芙蓉妹妹 - 云代码空间
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#define PORT 8888
#define LISTENQ 20
#define BUFFSIZE 4096
#define FILE_NAME_MAX_SIZE 512
int passiveTCP (const int service){
//Create socket
int sockfd,connfd;
struct sockaddr_in svraddr,clientaddr;
bzero(&svraddr,sizeof(svraddr));
svraddr.sin_family=AF_INET;
svraddr.sin_addr.s_addr=htonl(INADDR_ANY);
svraddr.sin_port=htons(PORT);
sockfd=socket(AF_INET,SOCK_STREAM,0);
if(sockfd<0)
{
perror("socket");
exit(1);
}
if(bind(sockfd,(struct sockaddr*)&svraddr,sizeof(svraddr))<0) //bind
{
perror("bind");
exit(1);
}
if(listen(sockfd,LISTENQ)<0)//listen
{
perror("listen");
exit(1);
}
return sockfd;
}
int main(int argc, char **argv[])
{
//Input the file name
char filename[FILE_NAME_MAX_SIZE];
bzero(filename,FILE_NAME_MAX_SIZE);
printf("Please input the file name you wana to send:");
scanf("%s",filename);
getchar();
int sockfd,connfd;
struct sockaddr_in clientaddr;
sockfd = passiveTCP(PORT);
while(1)
{
socklen_t length=sizeof(clientaddr);
connfd=accept(sockfd,(struct sockaddr*)&clientaddr,&length);//accept
if(connfd<0)
{
perror("connect");
exit(1);
}
//send file imformation
char buff[BUFFSIZE];
int count;
bzero(buff,BUFFSIZE);
strncpy(buff,filename,strlen(filename)>FILE_NAME_MAX_SIZE?FILE_NAME_MAX_SIZE:strlen(filename));
count=send(connfd,buff,BUFFSIZE,0);
if(count<0)
{
perror("Send file information");
exit(1);
}
FILE *fd=fopen(filename,"rb");//read file
if(fd==NULL)
printf("File :%s not found!\n",filename);
else
{
bzero(buff,BUFFSIZE);
int file_block_length=0;
while((file_block_length=fread(buff,sizeof(char),BUFFSIZE,fd))>0)
{
printf("file_block_length:%d\n",file_block_length);
if(send(connfd,buff,file_block_length,0)<0)
{
perror("Send");
exit(1);
}
bzero(buff,BUFFSIZE);
}
fclose(fd);
printf("Transfer file finished !\n");
}
close(connfd);
}
close(sockfd);
return 0;
}
#include <stdlib.h>
#include <winsock2.h>
#include <stdio.h>
#define IP "192.168.91.128" //在一台计算机上测试，IP为Linux服务器地址
#define PORT 8888 /注意：客户端设置通信的端口 = 服务端的端口
#define BUFFER_SIZE 1024 //数据发送缓冲区大小
#define LISTENQ 20
#define BUFFSIZE 4096
#define FILE_NAME_MAX_SIZE 512
void recvTCP(int clientfd){
//recv file imformation
char buff[BUFFSIZE];
char filename[FILE_NAME_MAX_SIZE];//文件名称
int count;
memset(buff,0,BUFFSIZE);//把buff中前BUFFSIZE个字改成0。清空地址结构
count=recv(clientfd,buff,BUFFSIZE,0);//从clientfd套接字中接受数据，存在长度为BUFFSIZE的buff中，最后一个参数一般为0；recv函数仅仅是copy数据，真正的接收数据是协议来完成的，返回其实际copy的字节数；如果recv在copy时出错，那么它返回SOCKET_ERROR；
if(count<0)
{
perror("recv");
exit(1);
}
count = strlen(buff) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buff) ; //传输文件名的长度
memcpy(filename,buff,count);//把buff所指向的字符串中以buff地址开始的前若干（最后一个参数长）个字节复制到filename所指的数组中，并返回被复制后的filename
filename[count] = '\0';//如果buff长度小于filename长度，只是将buff前count个字符复制过去，不自动添加'\0'，需手动添加
printf("Preparing recv file : %s \n",filename);
//recv file
FILE *fd=fopen(filename,"wb+");//打开文件
if(NULL==fd)
{
perror("open");
exit(1);
}
memset(buff,0,BUFFSIZE);//清空地址结构，准备接受文件内容
int length=0;
while(length=recv(clientfd,buff,BUFFSIZE,0))//接受
{
if(length<0)
{
perror("recv");
exit(1);
}
int writelen=fwrite(buff,sizeof(char),length,fd);//往文件里写内容
if(writelen<length)
{
perror("write");
exit(1);
}
memset(buff,0,BUFFSIZE);//清空地址结构
}
printf("Receieved file: %s finished!\n",filename);
fclose(fd);
}
int connectTCP(const char *host, const int port){
WSADATA WSAData;
if(WSAStartup(MAKEWORD(2,0),&WSAData)==SOCKET_ERROR) //WSAStartup()函数对Winsock DLL进行初始化
{
printf("Socket initialize fail!\n");
//continue;
}
SOCKET sock; //客户端进程创建套接字
if((sock=socket(AF_INET,SOCK_STREAM,0))==SOCKET_ERROR) //创建流套接字（与服务端保持一致）
{
printf("Socket create fail!\n");
WSACleanup();
//continue;
}
struct sockaddr_in ClientAddr; //sockaddr_in结构用来标识TCP/IP协议下的地址，可强制转换为sockaddr结构
ClientAddr.sin_family=AF_INET; //指Internet域,地址类型为AF_INET
ClientAddr.sin_port=htons(PORT); //指定服务端所预留的端口
ClientAddr.sin_addr.s_addr=inet_addr(IP); //指定服务端所绑定的IP地址 if(connect(sock,(LPSOCKADDR)&ClientAddr,sizeof(ClientAddr))==SOCKET_ERROR) //调用connect()函数，向服务器进程发出连接请求
{
printf("Connect fail!\n");
closesocket(sock);
WSACleanup();
//continue;
}
return sock;
}
int main()
{
SOCKET sock; //客户端进程创建套接字
char buf[BUFFER_SIZE]; //buf数组存放客户端发送的消息
int inputLen; //用于输入字符自增变量
while(1)
{
printf("Socket\\Client>");
inputLen=0;
memset(buf,0,sizeof(buf));//清空地址结构
while((buf[inputLen++]=getchar())!='\n') //输入以回车键为结束标识
{
;
}
if(buf[0]=='e' && buf[1]=='x' && buf[2]=='i' && buf[3]=='t')
{
printf("The End.\n");
break;
}
sock=connectTCP(IP,PORT);
recvTCP(sock);
closesocket(sock); //关闭套接字
WSACleanup(); //终止对Winsock DLL的使用，并释放资源，以备下一次使用
}
return 0;
}
