Send and receive IPv4 or IPv6 ICMP Echo Request messages.

ICMP sending and receiving. More...

Data Structures
struct	net_icmp_ctx
	ICMP context structure. More...
struct	net_icmp_ip_hdr
	Struct presents either IPv4 or IPv6 header in ICMP response message. More...
struct	net_icmp_ping_params
	Struct presents parameters that are needed when sending Echo-Request (ping) messages. More...
struct	net_icmp_offload
	ICMP offload context structure. More...

Macros
#define	NET_ICMPV4_ECHO_REQUEST   8
#define	NET_ICMPV4_ECHO_REPLY   0
#define	NET_ICMPV6_ECHO_REQUEST   128
#define	NET_ICMPV6_ECHO_REPLY   129

Typedefs
typedef int(*	net_icmp_handler_t) (struct net_icmp_ctx *ctx, struct net_pkt *pkt, struct net_icmp_ip_hdr *ip_hdr, struct net_icmp_hdr *icmp_hdr, void *user_data)
	Handler function that is called when ICMP response is received.
typedef int(*	net_icmp_offload_ping_handler_t) (struct net_icmp_ctx *ctx, struct net_if *iface, struct sockaddr *dst, struct net_icmp_ping_params *params, void *user_data)
	Handler function that is called when an Echo-Request is sent to offloaded device.

Functions
int	net_icmp_init_ctx (struct net_icmp_ctx *ctx, uint8_t type, uint8_t code, net_icmp_handler_t handler)
	Initialize the ICMP context structure.
int	net_icmp_cleanup_ctx (struct net_icmp_ctx *ctx)
	Cleanup the ICMP context structure.
int	net_icmp_send_echo_request (struct net_icmp_ctx *ctx, struct net_if *iface, struct sockaddr *dst, struct net_icmp_ping_params *params, void *user_data)
	Send ICMP echo request message.
int	net_icmp_register_offload_ping (struct net_icmp_offload *ctx, struct net_if *iface, net_icmp_offload_ping_handler_t ping_handler)
	Register a handler function that is called when an Echo-Request is sent to the offloaded device.
int	net_icmp_unregister_offload_ping (struct net_icmp_offload *ctx)
	Unregister the offload handler.
int	net_icmp_get_offload_rsp_handler (struct net_icmp_offload *ctx, net_icmp_handler_t *resp_handler)
	Get a ICMP response handler function for an offloaded device.

Detailed Description

ICMP sending and receiving.

Macro Definition Documentation

NET_ICMPV4_ECHO_REPLY

#define NET_ICMPV4_ECHO_REPLY   0

#include <zephyr/net/icmp.h>

NET_ICMPV4_ECHO_REQUEST

#define NET_ICMPV4_ECHO_REQUEST   8

#include <zephyr/net/icmp.h>

NET_ICMPV6_ECHO_REPLY

#define NET_ICMPV6_ECHO_REPLY   129

#include <zephyr/net/icmp.h>

NET_ICMPV6_ECHO_REQUEST

#define NET_ICMPV6_ECHO_REQUEST   128

#include <zephyr/net/icmp.h>

Typedef Documentation

net_icmp_handler_t

net_icmp_handler_t

#include <zephyr/net/icmp.h>

Handler function that is called when ICMP response is received.

Parameters

ctx	ICMP context to use.
pkt	Received ICMP response network packet.
ip_hdr	IP header of the packet.
icmp_hdr	ICMP header of the packet.
user_data	A valid pointer to user data or NULL

net_icmp_offload_ping_handler_t

net_icmp_offload_ping_handler_t

#include <zephyr/net/icmp.h>

Handler function that is called when an Echo-Request is sent to offloaded device.

This handler is typically setup by the device driver so that it can catch the ping request and send it to the offloaded device.

Parameters

ctx	ICMP context used in this request.
iface	Network interface, can be set to NULL in which case the interface is selected according to destination address.
dst	IP address of the target host.
params	Echo-Request specific parameters. May be NULL in which case suitable default parameters are used.
user_data	User supplied opaque data passed to the handler. May be NULL.

Function Documentation

net_icmp_cleanup_ctx()

int net_icmp_cleanup_ctx

(

struct net_icmp_ctx *

ctx

)

#include <zephyr/net/icmp.h>

Cleanup the ICMP context structure.

This will unregister the ICMP handler from the system.

Parameters

ctx	ICMP context used in this request.

net_icmp_get_offload_rsp_handler()

int net_icmp_get_offload_rsp_handler	(	struct net_icmp_offload *	ctx,
		net_icmp_handler_t *	resp_handler
	)

#include <zephyr/net/icmp.h>

Get a ICMP response handler function for an offloaded device.

When a ping response is received by the driver, it should call the handler function with proper parameters so that the ICMP response is received by the net stack.

Parameters

ctx	ICMP offload context used in this request.
resp_handler	Function to be called when offloaded ping response is received by the offloaded driver. The ICMP response handler function is returned and the caller should call it when appropriate.

Returns

Return 0 if the call succeed, <0 otherwise.

net_icmp_init_ctx()

int net_icmp_init_ctx	(	struct net_icmp_ctx *	ctx,
		uint8_t	type,
		uint8_t	code,
		net_icmp_handler_t	handler
	)

#include <zephyr/net/icmp.h>

Initialize the ICMP context structure.

Must be called before ICMP messages can be sent. This will register handler to the system.

Parameters

ctx	ICMP context used in this request.
type	Type of ICMP message we are handling.
code	Code of ICMP message we are handling.
handler	Callback function that is called when a response is received.

net_icmp_register_offload_ping()

int net_icmp_register_offload_ping	(	struct net_icmp_offload *	ctx,
		struct net_if *	iface,
		net_icmp_offload_ping_handler_t	ping_handler
	)

#include <zephyr/net/icmp.h>

Register a handler function that is called when an Echo-Request is sent to the offloaded device.

This function is typically called by a device driver so that it can do the actual offloaded ping call.

Parameters

ctx	ICMP offload context used for this interface.
iface	Network interface of the offloaded device.
ping_handler	Function to be called when offloaded ping request is done.

Returns

Return 0 if the register succeed, <0 otherwise.

net_icmp_send_echo_request()

int net_icmp_send_echo_request	(	struct net_icmp_ctx *	ctx,
		struct net_if *	iface,
		struct sockaddr *	dst,
		struct net_icmp_ping_params *	params,
		void *	user_data
	)

#include <zephyr/net/icmp.h>

Send ICMP echo request message.

Parameters

ctx	ICMP context used in this request.
iface	Network interface, can be set to NULL in which case the interface is selected according to destination address.
dst	IP address of the target host.
params	Echo-Request specific parameters. May be NULL in which case suitable default parameters are used.
user_data	User supplied opaque data passed to the handler. May be NULL.

Returns

Return 0 if the sending succeed, <0 otherwise.

net_icmp_unregister_offload_ping()

int net_icmp_unregister_offload_ping

(

struct net_icmp_offload *

ctx

)

#include <zephyr/net/icmp.h>

Unregister the offload handler.

Parameters

ctx	ICMP offload context used for this interface.

Returns

Return 0 if the call succeed, <0 otherwise.