server2.cpp

此代码为socket通信程序

#include"Winsock.h"
#include"Windows.h"
#include"stdio.h"
#pragma comment(lib,"wsock32.lib")
#define RECV_PORT 2000
#define SEND_PORT 3000
#define MAX_FILESIZE 32*1024

SOCKET sock,sock1;
SOCKADDR_IN ServerAddr;
SOCKADDR_IN ClientAddr;

struct Filedata
{
	char ffname[30];
	char ffdata[MAX_FILESIZE];
	int len;
}DataPacket;
int Addrlen;

DWORD StartSock()
{
   WSADATA WSAData;
   if(WSAStartup(MAKEWORD(2,2),&WSAData)!=0)  //初始化套接字
   {
	   printf("sock init fail!\n");
	   return(-1);
   }
   return(1);
}

DWORD CreateSocket()
{
	sock=socket(AF_INET,SOCK_STREAM,0);  //创建套接字
	if(sock==SOCKET_ERROR)
	{
		printf("sock create fail!\n");
		WSACleanup();
		return(-1);
	}
	ServerAddr.sin_family=AF_INET; //填充服务器地址及端口号
	ServerAddr.sin_addr.s_addr=htonl(INADDR_ANY);
	ServerAddr.sin_port=htons(RECV_PORT);
	if(bind(sock,(struct sockaddr FAR *)&ServerAddr,sizeof(ServerAddr))==SOCKET_ERROR)
	{
		printf("bind is the error");
		return(-1);
	}
	return(1);
}


DWORD WriteFile(char * fname,char *fdata,int flen)
{
	int i;
	FILE *fp;
	fp=fopen(fname,"w");  //以写方式打开一些文件
	if(fp==NULL)
	{
		printf("cannot open this file!\n");
	}
	i=0;
	for(i=0;i<flen;i++)
	{
		fputc(fdata[i],fp);
	}
	fclose(fp);
	return(1);
}



DWORD ConnectProcess()
{
	//char buff[80];
	Addrlen=sizeof(sockaddr_in);
	if(listen(sock,5)<0)
	{
		printf("listen error");
		return(-1);
	}
	printf("listening...\n");
	for(;;)
	{
		sock1=accept(sock,(struct sockaddr FAR *)&ClientAddr,&Addrlen);
         for(;;)
		 {
			 memset(DataPacket.ffname,0,30);
             memset(DataPacket.ffdata,0,MAX_FILESIZE);
             DataPacket.len=0;
			 if(recv(sock1,(char *)&DataPacket,sizeof(DataPacket),0)<=0)
			 {
				 break;
			 }
   
			 printf("Has receivedfile:%s,length is: %d",DataPacket.ffname,DataPacket.len);
			 printf("\n");
	    	 char filename[30];
            printf("please input the filepath and filename:");
			 printf("\n");
			 scanf("%s",filename);
			 WriteFile(filename,DataPacket.ffdata,DataPacket.len);//写文件	 

			 printf("\n");
	      printf("Write file success!!");
		 }
	}
}

int main()
{
	if(StartSock()==-1)
		return(-1);
    if(CreateSocket()==-1)
		return(-1);
    if(ConnectProcess()==-1)
		return(-1);

	return(1);
}