public final class TFTPAckPacket extends TFTPPacket
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.
TFTPPacket
,
TFTPPacketException
,
TFTP
Modifier and Type | Field and Description |
---|---|
(package private) int |
_blockNumber
The block number being acknowledged by the packet.
|
_address, _port, _type, ACKNOWLEDGEMENT, DATA, ERROR, MIN_PACKET_SIZE, READ_REQUEST, SEGMENT_SIZE, WRITE_REQUEST
Constructor and Description |
---|
TFTPAckPacket(java.net.DatagramPacket datagram)
Creates an acknowledgement packet based from a received
datagram.
|
TFTPAckPacket(java.net.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.
|
Modifier and Type | Method and Description |
---|---|
(package private) java.net.DatagramPacket |
_newDatagram(java.net.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.
|
java.net.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.
|
java.lang.String |
toString()
For debugging
|
getAddress, getPort, getType, newTFTPPacket, setAddress, setPort
public TFTPAckPacket(java.net.InetAddress destination, int port, int blockNumber)
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.TFTPAckPacket(java.net.DatagramPacket datagram) throws TFTPPacketException
datagram
- The datagram containing the received acknowledgement.TFTPPacketException
- If the datagram isn't a valid TFTP
acknowledgement packet.java.net.DatagramPacket _newDatagram(java.net.DatagramPacket datagram, byte[] data)
_newDatagram
in class TFTPPacket
datagram
- The datagram to create.data
- The buffer to store the packet and to use in the datagram.public java.net.DatagramPacket newDatagram()
TFTPClient
class. Under normal circumstances, you should not have a need to call this
method.newDatagram
in class TFTPPacket
public int getBlockNumber()
public void setBlockNumber(int blockNumber)
blockNumber
- the number to setpublic java.lang.String toString()
toString
in class TFTPPacket