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报文模拟解析/vdes_simulator.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <math.h>
+
+
+// Windows专用网络头文件
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#include <windows.h>  
+#pragma comment(lib, "ws2_32.lib")  // 链接Winsock库
+
+#define PORT 8082
+#define BUFFER_SIZE 4096
+#define MAX_SHIPS 10
+
+// 船舶数据结构体
+typedef struct {
+    char mmsi[20];
+    double latitude;
+    double longitude;
+    double speed;
+    int course;
+    int heading;
+    int nav_status;
+    char timestamp[30];
+    char ship_name[50];
+    int ship_type;
+    double draught;
+    char destination[50];
+    char eta[30];
+} VDESData;
+
+// 生成随机浮点数 (min, max)
+double rand_range(double min, double max) {
+    return min + (double)rand() / RAND_MAX * (max - min);
+}
+
+// 获取当前时间戳
+void get_current_timestamp(char *buffer) {
+    time_t now = time(NULL);
+    struct tm *t = localtime(&now);
+    strftime(buffer, 30, "%Y-%m-%d %H:%M:%S", t);
+}
+
+// 生成未来时间戳
+void get_future_timestamp(char *buffer, int days) {
+    time_t now = time(NULL);
+    now += days * 24 * 3600; // 添加天数
+    struct tm *t = localtime(&now);
+    strftime(buffer, 30, "%Y-%m-%d %H:%M:%S", t);
+}
+
+// 创建一批船舶数据
+void create_vdes_data_batch(VDESData *batch, int count) {
+    for (int i = 0; i < count; i++) {
+        // 生成随机MMSI (336295959 - 336295969)
+        snprintf(batch[i].mmsi, 20, "%d", 336295959 + rand() % 11);
+        
+        batch[i].latitude = round(rand_range(30.5, 31.0) * 1000000) / 1000000.0;
+        batch[i].longitude = round(rand_range(122.0, 123.0) * 1000000) / 1000000.0;
+        batch[i].speed = round(rand_range(0, 30) * 10) / 10.0;
+        batch[i].course = rand() % 360;
+        batch[i].heading = rand() % 360;
+        batch[i].nav_status = rand() % 9;
+        
+        get_current_timestamp(batch[i].timestamp);
+        
+        char ship_num[10];
+        snprintf(ship_num, 10, "%d", 1000 + rand() % 9000);
+        strcpy(batch[i].ship_name, "船舶_");
+        strcat(batch[i].ship_name, ship_num);
+        
+        batch[i].ship_type = 1 + rand() % 99;
+        batch[i].draught = round(rand_range(1.0, 15.0) * 10) / 10.0;
+        
+        char port_num[10];
+        snprintf(port_num, 10, "%d", 1 + rand() % 100);
+        strcpy(batch[i].destination, "港口_");
+        strcat(batch[i].destination, port_num);
+        
+        get_future_timestamp(batch[i].eta, 1 + rand() % 7);
+    }
+}
+
+// 将船舶数据转换为JSON字符串
+void vdes_data_to_json(VDESData *data, char *json, int index, int is_last) {
+    char buffer[1024];
+    snprintf(buffer, 1024,
+        "{"
+        "\"mmsi\":\"%s\","
+        "\"latitude\":%.6f,"
+        "\"longitude\":%.6f,"
+        "\"speed\":%.1f,"
+        "\"course\":%d,"
+        "\"heading\":%d,"
+        "\"nav_status\":%d,"
+        "\"timestamp\":\"%s\","
+        "\"ship_name\":\"%s\","
+        "\"ship_type\":%d,"
+        "\"draught\":%.1f,"
+        "\"destination\":\"%s\","
+        "\"eta\":\"%s\""
+        "}%s",
+        data->mmsi, data->latitude, data->longitude, data->speed,
+        data->course, data->heading, data->nav_status, data->timestamp,
+        data->ship_name, data->ship_type, data->draught, data->destination,
+        data->eta,
+        is_last ? "" : ",");
+    
+    strcat(json, buffer);
+}
+
+int main() {
+    // 初始化Winsock
+    WSADATA wsaData;
+    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
+        perror("WSAStartup failed");
+        exit(EXIT_FAILURE);
+    }
+
+    srand(time(NULL)); // 初始化随机种子
+    
+    SOCKET server_fd, new_socket;  // Windows下使用SOCKET类型
+    struct sockaddr_in address;
+    char opt = '1';  // Windows下需要char类型
+    int addrlen = sizeof(address);
+    char buffer[BUFFER_SIZE] = {0};
+    
+    // 创建socket文件描述符
+    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
+        perror("socket failed");
+        WSACleanup();
+        exit(EXIT_FAILURE);
+    }
+    
+    // 设置socket选项 (Windows下只使用SO_REUSEADDR)
+    if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == SOCKET_ERROR) {
+        perror("setsockopt");
+        closesocket(server_fd);
+        WSACleanup();
+        exit(EXIT_FAILURE);
+    }
+    
+    address.sin_family = AF_INET;
+    address.sin_addr.s_addr = INADDR_ANY;
+    address.sin_port = htons(PORT);
+    
+    // 绑定socket到端口
+    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
+        perror("bind failed");
+        closesocket(server_fd);
+        WSACleanup();
+        exit(EXIT_FAILURE);
+    }
+    
+    // 开始监听
+    if (listen(server_fd, 3) < 0) {
+        perror("listen");
+        closesocket(server_fd);
+        WSACleanup();
+        exit(EXIT_FAILURE);
+    }
+    
+    printf("VDES数据模拟器正在运行，监听端口 %d...\n", PORT);
+    
+    // 接受客户端连接
+    if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (int*)&addrlen)) == INVALID_SOCKET) {
+        perror("accept");
+        closesocket(server_fd);
+        WSACleanup();
+        exit(EXIT_FAILURE);
+    }
+    
+    printf("客户端已连接\n");
+    
+    while (1) {
+        // 随机等待时间 (1-5秒)
+        int sleep_time = 1 + rand() % 5;
+        Sleep(sleep_time * 1000);  // Windows下使用Sleep(毫秒)
+        
+        // 随机生成1-10条船舶数据
+        int ship_count = 1 + rand() % MAX_SHIPS;
+        VDESData ships[ship_count];
+        create_vdes_data_batch(ships, ship_count);
+        
+        // 转换为JSON数组
+        char json[BUFFER_SIZE] = "[";
+        for (int i = 0; i < ship_count; i++) {
+            vdes_data_to_json(&ships[i], json, i, (i == ship_count - 1));
+        }
+        strcat(json, "]");
+        
+        printf("生成 %d 条船舶数据:\n%s\n", ship_count, json);
+        
+        // 发送数据
+        if (send(new_socket, json, strlen(json), 0) == SOCKET_ERROR) {
+            perror("send failed");
+            break;
+        }
+        printf("数据已发送\n");
+    }
+    
+    // 清理资源
+    closesocket(new_socket);
+    closesocket(server_fd);
+    WSACleanup();
+    return 0;
+}