com.sun.squawk.platform.posix
Class GCFSocketsImpl

java.lang.Object
  com.sun.squawk.platform.posix.GCFSocketsImpl

All Implemented Interfaces:

GCFSockets

public class GCFSocketsImpl
extends Object
implements GCFSockets

POSIX implementation of GCFSockets that calls the BSD socket API.

Field Summary

static boolean	DEBUG
static boolean	NBIO_WORKS

Constructor Summary

GCFSocketsImpl()

Method Summary

int	accept(int fd) Accept client connections on server socket fd.
int	available(int fd) Gets the number of bytes that can be read without blocking.
void	close(int fd) Closes the socket connection.
int	getSockOpt(int socket, int option_name) get a socket option
int	getSockOpt(int socket, int level, int option_name) get a socket option
String	inet_ntop(int in) Takes an IPv4 Internet address and returns string representing the address in `.' notation
int	open(String hostname, int port, int mode) Opens a TCP connection to a server.
int	openServer(int port, int backlog) Opens a server TCP connection to clients.
int	readBuf(int fd, byte[] b, int offset, int length) Reads from the open socket connection.
int	readByte(int fd) Read a byte from the open socket connection.
int	readByte(int fd, byte[] b) Read a byte from the open socket connection.
void	setSockOpt(int socket, int option_name, int option_value) set a socket option
void	setSockOpt(int socket, int level, int option_name, int option_value) set a socket option
int	writeBuf(int fd, byte[] buffer, int off, int len) Writes to the open socket connection.
int	writeByte(int fd, int b) Writes to the open socket connection.

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

public static final boolean DEBUG

See Also:

Constant Field Values

NBIO_WORKS

public static final boolean NBIO_WORKS

See Also:

Constant Field Values

Constructor Detail

GCFSocketsImpl

public GCFSocketsImpl()

Method Detail

open

public int open(String hostname,
                int port,
                int mode)
         throws IOException

Description copied from interface: GCFSockets

Opens a TCP connection to a server.

Specified by:

open in interface GCFSockets

Parameters:

hostname - host name

port - TCP port at host

mode - connection mode (ignored, should be read/write?

Returns:

a native handle to the network connection.

Throws:

IOException

inet_ntop

public String inet_ntop(int in)

Takes an IPv4 Internet address and returns string representing the address in `.' notation

Parameters:

in - the opaque bytes of an IPv4 "struct in_addr"

Returns:

String

openServer

public int openServer(int port,
                      int backlog)
               throws IOException

Opens a server TCP connection to clients. Creates, binds, and listens

Specified by:

openServer in interface GCFSockets

Parameters:

port - local TCP port to listen on

backlog - listen backlog.

Returns:

a native handle to the network connection.

Throws:

IOException

accept

public int accept(int fd)
           throws IOException

Accept client connections on server socket fd. Blocks until a client connects.

Specified by:

accept in interface GCFSockets

Parameters:

fd - open server socket. See openServer(int, int).

Returns:

a native handle to the network connection.

Throws:

IOException

readBuf

public int readBuf(int fd,
                   byte[] b,
                   int offset,
                   int length)
            throws IOException

Description copied from interface: GCFSockets

Reads from the open socket connection.

Specified by:

readBuf in interface GCFSockets

Parameters:

fd - the socket descriptor

b - the buffer into which the data is read.

offset - the start offset in array b at which the data is written.

length - the maximum number of bytes to read.

Returns:

the total number of bytes read into the buffer, or -1 if there is no mo data because the end of the stream has been reached.

Throws:

IOException

readByte

public int readByte(int fd,
                    byte[] b)
             throws IOException

Description copied from interface: GCFSockets

Read a byte from the open socket connection. This function will return an unsigned byte (0-255) if data was read, or -1 if EOF was reached. This version is passed a temporary buffer instead of allocating one.

Specified by:

readByte in interface GCFSockets

Parameters:

fd - the socket descriptor

Returns:

the byte read or -1

Throws:

IOException

readByte

public int readByte(int fd)
             throws IOException

Description copied from interface: GCFSockets

Read a byte from the open socket connection. This function will return an unsigned byte (0-255) if data was read, or -1 if EOF was reached.

Specified by:

readByte in interface GCFSockets

Returns:

the byte read or -1

Throws:

IOException

writeBuf

public int writeBuf(int fd,
                    byte[] buffer,
                    int off,
                    int len)
             throws IOException

Description copied from interface: GCFSockets

Writes to the open socket connection.

Specified by:

writeBuf in interface GCFSockets

Parameters:

fd - the socket descriptor

buffer - the buffer of the data to write

off - the start offset in array b at which the data is written.

len - the number of bytes to write.

Returns:

the total number of bytes written

Throws:

IOException

writeByte

public int writeByte(int fd,
                     int b)
              throws IOException

Description copied from interface: GCFSockets

Writes to the open socket connection.

Specified by:

writeByte in interface GCFSockets

Parameters:

fd - the socket descriptor

b - the byte to write

Returns:

the total number of bytes written

Throws:

IOException

available

public int available(int fd)
              throws IOException

Description copied from interface: GCFSockets

Gets the number of bytes that can be read without blocking.

Specified by:

available in interface GCFSockets

Parameters:

fd - the socket descriptor

Returns:

number of bytes that can be read without blocking

Throws:

IOException

close

public void close(int fd)
           throws IOException

Description copied from interface: GCFSockets

Closes the socket connection.

Specified by:

close in interface GCFSockets

Parameters:

fd - the socket descriptor

Throws:

IOException

setSockOpt

public void setSockOpt(int socket,
                       int level,
                       int option_name,
                       int option_value)
                throws IOException

set a socket option

Parameters:

socket - socket descriptor

level - Socket.SOL_SOCKET, etc.

option_name -

option_value - new value

Throws:

IOException - on error

getSockOpt

public int getSockOpt(int socket,
                      int level,
                      int option_name)
               throws IOException

get a socket option

Parameters:

socket - socket descriptor

level - Socket.SOL_SOCKET, etc.

option_name -

Returns:

socket option value

Throws:

IOException - on error

setSockOpt

public void setSockOpt(int socket,
                       int option_name,
                       int option_value)
                throws IOException

set a socket option

Specified by:

setSockOpt in interface GCFSockets

Parameters:

socket - socket descriptor

option_name -

option_value - new value

Throws:

IOException - on error

getSockOpt

public int getSockOpt(int socket,
                      int option_name)
               throws IOException

get a socket option

Specified by:

getSockOpt in interface GCFSockets

Parameters:

socket - socket descriptor

option_name -

Returns:

option value

Throws:

IOException - on error