blob: 701fd03a68075f9a2a532d50875c7fb9b3a5d56e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
/*
* Fundamental constants relating to TCP Protocol
*
* Copyright (C) 1999-2014, Broadcom Corporation
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2 (the "GPL"),
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
* following added to such license:
*
* As a special exception, the copyright holders of this software give you
* permission to link this software with independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
* the license of that module. An independent module is a module which is not
* derived from this software. The special exception does not apply to any
* modifications of the software.
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a license
* other than the GPL, without Broadcom's express prior written consent.
*
* $Id: bcmtcp.h 434656 2013-11-07 01:11:33Z $
*/
#ifndef _bcmtcp_h_
#define _bcmtcp_h_
#ifndef _TYPEDEFS_H_
#include <typedefs.h>
#endif
/* This marks the start of a packed structure section. */
#include <packed_section_start.h>
#define TCP_SRC_PORT_OFFSET 0 /* TCP source port offset */
#define TCP_DEST_PORT_OFFSET 2 /* TCP dest port offset */
#define TCP_SEQ_NUM_OFFSET 4 /* TCP sequence number offset */
#define TCP_ACK_NUM_OFFSET 8 /* TCP acknowledgement number offset */
#define TCP_HLEN_OFFSET 12 /* HLEN and reserved bits offset */
#define TCP_FLAGS_OFFSET 13 /* FLAGS and reserved bits offset */
#define TCP_CHKSUM_OFFSET 16 /* TCP body checksum offset */
#define TCP_PORT_LEN 2 /* TCP port field length */
/* 8bit TCP flag field */
#define TCP_FLAG_URG 0x20
#define TCP_FLAG_ACK 0x10
#define TCP_FLAG_PSH 0x08
#define TCP_FLAG_RST 0x04
#define TCP_FLAG_SYN 0x02
#define TCP_FLAG_FIN 0x01
#define TCP_HLEN_MASK 0xf000
#define TCP_HLEN_SHIFT 12
/* These fields are stored in network order */
BWL_PRE_PACKED_STRUCT struct bcmtcp_hdr
{
uint16 src_port; /* Source Port Address */
uint16 dst_port; /* Destination Port Address */
uint32 seq_num; /* TCP Sequence Number */
uint32 ack_num; /* TCP Sequence Number */
uint16 hdrlen_rsvd_flags; /* Header length, reserved bits and flags */
uint16 tcpwin; /* TCP window */
uint16 chksum; /* Segment checksum with pseudoheader */
uint16 urg_ptr; /* Points to seq-num of byte following urg data */
} BWL_POST_PACKED_STRUCT;
#define TCP_MIN_HEADER_LEN 20
#define TCP_HDRLEN_MASK 0xf0
#define TCP_HDRLEN_SHIFT 4
#define TCP_HDRLEN(hdrlen) (((hdrlen) & TCP_HDRLEN_MASK) >> TCP_HDRLEN_SHIFT)
#define TCP_FLAGS_MASK 0x1f
#define TCP_FLAGS(hdrlen) ((hdrlen) & TCP_FLAGS_MASK)
/* This marks the end of a packed structure section. */
#include <packed_section_end.h>
#endif /* #ifndef _bcmtcp_h_ */
|
