summaryrefslogtreecommitdiff
path: root/package/broadcom-wl/src/driver/proto/bcmip.h
blob: 4169060da306e60e2ac21b6b11a109c3adfd9e7d (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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/*
 * Copyright 2007, Broadcom Corporation
 * All Rights Reserved.
 * 
 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
 *
 * Fundamental constants relating to IP Protocol
 *
 * $Id$
 */

#ifndef _bcmip_h_
#define _bcmip_h_

/* enable structure packing */
#if defined(__GNUC__)
#define	PACKED	__attribute__((packed))
#else
#pragma pack(1)
#define	PACKED
#endif


/* IPV4 and IPV6 common */
#define IP_VER_OFFSET		0x0	/* offset to version field */
#define IP_VER_MASK		0xf0	/* version mask */
#define IP_VER_SHIFT		4	/* version shift */
#define IP_VER_4		4	/* version number for IPV4 */
#define IP_VER_6		6	/* version number for IPV6 */

#define IP_VER(ip_body) \
	((((uint8 *)(ip_body))[IP_VER_OFFSET] & IP_VER_MASK) >> IP_VER_SHIFT)

#define IP_PROT_ICMP		0x1	/* ICMP protocol */
#define IP_PROT_TCP		0x6	/* TCP protocol */
#define IP_PROT_UDP		0x11	/* UDP protocol type */

/* IPV4 field offsets */
#define IPV4_VER_HL_OFFSET	0	/* version and ihl byte offset */
#define IPV4_TOS_OFFSET		1	/* type of service offset */
#define IPV4_PKTLEN_OFFSET	2	/* packet length offset */
#define IPV4_PKTFLAG_OFFSET	6	/* more-frag,dont-frag flag offset */
#define IPV4_PROT_OFFSET	9	/* protocol type offset */
#define IPV4_CHKSUM_OFFSET	10	/* IP header checksum offset */
#define IPV4_SRC_IP_OFFSET	12	/* src IP addr offset */
#define IPV4_DEST_IP_OFFSET	16	/* dest IP addr offset */
#define IPV4_OPTIONS_OFFSET	20	/* IP options offset */

/* IPV4 field decodes */
#define IPV4_VER_MASK		0xf0	/* IPV4 version mask */
#define IPV4_VER_SHIFT		4	/* IPV4 version shift */

#define IPV4_HLEN_MASK		0x0f	/* IPV4 header length mask */
#define IPV4_HLEN(ipv4_body)	(4 * (((uint8 *)(ipv4_body))[IPV4_VER_HL_OFFSET] & IPV4_HLEN_MASK))

#define IPV4_ADDR_LEN		4	/* IPV4 address length */

#define IPV4_ADDR_NULL(a)	((((uint8 *)(a))[0] | ((uint8 *)(a))[1] | \
				  ((uint8 *)(a))[2] | ((uint8 *)(a))[3]) == 0)

#define IPV4_ADDR_BCAST(a)	((((uint8 *)(a))[0] & ((uint8 *)(a))[1] & \
				  ((uint8 *)(a))[2] & ((uint8 *)(a))[3]) == 0xff)

#define	IPV4_TOS_DSCP_MASK	0xfc	/* DiffServ codepoint mask */
#define	IPV4_TOS_DSCP_SHIFT	2	/* DiffServ codepoint shift */

#define	IPV4_TOS(ipv4_body)	(((uint8 *)(ipv4_body))[IPV4_TOS_OFFSET])

#define	IPV4_TOS_PREC_MASK	0xe0	/* Historical precedence mask */
#define	IPV4_TOS_PREC_SHIFT	5	/* Historical precedence shift */

#define IPV4_TOS_LOWDELAY	0x10	/* Lowest delay requested */
#define IPV4_TOS_THROUGHPUT	0x8	/* Best throughput requested */
#define IPV4_TOS_RELIABILITY	0x4	/* Most reliable delivery requested */

#define IPV4_PROT(ipv4_body)	(((uint8 *)(ipv4_body))[IPV4_PROT_OFFSET])

#define IPV4_FRAG_RESV		0x8000	/* Reserved */
#define IPV4_FRAG_DONT		0x4000	/* Don't fragment */
#define IPV4_FRAG_MORE		0x2000	/* More fragments */
#define IPV4_FRAG_OFFSET_MASK	0x1fff	/* Fragment offset */

#define IPV4_ADDR_STR_LEN	16	/* Max IP address length in string format */

/* IPv4, no options only.  */
#define IPV4_NO_OPTIONS_HDR_LEN 20
#define IPV4_NO_OPTIONS_PAYLOAD(ip_hdr)    (&(((uint8 *)(ip_hdr))[IPV4_NO_OPTIONS_HDR_LEN]))

#define IPV4_PAYLOAD_LEN(ip_body) \
	(((int)(((uint8 *)(ip_body))[IPV4_PKTLEN_OFFSET + 0]) << 8) | \
	 ((uint8 *)(ip_body))[IPV4_PKTLEN_OFFSET + 1])

/* IPV4 packet formats */
struct ipv4_addr {
	uint8	addr[IPV4_ADDR_LEN];
} PACKED;

struct ipv4_hdr {
	uint8	version_ihl;		/* Version and Internet Header Length */
	uint8	tos;			/* Type Of Service */
	uint16	tot_len;		/* Number of bytes in packet (max 65535) */
	uint16	id;
	uint16	frag;			/* 3 flag bits and fragment offset */
	uint8	ttl;			/* Time To Live */
	uint8	prot;			/* Protocol */
	uint16	hdr_chksum;		/* IP header checksum */
	uint8	src_ip[IPV4_ADDR_LEN];	/* Source IP Address */
	uint8	dst_ip[IPV4_ADDR_LEN];	/* Destination IP Address */
} PACKED;

/* IPV6 field offsets */
#define IPV6_PAYLOAD_LEN_OFFSET	4	/* payload length offset */
#define IPV6_NEXT_HDR_OFFSET	6	/* next header/protocol offset */
#define IPV6_HOP_LIMIT_OFFSET	7	/* hop limit offset */
#define IPV6_SRC_IP_OFFSET	8	/* src IP addr offset */
#define IPV6_DEST_IP_OFFSET	24	/* dst IP addr offset */

/* IPV6 field decodes */
#define IPV6_TRAFFIC_CLASS(ipv6_body) \
	(((((uint8 *)(ipv6_body))[0] & 0x0f) << 4) | \
	 ((((uint8 *)(ipv6_body))[1] & 0xf0) >> 4))

#define IPV6_FLOW_LABEL(ipv6_body) \
	(((((uint8 *)(ipv6_body))[1] & 0x0f) << 16) | \
	 (((uint8 *)(ipv6_body))[2] << 8) | \
	 (((uint8 *)(ipv6_body))[3]))

#define IPV6_PAYLOAD_LEN(ipv6_body) \
	((((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 0] << 8) | \
	 ((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 1])

#define IPV6_NEXT_HDR(ipv6_body) \
	(((uint8 *)(ipv6_body))[IPV6_NEXT_HDR_OFFSET])

#define IPV6_PROT(ipv6_body)	IPV6_NEXT_HDR(ipv6_body)

#define IPV6_ADDR_LEN		16	/* IPV6 address length */

/* IPV4 TOS or IPV6 Traffic Classifier or 0 */
#define IP_TOS(ip_body) \
	(IP_VER(ip_body) == IP_VER_4 ? IPV4_TOS(ip_body) : \
	 IP_VER(ip_body) == IP_VER_6 ? IPV6_TRAFFIC_CLASS(ip_body) : 0)

#undef PACKED
#if !defined(__GNUC__)
#pragma pack()
#endif

#endif	/* _bcmip_h_ */