EthernetGateway added. Removed usage of string class i Gateway code (reduced program memroy by 2k). FIxed potential problem in Dallas sensor example sketch.

libraries/UIPEthernet/tests/perl/tcpclient.pl

@@ -0,0 +1,34 @@
+#!/usr/bin/perl
+#tcpclient.pl
+
+use IO::Socket::INET;
+
+# flush after every write
+$| = 1;
+
+my ($socket,$client_socket);
+
+# creating object interface of IO::Socket::INET modules which internally creates
+# socket, binds and connects to the TCP server running on the specific port.
+$socket = new IO::Socket::INET (
+PeerHost => '192.168.0.6',
+PeerPort => '1000',
+Proto => 'tcp',
+) or die "ERROR in Socket Creation : $!\n";
+
+print "TCP Connection Success.\n";
+
+# write on the socket to server.
+$data = "DATA from Client";
+print $socket "$data\n";
+# we can also send the data through IO::Socket::INET module,
+# $socket->send($data);
+
+# read the socket data sent by server.
+$data = <$socket>;
+# we can also read from socket through recv()  in IO::Socket::INET
+# $socket->recv($data,1024);
+print "Received from Server : $data\n";
+
+sleep (10);
+$socket->close();

libraries/UIPEthernet/tests/perl/tcpserver.pl

@@ -0,0 +1,53 @@
+#!/usr/bin/perl
+#tcpserver.pl
+
+use IO::Socket::INET;
+
+# flush after every write
+$| = 1;
+
+my ($socket,$client_socket);
+my ($peeraddress,$peerport);
+
+# creating object interface of IO::Socket::INET modules which internally does
+# socket creation, binding and listening at the specified port address.
+$socket = new IO::Socket::INET (
+LocalHost => '192.168.0.1',
+LocalPort => '5000',
+Proto => 'tcp',
+Listen => 5,
+Reuse => 1
+) or die "ERROR in Socket Creation : $!\n";
+
+print "SERVER Waiting for client connection on port 5000\n";
+
+while(1)
+{
+	# waiting for new client connection.
+	$client_socket = $socket->accept();
+	
+	# get the host and port number of newly connected client.
+	$peer_address = $client_socket->peerhost();
+	$peer_port = $client_socket->peerport();
+	
+	print "Accepted New Client Connection From : $peer_address, $peer_port\n ";
+	
+	# read operation on the newly accepted client
+	$data = <$client_socket>;
+	# we can also read from socket through recv()  in IO::Socket::INET
+	# $client_socket->recv($data,1024);
+	print "Received from Client : $data\n";
+	
+	# write operation on the newly accepted client.
+	$data = "DATA from Server";
+	print $client_socket "$data\n";
+	# we can also send the data through IO::Socket::INET module,
+	# $client_socket->send($data);
+	
+	sleep(1);
+	
+	$client_socket->close();
+}
+
+$socket->close();
+

libraries/UIPEthernet/tests/perl/udpclient.pl

@@ -0,0 +1,26 @@
+#!/usr/bin/perl
+#udpclient.pl
+
+use IO::Socket::INET;
+
+# flush after every write
+$| = 1;
+
+my ($socket,$data);
+
+#  We call IO::Socket::INET->new() to create the UDP Socket
+# and bind with the PeerAddr.
+$socket = new IO::Socket::INET (
+PeerAddr   => '192.168.0.6:5000',
+Proto        => 'udp'
+) or die "ERROR in Socket Creation : $!\n";
+#send operation
+$data = "data from client";
+$socket->send($data);
+
+#read operation
+$data = <$socket>;
+print "Data received from socket : $data\n ";
+
+sleep(10);
+$socket->close();

libraries/UIPEthernet/tests/perl/udpserver.pl

@@ -0,0 +1,40 @@
+#!/usr/bin/perl
+#udpserver.pl
+
+use IO::Socket::INET;
+
+# flush after every write
+$| = 1;
+
+my ($socket,$received_data);
+my ($peeraddress,$peerport);
+
+#  we call IO::Socket::INET->new() to create the UDP Socket and bound
+# to specific port number mentioned in LocalPort and there is no need to provide
+# LocalAddr explicitly as in TCPServer.
+$socket = new IO::Socket::INET (
+LocalPort => '5000',
+Proto => 'udp',
+) or die "ERROR in Socket Creation : $!\n";
+
+while(1)
+{
+# read operation on the socket
+$socket->recv($recieved_data,1024);
+
+#get the peerhost and peerport at which the recent data received.
+$peer_address = $socket->peerhost();
+$peer_port = $socket->peerport();
+print "($peer_address , $peer_port) said : $recieved_data\n";
+
+#send the data to the client at which the read/write operations done recently.
+$data = "data from server\n";
+
+$socket->send($data);
+
+print $socket "$data";
+
+}
+
+$socket->close();
+