OpenNMS API 1.2.3

org.opennms.protocols.icmp
Class TimestampRequest

java.lang.Object
  extended byorg.opennms.protocols.icmp.ICMPHeader
      extended byorg.opennms.protocols.icmp.TimestampRequest

public final class TimestampRequest
extends ICMPHeader

This is the implementation of an ICMP timestamp reqeust object. The object can be stored in a buffer to send or loaded from a received buffer. The class is marked final since it is not intended to be extended.

Version:
0.1
Author:
Brian Weaver

Field Summary
private  int m_origStamp
           
 
Fields inherited from class org.opennms.protocols.icmp.ICMPHeader
CODE_BAD_IP_HEADER, CODE_COMMUNICATIONS_ADMIN_PROHIBITIED, CODE_DESTINATION_HOST_ADMIN_PROHIBITED, CODE_DESTINATION_HOST_UNKNOWN, CODE_DESTINATION_NETWORK_ADMIN_PROHIBITED, CODE_DESTINATION_NETWORK_UNKNOWN, CODE_FRAGMENTATION_NEEDED, CODE_HOST_PRECEDENCE_VIOLATION, CODE_HOST_UNREACHABLE, CODE_HOST_UNREACHABLE_FOR_TOS, CODE_NETWORK_UNREACHABLE, CODE_NETWORK_UNREACHABLE_FOR_TOS, CODE_PORT_UNREACHABLE, CODE_PRECEDENCE_CUTOFF_IN_EFFECT, CODE_PROTOCOL_UNREACHABLE, CODE_REDIRECT_FOR_HOST, CODE_REDIRECT_FOR_NETWORK, CODE_REDIRECT_FOR_TYPE_OF_SERVICE_AND_HOST, CODE_REDIRECT_FOR_TYPE_OF_SERVICE_AND_NETWORK, CODE_REQUIRED_OPTION_MISSING, CODE_SOURCE_HOST_ISOLATED, CODE_SOURCE_ROUTE_FAILED, CODE_TTL_EQ_ZERO_IN_REASSEMBLY, CODE_TTL_EQ_ZERO_IN_TRANSIT, TYPE_ADDRESS_MASK_REPLY, TYPE_ADDRESS_MASK_REQUEST, TYPE_DESTINATION_UNREACHABLE, TYPE_ECHO_REPLY, TYPE_ECHO_REQUEST, TYPE_INFORMATION_REPLY, TYPE_INFORMATION_REQUEST, TYPE_PARAMETER_PROBLEM, TYPE_REDIRECT, TYPE_ROUTER_ADVERTISEMENT, TYPE_ROUTER_SOLICITATION, TYPE_SOURCE_QUENCH, TYPE_TIME_EXCEEDED, TYPE_TIMESTAMP_REPLY, TYPE_TIMESTAMP_REQUEST
 
Constructor Summary
TimestampRequest()
          Creates a new ICMP Timestamp Request object.
TimestampRequest(byte[] buf, int offset)
          Creates a new ICMP timestamp request from the spcified data at the specific offset.
 
Method Summary
 void computeChecksum()
          Computes the ones compliment 16-bit checksum for the ICMP message.
 int getOriginateTS()
          Retreives the current timestamp of the reqeust object.
 int loadFromBuffer(byte[] buf, int offset)
          Reads the ICMP Address Mask Reqeust from the specified buffer and sets the internal fields equal to the data.
 void setOriginateTS()
          Sets the originate timestamp to the current date in millisecond resolution.
 void setOriginateTS(int ts)
          Sets the originate timestamp to the passed value.
 int storeToBuffer(byte[] buf, int offset)
          Writes the ICMP address mask request out to the specified buffer at the starting offset.
 byte[] toBytes()
          Converts the object to an array of bytes.
 
Methods inherited from class org.opennms.protocols.icmp.ICMPHeader
byteToInt, byteToShort, computeChecksum, getChecksum, getCode, getIdentity, getNetworkSize, getSequenceId, getType, isEchoReply, isEchoRequest, nextSequenceId, setChecksum, setCode, setIdentity, setNextSequenceId, setSequenceId, setType
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

m_origStamp

private int m_origStamp
Constructor Detail

TimestampRequest

public TimestampRequest()
Creates a new ICMP Timestamp Request object.


TimestampRequest

public TimestampRequest(byte[] buf,
                        int offset)
Creates a new ICMP timestamp request from the spcified data at the specific offset.

Parameters:
buf - The buffer containing the data.
offset - The start of the icmp data.
Throws:
java.lang.IndexOutOfBoundsException - Thrown if there is not sufficent data in the buffer.
java.lang.IllegalArgumentException - Thrown if the ICMP type is not an Timestamp Request.
Method Detail

computeChecksum

public final void computeChecksum()
Computes the ones compliment 16-bit checksum for the ICMP message.

Overrides:
computeChecksum in class ICMPHeader

storeToBuffer

public final int storeToBuffer(byte[] buf,
                               int offset)
Writes the ICMP address mask request out to the specified buffer at the starting offset. If the buffer does not have sufficent data to store the information then an IndexOutOfBoundsException is thrown.

Overrides:
storeToBuffer in class ICMPHeader
Parameters:
buf - The storage buffer.
offset - The location to start in buf.
Returns:
The new offset after storing to the buffer.
Throws:
java.lang.IndexOutOfBoundsException - Thrown if the buffer does not have enough storage space.

loadFromBuffer

public final int loadFromBuffer(byte[] buf,
                                int offset)
Reads the ICMP Address Mask Reqeust from the specified buffer and sets the internal fields equal to the data. If the buffer does not have sufficent data to restore the header then an IndexOutOfBoundsException is thrown by the method. If the buffer does not contain an address mask reqeust then an IllegalArgumentException is thrown.

Overrides:
loadFromBuffer in class ICMPHeader
Parameters:
buf - The buffer to read the data from.
offset - The offset to start reading data.
Returns:
The new offset after reading the data.
Throws:
java.lang.IndexOutOfBoundsException - Thrown if there is not sufficent data in the buffer.
java.lang.IllegalArgumentException - Thrown if the ICMP type is not an Timestamp Request.

setOriginateTS

public final void setOriginateTS()
Sets the originate timestamp to the current date in millisecond resolution.

See Also:
Date.getTime()

setOriginateTS

public final void setOriginateTS(int ts)
Sets the originate timestamp to the passed value.

Parameters:
ts - The timestamp in milliseconds

getOriginateTS

public final int getOriginateTS()
Retreives the current timestamp of the reqeust object.

Returns:
The 32-bit timestamp in milliseconds.

toBytes

public final byte[] toBytes()
Converts the object to an array of bytes.

Overrides:
toBytes in class ICMPHeader

OpenNMS API 1.2.3

Generated by eevans on May 29 2005 2015.