Tizen Developers

Hi Joel,

I've implemented a Java socket server on a mac  (sierra 10.12) 

I also ran the socket client code as a separate program on a different computer and established the connection, which worked fine. So I'm clueless what's going on. Also the connect() method returns just -1, So couldn't understand the exact problem.  

Sorry to disappear. I was dealing with another problem that had me reinstalling my OS several times. Things are back in a stable state where I can develop again. 

I went and blindly wrote something and then compared it to what you have.  It doesn't look that much different. On the Tizen side I have this. 

void  socketConnect(appdata_s* ad, const char* address)
{
	struct sockaddr_in server;
	int socket_desc = socket(AF_INET , SOCK_STREAM , 0);
	if (socket_desc == -1)
	{
		dlog_print(DLOG_DEBUG, "socketstream", "Could not create socket");
	}
	server.sin_addr.s_addr = inet_addr(address);
	server.sin_family = AF_INET;
	server.sin_port = htons( COMM_PORT );
	int connectResult ;
	if ((connectResult = connect(socket_desc , (struct sockaddr *)&server , sizeof(server))) < 0)
	{
		dlog_print(DLOG_DEBUG, "socketstream", "connect error");
		return;
	}
	else
	{
		ad->socket_desc = socket_desc;
		const char* connectedMessage = "connected to server\n\r";
		sendSensorMessage(ad, connectedMessage, strlen(connectedMessage));
	}
}

void sendSensorMessage(appdata_s* ad, const char * message, unsigned int length)
{
	int result = send(ad->socket_desc, message, length, 0);
	if(result << 0)
	{
		dlog_print(DLOG_DEBUG, "socketstream", "data failed to send");
	}
}

On the Java side I put together something that would just let me know if I got a connection.

import java.io.IOException;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;


public class SensorServer {
	public static void main(String[] args) throws IOException {
	        ServerSocket listener = new ServerSocket(6789);
	        try {
	            while (true) {
	            System.out.println("Listening...");
	                Socket socket = listener.accept();
	                System.out.println("Connect received.");
	                try {
	                System.out.println(new Date().toString());
	                BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
	                while(true) {
        				System.out.println(input.readLine());
        			}
	                    
	                } finally {
	                    socket.close();
	                }
	            }
	        }
	        finally {
	            listener.close();
	    }
	}
};

Running this with the emulator it runs fine. I'd suggest first making sure that communication can be achieved to your server. Try opening a browser and typing in the address and port number as something like http://192.168.43.184:1234 (replacing 1234 with your actual port number). The browser might show an error but your server should get the HTTP request to output.  If that doesn't work then it could be a firewall issue. 

Something else came to mind last night. I was working on an app that specifically needed to communicate through the WiFi connection. I had to use the connection manager API to select the profile for the WiFi network so that communication was routed that way.