Diff: main.cpp

Revision:

26:897777a5ee04

Parent:

25:1a4f620b7af6

Child:

27:e06564324551

--- a/main.cpp	Wed Oct 02 08:34:02 2013 +0000
+++ b/main.cpp	Thu Oct 03 02:38:29 2013 +0000
@@ -1,8 +1,8 @@
 /**
  * @file
- * TCP client socket sample.<br/>
- * This program is to test of TCP client.
- * Connect to a TCP server, and send back the received data as is.
+ * Udpsocket sample.<br/>
+ * This program is to test of UDP socket.
+ * The program send a echo back packet when receive a packet.
  * 
  */
 #include "mbed.h"
@@ -32,51 +32,49 @@
     cfg.setGateway(192,168,128,254);    
 
 
-    // Create tcp socket with 512 bytes RX buffer.
+    // Create tcp socket with 512 bytes RX buffer.(This size same as maximum size of receiveable UDP packet)
     // Socket must create between "net.start" with "new Net()"
-    TcpSocket socket(512);
+    // If you want to receive data without buffering, please email to MiMic project.
+    UdpSocket socket(1234,512);
     
     //Start network
     net->start(cfg);
 
 
-    led1=1;    
+    led1=1;
     for(;;){
-        //connect to server
-        if(!socket.connect(IpAddr(192,168,128,195),1234)){
-            Thread::wait(1000);
-        }
-        //connected!
+        //wait for packet
+        IpAddr peer_host;
+        unsigned short port;
+        const void* rx;
+        //get packet pointer and peer info.
         led2=1;
-        for(;;){
-            led4=0;
-            led3=1;
-            //wait for data...
-            const void* rx;
-            //get read pointer
-            int l=socket.precv(rx);
-            if(l<0){
-                break;
-            }
-            if(l==0){
-                //timeout
-            }else{
-                //ok,echo back data.
-                led4=1;
-                //send data
-                if(!socket.send(rx,l)){
-                    break;
-                }
-                //move read pointer.
-                socket.pseek(l);
-            }
+        int l=socket.precvfrom(rx,&peer_host,&port);
+        if(l<0){
+            //Error
+            led2=0;
+            break;
+        }
+        if(l==0){
+            //timeout
+            led2=0;
+            continue;
+        }
+        led3=1;
+        if(!socket.sendTo(peer_host,port,rx,l)){
+            //Error
+            led2=0;
             led3=0;
+            led4=1;
+            break;
         }
+        Thread::wait(100);//show LED blinking!
+        //move to next packet
+        socket.precvnext();
         led2=0;
         led3=0;
-        led4=0;
-        socket.close(); //close the socket.
     }
+    led1=0;
     return 0;
 }