mbed official / Mbed 2 deprecated TCPEchoServer

Simple TCP Echo Server

Dependencies:   EthernetInterface mbed-rtos mbed

Dependents:   HTTPDcgi

Legacy Warning

This is an mbed 2 example. To learn more about mbed OS 5, visit the docs.

main.cpp@8:23b1fba109b0, 2017-02-14 (annotated)

Committer:
mbed_official
Date:
Tue Feb 14 16:20:16 2017 +0000
Revision:
8:23b1fba109b0
Parent:
7:a5ead1402704 
Update libraries

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:38cbb854d85f 1 #include "mbed.h"
emilmont 1:5cebe0e38cd2 2 #include "EthernetInterface.h"
mbed_official 8:23b1fba109b0 3
emilmont 3:36fd3cfad85a 4 #define ECHO_SERVER_PORT 7
mbed_official 8:23b1fba109b0 5
emilmont 1:5cebe0e38cd2 6 int main (void) {
emilmont 1:5cebe0e38cd2 7 EthernetInterface eth;
emilmont 1:5cebe0e38cd2 8 eth.init(); //Use DHCP
emilmont 1:5cebe0e38cd2 9 eth.connect();
mbedAustin 7:a5ead1402704 10 printf("\nServer IP Address is %s\n", eth.getIPAddress());
emilmont 1:5cebe0e38cd2 11
emilmont 1:5cebe0e38cd2 12 TCPSocketServer server;
emilmont 3:36fd3cfad85a 13 server.bind(ECHO_SERVER_PORT);
emilmont 3:36fd3cfad85a 14 server.listen();
emilmont 1:5cebe0e38cd2 15
emilmont 1:5cebe0e38cd2 16 while (true) {
emilmont 1:5cebe0e38cd2 17 printf("\nWait for new connection...\n");
emilmont 1:5cebe0e38cd2 18 TCPSocketConnection client;
emilmont 1:5cebe0e38cd2 19 server.accept(client);
emilmont 3:36fd3cfad85a 20 client.set_blocking(false, 1500); // Timeout after (1.5)s
emilmont 1:5cebe0e38cd2 21
emilmont 1:5cebe0e38cd2 22 printf("Connection from: %s\n", client.get_address());
emilmont 1:5cebe0e38cd2 23 char buffer[256];
emilmont 1:5cebe0e38cd2 24 while (true) {
emilmont 3:36fd3cfad85a 25 int n = client.receive(buffer, sizeof(buffer));
emilmont 1:5cebe0e38cd2 26 if (n <= 0) break;
emilmont 1:5cebe0e38cd2 27
mbedAustin 7:a5ead1402704 28 // print received message to terminal
mbedAustin 7:a5ead1402704 29 buffer[n] = '\0';
mbedAustin 7:a5ead1402704 30 printf("Received message from Client :'%s'\n",buffer);
mbedAustin 7:a5ead1402704 31
mbedAustin 7:a5ead1402704 32 // reverse the message
mbedAustin 7:a5ead1402704 33 char temp;
mbedAustin 7:a5ead1402704 34 for(int f = 0, l = n-1; f<l; f++,l--){
mbedAustin 7:a5ead1402704 35 temp = buffer[f];
mbedAustin 7:a5ead1402704 36 buffer[f] = buffer[l];
mbedAustin 7:a5ead1402704 37 buffer[l] = temp;
mbedAustin 7:a5ead1402704 38 }
mbedAustin 7:a5ead1402704 39
mbedAustin 7:a5ead1402704 40 // print reversed message to terminal
mbedAustin 7:a5ead1402704 41 printf("Sending message to Client: '%s'\n",buffer);
mbedAustin 7:a5ead1402704 42
mbedAustin 7:a5ead1402704 43 // Echo received message back to client
emilmont 2:ec5ae99791da 44 client.send_all(buffer, n);
emilmont 1:5cebe0e38cd2 45 if (n <= 0) break;
emilmont 1:5cebe0e38cd2 46 }
emilmont 3:36fd3cfad85a 47
emilmont 1:5cebe0e38cd2 48 client.close();
emilmont 1:5cebe0e38cd2 49 }
emilmont 1:5cebe0e38cd2 50 }
mbed_official 8:23b1fba109b0 51