Simple Module DHT

Package: oversim.applications.dht
File: src/applications/dht/DHT.ned

Simple module of the DHT

Author: Gregoire Menuel, Ingmar Baumgart

Usage diagram:

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Inheritance diagram:

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Extends:

Name	Type	Description
BaseApp	simple module	Base class for application implementations

Used in compound modules:

Name	Type	Description
DHTModules	compound module	Compound module for a simple DHT using the KBR interface

Parameters:

Name	Type	Description
rpcUdpTimeout	double	default timeout value for direct RPCs
rpcKeyTimeout	double	default timeout value for routed RPCs
optimizeTimeouts	bool	calculate timeouts from measured RTTs and network coordinates
rpcExponentialBackoff	bool	if true, doubles the timeout for every retransmission
debugOutput	bool	enable debug output
numReplica	int	number of replica for stored data records
numGetRequests	int	number of queried replica for get requests
ratioIdentical	double	ratio of identical replica needed for a valid result
secureMaintenance	bool	use a secure maintenance algorithm based on majority decisions
invalidDataAttack	bool	if node is malicious, it tries a invalidData attack
maintenanceAttack	bool	if node is malicious, it tries a maintenance attack

Properties:

Name	Value	Description
class	DHT
display	i=block/app

Gates:

Name	Direction	Description
udpIn	input	gate from the UDP layer
from_lowerTier	input	gate from the lower tier
from_upperTier	input	gate from the upper tier
direct_in	input	gate for sendDirect
trace_in	input	gate for trace file commands
tcpIn	input	gate from the TCP layer
tcpOut	output	gate to the TCP layer
udpOut	output	gate to the UDP layer
to_lowerTier	output	gate to the lower tier
to_upperTier	output	gate to the upper tier

Source code:

//
// Simple module of the DHT
//
// @author Gregoire Menuel, Ingmar Baumgart
//
simple DHT extends BaseApp
{
    parameters:
        @class(DHT);
        int numReplica;  // number of replica for stored data records
        int numGetRequests; // number of queried replica for get requests
        double ratioIdentical; // ratio of identical replica needed for a valid result
        bool secureMaintenance; // use a secure maintenance algorithm based on majority decisions
        bool invalidDataAttack; // if node is malicious, it tries a invalidData attack
        bool maintenanceAttack; // if node is malicious, it tries a maintenance attack
}