/**
 * @filename:    UDP_BROADCAST.c
 * @brief:       UDP_BROADCAST
 * @author:      philia
 * @date:        2026/4/19
 * @version:     ver1.0
 * @note         NONE
 * CopyRight (c) 2026   philia  All Right Reseverd
 */

#include <stdio.h>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <netinet/ip.h> /* superset of previous */
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>

int udp_socket;

int main(int argc, const char *argv[])
{

    // 创建套接字文件
    udp_socket = socket(AF_INET, SOCK_DGRAM, 0);
    if (udp_socket == -1)
    {
        fprintf(stderr, "udp_socket error, errno:%d,%s", errno, strerror(errno));
        exit(-1);
    }

    int flag = -1;
    int size = 4;

    // 获取当前的广播属性
    getsockopt(udp_socket, SOL_SOCKET, SO_BROADCAST,
               (void *)&flag, &size);

    printf("%d\n", flag);

    int optval = 1;
    // 设置广播属性
    setsockopt(udp_socket, SOL_SOCKET, SO_BROADCAST,
               &optval, 4);

    // 再次获取当前的广播属性
    getsockopt(udp_socket, SOL_SOCKET, SO_BROADCAST,
               (void *)&flag, &size);

    printf("%d\n", flag);
    return 0;
}

/**
 * @filename:    UDP_BROADCAST.c
 * @brief:       UDP_BROADCAST
 * @author:      philia
 * @date:        2026/4/19
 * @version:     ver1.0
 * @note         NONE
 * CopyRight (c) 2026   philia  All Right Reseverd
 */

#include <stdio.h>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <netinet/ip.h> /* superset of previous */
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>

int udp_socket;

int main(int argc, const char *argv[])
{

    // 创建套接字文件
    udp_socket = socket(AF_INET, SOCK_DGRAM, 0);
    if (udp_socket == -1)
    {
        fprintf(stderr, "udp_socket error, errno:%d,%s", errno, strerror(errno));
        exit(-1);
    }

    int flag = -1;
    int size = 4;

    // 获取当前的广播属性
    getsockopt(udp_socket, SOL_SOCKET, SO_BROADCAST,
               (void *)&flag, &size);

    printf("%d\n", flag);

    int optval = 1;
    // 设置广播属性
    setsockopt(udp_socket, SOL_SOCKET, SO_BROADCAST,
               &optval, 4);

    // 再次获取当前的广播属性
    getsockopt(udp_socket, SOL_SOCKET, SO_BROADCAST,
               (void *)&flag, &size);

    printf("%d\n", flag);
    return 0;
}