root/include/linux/icmpv6.h

INCLUDED FROM

DEFINITIONS

1. icmp6_hdr

#ifndef _LINUX_ICMPV6_H
#define _LINUX_ICMPV6_H

#include <asm/byteorder.h>

struct icmp6hdr {

        __u8            icmp6_type;
        __u8            icmp6_code;
        __sum16         icmp6_cksum;


        union {
                __be32                  un_data32[1];
                __be16                  un_data16[2];
                __u8                    un_data8[4];

                struct icmpv6_echo {
                        __be16          identifier;
                        __be16          sequence;
                } u_echo;

                struct icmpv6_nd_advt {
#if defined(__LITTLE_ENDIAN_BITFIELD)
                        __u32           reserved:5,
                                        override:1,
                                        solicited:1,
                                        router:1,
                                        reserved2:24;
#elif defined(__BIG_ENDIAN_BITFIELD)
                        __u32           router:1,
                                        solicited:1,
                                        override:1,
                                        reserved:29;
#else
#error  "Please fix <asm/byteorder.h>"
#endif                                          
                } u_nd_advt;

                struct icmpv6_nd_ra {
                        __u8            hop_limit;
#if defined(__LITTLE_ENDIAN_BITFIELD)
                        __u8            reserved:4,
                                        router_pref:2,
                                        other:1,
                                        managed:1;

#elif defined(__BIG_ENDIAN_BITFIELD)
                        __u8            managed:1,
                                        other:1,
                                        router_pref:2,
                                        reserved:4;
#else
#error  "Please fix <asm/byteorder.h>"
#endif
                        __be16          rt_lifetime;
                } u_nd_ra;

        } icmp6_dataun;

#define icmp6_identifier        icmp6_dataun.u_echo.identifier
#define icmp6_sequence          icmp6_dataun.u_echo.sequence
#define icmp6_pointer           icmp6_dataun.un_data32[0]
#define icmp6_mtu               icmp6_dataun.un_data32[0]
#define icmp6_unused            icmp6_dataun.un_data32[0]
#define icmp6_maxdelay          icmp6_dataun.un_data16[0]
#define icmp6_router            icmp6_dataun.u_nd_advt.router
#define icmp6_solicited         icmp6_dataun.u_nd_advt.solicited
#define icmp6_override          icmp6_dataun.u_nd_advt.override
#define icmp6_ndiscreserved     icmp6_dataun.u_nd_advt.reserved
#define icmp6_hop_limit         icmp6_dataun.u_nd_ra.hop_limit
#define icmp6_addrconf_managed  icmp6_dataun.u_nd_ra.managed
#define icmp6_addrconf_other    icmp6_dataun.u_nd_ra.other
#define icmp6_rt_lifetime       icmp6_dataun.u_nd_ra.rt_lifetime
#define icmp6_router_pref       icmp6_dataun.u_nd_ra.router_pref
};

#ifdef __KERNEL__
#include <linux/skbuff.h>

static inline struct icmp6hdr *icmp6_hdr(const struct sk_buff *skb)
{
        return (struct icmp6hdr *)skb_transport_header(skb);
}
#endif

#define ICMPV6_ROUTER_PREF_LOW          0x3
#define ICMPV6_ROUTER_PREF_MEDIUM       0x0
#define ICMPV6_ROUTER_PREF_HIGH         0x1
#define ICMPV6_ROUTER_PREF_INVALID      0x2

#define ICMPV6_DEST_UNREACH             1
#define ICMPV6_PKT_TOOBIG               2
#define ICMPV6_TIME_EXCEED              3
#define ICMPV6_PARAMPROB                4

#define ICMPV6_INFOMSG_MASK             0x80

#define ICMPV6_ECHO_REQUEST             128
#define ICMPV6_ECHO_REPLY               129
#define ICMPV6_MGM_QUERY                130
#define ICMPV6_MGM_REPORT               131
#define ICMPV6_MGM_REDUCTION            132

#define ICMPV6_NI_QUERY                 139
#define ICMPV6_NI_REPLY                 140

#define ICMPV6_MLD2_REPORT              143

#define ICMPV6_DHAAD_REQUEST            144
#define ICMPV6_DHAAD_REPLY              145
#define ICMPV6_MOBILE_PREFIX_SOL        146
#define ICMPV6_MOBILE_PREFIX_ADV        147

/*
 *      Codes for Destination Unreachable
 */
#define ICMPV6_NOROUTE                  0
#define ICMPV6_ADM_PROHIBITED           1
#define ICMPV6_NOT_NEIGHBOUR            2
#define ICMPV6_ADDR_UNREACH             3
#define ICMPV6_PORT_UNREACH             4

/*
 *      Codes for Time Exceeded
 */
#define ICMPV6_EXC_HOPLIMIT             0
#define ICMPV6_EXC_FRAGTIME             1

/*
 *      Codes for Parameter Problem
 */
#define ICMPV6_HDR_FIELD                0
#define ICMPV6_UNK_NEXTHDR              1
#define ICMPV6_UNK_OPTION               2

/*
 *      constants for (set|get)sockopt
 */

#define ICMPV6_FILTER                   1

/*
 *      ICMPV6 filter
 */

#define ICMPV6_FILTER_BLOCK             1
#define ICMPV6_FILTER_PASS              2
#define ICMPV6_FILTER_BLOCKOTHERS       3
#define ICMPV6_FILTER_PASSONLY          4

struct icmp6_filter {
        __u32           data[8];
};

/*
 *      Definitions for MLDv2
 */
#define MLD2_MODE_IS_INCLUDE    1
#define MLD2_MODE_IS_EXCLUDE    2
#define MLD2_CHANGE_TO_INCLUDE  3
#define MLD2_CHANGE_TO_EXCLUDE  4
#define MLD2_ALLOW_NEW_SOURCES  5
#define MLD2_BLOCK_OLD_SOURCES  6

#define MLD2_ALL_MCR_INIT { { { 0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x16 } } }

#ifdef __KERNEL__

#include <linux/netdevice.h>
#include <linux/skbuff.h>


extern void                             icmpv6_send(struct sk_buff *skb,
                                                    int type, int code,
                                                    __u32 info, 
                                                    struct net_device *dev);

extern int                              icmpv6_init(void);
extern int                              icmpv6_err_convert(int type, int code,
                                                           int *err);
extern void                             icmpv6_cleanup(void);
extern void                             icmpv6_param_prob(struct sk_buff *skb,
                                                          int code, int pos);

struct flowi;
struct in6_addr;
extern void                             icmpv6_flow_init(struct sock *sk,
                                                         struct flowi *fl,
                                                         u8 type,
                                                         const struct in6_addr *saddr,
                                                         const struct in6_addr *daddr,
                                                         int oif);
#endif

#endif