linux socket缓冲区大小

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

int main() {
    int sockfd;
    struct sockaddr_in servaddr;
    int sendbuf_size = 65536; // 设置发送缓冲区大小为64KB

    // 创建socket
    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, &sendbuf_size, sizeof(sendbuf_size)) < 0) {
        perror("setsockopt failed");
        close(sockfd);
        exit(EXIT_FAILURE);
    }

    // 绑定和监听
    memset(&servaddr, 0, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
    servaddr.sin_port = htons(8080);

    if (bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) {
        perror("bind failed");
        close(sockfd);
        exit(EXIT_FAILURE);
    }

    if (listen(sockfd, 5) < 0) {
        perror("listen failed");
        close(sockfd);
        exit(EXIT_FAILURE);
    }

    // 接受连接并处理数据
    // ...

    close(sockfd);
    return 0;
}