icmp6.h File Reference

#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/ip6_addr.h"
#include "lwip/netif.h"
#include "lwip/prot/icmp6.h"

Functions
void	icmp6_input (struct pbuf *p, struct netif *inp)
void	icmp6_dest_unreach (struct pbuf *p, enum icmp6_dur_code c)
void	icmp6_packet_too_big (struct pbuf *p, u32_t mtu)
void	icmp6_time_exceeded (struct pbuf *p, enum icmp6_te_code c)
void	icmp6_time_exceeded_with_addrs (struct pbuf *p, enum icmp6_te_code c, const ip6_addr_t *src_addr, const ip6_addr_t *dest_addr)
void	icmp6_param_problem (struct pbuf *p, enum icmp6_pp_code c, const void *pointer)

Detailed Description

IPv6 version of ICMP, as per RFC 4443.

Function Documentation

icmp6_dest_unreach()

void icmp6_dest_unreach	(	struct pbuf *	p,
		enum icmp6_dur_code	c
	)

Send an icmpv6 'destination unreachable' packet.

This function must be used only in direct response to a packet that is being received right now. Otherwise, address zones would be lost.

Parameters

p	the input packet for which the 'unreachable' should be sent, p->payload pointing to the IPv6 header
c	ICMPv6 code for the unreachable type

icmp6_input()

void icmp6_input	(	struct pbuf *	p,
		struct netif *	inp
	)

Process an input ICMPv6 message. Called by ip6_input.

Will generate a reply for echo requests. Other messages are forwarded to nd6_input, or mld6_input.

Parameters

p	the mld packet, p->payload pointing to the icmpv6 header
inp	the netif on which this packet was received

icmp6_packet_too_big()

void icmp6_packet_too_big	(	struct pbuf *	p,
		u32_t	mtu
	)

Send an icmpv6 'packet too big' packet.

This function must be used only in direct response to a packet that is being received right now. Otherwise, address zones would be lost.

Parameters

p	the input packet for which the 'packet too big' should be sent, p->payload pointing to the IPv6 header
mtu	the maximum mtu that we can accept

icmp6_param_problem()

void icmp6_param_problem	(	struct pbuf *	p,
		enum icmp6_pp_code	c,
		const void *	pointer
	)

Send an icmpv6 'parameter problem' packet.

This function must be used only in direct response to a packet that is being received right now. Otherwise, address zones would be lost and the calculated offset would be wrong (calculated against ip6_current_header()).

Parameters

p	the input packet for which the 'param problem' should be sent, p->payload pointing to the IP header
c	ICMPv6 code for the param problem type
pointer	the pointer to the byte where the parameter is found

icmp6_time_exceeded()

void icmp6_time_exceeded	(	struct pbuf *	p,
		enum icmp6_te_code	c
	)

Send an icmpv6 'time exceeded' packet.

This function must be used only in direct response to a packet that is being received right now. Otherwise, address zones would be lost.

Parameters

p	the input packet for which the 'time exceeded' should be sent, p->payload pointing to the IPv6 header
c	ICMPv6 code for the time exceeded type

icmp6_time_exceeded_with_addrs()

void icmp6_time_exceeded_with_addrs	(	struct pbuf *	p,
		enum icmp6_te_code	c,
		const ip6_addr_t *	src_addr,
		const ip6_addr_t *	dest_addr
	)

Send an icmpv6 'time exceeded' packet, with explicit source and destination addresses.

This function may be used to send a response sometime after receiving the packet for which this response is meant. The provided source and destination addresses are used primarily to retain their zone information.

Parameters

p	the input packet for which the 'time exceeded' should be sent, p->payload pointing to the IPv6 header
c	ICMPv6 code for the time exceeded type
src_addr	source address of the original packet, with zone information
dest_addr	destination address of the original packet, with zone information