win32 TCP网络文件传输服务器端1.23

#include<windows.h>
#include<stdio.h>
#include<stdlib.h>

#pragma comment(lib,"ws2_32.lib")

#define PORT 6666
#define IPADDR "127.0.0.1"
#define BACKLOG 20

int main(void)
{

	WSADATA wsadata;
	WSAStartup(MAKEWORD(2,0),&wsadata);
	SOCKET sock_trans=socket(AF_INET,SOCK_STREAM,0);

	if (sock_trans<0)
	{

	perror("socket");
	exit(1);

	}

	SOCKADDR_IN saddr;
	saddr.sin_family=AF_INET;
	saddr.sin_port=htons(PORT);
	saddr.sin_addr.S_un.S_addr=inet_addr(IPADDR);

	int sadlen=sizeof(saddr);

	FILE* fp=NULL;
	fp=fopen("e://test.txt","w+");
	if(fp==NULL)
	{

	perror("open file:");
	exit(4);
	}

	if (bind(sock_trans,(SOCKADDR*)(&saddr),sadlen)==SOCKET_ERROR)
	{

	perror("bind:");
	exit(2);

	}
	else printf ("bind port ok!\n");

	//int vlisten=50;

	if (listen(sock_trans,20)==SOCKET_ERROR)

	{
	perror("listen");
	exit(3);
	}

	else
	printf ("now listenning.....\n");

	//printf ("%d",listen(sock_trans,20));

	int saddrlen=sizeof(saddr);

	SOCKET newsock=accept(sock_trans,(SOCKADDR*)&saddr,&saddrlen);

	printf ("catch file now....");
	char buf[1024]={0};
	ZeroMemory(buf,1024);

	int relen=0;

	//测试程序的酱油语句，无视之。

	//recv(newsock,buf,50,0);

	// printf ("%s",buf);

	// printf ("\nif put this line ,the program is error!");

	Sleep(3000);

	while(1)

	{

	relen=recv(newsock,buf,1024,0);

	fwrite(buf,1,relen,fp);
	printf("接受了一次！\n");


	fflush(fp);

	//ZeroMemory(buf,50);

	if (relen==0)

	{

	break;

	}
	printf("接受了%d次！\n",relen);

	}

	fclose(fp);

	closesocket(newsock);
	closesocket(sock_trans);
	WSACleanup();

	system("pause")

	return 0;

}