2018-2019-1 20165333 實驗三 實時系統
阿新 • • 發佈:2018-11-19
一、任務一
(一)要求
1、基於Linux Socket程式設計實現wc(1)伺服器(埠號是你學號的後6位)和客戶端
2、客戶端傳一個文字檔案給伺服器
3、伺服器返加文字檔案中的單詞數
(二)實驗步驟
1、使用man 命令檢視學習wc命令
功能:統計指定檔案中的位元組數、字數、行數,並將統計結果顯示輸出。該命令統計指定檔案中的位元組數、字數、行數。如果沒有給出檔名,則從標準輸入讀取。wc同時也給出所指定檔案的總統計數。
引數:
-c 統計位元組數
-l 統計行數
-m 統計字元數(這個標誌不能與-c標誌一起使用)
-w 統計字數。一個字被定義為由空白、跳格或換行字元分隔的字串
-L 列印最長行的長度
-help 顯示幫助資訊
--version 顯示版本資訊
程式碼實現
serve.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 165333 #define LENGTH_OF_LISTEN_QUEUE 20 #define BUFFER_SIZE 1024 #define FILE_NAME_MAX_SIZE 512 int CountWordsOfEuropeanTxtFile(char *szFileName); int CountWordsInOneLine(const char *szLine); int main(void) { // 宣告並初始化一個伺服器端的socket地址結構 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); // 建立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)); // 繫結socket和socket地址結構 if(-1 == (bind(server_socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr)))) { perror("Server Bind Failed:"); exit(1); } // socket監聽 if(-1 == (listen(server_socket_fd, LENGTH_OF_LISTEN_QUEUE))) { perror("Server Listen Failed:"); exit(1); } while(1) { // 定義客戶端的socket地址結構 struct sockaddr_in client_addr; socklen_t client_addr_length = sizeof(client_addr); // 接受連線請求,返回一個新的socket(描述符),這個新socket用於同連線的客戶端通訊 // accept函式會把連線到的客戶端資訊寫到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函式接收資料到緩衝區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; } // 然後從buffer(緩衝區)拷貝到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("5333:%s\n", file_name); int count=0; bzero(buffer, BUFFER_SIZE); count = CountWordsOfEuropeanTxtFile(file_name); sprintf(buffer,"%d", count); if(send(new_server_socket_fd, buffer, sizeof(buffer), 0) < 0) { printf("Send File:%s Failed./n", file_name); } bzero(buffer, BUFFER_SIZE); /*/ 開啟檔案並讀取檔案資料 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; / 每讀取一段資料,便將其傳送給客戶端,迴圈直到檔案讀完為止 while((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0) { if(send(new_server_socket_fd, buffer, length, 0) < 0) { printf("Send File:%s Failed./n", file_name); break; } bzero(buffer, BUFFER_SIZE); } / 關閉檔案 fclose(fp); printf("File:%s Transfer Successful!\n", file_name); }*/ // 關閉與客戶端的連線 close(new_server_socket_fd); } // 關閉監聽用的socket close(server_socket_fd); return 0; } int CountWordsOfEuropeanTxtFile(char *szFileName) { int nWords = 0;//詞計數變數,初始值為0 FILE *fp; //檔案指標 char carrBuffer[1024];//每行字元緩衝,每行最多1024個字元 //開啟檔案 if ((fp = fopen(szFileName, "r")) == NULL) { return -1; //檔案開啟不成功是返回-1 } while (!feof(fp))//如果沒有讀到檔案末尾 { //從檔案中讀一行 if (fgets(carrBuffer, sizeof(carrBuffer),fp) != NULL) //統計每行詞數 nWords += CountWordsInOneLine(carrBuffer); } //關閉檔案 fclose(fp); return nWords; } int CountWordsInOneLine(const char *szLine) { int nWords = 0; int i=0; for (;i<strlen(szLine);i++) { if (*(szLine+i)!=' ') { nWords++; while ((*(szLine+i)!=' ')&&(*(szLine+i)!='\0')) { i++; } } } //printf("%d\t",nWords); return nWords; }
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<unistd.h> #include<stdlib.h> #define SERVER_PORT 165333 #define BUFFER_SIZE 1024 #define FILE_NAME_MAX_SIZE 512 int main() { // 宣告並初始化一個客戶端的socket地址結構 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); // 建立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); } // 繫結客戶端的socket和客戶端的socket地址結構 非必需 if(-1 == (bind(client_socket_fd, (struct sockaddr*)&client_addr, sizeof(client_addr)))) { perror("Client Bind Failed:"); exit(1); } // 宣告一個伺服器端的socket地址結構,並用伺服器那邊的IP地址及埠對其進行初始化,用於後面的連線 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); // 向伺服器發起連線,連線成功後client_socket_fd代表了客戶端和伺服器的一個socket連線 if(connect(client_socket_fd, (struct sockaddr*)&server_addr, server_addr_length) < 0) { perror("Can Not Connect To Server IP:"); exit(0); } // 輸入檔名 並放到緩衝區buffer中等待發送 char file_name[FILE_NAME_MAX_SIZE+1]; bzero(file_name, FILE_NAME_MAX_SIZE+1); printf("Please Input File Name On Server:\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)); // 向伺服器傳送buffer中的資料 if(send(client_socket_fd, buffer, BUFFER_SIZE, 0) < 0) { perror("Send File Name Failed:"); exit(1); } //int count=0; int length=0; bzero(buffer, BUFFER_SIZE); length = recv(client_socket_fd, buffer, BUFFER_SIZE, 0); buffer[length] = '\0'; printf("count=%s\n", buffer); bzero(buffer, BUFFER_SIZE); /* / 開啟檔案,準備寫入 / FILE *fp = fopen(file_name, "w"); if(NULL == fp) { printf("File:\t%s Can Not Open To Write\n", file_name); exit(1); } / 從伺服器接收資料到buffer中 / 每接收一段資料,便將其寫入檔案中,迴圈直到檔案接收完並寫完為止 bzero(buffer, BUFFER_SIZE); int length = 0; while((length = recv(client_socket_fd, buffer, BUFFER_SIZE, 0)) > 0) { if(fwrite(buffer, sizeof(char), length, fp) < length) { printf("File:\t%s Write Failed\n", file_name); break; } bzero(buffer, BUFFER_SIZE); } / 接收成功後,關閉檔案,關閉socket printf("Receive File:\t%s From Server IP Successful!\n", file_name); fclose(fp); */ close(client_socket_fd); return 0; }
執行結果
任務二
- 使用多執行緒實現wc伺服器並使用同步互斥機制保證計數正確
- 只需要改變任務一伺服器程式碼即可。
- 增加多執行緒
- 使用同步互斥
程式碼實現
2_serve.c
#include<stdlib.h>
#include<pthread.h>
#include<sys/socket.h>
#include<sys/types.h> //pthread_t , pthread_attr_t and so on.
#include<stdio.h>
#include<netinet/in.h> //structure sockaddr_in
#include<arpa/inet.h> //Func : htonl; htons; ntohl; ntohs
#include<assert.h> //Func :assert
#include<string.h> //Func :memset bzero
#include<unistd.h> //Func :close,write,read
#define SOCK_PORT 9988
#define BUFFER_LENGTH 1024
#define MAX_CONN_LIMIT 512 //MAX connection limit
static void Data_handle(void * sock_fd); //Only can be seen in the file
int CountWordsOfEuropeanTxtFile(char *szFileName);
int CountWordsInOneLine(const char *szLine);
int main()
{
int sockfd_server;
int sockfd;
int fd_temp;
struct sockaddr_in s_addr_in;
struct sockaddr_in s_addr_client;
int client_length;
sockfd_server = socket(AF_INET,SOCK_STREAM,0); //ipv4,TCP
assert(sockfd_server != -1);
//before bind(), set the attr of structure sockaddr.
memset(&s_addr_in,0,sizeof(s_addr_in));
s_addr_in.sin_family = AF_INET;
s_addr_in.sin_addr.s_addr = htonl(INADDR_ANY); //trans addr from uint32_t host byte order to network byte order.
s_addr_in.sin_port = htons(SOCK_PORT); //trans port from uint16_t host byte order to network byte order.
fd_temp = bind(sockfd_server,(const struct sockaddr *)(&s_addr_in),sizeof(s_addr_in));
if(fd_temp == -1)
{
fprintf(stderr,"bind error!\n");
exit(1);
}
fd_temp = listen(sockfd_server,MAX_CONN_LIMIT);
if(fd_temp == -1)
{
fprintf(stderr,"listen error!\n");
exit(1);
}
while(1)
{
printf("waiting for new connection...\n");
pthread_t thread_id;
client_length = sizeof(s_addr_client);
//Block here. Until server accpets a new connection.
sockfd = accept(sockfd_server,(struct sockaddr * restrict)(&s_addr_client),(socklen_t *)(&client_length));
if(sockfd == -1)
{
fprintf(stderr,"Accept error!\n");
continue; //ignore current socket ,continue while loop.
}
printf("A new connection occurs!\n");
if(pthread_create(&thread_id,NULL,(void *)(&Data_handle),(void *)(&sockfd)) == -1)
{
fprintf(stderr,"pthread_create error!\n");
break; //break while loop
}
}
//Clear
int ret = shutdown(sockfd_server,SHUT_WR); //shut down the all or part of a full-duplex connection.
assert(ret != -1);
printf("Server shuts down\n");
return 0;
}
static void Data_handle(void * sock_fd)
{
int fd = *((int *)sock_fd);
int i_recvBytes;
char data_recv[BUFFER_LENGTH];
const char * data_send = "Server has received your request!\n";
while(1)
{
printf("waiting for file_name...\n");
//Reset data.
memset(data_recv,0,BUFFER_LENGTH);
i_recvBytes = read(fd,data_recv,BUFFER_LENGTH);
if(i_recvBytes == 0)
{
printf("Maybe the client has closed\n");
break;
}
if(i_recvBytes == -1)
{
fprintf(stderr,"read error!\n");
break;
}
if(strcmp(data_recv,"quit")==0)
{
printf("Quit command!\n");
break; //Break the while loop.
}
printf("read from client : %s\n",data_recv);
char buffer[BUFFER_LENGTH];
int count=0;
bzero(buffer, BUFFER_LENGTH);
count = CountWordsOfEuropeanTxtFile(data_recv);
sprintf(buffer,"%d", count);
send(fd, buffer, sizeof(buffer), 0);
if(write(fd,data_send,strlen(data_send)) == -1)
{
break;
}
}
//Clear
printf("terminating current client_connection...\n");
close(fd); //close a file descriptor.
pthread_exit(NULL); //terminate calling thread!
}
int CountWordsOfEuropeanTxtFile(char *szFileName)
{
int nWords = 0;//詞計數變數,初始值為0
FILE *fp; //檔案指標
char carrBuffer[1024];//每行字元緩衝,每行最多1024個字元
//開啟檔案
if ((fp = fopen(szFileName, "r")) == NULL)
{
return -1; //檔案開啟不成功是返回-1
}
while (!feof(fp))//如果沒有讀到檔案末尾
{
//從檔案中讀一行
if (fgets(carrBuffer, sizeof(carrBuffer),fp) != NULL)
//統計每行詞數
nWords += CountWordsInOneLine(carrBuffer);
}
//關閉檔案
fclose(fp);
return nWords;
}
int CountWordsInOneLine(const char *szLine)
{
int nWords = 0;
int i=0;
for (;i<strlen(szLine);i++)
{
if (*(szLine+i)!=' ')
{
nWords++;
while ((*(szLine+i)!=' ')&&(*(szLine+i)!='\0'))
{
i++;
}
}
}
//printf("%d\t",nWords);
return nWords;
}
2_client
#include<stdlib.h>
#include<sys/socket.h>
#include<sys/types.h> //pthread_t , pthread_attr_t and so on.
#include<stdio.h>
#include<netinet/in.h> //structure sockaddr_in
#include<arpa/inet.h> //Func : htonl; htons; ntohl; ntohs
#include<assert.h> //Func :assert
#include<string.h> //Func :memset bzero
#include<unistd.h> //Func :close,write,read
#define SOCK_PORT 9988
#define BUFFER_LENGTH 1024
int main()
{
int sockfd;
int tempfd;
struct sockaddr_in s_addr_in;
char data_send[BUFFER_LENGTH];
char data_recv[BUFFER_LENGTH];
memset(data_send,0,BUFFER_LENGTH);
memset(data_recv,0,BUFFER_LENGTH);
sockfd = socket(AF_INET,SOCK_STREAM,0); //ipv4,TCP
if(sockfd == -1)
{
fprintf(stderr,"socket error!\n");
exit(1);
}
//before func connect, set the attr of structure sockaddr.
memset(&s_addr_in,0,sizeof(s_addr_in));
s_addr_in.sin_addr.s_addr = inet_addr("127.0.0.1"); //trans char * to in_addr_t
s_addr_in.sin_family = AF_INET;
s_addr_in.sin_port = htons(SOCK_PORT);
tempfd = connect(sockfd,(struct sockaddr *)(&s_addr_in),sizeof(s_addr_in));
if(tempfd == -1)
{
fprintf(stderr,"Connect error! \n");
exit(1);
}
while(1)
{
printf("Please Input File Name On Server(input \"quit\" to quit):\t");
scanf("%s", data_send);
//gets(data_send);
//scanf("%[^\n]",data_send); //or you can also use this
tempfd = write(sockfd,data_send,BUFFER_LENGTH);
if(tempfd == -1)
{
fprintf(stderr,"write error\n");
exit(0);
}
if(strcmp(data_send,"quit") == 0) //quit,write the quit request and shutdown client
{
break;
}
else
{
tempfd = read(sockfd,data_recv,BUFFER_LENGTH);
assert(tempfd != -1);
printf("%s\n",data_recv);
memset(data_send,0,BUFFER_LENGTH);
memset(data_recv,0,BUFFER_LENGTH);
}
char buffer[BUFFER_LENGTH];
int length=0;
bzero(buffer, BUFFER_LENGTH);
length = recv(sockfd, buffer, BUFFER_LENGTH, 0);
buffer[length] = '\0';
printf("count=%s\n", buffer);
bzero(buffer, BUFFER_LENGTH);
}
int ret = shutdown(sockfd,SHUT_WR); //or you can use func close()--<unistd.h> to close the fd
assert(ret != -1);
return 0;
}
執行結果