Linux 套接字缓冲区如何溢出

Linux套接字缓冲区溢出原理及案例代码

c
#include 
#include 
#include 
#include 
#include 
#include 
#define BUFFER_SIZE 1024
int main() {
    int sockfd;
    struct sockaddr_in server_addr;
    char buffer[BUFFER_SIZE];
    
    // 创建套接字
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) {
        perror("socket");
        exit(EXIT_FAILURE);
    }
    
    // 设置服务器地址
    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 = INADDR_ANY;
    
    // 绑定套接字
    if (bind(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
        perror("bind");
        exit(EXIT_FAILURE);
    }
    
    // 监听套接字
    if (listen(sockfd, 5) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }
    
    // 接收客户端连接
    int clientfd;
    struct sockaddr_in client_addr;
    socklen_t client_addrlen = sizeof(client_addr);
    clientfd = accept(sockfd, (struct sockaddr *)&client_addr, &client_addrlen);
    if (clientfd < 0) {
        perror("accept");
        exit(EXIT_FAILURE);
    }
    
    // 接收数据并存储到缓冲区
    ssize_t num_bytes = recv(clientfd, buffer, BUFFER_SIZE, 0);
    if (num_bytes < 0) {
        perror("recv");
        exit(EXIT_FAILURE);
    }
    
    // 打印接收到的数据
    printf("Received data: %s\n", buffer);
    
    close(clientfd);
    close(sockfd);
    
    return 0;
}