bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 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. |
aliguori | 2f5f899 | 2009-01-26 19:37:41 +0000 | [diff] [blame] | 13 | * 3. Neither the name of the University nor the names of its contributors |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 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 | |
Markus Armbruster | 2a6a407 | 2016-06-29 13:47:03 +0200 | [diff] [blame] | 33 | #ifndef TCPIP_H |
| 34 | #define TCPIP_H |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 35 | |
| 36 | /* |
| 37 | * Tcp+ip header, after ip options removed. |
| 38 | */ |
| 39 | struct tcpiphdr { |
Guillaume Subiron | 98c6305 | 2016-03-15 10:31:20 +0100 | [diff] [blame] | 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; |
Guillaume Subiron | 3feea44 | 2016-03-15 10:31:21 +0100 | [diff] [blame] | 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; |
Guillaume Subiron | 98c6305 | 2016-03-15 10:31:20 +0100 | [diff] [blame] | 54 | } ti; |
| 55 | uint16_t ti_x0; |
| 56 | uint16_t ti_len; /* protocol length */ |
| 57 | struct tcphdr ti_t; /* tcp header */ |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 58 | }; |
Guillaume Subiron | 98c6305 | 2016-03-15 10:31:20 +0100 | [diff] [blame] | 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 |
Guillaume Subiron | 3feea44 | 2016-03-15 10:31:21 +0100 | [diff] [blame] | 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 |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 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 | |
blueswir1 | 429d0a3 | 2009-01-13 19:48:42 +0000 | [diff] [blame] | 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 | |
Guillaume Subiron | 98c6305 | 2016-03-15 10:31:20 +0100 | [diff] [blame] | 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\ |
Yuval Shaia | 893dcdb | 2016-11-29 17:07:34 +0200 | [diff] [blame] | 88 | (MAX(0,\ |
Guillaume Subiron | 98c6305 | 2016-03-15 10:31:20 +0100 | [diff] [blame] | 89 | (sizeof(struct tcpiphdr)\ |
| 90 | - sizeof(struct ip) - sizeof(struct tcphdr) + 3) & ~3)) |
| 91 | |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 92 | /* |
| 93 | * Just a clean way to get to the first byte |
| 94 | * of the packet |
| 95 | */ |
| 96 | struct tcpiphdr_2 { |
| 97 | struct tcpiphdr dummy; |
| 98 | char first_char; |
| 99 | }; |
| 100 | |
| 101 | #endif |