2018-2019-1 20165201 实验三 实时系统

2018-2019-1 20165201 实验三 实时系统

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实验三-实时系统-1

任务详情

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
上方提交代码
附件提交测试截图，至少要测试附件中的两个文件

查看wc的功能

在终端中输入man wc查看wc的功能

可以看到，wc功能可以打印出文件的行数、单词数、字数，十分好用！

wc运行结果

代码

服务器端server

//
//  main.c
//  server
//
//  Created by shadow on 2018/11/14.
//  Copyright © 2018 shadow. All rights reserved.
//

#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 165201
#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
", file_name);
        
        // 打开文件，准备写入
        FILE *fp = fopen(file_name, "w");
        if(NULL == fp)
        {
            printf("File:	%s Can Not Open To Write
", 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:	%s Write Failed
", file_name);
                break;
            }
            bzero(buffer, BUFFER_SIZE);
        }
        
        
        // 接收成功后，关闭文件，关闭socket
        printf("Receive %s successful!
", file_name);
        fclose(fp);
        
        
        // 统计文件单词个数，并发送给客户端
        int words=0;
        char s[1000];
        FILE *fp2;
        if((fp2=fopen(file_name,"r"))==NULL){
            printf("ERROR!
");
            exit(0);
        }
        while(fscanf(fp2,"%s",s)!=EOF)
            words++;
        fclose(fp2);
        //printf("%d words.
",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;
} 

客户端client

//
//  main.c
//  client
//
//  Created by shadow on 2018/11/14.
//  Copyright © 2018 shadow. All rights reserved.
//

#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 165201
#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:	");
    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
", 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("Transfer file %s successful!
", file_name);
        send(client_socket_fd,"OK",BUFFER_SIZE,0);
        recv(client_socket_fd,buffer,BUFFER_SIZE,0);
        printf("%d
",atoi(buffer));
    }
    
    close(client_socket_fd);
    return 0;
}

代码运行结果

实验三-实时系统-2

任务详情

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

查看pthread功能

在终端中输入man pthread查看pthread的功能

代码

服务器端server_pthread

//
//  main.c
//  server_pthread
//
//  Created by shadow on 2018/11/19.
//  Copyright © 2018 shadow. All rights reserved.
//

#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 155314
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512

pthread_mutex_t counter_mutex = PTHREAD_MUTEX_INITIALIZER;

void *wc(void *m) // 统计文件单词个数
{
    pthread_mutex_lock(&counter_mutex);
    // 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，准备写入
    FILE *fp = fopen(file_name, "w");
    if(NULL == fp)
    {
        printf("File:	%s Can Not Open To Write
", 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:	%s Write Failed
", file_name);
            break;
        }
        bzero(buffer, BUFFER_SIZE);
    }
    
    
    // 接收成功后，关闭文件，关闭socket
    printf("Receive File:	%s From Client IP Successful!
", 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!
");
        exit(0);
    }
    while(fscanf(fp2,"%s",s)!=EOF)
        words++;
    fclose(fp2);
    
    sprintf(buffer,"%d",words);
    
    send(new_server_socket_fd,buffer,BUFFER_SIZE,0);
    close(new_server_socket_fd);
    
    // 关闭与客户端的连接
    
    pthread_mutex_unlock( &counter_mutex );
    return NULL;
    
}

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;
        }
        
        pthread_create(&t, NULL, &wc, NULL);
        pthread_join(&t, NULL);
        
    }
    // 关闭监听用的socket
    close(server_socket_fd);
    return 0;
}