1 | /* SPDX-License-Identifier: BSD-3-Clause */ |
2 | /* |
3 | * Copyright (c) 1982, 1986, 1993 |
4 | * The Regents of the University of California. All rights reserved. |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
9 | * 1. Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * 2. Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
14 | * 3. Neither the name of the University nor the names of its contributors |
15 | * may be used to endorse or promote products derived from this software |
16 | * without specific prior written permission. |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
28 | * SUCH DAMAGE. |
29 | * |
30 | * @(#)tcpip.h 8.1 (Berkeley) 6/10/93 |
31 | * tcpip.h,v 1.3 1994/08/21 05:27:40 paul Exp |
32 | */ |
33 | |
34 | #ifndef TCPIP_H |
35 | #define TCPIP_H |
36 | |
37 | /* |
38 | * Tcp+ip header, after ip options removed. |
39 | */ |
40 | struct tcpiphdr { |
41 | struct mbuf_ptr ih_mbuf; /* backpointer to mbuf */ |
42 | union { |
43 | struct { |
44 | struct in_addr ih_src; /* source internet address */ |
45 | struct in_addr ih_dst; /* destination internet address */ |
46 | uint8_t ih_x1; /* (unused) */ |
47 | uint8_t ih_pr; /* protocol */ |
48 | } ti_i4; |
49 | struct { |
50 | struct in6_addr ih_src; |
51 | struct in6_addr ih_dst; |
52 | uint8_t ih_x1; |
53 | uint8_t ih_nh; |
54 | } ti_i6; |
55 | } ti; |
56 | uint16_t ti_x0; |
57 | uint16_t ti_len; /* protocol length */ |
58 | struct tcphdr ti_t; /* tcp header */ |
59 | }; |
60 | #define ti_mbuf ih_mbuf.mptr |
61 | #define ti_pr ti.ti_i4.ih_pr |
62 | #define ti_src ti.ti_i4.ih_src |
63 | #define ti_dst ti.ti_i4.ih_dst |
64 | #define ti_src6 ti.ti_i6.ih_src |
65 | #define ti_dst6 ti.ti_i6.ih_dst |
66 | #define ti_nh6 ti.ti_i6.ih_nh |
67 | #define ti_sport ti_t.th_sport |
68 | #define ti_dport ti_t.th_dport |
69 | #define ti_seq ti_t.th_seq |
70 | #define ti_ack ti_t.th_ack |
71 | #define ti_x2 ti_t.th_x2 |
72 | #define ti_off ti_t.th_off |
73 | #define ti_flags ti_t.th_flags |
74 | #define ti_win ti_t.th_win |
75 | #define ti_sum ti_t.th_sum |
76 | #define ti_urp ti_t.th_urp |
77 | |
78 | #define tcpiphdr2qlink(T) \ |
79 | ((struct qlink *)(((char *)(T)) - sizeof(struct qlink))) |
80 | #define qlink2tcpiphdr(Q) \ |
81 | ((struct tcpiphdr *)(((char *)(Q)) + sizeof(struct qlink))) |
82 | #define tcpiphdr_next(T) qlink2tcpiphdr(tcpiphdr2qlink(T)->next) |
83 | #define tcpiphdr_prev(T) qlink2tcpiphdr(tcpiphdr2qlink(T)->prev) |
84 | #define tcpfrag_list_first(T) qlink2tcpiphdr((T)->seg_next) |
85 | #define tcpfrag_list_end(F, T) (tcpiphdr2qlink(F) == (struct qlink *)(T)) |
86 | #define tcpfrag_list_empty(T) ((T)->seg_next == (struct tcpiphdr *)(T)) |
87 | |
88 | /* This is the difference between the size of a tcpiphdr structure, and the |
89 | * size of actual ip+tcp headers, rounded up since we need to align data. */ |
90 | #define TCPIPHDR_DELTA \ |
91 | (MAX(0, (sizeof(struct tcpiphdr) - sizeof(struct ip) - \ |
92 | sizeof(struct tcphdr) + 3) & \ |
93 | ~3)) |
94 | |
95 | /* |
96 | * Just a clean way to get to the first byte |
97 | * of the packet |
98 | */ |
99 | struct tcpiphdr_2 { |
100 | struct tcpiphdr dummy; |
101 | char first_char; |
102 | }; |
103 | |
104 | #endif |
105 | |