new file mode 100644
--- /dev/null
+++ b/src/os/unix/ngx_socket.h
@@ -0,0 +1,60 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#ifndef _NGX_SOCKET_H_INCLUDED_
+#define _NGX_SOCKET_H_INCLUDED_
+
+
+#include <ngx_config.h>
+
+
+#define NGX_WRITE_SHUTDOWN SHUT_WR
+
+typedef int  ngx_socket_t;
+
+#define ngx_socket(af, type, proto, flags)   socket(af, type, proto)
+#define ngx_socket_n        "socket()"
+
+
+#if (HAVE_FIONBIO)
+
+int ngx_nonblocking(ngx_socket_t s);
+int ngx_blocking(ngx_socket_t s);
+
+#define ngx_nonblocking_n   "ioctl(FIONBIO)"
+#define ngx_blocking_n      "ioctl(!FIONBIO)"
+
+#else
+
+#define ngx_nonblocking(s)  fcntl(s, F_SETFL, O_NONBLOCK)
+#define ngx_nonblocking_n   "fcntl(O_NONBLOCK)"
+
+#endif
+
+int ngx_tcp_nopush(ngx_socket_t s);
+int ngx_tcp_push(ngx_socket_t s);
+
+#ifdef __linux__
+
+#define ngx_tcp_nopush_n   "setsockopt(TCP_CORK)"
+#define ngx_tcp_push_n     "setsockopt(!TCP_CORK)"
+
+#else
+
+#define ngx_tcp_nopush_n   "setsockopt(TCP_NOPUSH)"
+#define ngx_tcp_push_n     "setsockopt(!TCP_NOPUSH)"
+
+#endif
+
+
+#define ngx_shutdown_socket    shutdown
+#define ngx_shutdown_socket_n  "shutdown()"
+
+#define ngx_close_socket    close
+#define ngx_close_socket_n  "close()"
+
+
+#endif /* _NGX_SOCKET_H_INCLUDED_ */