实验三 实时系统

Posted 2021-01-20 x20165335

实验内容：

编写程序，实现Linux下的socket编程

代码:

#include <stdio.h>

 #include <sys/socket.h>

 #include <sys/types.h>

 #include <stdlib.h>

 #include <netinet/in.h>

 #include <errno.h>

 #include <string.h>

 #include <arpa/inet.h>

 #include <unistd.h>

 #define MAXLINE 1024

 int main(int argc,char **argv)

 {

 char *servInetAddr = "127.0.0.1";

 int socketfd;

 struct sockaddr_in sockaddr;

 char recvline[MAXLINE], sendline[MAXLINE];

 int n;

 printf(“inpute the message ");

 if(argc != 2)

 {

 printf("client connect success ");

 exit(0);

 }

 

 socketfd = socket(AF_INET,SOCK_STREAM,0);

 memset(&sockaddr,0,sizeof(sockaddr));

 sockaddr.sin_family = AF_INET;

 sockaddr.sin_port = htons(10004);

 inet_pton(AF_INET,servInetAddr,&sockaddr.sin_addr)

 if((connect(socketfd,(struct sockaddr*)&sockaddr,sizeof(sockaddr))) < 0 )

 {

 printf("connect error %s errno: %d ",strerror(errno),errno);

 exit(0);

 }

 

 printf("send message to server ");

 

 fgets(sendline,1024,stdin);

 

 if((send(socketfd,sendline,strlen(sendline),0)) < 0)

 {

 printf("send mes error: %s errno : %d",strerror(errno),errno);

 exit(0);

 }

 

 close(socketfd);

 printf("exit ");

 exit(0);

 }

 

 

#include <stdio.h>

 #include <sys/socket.h>

 #include <sys/types.h>

 #include <string.h>

 #include <netinet/in.h>

 #include <stdlib.h>

 #include <errno.h>

 #include <unistd.h>

 #include <arpa/inet.h>

 

 #define MAXLINE 1024

 int main(int argc,char **argv)

 {

 int listenfd,connfd;

 struct sockaddr_in sockaddr;

 char buff[MAXLINE];

 int n;

 

 memset(&sockaddr,0,sizeof(sockaddr));

 

 sockaddr.sin_family = AF_INET;

 sockaddr.sin_addr.s_addr = htonl(INADDR_ANY);

 sockaddr.sin_port = htons(10004);

 

 listenfd = socket(AF_INET,SOCK_STREAM,0);

 

 bind(listenfd,(struct sockaddr *) &sockaddr,sizeof(sockaddr));

 

 listen(listenfd,1024);

 for(;;)

 {

 if((connfd = accept(listenfd,(struct sockaddr*)NULL,NULL))==-1)

 {

 printf("accpet socket error: %s errno :%d ",strerror(errno),errno);

 continue;

 }

 

 n = recv(connfd,buff,MAXLINE,0);

 buff[n] = ‘‘;

 printf("recv msg from client:%s",buff);

 close(connfd);

 }

 close(listenfd);

 }

 

实现截图：

　　二 多线程实现

　　　　实现代码：

#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

#include <unistd.h>

/*

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <unistd.h>

*/

#define HELLO_WORLD_SERVER_PORT    6666

#define LENGTH_OF_LISTEN_QUEUE 20

#define BUFFER_SIZE 1024

#define FILE_NAME_MAX_SIZE 512

#define FILE_WORDS_NUMBER 32

int wc_func(char *file_name);

int main(int argc, char **argv)

{

    //设置一个socket地址结构server_addr,代表服务器internet地址, 端口

    struct sockaddr_in server_addr;

    bzero(&server_addr,sizeof(server_addr)); //把一段内存区的内容全部设置为0

    server_addr.sin_family = AF_INET;

    server_addr.sin_addr.s_addr = htons(INADDR_ANY);

    server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);

 

    //创建用于internet的流协议(TCP)socket,用server_socket代表服务器socket

    int server_socket = socket(PF_INET,SOCK_STREAM,0);

    if( server_socket < 0)

    {

        printf("Create Socket Failed!");

        exit(1);

    }

   

    //把socket和socket地址结构联系起来

    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);

    }

    while (1) //服务器端要一直运行

    {

        //定义客户端的socket地址结构client_addr

        struct sockaddr_in client_addr;

        socklen_t length = sizeof(client_addr);

 

        //接受一个到server_socket代表的socket的一个连接

        //如果没有连接请求,就等待到有连接请求--这是accept函数的特性

        //accept函数返回一个新的socket,这个socket(new_server_socket)用于同连接到的客户的通信

        //new_server_socket代表了服务器和客户端之间的一个通信通道

        //accept函数把连接到的客户端信息填写到客户端的socket地址结构client_addr中

        int new_server_socket = accept(server_socket,(struct sockaddr*)&client_addr,&length);

        if ( new_server_socket < 0)

        {

            printf("Server Accept Failed! ");

            break;

        }

       

    char file_name[FILE_NAME_MAX_SIZE+1];

    bzero(file_name, FILE_NAME_MAX_SIZE+1);

    char buffer[BUFFER_SIZE];

    bzero(buffer,BUFFER_SIZE);

    recv(new_server_socket,file_name,BUFFER_SIZE,0);

   

   

    FILE * fp = fopen(file_name,"w");

    if(NULL == fp )

    {

        printf("File: %s Can Not Open To Write ", file_name);

        exit(1);

    }

   

    //从客户端接收数据到buffer中

    bzero(buffer,BUFFER_SIZE);

    int len = 0;

    while( len = recv(new_server_socket,buffer,BUFFER_SIZE,0))

    {

        if(len < 0)

        {

            printf("Recieve Data From Client %s Failed! ", argv[1]);

            break;

        }

 

        int write_length = fwrite(buffer,sizeof(char),len,fp);

        if (write_length<len)

        {

            printf("File: %s Write Failed ", file_name);

            break;

        }

        bzero(buffer,BUFFER_SIZE);   

    }

    printf("File: %s Transfer Finished! ",file_name);

   

    fclose(fp);

   

    //关闭与客户端的连接

    close(new_server_socket);

    }

    //关闭监听用的socket

    close(server_socket);

    return 0;

}

 

#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

#include <unistd.h>

/*

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <unistd.h>

*/

 

#define HELLO_WORLD_SERVER_PORT    6666

#define BUFFER_SIZE 1024

#define FILE_NAME_MAX_SIZE 512

#define FILE_WORDS_NUMBER 32

int main(int argc, char **argv)

{

    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internet地址, 端口

    struct sockaddr_in client_addr;

    bzero(&client_addr,sizeof(client_addr)); //把一段内存区的内容全部设置为0

    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);    //0表示让系统自动分配一个空闲端口

    //创建用于internet的流协议(TCP)socket,用client_socket代表客户机socket

    int client_socket = socket(AF_INET,SOCK_STREAM,0);

    if( client_socket < 0)

    {

        printf("Create Socket Failed! ");

        exit(1);

    }

    //把客户机的socket和客户机的socket地址结构联系起来

    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, 端口

    struct sockaddr_in server_addr;

    bzero(&server_addr,sizeof(server_addr));

    server_addr.sin_family = AF_INET;

    if(inet_aton(argv[1],&server_addr.sin_addr) == 0) //服务器的IP地址来自程序的参数

    {

        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,连接成功后client_socket代表了客户机和服务器的一个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, 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

    send(client_socket,buffer,BUFFER_SIZE,0);

 

    FILE * fp = fopen(file_name,"r");

    if(NULL == fp )

    {

        printf("File: %s Not Found ", file_name);

        exit(1);

    }

    else

    {

            bzero(buffer, BUFFER_SIZE);

            int file_block_length = 0;

            while( (file_block_length = fread(buffer,sizeof(char),BUFFER_SIZE, fp))>0)

            {

                //printf("file_block_length = %d ",file_block_length);

                //发送buffer中的字符串到服务器

                if(send(client_socket,buffer,file_block_length,0)<0)

                {

                    printf("Send File: %s Failed ", file_name);

                    break;

                }

                bzero(buffer, BUFFER_SIZE);

            }

    }

   

    printf("Send File: %s To Server[%s] Finished ",file_name, argv[1]);

      

    printf("The File has %d words. ", wc_func(file_name));

    fclose(fp);

 

    //关闭socket

    close(client_socket);

    return 0;

}

int wc_func(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 ",file_name);

              return;

       }

       while((t=fgetc(in))!=EOF)

       {

             

              if(t==‘ ‘||t==‘ ‘||t==‘ ‘) {

                          state = 0;

                          continue;

               } else {

                          if(state == 0) {

                       state = 1;

                       w++;

                    }

                          continue;

               }

       }

       return w;

}

 

运行结果：