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
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wc的使用截图：
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客户端截图：
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服务器端截图：
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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);
}
