#ifndef _NETINET_TCP_H
#define _NETINET_TCP_H
+#include <features.h>
+
#define TCP_NODELAY 1
+#define TCP_MAXSEG 2
+#define TCP_CORK 3
+#define TCP_KEEPIDLE 4
+#define TCP_KEEPINTVL 5
+#define TCP_KEEPCNT 6
+#define TCP_SYNCNT 7
+#define TCP_LINGER2 8
+#define TCP_DEFER_ACCEPT 9
+#define TCP_WINDOW_CLAMP 10
+#define TCP_INFO 11
+#define TCP_QUICKACK 12
+#define TCP_CONGESTION 13
+#define TCP_MD5SIG 14
+
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#include <sys/types.h>
+#include <sys/socket.h>
+#endif
#endif