写一段C++代码实现以太网的收发

以太网通信通常涉及到底层的网络编程，这需要对socket编程和网络协议有深入理解。以下是一个简单的C++代码片段，使用了`boost::asio`库来模拟以太网数据包的发送和接收，但这并不直接对应于物理层的以太网帧，因为实际的以太网操作会更复杂，涉及到IP、TCP/IP等协议栈。

#include <boost/asio.hpp>
#include <boost/array.hpp>

// 假设我们有一个自定义的数据结构Packet，包含了以太网头部和用户数据
struct Packet {
    // ... 实现你的以太网头部和用户数据
};

class EthernetSocket {
public:
    EthernetSocket(boost::asio::io_context& io)
        : socket_(io, boost::asio::ip::udp::v4()) {}

    void send(const Packet& packet, const std::string& remote_ip, uint16_t remote_port) {
        boost::asio::ip::udp::endpoint endpoint(boost::asio::ip::address_v4::from_string(remote_ip), remote_port);
        boost::array<char, sizeof(packet)> buffer;
        // 将Packet内容复制到buffer
        // ... (假设你已经实现了这个转换)
        
        boost::asio::write(socket_, boost::asio::buffer(buffer), boost::asio::transfer_all());
    }

    template<typename Iterator>
    void receive(Packet& packet, Iterator begin, Iterator end) {
        boost::asio::ip::udp::endpoint from_endpoint;
        boost::array<char, sizeof(packet)> buffer;
        std::size_t bytes_transferred = socket_.receive(buffer, boost::asio::transfer_at_least(sizeof(packet)), from_endpoint);

        if (bytes_transferred == sizeof(packet)) {
            // 解析收到的字节到Packet
            // ... (假设你已经实现了从buffer反序列化到Packet)
        }
    }

private:
    boost::asio::ip::udp::socket socket_;
};

int main() {
    try {
        boost::asio::io_context io;
        EthernetSocket ethSocket(io);

        // 发送示例
        Packet myPacket; // 初始化你的数据...
        ethSocket.send(myPacket, "remote_ip", 1234); // 使用远程IP和端口

        // 接收示例
        Packet receivedPacket;
        ethSocket.receive(receivedPacket, &receivedPacket.begin(), &receivedPacket.end());

    } catch (std::exception& e) {
        std::cerr << "Error: " << e.what() << '\n';
    }

    return 0;
}