slirp/tcpip.h

   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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)tcpip.h     8.1 (Berkeley) 6/10/93
  34  * tcpip.h,v 1.3 1994/08/21 05:27:40 paul Exp
  35  */
  36
  37 #ifndef _TCPIP_H_
  38 #define _TCPIP_H_
  39
  40 /*
  41  * Tcp+ip header, after ip options removed.
  42  */
  43 struct tcpiphdr {
  44         struct  ipovly ti_i;            /* overlaid ip structure */
  45         struct  tcphdr ti_t;            /* tcp header */
  46 };
  47 #define ti_mbuf         ti_i.ih_mbuf.mptr
  48 #define ti_x1           ti_i.ih_x1
  49 #define ti_pr           ti_i.ih_pr
  50 #define ti_len          ti_i.ih_len
  51 #define ti_src          ti_i.ih_src
  52 #define ti_dst          ti_i.ih_dst
  53 #define ti_sport        ti_t.th_sport
  54 #define ti_dport        ti_t.th_dport
  55 #define ti_seq          ti_t.th_seq
  56 #define ti_ack          ti_t.th_ack
  57 #define ti_x2           ti_t.th_x2
  58 #define ti_off          ti_t.th_off
  59 #define ti_flags        ti_t.th_flags
  60 #define ti_win          ti_t.th_win
  61 #define ti_sum          ti_t.th_sum
  62 #define ti_urp          ti_t.th_urp
  63
  64 #define tcpiphdr2qlink(T) ((struct qlink*)(((char*)(T)) - sizeof(struct qlink)))
  65 #define qlink2tcpiphdr(Q) ((struct tcpiphdr*)(((char*)(Q)) + sizeof(struct qlink)))
  66 #define tcpiphdr_next(T) qlink2tcpiphdr(tcpiphdr2qlink(T)->next)
  67 #define tcpiphdr_prev(T) qlink2tcpiphdr(tcpiphdr2qlink(T)->prev)
  68 #define tcpfrag_list_first(T) qlink2tcpiphdr((T)->seg_next)
  69 #define tcpfrag_list_end(F, T) (tcpiphdr2qlink(F) == (struct qlink*)(T))
  70 #define tcpfrag_list_empty(T) ((T)->seg_next == (struct tcpiphdr*)(T))
  71
  72 /*
  73  * Just a clean way to get to the first byte
  74  * of the packet
  75  */
  76 struct tcpiphdr_2 {
  77         struct tcpiphdr dummy;
  78         char first_char;
  79 };
  80
  81 #endif