Package: inet.networklayer.ipv4

ICMP

simple module

ICMP implementation

Receive ICMP message from localDeliver and process it:

echo/timestamp reply: strip ICMP header and send to pingOut
echo/timestamp request: create reply and send to IPSend
destination unreachable: ignore/send to IPRouting (static)?
time exceeded: ignore ?
parameter problem: ignore ?
redirect ?

Receive echo/timestamp message from pingIn: encapsulate in ICMP header and send to IPSend

author: Jochen Reber date: 2.5.00, 9.5.00, 20.5.00, 9.6.00 redesign: Andras Varga 1.3.2004

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

Properties

Name	Value	Description
display	i=block/control_s

Gates

Name	Direction	Description
localIn	input	delivered ICMP packets
pingIn [ ]	input	ping requests from app
pingOut [ ]	output	result of ping
sendOut	output	towards network
errorOut	output	errors

Source code

//
// ICMP implementation
//
// Receive ICMP message from localDeliver and process it:
//   - echo/timestamp reply: strip ICMP header and send to pingOut
//   - echo/timestamp request: create reply and send to IPSend
//   - destination unreachable: ignore/send to IPRouting (static)?
//   - time exceeded: ignore ?
//   - parameter problem: ignore ?
//   - redirect ?
//#FIXME question marks above...
//
// Receive echo/timestamp message from pingIn: encapsulate in ICMP header
// and send to IPSend
//
// author: Jochen Reber
// date: 2.5.00, 9.5.00, 20.5.00, 9.6.00
// redesign: Andras Varga 1.3.2004
//
simple ICMP
{
    parameters:
        string interfaceTableModule;   // The path to the InterfaceTable module
        string routingTableModule;
        @display("i=block/control_s");
    gates:
        input localIn @labels(IPv4ControlInfo/up);  // delivered ICMP packets
        input pingIn[];  // ping requests from app
        output pingOut[];  // result of ping
        output sendOut @labels(IPv4ControlInfo/down);  // towards network
        output errorOut;  // errors
}

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