Events

This module contains all event definitions.

FlowStart(env, delay, flow)	A Flow begins generating packets
LinkAvailable(env, delay, link)	A Router finishes sending a
PacketReceipt(env, delay, receiver, packet)	A Host or a Router
PacketTimeOut(env, delay, actor, expected_time)	A TLA Check if a packet time out happens
RoutingTableOutdated(env, delay, router)	A Router updates its routing table
VegasTimeOut(env, delay, actor)	A TCP Vegas updates its window size

Flow Start

class cs143sim.events.FlowStart(env, delay, flow)

A Flow begins generating packets

Parameters:

• env – SimPy simulation Environment
• delay (float) – time until Flow starts
• flow – Flow that starts

Link Available

class cs143sim.events.LinkAvailable(env, delay, link)

A Router finishes sending a Packet on Link

Parameters:

• env – SimPy simulation Environment
• delay (float) – time until Router finishes
• link – Link on which a Packet was sent

Packet Receipt

class cs143sim.events.PacketReceipt(env, delay, receiver, packet)

A Host or a Router receives a Packet on a Link

Parameters:

• env – SimPy simulation Environment
• delay (float) – time until Packet begins to arrive at Router (in ms)
• receiver – Host or Router that receives packet
• packet – Packet that arrives

PacketTimeOut

class cs143sim.events.PacketTimeOut(env, delay, actor, expected_time)

A TLA Check if a packet time out happens

Parameters:

• env – SimPy simulation Environment
• delay (float) – time until packet timeout.
• actor – the responsing TLA

RoutingTableOutdated

class cs143sim.events.RoutingTableOutdated(env, delay, router)

A Router updates its routing table

Parameters:

• env – SimPy simulation Environment
• delay (float) – time until Router updates
• router – Router that updates

VegasTimeOut

class cs143sim.events.VegasTimeOut(env, delay, actor)

A TCP Vegas updates its window size

Parameters:

• env – SimPy simulation Environment
• delay (float) – time until updating.
• actor – the responsing TCP Vegas