File content as of revision 0:337d7fbe5920:

#include "mbed.h"
#include "EthernetInterface.h"

#define ECHO_SERVER_PORT   7


int main (void) 
{
    DigitalOut myled(LED1);
    printf("Wait a second...\r\n");
    //uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0x00, 0x01, 0x02}; 
    static const char*          mbedIp       = "192.168.64.232";  //IP
    static const char*          mbedMask     = "255.255.255.0";  // Mask
    static const char*          mbedGateway  = "192.168.64.1";    //Gateway
 
    EthernetInterface eth;
    eth.init(mbedIp, mbedMask, mbedGateway); //Use DHCP
    eth.connect();
    //printf("Server IP Address is %s\r\n", eth.getIPAddress());
    
    TCPSocketServer server;
    server.bind(ECHO_SERVER_PORT);
    server.listen();
    
    while (true) 
    {
        //printf("Wait for new connection...\r\n");
        TCPSocketConnection client;
        server.accept(client);
        client.set_blocking(false, 15000); // Timeout after (1.5)s
        
        //printf("Connection from: %s\r\n", client.get_address());
        char buffer[256];
        while (true) {
            int n = client.receive(buffer, sizeof(buffer));
            if (n <= 0) break;
            
            if(buffer[0]=='Y'){
                myled=1;
            }else{
                myled=0;
            }
            // print received message to terminal
            //buffer[n] = '\0';
            //printf("Received message from Client :'%s'\r\n",buffer);
            
            // reverse the message
            //char temp;
//            for(int f = 0, l = n-1; f<l; f++,l--){
//                temp = buffer[f];
//                buffer[f] = buffer[l];
//                buffer[l] = temp;
//                }
            sprintf(buffer, "Hi Alisha.How are u?");
            // print reversed message to terminal
            //printf("Sending message to Client: '%s'\r\n",buffer);
            
            // Echo received message back to client
            client.send_all(buffer, n);
            if (n <= 0) break;
        }
        
        client.close();
    }
    
}