ICMPv6 echo messages

ICMPv6 echo request and reply More...

Detailed Description

ICMPv6 echo request and reply

Files
file	echo.h
	ICMPv6 echo message definitions.

Typedefs
typedef int(*	gnrc_icmpv6_echo_rsp_handle_cb_t) (gnrc_pktsnip_t *pkt, int corrupt, uint32_t rtt_us, void *ctx)
	ICMPv6 echo response callback.

Functions
gnrc_pktsnip_t *	gnrc_icmpv6_echo_build (uint8_t type, uint16_t id, uint16_t seq, uint8_t *data, size_t data_len)
	Builds an ICMPv6 echo message of type type for sending.
void	gnrc_icmpv6_echo_req_handle (gnrc_netif_t *netif, ipv6_hdr_t *ipv6_hdr, icmpv6_echo_t *echo, uint16_t len)
	ICMPv6 echo request handler.
int	gnrc_icmpv6_echo_send (const gnrc_netif_t *netif, const ipv6_addr_t *addr, uint16_t id, uint16_t seq, uint8_t ttl, size_t len)
	Send out ICMPv6 echo request.
int	gnrc_icmpv6_echo_rsp_handle (gnrc_pktsnip_t *pkt, size_t len, gnrc_icmpv6_echo_rsp_handle_cb_t cb, void *ctx)
	Parse ICMPv6 echo response.

Typedef Documentation

gnrc_icmpv6_echo_rsp_handle_cb_t

typedef int(* gnrc_icmpv6_echo_rsp_handle_cb_t) (gnrc_pktsnip_t *pkt, int corrupt, uint32_t rtt_us, void *ctx)

ICMPv6 echo response callback.

Parameters

[in]	pkt	Packet containing the ICMPv6 response
[in]	corrupt	Offset of corrupt payload, -1 if no corruption detected
[in]	rtt_us	round-trip-time in µs (0 if this information is not available)
[in]	ctx	User supplied context

Returns

0 on success

<0 on error

Definition at line 90 of file echo.h.

Function Documentation

gnrc_icmpv6_echo_build()

gnrc_pktsnip_t * gnrc_icmpv6_echo_build	(	uint8_t	type,
		uint16_t	id,
		uint16_t	seq,
		uint8_t *	data,
		size_t	data_len )

Builds an ICMPv6 echo message of type type for sending.

Parameters

[in]	type	Type of the echo message. Expected to be either ICMPV6_ECHO_REQ or ICMPV6_ECHO_REP.
[in]	id	ID for the echo message in host byte-order
[in]	seq	Sequence number for the echo message in host byte-order
[in]	data	Payload for the echo message
[in]	data_len	Length of data

Returns

The echo message on success

NULL, on failure

gnrc_icmpv6_echo_req_handle()

void gnrc_icmpv6_echo_req_handle	(	gnrc_netif_t *	netif,
		ipv6_hdr_t *	ipv6_hdr,
		icmpv6_echo_t *	echo,
		uint16_t	len )

ICMPv6 echo request handler.

Parameters

[in]	netif	The interface the echo request was received on.
[in]	ipv6_hdr	The IPv6 header of the echo request.
[in]	echo	The Echo Request message.
[in]	len	Length of the echo request message (ipv6_hdr_t::len of ipv6_hdr minus length of extension headers).

gnrc_icmpv6_echo_rsp_handle()

int gnrc_icmpv6_echo_rsp_handle	(	gnrc_pktsnip_t *	pkt,
		size_t	len,
		gnrc_icmpv6_echo_rsp_handle_cb_t	cb,
		void *	ctx )

Parse ICMPv6 echo response.

Parameters

[in]	pkt	Incoming ICMPv6 packet
[in]	len	Expected echo response payload length
[in]	cb	Callback function to execute
[in]	ctx	Callback function context

Returns

0 on success

<0 on error

gnrc_icmpv6_echo_send()

int gnrc_icmpv6_echo_send	(	const gnrc_netif_t *	netif,
		const ipv6_addr_t *	addr,
		uint16_t	id,
		uint16_t	seq,
		uint8_t	ttl,
		size_t	len )

Send out ICMPv6 echo request.

Parameters

[in]	netif	The interface the echo request should be sent on.
[in]	addr	The destination address of the echo request
[in]	id	ID for the echo message in host byte-order
[in]	seq	Sequence number for the echo message in host byte-order
[in]	ttl	Hop limit of the echo request
[in]	len	Length of the payload

Returns

0 on success

<0 on error