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/*
* icmpv6.h
*
* ICMPv6.
* RFC 4443
*
* $Id: $
*/
#ifndef DNET_ICMPV6_H
#define DNET_ICMPV6_H
#define ICMPV6_HDR_LEN 4 /* base ICMPv6 header length */
#ifndef __GNUC__
#ifndef __attribute__
# define __attribute__(x)
#endif
# pragma pack(1)
#endif
/*
* ICMPv6 header
*/
struct icmpv6_hdr {
uint8_t icmpv6_type; /* type of message, see below */
uint8_t icmpv6_code; /* type sub code */
uint16_t icmpv6_cksum; /* ones complement cksum of struct */
};
/*
* Types (icmpv6_type) and codes (icmpv6_code) -
* http://www.iana.org/assignments/icmpv6-parameters
*/
#define ICMPV6_CODE_NONE 0 /* for types without codes */
#define ICMPV6_UNREACH 1 /* dest unreachable, codes: */
#define ICMPV6_UNREACH_NOROUTE 0 /* no route to dest */
#define ICMPV6_UNREACH_PROHIB 1 /* admin prohibited */
#define ICMPV6_UNREACH_SCOPE 2 /* beyond scope of source address */
#define ICMPV6_UNREACH_ADDR 3 /* address unreach */
#define ICMPV6_UNREACH_PORT 4 /* port unreach */
#define ICMPV6_UNREACH_FILTER_PROHIB 5 /* src failed ingress/egress policy */
#define ICMPV6_UNREACH_REJECT_ROUTE 6 /* reject route */
#define ICMPV6_TIMEXCEED 3 /* time exceeded, code: */
#define ICMPV6_TIMEXCEED_INTRANS 0 /* hop limit exceeded in transit */
#define ICMPV6_TIMEXCEED_REASS 1 /* fragmetn reassembly time exceeded */
#define ICMPV6_PARAMPROBLEM 4 /* parameter problem, code: */
#define ICMPV6_PARAMPROBLEM_FIELD 0 /* erroneous header field encountered */
#define ICMPV6_PARAMPROBLEM_NEXTHEADER 1 /* unrecognized Next Header type encountered */
#define ICMPV6_PARAMPROBLEM_OPTION 2 /* unrecognized IPv6 option encountered */
#define ICMPV6_ECHO 128 /* echo request */
#define ICMPV6_ECHOREPLY 129 /* echo reply */
/*
* Neighbor discovery types (RFC 4861)
*/
#define ICMPV6_NEIGHBOR_SOLICITATION 135
#define ICMPV6_NEIGHBOR_ADVERTISEMENT 136
#define ICMPV6_INFOTYPE(type) (((type) & 0x80) != 0)
/*
* Echo message data
*/
struct icmpv6_msg_echo {
uint16_t icmpv6_id;
uint16_t icmpv6_seq;
uint8_t icmpv6_data __flexarr; /* optional data */
};
/* Neighbor solicitation or advertisement (single hardcoded option).
RFC 4861, sections 4.3 and 4.4. */
struct icmpv6_msg_nd {
uint32_t icmpv6_flags;
ip6_addr_t icmpv6_target;
uint8_t icmpv6_option_type;
uint8_t icmpv6_option_length;
eth_addr_t icmpv6_mac;
};
/*
* ICMPv6 message union
*/
union icmpv6_msg {
struct icmpv6_msg_echo echo; /* ICMPV6_ECHO{REPLY} */
struct icmpv6_msg_nd nd; /* ICMPV6_NEIGHBOR_{SOLICITATION,ADVERTISEMENT} */
};
#ifndef __GNUC__
# pragma pack()
#endif
#define icmpv6_pack_hdr(hdr, type, code) do { \
struct icmpv6_hdr *icmpv6_pack_p = (struct icmpv6_hdr *)(hdr); \
icmpv6_pack_p->icmpv6_type = type; icmpv6_pack_p->icmpv6_code = code; \
} while (0)
#define icmpv6_pack_hdr_echo(hdr, type, code, id, seq, data, len) do { \
struct icmpv6_msg_echo *echo_pack_p = (struct icmpv6_msg_echo *)\
((uint8_t *)(hdr) + ICMPV6_HDR_LEN); \
icmpv6_pack_hdr(hdr, type, code); \
echo_pack_p->icmpv6_id = htons(id); \
echo_pack_p->icmpv6_seq = htons(seq); \
memmove(echo_pack_p->icmpv6_data, data, len); \
} while (0)
#define icmpv6_pack_hdr_ns_mac(hdr, targetip, srcmac) do { \
struct icmpv6_msg_nd *nd_pack_p = (struct icmpv6_msg_nd *) \
((uint8_t *)(hdr) + ICMPV6_HDR_LEN); \
icmpv6_pack_hdr(hdr, ICMPV6_NEIGHBOR_SOLICITATION, 0); \
nd_pack_p->icmpv6_flags = 0; \
memmove(&nd_pack_p->icmpv6_target, &(targetip), IP6_ADDR_LEN); \
nd_pack_p->icmpv6_option_type = 1; \
nd_pack_p->icmpv6_option_length = 1; \
memmove(&nd_pack_p->icmpv6_mac, &(srcmac), ETH_ADDR_LEN); \
} while (0)
#endif /* DNET_ICMPV6_H */
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