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 mbuf_ptr ih_mbuf; /* backpointer to mbuf */ 41 union { 42 struct { 43 struct in_addr ih_src; /* source internet address */ 44 struct in_addr ih_dst; /* destination internet address */ 45 uint8_t ih_x1; /* (unused) */ 46 uint8_t ih_pr; /* protocol */ 47 } ti_i4; 48 struct { 49 struct in6_addr ih_src; 50 struct in6_addr ih_dst; 51 uint8_t ih_x1; 52 uint8_t ih_nh; 53 } ti_i6; 54 } ti; 55 uint16_t ti_x0; 56 uint16_t ti_len; /* protocol length */ 57 struct tcphdr ti_t; /* tcp header */ 58}; 59#define ti_mbuf ih_mbuf.mptr 60#define ti_pr ti.ti_i4.ih_pr 61#define ti_src ti.ti_i4.ih_src 62#define ti_dst ti.ti_i4.ih_dst 63#define ti_src6 ti.ti_i6.ih_src 64#define ti_dst6 ti.ti_i6.ih_dst 65#define ti_nh6 ti.ti_i6.ih_nh 66#define ti_sport ti_t.th_sport 67#define ti_dport ti_t.th_dport 68#define ti_seq ti_t.th_seq 69#define ti_ack ti_t.th_ack 70#define ti_x2 ti_t.th_x2 71#define ti_off ti_t.th_off 72#define ti_flags ti_t.th_flags 73#define ti_win ti_t.th_win 74#define ti_sum ti_t.th_sum 75#define ti_urp ti_t.th_urp 76 77#define tcpiphdr2qlink(T) ((struct qlink*)(((char*)(T)) - sizeof(struct qlink))) 78#define qlink2tcpiphdr(Q) ((struct tcpiphdr*)(((char*)(Q)) + sizeof(struct qlink))) 79#define tcpiphdr_next(T) qlink2tcpiphdr(tcpiphdr2qlink(T)->next) 80#define tcpiphdr_prev(T) qlink2tcpiphdr(tcpiphdr2qlink(T)->prev) 81#define tcpfrag_list_first(T) qlink2tcpiphdr((T)->seg_next) 82#define tcpfrag_list_end(F, T) (tcpiphdr2qlink(F) == (struct qlink*)(T)) 83#define tcpfrag_list_empty(T) ((T)->seg_next == (struct tcpiphdr*)(T)) 84 85/* This is the difference between the size of a tcpiphdr structure, and the 86 * size of actual ip+tcp headers, rounded up since we need to align data. */ 87#define TCPIPHDR_DELTA\ 88 (max(0,\ 89 (sizeof(struct tcpiphdr)\ 90 - sizeof(struct ip) - sizeof(struct tcphdr) + 3) & ~3)) 91 92/* 93 * Just a clean way to get to the first byte 94 * of the packet 95 */ 96struct tcpiphdr_2 { 97 struct tcpiphdr dummy; 98 char first_char; 99}; 100 101#endif 102