上午。在Java中的UDP广播
我很新的Java和套接字连接,但我试图发送UDP端口8001上的255.255.255.255的UDP数据包/广播到设备。我可以将数据发送得很好,但是当接收数据时,连接超时。我有一个数据包嗅探器,我可以看到数据包发送,然后设备响应。
我敢肯定,这是一个菜鸟错误,我在代码中遗漏了一些东西,但是我一直被困在它上面,任何帮助将不胜感激。
m_Socket = new DatagramSocket(m_SERVERPORT);
InetAddress address = InetAddress.getByName(m_SERVERIP);
m_DataPack = new DatagramPacket(m_SERVERCMD.getBytes(), m_SERVERCMD.getBytes().length,
address, m_SERVERPORT);
m_Socket.setBroadcast(true);
m_Socket.connect(address, m_SERVERPORT);
m_Socket.send(m_DataPack);
m_DataPack = new DatagramPacket(data, data.length,
address, m_SERVERPORT);
m_Socket.receive(m_DataPack); // This is where it times out
data = m_DataPack.getData();
String received = data.toString();
System.out.println("Received: " + received);
m_Socket.close();
谢谢Gig'Em。
编辑:
我不知道如果这有助于但是当我看m_Socket对象,我可以看到下面的发送权之前:
bound = true;
close = false;
connectedAddress = Inet4Address (id = 32) (-1,-1,-1,-1);
connectedPort = 8001;
connectState = 1;
created = true;
impl = PlainDatagramSocketImpl;
oldImpl = false;
和m_DataPack对象如下:
address = Inet4Address (id = 32) (-1,-1,-1,-1);
bufLength = 6 (size of packet I'm sending is 6 char long);
offset = 0;
port = 8001;
你确实意识到你的Gig'Em疏远了美国较大CS计划的毕业生,对吧? – jasonmp85 2010-06-02 04:29:14
@ jasonmp85对于那些想知道它是什么意思的非德克萨斯人来说:https://en.wikipedia.org/wiki/Traditions_of_Texas_A%26M_University#Gig_.27em(是的,我必须查看它;)) – Matthieu 2017-10-03 13:34:43