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
