defined(S_ISLNK)
+#define S_ISLNK(mode) (((mode) &S_IFMT) == S_IFLNK)
+#endif
+#if !defined(S_ISSOCK)
+#define S_ISSOCK(mode) (((mode) &S_IFMT) == S_IFSOCK)
+#endif
+#if !defined(S_ISCHR)
+#define S_ISCHR(mode) (((mode) &S_IFMT) == S_IFCHR)
+#endif
+#if !defined(S_ISBLK)
+#define S_ISBLK(mode) (((mode) &S_IFMT) == S_IFBLK)
+#endif
+
+/* Return the exact length of d_namlen without zero terminator */
+#define _D_EXACT_NAMLEN(p) ((p)->d_namlen)
+
+/* Return number of bytes needed to store d_namlen */
+#define _D_ALLOC_NAMLEN(p) (PATH_MAX)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Wide-character version */
+struct _wdirent
+{
+    /* Always zero */
+    long d_ino;
+
+    /* Structure size */
+    unsigned short d_reclen;
+
+    /* Length of name without \0 */
+    size_t d_namlen;
+
+    /* File type */
+    int d_type;
+
+    /* File name */
+    wchar_t d_name[PATH_MAX];
+};
+typedef struct _wdirent _wdirent;
+
+struct _WDIR
+{
+    /* Current directory entry */
+    struct _wdirent ent;
+
+    /* Private file data */
+    WIN32_FIND_DATAW data;
+
+    /* True if data is valid */
+    int cached;
+
+    /* Win32 search handle */
+    HANDLE handle;
+
+    /* Initial directory name */
+    wchar_t* patt;
+};
+typedef struct _WDIR _WDIR;
+
+static _WDIR* _wopendir(const wchar_t* dirname);
+static struct _wdirent* _wreaddir(_WDIR* dirp);
+static int _wclosedir(_WDIR* dirp);
+static void _wrewinddir(_WDIR* dirp);
+
+/* For compatibility with Symbian */
+#define wdirent    _wdirent
+#define WDIR       _WDIR
+#define wopendir   _wopendir
+#define wreaddir   _wreaddir
+#define wclosedir  _wclosedir
+#define wrewinddir _wrewinddir
+
+/* Multi-byte character versions */
+struct dirent
+{
+    /* Always zero */
+    long d_ino;
+
+    /* Structure size */
+    unsigned short d_reclen;
+
+    /* Length of name without \0 */
+    size_t d_namlen;
+
+    /* File type */
+    int d_type;
+
+    /* File name */
+    char d_name[PATH_MAX];
+};
+typedef struct dirent dirent;
+
+struct DIR
+{
+    struct dirent ent;
+    struct _WDIR* wdirp;
+};
+typedef struct DIR DIR;
+
+static DIR* opendir(const char* dirname);
+static struct dirent* readdir(DIR* dirp);
+static int closedir(DIR* dirp);
+static void rewinddir(DIR* dirp);
+
+/* Internal utility functions */
+static WIN32_FIND_DATAW* dirent_first(_WDIR* dirp);
+static WIN32_FIND_DATAW* dirent_next(_WDIR* dirp);
+
+static int dirent_mbstowcs_s(
+    size_t* pReturnValue, wchar_t* wcstr, size_t sizeInWords, const char* mbstr, size_t count);
+
+static int dirent_wcstombs_s(
+    size_t* pReturnValue, char* mbstr, size_t sizeInBytes, const wchar_t* wcstr, size_t count);
+
+static void dirent_set_errno(int error);
+
+/*
+ * Open directory stream DIRNAME for read and return a pointer to the
+ * internal working area that is used to retrieve individual directory
+ * entries.
+ */
+static _WDIR*
+_wopendir(const wchar_t* dirname)
+{
+    _WDIR* dirp = NULL;
+    int error;
+
+    /* Must have directory name */
+    if (dirname == NULL || dirname[0] == '\0') {
+        dirent_set_errno(ENOENT);
+        return NULL;
+    }
+
+    /* Allocate new _WDIR structure */
+    dirp = (_WDIR*) malloc(sizeof(struct _WDIR));
+    if (dirp != NULL) {
+        DWORD n;
+
+        /* Reset _WDIR structure */
+        dirp->handle = INVALID_HANDLE_VALUE;
+        dirp->patt = NULL;
+        dirp->cached = 0;
+
+        /* Compute the length of full path plus zero terminator
+         *
+         * Note that on WinRT there's no way to convert relative paths
+         * into absolute paths, so just assume its an absolute path.
+         */
+#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP)
+        n = wcslen(dirname);
+#else
+        n = GetFullPathNameW(dirname, 0, NULL, NULL);
+#endif
+
+        /* Allocate room for absolute directory name and search pattern */
+        dirp->patt = (wchar_t*) malloc(sizeof(wchar_t) * n + 16);
+        if (dirp->patt) {
+            /*
+             * Convert relative directory name to an absolute one.  This
+             * allows rewinddir() to function correctly even when current
+             * working directory is changed between opendir() and rewinddir().
+             *
+             * Note that on WinRT there's no way to convert relative paths
+             * into absolute paths, so just assume its an absolute path.
+             */
+#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP)
+            wcsncpy_s(dirp->patt, n + 1, dirname, n);
+#else
+            n = GetFullPathNameW(dirname, n, dirp->patt, NULL);
+#endif
+            if (n > 0) {
+                wchar_t* p;
+
+                /* Append search pattern \* to the directory name */
+                p = dirp->patt + n;
+                if (dirp->patt < p) {
+                    switch (p[-1]) {
+                    case '\\':
+                    case '/':
+                    case ':':
+                        /* Directory ends in path separator, e.g. c:\temp\ */
+                        /*NOP*/;
+                        break;
+
+                    default:
+                        /* Directory name doesn't end in path separator */
+                        *p++ = '\\';
+                    }
+                }
+                *p++ = '*';
+                *p = '\0';
+
+                /* Open directory stream and retrieve the first entry */
+                if (dirent_first(dirp)) {
+                    /* Directory stream opened successfully */
+                    error = 0;
+                } else {
+                    /* Cannot retrieve first entry */
+                    error = 1;
+                    dirent_set_errno(ENOENT);
+                }
+
+            } else {
+                /* Cannot retrieve full path name */
+                dirent_set_errno(ENOENT);
+                error = 1;
+            }
+
+        } else {
+            /* Cannot allocate memory for search pattern */
+            error = 1;
+        }
+
+    } else {
+        /* Cannot allocate _WDIR structure */
+        error = 1;
+    }
+
+    /* Clean up in case of error */
+    if (error && dirp) {
+        _wclosedir(dirp);
+        dirp = NULL;
+    }
+
+    return dirp;
+}
+
+/*
+ * Read next directory entry.  The directory entry is returned in dirent
+ * structure in the d_name field.  Individual directory entries returned by
+ * this function include regular files, sub-directories, pseudo-directories
+ * "." and ".." as well as volume labels, hidden files and system files.
+ */
+static struct _wdirent*
+_wreaddir(_WDIR* dirp)
+{
+    WIN32_FIND_DATAW* datap;
+    struct _wdirent* entp;
+
+    /* Read next directory entry */
+    datap = dirent_next(dirp);
+    if (datap) {
+        size_t n;
+        DWORD attr;
+
+        /* Pointer to directory entry to return */
+        entp = &dirp->ent;
+
+        /*
+         * Copy file name as wide-character string.  If the file name is too
+         * long to fit in to the destination buffer, then truncate file name
+         * to PATH_MAX characters and zero-terminate the buffer.
+         */
+        n = 0;
+        while (n + 1 < PATH_MAX && datap->cFileName[n] != 0) {
+            entp->d_name[n] = datap->cFileName[n];
+            n++;
+        }
+        dirp->ent.d_name[n] = 0;
+
+        /* Length of file name excluding zero terminator */
+        entp->d_namlen = n;
+
+        /* File type */
+        attr = datap->dwFileAttributes;
+        if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
+            entp->d_type = DT_CHR;
+        } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
+            entp->d_type = DT_DIR;
+        } else {
+            entp->d_type = DT_REG;
+        }
+
+        /* Reset dummy fields */
+        entp->d_ino = 0;
+        entp->d_reclen = sizeof(struct _wdirent);
+
+    } else {
+        /* Last directory entry read */
+        entp = NULL;
+    }
+
+    return entp;
+}
+
+/*
+ * Close directory stream opened by opendir() function.  This invalidates the
+ * DIR structure as well as any directory entry read previously by
+ * _wreaddir().
+ */
+static int
+_wclosedir(_WDIR* dirp)
+{
+    int ok;
+    if (dirp) {
+        /* Release search handle */
+        if (dirp->handle != INVALID_HANDLE_VALUE) {
+            FindClose(dirp->handle);
+            dirp->handle = INVALID_HANDLE_VALUE;
+        }
+
+        /* Release search pattern */
+        if (dirp->patt) {
+            free(dirp->patt);
+            dirp->patt = NULL;
+        }
+
+        /* Release directory structure */
+        free(dirp);
+        ok = /*success*/ 0;
+
+    } else {
+        /* Invalid directory stream */
+        dirent_set_errno(EBADF);
+        ok = /*failure*/ -1;
+    }
+    return ok;
+}
+
+/*
+ * Rewind directory stream such that _wreaddir() returns the very first
+ * file name again.
+ */
+static void
+_wrewinddir(_WDIR* dirp)
+{
+    if (dirp) {
+        /* Release existing search handle */
+        if (dirp->handle != INVALID_HANDLE_VALUE) {
+            FindClose(dirp->handle);
+        }
+
+        /* Open new search handle */
+        dirent_first(dirp);
+    }
+}
+
+/* Get first directory entry (internal) */
+static WIN32_FIND_DATAW*
+dirent_first(_WDIR* dirp)
+{
+    WIN32_FIND_DATAW* datap;
+
+    /* Open directory and retrieve the first entry */
+    dirp->handle = FindFirstFileExW(dirp->patt,
+                                    FindExInfoStandard,
+                                    &dirp->data,
+                                    FindExSearchNameMatch,
+                                    NULL,
+                                    0);
+    if (dirp->handle != INVALID_HANDLE_VALUE) {
+        /* a directory entry is now waiting in memory */
+        datap = &dirp->data;
+        dirp->cached = 1;
+
+    } else {
+        /* Failed to re-open directory: no directory entry in memory */
+        dirp->cached = 0;
+        datap = NULL;
+    }
+    return datap;
+}
+
+/* Get next directory entry (internal) */
+static WIN32_FIND_DATAW*
+dirent_next(_WDIR* dirp)
+{
+    WIN32_FIND_DATAW* p;
+
+    /* Get next directory entry */
+    if (dirp->cached != 0) {
+        /* A valid directory entry already in memory */
+        p = &dirp->data;
+        dirp->cached = 0;
+
+    } else if (dirp->handle != INVALID_HANDLE_VALUE) {
+        /* Get the next directory entry from stream */
+        if (FindNextFileW(dirp->handle, &dirp->data) != FALSE) {
+            /* Got a file */
+            p = &dirp->data;
+        } else {
+            /* The very last entry has been processed or an error occurred */
+            FindClose(dirp->handle);
+            dirp->handle = INVALID_HANDLE_VALUE;
+            p = NULL;
+        }
+
+    } else {
+        /* End of directory stream reached */
+        p = NULL;
+    }
+
+    return p;
+}
+
+/*
+ * Open directory stream using plain old C-string.
+ */
+static DIR*
+opendir(const char* dirname)
+{
+    struct DIR* dirp;
+    int error;
+
+    /* Must have directory name */
+    if (dirname == NULL || dirname[0] == '\0') {
+        dirent_set_errno(ENOENT);
+        return NULL;
+    }
+
+    /* Allocate memory for DIR structure */
+    dirp = (DIR*) malloc(sizeof(struct DIR));
+    if (dirp) {
+        wchar_t wname[PATH_MAX];
+        size_t n;
+
+        /* Convert directory name to wide-character string */
+        error = dirent_mbstowcs_s(&n, wname, PATH_MAX, dirname, PATH_MAX);
+        if (!error) {
+            /* Open directory stream using wide-character name */
+            dirp->wdirp = _wopendir(wname);
+            if (dirp->wdirp) {
+                /* Directory stream opened */
+                error = 0;
+            } else {
+                /* Failed to open directory stream */
+                error = 1;
+            }
+
+        } else {
+            /*
+             * Cannot convert file name to wide-character string.  This
+             * occurs if the string contains invalid multi-byte sequences or
+             * the output buffer is too small to contain the resulting
+             * string.
+             */
+            error = 1;
+        }
+
+    } else {
+        /* Cannot allocate DIR structure */
+        error = 1;
+    }
+
+    /* Clean up in case of error */
+    if (error && dirp) {
+        free(dirp);
+        dirp = NULL;
+    }
+
+    return dirp;
+}
+
+/*
+ * Read next directory entry.
+ *
+ * When working with text consoles, please note that file names returned by
+ * readdir() are represented in the default ANSI code page while any output to
+ * console is typically formatted on another code page.  Thus, non-ASCII
+ * characters in file names will not usually display correctly on console.  The
+ * problem can be fixed in two ways: (1) change the character set of console
+ * to 1252 using chcp utility and use Lucida Console font, or (2) use
+ * _cprintf function when writing to console.  The _cprinf() will re-encode
+ * ANSI strings to the console code page so many non-ASCII characters will
+ * display correcly.
+ */
+static struct dirent*
+readdir(DIR* dirp)
+{
+    WIN32_FIND_DATAW* datap;
+    struct dirent* entp;
+
+    /* Read next directory entry */
+    datap = dirent_next(dirp->wdirp);
+    if (datap) {
+        size_t n;
+        int error;
+
+        /* Attempt to convert file name to multi-byte string */
+        error = dirent_wcstombs_s(&n, dirp->ent.d_name, PATH_MAX, datap->cFileName, PATH_MAX);
+
+        /*
+         * If the file name cannot be represented by a multi-byte string,
+         * then attempt to use old 8+3 file name.  This allows traditional
+         * Unix-code to access some file names despite of unicode
+         * characters, although file names may seem unfamiliar to the user.
+         *
+         * Be ware that the code below cannot come up with a short file
+         * name unless the file system provides one.  At least
+         * VirtualBox shared folders fail to do this.
+         */
+        if (error && datap->cAlternateFileName[0] != '\0') {
+            error = dirent_wcstombs_s(&n,
+                                      dirp->ent.d_name,
+                                      PATH_MAX,
+                                      datap->cAlternateFileName,
+                                      PATH_MAX);
+        }
+
+        if (!error) {
+            DWORD attr;
+
+            /* Initialize directory entry for return */
+            entp = &dirp->ent;
+
+            /* Length of file name excluding zero terminator */
+            entp->d_namlen = n - 1;
+
+            /* File attributes */
+            attr = datap->dwFileAttributes;
+            if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
+                entp->d_type = DT_CHR;
+            } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
+                entp->d_type = DT_DIR;
+            } else {
+                entp->d_type = DT_REG;
+            }
+
+            /* Reset dummy fields */
+            entp->d_ino = 0;
+            entp->d_reclen = sizeof(struct dirent);
+
+        } else {
+            /*
+             * Cannot convert file name to multi-byte string so construct
+             * an errornous directory entry and return that.  Note that
+             * we cannot return NULL as that would stop the processing
+             * of directory entries completely.
+             */
+            entp = &dirp->ent;
+            entp->d_name[0] = '?';
+            entp->d_name[1] = '\0';
+            entp->d_namlen = 1;
+            entp->d_type = DT_UNKNOWN;
+            entp->d_ino = 0;
+            entp->d_reclen = 0;
+        }
+
+    } else {
+        /* No more directory entries */
+        entp = NULL;
+    }
+
+    return entp;
+}
+
+/*
+ * Close directory stream.
+ */
+static int
+closedir(DIR* dirp)
+{
+    int ok;
+    if (dirp) {
+        /* Close wide-character directory stream */
+        ok = _wclosedir(dirp->wdirp);
+        dirp->wdirp = NULL;
+
+        /* Release multi-byte character version */
+        free(dirp);
+
+    } else {
+        /* Invalid directory stream */
+        dirent_set_errno(EBADF);
+        ok = /*failure*/ -1;
+    }
+    return ok;
+}
+
+/*
+ * Rewind directory stream to beginning.
+ */
+static void
+rewinddir(DIR* dirp)
+{
+    /* Rewind wide-character string directory stream */
+    _wrewinddir(dirp->wdirp);
+}
+
+/* Convert multi-byte string to wide character string */
+static int
+dirent_mbstowcs_s(
+    size_t* pReturnValue, wchar_t* wcstr, size_t sizeInWords, const char* mbstr, size_t count)
+{
+    int error;
+
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+
+    /* Microsoft Visual Studio 2005 or later */
+    error = mbstowcs_s(pReturnValue, wcstr, sizeInWords, mbstr, count);
+
+#else
+
+    /* Older Visual Studio or non-Microsoft compiler */
+    size_t n;
+
+    /* Convert to wide-character string (or count characters) */
+    n = mbstowcs(wcstr, mbstr, sizeInWords);
+    if (!wcstr || n < count) {
+        /* Zero-terminate output buffer */
+        if (wcstr && sizeInWords) {
+            if (n >= sizeInWords) {
+                n = sizeInWords - 1;
+            }
+            wcstr[n] = 0;
+        }
+
+        /* Length of resuting multi-byte string WITH zero terminator */
+        if (pReturnValue) {
+            *pReturnValue = n + 1;
+        }
+
+        /* Success */
+        error = 0;
+
+    } else {
+        /* Could not convert string */
+        error = 1;
+    }
+
+#endif
+
+    return error;
+}
+
+/* Convert wide-character string to multi-byte string */
+static int
+dirent_wcstombs_s(size_t* pReturnValue,
+                  char* mbstr,
+                  size_t sizeInBytes, /* max size of mbstr */
+                  const wchar_t* wcstr,
+                  size_t count)
+{
+    int error;
+
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+
+    /* Microsoft Visual Studio 2005 or later */
+    error = wcstombs_s(pReturnValue, mbstr, sizeInBytes, wcstr, count);
+
+#else
+
+    /* Older Visual Studio or non-Microsoft compiler */
+    size_t n;
+
+    /* Convert to multi-byte string (or count the number of bytes needed) */
+    n = wcstombs(mbstr, wcstr, sizeInBytes);
+    if (!mbstr || n < count) {
+        /* Zero-terminate output buffer */
+        if (mbstr && sizeInBytes) {
+            if (n >= sizeInBytes) {
+                n = sizeInBytes - 1;
+            }
+            mbstr[n] = '\0';
+        }
+
+        /* Length of resulting multi-bytes string WITH zero-terminator */
+        if (pReturnValue) {
+            *pReturnValue = n + 1;
+        }
+
+        /* Success */
+        error = 0;
+
+    } else {
+        /* Cannot convert string */
+        error = 1;
+    }
+
+#endif
+
+    return error;
+}
+
+/* Set errno variable */
+static void
+dirent_set_errno(int error)
+{
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+
+    /* Microsoft Visual Studio 2005 and later */
+    _set_errno(error);
+
+#else
+
+    /* Non-Microsoft compiler or older Microsoft compiler */
+    errno = error;
+
+#endif
+}
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*DIRENT_H*/
diff --git a/include/ice_transport.h b/include/ice_transport.h
index c5047b3..8c69e93 100644
--- a/include/ice_transport.h
+++ b/include/ice_transport.h
@@ -26,6 +26,11 @@
 #include <vector>
 #include <chrono>
 
+#if defined(_MSC_VER)
+#include <BaseTsd.h>
+using ssize_t = SSIZE_T;
+#endif
+
 extern "C" {
 struct pj_ice_sess_cand;
 }
diff --git a/src/ip_utils.cpp b/src/ip_utils.cpp
index ad03123..9cd5c0f 100644
--- a/src/ip_utils.cpp
+++ b/src/ip_utils.cpp
@@ -69,7 +69,6 @@
     return hostname;
 }
 
-
 ip_utils::IpInterfaceAddress
 ip_utils::getHostName()
 {
@@ -80,42 +79,47 @@
     struct hostent* h = NULL;
     struct sockaddr_in localAddr;
     memset(&localAddr, 0, sizeof(localAddr));
-    gethostname(out, out_len);
+    char out[256];
+    if (gethostname(out, sizeof(out)) == SOCKET_ERROR) {
+        return {};
+    }
     h = gethostbyname(out);
     if (h != NULL) {
-        memcpy(&localAddr.sin_addr, h->h_addr_list[0], 4);
+        memcpy(&localAddr.sin_addr, h->h_addr_list[0], sizeof(localAddr.sin_addr));
         p = inet_ntop(AF_INET, &localAddr.sin_addr, tempstr, sizeof(tempstr));
-        if (p)
+        if (p) {
             ret.address = p;
+        } else {
+            return {};
+        }
+    } else {
+        return {};
     }
 #elif (defined(BSD) && BSD >= 199306) || defined(__FreeBSD_kernel__)
     struct ifaddrs* ifap;
     struct ifaddrs* ifa;
-    if (getifaddrs(&ifap) != 0)
+    if (getifaddrs(&ifap) != 0) {
         return {};
+    }
     // Cycle through available interfaces.
     for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
         // Skip loopback, point-to-point and down interfaces.
         // except don't skip down interfaces if we're trying to get
         // a list of configurable interfaces.
-        if ((ifa->ifa_flags & IFF_LOOPBACK) || (!(ifa->ifa_flags & IFF_UP)))
+        if ((ifa->ifa_flags & IFF_LOOPBACK) || (!(ifa->ifa_flags & IFF_UP))) {
             continue;
+        }
         auto family = ifa->ifa_addr->sa_family;
         if (family == AF_INET) {
-            void* addr;
-            if (family == AF_INET) {
-                if (((struct sockaddr_in*) (ifa->ifa_addr))->sin_addr.s_addr == htonl(INADDR_LOOPBACK))
-                    continue;
-                addr = &((struct sockaddr_in*) (ifa->ifa_addr))->sin_addr;
+            void* addr = &((struct sockaddr_in*)ifa->ifa_addr)->sin_addr;
+            if (((struct sockaddr_in*)ifa->ifa_addr)->sin_addr.s_addr == htonl(INADDR_LOOPBACK)) {
+                continue;
             }
-
             ret.interface = ifa->ifa_name;
-            p = inet_ntop(family,
-                          addr,
-                          tempstr,
-                          sizeof(tempstr));
-            if (p)
+            p = inet_ntop(family, addr, tempstr, sizeof(tempstr));
+            if (p) {
                 ret.address = p;
+            }
             break;
         }
     }
@@ -133,21 +137,22 @@
     memset(&localAddr, 0, sizeof(localAddr));
     // Create an unbound datagram socket to do the SIOCGIFADDR ioctl on.
     localSock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
-    if (localSock == INVALID_SOCKET)
-        return ret;
+    if (localSock == INVALID_SOCKET) {
+        return {};
+    }
     /* Get the interface configuration information... */
-    ifConf.ifc_len = (int) sizeof szBuffer;
-    ifConf.ifc_ifcu.ifcu_buf = (caddr_t) szBuffer;
+    ifConf.ifc_len = sizeof(szBuffer);
+    ifConf.ifc_buf = (caddr_t)szBuffer;
     nResult = ioctl(localSock, SIOCGIFCONF, &ifConf);
     if (nResult < 0) {
         close(localSock);
-        return ret;
+        return {};
     }
     unsigned int i;
     unsigned int j = 0;
     // Cycle through the list of interfaces looking for IP addresses.
-    for (i = 0u; i < (unsigned int) ifConf.ifc_len && j < MIN_INTERFACE;) {
-        struct ifreq* pifReq = (struct ifreq*) ((caddr_t) ifConf.ifc_req + i);
+    for (i = 0u; i < ifConf.ifc_len && j < MIN_INTERFACE;) {
+        struct ifreq* pifReq = (struct ifreq*)((caddr_t)ifConf.ifc_req + i);
         i += sizeof *pifReq;
         // See if this is the sort of interface we want to deal with.
         memset(ifReq.ifr_name, 0, sizeof(ifReq.ifr_name));
@@ -156,8 +161,9 @@
         // Skip loopback, point-to-point and down interfaces.
         // except don't skip down interfaces if we're trying to get
         // a list of configurable interfaces.
-        if ((ifReq.ifr_flags & IFF_LOOPBACK) || (!(ifReq.ifr_flags & IFF_UP)))
+        if ((ifReq.ifr_flags & IFF_LOOPBACK) || (!(ifReq.ifr_flags & IFF_UP))) {
             continue;
+        }
         if (pifReq->ifr_addr.sa_family == AF_INET) {
             if (((sockaddr_in*)&pifReq->ifr_addr)->sin_addr.s_addr == htonl(INADDR_LOOPBACK)) {
                 // We don't want the loopback interface. Go to the next one.
@@ -174,6 +180,9 @@
         j++; // Increment j if we found an address which is not loopback and is up.
     }
     close(localSock);
+    if (p == NULL) {
+        return {};
+    }
 #endif
     return ret;
 }