使用 boost::asio 监听 UDP 端口失败

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问题描述

我有一个服务器，它收集信息并通过本地网络广播一些消息.我正在使用 boost::asio 在端口 8079 上通过 UDP 广播这些数据包，我可以使用 WireShark 验证这些数据包实际上是按预期广播的.

I have a server that gathers information and broadcasts some messages across the local network. I'm using boost::asio to broadcast these via UDP on port 8079 and I can verify with WireShark that these packets are actually broadcasted as intended.

现在，很自然地，我想跟进一个可以对这些消息做出反应的听众，但我很难收到任何东西.我目前的做法是:

Now, naturally, I want to follow up with a listener that can react to these messages, but I am struggling to receive anything. My current approach is:

boost::asio::io_service io_service;
boost::asio::ip::udp::socket socket(io_service);
boost::asio::ip::udp::endpoint local(
    boost::asio::ip::address::from_string("192.168.2.102"),
    8079);
boost::system::error_code error;

std::cout << "Local bind: " << local << std::endl;

socket.open(boost::asio::ip::udp::v4(), error);
if(!error) {
    socket.bind(local);
    boost::array<char, 2048> buf;
    boost::asio::ip::udp::endpoint server;
    std::cout << "Listening..." << std::endl;
    while(true) {
        size_t len = socket.receive_from(boost::asio::buffer(buf), server);
        std::cout << "Received data:" << std::endl;
        std::cout.write(buf.data(), len);
        std::cout << std::endl;
    }
}

但我从来没有收到任何东西.使用调试器，我发现我只是永远卡在 receive_from 中，不知道为什么.

But I never receive anything. Using the debugger, I found that I'm just stuck in receive_from forever, and I don't know why.

我不确定是否会导致这些问题的一些进一步信息(主要来自 Wireshark):服务器和客户端在同一台机器上运行.服务器每两秒从端口 34050(源)向 8079(目标)发送一条发送 88 bytes 消息.192.168.2.102是本地网络中机器的ip.

Some further information (mostly from Wireshark) that I'm not sure about whether it could be causing these problems: Server and client are running on the same machine. The server is sending a sending an 88 bytes message every two seconds from port 34050 (source) to 8079 (destination). 192.168.2.102 is the ip of the machine within the local network.

使用 boost::asio 监听 UDP 端口失败

问题描述

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