2019-2020-1 20175212童皓桢《信息安全系统设计》 实验三并发程序
并发程序-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
实验步骤
- 使用
man wc学习wc命令的功能用法
- 用socket编程实现
client.c
#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
#include <arpa/inet.h>
#include <unistd.h>
#include "head.h"
#define SERVER_PORT 5212
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
#define BEGIN 1;
int main()
{
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);
int client_socket_fd = socket(AF_INET, SOCK_STREAM, 0);
if(client_socket_fd < 0)
{
perror("Create Socket Failed!");
exit(1);
}
if(-1 == (bind(client_socket_fd, (struct sockaddr*)&client_addr, sizeof(client_addr))))
{
perror("Client Bind Failed!");
exit(1);
}
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);
if(connect(client_socket_fd, (struct sockaddr*)&server_addr, server_addr_length) < 0)
{
perror("Can Not Connect To Server IP!");
exit(0);
}
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));
if(send(client_socket_fd, buffer, BUFFER_SIZE, 0) < 0)
{
perror("Send File Name Failed!");
exit(1);
}
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;
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);
}
printf("Send File: %s Successful!\n", file_name);
printf("The File has %d words.\n",wcfunc(file_name));
}
/*
char s[50];
scanf("%s",s);
send(client_socket_fd,"OK",50,0);
char recvdata[sizeof(int)+1];
recv(client_socket_fd,recvdata,sizeof(int),0);
recvdata[sizeof(int)]='\0';
int words=atoi(recvdata);*/
fclose(fp);
close(client_socket_fd);
return 0;
}
int wcfunc(char *file_name)
{
int t;
int w = 0;
int state = 0;
FILE *in;
if((in = fopen(file_name,"r"))==NULL)
{
printf("wc %s:no this file or dir\n",file_name);
return 0;
}
while((t=fgetc(in))!=EOF)
{
if(t=='\n'||t==' '||t=='\r') {
state = 0;
continue;
} else {
if(state == 0) {
state = 1;
w++;
}
continue;
}
}
return w;
}
server.c
#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
#include <unistd.h>
#define SERVER_PORT 5212
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
#define BEGIN 1;
int main(void)
{
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);
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));
if(-1 == (bind(server_socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr))))
{
perror("Server Bind Failed!");
exit(1);
}
if(-1 == (listen(server_socket_fd, LENGTH_OF_LISTEN_QUEUE)))
{
perror("Server Listen Failed!");
exit(1);
}
while(1)
{
struct sockaddr_in client_addr;
socklen_t client_addr_length = sizeof(client_addr);
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;
}
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;
}
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);
FILE *fp = fopen(file_name, "w");
if(NULL == fp)
{
printf("File: %s Can Not Open To Write\n", file_name);
exit(1);
}
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!\n", file_name);
break;
}
bzero(buffer, BUFFER_SIZE);
}
printf("Receive File: %s From Client Successful!\n", file_name);
fclose(fp);
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);
char sendbuf[50];
sprintf(sendbuf,"%d",words);
send(new_server_socket_fd,sendbuf,50,0);
close(new_server_socket_fd);
}
close(server_socket_fd);
return 0;
}
3. 使用wc功能检查
并发程序-2
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
- 对比单线程版本的性能，并分析原因
实验步骤
- 使用socket编程
clinet.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <pthread.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include "head.h"
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
static void usage(const char* proc)
{
printf("%s[server_ip][server_port]\n", proc);
}
//./client server_ip, server_port
int main(int argc, char* argv[])
{
if(argc != 3)
{
usage(argv[0]);
return 1;
}
//1.创建sock
int sock = socket(AF_INET, SOCK_STREAM, 0);
if(sock < 0)
{
perror("socket");
return 2;
}
//2.connect
struct sockaddr_in server;
server.sin_family = AF_INET;
server.sin_port = htons(atoi(argv[2]));
//将点分十进制的字符串转换成能在网络上传输的网络号
server.sin_addr.s_addr = inet_addr(argv[1]);
//调用connect,第一个参数是客户端的socket套接字，第二个参数是服务器端套接字
if(connect(sock, (struct sockaddr*)&server, sizeof(server)) < 0)
{
perror("connect");
return 2;
}
/*//先写后读
char buf[1024];
while(1)
{
printf("Please enter# ");
fflush(stdout);
//读取标准输入键盘中的数据
ssize_t s = read(0, buf, sizeof(buf) - 1);
if(s > 0)
{
buf[s - 1] = 0;
//将buf中的内容写到套接字中
write(sock, buf, strlen(buf));
//读取服务器的响应
ssize_t _s = read(sock, buf, sizeof(buf)-1);
if(_s > 0)
{
buf[_s] = 0;
printf("server ech0# %s\n", buf);
}
}
}*/
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));
if(send(sock, buffer, BUFFER_SIZE, 0) < 0)
{
perror("Send File Name Failed!");
exit(1);
}
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;
while((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
{
if(send(sock, buffer, length, 0) < 0)
{
printf("Send File: %s Failed!/n", file_name);
break;
}
bzero(buffer, BUFFER_SIZE);
}
printf("Send File: %s Successful!\n", file_name);
printf("The File has %d words.\n",wcfunc(file_name));
}
fclose(fp);
close(sock);
return 0;
}
int wcfunc(char *file_name)
{
int t;
int w = 0;
int state = 0;
FILE *in;
if((in = fopen(file_name,"r"))==NULL)
{
printf("wc %s:no this file or dir\n",file_name);
return 0;
}
while((t=fgetc(in))!=EOF)
{
if(t=='\n'||t==' '||t=='\r') {
state = 0;
continue;
} else {
if(state == 0) {
state = 1;
w++;
}
continue;
}
}
return w;
}
server.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <pthread.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
static void Usage(char* proc)
{
printf("%s[local_ip], [local_port]\n", proc);
}
int startup(char* _ip, int _port)
{
int sock = socket(AF_INET, SOCK_STREAM, 0);
if(sock < 0)
{
perror("socket");
return 1;
}
struct sockaddr_in local;//初始化协议地址
local.sin_family = AF_INET;
local.sin_port = htons(_port);
local.sin_addr.s_addr = inet_addr(_ip);
//将套接字和tcp服务绑定（服务端ip地址）
if(bind(sock, (struct sockaddr*)&local, sizeof(local)) < 0)
{
perror("bind");
exit(3);
}
//监听这个套接字，监听指定端口，第二个参数表示可以排队连接的最大个数
if(listen(sock, 5) < 0)
{
perror("listen");
}
return sock;
}
void* handle(void* argc)
{
int newsock = (int)argc;
char buf[1024];
while(1)
{
int s = read(newsock, buf, sizeof(buf) - 1);
if(s > 0)
{
buf[s] = 0;
printf("client# %s\n", buf);
write(newsock, buf, strlen(buf));//服务器回显
}
else if(s == 0)
{
printf("client quit\n");
}
else
{
break;
}
}
close(newsock);
}
//argv[]指针数组，指向各个参数
int main(int argc, char* argv[])
{
if(argc != 3)
{
Usage(argv[0]);
return 2;
}
int listen_sock = startup(argv[1], atoi(argv[2]));
//printf("sock:%d\n", listen_sock);
//需要让子进程的子进程去提供服务
//父进程继续监听
char buf[1024];
while(1)
{
struct sockaddr_in client;
socklen_t len = sizeof(client);
int newsock = accept(listen_sock, (struct sockaddr*)&client, &len);
if(newsock < 0)
{
perror("accept");
continue;
}
//将网络中的数据转换为主机用户可以看懂的数据
printf("get a new client %s:%d\n", inet_ntoa(client.sin_addr), ntohs(client.sin_port));
//创建一个新的线程去服务
//主线程只负责监听工作
pthread_t tid;
//pthread_create(&tid, NULL, handle, (void*)newsock);
pthread_detach(tid);
/*char buffer[BUFFER_SIZE];
bzero(buffer, BUFFER_SIZE);
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);
FILE *fp = fopen(file_name, "w");
if(NULL == fp)
{
printf("File: %s Can Not Open To Write\n", file_name);
exit(1);
}
bzero(buffer, BUFFER_SIZE);
int length = 0;
while((length = recv(newsock, buffer, BUFFER_SIZE, 0)) > 0)
{
if(strcmp(buffer,"OK")==0)
break;
if(fwrite(buffer, sizeof(char), length, fp) < length)
{
printf("File: %s Write Failed!\n", file_name);
break;
}
bzero(buffer, BUFFER_SIZE);
}
printf("Receive File: %s From Client Successful!\n", file_name);
fclose(fp);
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);
char sendbuf[50];
sprintf(sendbuf,"%d",words);
send(newsock,sendbuf,50,0);
close(newsock);*/
}
close(listen_sock);
return 0;
}
分析原因：相较于单线程而言，多线程的各种进程可以同时执行，而不需要像单线程一样排队执行，不易出现进程阻塞，性能更好
并发程序-3
实验要求
-
交叉编译多线程版本服务器并部署到实验箱中
-
PC机作客户端测试wc服务器
-
提交测试截图
实验步骤
1.参照实验一，将PC连接到试验箱，并使其能互相ping通。
- 在ubuntu上交叉编译
