Initial revision

1 files changed, 72 insertions, 0 deletions

diff --git a/include/netinet/ip_tcp.h b/include/netinet/ip_tcp.h
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+++ b/include/netinet/ip_tcp.h
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+/*
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *	@(#)tcp.h	7.5 (Berkeley) 6/29/88
+ */
+
+#ifndef _NETINET_IP_TCP_H
+#define _NETINET_IP_TCP_H
+
+#include <endian.h>
+#include <linux/socket.h>
+#include <sys/types.h>
+
+typedef	u_long	tcp_seq;
+/*
+ * TCP header.
+ * Per RFC 793, September, 1981.
+ */
+struct tcphdr {
+	u_short	th_sport;		/* source port */
+	u_short	th_dport;		/* destination port */
+	tcp_seq	th_seq;			/* sequence number */
+	tcp_seq	th_ack;			/* acknowledgement number */
+#if __BYTE_ORDER == __LITTLE_ENDIAN 
+	u_char	th_x2:4,		/* (unused) */
+		th_off:4;		/* data offset */
+#endif
+#if __BYTE_ORDER == __BIG_ENDIAN 
+	u_char	th_off:4,		/* data offset */
+		th_x2:4;		/* (unused) */
+#endif
+	u_char	th_flags;
+#define	TH_FIN	0x01
+#define	TH_SYN	0x02
+#define	TH_RST	0x04
+#define	TH_PUSH	0x08
+#define	TH_ACK	0x10
+#define	TH_URG	0x20
+	u_short	th_win;			/* window */
+	u_short	th_sum;			/* checksum */
+	u_short	th_urp;			/* urgent pointer */
+};
+
+#define	TCPOPT_EOL	0
+#define	TCPOPT_NOP	1
+#define	TCPOPT_MAXSEG	2
+
+/*
+ * Default maximum segment size for TCP.
+ * With an IP MSS of 576, this is 536,
+ * but 512 is probably more convenient.
+ */
+#ifdef	lint
+#define	TCP_MSS	536
+#else
+#define	TCP_MSS	MIN(512, IP_MSS - sizeof (struct tcpiphdr))
+#endif
+
+#endif /* _NETINET_TCP_H */