首先，需要查看您的API密钥是否正确以及是否启用了Futures API权限。

如果API密钥已确认正确，并且有足够的权限，请检查您的代码是否正确设置了连接和订阅。以下是一个示例代码，您可以基于此进行修改和调试：

#include 
#include 
#include 
#include 

#define MAX_RETRY_COUNTS 20  // 尝试重新连接的最大次数
#define BUF_SIZE 4096  // WebSocket数据缓存大小

struct lws_context *context = NULL;
struct lws *wsi = NULL;
int interrupted = 0, completed = 0, callback_return = 0;
char input_url[] = "wss://fstream.binance.com/ws/bnbbtc@aggTrade";  // Binance Future WebSocket连接地址
char output_buffer[BUF_SIZE];

/* 这里定义的是当前WebSocket连接的回调函数，根据您的代码需要进行调整 */
static int callback(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len)
{
    switch (reason)
    {
        case LWS_CALLBACK_CLIENT_ESTABLISHED:
            printf("Connection established\n");
            break;
        case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
            printf("Connection error\n");
            return -1;
        case LWS_CALLBACK_CLIENT_RECEIVE:
            memcpy(output_buffer, in, len);
            output_buffer[len] = '\0';
            printf("%s\n", output_buffer);
            break;
        default:
            break;
    }
    return 0;
}

/* WebSocket连接创建函数 */
static void connect_to_ws()
{
    int retry_counts = 0;

    printf("Connecting to %s...\n", input_url);

    /* WebSocket协议选项设置 */
    struct lws_client_connect_info conn_info = {
        .context = context,
        .address = input_url,
        .port = 443,
        .path = "",
        .host = "fstream.binance.com",
        .origin = "fstream.binance.com",
        .protocol = NULL,
        .iface = NULL,
        .ssl_connection = LCCSCF_USE_SSL,
        .local_protocol_name = NULL,
        .headers = NULL,
        .extensions = NULL
    };

    /* 创建WebSocket连接 */
    wsi = lws_client_connect_via_info(&conn_info);

    /* 等待连接成功或超时或异常 */
    while (wsi == NULL && !interrupted && retry_counts++ < MAX_RETRY_COUNTS)
    {
        lws_service(context, 2000);
        printf("...retrying connection...\n");
        wsi = lws_client_connect_via_info(&conn_info);
    }

    /* 连接失败返回 */
    if (wsi == NULL)
    {
        printf("Connection failed\n");
        callback_return = -1;
        completed = 1;
        return;
    }
}

/* WebSocket连接主函数 */
int main(int argc, char const *argv[])
{
    /* WebSocket协议选项设置 */
    struct lws_protocols protocols[] = {
        { NULL, callback, 0, 1024 },
        { NULL, NULL, 0, 0 } /* terminator */
    };
    struct lws_context_creation_info context_info = {
        .port = CONTEXT_PORT_NO_LISTEN,
        .protocols = protocols,
        .gid = -1,
        .uid = -1,
        .options = LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT | LWS_SERVER_OPTION