PollApplLayer Class Reference
[applLayer - application layer modules]

Base station application layer to test centralized scenarios. More...

#include <PollApplLayer.h>

Inherits ClientApplLayer.

Inheritance diagram for PollApplLayer:

[legend]Collaboration diagram for PollApplLayer:

[legend]List of all members.

Public Member Functions
	Module_Class_Members (PollApplLayer, ClientApplLayer, 0)
virtual void	initialize (int)
	Initialite module parameters.
virtual void	finish ()
Protected Types
typedef std::map< int, bool >	cAliveMap
typedef std::map< int, int >	cNetwAddrMap
typedef cAliveMap::iterator	cAliveMapIterator
Protected Member Functions
virtual void	handleLowerMsg (cMessage *)
	Handle messages from lower layer...
virtual void	handleSelfMsg (cMessage *)
	Handle self messages such as timer...
void	sendBroadcast ()
	Send a broadcast packet to all connected neighbors.
void	sendPoll (int)
	Send a poll message to 'addr'.
void	pollNext ()
	Poll next client in the list.
Protected Attributes
int	numClients
	Number of clients in the network.
int	aliveClients
	Number of alive clients in the network.
double	broadcastInterval
	Time between broadcasts in seconds.
double	pollTimeout
	Timeout for poll messages in seconds.
cAliveMap	clients
	Map to store all reachable clients.
cNetwAddrMap	clientAddrs
	Map to store the netw addresses o fthe clients.
cAliveMapIterator	it
	Iterator for the clients map.
cMessage *	pollTimer
	Timer message for polling.

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Detailed Description

Base station application layer to test centralized scenarios.

Application layer for a base station in a centralized WLAN-like network. Every 'broadcastInterval' it broadcasts a ping message to determine the reachable clients. Afterwards it polls all reachable clients in a round-robin manner, where 'pollTimeout' is the reply timeout for the clients.

See also:

ClientApplLayer

Author:

Daniel Willkomm

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Member Function Documentation

void PollApplLayer::handleLowerMsg (  cMessage *  msg  )  [protected, virtual]

Handle messages from lower layer... There are two kinds of messages that can arrive at this module: The first (kind = BROADCAST_REPLY_MESSAGE) is a reply to a broadcast packet that we have sent and results in an update of the clients list. The second (kind = POLL_REPLY) is a reply to a poll packet that we have sent. The pollTimer has to be deleted and the next client can be polled. Reimplemented from ClientApplLayer.

void PollApplLayer::handleSelfMsg (  cMessage *  msg  )  [protected, virtual]

Handle self messages such as timer... A timer with kind = SEND_BROADCAST_TIMER indicates that a new broadcast has to be send (sendBroadcast). kind = POLL_REPLY_TIMEOUT invalidates the client entry, and for now just prints debug output and calls pollNext to poll the next client in the list. kind = BROADCAST_REPLY_TIMEOUT indicates the end of the broadcast period and starts the polling period. See also: sendBroadcast, pollNext Reimplemented from BasicApplLayer.

void PollApplLayer::initialize (  int  stage  )  [virtual]

Initialite module parameters. Read ned parameters and schedule first broadcast timer Reimplemented from BasicApplLayer.

void PollApplLayer::pollNext (   )  [protected]

Poll next client in the list. Poll the next reachable client in the list. If there are no more clients, just return.

void PollApplLayer::sendBroadcast (   )  [protected]

Send a broadcast packet to all connected neighbors. This function creates a new broadcast message and sends it down to the network layer

void PollApplLayer::sendPoll (  int  addr  )  [protected]

Send a poll message to 'addr'. This function creates a new poll message to poll 'addr' and sends it down to the network layer Parameters: addr  Address of the client to poll.

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The documentation for this class was generated from the following files:

• PollApplLayer.h
• PollApplLayer.cc

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