1#ifndef _LINUX_ICMPV6_H
2#define _LINUX_ICMPV6_H
3
4#include <linux/types.h>
5#include <asm/byteorder.h>
6
7struct icmp6hdr {
8
9	__u8		icmp6_type;
10	__u8		icmp6_code;
11	__sum16		icmp6_cksum;
12
13
14	union {
15		__be32			un_data32[1];
16		__be16			un_data16[2];
17		__u8			un_data8[4];
18
19		struct icmpv6_echo {
20			__be16		identifier;
21			__be16		sequence;
22		} u_echo;
23
24                struct icmpv6_nd_advt {
25#if defined(__LITTLE_ENDIAN_BITFIELD)
26                        __u32		reserved:5,
27                        		override:1,
28                        		solicited:1,
29                        		router:1,
30					reserved2:24;
31#elif defined(__BIG_ENDIAN_BITFIELD)
32                        __u32		router:1,
33					solicited:1,
34                        		override:1,
35                        		reserved:29;
36#else
37#error	"Please fix <asm/byteorder.h>"
38#endif
39                } u_nd_advt;
40
41                struct icmpv6_nd_ra {
42			__u8		hop_limit;
43#if defined(__LITTLE_ENDIAN_BITFIELD)
44			__u8		reserved:3,
45					router_pref:2,
46					home_agent:1,
47					other:1,
48					managed:1;
49
50#elif defined(__BIG_ENDIAN_BITFIELD)
51			__u8		managed:1,
52					other:1,
53					home_agent:1,
54					router_pref:2,
55					reserved:3;
56#else
57#error	"Please fix <asm/byteorder.h>"
58#endif
59			__be16		rt_lifetime;
60                } u_nd_ra;
61
62	} icmp6_dataun;
63
64#define icmp6_identifier	icmp6_dataun.u_echo.identifier
65#define icmp6_sequence		icmp6_dataun.u_echo.sequence
66#define icmp6_pointer		icmp6_dataun.un_data32[0]
67#define icmp6_mtu		icmp6_dataun.un_data32[0]
68#define icmp6_unused		icmp6_dataun.un_data32[0]
69#define icmp6_maxdelay		icmp6_dataun.un_data16[0]
70#define icmp6_router		icmp6_dataun.u_nd_advt.router
71#define icmp6_solicited		icmp6_dataun.u_nd_advt.solicited
72#define icmp6_override		icmp6_dataun.u_nd_advt.override
73#define icmp6_ndiscreserved	icmp6_dataun.u_nd_advt.reserved
74#define icmp6_hop_limit		icmp6_dataun.u_nd_ra.hop_limit
75#define icmp6_addrconf_managed	icmp6_dataun.u_nd_ra.managed
76#define icmp6_addrconf_other	icmp6_dataun.u_nd_ra.other
77#define icmp6_rt_lifetime	icmp6_dataun.u_nd_ra.rt_lifetime
78#define icmp6_router_pref	icmp6_dataun.u_nd_ra.router_pref
79};
80
81#ifdef __KERNEL__
82#include <linux/skbuff.h>
83
84static inline struct icmp6hdr *icmp6_hdr(const struct sk_buff *skb)
85{
86	return (struct icmp6hdr *)skb_transport_header(skb);
87}
88#endif
89
90#define ICMPV6_ROUTER_PREF_LOW		0x3
91#define ICMPV6_ROUTER_PREF_MEDIUM	0x0
92#define ICMPV6_ROUTER_PREF_HIGH		0x1
93#define ICMPV6_ROUTER_PREF_INVALID	0x2
94
95#define ICMPV6_DEST_UNREACH		1
96#define ICMPV6_PKT_TOOBIG		2
97#define ICMPV6_TIME_EXCEED		3
98#define ICMPV6_PARAMPROB		4
99
100#define ICMPV6_INFOMSG_MASK		0x80
101
102#define ICMPV6_ECHO_REQUEST		128
103#define ICMPV6_ECHO_REPLY		129
104#define ICMPV6_MGM_QUERY		130
105#define ICMPV6_MGM_REPORT       	131
106#define ICMPV6_MGM_REDUCTION    	132
107
108#define ICMPV6_NI_QUERY			139
109#define ICMPV6_NI_REPLY			140
110
111#define ICMPV6_MLD2_REPORT		143
112
113#define ICMPV6_DHAAD_REQUEST		144
114#define ICMPV6_DHAAD_REPLY		145
115#define ICMPV6_MOBILE_PREFIX_SOL	146
116#define ICMPV6_MOBILE_PREFIX_ADV	147
117
118/*
119 *	Codes for Destination Unreachable
120 */
121#define ICMPV6_NOROUTE			0
122#define ICMPV6_ADM_PROHIBITED		1
123#define ICMPV6_NOT_NEIGHBOUR		2
124#define ICMPV6_ADDR_UNREACH		3
125#define ICMPV6_PORT_UNREACH		4
126
127/*
128 *	Codes for Time Exceeded
129 */
130#define ICMPV6_EXC_HOPLIMIT		0
131#define ICMPV6_EXC_FRAGTIME		1
132
133/*
134 *	Codes for Parameter Problem
135 */
136#define ICMPV6_HDR_FIELD		0
137#define ICMPV6_UNK_NEXTHDR		1
138#define ICMPV6_UNK_OPTION		2
139
140/*
141 *	constants for (set|get)sockopt
142 */
143
144#define ICMPV6_FILTER			1
145
146/*
147 *	ICMPV6 filter
148 */
149
150#define ICMPV6_FILTER_BLOCK		1
151#define ICMPV6_FILTER_PASS		2
152#define ICMPV6_FILTER_BLOCKOTHERS	3
153#define ICMPV6_FILTER_PASSONLY		4
154
155struct icmp6_filter {
156	__u32		data[8];
157};
158
159/*
160 *	Definitions for MLDv2
161 */
162#define MLD2_MODE_IS_INCLUDE	1
163#define MLD2_MODE_IS_EXCLUDE	2
164#define MLD2_CHANGE_TO_INCLUDE	3
165#define MLD2_CHANGE_TO_EXCLUDE	4
166#define MLD2_ALLOW_NEW_SOURCES	5
167#define MLD2_BLOCK_OLD_SOURCES	6
168
169#define MLD2_ALL_MCR_INIT { { { 0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x16 } } }
170
171#ifdef __KERNEL__
172
173#include <linux/netdevice.h>
174
175extern void				icmpv6_send(struct sk_buff *skb,
176						    u8 type, u8 code,
177						    __u32 info);
178
179extern int				icmpv6_init(void);
180extern int				icmpv6_err_convert(u8 type, u8 code,
181							   int *err);
182extern void				icmpv6_cleanup(void);
183extern void				icmpv6_param_prob(struct sk_buff *skb,
184							  u8 code, int pos);
185
186struct flowi;
187struct in6_addr;
188extern void				icmpv6_flow_init(struct sock *sk,
189							 struct flowi *fl,
190							 u8 type,
191							 const struct in6_addr *saddr,
192							 const struct in6_addr *daddr,
193							 int oif);
194#endif
195
196#endif
197