usr/src/sys/netinet/tcpip.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution is only permitted until one year after the first shipment
 * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
 * binary forms are permitted provided that: (1) source distributions retain
 * this entire copyright notice and comment, and (2) distributions including
 * binaries display the following acknowledgement:  This product includes
 * software developed by the University of California, Berkeley and its
 * contributors'' in the documentation or other materials provided with the
 * distribution and in all advertising materials mentioning features or use
 * of this software.  Neither the name of the University nor the names of
 * its contributors may 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
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)tcpip.h     7.4 (Berkeley) 6/28/90
 */

/*
 * Tcp+ip header, after ip options removed.
 */
struct tcpiphdr {
        struct  ipovly ti_i;            /* overlaid ip structure */
        struct  tcphdr ti_t;            /* tcp header */
};
#define ti_next         ti_i.ih_next
#define ti_prev         ti_i.ih_prev
#define ti_x1           ti_i.ih_x1
#define ti_pr           ti_i.ih_pr
#define ti_len          ti_i.ih_len
#define ti_src          ti_i.ih_src
#define ti_dst          ti_i.ih_dst
#define ti_sport        ti_t.th_sport
#define ti_dport        ti_t.th_dport
#define ti_seq          ti_t.th_seq
#define ti_ack          ti_t.th_ack
#define ti_x2           ti_t.th_x2
#define ti_off          ti_t.th_off
#define ti_flags        ti_t.th_flags
#define ti_win          ti_t.th_win
#define ti_sum          ti_t.th_sum
#define ti_urp          ti_t.th_urp