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Length: 1784 (0x6f8)
Types: TextFile
Notes: @(#)tcp.h 13.1 (RC International) 91/02/02 */
Names: »tcp.h«
└─⟦50656ff4a⟧ Bits:30010538 TX 3.1 Coldstart
└─⟦bbf173f5c⟧ »0004«
└─⟦this⟧ »./usr/include/netinet/tcp.h«
/* @(#)tcp.h 13.1 (RC International) 91/02/02 */
/*
* 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 this notice is preserved and that due credit is given
* to the University of California at 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'' without express or implied warranty.
*
* @(-)tcp.h 7.4.1.1 (Berkeley) 2/7/88
*/
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 */
#ifdef MIPSEL
u_char th_x2:4, /* (unused) */
th_off:4; /* data offset */
#endif MIPSEL
#ifdef MIPSEB
u_char th_off:4, /* data offset */
th_x2:4; /* (unused) */
#endif MIPSEB
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
/*
* User-settable options (used with setsockopt).
*/
#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
#define TCP_MAXSEG 0x02 /* set maximum segment size */