wifi

Class LinkLayer

java.lang.Object

wifi.LinkLayer

All Implemented Interfaces:

Dot11Interface

public class LinkLayer
extends java.lang.Object
implements Dot11Interface

Use this layer as a starting point for your project code. See Dot11Interface for more details on these routines.

Author:

richards

Constructor Summary

Constructors

Constructor and Description
LinkLayer(short ourMAC, java.io.PrintWriter output) Constructor takes a MAC address and the PrintWriter to which our output will be written.

Method Summary

Modifier and Type	Method and Description
int	command(int cmd, int val) Passes command info to your link layer.
int	recv(Transmission t) Recv method blocks until data arrives, then writes it an address info into the Transmission object.
int	send(short dest, byte[] data, int len) Send method takes a destination, a buffer (array) of data, and the number of bytes to send.
int	status() Returns a current status code.

Methods inherited from class java.lang.Object

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

Constructor Detail

LinkLayer

public LinkLayer(short ourMAC,
                 java.io.PrintWriter output)

Constructor takes a MAC address and the PrintWriter to which our output will be written.

Parameters:

ourMAC - MAC address

output - Output stream associated with GUI

Method Detail

send

public int send(short dest,
                byte[] data,
                int len)

Send method takes a destination, a buffer (array) of data, and the number of bytes to send. See docs for full description.

Specified by:

send in interface Dot11Interface

Parameters:

dest - MAC address to which data should be sent

data - Buffer containing data

len - Number of bytes of data to send

Returns:

The number of bytes accepted for transmission, or -1 on error.

recv

public int recv(Transmission t)

Recv method blocks until data arrives, then writes it an address info into the Transmission object. See docs for full description.

Specified by:

recv in interface Dot11Interface

Parameters:

t - A Transmission instance to which the incoming data and address information is written.

Returns:

The number of bytes received, or -1 on error.

status

public int status()

Returns a current status code. See docs for full description.

Specified by:

status in interface Dot11Interface

Returns:

Status code

command

public int command(int cmd,
                   int val)

Passes command info to your link layer. See docs for full description.

Specified by:

command in interface Dot11Interface

Parameters:

cmd - Specifies the command to send

val - The value passed with the command

Returns:

Response from the command