实验三 实时系统 20165235

实验三 实时系统 20165235

实验一

学习使用Linux命令wc(1)基于Linux Socket程序设计实现wc，（1）服务器(端口号是你学号的后6位)和客户端，客户端传一个文本文件给服务器，服务器返加文本文件中的单词数

• wc的使用截图：
  

• 客户端截图：
  

• 服务器端截图：
  
• 客户端代码：

#include<netinet/in.h>   // sockaddr_in  
#include<sys/types.h>    // socket  
#include<sys/socket.h>   // socket  
#include<stdio.h>        // printf  
#include<stdlib.h>       // exit  
#include<string.h>       // bzero  

#define SERVER_PORT 165235  
#define BUFFER_SIZE 1024  
#define FILE_NAME_MAX_SIZE 512  

int main()  
{  
    // 声明并初始化一个客户端的socket地址结构  
    struct sockaddr_in client_addr;  
    bzero(&client_addr, sizeof(client_addr));  
    client_addr.sin_family = AF_INET;  
    client_addr.sin_addr.s_addr = htons(INADDR_ANY);  
    client_addr.sin_port = htons(0);  

    // 创建socket，若成功，返回socket描述符  
    int client_socket_fd = socket(AF_INET, SOCK_STREAM, 0);  
    if(client_socket_fd < 0)  
    {  
        perror("Create Socket Failed:");  
        exit(1);  
    }  

    // 绑定客户端的socket和客户端的socket地址结构 非必需  
    if(-1 == (bind(client_socket_fd, (struct sockaddr*)&client_addr, sizeof(client_addr))))  
    {  
        perror("Client Bind Failed:");  
        exit(1);  
    }  

    // 声明一个服务器端的socket地址结构，并用服务器那边的IP地址及端口对其进行初始化，用于后面的连接  
    struct sockaddr_in server_addr;  
    bzero(&server_addr, sizeof(server_addr));  
    server_addr.sin_family = AF_INET;  
    if(inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) == 0)  
    {  
        perror("Server IP Address Error:");  
        exit(1);  
    }  
    server_addr.sin_port = htons(SERVER_PORT);  
    socklen_t server_addr_length = sizeof(server_addr);  

    // 向服务器发起连接，连接成功后client_socket_fd代表了客户端和服务器的一个socket连接  
    if(connect(client_socket_fd, (struct sockaddr*)&server_addr, server_addr_length) < 0)  
    {  
        perror("Can Not Connect To Server IP:");  
        exit(0);  
    }  

    // 输入文件名，并放到缓冲区buffer中等待发送  
    char file_name[FILE_NAME_MAX_SIZE+1];  
    bzero(file_name, FILE_NAME_MAX_SIZE+1);  

    printf("Please Input File Name On Client:\t");
    scanf("%s", file_name);  

    char buffer[BUFFER_SIZE];  
    bzero(buffer, BUFFER_SIZE);  
    strncpy(buffer, file_name, strlen(file_name)>BUFFER_SIZE?BUFFER_SIZE:strlen(file_name));  

    // 向服务器发送buffer中的数据  
    if(send(client_socket_fd, buffer, BUFFER_SIZE, 0) < 0)  
    {  
        perror("Send File Name Failed:");  
        exit(1);  
    }  


    // 打开文件并读取文件数据  
        FILE *fp = fopen(file_name, "r");  
        if(NULL == fp)  
        {  
            printf("File:%s Not Found\n", file_name);  
        }  
        else  
        {  
            bzero(buffer, BUFFER_SIZE);  
            int length = 0;  
            // 每读取一段数据，便将其发送给服务器，循环直到文件读完为止  
            while((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)  
            {  
                if(send(client_socket_fd, buffer, length, 0) < 0)  
                {  
                    printf("Send File:%s Failed./n", file_name);  
                    break;  
                }  
                bzero(buffer, BUFFER_SIZE);  
            }  

            // 关闭文件  

            fclose(fp);  
            printf("File:%s Transfer Successful!\n", file_name);  
        char s[50]; 
        scanf("%s",s);
        send(client_socket_fd,"OK",BUFFER_SIZE,0);
        recv(client_socket_fd,buffer,BUFFER_SIZE,0);    
        printf("%d words.\n",atoi(buffer));
    }  

    close(client_socket_fd);  
    return 0;  
} 

• 服务器端代码：

#include<netinet/in.h>  // sockaddr_in  
#include<sys/types.h>   // socket  
#include<sys/socket.h>  // socket  
#include<stdio.h>       // printf  
#include<stdlib.h>      // exit  
#include<string.h>      // bzero  

#define SERVER_PORT 165235  
#define LENGTH_OF_LISTEN_QUEUE 20  
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512  

int main(void)  
{  
    // 声明并初始化一个服务器端的socket地址结构  
    struct sockaddr_in server_addr;  
    bzero(&server_addr, sizeof(server_addr));  
    server_addr.sin_family = AF_INET;  
    server_addr.sin_addr.s_addr = htons(INADDR_ANY);  
    server_addr.sin_port = htons(SERVER_PORT);  

    // 创建socket，若成功，返回socket描述符  
    int server_socket_fd = socket(PF_INET, SOCK_STREAM, 0);  
    if(server_socket_fd < 0)  
    {  
        perror("Create Socket Failed:");  
        exit(1);  
    }  
    int opt = 1;  
    setsockopt(server_socket_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));  

    // 绑定socket和socket地址结构  
    if(-1 == (bind(server_socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr))))  
    {  
        perror("Server Bind Failed:");  
        exit(1);  
    }  

    // socket监听  
    if(-1 == (listen(server_socket_fd, LENGTH_OF_LISTEN_QUEUE)))  
    {  
        perror("Server Listen Failed:");  
        exit(1);  
    }  

    while(1)  
    {  
        // 定义客户端的socket地址结构  
        struct sockaddr_in client_addr;  
        socklen_t client_addr_length = sizeof(client_addr);  

        // 接受连接请求，返回一个新的socket(描述符)，这个新socket用于同连接的客户端通信  
        // accept函数会把连接到的客户端信息写到client_addr中  
        int new_server_socket_fd = accept(server_socket_fd, (struct sockaddr*)&client_addr, &client_addr_length);  
        if(new_server_socket_fd < 0)  
        {  
            perror("Server Accept Failed:");  
            break;  
        }  

       // recv函数接收数据到缓冲区buffer中  
        char buffer[BUFFER_SIZE];  
        bzero(buffer, BUFFER_SIZE);  
        if(recv(new_server_socket_fd, buffer, BUFFER_SIZE, 0) < 0)  
        {  
            perror("Server Recieve Data Failed:");  
            break;  
        }  

        // 然后从buffer(缓冲区)拷贝到file_name中  
        char file_name[FILE_NAME_MAX_SIZE+1];  
        bzero(file_name, FILE_NAME_MAX_SIZE+1);  
        strncpy(file_name, buffer, strlen(buffer)>FILE_NAME_MAX_SIZE?FILE_NAME_MAX_SIZE:strlen(buffer));  
        printf("%s\n", file_name);  

    // 打开文件，准备写入  
        FILE *fp = fopen(file_name, "w");  
        if(NULL == fp)  
        {  
            printf("File:\t%s Can Not Open To Write\n", file_name);  
            exit(1);  
        }  

    // 从客户端接收数据到buffer中  
        // 每接收一段数据，便将其写入文件中，循环直到文件接收完并写完为止  
        bzero(buffer, BUFFER_SIZE);  
        int length = 0;  
        while((length = recv(new_server_socket_fd, buffer, BUFFER_SIZE, 0)) > 0)  
        {  
        if(strcmp(buffer,"OK")==0) break;
            if(fwrite(buffer, sizeof(char), length, fp) < length)  
            {  
                printf("File:\t%s Write Failed\n", file_name);  
                break;  
            }  
            bzero(buffer, BUFFER_SIZE);  
        }  


    // 接收成功后，关闭文件，关闭socket  
        printf("Receive File:\t%s From Client IP Successful!\n", file_name);  
        fclose(fp);


    // 统计文件单词个数，并发送给客户端
    int words=0;
    char s[100];
    FILE *fp2;
    if((fp2=fopen(file_name,"r"))==NULL){
        printf("ERROR!\n");
        exit(0);
    }
    while(fscanf(fp2,"%s",s)!=EOF)
        words++;
    fclose(fp2);
    //printf("%d words.\n",words);


    sprintf(buffer,"%d",words);

    send(new_server_socket_fd,buffer,BUFFER_SIZE,0);

    //send(new_server_socket_fd,&words,sizeof(words),0);
    close(new_server_socket_fd);  



        // 关闭与客户端的连接  

    }  
    // 关闭监听用的socket  
    close(server_socket_fd);  
    return 0;  
} 

实验二

使用多线程实现wc服务器并使用同步互斥机制保证计数正确，上方提交代码，下方提交测试，对比单线程版本的性能，并分析原因

• 实验截图：
• 服务器端截图：
  
• 客户端截图：
  

服务器端代码：

#include<netinet/in.h>  // sockaddr_in  
#include<sys/types.h>   // socket  
#include<sys/socket.h>  // socket  
#include<stdio.h>       // printf  
#include<stdlib.h>      // exit  
#include<string.h>      // bzero  

#define PORT 165235
#define BUFFER_SIZE 1024

int main(void){
   /*初始化一个服务器端的socket地址结构*/
   struct sockaddr_in server_addr;
   bzero(&server_addr,sizeof(server_addr));
   server_addr.sin_family=AF_INET;
   server_addr.sin_addr.s_addr=htons(INADDR_ANY);//INADDR_ANY表示0
   server_addr.sin_port = htons(PORT);
   
   /*创建socket，若成功，返回socket描述符 */
   int server_socket_fd = socket(PF_INET,SOCK_STREAM,0);
   if (server_socket_fd<0){
         perror("create socket fail:");    //將上一個函數發生的錯誤打印出來
         exit(1);
    }
    int opt = 1;
    setsockopt(server_socket_fd,SOL_SOCKET,SO_REUSEADDR, &opt, sizeof(opt));//设置套接口选项
    

    /*绑定socket和socket地址结构  */
    if(-1==bind(server_socket_fd,(struct sockaddr*)&server_addr,sizeof(server_addr))){
          perror("Server Bind Failed:");  
          exit(1);       
    }


    /*socket监听 */
    if(-1==listen(server_socket_fd,5)){
          perror("Server Listen Failed:");  
          exit(1); 
     }



     FILE *fp;
     if(fp=fopen("test2.txt","wb")==NULL){
          perror("file open Failed:");  
          exit(1); 
     }

    while(1){
             /*定义客户端的socket地址结构 */
             struct sockaddr_in client_addr;
             socklen_t client_addr_length = sizeof(client_addr);//client_addr的长度
             


            /*接受连接请求，返回一个新的socket(描述符)，这个新socket用于同连接的客户端通信,*/

            /* accept函数会把连接到的客户端信息写到client_addr中*/
             int new_server_socket_fd = accept(server_socket_fd,(struct sockaddr*)&client_addr,&client_addr_length);
             if(new_server_socket_fd < 0)  
             {  
                      perror("Server Accept Failed:");  
                      break;  
             }  
             

            /*recv函数接收数据到缓冲区buffer中 */
            char buffer[BUFFER_SIZE];
            bzero(buffer,BUFFER_SIZE);

            int ncount;
            while((ncount = recv(new_server_socket_fd,buffer,BUFFER_SIZE,0))>0){
                      fwrite(buffer,ncount,1,fp);
             }
            
             fclose(fp);              

             /*关闭与客户端的连接*/
             close(new_server_socket_fd); 

    }
            /*关闭监听用的socket */ 
            close(server_socket_fd); 
}