williamr@2: /* TCP.H
williamr@2:  * 
williamr@2:  * Portions copyright (c) 1997-1999 Symbian Ltd.  All rights reserved.
williamr@2:  */
williamr@2: 
williamr@2: /** @file
williamr@2: @publishedAll
williamr@2: @released
williamr@2: */
williamr@2: 
williamr@2: /*
williamr@2:  * Copyright (c) 1982, 1986 Regents of the University of California.
williamr@2:  * All rights reserved.  The Berkeley software License Agreement
williamr@2:  * specifies the terms and conditions for redistribution.
williamr@2:  */
williamr@2: 
williamr@2: #ifndef	_NETINET_TCP_H
williamr@2: #define	_NETINET_TCP_H
williamr@2: 
williamr@2: #ifdef	__cplusplus
williamr@2: extern "C" {
williamr@2: #endif
williamr@2: 
williamr@2: typedef	u_long	tcp_seq;
williamr@2: /**
williamr@2: TCP header.
williamr@2: Per RFC 793, September, 1981.
williamr@2: @internalComponent
williamr@2: */
williamr@2: struct tcphdr {
williamr@2: 	u_short	th_sport;		/* source port */
williamr@2: 	u_short	th_dport;		/* destination port */
williamr@2: 	tcp_seq	th_seq;			/* sequence number */
williamr@2: 	tcp_seq	th_ack;			/* acknowledgement number */
williamr@2: #ifdef _BIT_FIELDS_LTOH
williamr@2: 	u_int	th_x2:4,		/* (unused) */
williamr@2: 		th_off:4;		/* data offset */
williamr@2: #else
williamr@2: 	u_int	th_off:4,		/* data offset */
williamr@2: 		th_x2:4;		/* (unused) */
williamr@2: #endif
williamr@2: 	u_char	th_flags;
williamr@2: /**
williamr@2: @internalComponent
williamr@2: */
williamr@2: #define	TH_FIN	0x01
williamr@2: /**
williamr@2: @internalComponent
williamr@2: */
williamr@2: #define	TH_SYN	0x02
williamr@2: /**
williamr@2: @internalComponent
williamr@2: */
williamr@2: #define	TH_RST	0x04
williamr@2: /**
williamr@2: @internalComponent
williamr@2: */
williamr@2: #define	TH_PUSH	0x08
williamr@2: /**
williamr@2: @internalComponent
williamr@2: */
williamr@2: #define	TH_ACK	0x10
williamr@2: /**
williamr@2: @internalComponent
williamr@2: */
williamr@2: #define	TH_URG	0x20
williamr@2: 	u_short	th_win;			/* window */
williamr@2: 	u_short	th_sum;			/* checksum */
williamr@2: 	u_short	th_urp;			/* urgent pointer */
williamr@2: };
williamr@2: 
williamr@2: #define	TCPOPT_EOL	0
williamr@2: #define	TCPOPT_NOP	1
williamr@2: #define	TCPOPT_MAXSEG	2
williamr@2: 
williamr@2: /**
williamr@2: Default maximum segment size for TCP.
williamr@2: With an IP MSS of 576, this is 536,
williamr@2: but 512 is probably more convenient.
williamr@2: */
williamr@2: #ifdef	lint
williamr@2: #define	TCP_MSS	536
williamr@2: #else
williamr@2: #define	TCP_MSS	MIN(512, IP_MSS - sizeof (struct tcpiphdr))
williamr@2: #endif
williamr@2: 
williamr@2: /**
williamr@2: User-settable options (used with setsockopt).
williamr@2: */
williamr@2: #define	TCP_NODELAY	0x01	/* don't delay send to coalesce packets */
williamr@2: #define	TCP_MAXSEG	0x02	/* set maximum segment size */
williamr@2: 
williamr@2: #define	TCP_NOTIFY_THRESHOLD		0x10
williamr@2: #define	TCP_ABORT_THRESHOLD		0x11
williamr@2: #define	TCP_CONN_NOTIFY_THRESHOLD	0x12
williamr@2: #define	TCP_CONN_ABORT_THRESHOLD	0x13
williamr@2: 
williamr@2: 
williamr@2: #ifdef	__cplusplus
williamr@2: }
williamr@2: #endif
williamr@2: 
williamr@2: #endif	/* _NETINET_TCP_H */