org.apache.commons.net.tftp
Class TFTPAckPacket
public final class TFTPAckPacket
A final class derived from TFTPPacket definiing the TFTP Acknowledgement
packet type.
Details regarding the TFTP protocol and the format of TFTP packets can
be found in RFC 783. But the point of these classes is to keep you
from having to worry about the internals. Additionally, only very
few people should have to care about any of the TFTPPacket classes
or derived classes. Almost all users should only be concerned with the
TFTPClient class
receiveFile()
and
sendFile()
methods.
- Daniel F. Savarese
TFTPPacket
, TFTPPacketException
, TFTP
(package private) int | _blockNumber - The block number being acknowledged by the packet.
|
TFTPAckPacket(DatagramPacket datagram) -
Creates an acknowledgement packet based from a received
datagram.
|
TFTPAckPacket(InetAddress destination, int port, int blockNumber) -
Creates an acknowledgment packet to be sent to a host at a given port
acknowledging receipt of a block.
|
(package private) DatagramPacket | _newDatagram(DatagramPacket datagram, byte[] data) -
This is a method only available within the package for
implementing efficient datagram transport by elminating buffering.
|
int | getBlockNumber() -
Returns the block number of the acknowledgement.
|
DatagramPacket | newDatagram() -
Creates a UDP datagram containing all the TFTP
acknowledgement packet data in the proper format.
|
void | setBlockNumber(int blockNumber) - Sets the block number of the acknowledgement.
|
_blockNumber
(package private) int _blockNumber
The block number being acknowledged by the packet. **
TFTPAckPacket
(package private) TFTPAckPacket(DatagramPacket datagram)
throws TFTPPacketException
Creates an acknowledgement packet based from a received
datagram. Assumes the datagram is at least length 4, else an
ArrayIndexOutOfBoundsException may be thrown.
datagram
- The datagram containing the received acknowledgement.
TFTPPacketException
- If the datagram isn't a valid TFTP
acknowledgement packet.
TFTPAckPacket
public TFTPAckPacket(InetAddress destination,
int port,
int blockNumber)
Creates an acknowledgment packet to be sent to a host at a given port
acknowledging receipt of a block.
destination
- The host to which the packet is going to be sent.port
- The port to which the packet is going to be sent.blockNumber
- The block number being acknowledged.
_newDatagram
(package private) DatagramPacket _newDatagram(DatagramPacket datagram,
byte[] data)
This is a method only available within the package for
implementing efficient datagram transport by elminating buffering.
It takes a datagram as an argument, and a byte buffer in which
to store the raw datagram data. Inside the method, the data
is set as the datagram's data and the datagram returned.
- _newDatagram in interface TFTPPacket
datagram
- The datagram to create.data
- The buffer to store the packet and to use in the datagram.
- The datagram argument.
getBlockNumber
public int getBlockNumber()
Returns the block number of the acknowledgement.
- The block number of the acknowledgement.
newDatagram
public DatagramPacket newDatagram()
Creates a UDP datagram containing all the TFTP
acknowledgement packet data in the proper format.
This is a method exposed to the programmer in case he
wants to implement his own TFTP client instead of using
the
TFTPClient
class. Under normal circumstances, you should not have a need to call this
method.
- newDatagram in interface TFTPPacket
- A UDP datagram containing the TFTP acknowledgement packet.
setBlockNumber
public void setBlockNumber(int blockNumber)
Sets the block number of the acknowledgement. **