2018-2019-1 20165211 实验三 实时系统

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2018-2019-1 20165211 实验三 实时系统

任务一

1.实验要求
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
2. 实验步骤

  • 使用man命令查看wc(1)命令的主要内容

    ?

  • 编写服务器和客户端代码

    服务器:

    #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 165211
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512

void itoa(int i,char* string)
{
    int power,j;
    j=i;
    for(power=1;j>=10;j/=10)
        power*=10;
    for(;power>0;power/=10)
    {
        *string++=‘0‘+i/power;
        i%=power;
    }
    *string=‘‘;
}

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
", file_name);

    // 打开文件并读取文件数据
    FILE *fp = fopen(file_name, "w");
    if(NULL == fp)
    {
      printf("File:%s Not Found
", file_name);
    }
    else
    {
      bzero(buffer, BUFFER_SIZE);
      int length = 0;
      // 每读取一段数据，便将其发送给客户端，循环直到文件读完为止
      char*ch="bye";
while((length = recv(new_server_socket_fd, buffer, 1024, 0)) > 0)
  {
    if(strcmp(buffer,ch)==0)break;
    if(fwrite(buffer, sizeof(char), length, fp) < length)
    {
      printf("File:	%s Write Failed
", file_name);
      break;
    }
    bzero(buffer, BUFFER_SIZE);
  }fclose(fp);
int count=0;
    char s[21];
    FILE *fp1;
    if((fp1=fopen(file_name,"r"))==NULL){
        printf("Open the file failure...
");
        exit(0);
    }
    while(fscanf(fp,"%s",s)!=EOF)
        count++;
    fclose(fp1);
itoa(count,buffer);
    printf("There is(are) %s word(s) in the text.
",buffer);
      // 关闭文件

      send(new_server_socket_fd, buffer, strlen(buffer), 0);
      printf("File:%s Transfer Successful!
", file_name);
    }
    // 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);
  return 0;
}

    客户端

    #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 165211
#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 Server:	");
  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，准备写入
  FILE *fp = fopen(file_name, "r");
  if(NULL == fp)
  {
    printf("File:	%s Can Not Open To Write
", file_name);
    exit(1);
  }

  // 从服务器接收数据到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 = fread(buffer, sizeof(char), 1024, fp)) > 0)
      {
        if(send(client_socket_fd, buffer, length, 0) < 0)
        {
          printf("Send File:%s Failed./n", file_name);
          break;
        }
        bzero(buffer, BUFFER_SIZE);
      }
char ch[1024];
scanf("%s",ch);
send(client_socket_fd, "bye", 1024, 0);
    recv(client_socket_fd, buffer, 1024, 0);
    printf("There is(are) %s word(s) in the text %s.
",buffer,file_name);
  // 接收成功后，关闭文件，关闭socket
  printf("Receive File:	%s From Server IP Successful!
", file_name);

  close(client_socket_fd);
  return 0;
}
3. 操作截图

任务二

1. 实验要求
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
2. 实验步骤

服务器

#include<netinet/in.h>   
#include<sys/types.h>   
#include<sys/socket.h>   
#include<stdio.h>   
#include<stdlib.h>   
#include<string.h>   
#include<pthread.h>  
#define HELLO_WORLD_SERVER_PORT    165211
#define LENGTH_OF_LISTEN_QUEUE     20  
#define BUFFER_SIZE                1024  
#define FILE_NAME_MAX_SIZE         512  
void *process_client(void *new_server_socket);
int mywc(char file_name[])
{
    char ch;
    int flag=0,num=0;
    FILE *fp;
    if((fp = fopen(file_name,"r"))==NULL)
    {
        printf("Failure to open %s
",file_name);
        exit(0);
    }
    while((ch=fgetc(fp))!=EOF)
    {
         if(ch==‘ ‘ || ch==‘
‘ || ch==‘	‘ || ch==‘
‘)
        {
            flag=0;
        }
        else
        {
            if(flag==0)
            {
                flag=1;
                num++;
            }

        }            
    }
    printf("count：%d 
",num);
    fclose(fp);
    return num;
}
int main(int argc, char **argv)  
{  
// set socket‘s address information   
// 设置一个socket地址结构server_addr,代表服务器internet的地址和端口  
    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(HELLO_WORLD_SERVER_PORT);  
// create a stream socket   
// 创建用于internet的流协议(TCP)socket，用server_socket代表服务器向客户端提供服务的接口  
    int server_socket = socket(PF_INET, SOCK_STREAM, 0);  
    if (server_socket < 0)  
    {  
        printf("Create Socket Failed!
");  
        exit(1);  
    }  

// 把socket和socket地址结构绑定   
    if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))  
    {  
        printf("Server Bind Port: %d Failed!
", HELLO_WORLD_SERVER_PORT);  
        exit(1);  
    }  

// server_socket用于监听   
    if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))  
    {  
        printf("Server Listen Failed!
");  
        exit(1);  
    }  
// 服务器端一直运行用以持续为客户端提供服务   
      
    while(1)
    {
// 定义客户端的socket地址结构client_addr，当收到来自客户端的请求后，调用accept  
// 接受此请求，同时将client端的地址和端口等信息写入client_addr中  
        struct sockaddr_in client_addr;  
        socklen_t length = sizeof(client_addr);  


        int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);  
        printf("connected to client
");
        if (new_server_socket < 0)  
        {  
            printf("Server Accept Failed!
");  
              
        }
        //添加进程相关代码
        pthread_t pid;
        if(pthread_create(&pid, NULL, process_client,(void *) &new_server_socket) < 0){
              printf("pthread_create error
");
        }
        
    }
//  close(server_socket);
}
void *process_client(void *new_server_socket)
{
        int sockid=*(int *)new_server_socket;
        FILE *fp;
        //接受来自客户端的文件
        char buffer[BUFFER_SIZE]; 
        char file_name[FILE_NAME_MAX_SIZE];
        bzero(buffer, sizeof(buffer));  
        int length=0;
        if(recv(sockid,buffer,BUFFER_SIZE, 0)==-1)
        {
            printf("接受文件名%s失败
",buffer);
        }
        strcpy(file_name,buffer);
        strcat(file_name,"-server");
        if((fp = fopen(file_name,"w"))==NULL)
        {
            printf("Failure to open %s
",file_name);
            exit(0);
        }
        while( length = recv(sockid, buffer, BUFFER_SIZE, 0))
        {
            if(length<0)
            {
                printf("fail to accept file
");
                exit(0);
            }
            
            if(fwrite(buffer,sizeof(char),length,fp)<length)
            {
                printf("fail to write file
");
            }
            bzero(buffer, BUFFER_SIZE);
        }
        fclose(fp);
        printf("accept the file successfully
");
        int number=0;
        number=mywc(file_name);
        bzero(buffer, BUFFER_SIZE);  
        buffer[0]=number+48;
 
     
        bzero(buffer, sizeof(buffer));  
        

        printf("File Transfer Finished!
");    
        close(new_server_socket);  
}

客户端

#include<netinet/in.h>                         // for sockaddr_in  
#include<sys/types.h>                          // for socket  
#include<sys/socket.h>                         // for socket  
#include<stdio.h>                              // for printf  
#include<stdlib.h>                             // for exit  
#include<string.h>                             // for bzero  
  
#define HELLO_WORLD_SERVER_PORT       165211  
#define BUFFER_SIZE                   1024  
#define FILE_NAME_MAX_SIZE            512  
int mywc(char file_name[]);
int main(int argc, char **argv)  
{  
    FILE *fp;
    if (argc != 2)  
    {  
        printf("Usage: ./%s ServerIPAddress
", argv[0]);  
        exit(1);  
    }  

// 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口  
    struct sockaddr_in client_addr;  
    bzero(&client_addr, sizeof(client_addr));  
    client_addr.sin_family = AF_INET; // internet协议族  
    client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址  
    client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口  

// 创建用于internet的流协议(TCP)类型socket，用client_socket代表客户端socket  
    int client_socket = socket(AF_INET, SOCK_STREAM, 0);  
    if (client_socket < 0)  
    {  
        printf("Create Socket Failed!
");  
        exit(1);  
    }  

// 把客户端的socket和客户端的socket地址结构绑定   
    if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))  
    {  
        printf("Client Bind Port Failed!
");  
        exit(1);  
    }  

// 设置一个socket地址结构server_addr,代表服务器的internet地址和端口  
    struct sockaddr_in  server_addr;  
    bzero(&server_addr, sizeof(server_addr));  
    server_addr.sin_family = AF_INET;  

// 服务器的IP地址来自程序的参数   
    if (inet_aton(argv[1], &server_addr.sin_addr) == 0)  
    {  
        printf("Server IP Address Error!
");  
        exit(1);  
    }                                                                                                               
    server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);  
    socklen_t server_addr_length = sizeof(server_addr);  
    // 向服务器发起连接请求，连接成功后client_socket代表客户端和服务器端的一个socket连接  
    if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)  
    {  
        printf("Can Not Connect To %s!
", argv[1]);  
        exit(1);  
    }  

    char file_name[FILE_NAME_MAX_SIZE + 1];  
    bzero(file_name, sizeof(file_name));  
    printf("Please Input File Name.	");  
    scanf("%s", file_name);  
    if((fp = fopen(file_name,"r"))==NULL)
    {
         printf("Failure to open %s
",file_name);
         exit(0);
    }
    
    char buffer[BUFFER_SIZE];  
    bzero(buffer, sizeof(buffer));  
    strcpy(buffer,file_name);
    if(send(client_socket,buffer,BUFFER_SIZE,0)==-1)
    {
        printf("fail to send filename
");
    }
    char ch;
    int i=0;
    while((ch=fgetc(fp))!=EOF)
    {
        buffer[i++]=ch;
        if(i>=BUFFER_SIZE)
        {
            if((send(client_socket, buffer, BUFFER_SIZE, 0))==-1)
            {
                printf("fail to send file
");
            }
            bzero(buffer, sizeof(buffer));
            i=0;
        }
    }
    if(i<BUFFER_SIZE)
    {
        if((send(client_socket, buffer, i, 0))==-1)
        {
            printf("fail to send file
");
        }
    }
    printf("send %s finish
",file_name);
    mywc(file_name);
    // 向服务器发送buffer中的数据，此时buffer中存放的是客户端需要接收的文件 
    //以下接收服务器发来的单词个数
    bzero(buffer, sizeof(buffer));

    fclose(fp);  
    close(client_socket);  
    return 0;  

}  
 int mywc(char file_name[])
  {
       FILE *fp;
       char ch;
       int flag=0,num=0;
       if((fp = fopen(file_name,"r"))==NULL)
       {
            printf("Failure to open %s
",file_name);
            exit(0);
       }
       while((ch=fgetc(fp))!=EOF)
       {
            if(ch==‘ ‘ || ch==‘
‘ || ch==‘	‘ || ch==‘
‘)
            flag=0;
            else
            {
                 if(flag==0)
                 {
                      flag=1;
                      num++;
                 }
            }
       }
       printf("result is:%d 
",num);
       fclose(fp);
       return num;
}
3. 实验截图

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