diff --git a/src/core/ngx_config.h b/src/core/ngx_config.h
index 690cb32..b724129 100644
--- a/src/core/ngx_config.h
+++ b/src/core/ngx_config.h
@@ -4,218 +4,59 @@
 
 #include <ngx_auto_config.h>
 
-/*
-   auto_conf
-   ngx_inline inline __inline __inline__
-*/
 
-/* STUB */
+#if defined __FreeBSD__
+#include <ngx_freebsd_config.h>
+
+
+#elif defined __linux__
+#include <ngx_linux_config.h>
+
+
+       /* Solaris */
+#elif defined(sun) && (defined(__svr4__) || defined(__SVR4))
+#include <ngx_solaris_config.h>
+
+
+#elif defined _WIN32
+
+/* STUB to allocate a big ngx_connections */
 #undef  FD_SETSIZE
 #define FD_SETSIZE  1024
 
+#include <ngx_win32_config.h>
 
-/* auto_conf */
-#define NGX_ALIGN       (4 - 1)
-#define NGX_ALIGN_TYPE  unsigned
 
-#define ngx_align(p)    (char *) (((NGX_ALIGN_TYPE) p + NGX_ALIGN) & ~NGX_ALIGN)
+#else /* posix */
+
+#endif
 
 
 
-/* Platform specific: array[NGX_INVALID_ARRAY_INDEX] should cause SIGSEGV */
+/* TODO: platform specific: array[NGX_INVALID_ARRAY_INDEX] must cause SIGSEGV */
 #define NGX_INVALID_ARRAY_INDEX 0x80000000
 
 
-#ifdef _WIN32
+/* TODO: auto_conf */
+#define NGX_ALIGN       (4 - 1)
+#define NGX_ALIGN_TYPE  (unsigned int)
 
-#define WIN32 1
-
-#include <winsock2.h>
-#include <mswsock.h>
-#include <stddef.h>    /* offsetof */
-#include <stdio.h>
-#include <stdarg.h>
+#define ngx_align(p)    (char *) ((NGX_ALIGN_TYPE p + NGX_ALIGN) & ~NGX_ALIGN)
 
 
-#define ngx_inline   __inline
-
-
-#ifndef HAVE_INHERITED_NONBLOCK
-#define HAVE_INHERITED_NONBLOCK  1
-#endif
-
-#ifndef HAVE_WIN32_TRANSMITPACKETS
-#define HAVE_WIN32_TRANSMITPACKETS  1
-#define HAVE_WIN32_TRANSMITFILE     0
-#endif
-
-#ifndef HAVE_WIN32_TRANSMITFILE
-#define HAVE_WIN32_TRANSMITFILE  1
-#endif
-
-#if (HAVE_WIN32_TRANSMITPACKETS) || (HAVE_WIN32_TRANSMITFILE)
-#define HAVE_SENDFILE  1
-#endif
-
-#else /* POSIX */
-
-
-
-/* Solaris */
-#if defined(sun) && (defined(__svr4__) || defined(__SVR4))
-
-#define SOLARIS  1
-
-#define _FILE_OFFSET_BITS  64  /* should be before sys/types.h */
-
-#ifndef HAVE_INHERITED_NONBLOCK
-#define HAVE_INHERITED_NONBLOCK  1
-#endif
-
-#include <sys/stropts.h>        /* INFTIM */
-
-#endif /* Solaris */
-
-
-
-#include <unistd.h>
-#include <stddef.h>             /* offsetof */
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <sys/wait.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-#include <sys/uio.h>
-#include <sys/resource.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-
-
-#ifndef HAVE_POLL
-#define HAVE_POLL  1
-#include <poll.h>
-#endif
-
-
-#if (HAVE_DEVPOLL) && !(TEST_DEVPOLL)
-#include <sys/ioctl.h>
-#include <sys/devpoll.h>        /* Solaris, HP/UX */
-#endif
-
-
-#if (HAVE_AIO)
-#include <aio.h>
-#endif
-
-
+/* TODO: auto_conf: ngx_inline   inline __inline __inline__ */
+#ifndef ngx_inline
 #define ngx_inline   inline
+#endif
 
 
-#endif /* POSIX */
-
-
-
-#define LF     10
-#define CR     13
-#define CRLF   "\x0d\x0a"
-
+#ifndef INADDR_NONE    /* Solaris */
+#define INADDR_NONE ((unsigned long) -1)
+#endif
 
 #ifndef INET_ADDRSTRLEN
 #define INET_ADDRSTRLEN 16
 #endif
 
 
-#if defined SO_ACCEPTFILTER || defined TCP_DEFER_ACCEPT
-
-#ifndef HAVE_DEFERRED_ACCEPT
-#define HAVE_DEFERRED_ACCEPT  1
-#endif
-
-#endif
-
-
-#ifndef HAVE_SELECT
-#define HAVE_SELECT 1
-#endif
-
-
-#ifdef __FreeBSD__
-
-#include <osreldate.h>
-
-#ifndef HAVE_INHERITED_NONBLOCK
-#define HAVE_INHERITED_NONBLOCK  1
-#endif
-
-/* FreeBSD sendfile */
-#if __FreeBSD_version >= 300007
-
-#ifndef HAVE_FREEBSD_SENDFILE
-#define HAVE_FREEBSD_SENDFILE  1
-#endif
-
-#ifndef HAVE_FREEBSD_SENDFILE_NBYTES_BUG
-#define HAVE_FREEBSD_SENDFILE_NBYTES_BUG  2
-#endif
-
-#endif /* FreeBSD sendfile */
-
-/* FreeBSD sendfile nbytes bug */
-#if (__FreeBSD__ == 4 && __FreeBSD_version >= 460100) \
-    || __FreeBSD_version == 460001 \
-    || __FreeBSD_version >= 500029
-
-#if (HAVE_FREEBSD_SENDFILE_NBYTES_BUG == 2)
-#undef  HAVE_FREEBSD_SENDFILE_NBYTES_BUG
-#define HAVE_FREEBSD_SENDFILE_NBYTES_BUG  0
-#endif
-
-#endif /* FreeBSD sendfile nbytes bug */
-
-#if (HAVE_FREEBSD_SENDFILE)
-#define HAVE_SENDFILE  1
-#endif
-
-
-/* FreeBSD kqueue */
-#if (__FreeBSD__ == 4 && __FreeBSD_version >= 410000) \
-    || __FreeBSD_version >= 500011
-
-#ifndef HAVE_KQUEUE
-#define HAVE_KQUEUE  1
-#include <sys/event.h>
-#endif
-
-/* kqueue's NOTE_LOWAT */
-#if (__FreeBSD__ == 4 && __FreeBSD_version >= 430000) \
-    || __FreeBSD_version >= 500018
-
-#ifndef HAVE_LOWAT_EVENT
-#define HAVE_LOWAT_EVENT  1
-#endif
-
-#endif
-
-#endif /* FreeBSD kqueue */
-
-
-#endif /* __FreeBSD__ */
-
-
-#ifdef __SOME_OS_TEMPLATE__
-
-#ifndef HAVE_INHERITED_NONBLOCK
-#define HAVE_INHERITED_NONBLOCK  1
-#endif
-
-#endif
-
-
 #endif /* _NGX_CONFIG_H_INCLUDED_ */