Nenad Jovicic / Mbed OS mbed-os-PMK2018_tcp_client

A small example of TCP server over ethernet for mbed-os.

Files at this revision

API Documentation at this revision

Revision 3:48f60b2918aa, committed 2018-05-11

Comitter:
nenad
Date:
Fri May 11 15:40:50 2018 +0000
Parent:
2:e72bc303ea90
Commit message:
PMK2018;

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r e72bc303ea90 -r 48f60b2918aa main.cpp
--- a/main.cpp	Mon Jun 26 09:28:54 2017 +0000
+++ b/main.cpp	Fri May 11 15:40:50 2018 +0000
@@ -1,54 +1,38 @@
-#if !FEATURE_LWIP
-    #error [NOT_SUPPORTED] LWIP not supported for this target
-#endif
-
 #include "mbed.h"
+#include "TCPSocket.h"
 #include "EthernetInterface.h"
-#include "TCPServer.h"
-#include "TCPSocket.h"
 
-#define HTTP_STATUS_LINE "HTTP/1.0 200 OK"
-#define HTTP_HEADER_FIELDS "Content-Type: text/html; charset=utf-8"
-#define HTTP_MESSAGE_BODY ""                                     \
-"<html>" "\r\n"                                                  \
-"  <body style=\"display:flex;text-align:center\">" "\r\n"       \
-"    <div style=\"margin:auto\">" "\r\n"                         \
-"      <h1>Hello World</h1>" "\r\n"                              \
-"      <p>It works !</p>" "\r\n"                                 \
-"    </div>" "\r\n"                                              \
-"  </body>" "\r\n"                                               \
-"</html>"
-
-#define HTTP_RESPONSE HTTP_STATUS_LINE "\r\n"   \
-                      HTTP_HEADER_FIELDS "\r\n" \
-                      "\r\n"                    \
-                      HTTP_MESSAGE_BODY "\r\n"
+EthernetInterface eth;
+TCPSocket socket;
 
 int main()
 {
-    printf("Basic HTTP server example\n");
-    
-    EthernetInterface eth;
+    printf("Basic TCP client example\n");
+
+    // Brings up the network interface
     eth.connect();
-    
-    printf("The target IP address is '%s'\n", eth.get_ip_address());
-    
-    TCPServer srv;
-    TCPSocket clt_sock;
-    SocketAddress clt_addr;
-    
-    /* Open the server on ethernet stack */
-    srv.open(&eth);
-    
-    /* Bind the HTTP port (TCP 80) to the server */
-    srv.bind(eth.get_ip_address(), 80);
-    
-    /* Can handle 5 simultaneous connections */
-    srv.listen(5);
-    
-    while (true) {
-        srv.accept(&clt_sock, &clt_addr);
-        printf("accept %s:%d\n", clt_addr.get_ip_address(), clt_addr.get_port());
-        clt_sock.send(HTTP_RESPONSE, strlen(HTTP_RESPONSE));
-    }
-}
+    const char *ip = eth.get_ip_address();
+    const char *mac = eth.get_mac_address();
+    printf("IP address is: %s\n", ip ? ip : "No IP");
+    printf("MAC address is: %s\n", mac ? mac : "No MAC");
+
+    // Open a socket on the network interface, and create a TCP connection to mbed.org
+    socket.open(&eth);
+    socket.connect("192.168.0.108", 80);
+
+    // Send data
+    char sbuffer[] = "12345";
+    int scount = socket.send(sbuffer, sizeof sbuffer);
+    printf("sent %d [%.*s]\r\n", scount, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
+
+    // Recieve a simple http response and print out the response line
+    char rbuffer[64];
+    int rcount = socket.recv(rbuffer, sizeof rbuffer);
+    printf("recv %d [%.*s]\r\n", rcount, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
+
+    // Close the socket to return its memory and bring down the network interface
+    socket.close();
+    eth.disconnect();
+
+    printf("Done\n");
+}
\ No newline at end of file