ICMP socket instruction. More...

#include <socket_api.h>

Data Fields
uint8_t	event_type
	Socket Callback Event check list below.
int8_t	socket_id
	Socket id queue which socket cause call back.
int8_t	interface_id
	Network Interface ID where Packet came.
uint16_t	d_len
	Data length if event type is SOCKET_DATA.
uint8_t	LINK_LQI
	LINK LQI info if interface cuold give.

Detailed Description

ICMP socket instruction.

ICMP header is comprised of 4 bytes. The first byte is for type, second for code and the last two are for checksum that must always be zero. The stack will calculate the checksum automatically when sending the packet. The payload comes after the header and it can be of any length. It can also be set to 0.

This applies for reading and sending.

ICMP TYPE ICMP Code ICMP Checksum (2 bytes) Payload n bytes -------- -------- -------- -------- -------- -------- ....... ------- 0xXX 0xXX 0x00 0x00 0xXX 0xXX ...... 0xXX

Example data flow for ping:

ICMP echo request with 4-bytes payload (Ping6). 0x80, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03

ICMP echo response for the message above. 0x81, 0x00, 0xXX, 0xXX, 0x00, 0x01, 0x02, 0x03

Socket Callback function structure type.

Definition at line 179 of file net/FEATURE_IPV6/sal-stack-nanostack/nanostack/socket_api.h.