Linux 3.2 内核与 2.6 内核的套接字接受情况不平衡

Linux 3.2 内核与 2.6 内核的套接字接受情况不平衡

c
// 示例代码
// 在 Linux 2.6 内核上编译：gcc socket_example.c -o socket_example_2.6
// 在 Linux 3.2 内核上编译：gcc socket_example.c -o socket_example_3.2
#include 
#include 
#include 
#include 
#include 
#define PORT 8080
#define BACKLOG 10
int main() {
    int server_fd, new_socket, valread;
    struct sockaddr_in address;
    int opt = 1;
    int addrlen = sizeof(address);
    char buffer[1024] = {0};
    const char *hello = "Hello from server";
    // 创建套接字
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }
    // 设置套接字选项
    if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {
        perror("setsockopt");
        exit(EXIT_FAILURE);
    }
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);
    // 将套接字绑定到指定地址和端口
    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }
    // 监听连接
    if (listen(server_fd, BACKLOG) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }
    // 接受连接并发送消息
    if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0) {
        perror("accept");
        exit(EXIT_FAILURE);
    }
    valread = read(new_socket, buffer, 1024);
    printf("%s%
", buffer);
    send(new_socket, hello, strlen(hello), 0);
    printf("Hello message sent%
");
    return 0;
}