Diff: main.cpp

Revision:

1:ea9223739b1b

Parent:

0:02f8a386a4ae

Child:

2:97a6b36f2bc9

--- a/main.cpp	Mon Oct 16 02:20:05 2017 +0000
+++ b/main.cpp	Tue Oct 12 06:49:09 2021 +0000
@@ -1,14 +1,60 @@
-// Print "Hello World" to the PC
-
-#include "mbed.h"
-
-Serial pc(USBTX, USBRX);
-
-int main() {
-    pc.baud(115200);
-    
-    
-    
-    pc.printf("Hello World\n");
-    
-}
+#include "mbed.h"
+#include "EthernetInterface.h"
+
+#define ECHO_SERVER_PORT   23
+
+Serial pc(USBTX, USBRX);
+
+int main (void) 
+{
+    pc.baud(115200);
+    
+    pc.printf("Hello World\n");    
+    pc.printf("Wait a second...\r\n");
+    
+    uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0x00, 0x01, 0x02}; 
+    EthernetInterface eth;
+    eth.init(mac_addr); //Use DHCP
+    eth.connect();
+    pc.printf("Server IP Address is %s\r\n", eth.getIPAddress());
+    
+    TCPSocketServer server;
+    server.bind(ECHO_SERVER_PORT);
+    server.listen();
+    
+    while (true) 
+    {
+        pc.printf("Wait for new connection...\r\n");
+        TCPSocketConnection client;
+        server.accept(client);
+        client.set_blocking(false, 15000); // Timeout after (1.5)s
+        
+        pc.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;
+            
+            // print received message to terminal
+            buffer[n] = '\0';
+            pc.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;
+                }
+            
+            // print reversed message to terminal
+            pc.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();
+    }
+}
+