ftpsrvr.c

/* ftpsrvr.c */

/* Synchronet FTP server */

/* $Id$ */

/****************************************************************************
 * @format.tab-size 4		(Plain Text/Source Code File Header)			*
 * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
 *																			*
 * Copyright 2000 Rob Swindell - http://www.synchro.net/copyright.html		*
 *																			*
 * This program is free software; you can redistribute it and/or			*
 * modify it under the terms of the GNU General Public License				*
 * as published by the Free Software Foundation; either version 2			*
 * of the License, or (at your option) any later version.					*
 * See the GNU General Public License for more details: gpl.txt or			*
 * http://www.fsf.org/copyleft/gpl.html										*
 *																			*
 * Anonymous FTP access to the most recent released source is available at	*
 * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net	*
 *																			*
 * Anonymous CVS access to the development source and modification history	*
 * is available at cvs.synchro.net:/cvsroot/sbbs, example:					*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs login			*
 *     (just hit return, no password is necessary)							*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
 *																			*
 * For Synchronet coding style and modification guidelines, see				*
 * http://www.synchro.net/source.html										*
 *																			*
 * You are encouraged to submit any modifications (preferably in Unix diff	*
 * format) via e-mail to mods@synchro.net									*
 *																			*
 * Note: If this box doesn't appear square, then you need to fix your tabs.	*
 ****************************************************************************/

/* Platform-specific headers */
#ifdef _WIN32

	#include <share.h>		/* SH_DENYNO */
	#include <direct.h>		/* _mkdir/_rmdir() */
	#include <process.h>	/* _beginthread */
	#include <windows.h>	/* required for mmsystem.h */
	#include <mmsystem.h>	/* SND_ASYNC */

#elif defined(__unix__)

	#include <signal.h>		/* signal/SIGPIPE */

#endif


/* ANSI C Library headers */
#include <stdio.h>
#include <stdlib.h>			/* ltoa in GNU C lib */
#include <stdarg.h>			/* va_list, varargs */
#include <string.h>			/* strrchr */
#include <fcntl.h>			/* O_WRONLY, O_RDONLY, etc. */
#include <errno.h>			/* EACCES */
#include <ctype.h>			/* toupper */
#include <sys/stat.h>		/* S_IWRITE */

/* Synchronet-specific headers */
#include "sbbs.h"
#include "ftpsrvr.h"
#include "telnet.h"

/* Constants */

#define FTP_VERSION				"1.02"

#define ILLEGAL_FILENAME_CHARS	"\\/|<>+[]:=\";,%"

#define STATUS_WFC				"Listening"

#define BBS_VIRTUAL_PATH		"bbs:/""/"	/* this is actually bbs:<slash><slash> */
#define LOCAL_FSYS_DIR			"local:"
#define BBS_FSYS_DIR			"bbs:"

#define TIMEOUT_THREAD_WAIT		60		/* Seconds */

#define XFER_REPORT_INTERVAL	60		/* Seconds */

#define INDEX_FNAME_LEN			15

#define	NAME_LEN				15		/* User name length for listings */

static const char *mon[]={"Jan","Feb","Mar","Apr","May","Jun"
            ,"Jul","Aug","Sep","Oct","Nov","Dec"};

BOOL direxist(char *dir)
{
	if(access(dir,0)==0)
		return(TRUE);
	else
		return(FALSE);
}

BOOL dir_op(scfg_t* cfg, user_t* user, uint dirnum)
{
	return(user->level>=SYSOP_LEVEL || user->exempt&FLAG('R')
		|| (cfg->dir[dirnum]->op_ar[0] && chk_ar(cfg,cfg->dir[dirnum]->op_ar,user)));
}

static ftp_startup_t* startup=NULL;
static scfg_t	scfg;
static SOCKET	server_socket=INVALID_SOCKET;
static DWORD	active_clients=0;
static DWORD	sockets=0;
static HANDLE	socket_mutex=NULL;

typedef struct {
	SOCKET			socket;
	SOCKADDR_IN		client_addr;
} ftp_t;

static int lprintf(char *fmt, ...)
{
	int		result;
	va_list argptr;
	char sbuf[1024];

    if(startup!=NULL && startup->lputs==NULL)
        return(0);
    va_start(argptr,fmt);
    vsprintf(sbuf,fmt,argptr);
    va_end(argptr);
    result=startup->lputs(sbuf);

	return(result);
}

#ifdef _WINSOCKAPI_

static WSADATA WSAData;
static BOOL WSAInitialized=FALSE;

static BOOL winsock_startup(void)
{
	int		status;             /* Status Code */

    if((status = WSAStartup(MAKEWORD(1,1), &WSAData))==0) {
		lprintf("%s %s",WSAData.szDescription, WSAData.szSystemStatus);
		WSAInitialized=TRUE;
		return (TRUE);
	}

    lprintf("!WinSock startup ERROR %d", status);
	return (FALSE);
}

#else /* No WINSOCK */

#define winsock_startup()	(TRUE)

#endif

static void status(char* str)
{
	if(startup!=NULL && startup->status!=NULL)
	    startup->status(str);
}

static void update_clients(void)
{
	if(startup!=NULL && startup->clients!=NULL)
		startup->clients(active_clients);
}

static void client_on(SOCKET sock, client_t* client)
{
	if(startup!=NULL && startup->client_on!=NULL)
		startup->client_on(TRUE,sock,client);
}

static void client_off(SOCKET sock)
{
	if(startup!=NULL && startup->client_on!=NULL)
		startup->client_on(FALSE,sock,NULL);
}

static void thread_up(void)
{
	if(startup!=NULL && startup->thread_up!=NULL)
		startup->thread_up(TRUE);
}

static void thread_down(void)
{
	if(startup!=NULL && startup->thread_up!=NULL)
		startup->thread_up(FALSE);
}

static SOCKET open_socket(int type)
{
	SOCKET sock;

	sock=socket(AF_INET, type, IPPROTO_IP);
	if(sock!=INVALID_SOCKET && startup!=NULL && startup->socket_open!=NULL) 
		startup->socket_open(TRUE);
	if(sock!=INVALID_SOCKET) {
		sockets++;
#ifdef _DEBUG
		lprintf("%04d Socket opened (%d sockets in use)",sock,sockets);
#endif
	}
	return(sock);
}

#ifdef __BORLANDC__
#pragma argsused
#endif
static int close_socket(SOCKET* sock, int line)
{
	int		result;

#ifndef _WIN32
#define ReleaseMutex(x)
#else
	if((result=WaitForSingleObject(socket_mutex,5000))!=WAIT_OBJECT_0) 
		lprintf("%04d !ERROR %d getting socket mutex from line %d"
			,*sock,ERROR_VALUE,line);

	if(IsBadWritePtr(sock,sizeof(SOCKET))) {
		ReleaseMutex(socket_mutex);
		lprintf("0000 !BAD socket pointer in close_socket from line %d",line);
		return(-1);
	}
#endif
	if((*sock)==INVALID_SOCKET) {
		ReleaseMutex(socket_mutex);
		lprintf("0000 !INVALID_SOCKET in close_socket from line %d",line);
		return(-1);
	}

	shutdown(*sock,SHUT_RDWR);	/* required on Unix */

	result=closesocket(*sock);
	if(/* result==0 && */ startup!=NULL && startup->socket_open!=NULL) 
		startup->socket_open(FALSE);

	sockets--;

	if(result!=0)
		lprintf("%04d !ERROR %d closing socket from line %d",*sock,ERROR_VALUE,line);
	else {
#ifdef _DEBUG
		lprintf("%04d Socket closed (%d sockets in use) from line %d",*sock,sockets,line);
#endif
	}
	*sock=INVALID_SOCKET;
	ReleaseMutex(socket_mutex);

	return(result);
}

static int sockprintf(SOCKET sock, char *fmt, ...)
{
	int		len;
	int		result;
	va_list argptr;
	char	sbuf[1024];

    va_start(argptr,fmt);
    len=vsprintf(sbuf,fmt,argptr);
	if(startup->options&FTP_OPT_DEBUG_TX)
		lprintf("%04d TX: %s", sock, sbuf);
	strcat(sbuf,"\r\n");
	len+=2;
    va_end(argptr);
	while((result=send(sock,sbuf,len,0))!=len) {
		if(result==SOCKET_ERROR) {
			if(ERROR_VALUE==EWOULDBLOCK) {
				mswait(1);
				continue;
			}
			if(ERROR_VALUE==ECONNRESET) 
				lprintf("%04d Connection reset by peer on send",sock);
			else if(ERROR_VALUE==ECONNABORTED)
				lprintf("%04d Connection aborted by peer on send",sock);
			else
				lprintf("%04d !ERROR %d sending",sock,ERROR_VALUE);
			return(0);
		}
		lprintf("%04d !ERROR: short send: %d instead of %d",sock,result,len);
	}
	return(len);
}

/************************************************/
/* Truncates white-space chars off end of 'str' */
/************************************************/
static void truncsp(char *str)
{
	uint c;

c=strlen(str);
while(c && (uchar)str[c-1]<=' ') c--;
str[c]=0;
}


static int nopen(char *str, int access)
{
	int file,share,count=0;

    if(access&O_DENYNONE) {
        share=SH_DENYNO;
        access&=~O_DENYNONE; }
    else if(access==O_RDONLY) share=SH_DENYWR;
    else share=SH_DENYRW;
    while(((file=sopen(str,O_BINARY|access,share))==-1)
        && errno==EACCES && count++<LOOP_NOPEN)
        if(count>10)
            mswait(55);
    return(file);
}

time_t gettimeleft(scfg_t* cfg, user_t* user, time_t starttime)
{
	time_t	now;
    long    tleft;
	time_t	timeleft;

	now=time(NULL);

	if(user->exempt&FLAG('T')) {   /* Time online exemption */
		timeleft=cfg->level_timepercall[user->level]*60;
		if(timeleft<10)             /* never get below 10 for exempt users */
			timeleft=10; }
	else {
		tleft=(((long)cfg->level_timeperday[user->level]-user->ttoday)
			+user->textra)*60L;
		if(tleft<0) tleft=0;
		if(tleft>cfg->level_timepercall[user->level]*60)
			tleft=cfg->level_timepercall[user->level]*60;
		tleft+=user->min*60L;
		tleft-=now-starttime;
		if(tleft>0x7fffL)
			timeleft=0x7fff;
		else
			timeleft=tleft; }

	return(timeleft);
}

static time_t checktime(void)
{
	struct tm tm;

    memset(&tm,0,sizeof(tm));
    tm.tm_year=94;
    tm.tm_mday=1;
    return(mktime(&tm)-0x2D24BD00L);
}

BOOL upload_stats(ulong bytes)
{
	char	str[MAX_PATH];
	int		file;
	ulong	val;

	sprintf(str,"%sdsts.dab",scfg.ctrl_dir);
	if((file=nopen(str,O_RDWR))==-1) 
		return(FALSE);

	lseek(file,20L,SEEK_SET);   /* Skip timestamp, logons and logons today */
	read(file,&val,4);        /* Uploads today         */
	val++;
	lseek(file,-4L,SEEK_CUR);
	write(file,&val,4);
	read(file,&val,4);        /* Upload bytes today    */
	val+=bytes;
	lseek(file,-4L,SEEK_CUR);
	write(file,&val,4);
	close(file);
	return(TRUE);
}

BOOL download_stats(ulong bytes)
{
	char	str[MAX_PATH];
	int		file;
	ulong	val;

	sprintf(str,"%sdsts.dab",scfg.ctrl_dir);
	if((file=nopen(str,O_RDWR))==-1) 
		return(FALSE);

	lseek(file,28L,SEEK_SET);   /* Skip timestamp, logons and logons today */
	read(file,&val,4);        /* Downloads today         */
	val++;
	lseek(file,-4L,SEEK_CUR);
	write(file,&val,4);
	read(file,&val,4);        /* Download bytes today    */
	val+=bytes;
	lseek(file,-4L,SEEK_CUR);
	write(file,&val,4);
	close(file);
	return(TRUE);
}

void recverror(SOCKET socket, int rd)
{
	if(rd==0) 
		lprintf("%04d Socket closed by peer on receive",socket);
	else if(rd==SOCKET_ERROR) {
		if(ERROR_VALUE==ECONNRESET) 
			lprintf("%04d Connection reset by peer on receive",socket);
		else if(ERROR_VALUE==ECONNABORTED) 
			lprintf("%04d Connection aborted by peer on receive",socket);
		else
			lprintf("%04d !ERROR %d receiving on socket", socket, ERROR_VALUE);
	} else
		lprintf("%04d !ERROR: recv on socket returned unexpected value: %d",socket,rd);
}

int sockreadline(SOCKET socket, char* buf, int len, time_t* lastactive)
{
	char	ch;
	int		i,rd=0;
	fd_set	socket_set;
	struct timeval	tv;
	
	while(rd<len-1) {

		tv.tv_sec=1;
		tv.tv_usec=0;

		FD_ZERO(&socket_set);
		FD_SET(socket,&socket_set);

		i=select(socket+1,&socket_set,NULL,NULL,&tv);

		if(server_socket==INVALID_SOCKET) {
			sockprintf(socket,"421 Server downed, aborting.");
			lprintf("%04d Server downed, aborting.",socket);
			return(0);
		}
		if(i<1) {
			if(i==0) {
				if((time(NULL)-(*lastactive))>startup->max_inactivity) {
					lprintf("%04d Disconnecting due to to inactivity.",socket);
					sockprintf(socket,"421 Disconnecting due to inactivity (%u seconds)."
						,startup->max_inactivity);
					return(0);
				}
				mswait(1);
				continue;
			}
			recverror(socket,i);
			return(i);
		}
		i=recv(socket, &ch, 1, 0);
		if(i<1) {
#if 0
			if(ERROR_VALUE==EWOULDBLOCK) {
				mswait(1);
				continue;
			}
#endif
			recverror(socket,i);
			return(i);
		}
		if(ch=='\n' && rd>=1) {
			break;
		}	
		buf[rd++]=ch;
	}
	buf[rd-1]=0;
	
	return(rd);
}

void DLLCALL ftp_terminate(void)
{
	if(server_socket!=INVALID_SOCKET) {
    	lprintf("%04d FTP Terminate: closing socket",server_socket);
		close_socket(&server_socket,__LINE__);
	    server_socket=INVALID_SOCKET;
    }
}


typedef struct {
	SOCKET	ctrl_sock;
	SOCKET*	data_sock;
	BOOL*	inprogress;
	BOOL*	aborted;
	BOOL	delfile;
	BOOL	tmpfile;
	BOOL	credits;
	BOOL	append;
	long	filepos;
	char	filename[MAX_PATH];
	time_t*	lastactive;
	user_t*	user;
	int		dir;
	char*	desc;
} xfer_t;

static void send_thread(void* arg)
{
	char		buf[8192];
	char		fname[MAX_PATH];
	int			i;
	int			rd;
	int			wr;
	ulong		total=0;
	ulong		dur;
	ulong		cps;
	ulong		length;
	BOOL		error=FALSE;
	FILE*		fp;
	file_t		f;
	xfer_t		xfer;
	time_t		now;
	time_t		start;
	time_t		last_report;

	xfer=*(xfer_t*)arg;

	length=flength(xfer.filename);

	if((fp=fopen(xfer.filename,"rb"))==NULL) {
		lprintf("%04d !DATA ERROR %d opening %s",xfer.ctrl_sock,errno,xfer.filename);
		sockprintf(xfer.ctrl_sock,"450 ERROR %d opening %s.",errno,xfer.filename);
		if(xfer.tmpfile && !(startup->options&FTP_OPT_KEEP_TEMP_FILES))
			remove(xfer.filename);
		close_socket(xfer.data_sock,__LINE__);
		*xfer.inprogress=FALSE;
		return;
	}
	thread_up();

	*xfer.inprogress=TRUE;
	*xfer.aborted=FALSE;
	if(startup->options&FTP_OPT_DEBUG_DATA || xfer.filepos)
		lprintf("%04d DATA socket %d sending %s from offset %ld"
			,xfer.ctrl_sock,*xfer.data_sock,xfer.filename,xfer.filepos);

	fseek(fp,xfer.filepos,SEEK_SET);
	last_report=start=time(NULL);
	while(!feof(fp)) {
		now=time(NULL);
		if(total && now>=last_report+XFER_REPORT_INTERVAL) {
			lprintf("%04d Sent %ld bytes (%ld total) of %s (%lu cps)"
				,xfer.ctrl_sock,total,length,xfer.filename
				,now-start ? total/(now-start) : total*2);
			last_report=now;
		}

		if(*xfer.aborted==TRUE) {
			lprintf("%04d !DATA Transfer aborted",xfer.ctrl_sock);
			sockprintf(xfer.ctrl_sock,"426 Transfer aborted.");
			error=TRUE;
			break;
		}
		if(server_socket==INVALID_SOCKET) {
			lprintf("%04d !DATA Transfer locally aborted",xfer.ctrl_sock);
			sockprintf(xfer.ctrl_sock,"426 Transfer locally aborted.");
			error=TRUE;
			break;
		}
		rd=fread(buf,sizeof(char),sizeof(buf),fp);
		if(rd<1) /* EOF or READ error */
			break;

		wr=send(*xfer.data_sock,buf,rd,0);
		if(wr!=rd) {
			if(wr==SOCKET_ERROR) {
				if(ERROR_VALUE==ECONNRESET) 
					lprintf("%04d DATA Connection reset by peer, sending on socket %d"
						,xfer.ctrl_sock,*xfer.data_sock);
				else if(ERROR_VALUE==ECONNABORTED) 
					lprintf("%04d DATA Connection aborted by peer, sending on socket %d"
						,xfer.ctrl_sock,*xfer.data_sock);
				else
					lprintf("%04d !DATA ERROR %d sending on data socket %d"
						,xfer.ctrl_sock,ERROR_VALUE,*xfer.data_sock);
				sockprintf(xfer.ctrl_sock,"426 Error %d sending on DATA channel",ERROR_VALUE);
				error=TRUE;
				break;
			}
			if(wr==0) {
				lprintf("%04d !DATA socket %d disconnected",xfer.ctrl_sock, *xfer.data_sock);
				sockprintf(xfer.ctrl_sock,"426 DATA channel disconnected");
				error=TRUE;
				break;
			}
			lprintf("%04d !DATA ERROR sent %d instead of %d on socket %d"
				,xfer.ctrl_sock,wr,rd,*xfer.data_sock);
			sockprintf(xfer.ctrl_sock,"451 Short DATA transfer");
			error=TRUE;
			break;
		}
		total+=wr;
		*xfer.lastactive=time(NULL);
		mswait(1);
	}

	if((i=ferror(fp))!=0) 
		lprintf("%04d !FILE ERROR %d (%d)",xfer.ctrl_sock,i,errno);

	close_socket(xfer.data_sock,__LINE__);	/* Signal end of file */
	if(startup->options&FTP_OPT_DEBUG_DATA)
		lprintf("%04d DATA socket closed",xfer.ctrl_sock);
	
	if(!error) {
		dur=time(NULL)-start;
		cps=dur ? total/dur : total*2;
		lprintf("%04d Transfer successful: %lu bytes sent in %lu seconds (%lu cps)"
			,xfer.ctrl_sock
			,total,dur,cps);
		sockprintf(xfer.ctrl_sock,"226 Download complete (%lu cps).",cps);

		if(xfer.dir>=0) {
			memset(&f,0,sizeof(f));
#ifdef _WIN32
			GetShortPathName(xfer.filename,fname,sizeof(fname));
#else
			strcpy(xfer.filename,fname);
#endif
			padfname(getfname(fname),f.name);
			strupr(f.name);
			f.dir=xfer.dir;
			f.size=total;
			if(getfileixb(&scfg,&f)==TRUE && getfiledat(&scfg,&f)==TRUE) {
				f.timesdled++;
				putfiledat(&scfg,&f);
			lprintf("%04d %s downloaded: %s (%lu times total)"
				,xfer.ctrl_sock
				,xfer.user->alias
				,xfer.filename
				,f.timesdled);
			}
			/* Need to update datedled in index */
		}	

		if(xfer.credits) {
			xfer.user->dls=(ushort)adjustuserrec(&scfg, xfer.user->number,U_DLS,5,1);
			xfer.user->dlb=adjustuserrec(&scfg, xfer.user->number,U_DLB,10,total);
			if(xfer.dir>=0 && !(scfg.dir[xfer.dir]->misc&DIR_FREE) 
				&& !(xfer.user->exempt&FLAG('D')))
				subtract_cdt(&scfg, xfer.user, xfer.credits);
		}
		if(!xfer.tmpfile && !xfer.delfile)
			download_stats(total);
	}

	fclose(fp);
	*xfer.inprogress=FALSE;
	if(xfer.tmpfile) {
		if(!(startup->options&FTP_OPT_KEEP_TEMP_FILES))
			remove(xfer.filename);
	} 
	else if(xfer.delfile && !error)
		remove(xfer.filename);

	thread_down();
}

static void receive_thread(void* arg)
{
	char		buf[8192];
	char		fname[MAX_PATH];
	int			rd;
	int			file;
	ulong		total=0;
	ulong		dur;
	ulong		cps;
	BOOL		error=FALSE;
	FILE*		fp;
	file_t		f;
	xfer_t		xfer;
	time_t		now;
	time_t		start;
	time_t		last_report;

	xfer=*(xfer_t*)arg;

	if((fp=fopen(xfer.filename,xfer.append ? "ab" : "wb"))==NULL) {
		lprintf("%04d !DATA ERROR %d opening %s",xfer.ctrl_sock,xfer.filename,errno);
		close_socket(xfer.data_sock,__LINE__);
		return;
	}

	thread_up();

	*xfer.inprogress=TRUE;
	*xfer.aborted=FALSE;
	if(xfer.filepos || startup->options&FTP_OPT_DEBUG_DATA)
		lprintf("%04d DATA socket %d receiving from offset %ld"
			,xfer.ctrl_sock,*xfer.data_sock,xfer.filepos);

	fseek(fp,xfer.filepos,SEEK_SET);
	last_report=start=time(NULL);
	while(1) {

		now=time(NULL);
		if(total && now>=last_report+XFER_REPORT_INTERVAL) {
			lprintf("%04d Received %ld bytes of %s (%lu cps)"
				,xfer.ctrl_sock,total,xfer.filename
				,now-start? total/(now-start) : total*2);
			last_report=now;
		}
		if(*xfer.aborted==TRUE) {
			lprintf("%04d !DATA Transfer aborted",xfer.ctrl_sock);
			/* Send NAK */
			sockprintf(xfer.ctrl_sock,"426 Transfer aborted.");
			error=TRUE;
			break;
		}
		if(server_socket==INVALID_SOCKET) {
			lprintf("%04d !DATA Transfer locally aborted",xfer.ctrl_sock);
			/* Send NAK */
			sockprintf(xfer.ctrl_sock,"426 Transfer locally aborted.");
			error=TRUE;
			break;
		}
		rd=recv(*xfer.data_sock,buf,sizeof(buf),0);
		if(rd<1) {
			if(rd==0) { /* Socket closed */
				if(startup->options&FTP_OPT_DEBUG_DATA)
					lprintf("%04d DATA socket %d closed by client"
						,xfer.ctrl_sock,*xfer.data_sock);
				break;
			}
			if(rd==SOCKET_ERROR) {
				if(ERROR_VALUE==ECONNRESET) 
					lprintf("%04d Connection reset by peer, receiving on socket %d"
						,xfer.ctrl_sock,*xfer.data_sock);
				else if(ERROR_VALUE==ECONNABORTED) 
					lprintf("%04d Connection aborted by peer, receiving on socket %d"
						,xfer.ctrl_sock,*xfer.data_sock);
				else
					lprintf("%04d !DATA ERROR %d receiving on data socket %d"
						,xfer.ctrl_sock,ERROR_VALUE,*xfer.data_sock);
				/* Send NAK */
				sockprintf(xfer.ctrl_sock,"426 Error %d receiving on DATA channel"
					,ERROR_VALUE);
				error=TRUE;
				break;
			}
			lprintf("%04d !DATA ERROR recv returned %d on socket %d"
				,xfer.ctrl_sock,rd,*xfer.data_sock);
			/* Send NAK */
			sockprintf(xfer.ctrl_sock,"451 Unexpected socket error: %d",rd);
			error=TRUE;
			break;
		}
		fwrite(buf,1,rd,fp);
		total+=rd;
		*xfer.lastactive=time(NULL);
		mswait(1);
	}

	*xfer.inprogress=FALSE;
	fclose(fp);

	close_socket(xfer.data_sock,__LINE__);
	if(error && startup->options&FTP_OPT_DEBUG_DATA)
		lprintf("%04d DATA socket %d closed",xfer.ctrl_sock,*xfer.data_sock);
	
	if(!error) {
		dur=time(NULL)-start;
		cps=dur ? total/dur : total*2;
		lprintf("%04d Transfer successful: %lu bytes received in %lu seconds (%lu cps)"
			,xfer.ctrl_sock
			,total,dur,cps);

		if(xfer.dir>=0) {
			memset(&f,0,sizeof(f));
#ifdef _WIN32
			GetShortPathName(xfer.filename,fname,sizeof(fname));
#else
			strcpy(fname,xfer.filename);
#endif
			padfname(getfname(fname),f.name);
			strupr(f.name);
			f.dir=xfer.dir;
			if(scfg.dir[f.dir]->misc&DIR_AONLY)  /* Forced anonymous */
				f.misc|=FM_ANON;
			f.cdt=total;
			f.dateuled=time(NULL);
			f.timesdled=0;
			f.datedled=0L;
			f.opencount=0;
			if(xfer.desc==NULL || *xfer.desc==0) {
				sprintf(f.desc,"%.*s",(int)sizeof(f.desc)-1,getfname(xfer.filename));
/* old way		strcpy(f.desc,"Received via FTP: No description given"); */
			} else
				sprintf(f.desc,"%.*s",(int)sizeof(f.desc)-1,xfer.desc);
			strcpy(f.uler,xfer.user->alias);
			if(!addfiledat(&scfg,&f))
				lprintf("%04d !ERROR adding file (%s) to database",xfer.ctrl_sock,f.name);
			if(scfg.dir[f.dir]->upload_sem[0])
				if((file=sopen(scfg.dir[f.dir]->upload_sem,O_WRONLY|O_CREAT|O_TRUNC,SH_DENYNO))!=-1)
					close(file);
			/**************************/
			/* Update Uploader's Info */
			/**************************/
			xfer.user->uls=(short)adjustuserrec(&scfg, xfer.user->number,U_ULS,5,1);
			xfer.user->ulb=adjustuserrec(&scfg, xfer.user->number,U_ULB,10,total);
			if(scfg.dir[f.dir]->up_pct && scfg.dir[f.dir]->misc&DIR_CDTUL) { /* credit for upload */
				if(scfg.dir[f.dir]->misc&DIR_CDTMIN && cps)    /* Give min instead of cdt */
					xfer.user->min=adjustuserrec(&scfg,xfer.user->number,U_MIN,10
						,((ulong)(total*(scfg.dir[f.dir]->up_pct/100.0))/cps)/60);
				else
					xfer.user->cdt=adjustuserrec(&scfg,xfer.user->number,U_CDT,10
						,(ulong)(f.cdt*(scfg.dir[f.dir]->up_pct/100.0))); 
			}
			upload_stats(total);
		}
		/* Send ACK */
		sockprintf(xfer.ctrl_sock,"226 Upload complete (%lu cps).",cps);
	}

	thread_down();
}



static void filexfer(SOCKADDR_IN* addr, SOCKET ctrl_sock, SOCKET pasv_sock, SOCKET* data_sock
					,char* filename, long filepos, BOOL* inprogress, BOOL* aborted
					,BOOL delfile, BOOL tmpfile
					,time_t* lastactive
					,user_t* user
					,int dir
					,BOOL receiving
					,BOOL credits
					,BOOL append
					,char* desc)
{
	int			result;
	int			addr_len;
	SOCKADDR_IN	server_addr;
	static xfer_t xfer;

	if((*inprogress)==TRUE) {
		lprintf("%04d !TRANSFER already in progress",ctrl_sock);
		sockprintf(ctrl_sock,"425 Transfer already in progress.");
		return;
	}
	*inprogress=TRUE;

	if(*data_sock!=INVALID_SOCKET)
		close_socket(data_sock,__LINE__);

	if(pasv_sock==INVALID_SOCKET) {	/* !PASV */

		if((*data_sock=socket(AF_INET, SOCK_STREAM, IPPROTO_IP)) == INVALID_SOCKET) {
			lprintf("%04d !DATA ERROR %d opening socket", ctrl_sock, ERROR_VALUE);
			sockprintf(ctrl_sock,"425 Error %d opening socket",ERROR_VALUE);
			if(tmpfile)
				remove(filename);
			*inprogress=FALSE;
			return;
		}
		if(startup->socket_open!=NULL)
			startup->socket_open(TRUE);
		sockets++;
		if(startup->options&FTP_OPT_DEBUG_DATA)
			lprintf("%04d DATA socket %d opened",ctrl_sock,*data_sock);

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

		server_addr.sin_addr.s_addr = htonl(startup->interface_addr);
		server_addr.sin_family = AF_INET;
		server_addr.sin_port   = htons(0);

		if((result=bind(*data_sock, (struct sockaddr *) &server_addr
			,sizeof(server_addr)))!=0) {
			lprintf ("%04d !DATA ERROR %d (%d) binding socket %d"
				,ctrl_sock, result, ERROR_VALUE, *data_sock);
			sockprintf(ctrl_sock,"425 Error %d binding socket",ERROR_VALUE);
			if(tmpfile)
				remove(filename);
			*inprogress=FALSE;
			close_socket(data_sock,__LINE__);
			return;
		}

		if((result=connect(*data_sock, (struct sockaddr *)addr
			,sizeof(struct sockaddr)))!=0) {
			lprintf("%04d !DATA ERROR %d (%d) connecting to client %s port %d on socket %d"
					,ctrl_sock,result,ERROR_VALUE
					,inet_ntoa(addr->sin_addr),ntohs(addr->sin_port),*data_sock);
			sockprintf(ctrl_sock,"425 Error %d connecting to socket",ERROR_VALUE);
			if(tmpfile)
				remove(filename);
			*inprogress=FALSE;
			close_socket(data_sock,__LINE__);
			return;
		}
		if(startup->options&FTP_OPT_DEBUG_DATA)
			lprintf("%04d DATA socket %d connected to %s port %d"
				,ctrl_sock,*data_sock,inet_ntoa(addr->sin_addr),ntohs(addr->sin_port));

	} else {	/* PASV */
		addr_len=sizeof(SOCKADDR_IN);
		if((*data_sock=accept(pasv_sock,(struct sockaddr*)addr,&addr_len))==INVALID_SOCKET) {
			lprintf("%04d !PASV DATA ERROR %d accepting connection on socket %d"
				,ctrl_sock,ERROR_VALUE,pasv_sock);
			sockprintf(ctrl_sock,"425 Error %d accepting connection",ERROR_VALUE);
			if(tmpfile)
				remove(filename);
			*inprogress=FALSE;
			return;
		}
		if(startup->socket_open!=NULL)
			startup->socket_open(TRUE);
		sockets++;
		if(startup->options&FTP_OPT_DEBUG_DATA)
			lprintf("%04d PASV DATA socket %d connected to %s port %d"
				,ctrl_sock,*data_sock,inet_ntoa(addr->sin_addr),ntohs(addr->sin_port));
	}


	/* Get Mutex here? */
	memset(&xfer,0,sizeof(xfer));
	xfer.ctrl_sock=ctrl_sock;
	xfer.data_sock=data_sock;
	xfer.inprogress=inprogress;
	xfer.aborted=aborted;
	xfer.delfile=delfile;
	xfer.tmpfile=tmpfile;
	xfer.append=append;
	xfer.filepos=filepos;
	xfer.credits=credits;
	xfer.lastactive=lastactive;
	xfer.user=user;
	xfer.dir=dir;
	xfer.desc=desc;
	sprintf(xfer.filename,"%.*s",(int)sizeof(xfer.filename)-1,filename);
	if(receiving)
		_beginthread(receive_thread,0,(void*)&xfer);
	else
		_beginthread(send_thread,0,(void*)&xfer);
}

/* convert "user name" to "user.name" or "mr. user" to "mr._user" */
char* dotname(char* in, char* out)
{
	char	ch;
	int		i;

	if(strchr(in,'.')==NULL)
		ch='.';
	else
		ch='_';
	for(i=0;in[i];i++)
		if(in[i]<=' ')
			out[i]=ch;
		else
			out[i]=in[i];
	out[i]=0;
	return(out);
}

/* Returns the directory index of a virtual lib/dir path (e.g. main/games/filename) */
int getdir(char* p, user_t* user)
{
	char*	tp;
	char	path[MAX_PATH];
	int		dir;
	int		lib;

	sprintf(path,"%.*s",(int)sizeof(path)-1,p);
	p=path;

	if(*p=='/') 
		p++;
	else if(!strncmp(p,"./",2))
		p+=2;

	tp=strchr(p,'/');
	if(tp) *tp=0;
	for(lib=0;lib<scfg.total_libs;lib++) {
		if(!chk_ar(&scfg,scfg.lib[lib]->ar,user))
			continue;
		if(!stricmp(scfg.lib[lib]->sname,p))
			break;
	}
	if(lib>=scfg.total_libs) 
		return(-1);

	if(tp!=NULL)
		p=tp+1;

	tp=strchr(p,'/');
	if(tp) *tp=0;
	for(dir=0;dir<scfg.total_dirs;dir++) {
		if(scfg.dir[dir]->lib!=lib)
			continue;
		if(dir!=scfg.sysop_dir && dir!=scfg.upload_dir 
			&& !chk_ar(&scfg,scfg.dir[dir]->ar,user))
			continue;
		if(!stricmp(scfg.dir[dir]->code,p))