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ftp.cpp
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ftp.cpp
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/***************************************************************
BayCom(R) Packet-Radio fuer IBM PC
OpenBCM-Mailbox
------------------
FTP-Server for BCM See RFC959
------------------
Copyright (C) Jens Schoon, DH6BB
Alle Rechte vorbehalten / All Rights reserved
// 20040000 DH6BB Implementierung des FTP-Servers in die OBCM
// 20040205 DH6BB Implementierung NLST
// 20040205 DH6BB Implementierung CDUP
// 20040205 DH6BB Rewrite PORT
// 20040207 DH6BB Check ob Path erreichbar/gueltig
// 20040207 DH6BB Implementierung STOR
// 20040208 DH6BB Check wo geschrieben werden darf
// 20040514 DH6BB Wiederaufnahme abgebrochener Downloads mit "REST" moeglich
***************************************************************/
#include "baycom.h"
#ifdef __UNIX__
#include <grp.h>
#include <pwd.h>
#endif
#define FTPSIGSTR "OBCMFTPD"
//seperator for paths
#define _SEP '/'
#define _SEPS "/"
#define _DSEP '//'
#define _DSEPS "//"
#ifndef __UNIX__
#define DRIVE_LETTERS
#endif
static char *Monat[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
class ftpd
{
public:
ftpd (void);
~ftpd (void);
void start_ftp (char *name);
private:
void permissions (unsigned long);
void processpath (char *);
void get_intropath (char *);
char signature[sizeof(FTPSIGSTR)];
char *extract_argument (void);
bool chpath (char *, char *);
bool loggedin (void);
bool pathallowed (char *path);
FILE *f;
DIR *dir;
char *tmp;
char *args;
char tmp2[256];
char group[30];
char user[15];
char pass[34];
char fspath[FSPATHLEN+1];
char fullpath[FSPATHLEN+1];
char intropath[FSPATHLEN+1];
char permission[11];
bool finish;
struct stat statbuf;
};
/*---------------------------------------------------------------------------*/
ftpd::ftpd (void)
//*************************************************************************
//
// Initialization
//
//*************************************************************************
{
strcpy(signature, FTPSIGSTR);
}
/*---------------------------------------------------------------------------*/
ftpd::~ftpd (void)
//*************************************************************************
//
// Deinitialization
//
//*************************************************************************
{
if (strcmp(signature, FTPSIGSTR))
trace(fatal, "ftpd", "sig broken");
}
/*---------------------------------------------------------------------------*/
void ftpd::start_ftp (char *name)
//*************************************************************************
//
// Startet den FTP-Server und arbeitet die Befehle ab
//
//*************************************************************************
{
lastfunc("start ftp");
static char *Type[]=
{
"UNKNOWN", "ASCII", "BINARY"
};
static char *beftab[] =
{
"BYE",
"CDUP", "CWD",
"DIR",
"EXIT", "EPSV",
"FEAT",
"HELP",
"LIST",
"MDTM",
"NLST", "NOOP",
"PASS", "PASV", "PORT", "PWD",
"QUIT",
"REST", "RETR",
"SIZE", "STOR", "SYST",
"TYPE",
"USER",
NULL
};
enum befnum
{
_ERR,
_BYE,
_CDUP, _CWD,
_DIR,
_EXIT, _EPSV,
_FEAT,
_HELP,
_LIST,
_MDTM,
_NLST, _NOOP,
_PASS, _PASV, _PORT, _PWD,
_QUIT,
_REST, _RETR,
_SIZE, _STOR, _SYST,
_TYPE,
_USER
};
struct stat st;
struct tm *ptm;
#ifdef __LINUX__
struct dirent **namelist;
#else
struct dirent *di;
#endif
int filecount = 0;
int old_sock;
int c;
int i = 0;
int error = 0;
int Typ = 0;
unsigned ip[5];
unsigned ipport[3];
unsigned long int filesize = 0;
unsigned long int rest = 0;
char tempallowed[FSPATHLEN+1];
char mdtmstr[80];
char port[16];
char test[256];
bool nlist = false; // NLST-Commando oder LIST-Commando
FILE *datei;
b->ftp = 1;
b->charset = 1; //get_ttycharset..
finish = false;
*group = 0;
*user = 0;
if (myhostname(b->line, BUFLEN - 1) == -1) return;
putf("220 %s FTP-Server OpenBCM V" VNUMMER "\n", b->line);
while (! runterfahren)
{
getline(b->line, BUFLEN - 1, 1);
if ((m.tcpiptrace == 5) || (m.tcpiptrace == 8))
{
if (! strstr(b->line, "PASS"))
ftplog("RX", b->line);
else
ftplog("RX", "PASS (hidden)");
}
args = b->line;
switch ((befnum) readcmd(beftab, &args, 0))
{
case _USER:
if (! (tmp = extract_argument()))
{
putf("500 '%s': command not understood.\n", b->line);
finish = true;
break;
}
strcpy(user, tmp);
if (! strcasecmp(user, "anonymous") ||
! strcasecmp(user, "ftp") ||
! strcasecmp(user, "guest") ||
! strcasecmp(user, "gast"))
{
#ifdef _GUEST
putf("331 Guest login ok. Type your mail-address as password.\n");
strcpy(user, "guest");
#else
putf("500 No guest login. Sri\n");
return;
#endif
}
else
{
putf("331 Password required for %s.\n", user);
}
break;
case _PASS:
if (! user)
{
putf("503 Login with USER first.\n");
break;
}
if (strcasecmp(user, "guest")) // kein Gast
{
if (! (tmp = extract_argument()))
{
putf("500 '%s': command not understood.\n", b->line);
finish = true;
break;
}
strcpy(pass, tmp);
if (mbcallok(user))
{
if (isamprnet(b->peerip) > 0) get_httppw(user, b->line);
else get_ttypw(user, b->line);
}
else *b->line = 0;
if (! *b->line || strcasecmp(b->line, pass))
{
pwlog(b->peerip, b->uplink, "bad pw");
putf("530 Login incorrect.\n");
finish = true;
break;
}
}
/*
else // Guest
{
if (! strstr(pass, "@")) // ein @ sollte in einer Mailadresse sein
{
putf("530 Login incorrect. No valid mail-address\n");
break;
}
}
*/
b->pwok = OK;
mblogin(user, login_silent, "FTP");
putf("230- OpenBCM FTP-Server\n");
readtext("ftpintro"); // -> msg/ftpintro.dl
if (m.disable)
{
putf("230- Service not available due to maintenance!\n");
putf("221 OpenBCM FTP-Server signing off. Goodbye.\n");
finish = true;
break;
}
if (*m.fspath == 'O' && *m.fspath == 'o')
{
putf("230- Service not available!\n");
putf("221 OpenBCM FTP-Server signing off. Goodbye.\n");
finish = true;
break;
}
putf("230 User %s logged in.\n", user);
// Hier suchen wir den Path zum filesurf
strcpy(tempallowed, m.fspath);
strcat(tempallowed, " ");
*strstr(tempallowed, " ") = 0;
if (*tempallowed == '+') strcpy(tempallowed, tempallowed + 1);
strcpy(fspath, tempallowed);
get_intropath(fspath);
strcpy(fspath, _SEPS);
break;
case _BYE:
case _QUIT:
finish = true;
wdelay(200);
putf("221 OpenBCM FTP-Server signing off. Goodbye.\n");
break;
case _HELP:
if (! loggedin()) break;
putf("HELP\n");
putf(".\n");
break;
case _CDUP: // Change Working Directory 1 up
if (! loggedin()) break;
chpath(fspath, "..");
putf("250 CWD Command successful.\n");
break;
case _CWD: // Change Working Directory
if (! loggedin()) break;
if (! (tmp = extract_argument()))
{
putf("500 Unknown command.\n");
break;
}
if (chpath(fspath, tmp))
{
putf("250 CWD Command successful.\n");
}
else
putf("550 %s: No such file or directory.\n", tmp);
break;
case _MDTM:
if (! loggedin()) break;
if (! (tmp = extract_argument()))
{
putf("500 Unknown command.\n");
break;
}
if (stat(tmp, &statbuf))
{
ptm = gmtime(&statbuf.st_mtime);
sprintf(mdtmstr, "%04d%02d%02d%02d%02d%02d",
ptm->tm_year+1900, ptm->tm_mon+1, ptm->tm_mday,
ptm->tm_hour, ptm->tm_min, ptm->tm_sec);
putf("213 %s\n", mdtmstr);
}
else
{
putf("550 %s: No such file or directory.\n", tmp);
}
break;
case _SIZE: // Size of File
if (! loggedin()) break;
if (! (tmp = extract_argument()))
{
putf("500 Unknown command.\n");
break;
}
if (tmp[0] != _SEP)
sprintf(test, "%s%s", fullpath, tmp);
else
sprintf(test, "%s%s", intropath, tmp);
if (! (error = stat(test, &st)))
{
putf("213 %ld\n", st.st_size);
}
else
{
putf("550 %s: error stat file.\n");
}
break;
case _SYST: // System Type
if (! loggedin()) break;
#ifdef __UNIX__
putf("215 UNIX Type: L8\n");
#else
putf("215 Windows_NT\n");
#endif
break;
case _TYPE:
if (! loggedin()) break;
if (! (tmp = extract_argument()))
{
putf("500 '%s' command not understood.\n", args);
}
else
{
if (! strcmp(args, "A"))
{
putf("200 Type set to A.\n");
Typ = 1;
}
else if (! strcmp(args, "I"))
{
putf("200 Type set to I.\n");
Typ = 2;
}
else putf("501 Unknown Type '%s'.\n", args);
}
break;
case _PASV: // PASV
if (! loggedin()) break;
/*
ipport[0] = random_max(20);
ipport[1] = random_max(20);
putf("227 Entering Passive Mode (%d,%d,%d,%d,%d,%d)",
ip[0], ip[1], ip[2], ip[3], ipport[0], ipport[1]);
*/
//ToDo:
//Sollte man sicherlich noch einbauen
putf("500 PASV Unknown command.\n");
break;
case _EPSV: // EPSV
if (! loggedin()) break;
//ToDo:
//Kann man sicherlich noch einbauen
putf("500 EPSV not understood.\n");
break;
case _FEAT: // FEAT
if (! loggedin()) break;
putf("500 FEAT is not supported by the remote server.\n");
//ToDo:
//Kann man sicherlich noch einbauen
break;
case _NOOP: // Noop
if (! loggedin()) break;
putf("200 NOOP command successful.\n");
break;
case _PORT: // Port
if (! loggedin()) break;
if (*args)
{
int nummer = 0;
int a = 0;
safe_strcpy(tmp2, args);
for (i=0; i<4; i++)
{
while (tmp2[a] != ',')
{
nummer *= 10;
nummer += tmp2[a] - 48;
a++;
}
ip[i] = nummer;
nummer = 0;
a++;
}
for (i=0; i<2; i++)
{
while (tmp2[a] != ',' && isdigit(tmp2[a]))
{
nummer *= 10;
nummer += tmp2[a] - 48;
a++;
}
ipport[i]=nummer;
nummer=0;
a++;
}
sprintf(port, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
putf("200 PORT command successful.\n");
}
else
putf("500 Unknown command.\n");
break;
case _PWD:
if (! loggedin()) break;
putf("257 \"%s\" is the current directory.\n", fspath);
break;
case _RETR:
if (! loggedin()) break;
if (! (tmp = extract_argument()))
{
putf("500 %s Unknown command.\n", tmp);
break;
}
if (! port)
{
putf("500 No data port.\n"); // Meldung OK?
break;
}
if (tmp[0] != _SEP)
sprintf(test, "%s%s", fullpath, tmp);
else
sprintf(test, "%s%s", intropath, tmp);
if (! (datei = s_fopen(test, "lrb")))
{
putf("550 %s: No such file or directory.\n", tmp);
}
else
{
stat(test, &st);
putf("150 Opening %s mode data connection for '%s' (%ld bytes).\n",
Type[Typ], tmp, st.st_size);
putflush_sock(); // alten puffer leeren
old_sock = t->socket; // alten socket retten
// Daten werden auf einem anderen Port uebertragen
sprintf(port, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
if (! ftp_connect(port, ipport[0]*256+ipport[1]))
{
trace(report, "ftpd", "ftp_connect failed %s", port);
*b->logincall = 0;
// putflush_sock(); // puffer leeren
// disconnect_sock(); // Daten socket schliessen
t->socket = old_sock; // Zum Glueck haben wir unseren alten Socket noch
putf("500 Can't connect data port.\n");
break;
}
filesize=0;
t->processkind &= ~P_TELNET;
while ((c = fgetc(datei)) != EOF)
{
if (filesize >= rest) bputv(c);
filesize++;
}
t->processkind |= P_TELNET;
#ifdef DEBUG_FTP
trace(report, "ftpd", "Submit-Size: %d", filesize);
#endif
s_fclose(datei);
rest = 0;
putflush_sock(); // puffer leeren
disconnect_sock(); // Daten socket schliessen
t->socket = old_sock; // Zum Glueck haben wir unseren alten Socket noch
putf("226 Transfer complete.\n");
}
break;
case _REST: // Wiederaufnahme abgebrochener Downloads
if (! loggedin()) break;
if (! (tmp = extract_argument()))
{
putf("500 %s Unknown command.\n", tmp);
break;
}
rest=atoi(tmp);
putf("350 Restarting at %d. Send STORE or RETRIEVE to initiate transfer.\n", rest);
break;
case _STOR:
if (! loggedin()) break;
if (! strcasecmp(user, "guest"))
{ // Wenn GUEST, dann schreiben verboten!
putf("553 Permission denied.\n");
break;
}
if (! (tmp = extract_argument()))
{
putf("500 %s Unknown command.\n", tmp);
break;
}
if (! port)
{
putf("500 No data port.\n");
break;
}
if (tmp[0] != _SEP)
sprintf(test, "%s%s", fullpath, tmp);
else
sprintf(test, "%s%s", intropath, tmp);
// Checken ob wir hier ueberhaupt schreiben duerfen!
if (! pathallowed(test))
{
putf("553 Permission denied.\n");
break;
}
if ((datei = s_fopen(test, "sr+t")) != NULL)
{
// Entgegen der FTP-Spec ueberschreiben wir keine Dateien!
// Es sei denn, es wurde ein "Rest" angegeben.
s_fclose(datei);
if (rest == 0)
{
putf("550 File exists (%s)\n", tmp); // ToDo: Meldung checken
break;
}
}
if (! (datei=s_fopen(test, "sa+b")))
{
putf("550 Cannot open file (%s)\n", tmp); // ToDo: Meldung checken
break;
// 550 '%s': Permission denied
}
else
{
putf("150 Opening %s mode data connection for '%s'.\n", Type[Typ], tmp);
// Daten werden auf einem anderen Port uebertragen
sprintf(port, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
putflush_sock(); // alten puffer leeren
old_sock = t->socket; // alten socket retten
if (! ftp_connect(port, ipport[0]*256+ipport[1]))
{
trace(report, "ftpd", "ftp_connect failed %s", port);
*b->logincall = 0;
// putflush_sock(); // puffer leeren
// disconnect_sock(); // Daten socket schliessen
t->socket = old_sock; // Zum Glueck haben wir unseren alten Socket noch
putf("500 Can't connect data port.\n");
break;
}
while ((c = getv_sock_ftp()) != 256)
{
fputc(c, datei);
filesize++;
}
s_fclose(datei);
putflush_sock(); // puffer leeren
disconnect_sock(); // Daten socket schliessen
t->socket = old_sock; // Zum Glueck haben wir unseren alten Socket noch
putf("226 Transfer complete.\n");
}
break;
case _NLST:
nlist = true; // Nur Dateinamen. kein break!
case _LIST: // List (DIR)
if (! loggedin()) break;
putf("150 Opening %s mode data connection for file list.\n", Type[Typ]);
if (! port)
{
putf("500 No data port.\n");
break;
}
filecount = 0;
putflush_sock(); // alten puffer leeren
old_sock = t->socket; // alten socket retten
// Daten werden auf einem anderen Port uebertragen
#ifdef __UNIX__
filecount = scandir(fullpath, &namelist, 0, alphasort);
#else
dir = opendir(fullpath);
while (dir && (di = readdir(dir)) != NULL)
filecount++;
if (dir) closedir(dir);
#endif
if (filecount < 0)
{
#ifdef DEBUG_FTP
trace(report, "ftpd", "Filecount error: %d", filecount);
#endif
putf("550 No files found. Please inform the sysop.\n");
nlist = false;
break;
}
else
{
if (! port)
{
putf("500 No data port.\n");
break;
}
if (! ftp_connect(port, ipport[0]*256+ipport[1]))
{
trace(report, "ftpd", "ftp_connect failed %s", port);
*b->logincall = 0;
// putflush_sock(); // puffer leeren
// disconnect_sock(); // Daten socket schliessen
t->socket = old_sock; // Zum Glueck haben wir unseren alten Socket noch
putf("500 Can't connect data port.\n");
break;
}
#ifdef __UNIX__
while (i < filecount)
{
if (nlist) //nur Dateinamen
putf("%s\n", namelist[i]->d_name);
else
{
sprintf(test, "%s%s", fullpath, namelist[i]->d_name);
error = stat(test, &st);
if (! error)
{
permissions(st.st_mode);
putf("%s %4u %-8s %-8s ", permission, st.st_nlink,
getpwuid(st.st_uid)->pw_name,
getgrgid(st.st_gid)->gr_name);
putf("%8ld ", st.st_size);
ptm = gmtime(&st.st_mtime);
if (difftime(time(0), st.st_mtime)>365*24*60*60)
putf("%03s %02d %04d ", Monat[ptm->tm_mon],
ptm->tm_mday, ptm->tm_year+1900);
else
putf("%03s %02d %02d:%02d ", Monat[ptm->tm_mon],
ptm->tm_mday, ptm->tm_hour,
ptm->tm_min);
putf("%s\n", namelist[i]->d_name);
}
else
{
#ifdef DEBUG_FTP
trace(report, "ftpd", "%s %s", namelist[i]->d_name,
strerror(errno));
#endif
}
}
free(namelist[i]);
i++;
}
}
#else
dir = opendir(fullpath);
while (dir && (di = readdir(dir)) != NULL)
{
if (nlist) //nur Dateinamen
putf("%s\n", di->d_name);
else
{
sprintf(test, "%s%s", fullpath, di->d_name);
error = stat(test, &st);
if (! error)
{
permissions(st.st_mode);
putf("%s %4u %-8s %-8s ", permission,
st.st_nlink, "user", "group");
putf("%8ld ", st.st_size);
ptm = gmtime(&st.st_mtime);
if (difftime(time(0), st.st_mtime)>31536000) //365*24*60*60
putf("%03s %02d %04d ", Monat[ptm->tm_mon],
ptm->tm_mday, ptm->tm_year+1900);
else
putf("%03s %02d %02d:%02d ", Monat[ptm->tm_mon],
ptm->tm_mday, ptm->tm_hour,
ptm->tm_min);
putf("%s\n", di->d_name);
}
else
{
#ifdef DEBUG_FTP
trace(report, "ftpd", "%s %s", di->d_name, strerror(errno));
#endif
}
}
}
}
if (dir) closedir(dir);
#endif
putflush_sock(); // puffer leeren
disconnect_sock(); // Daten socket schliessen
t->socket = old_sock; // Zum Glueck haben wir unseren alten Socket noch
if (filecount == 0)
putf("550 No files found.\n");
else
putf("226 Transfer complete.\n");
nlist = false;
break;
default:
putf("500 Unknown command.\n");
}
if (finish) break;
}
}
/*---------------------------------------------------------------------------*/
bool ftpd::loggedin (void)
//*************************************************************************
//
// Fragt ab, ob wir schon eingelogged sind.
// TRUE = eingelogged mit Username und Passwort (auch anonymous)
// FALSE = nicht eingelogged
//
//*************************************************************************
{
lastfunc("loggedin");
if (! user || ! b->pwok)
{
putf("503 Login with USER and PASS first\n");
return false;
}
else
return true;
}
/*---------------------------------------------------------------------------*/
void mblogin_ftp (char *name)
//*************************************************************************
//
// Haupt-Login
//
//*************************************************************************
{
lastfunc("mblogin_ftp");
ftpd ft;
strcpy(b->uplink, "FTP");
strcpy(b->peerip, name);
*b->logincall = 0;
ft.start_ftp(name);
putflush_sock();
disconnect_sock();
}
/*---------------------------------------------------------------------------*/
char *ftpd::extract_argument ()
//*************************************************************************
//
// Gibt nur die Argumente nach dem Befehl zurueck.
// Achtung! "," gilt als Trennzeichen....
//
//*************************************************************************
{
lastfunc("extract_argument");
skip(args);
if (*args)
return args;
else
return NULL;
}
/*---------------------------------------------------------------------------*/
bool ftpd::chpath (char *path, char *add_path)
//*************************************************************************
//
// Fuegt den zweiten angegebenen Pfad an den ersten Pfad an bzw. ersetzt
// den ersten Pfad durch den zweiten, wenn dieser mit einem Slash beginnt
// Rueckgabewert TRUE wenn Verzeichnis gueltig, sonst FALSE
// geklaut aus "filesurf"
//
//*************************************************************************
{
lastfunc("chpath");
char tmppath[FSPATHLEN+FNAMELEN+2];
char stat_path[FSPATHLEN+FNAMELEN+2];
bool gueltig = false;
strcpy(tmppath, path); // alten Path sichern
if (*add_path == _SEP)
strcpy(tmppath, add_path);
else
strcat(tmppath, add_path);
processpath(tmppath);
sprintf(stat_path, "%s%s", intropath, tmppath);
processpath(stat_path);
if ((dir = opendir(stat_path)) != NULL)
{
closedir(dir);
strcpy(path, tmppath);
gueltig = true;
}
else
gueltig = false;
sprintf(fullpath, "%s%s", intropath, path);
processpath(fullpath);
return gueltig;
}
/*---------------------------------------------------------------------------*/
void ftpd::processpath (char *path)
//*************************************************************************
//
// - Replaces two or more slashes in a row by a single slash
// - Replaces "/./" by "/"
// - Removes "/../" and the preceding part of the path
// - Puts a slash at the end, if there isn't one
//
//*************************************************************************
{
lastfunc("processpath");
char *pointer, *pointer2;
strcat(path, _SEPS);
while ((pointer = strstr(path, _SEPS""_SEPS)) != NULL)
memmove(pointer, pointer + 1, strlen(pointer + 1) + 1);
while ((pointer = strstr(path, _SEPS"."_SEPS)) != NULL)
memmove(pointer, pointer + 2, strlen(pointer + 2) + 1);
while ((pointer = strstr(path, _SEPS".."_SEPS)) != NULL)
{
memmove(pointer, pointer + 3, strlen(pointer + 3) + 1);
if (pointer == path) break;
pointer2 = pointer;
do pointer--; while (*pointer != _SEP);
memmove(pointer, pointer2, strlen(pointer2) + 1);
}
}
/*---------------------------------------------------------------------------*/
void ftpd::get_intropath (char *path)
//*************************************************************************
//
// - Replaces two or more slashes in a row by a single slash
// - Replaces "/./" by "/"
// - Removes "/../" and the preceding part of the path
// - Puts a slash at the end, if there isn't one
//
//*************************************************************************
{
#ifndef __UNIX__
#undef _SEP
#undef _SEPS
#define _SEP '\\'
#define _SEPS "\\"
#endif
lastfunc("intropath");
char *pointer, *pointer2;
strcat(path, _SEPS);
while ((pointer = strstr(path, _SEPS""_SEPS)) != NULL)
memmove(pointer, pointer + 1, strlen(pointer + 1) + 1);
while ((pointer = strstr(path, _SEPS"."_SEPS)) != NULL)
memmove(pointer, pointer + 2, strlen(pointer + 2) + 1);
#ifndef __UNIX__
while ((pointer = strstr(path, _SEPS)) != NULL)
memmove(pointer, "//", strlen("//") + 1);
#endif
while ((pointer = strstr(path, _SEPS".."_SEPS)) != NULL)
{
memmove(pointer, pointer + 3, strlen(pointer + 3) + 1);
if (pointer == path) break;
pointer2 = pointer;
do pointer--; while (*pointer != _SEP);
memmove(pointer, pointer2, strlen(pointer2) + 1);
}
safe_strcpy(fullpath, path);
safe_strcpy(intropath, fullpath);
#ifndef __UNIX__
#undef _SEP
#undef _SEPS
#define _SEP '/'
#define _SEPS "/"
#endif
}
/*---------------------------------------------------------------------------*/
void ftpd::permissions (unsigned long perm)
//*************************************************************************
//
// Get File-Permission and returns a String like "drwxrw-rw-"
//
//*************************************************************************
{
lastfunc("permissions");
strcpy(permission, "----------");
#ifndef __UNIX__
#define S_IFSOCK 0140000
#define S_IFLNK 0120000
#define S_IFBLK 0060000
#define S_IFIFO 0010000
#define S_ISUID 0004000
#define S_ISGID 0002000
#define S_ISVTX 0001000
#define S_IRWXU 00700
#define S_IRUSR 00400
#define S_IWUSR 00200
#define S_IXUSR 00100
#define S_IRWXG 00070
#define S_IRGRP 00040
#define S_IWGRP 00020
#define S_IXGRP 00010
#define S_IRWXO 00007
#define S_IROTH 00004
#define S_IWOTH 00002
#define S_IXOTH 00001
#endif
if ((perm & S_IFMT) == S_IFSOCK) permission[0]='s';
else if ((perm & S_IFMT) == S_IFLNK) permission[0]='l';
else if ((perm & S_IFMT) == S_IFREG) permission[0]='-';
else if ((perm & S_IFMT) == S_IFBLK) permission[0]='b';
else if ((perm & S_IFMT) == S_IFBLK) permission[0]='b';
else if ((perm & S_IFMT) == S_IFDIR) permission[0]='d';
else if ((perm & S_IFMT) == S_IFCHR) permission[0]='c';
else if ((perm & S_IFMT) == S_IFIFO) permission[0]='p';
else permission[0]='?';
if (perm & S_IRUSR) permission[1]='r';
if (perm & S_IWUSR) permission[2]='w';
if (perm & S_IXUSR)
if (perm & S_ISUID) permission[3]='s';
else permission[3]='x';
else
if (perm & S_ISUID) permission[3]='S';
else permission[3]='-';
if (perm & S_IRGRP) permission[4]='r';
if (perm & S_IWGRP) permission[5]='w';
if (perm & S_IXGRP)
if (perm & S_ISGID) permission[6]='s';
else permission[6]='x';
else
if (perm & S_ISGID) permission[6]='S';
else permission[6]='-';
if (perm & S_IROTH) permission[7]='r';
if (perm & S_IWOTH) permission[8]='w';
if (perm & S_IXOTH)
if (perm & S_ISVTX) permission[9]='t';
else permission[9]='x';
else
if (perm & S_ISVTX) permission[9]='T';
else permission[9]='-';
permission[10]='\0';
}
/*---------------------------------------------------------------------------*/
bool ftpd::pathallowed (char *path)
//*************************************************************************
//
// Checks, if a user may write to a directory
// returns TRUE if ok, FALSE else
//
//*************************************************************************
{
lastfunc("permissions");