Jan Kamidra / Mbed OS TCP_EchoServer

Example for TCPSocket as EchoServer

main.cpp@0:633c10a3bb5d, 2020-05-08 (annotated)

Committer:
JohnnyK
Date:
Fri May 08 18:47:52 2020 +0000
Revision:
0:633c10a3bb5d
Child:
1:8c10d8f4e3aa
First

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JohnnyK 0:633c10a3bb5d 1 #include "mbed.h" //MbedOS 5.15
JohnnyK 0:633c10a3bb5d 2 #include "EthernetInterface.h"
JohnnyK 0:633c10a3bb5d 3
JohnnyK 0:633c10a3bb5d 4 #define ROUTER // commented = Static IP uncomented = address assigned by router
JohnnyK 0:633c10a3bb5d 5 #ifndef ROUTER
JohnnyK 0:633c10a3bb5d 6 #define IP "192.168.1.1" //Here place your static IP of Mbed
JohnnyK 0:633c10a3bb5d 7 #define GATEWAY "0.0.0.0"
JohnnyK 0:633c10a3bb5d 8 #define MASK "255.255.255.0"
JohnnyK 0:633c10a3bb5d 9 #endif
JohnnyK 0:633c10a3bb5d 10 #define PORT 20
JohnnyK 0:633c10a3bb5d 11
JohnnyK 0:633c10a3bb5d 12 DigitalOut led1(LED1);
JohnnyK 0:633c10a3bb5d 13
JohnnyK 0:633c10a3bb5d 14 EthernetInterface eth;
JohnnyK 0:633c10a3bb5d 15 TCPSocket server;
JohnnyK 0:633c10a3bb5d 16 TCPSocket* client;
JohnnyK 0:633c10a3bb5d 17 SocketAddress clientAddress;
JohnnyK 0:633c10a3bb5d 18
JohnnyK 0:633c10a3bb5d 19 int main (void){
JohnnyK 0:633c10a3bb5d 20 printf("TCP Echo starting...\n");
JohnnyK 0:633c10a3bb5d 21 int eth_stat;
JohnnyK 0:633c10a3bb5d 22 #ifndef ROUTER
JohnnyK 0:633c10a3bb5d 23 eth.disconnect();
JohnnyK 0:633c10a3bb5d 24 eth_stat = eth.set_network((SocketAddress)IP,(SocketAddress)MASK,(SocketAddress)GATEWAY);
JohnnyK 0:633c10a3bb5d 25 printf("set IP status: %i\n",eth_stat);
JohnnyK 0:633c10a3bb5d 26 #endif
JohnnyK 0:633c10a3bb5d 27 eth_stat = eth.connect();
JohnnyK 0:633c10a3bb5d 28 printf("connect status: %i\n",eth_stat);
JohnnyK 0:633c10a3bb5d 29
JohnnyK 0:633c10a3bb5d 30 SocketAddress ip;
JohnnyK 0:633c10a3bb5d 31 eth.get_ip_address(&ip);
JohnnyK 0:633c10a3bb5d 32 const char *p_ip = ip.get_ip_address();
JohnnyK 0:633c10a3bb5d 33 printf("IP address: %s and Port: %d\n", p_ip ? p_ip : "None" , PORT );
JohnnyK 0:633c10a3bb5d 34 SocketAddress mask;
JohnnyK 0:633c10a3bb5d 35 eth.get_netmask(&mask);
JohnnyK 0:633c10a3bb5d 36 const char *p_mask = mask.get_ip_address();
JohnnyK 0:633c10a3bb5d 37 printf("Netmask: %s\n", p_mask ? p_mask : "None");
JohnnyK 0:633c10a3bb5d 38 SocketAddress gateway;
JohnnyK 0:633c10a3bb5d 39 eth.get_gateway(&gateway);
JohnnyK 0:633c10a3bb5d 40 const char *p_gateway = gateway.get_ip_address();
JohnnyK 0:633c10a3bb5d 41 printf("Gateway: %s\n", p_gateway ? p_gateway : "None");
JohnnyK 0:633c10a3bb5d 42
JohnnyK 0:633c10a3bb5d 43 if(ip){
JohnnyK 0:633c10a3bb5d 44 server.open(&eth);
JohnnyK 0:633c10a3bb5d 45 server.bind(PORT);
JohnnyK 0:633c10a3bb5d 46 server.listen(1);
JohnnyK 0:633c10a3bb5d 47 while (1) {
JohnnyK 0:633c10a3bb5d 48 printf("Server bound and listening\n");
JohnnyK 0:633c10a3bb5d 49 client = server.accept();
JohnnyK 0:633c10a3bb5d 50
JohnnyK 0:633c10a3bb5d 51 client->getpeername(&clientAddress);
JohnnyK 0:633c10a3bb5d 52 const char *p_clientAddress = clientAddress.get_ip_address();
JohnnyK 0:633c10a3bb5d 53 printf("Client connected from IP address: %s\n", p_clientAddress ? p_clientAddress : "None");
JohnnyK 0:633c10a3bb5d 54
JohnnyK 0:633c10a3bb5d 55 bool b = true;
JohnnyK 0:633c10a3bb5d 56 while (b) {
JohnnyK 0:633c10a3bb5d 57 char in_buffer[100];
JohnnyK 0:633c10a3bb5d 58 int n = client->recv(in_buffer, sizeof(in_buffer));
JohnnyK 0:633c10a3bb5d 59 if (n == 0) {
JohnnyK 0:633c10a3bb5d 60 printf("Client disconnected\n");
JohnnyK 0:633c10a3bb5d 61 b = false;
JohnnyK 0:633c10a3bb5d 62 }else{
JohnnyK 0:633c10a3bb5d 63 printf("Received message from Client :'%s'\n", in_buffer);
JohnnyK 0:633c10a3bb5d 64 char out_buffer[100];
JohnnyK 0:633c10a3bb5d 65 n = sprintf(out_buffer,"Echo - %s", in_buffer);
JohnnyK 0:633c10a3bb5d 66
JohnnyK 0:633c10a3bb5d 67 printf("Sending echo to client\n");
JohnnyK 0:633c10a3bb5d 68 client->send(out_buffer, n);
JohnnyK 0:633c10a3bb5d 69 led1 =! led1;
JohnnyK 0:633c10a3bb5d 70 }
JohnnyK 0:633c10a3bb5d 71 led1 =! led1;
JohnnyK 0:633c10a3bb5d 72 }
JohnnyK 0:633c10a3bb5d 73 client->close();
JohnnyK 0:633c10a3bb5d 74 }
JohnnyK 0:633c10a3bb5d 75 }else{
JohnnyK 0:633c10a3bb5d 76 printf("No IP\n");
JohnnyK 0:633c10a3bb5d 77 eth.disconnect();
JohnnyK 0:633c10a3bb5d 78 printf("Program end\n");
JohnnyK 0:633c10a3bb5d 79 }
JohnnyK 0:633c10a3bb5d 80 }