Utils
Class Utils

java.lang.Object
  Utils.Utils

public class Utils
extends java.lang.Object

Class holding different utility methods for the application

Author:

Ioannis Kakavas, Spyridon Dossis

Field Summary

(package private) static byte[]

HEX_CHAR_TABLE

Constructor Summary

Utils()

Method Summary

static java.util.Hashtable<com.adventnet.snmp.snmp2.SnmpOID,com.adventnet.snmp.snmp2.SnmpVar>	createInterfaceList(com.adventnet.snmp.snmp2.SnmpSession session, java.lang.String userName) Creates a hashtable holding all the router's interfaces
static java.util.Hashtable<com.adventnet.snmp.snmp2.SnmpOID,com.adventnet.snmp.snmp2.SnmpVar>	createIpList(com.adventnet.snmp.snmp2.SnmpSession session, java.lang.String userName) Creates a Hashtable containing the IP Addresses
static java.util.Vector<java.lang.String>	createNeighborsList(com.adventnet.snmp.snmp2.SnmpSession session, java.lang.String userName) Creates a Vector holding all the IP addresses in the routing table referring to other machines.
static void	createRouterConnections(RouterCollection r) Creates a .dot file containing all the information needed to create a graph of the router topology using some external tool like neato (Graphviz packet)
static java.lang.String	determineRouterID(java.util.Vector<com.adventnet.snmp.snmp2.SnmpVarBind> addresses) Gets all the IP addresses of the router, and returns the lower one
static java.lang.String	getHexString(byte[] raw)
static double	getRouterLoad(java.util.Vector<java.lang.Long> samples, long pollingDuration)
static long	inOctetsSum(java.util.Vector<com.adventnet.snmp.snmp2.SnmpVarBind> v) Calculates the sum of inOctets for all the interfaces of the router
static void	printHashtable(java.util.Hashtable<com.adventnet.snmp.snmp2.SnmpOID,com.adventnet.snmp.snmp2.SnmpVar> hashTable)
static void	printSnmpVarBindVectors(java.util.Vector<com.adventnet.snmp.snmp2.SnmpVarBind> v)
static void	writeToFile(RouterCollection r, java.lang.String filename) Writes the information about the discovered routers in a file in logs directory.

Methods inherited from class java.lang.Object

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

Field Detail

HEX_CHAR_TABLE

static final byte[] HEX_CHAR_TABLE

Constructor Detail

Utils

public Utils()

Method Detail

determineRouterID

public static java.lang.String determineRouterID(java.util.Vector<com.adventnet.snmp.snmp2.SnmpVarBind> addresses)

Gets all the IP addresses of the router, and returns the lower one

Parameters:

addresses - - Vector holding the ip addresses of the router interfaces

Returns:

String routerID

createInterfaceList

public static java.util.Hashtable<com.adventnet.snmp.snmp2.SnmpOID,com.adventnet.snmp.snmp2.SnmpVar> createInterfaceList(com.adventnet.snmp.snmp2.SnmpSession session,
                                                                                                                         java.lang.String userName)

Creates a hashtable holding all the router's interfaces

Parameters:

session -

userName -

Returns:

Hashtable

createIpList

public static java.util.Hashtable<com.adventnet.snmp.snmp2.SnmpOID,com.adventnet.snmp.snmp2.SnmpVar> createIpList(com.adventnet.snmp.snmp2.SnmpSession session,
                                                                                                                  java.lang.String userName)

Creates a Hashtable containing the IP Addresses

Parameters:

session -

Returns:

Hashtable

createNeighborsList

public static java.util.Vector<java.lang.String> createNeighborsList(com.adventnet.snmp.snmp2.SnmpSession session,
                                                                     java.lang.String userName)

Creates a Vector holding all the IP addresses in the routing table referring to other machines.

Parameters:

session -

Returns:

inOctetsSum

public static long inOctetsSum(java.util.Vector<com.adventnet.snmp.snmp2.SnmpVarBind> v)

Calculates the sum of inOctets for all the interfaces of the router

Parameters:

v - Vector holding the SnmpVar Bindings for a specified router concerning inOctets for all its interfaces

Returns:

The sum of incoming bytes in all the router's interfaces

getRouterLoad

public static double getRouterLoad(java.util.Vector<java.lang.Long> samples,
                                   long pollingDuration)

Parameters:

samples -

pollingDuration -

Returns:

printSnmpVarBindVectors

public static void printSnmpVarBindVectors(java.util.Vector<com.adventnet.snmp.snmp2.SnmpVarBind> v)

printHashtable

public static void printHashtable(java.util.Hashtable<com.adventnet.snmp.snmp2.SnmpOID,com.adventnet.snmp.snmp2.SnmpVar> hashTable)

writeToFile

public static void writeToFile(RouterCollection r,
                               java.lang.String filename)

Writes the information about the discovered routers in a file in logs directory. Used when DiscoverTopology is called with the "-w" option

Parameters:

r - The RouterCollection of the Discovered routers

filename - The name of the file to save the information to.

createRouterConnections

public static void createRouterConnections(RouterCollection r)

Creates a .dot file containing all the information needed to create a graph of the router topology using some external tool like neato (Graphviz packet)

Parameters:

r - The RouterCollection of the discovered routers

getHexString

public static java.lang.String getHexString(byte[] raw)
                                     throws java.io.UnsupportedEncodingException

Throws:

java.io.UnsupportedEncodingException