IcmpHeader¶

Namespace: inet

class IcmpHeader

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¶

Inheritance diagram¶

Extends¶

Name	Type	Description
FieldsChunk	class	(no description)

Known subclasses¶

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

Fields¶

Name	Type	Description
id	int
mutable	bool
complete	bool
correct	bool
properlyRepresented	bool
chunkLength	b
rawBin	string[]
rawHex	string[]
regionTags	SharingRegionTagSet::TagBaseRegionTag[]
chunkLength
type	IcmpType	1 byte
code	int	1 byte
chksum	int	2 bytes, RFC 1071
checksumMode	ChecksumMode

Properties¶

Name	Value	Description
beforeChange	handleChange()
descriptor	readonly
existingClass
packetData

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
    ChecksumMode checksumMode = CHECKSUM_MODE_UNDEFINED;
}

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