linux 套接口大小的设置

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
    int sockfd;
    int send_buf_size = 65536; // 64KB
    int recv_buf_size = 65536; // 64KB

    // 创建套接字
    if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
        perror("socket creation failed");
        exit(EXIT_FAILURE);
    }

    // 设置发送缓冲区大小
    if (setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, &send_buf_size, sizeof(send_buf_size)) < 0) {
        perror("setsockopt(SO_SNDBUF) failed");
        close(sockfd);
        exit(EXIT_FAILURE);
    }

    // 设置接收缓冲区大小
    if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &recv_buf_size, sizeof(recv_buf_size)) < 0) {
        perror("setsockopt(SO_RCVBUF) failed");
        close(sockfd);
        exit(EXIT_FAILURE);
    }

    // 其他套接字操作...

    close(sockfd);
    return 0;
}