#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>

int main()
{
    int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0)
    {
        perror("Error opening socket");
        return 1;
    }

    int sndbuf;
    socklen_t optlen = sizeof(sndbuf);
    if (getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, &sndbuf, &optlen) < 0)
    {
        perror("Error getting socket option");
        close(sockfd);
        return 1;
    }

    printf("Send buffer size: %d bytes\n", sndbuf);

    close(sockfd);
    return 0;
}