myftp.h

linux ftp c port linux ftp c port linux ftp c port linux ftp c port

int verbose = 1;
FILE *ftpio = NULL;
char buf[4096];

int ftpcmd(int sockftp,char *fmt,...)
{  
	va_list vp;  
	int err,len;  
	if (ftpio == NULL)  
	{  
		ftpio = fdopen(sockftp, "r");  
		if (ftpio == NULL)  
			return -1;  
	}  
	if (fmt)  
	{  
		va_start(vp,fmt);  
		len = vsprintf(buf,fmt,vp);  
		buf[len++] = '\r';  
		buf[len++] = '\n';  
		write(sockftp,buf,len);  
		if (verbose)  
		{
			write(1,buf,len);  
		}
	}  
	do  
	{  
		if (fgets(buf,sizeof(buf),ftpio) == NULL)
		{
			return -1;  
		}
		if (verbose)
		{  
			printf (buf);  
		}
	}
	while(buf[3] == '-');  
	
	sscanf(buf, "%d",&err);  
	return err;
}

int ftp(char *host,int port,char *user,char *pass,char *filename,char *savefile,char *path)
{  
	int sockftp = -1,sockdata = -1,sockxfer = -1; 
	struct sockaddr_in addr;  
	unsigned long hostip;  
	int len,tmp,err;  
	int retval = -1;  
	int savefd;  
	unsigned char *c,*p;  
	struct hostent *he;  
	hostip = inet_addr(host);
	if (hostip == -1)  
	{  
		he = gethostbyname(host); 
		if (he == NULL)
		{
			return   -1;
		}
		hostip = * (unsigned long *)he->h_addr;
	}

	sockftp =  socket(AF_INET,SOCK_STREAM,0);  
	if (sockftp == -1)  
	{
		goto out;
	}

	addr.sin_family = PF_INET;  
	addr.sin_port = htons(port);  
	addr.sin_addr.s_addr = hostip;  
	if (connect(sockftp,(struct sockaddr *)&addr,sizeof(addr)) == -1)
	{
		goto out;
	}
	err = ftpcmd(sockftp,NULL);  
	if (err != 220)
	{
		goto out;
	}
	err = ftpcmd(sockftp, "USER %s ",user);
	if (err != 331)
	{ 
		goto out;  
	}
	err = ftpcmd(sockftp, "PASS %s ",pass);  
	if (err !=  230)  
	{
		goto out;
	}
	err = ftpcmd(sockftp, "TYPE I ");  
	if (err != 200)  
	{
		goto out;  
	}
	sockdata = socket(AF_INET,SOCK_STREAM,0);
	if (sockdata == -1)  
	{
		goto out;  
	}
	tmp = sizeof(addr);  
	getsockname(sockftp,(struct sockaddr *)&addr,&tmp);  
	addr.sin_port = 0;  
	if (bind(sockdata,(struct sockaddr *)&addr,sizeof(addr)) == -1)  
	{
		goto out;  
	}
	if (listen(sockdata,1) == -1) 
	{ 
		goto out;  
	}
	tmp = sizeof(addr);  
	getsockname(sockdata,(struct sockaddr *)&addr,&tmp);  
	c = (unsigned char *)&addr.sin_addr;  
	p = (unsigned char *)&addr.sin_port;  
	err = ftpcmd(sockftp, "PORT %d,%d,%d,%d,%d,%d ", c[0],c[1],c[2],c[3],p[0],p[1]);  
	if (err != 200)
	{
		goto out;  
	}
	err = ftpcmd(sockftp, "CWD %s",path);
	if (err != 250)  
	{
		goto out;  
	}
	err = ftpcmd(sockftp, "LIST");
	if (err != 150)  
	{
		goto out;  
	}
	printf("\n\n成功收录主机：%s，路径：%s\n\n",host,path);
	tmp = sizeof(addr);  
	sockxfer = accept(sockdata,(struct sockaddr *)&addr,&tmp);  
	if (sockxfer == -1)  
	{
		goto out;  
	}
	remove(savefile);
	savefd = open(savefile,O_WRONLY|O_CREAT,0644); 
	if (savefd == -1)
	{
		goto out;  
	}
	retval = 0;
	
	while ((len=read(sockxfer,buf,sizeof(buf)))> 0)  
	{    
		write (savefd,buf,len);
		retval += len;  
	};
	close (savefd);
out:  
	close (sockxfer);  
	close (sockdata);  
	close (sockftp);  
	if (ftpio)  
	{  
		fclose(ftpio);  
		ftpio = NULL;  
	}
	return retval;
}