2017-2018-1 20155332实验三 实时系统报告
20155332 实验三
任务一：
1.学习使用Linux命令wc(1) 2.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 3.客户端传一个文本文件给服务器 4.服务器返加文本文件中的单词数
客户端
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define SERVER_PORT 5201
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
#define MAX 10000000
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
{
printf("buffer:%s\n",buffer);//buffer为filename
char *argv[]={"wc","-w",file_name,0};
execvp( "wc" ,argv);
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);
return 0;
}
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 8000
#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='\0';
}
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);
// 打开文件并读取文件数据
FILE *fp = fopen(file_name, "w");
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:\t%s Write Failed\n", 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...\n");
exit(0);
}
while(fscanf(fp,"%s",s)!=EOF)
count++;
fclose(fp1);
itoa(count,buffer);
printf("There is(are) %s word(s) in the text.\n",buffer);
// 关闭文件
send(new_server_socket_fd, buffer, strlen(buffer), 0);
printf("File:%s Transfer Successful!\n", 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;
}
任务二
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
对比单线程版本的性能，并分析原因
#include <sys/time.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define BACKLOG 1
#define MAXRECVLEN 10240
int main(int argc, char *argv[])
{
char buf[MAXRECVLEN];
int listenfd, connectfd;
int port;
struct sockaddr_in server;
struct sockaddr_in client;
socklen_t addrlen;
if (argc != 2) {
fprintf(stderr, "usage: %s <port>\n", argv[0]);
exit(0);
}
port = atoi(argv[1]);
if ((listenfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket() error. Failed to initiate a socket");
exit(1);
}
int opt = SO_REUSEADDR;
setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
bzero(&server, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(port);
server.sin_addr.s_addr = htonl(INADDR_ANY);
if(bind(listenfd, (struct sockaddr *)&server, sizeof(server)) == -1)
{
/* handle exception */
perror("Bind() error.");
exit(1);
}
if(listen(listenfd, BACKLOG) == -1)
{
perror("listen() error. \n");
exit(1);
}
addrlen = sizeof(client);
while(1){
if((connectfd=accept(listenfd,(struct sockaddr *)&client, &addrlen))==-1)
{
perror("accept() error. \n");
exit(1);
}
FILE *stream;
struct timeval tv;
gettimeofday(&tv, NULL);
printf("You got a connection from client's ip %s, port %d ",inet_ntoa(client.sin_addr),port);
int iret=-1;
char d[10240];
iret = recv(connectfd, buf, MAXRECVLEN, 0);
if(iret>0)
{
strcpy(d,buf);
stream = fopen(buf,"r");
bzero(buf, sizeof(buf));
strcat(buf,"单词数：");
char s[21];
long int count = 0;
while(fscanf(stream,"%s",s)!=EOF)
count++;
char str[10];
sprintf(str, "%ld", count);
int n = sizeof(str);
str[n] = '\0';
strcat(buf,str);
strcat(buf,"\n");
}else
{
close(connectfd);
break;
}
send(connectfd, buf, iret, 0);
close(listenfd);
return 0;
}
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#define MAXDATASIZE 100
int main(int argc, char *argv[])
{
int sockfd, num;
int port;
char buf[MAXDATASIZE];
struct hostent *he;
if (argc != 4)
{
printf("Usage: %s <PORT><IP Address><Filename>\n",argv[0]);
exit(1);
}
port = atoi(argv[1]);
if((he=gethostbyname(argv[2]))==NULL)
{
printf("gethostbyname() error\n");
exit(1);
}
if((sockfd=socket(AF_INET,SOCK_STREAM, 0))==-1)
{
printf("socket() error\n");
exit(1);
}
bzero(&server,sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(port);
server.sin_addr = *((struct in_addr *)he->h_addr);
if(connect(sockfd, (struct sockaddr *)&server, sizeof(server))==-1)
{
printf("connect() error\n");
exit(1);
}
char str[MAXDATASIZE] ;
strcpy(str,argv[3]);
if((num=send(sockfd,str,sizeof(str),0))==-1){
printf("send() error\n");
exit(1);
}
if((num=recv(sockfd,buf,MAXDATASIZE,0))==-1)
{
printf("recv() error\n");
exit(1);
}
buf[num-1]='\0';
printf("%s",buf);
close(sockfd);
return 0;
}
