IcmpHeader

class

ICMP message class

Note: receiver MUST NOT decapsulate the datagram from ICMP error messages, because their contents is conceptually truncated. decapsulate() would result in a "length became negative" error; use getEncapsulatedMsg() instead.

TODO: add originator id and sequence number and create an ICMPControlInfo

Usage diagram

The following diagram shows usage relationships between types. Unresolved types are missing from the diagram.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Extends

Name	Type	Description
FieldsChunk	class	(no description)

Known subclasses

Name	Type	Description
IcmpEchoReply	class	(no description)
IcmpEchoRequest	class	(no description)

Fields

Name	Type	Description
chunkLength	b
type	IcmpType	1 byte
code	int	1 byte
chksum	int	2 bytes, RFC 1071
crcMode	CrcMode
mutable	bool
complete	bool
correct	bool
properlyRepresented	bool
rawBin	string[]
rawHex	string[]
tags	RegionTagSet::cObjectRegionTag[]

Source code

//
// ICMP message class
//
// Note: receiver MUST NOT decapsulate the datagram from ICMP error messages,
// because their contents is conceptually truncated. decapsulate() would result
// in a "length became negative" error; use getEncapsulatedMsg() instead.
//
// TODO: add originator id and sequence number and create an ICMPControlInfo
class IcmpHeader extends FieldsChunk
{
    chunkLength = B(8);
    IcmpType type;   // 1 byte
    int code = -1;                   // 1 byte
    int chksum = 0;                 // 2 bytes, RFC 1071
    CrcMode crcMode = CRC_MODE_UNDEFINED;
}

File: src/inet/networklayer/ipv4/IcmpHeader.msg