icmp6.h

/* -*- c-basic-offset: 4 -*- */
#ifndef CLICKNET_ICMP6_H
#define CLICKNET_ICMP6_H
#include <clicknet/ip6.h>
 
/*
 * <clicknet/icmp6.h> -- our own definitions for ICMP6 packets
 * Based on RFC 1885
 */
 
/* types for ICMP6 packets */
#define ICMP6_UNREACH           1
#define ICMP6_PKTTOOBIG         2
#define ICMP6_TIMXCEED          3
#define ICMP6_PARAMPROB         4
 
#define ICMP6_ECHO              128
#define ICMP6_ECHOREPLY         129
#define ICMP6_MEMBERSHIPQUERY   130
#define ICMP6_MEMBERSHIPREPORT  131
#define ICMP6_MEMBERSHIPREDUCTION 132
 
#define ICMP6_REDIRECT          137
 
/* codes for spefic types of ICMP6 packets */
/* ICMP6 Error Message - Type: 1 */
#define ICMP6_UNREACH_NOROUTE   0
#define ICMP6_UNREACH_ADMIN     1
#define ICMP6_UNREACH_NOTNEIGHBOR 2
#define ICMP6_UNREACH_ADDR      3
#define ICMP6_UNREACH_NOPORT    4
 
/* ICMP6 Time Exceeded Message - Type: 3 */
#define ICMP6_TIMXCEED_TRANSIT  0
#define ICMP6_TIMXCEED_REASSEMBLY 1
 
/* ICMP6 Parameter Problem Message - Type: 4 */
#define ICMP6_PARAMPROB_HEADER  0
#define ICMP6_PARAMPROB_NEXTHEADER 1
#define ICMP6_PARAMPROB_OPTION  2
 
/* remove possible definitions for symbols */
#undef icmp6_identifier
#undef icmp6_sequence
#undef icmp6_pointer
#undef icmp6_maxdelay
 
 
/* most ICMP6 request types */
struct click_icmp6 {
    uint8_t icmp6_type;         /* one of the ICMP6_TYPE_*'s above */
    uint8_t icmp6_code;         /* one of the ICMP6_CODE_*'s above */
    uint16_t icmp6_cksum;               /* 16 1's comp csum */
    uint32_t padding;                   /* should be zero */
    /* followed by as much of invoking packet as will fit without the ICMPv6 packet exceeding 576 octets*/
};
 
/* packet too big header */
struct click_icmp6_pkttoobig {
    uint8_t icmp6_type;         /* one of the ICMP6_TYPE_*'s above */
    uint8_t icmp6_code;         /* one of the ICMP6_CODE_*'s above */
    uint16_t icmp6_cksum;               /* 16 1's comp csum */
    uint32_t icmp6_mtusize;                     /* maximum packet size */
  /* followed by as much of invoking packet as will fit without the ICMPv6 packet exceeding 576 octets*/
};
 
/* parameter problem header */
struct click_icmp6_paramprob {
    uint8_t icmp6_type;         /* one of the ICMP_TYPE_*'s above */
    uint8_t icmp6_code;         /* one of the ICMP6_CODE_*'s above */
    uint16_t icmp6_cksum;               /* 16 1's comp csum */
    uint32_t icmp6_pointer;             /* which octect in orig. IP6 pkt was a problem */
  /* followed by as much of invoking packet as will fit without the ICMPv6 packet exceeding 576 octets*/
};
 
 
/* struct for things with sequence numbers - echo request & echo reply msgs*/
struct click_icmp6_sequenced {
    uint8_t icmp6_type;         /* one of the ICMP6_TYPE_*'s above */
    uint8_t icmp6_code;         /* one of the ICMP6_CODE_*'s above */
    uint16_t icmp6_cksum;               /* 16 1's comp csum */
    uint16_t icmp6_identifier;
    uint16_t icmp6_sequence;
    /* Followed by: */
    /* Echo Request: zero or more octets of arbitary data */
    /* Echo Reply: the data fromm the invoking Echo Request msg */
};
 
/* struct for group membership messages */
struct click_icmp6_membership {
    uint8_t icmp6_type;         /* one of the ICMP6_TYPE_*'s above */
    uint8_t icmp6_code;         /* one of the ICMP6_CODE_*'s above */
    uint16_t icmp6_cksum;               /* 16 1's comp csum */
    uint16_t icmp6_maxdelay;   /* maximum response delay, in milliseconds */
    uint16_t padding;
    /* followed by multicast address */
};
 
/* struct for redirect messages */
struct click_icmp6_redirect {
    uint8_t icmp6_type;
    uint8_t icmp6_code;
    uint16_t icmp6_cksum;
    uint32_t padding;
    struct in6_addr icmp6_target;
    struct in6_addr icmp6_dst;
};
 
/* different struct names for each type of packet */
#define click_icmp6_unreach     click_icmp6
#define click_icmp6_timxceed    click_icmp6
#define click_icmp6_echo        click_icmp6_sequenced
 
#endif