1/*
2 * Copyright (c) 1982, 1986, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)tcpip.h	8.1 (Berkeley) 6/10/93
30 * tcpip.h,v 1.3 1994/08/21 05:27:40 paul Exp
31 */
32
33#ifndef _TCPIP_H_
34#define _TCPIP_H_
35
36/*
37 * Tcp+ip header, after ip options removed.
38 */
39struct tcpiphdr {
40	struct 	ipovly ti_i;		/* overlaid ip structure */
41	struct	tcphdr ti_t;		/* tcp header */
42};
43#define	ti_mbuf		ti_i.ih_mbuf.mptr
44#define	ti_x1		ti_i.ih_x1
45#define	ti_pr		ti_i.ih_pr
46#define	ti_len		ti_i.ih_len
47#define	ti_src		ti_i.ih_src
48#define	ti_dst		ti_i.ih_dst
49#define	ti_sport	ti_t.th_sport
50#define	ti_dport	ti_t.th_dport
51#define	ti_seq		ti_t.th_seq
52#define	ti_ack		ti_t.th_ack
53#define	ti_x2		ti_t.th_x2
54#define	ti_off		ti_t.th_off
55#define	ti_flags	ti_t.th_flags
56#define	ti_win		ti_t.th_win
57#define	ti_sum		ti_t.th_sum
58#define	ti_urp		ti_t.th_urp
59
60#define tcpiphdr2qlink(T) ((struct qlink*)(((char*)(T)) - sizeof(struct qlink)))
61#define qlink2tcpiphdr(Q) ((struct tcpiphdr*)(((char*)(Q)) + sizeof(struct qlink)))
62#define tcpiphdr_next(T) qlink2tcpiphdr(tcpiphdr2qlink(T)->next)
63#define tcpiphdr_prev(T) qlink2tcpiphdr(tcpiphdr2qlink(T)->prev)
64#define tcpfrag_list_first(T) qlink2tcpiphdr((T)->seg_next)
65#define tcpfrag_list_end(F, T) (tcpiphdr2qlink(F) == (struct qlink*)(T))
66#define tcpfrag_list_empty(T) ((T)->seg_next == (struct tcpiphdr*)(T))
67
68/*
69 * Just a clean way to get to the first byte
70 * of the packet
71 */
72struct tcpiphdr_2 {
73	struct tcpiphdr dummy;
74	char first_char;
75};
76
77#endif
78