linux tcp 发送缓冲区

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>

int main() {
    int sockfd;
    struct sockaddr_in server_addr;
    int send_buffer_size = 1024 * 1024; // 设置为1MB

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

    // 连接服务器
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(8080);
    server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");

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

    // 发送数据
    const char *message = "Hello, Server!";
    send(sockfd, message, strlen(message), 0);

    close(sockfd);
    return 0;
}