httpServer_WM (Scalable Simulation Framework)

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SSF.App.DDoS
Class httpServer_WM

java.lang.Object
  |
  +--SSF.OS.ProtocolSession
        |
        +--SSF.App.DDoS.httpServer_WM

All Implemented Interfaces:: com.renesys.raceway.DML.Configurable

public class httpServer_WM
extends ProtocolSession

A simple HTTP server traffic generator. The server configures itself from the DML file. After receiving an httpRequest, the server spawns a slave server that first sends an httpResponse, and then sends the virtual data to the client until the request is fulfilled, and possibly closes the TCP connection if the httpRequest contained the CLOSE directive.

The default is no limit on the number of clients, unless the attribute client_limit is set.

There is no limit on the number of servers that can coexist in a single Host as long as each httpServer has a distinct wellKnownPort number.

It's modified from httpServer to support monitors.

Field Summary

Fields inherited from class SSF.OS.ProtocolSession

name, use

Constructor Summary

httpServer_WM()
          Constructors

Method Summary

void config(com.renesys.raceway.DML.Configuration cfg)
          httpServer configuration.

boolean getMonitorEnable()
          An ProtocolMonitor may inquire if IP calls to its receive() are enabled

void init()
          Start the server

boolean push(ProtocolMessage message, ProtocolSession fromSession)
          Routine to call when a message is being sent to ("pushed into") this ProtocolSession by another ProtocolSession.

void serv()
          httpServer configuration.

void setMonitorEnable(boolean en)
          An ProtocolMonitor may turn on and off calls to its receive() method.

Methods inherited from class SSF.OS.ProtocolSession

close, closed, debugIdentifier, inGraph, open, opened, pushAfterDelay, pushAfterDelayFailed, setGraph, version

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

httpServer_WM

public httpServer_WM()

Constructors

Method Detail

config

public void config(com.renesys.raceway.DML.Configuration cfg)
            throws com.renesys.raceway.DML.configException

httpServer configuration. Example of supported DML attributes:

   ProtocolSession [ name server use SSF.OS.WWW.httpServer
     port 80            # server's HTTP port

     client_limit  10     # max number of simultaneous established client
                          # connections, if omitted, default is unlimited.
                          # If exceeded, connection request is ignored
                          # and left to time out.

     queue_limit   5      # maximum size of pending connection request
                          # queue, Qlimit, if omitted default is 5.
                          # Determines the total number of pending
                          # connection requests (see SSF.OS.TCP.tcpSocket).
                          # If exceeded, the listening socket sends RESET
                          # to client and drops the request.

     # distribution of the number of objects in a page request:
     # if random variable = 0, round up to 1
     # NOTE: the response to page request contains the 1st object

     objects_in_page [
       distribution [
         name "Pareto"              # distribution class name
         k 0.6667                   # scale (cutoff) parameter
         alpha 1.2                  # shape (exponent) parameter
       ]
     ]

     # distribution of sizes of objects (in bytes)
     # if random variable = 0, round up to 1

     object_size [
       distribution [
         name "Pareto"              # distribution class name
         k 2000.0                   # scale (cutoff) parameter
         alpha 1.2                  # shape (exponent) parameter
       ]
     ]

     # distribution of server delays between request and response (in seconds)
     # NOT IMPLEMENTED

     response_delay [
       distribution [
         name "Exponential"           # distribution class name
         lambda 10.0                  # mean = 1/lambda
       ]
     ]

     http_hdr_size 1000  # nominal HTTP header size (virtual bytes) read from a socket
                         # before reading data (if indicated by http header)

     show_report true    # print client-server session summary report
     debug false         # print verbose client/server diagnostics

      # BELOW IS ADDED FOR MONITOR
     monitor [
       use SSF.OS.WWW.RequestsMonitor
       probe_interval 3.0
       debug false
     ]
   ]

Specified by:: config in interface com.renesys.raceway.DML.Configurable
Overrides:: config in class ProtocolSession

com.renesys.raceway.DML.configException

init

public void init()

Start the server

Overrides:: init in class ProtocolSession

push

public boolean push(ProtocolMessage message,
                    ProtocolSession fromSession)
             throws ProtocolException

Description copied from class: ProtocolSession

Routine to call when a message is being sent to ("pushed into") this ProtocolSession by another ProtocolSession. The pusher sends a reference to itself in the second argument. This push happens immediately, without any simulation time elapsing, regardless of other activities taking place in the ProtocolGraph.

If you desire "safe" interaction with other CPU activities, even though your push() consumes no measurable/modelable CPU cycles, define the "cpudelay true" attribute for the ProtocolGraph and use pushAfterDelay(message,fromSession,0.0). This will guarantee proper ordering; that is, the framework will wait until the CPU is free before proceeding with the requested push().

Specified by:: push in class ProtocolSession

ProtocolException

serv

public void serv()