ICMP implementation.

Author: Jochen Reber

Used in compound modules

Name	Type	Description
Ipv4NetworkLayer	compound module	Network layer of an IPv4 node.

Parameters

Name	Type	Default value	Description
interfaceTableModule	string		The path to the InterfaceTable module
routingTableModule	string
crcMode	string	"declared"
quoteLength	int	8B	Number of bytes from original packet to quote in ICMP reply

Properties

Name	Value	Description
display	i=block/control

Gates

Name	Direction	Size	Description
transportIn	input
transportOut	output
ipIn	input		delivered ICMP packets
ipOut	output		towards network

Direct method calls (observed)

call to	function	info
MessageDispatcher	inet::MessageDispatcher::arrived	arrived
MessageDispatcher	inet::MessageDispatcher::handleRegisterProtocol	handleRegisterProtocol
MessageDispatcher	inet::MessageDispatcher::handleRegisterService	handleRegisterService
Ipv4RoutingTable	inet::Ipv4RoutingTable::isLocalBroadcastAddress	isLocalBroadcastAddress(%u.%u.%u.%u)

Called methods (observed)

function	info	call from
inet::Icmp::handleRegisterProtocol	handleRegisterProtocol	MessageDispatcher
inet::Icmp::handleRegisterService	handleRegisterService	MessageDispatcher
inet::Icmp::sendErrorMessage	sendErrorMessage(datagram, type=%d, code=%d)	Ipv4, Udp

Incoming messages (observed)

gate	msg	kind	ctrl	srcModule	tags
ipIn	Packet	0		Ipv4	DispatchProtocolReq, DscpInd, EcnInd, HopLimitInd, InterfaceInd, L3AddressInd, NetworkProtocolInd, PacketProtocolTag, TosInd, DispatchProtocolInd?, ErrorRateInd?, Ieee802SapInd?, InterfaceReq?, MacAddressInd?, MacAddressReq?, SignalPowerInd?, SignalTimeInd?, SnirInd?, SocketReq?, UserPriorityInd?, LlcProtocolTag?, Ieee80211ChannelInd?, Ieee80211ModeInd?, Ieee80211ModeReq?

Outgoing messages (observed)

gate	msg	kind	ctrl	destModule	tags
ipOut	Packet	0		Ipv4	DispatchProtocolReq, L3AddressReq, PacketProtocolTag
transportOut	Packet	0		Tcp	DispatchProtocolReq, DscpInd, EcnInd, HopLimitInd, InterfaceInd, L3AddressInd, NetworkProtocolInd, PacketProtocolTag, TosInd
transportOut	Packet	0		Udp	DispatchProtocolReq, L3AddressInd, PacketProtocolTag, DscpInd?, EcnInd?, HopLimitInd?, InterfaceInd?, MacAddressInd?, NetworkProtocolInd?, TosInd?

Packet operations (observed)

chunkType	packetAction
	peekData, peekDataAsBytes, peekDataAt
BitsChunk	insertAtBack
ByteCountChunk	insertAtBack
BytesChunk	insertAtBack
IcmpEchoReply	insertAtFront
IcmpEchoRequest	popAtFront
IcmpHeader	insertAtFront, peekAtFront, peekDataAt
Ipv4Header	peekAtFront, peekDataAt
SequenceChunk	insertAtBack

Shared Tagging operations (observed)

tagType	tagAction
DispatchProtocolReq	addTagIfAbsent
L3AddressInd	addTag, getTag
L3AddressReq	addTag, addTagIfAbsent
PacketProtocolTag	addTag, addTagIfAbsent

Tagging operations (observed)

tagType	tagAction
inet::Ipv4InterfaceData	findTag

Source code

//
// ICMP implementation.
//
// @author Jochen Reber
//
simple Icmp
{
    parameters:
        string interfaceTableModule;   // The path to the InterfaceTable module
        string routingTableModule;
        string crcMode @mutable @enum("declared","computed") = default("declared");
        int quoteLength @mutable @unit(B) = default(8B); // Number of bytes from original packet to quote in ICMP reply
        @display("i=block/control");
    gates:
        input transportIn;
        output transportOut;
        input ipIn @labels(Ipv4ControlInfo/up);  // delivered ICMP packets
        output ipOut @labels(Ipv4ControlInfo/down);  // towards network
}

File: src/inet/networklayer/ipv4/Icmp.ned

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