IPv6 destination and hop-by-hop options

Definitions for IPv6 destination and hop-by-hop options extension headers. More...

Detailed Description

Definitions for IPv6 destination and hop-by-hop options extension headers.

Files
file	opt.h
	Destination and hop-by-hop options extension header definitions.

Destination and hop-by-hop option types
See also IANA, IPv6 parameters
#define	IPV6_EXT_OPT_PAD1   (0x00U)
	Pad1.
#define	IPV6_EXT_OPT_PADN   (0x01U)
	PadN.
#define	IPV6_EXT_OPT_JUMBO   (0xC2U)
	Jumbo payload.
#define	IPV6_EXT_OPT_RPL   (0x63U)
	RPL Option.
#define	IPV6_EXT_OPT_TEL   (0x04U)
	Tunnel Encapsulation Limit.
#define	IPV6_EXT_OPT_RTR_ALERT   (0x05U)
	Router Alert.
#define	IPV6_EXT_OPT_QUICK_START   (0x26U)
	Quick-Start.
#define	IPV6_EXT_OPT_CALIPSO   (0x07U)
	CALIPSO.
#define	IPV6_EXT_OPT_SMF_DPD   (0x08U)
	SMF_DPD.
#define	IPV6_EXT_OPT_HOME_ADDR   (0xC9U)
	Home Address.
#define	IPV6_EXT_OPT_ILNP_NONCE   (0x8BU)
	ILNP Nonce.
#define	IPV6_EXT_OPT_LIO   (0x8CU)
	Line-Identification Option.
#define	IPV6_EXT_OPT_MPL   (0x6DU)
	MPL Option.
#define	IPV6_EXT_OPT_IP_DFF   (0xEEU)
	IP_DFF.
#define	IPV6_EXT_OPT_PDM   (0x0FU)
	Performance and Diagnostic Metrics.

Processing actions
See also RFC 8200, section 4.2 The Option Type identifiers are internally encoded such that their highest-order 2 bits specify the action that must be taken if the processing IPv6 node does not recognize the Option Type
#define	IPV6_EXT_OPT_ACTION_MASK   (0xc0)
	mask to decode action from type
#define	IPV6_EXT_OPT_ACTION_SKIP   (0x00)
	skip over this option and continue processing the header
#define	IPV6_EXT_OPT_ACTION_DISC   (0x40)
	discard the packet
#define	IPV6_EXT_OPT_ACTION_DISC_ERR_MCAST   (0x80)
	discard the packet More...
#define	IPV6_EXT_OPT_ACTION_DISC_ERR   (0xc0)
	discard the packet More...

Macro Definition Documentation

IPV6_EXT_OPT_ACTION_DISC_ERR

#define IPV6_EXT_OPT_ACTION_DISC_ERR   (0xc0)

discard the packet

and, only if the packet's Destination Address was not a multicast address, send an ICMP Parameter Problem, Code 2, message to the packet's Source Address, pointing to the unrecognized Option Type.

Definition at line 88 of file opt.h.

IPV6_EXT_OPT_ACTION_DISC_ERR_MCAST

#define IPV6_EXT_OPT_ACTION_DISC_ERR_MCAST   (0x80)

discard the packet

and, regardless of whether or not the packet's Destination Address was a multicast address, send an ICMP Parameter Problem, Code 2, message to the packet's Source Address, pointing to the unrecognized Option Type.

Definition at line 79 of file opt.h.