windows系统c语言编写一个建议的以太网协议，以本地主机作为发送端和接收端，只要求调试结果数据帧内容发送方和接收方都能显示，且二者内容保持一致

在Windows环境下用C语言编写一个简单的以太网协议程序，通常涉及到网络编程，特别是使用套接字API进行通信。这里提供一个基本的示例，用于实现本地主机之间的数据帧发送和接收，并展示结果：

#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>

#pragma comment(lib, "ws2_32.lib")

#define BUFFER_SIZE 512
#define IP_ADDR "127.0.0.1" // 本地环回地址
#define PORT 12345

struct sockaddr_in server_addr;
struct sockaddr_in client_addr;

void send_data(char *data) {
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        printf("Error initializing Winsock\n");
        return;
    }

    SOCKET sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (sock == INVALID_SOCKET) {
        printf("Error creating socket\n");
        WSACleanup();
        return;
    }

    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr(IP_ADDR);
    server_addr.sin_port = htons(PORT);

    int bytes_sent = sendto(sock, data, strlen(data) + 1, 0, (struct sockaddr*)&server_addr, sizeof(server_addr));
    if (bytes_sent <= 0) {
        printf("Error sending data\n");
        closesocket(sock);
        WSACleanup();
    } else {
        printf("Sent %d bytes to %s:%d\n", bytes_sent, IP_ADDR, PORT);
    }
    closesocket(sock);
    WSACleanup();
}

void receive_data(SOCKET sock) {
    char buffer[BUFFER_SIZE];
    struct sockaddr_in from_addr;
    socklen_t from_len = sizeof(from_addr);

    int bytes_received = recvfrom(sock, buffer, BUFFER_SIZE - 1, 0, (struct sockaddr*)&from_addr, &from_len);
    if (bytes_received > 0) {
        printf("Received %d bytes from %s:%d: Data: %s\n", bytes_received,
               inet_ntoa(from_addr.sin_addr), ntohs(from_addr.sin_port), buffer);
    } else {
        printf("Error receiving data\n");
    }
    closesocket(sock);
}

int main() {
    if (getaddrinfo(NULL, PORT, NULL, &server_addr) != 0) {
        printf("Error getting address information\n");
        return 1;
    }

    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        printf("Error initializing Winsock\n");
        freeaddrinfo(&server_addr);
        return 1;
    }

    SOCKET sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (sock == INVALID_SOCKET) {
        printf("Error creating socket\n");
        WSACleanup();
        freeaddrinfo(&server_addr);
        return 1;
    }

    // 发送数据并等待接收
    send_data("Hello from sender");
    receive_data(sock);

    WSACleanup();
    freeaddrinfo(&server_addr);
    return 0;
}

这个示例创建了一个UDP套接字，用于发送和接收数据。发送方将字符串"Hello from sender"打包成数据帧发送到指定的IP地址和端口，接收方则监听该地址和端口并打印收到的数据。

注意，这是一个简化的示例，实际生产环境中可能需要处理更多的错误情况和细节，如连接确认、数据包校验等。此外，为了验证双方数据的一致性，你可以在接收方设置一个定时器，发送完数据后等待一段时间再关闭socket，然后立即尝试重新发送并接收数据，比较两者是否一致。