Socket.md

Socket

UDP

• server

    private function udpServer($ip, $port, OutputInterface $output)
    {
        if(!($socket = socket_create(AF_INET, SOCK_DGRAM, 0)))
        {
            $errorcode = socket_last_error();
            $errormsg = socket_strerror($errorcode);
            $output->writeln([
                'Couldn\'t create socket',
                $errorcode,
                $errormsg
            ]);
            die();
        }
        
        $output->writeln(["Socket created"]);
        
        // Bind the source address
        if( !socket_bind($socket, $ip , $port) )
        {
            $errorcode = socket_last_error();
            $errormsg = socket_strerror($errorcode);
            $output->writeln([
                'Could not bind socket:',
                $errorcode,
                $errormsg
            ]);
            die();
        }
        $output->writeln(["Socket bind OK "]);
        $from = '';
        $port = 0;
        $buf = '';
        socket_recvfrom($socket, $buf, 2048, 0, $from, $port);
        $output->writeln([
            'Client is now connected to us.',
            $from,
            $port,
            'Received:',
            $buf
        ]);
    }
  

• client

    private function udpClient($ip, $port, OutputInterface $output)
    {
        if(!($sock = socket_create(AF_INET, SOCK_DGRAM, 0)))
        {
            $errorcode = socket_last_error();
            $errormsg = socket_strerror($errorcode);
            $output->writeln([
                'Couldn\'t create socket',
                $errorcode,
                $errormsg
            ]);
            die();
        }
        $message = 'client udp message';
        
        $bytes = socket_sendto($sock, $message , strlen($message), 0, $ip, $port);
        socket_close($sock);
        $output->writeln([
            'send ' . $bytes . ' bytes'
        ]);
    }
  

TCP