AkashiRobo / Mbed OS mbed-tcp-example

tcp example

main.cpp@0:4e0f31b64b24, 2022-01-19 (annotated)

Committer:
minamikawa
Date:
Wed Jan 19 08:31:23 2022 +0000
Revision:
0:4e0f31b64b24
first_commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
minamikawa 0:4e0f31b64b24 1
minamikawa 0:4e0f31b64b24 2
minamikawa 0:4e0f31b64b24 3 #include "mbed.h" //MbedOS 5.15
minamikawa 0:4e0f31b64b24 4 #include "EthernetInterface.h"
minamikawa 0:4e0f31b64b24 5
minamikawa 0:4e0f31b64b24 6 #define BUFFSIZE 50
minamikawa 0:4e0f31b64b24 7
minamikawa 0:4e0f31b64b24 8 #define PORT 80
minamikawa 0:4e0f31b64b24 9
minamikawa 0:4e0f31b64b24 10 DigitalOut led1(LED1);
minamikawa 0:4e0f31b64b24 11
minamikawa 0:4e0f31b64b24 12 EthernetInterface net;
minamikawa 0:4e0f31b64b24 13 TCPSocket server;
minamikawa 0:4e0f31b64b24 14 TCPSocket* client;
minamikawa 0:4e0f31b64b24 15 SocketAddress clientAddress;
minamikawa 0:4e0f31b64b24 16
minamikawa 0:4e0f31b64b24 17 char *in_buffer;
minamikawa 0:4e0f31b64b24 18 char *out_buffer;
minamikawa 0:4e0f31b64b24 19
minamikawa 0:4e0f31b64b24 20 static const char* mbedIP = "192.168.0.32"; //IP
minamikawa 0:4e0f31b64b24 21 static const char* mbedMask = "255.255.255.0"; // Mask
minamikawa 0:4e0f31b64b24 22 static const char* mbedGateway = "192.168.0.0"; //Gateway
minamikawa 0:4e0f31b64b24 23
minamikawa 0:4e0f31b64b24 24
minamikawa 0:4e0f31b64b24 25 int main (void){
minamikawa 0:4e0f31b64b24 26 printf("TCP Echo starting...\n");
minamikawa 0:4e0f31b64b24 27 int net_stat;
minamikawa 0:4e0f31b64b24 28 //#ifndef ROUTER
minamikawa 0:4e0f31b64b24 29 net.disconnect();
minamikawa 0:4e0f31b64b24 30 net_stat = net.set_network(mbedIP,mbedMask,mbedGateway); //set ip, mask, gateway to net
minamikawa 0:4e0f31b64b24 31 printf("set IP status: %i\n",net_stat);
minamikawa 0:4e0f31b64b24 32 //#endif
minamikawa 0:4e0f31b64b24 33 net_stat = net.connect(); //connect to network
minamikawa 0:4e0f31b64b24 34 printf("connect status: %i\n",net_stat);
minamikawa 0:4e0f31b64b24 35
minamikawa 0:4e0f31b64b24 36 SocketAddress ip; //make socket for local ip address
minamikawa 0:4e0f31b64b24 37 net.get_ip_address(&ip); //get a info from net
minamikawa 0:4e0f31b64b24 38 const char *p_ip = ip.get_ip_address();
minamikawa 0:4e0f31b64b24 39 printf("IP address: %s and Port: %d\n", p_ip ? p_ip : "None" , PORT );
minamikawa 0:4e0f31b64b24 40 SocketAddress mask;
minamikawa 0:4e0f31b64b24 41 net.get_netmask(&mask);
minamikawa 0:4e0f31b64b24 42 const char *p_mask = mask.get_ip_address();
minamikawa 0:4e0f31b64b24 43 printf("Netmask: %s\n", p_mask ? p_mask : "None");
minamikawa 0:4e0f31b64b24 44 SocketAddress gateway;
minamikawa 0:4e0f31b64b24 45 net.get_gateway(&gateway);
minamikawa 0:4e0f31b64b24 46 const char *p_gateway = gateway.get_ip_address();
minamikawa 0:4e0f31b64b24 47 printf("Gateway: %s\n", p_gateway ? p_gateway : "None");
minamikawa 0:4e0f31b64b24 48
minamikawa 0:4e0f31b64b24 49 if(ip){
minamikawa 0:4e0f31b64b24 50 server.open(&net); //open a network socket using info of net
minamikawa 0:4e0f31b64b24 51 server.bind(PORT); //bind the socket to a port which receive data
minamikawa 0:4e0f31b64b24 52 server.listen(1); //prepare for incoming connections
minamikawa 0:4e0f31b64b24 53 while (1) {
minamikawa 0:4e0f31b64b24 54
minamikawa 0:4e0f31b64b24 55 printf("Server bound and listening\n");
minamikawa 0:4e0f31b64b24 56 client = server.accept(); //wait until connection has done
minamikawa 0:4e0f31b64b24 57 client->set_blocking(false);
minamikawa 0:4e0f31b64b24 58 client->getpeername(&clientAddress);
minamikawa 0:4e0f31b64b24 59 const char *p_clientAddress = clientAddress.get_ip_address();
minamikawa 0:4e0f31b64b24 60 printf("Client connected from IP address: %s\n", p_clientAddress ? p_clientAddress : "None");
minamikawa 0:4e0f31b64b24 61
minamikawa 0:4e0f31b64b24 62 bool b = true;
minamikawa 0:4e0f31b64b24 63 while (b) {
minamikawa 0:4e0f31b64b24 64 in_buffer = new char[BUFFSIZE];
minamikawa 0:4e0f31b64b24 65 int n = client->recv(in_buffer, BUFFSIZE);
minamikawa 0:4e0f31b64b24 66
minamikawa 0:4e0f31b64b24 67 printf("%d\n", n);
minamikawa 0:4e0f31b64b24 68
minamikawa 0:4e0f31b64b24 69 if (n == 0) {
minamikawa 0:4e0f31b64b24 70 printf("Client disconnected\n");
minamikawa 0:4e0f31b64b24 71 b = false;
minamikawa 0:4e0f31b64b24 72 }else if(n == NSAPI_ERROR_WOULD_BLOCK){
minamikawa 0:4e0f31b64b24 73 //printf("data is not here\n");
minamikawa 0:4e0f31b64b24 74 }else{
minamikawa 0:4e0f31b64b24 75 in_buffer[n] = '\0';
minamikawa 0:4e0f31b64b24 76 printf("Received message from Client :'%s'\n", in_buffer);
minamikawa 0:4e0f31b64b24 77 out_buffer = new char[BUFFSIZE];
minamikawa 0:4e0f31b64b24 78 n = sprintf(out_buffer,"Echo - %s", in_buffer);
minamikawa 0:4e0f31b64b24 79
minamikawa 0:4e0f31b64b24 80 printf("Sending echo to client\n");
minamikawa 0:4e0f31b64b24 81 //client->send(out_buffer, n);
minamikawa 0:4e0f31b64b24 82 led1 =! led1;
minamikawa 0:4e0f31b64b24 83 delete []out_buffer;
minamikawa 0:4e0f31b64b24 84 }
minamikawa 0:4e0f31b64b24 85 led1 =! led1;
minamikawa 0:4e0f31b64b24 86 delete []in_buffer;
minamikawa 0:4e0f31b64b24 87 wait_us(10000);
minamikawa 0:4e0f31b64b24 88 }
minamikawa 0:4e0f31b64b24 89 client->close();
minamikawa 0:4e0f31b64b24 90 }
minamikawa 0:4e0f31b64b24 91 }else{
minamikawa 0:4e0f31b64b24 92 printf("No IP\n");
minamikawa 0:4e0f31b64b24 93 net.disconnect();
minamikawa 0:4e0f31b64b24 94 printf("Program end\n");
minamikawa 0:4e0f31b64b24 95 }
minamikawa 0:4e0f31b64b24 96 }