2017-2018-1 20155314《信息安全系统设计基础》实验三 并发程序
2017-2018-1 20155314《信息安全系统设计基础》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
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
实验步骤
-
用
man wc
命令学习wc
命令的使用
-
mywc的编写
-
mywc20155314.c:
#include <stdio.h> #include <stdlib.h> int main(int argc, char *argv[]){ int count=0; char s[100]; FILE *fp; if((fp=fopen(argv[1],"r"))==NULL){ printf("Open the file failure...\n"); exit(0); } while(fscanf(fp,"%s",s)!=EOF) count++; fclose(fp); printf("There is(are) %d word(s) in the text.\n",count); return 0; }
-
运行结果:
-
本题代码
-
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 #define SERVER_PORT 155314 #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; }
-
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 #define SERVER_PORT 155314 #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; }
运行结果
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
- 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
实验步骤
- 用
man pthread
命令学习pthread相关调用
本题代码
-
pthread_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 #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 *mywc20155314(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\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); 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; }
-
pthread_client.c同并发程序-1的client.c
运行结果
实验中遇到的问题及解决过程
Ubuntu Linux下exfat挂载问题
-
问题描述:
在Ubuntu下,由于版权的原因,默认不支持exFAT格式的U盘:
-
解决方法:
用
sudo apt-get install exfat-utils
命令添加对exFAT的支持:
我的64G exFAT格式的U盘终于能被Ubuntu所读取!