我试图在两个进程之间使用MulticastSocket。 服务器发送数据包和客户端需要读取它。服务器代码是:
MulticastSocket multicastSocket = new MulticastSocket();
multicastSocket.setTimeToLive((Integer) config.getValue("MULTICAST_TTL"));
multicastSocket.setLoopbackMode(false);
multicastSocket.setReuseAddress(true);
String msg = "KA";
InetAddress multicastGroup = "225.3.0.1";
int port = 4000;
DatagramPacket pkt = new DatagramPacket(msg.getBytes(), msg.getBytes().length, multicastGroup, port);
while(true) {
try{
multicastSocket.send(pkt);
System.out.println("SPEDITO PACCHETTO: "+pkt.getSocketAddress());
}catch ( IOException e){
System.out.println("Errore di comunicazione con la rete multicast. "+e.getMessage());
}
}
客户端代码是:
this.multicastSocket = new MulticastSocket(4000);
InetAddress multicastGroup = InetAddress.getByName("225.3.0.1");
this.multicastSocket.joinGroup(multicastGroup);
DatagramPacket pkt = new DatagramPacket(new byte[512], 512);
while(true){
System.out.println("GOING TO READ");
multicastSocket.receive(pkt);
System.out.println("READ");
byte[] b = pkt.getData();
String msg = new String(b, 0, pkt.getLength());
}
问题是服务器发送数据包(send(pkt)返回),而不是客户端没有收到packate(接收(pkt)不返回)。问题在哪里?
p.s。:服务器和客户端在同一台计算机上,MULTICAST_TTL为1。