1070 lines
30 KiB
C
1070 lines
30 KiB
C
/* FEATHERY FTP-Server
|
|
* Copyright (C) 2005-2010 Andreas Martin (andreas.martin@linuxmail.org)
|
|
* <https://sourceforge.net/projects/feathery>
|
|
*
|
|
* 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/*
|
|
DECLARATIVE SPECIFICATIONS
|
|
|
|
5.1. MINIMUM IMPLEMENTATION
|
|
|
|
In order to make FTP workable without needless error messages, the
|
|
following minimum implementation is required for all servers:
|
|
|
|
TYPE - ASCII Non-print
|
|
MODE - Stream
|
|
STRUCTURE - File, Record
|
|
COMMANDS - USER, QUIT, PORT,
|
|
TYPE, MODE, STRU,
|
|
for the default values
|
|
RETR, STOR,
|
|
NOOP.
|
|
|
|
The default values for transfer parameters are:
|
|
|
|
TYPE - ASCII Non-print
|
|
MODE - Stream
|
|
STRU - File
|
|
|
|
All hosts must accept the above as the standard defaults.
|
|
*/
|
|
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
|
|
#include "ftpTypes.h"
|
|
#include "ftpConfig.h"
|
|
#include "ftp.h"
|
|
#include "ftpIfc.h"
|
|
#include "ftpMessages.h"
|
|
|
|
|
|
LOCAL uint8_t scratchBuf[LEN_SCRATCHBUF];
|
|
|
|
int ftpSendMsg(msgmode_E mode, int sessionId, int ret, const char* msg)
|
|
{
|
|
int sentlen = 0;
|
|
int len = (int)strlen(msg);
|
|
char buf[6];
|
|
|
|
if(mode == MSG_QUOTE)
|
|
{
|
|
snprintf((char*)buf, 6,"%03d \"", ret);
|
|
sentlen += ftpSend(ftpGetSession(sessionId)->ctrlSocket, buf, 5);
|
|
sentlen += ftpSend(ftpGetSession(sessionId)->ctrlSocket, msg, len);
|
|
sentlen += ftpSend(ftpGetSession(sessionId)->ctrlSocket, "\"\r\n", 3);
|
|
}
|
|
else
|
|
{
|
|
snprintf((char*)buf, 6,"%03d ", ret);
|
|
sentlen += ftpSend(ftpGetSession(sessionId)->ctrlSocket, buf, 4);
|
|
sentlen += ftpSend(ftpGetSession(sessionId)->ctrlSocket, msg, len);
|
|
sentlen += ftpSend(ftpGetSession(sessionId)->ctrlSocket, "\r\n", 2);
|
|
}
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("%02d <-- %s%s\n", sessionId, buf, msg);
|
|
|
|
return sentlen;
|
|
}
|
|
|
|
int ftpExecTransmission(int sessionId)
|
|
{
|
|
int finished = FALSE;
|
|
size_t len;
|
|
ftpSession_S *pSession = ftpGetSession(sessionId);
|
|
transmission_S *pTrans = &pSession->activeTrans;
|
|
int rxLen;
|
|
|
|
|
|
pSession->timeLastCmd = ftpGetUnixTime();
|
|
switch(pTrans->op)
|
|
{
|
|
case OP_RETR:
|
|
len = ftpReadFile(scratchBuf, 1, LEN_SCRATCHBUF, pTrans->fsHandle);
|
|
if(len > 0)
|
|
{
|
|
pTrans->fileSize -= (uint32_t)len;
|
|
if(ftpSend(pTrans->dataSocket, scratchBuf, (int)len))
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 426, ftpMsg000);
|
|
finished = TRUE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR in ftpExecTransmission ftpReadFile returned = %d for sessionId = %d\n",(int)len,sessionId);
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 451, ftpMsg001);
|
|
finished = TRUE;
|
|
}
|
|
|
|
if(pTrans->fileSize == 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 226, ftpMsg002);
|
|
finished = TRUE;
|
|
}
|
|
break;
|
|
case OP_STOR:
|
|
rxLen = 0;
|
|
do
|
|
{
|
|
len = ftpReceive(pTrans->dataSocket, &scratchBuf[rxLen], LEN_SCRATCHBUF - rxLen);
|
|
|
|
if(len < 1) {
|
|
int errorNumber = getLastSocketError();
|
|
const char *errText = getLastSocketErrorText(&errorNumber);
|
|
if(VERBOSE_MODE_ENABLED) printf("ftpExecTransmission ERROR ON RECEIVE for socket = %d, data len = %d, error = %d [%s]\n",pTrans->dataSocket,(LEN_SCRATCHBUF - rxLen),errorNumber,errText);
|
|
|
|
break;
|
|
}
|
|
|
|
rxLen += (int)len;
|
|
} while(rxLen < LEN_SCRATCHBUF);
|
|
|
|
if(rxLen > 0)
|
|
{
|
|
size_t res = ftpWriteFile(scratchBuf, 1, rxLen, pTrans->fsHandle);
|
|
if(res != (size_t)rxLen)
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR in ftpExecTransmission ftpWriteFile returned = %d for sessionId = %d\n",(int)res,sessionId);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 451, ftpMsg001);
|
|
finished = TRUE;
|
|
}
|
|
}
|
|
|
|
if(len < 1)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 226, ftpMsg003);
|
|
finished = TRUE;
|
|
}
|
|
|
|
break;
|
|
case OP_LIST:
|
|
break;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
if(finished)
|
|
{
|
|
ftpCloseTransmission(sessionId);
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
LOCAL int ftpCmdUser(int sessionId, const char* args, int len)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 331, ftpMsg004);
|
|
ftpGetSession(sessionId)->userId = ftpFindAccount(args);
|
|
return 0;
|
|
}
|
|
LOCAL int ftpCmdPass(int sessionId, const char* args, int len)
|
|
{
|
|
if(!ftpCheckPassword(ftpGetSession(sessionId)->userId, args))
|
|
{
|
|
ftpAuthSession(sessionId);
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 230, ftpMsg005);
|
|
}
|
|
else
|
|
{
|
|
ftpGetSession(sessionId)->userId = 0;
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 530, ftpMsg006);
|
|
}
|
|
return 0;
|
|
}
|
|
LOCAL int ftpCmdSyst(int sessionId, const char* args, int len)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 215, "UNIX Type: L8");
|
|
|
|
return 0;
|
|
}
|
|
LOCAL int ftpCmdPort(int sessionId, const char* args, int len)
|
|
{
|
|
//char clientIp[16]="";
|
|
uint16_t clientPort=0;
|
|
|
|
int commaCnt = 0;
|
|
int n;
|
|
char* p;
|
|
|
|
for(n = 0; args[n] != '\0'; n++)
|
|
{
|
|
if(commaCnt <= 3) // Ip-Adresse
|
|
{
|
|
if(args[n] == ',')
|
|
{
|
|
commaCnt++;
|
|
// if(commaCnt < 4)
|
|
// clientIp[n] = '.';
|
|
// else
|
|
// clientIp[n] = '\0';
|
|
}
|
|
// else
|
|
// clientIp[n] = args[n];
|
|
}
|
|
else // Port-Nummer
|
|
{
|
|
p = (char*)&args[n];
|
|
clientPort = (uint16_t)(strtoul(p, &p, 0) << 8);
|
|
p++;
|
|
clientPort |= strtoul(p, &p, 0);
|
|
break;
|
|
}
|
|
}
|
|
if(ftpGetSession(sessionId)->passiveDataSocket >= 0)
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdPort about to Close socket = %d for sessionId = %d\n",ftpGetSession(sessionId)->passiveDataSocket,sessionId);
|
|
|
|
ftpUntrackSocket(ftpGetSession(sessionId)->passiveDataSocket);
|
|
ftpCloseSocket(&ftpGetSession(sessionId)->passiveDataSocket);
|
|
ftpGetSession(sessionId)->passiveDataSocket = -1;
|
|
}
|
|
//ftpGetSession(sessionId)->passiveDataSocket = -1;
|
|
ftpGetSession(sessionId)->remoteDataPort = clientPort;
|
|
ftpGetSession(sessionId)->passive = FALSE;
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 200, ftpMsg007);
|
|
|
|
return 0;
|
|
}
|
|
LOCAL int ftpCmdNoop(int sessionId, const char* args, int len)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 200, ftpMsg008);
|
|
|
|
return 0;
|
|
}
|
|
LOCAL int ftpCmdQuit(int sessionId, const char* args, int len)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 221, ftpMsg009);
|
|
return -1;
|
|
|
|
}
|
|
LOCAL int ftpCmdAbor(int sessionId, const char* args, int len)
|
|
{
|
|
ftpCloseTransmission(sessionId);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 226, ftpMsg040);
|
|
return 0;
|
|
|
|
}
|
|
#define ALL 0x80
|
|
#define LIST 1
|
|
#define NLST 2
|
|
#define MLST 4
|
|
#define MLSD 8
|
|
LOCAL int sendListing(socket_t dataSocket, int sessionId, const char* path, int format)
|
|
{
|
|
void *dir;
|
|
const char monName[12][4] = {
|
|
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
|
|
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
|
|
};
|
|
|
|
dir = ftpOpenDir(path);
|
|
if(dir)
|
|
{
|
|
const char* dirEntry = NULL;
|
|
int len = 0;
|
|
int err = 0;
|
|
ftpTime_S currTime = {0};
|
|
ftpPathInfo_S fileInfo;
|
|
int haveAnySuccessfulFiles = 0;
|
|
|
|
ftpGetLocalTime(&currTime);
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 150, ftpMsg010);
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("In sendListing about to read dir contents [%s] for sessionId = %d, dataSocket = %d\n", path,sessionId,dataSocket);
|
|
|
|
haveAnySuccessfulFiles = 0;
|
|
while((dirEntry = ftpReadDir(dir)) != NULL)
|
|
{
|
|
const char * realPath = ftpGetRealPath(sessionId, dirEntry, FALSE);
|
|
int statResult = ftpStat(realPath, &fileInfo);
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("ftpGetRealPath() returned [%s] stat() = %d\n", realPath, statResult);
|
|
|
|
if(statResult == 0)
|
|
{
|
|
if((format & ALL) == 0)
|
|
{
|
|
if(dirEntry[0] == '.')
|
|
continue;
|
|
}
|
|
if(format & LIST)
|
|
{
|
|
switch(fileInfo.type)
|
|
{
|
|
default:
|
|
case TYPE_FILE:
|
|
scratchBuf[0] = '-';
|
|
break;
|
|
case TYPE_DIR:
|
|
scratchBuf[0] = 'd';
|
|
break;
|
|
case TYPE_LINK:
|
|
scratchBuf[0] = 'l';
|
|
break;
|
|
}
|
|
|
|
if(currTime.year == fileInfo.mTime.year)
|
|
{
|
|
len = snprintf((char*)&scratchBuf[1], LEN_SCRATCHBUF-1,"rwxrwxrwx %4u %-8s %-8s %8u %s %02d %02d:%02d %s\r\n",
|
|
fileInfo.links,
|
|
fileInfo.user,
|
|
fileInfo.group,
|
|
fileInfo.size,
|
|
monName[fileInfo.mTime.month - 1],
|
|
fileInfo.mTime.day,
|
|
fileInfo.mTime.hour,
|
|
fileInfo.mTime.minute,
|
|
dirEntry);
|
|
}
|
|
else
|
|
{
|
|
len = snprintf((char*)&scratchBuf[1], LEN_SCRATCHBUF-1,"rwxrwxrwx %4u %-8s %-8s %8u %s %02d %5d %s\r\n",
|
|
fileInfo.links,
|
|
fileInfo.user,
|
|
fileInfo.group,
|
|
fileInfo.size,
|
|
monName[fileInfo.mTime.month - 1],
|
|
fileInfo.mTime.day,
|
|
fileInfo.mTime.year,
|
|
dirEntry);
|
|
}
|
|
ftpSend(dataSocket, scratchBuf, len + 1);
|
|
haveAnySuccessfulFiles = 1;
|
|
}
|
|
else if(format & NLST)
|
|
{
|
|
len = snprintf((char*)scratchBuf, LEN_SCRATCHBUF,"%s\r\n", dirEntry);
|
|
ftpSend(dataSocket, scratchBuf, len);
|
|
haveAnySuccessfulFiles = 1;
|
|
}
|
|
else if(format & MLSD)
|
|
{
|
|
if(!strcmp("..", dirEntry))
|
|
len = snprintf((char*)scratchBuf, LEN_SCRATCHBUF,"Type=pdir");
|
|
else
|
|
{
|
|
switch(fileInfo.type)
|
|
{
|
|
default:
|
|
case TYPE_FILE:
|
|
len = snprintf((char*)scratchBuf, LEN_SCRATCHBUF,"Type=file");
|
|
break;
|
|
case TYPE_DIR:
|
|
len = snprintf((char*)scratchBuf, LEN_SCRATCHBUF,"Type=dir");
|
|
break;
|
|
case TYPE_LINK:
|
|
len = snprintf((char*)scratchBuf, LEN_SCRATCHBUF,"Type=OS.unix=slink");
|
|
break;
|
|
}
|
|
}
|
|
ftpSend(dataSocket, scratchBuf, len);
|
|
len = snprintf((char*)scratchBuf, LEN_SCRATCHBUF,";Size=%u;Modify=%04d%02d%02d%02d%02d%02d;Perm=r; %s\r\n",
|
|
fileInfo.size,
|
|
fileInfo.mTime.year,
|
|
fileInfo.mTime.month,
|
|
fileInfo.mTime.day,
|
|
fileInfo.mTime.hour,
|
|
fileInfo.mTime.minute,
|
|
fileInfo.mTime.second,
|
|
dirEntry);
|
|
ftpSend(dataSocket, scratchBuf, len);
|
|
haveAnySuccessfulFiles = 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
err = 1;
|
|
//break;
|
|
}
|
|
}
|
|
|
|
ftpCloseDir(dir);
|
|
if(err && haveAnySuccessfulFiles == 0)
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR in sendListing err = %d, path = [%s] for sessionId = %d, dataSocket = %d\n",err,path,sessionId,dataSocket);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 451, ftpMsg039);
|
|
}
|
|
else
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 226, ftpMsg013);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR opendir [%s] returned errno: %#x for sessionId = %d, dataSocket = %d\n", path,errno,sessionId,dataSocket);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 451, ftpMsg038);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdList(int sessionId, const char* args, int len)
|
|
{
|
|
const char* realPath;
|
|
socket_t s;
|
|
//#### Funktioniert nicht wenn Pfad übergeben wird
|
|
/* if(args[0] != '\0')
|
|
{
|
|
if(args[0] != '-')
|
|
realPath = ftpGetRealPath(sessionId, args);
|
|
}
|
|
else*/
|
|
realPath = ftpGetRealPath(sessionId, ftpGetSession(sessionId)->workingDir, TRUE);
|
|
|
|
if(ftpGetSession(sessionId)->passive == FALSE)
|
|
{
|
|
s = ftpEstablishDataConnection(FALSE, &ftpGetSession(sessionId)->remoteIp, &ftpGetSession(sessionId)->remoteDataPort,sessionId);
|
|
if(s < 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg011);
|
|
return 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
s = ftpAcceptDataConnection(ftpGetSession(sessionId)->passiveDataSocket);
|
|
if(s < 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg012);
|
|
return 1;
|
|
}
|
|
}
|
|
sendListing(s, sessionId, realPath, LIST);
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdList about to Close socket = %d for sessionId = %d\n",s,sessionId);
|
|
ftpUntrackSocket(s);
|
|
ftpCloseSocket(&s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdNlst(int sessionId, const char* args, int len)
|
|
{
|
|
//#### -List kann auch Argumente haben
|
|
const char* realPath;
|
|
socket_t s;
|
|
|
|
/* if(pfad übergeben)
|
|
realPath = ftpGetRealPath(sessionId, args);
|
|
else*/
|
|
realPath = ftpGetRealPath(sessionId, ftpGetSession(sessionId)->workingDir, TRUE);
|
|
|
|
if(ftpGetSession(sessionId)->passive == FALSE)
|
|
{
|
|
s = ftpEstablishDataConnection(FALSE, &ftpGetSession(sessionId)->remoteIp, &ftpGetSession(sessionId)->remoteDataPort,sessionId);
|
|
if(s < 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg011);
|
|
return 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
s = ftpAcceptDataConnection(ftpGetSession(sessionId)->passiveDataSocket);
|
|
if(s < 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg012);
|
|
return 1;
|
|
}
|
|
}
|
|
sendListing(s, sessionId, realPath, NLST);
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdNlst about to Close socket = %d for sessionId = %d\n",s,sessionId);
|
|
ftpUntrackSocket(s);
|
|
ftpCloseSocket(&s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdRetr(int sessionId, const char* args, int len)
|
|
{
|
|
ftpPathInfo_S fileInfo;
|
|
const char* realPath = ftpGetRealPath(sessionId, args, TRUE);
|
|
socket_t s;
|
|
void *fp;
|
|
int statResult = 0;
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdRetr args [%s] realPath [%s]\n", args, realPath);
|
|
|
|
statResult = ftpStat(realPath, &fileInfo);
|
|
if(VERBOSE_MODE_ENABLED) printf("stat() = %d fileInfo.type = %d\n", statResult,fileInfo.type);
|
|
|
|
if(statResult || (fileInfo.type != TYPE_FILE)) // file accessible?
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR In ftpCmdRetr [file not available] args [%s] realPath [%s]\n", args, realPath);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 550, ftpMsg032);
|
|
return 2;
|
|
}
|
|
|
|
if(ftpIsClientAllowedToGetFile != NULL) {
|
|
if(ftpIsClientAllowedToGetFile(ftpGetSession(sessionId)->remoteIp,ftpFindAccountById(ftpGetSession(sessionId)->userId),realPath) != 1) {
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR In ftpCmdRetr FILE DISALLOWED By MGserver [file not available] args [%s] realPath [%s]\n", args, realPath);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 550, ftpMsg032);
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
|
|
if(ftpGetSession(sessionId)->passive == FALSE)
|
|
{
|
|
s = ftpEstablishDataConnection(FALSE, &ftpGetSession(sessionId)->remoteIp, &ftpGetSession(sessionId)->remoteDataPort,sessionId);
|
|
if(s < 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg011);
|
|
return 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdRetr about accept passive data connection, args [%s] realPath [%s]\n", args, realPath);
|
|
|
|
s = ftpAcceptDataConnection(ftpGetSession(sessionId)->passiveDataSocket);
|
|
if(s < 0)
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR In ftpCmdRetr failed to accept data connection, args [%s] realPath [%s]\n", args, realPath);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg012);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 150, ftpMsg014);
|
|
|
|
fp = ftpOpenFile(realPath, "rb");
|
|
if(fp)
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdRetr opened realPath [%s] [%p] for sessionId = %d for socket = %d\n",realPath,fp,sessionId,s);
|
|
|
|
ftpOpenTransmission(sessionId, OP_RETR, fp, s, fileInfo.size);
|
|
ftpExecTransmission(sessionId);
|
|
}
|
|
else
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR in ftpCmdRetr could not open realPath [%s] for sessionId = %d for socket = %d\n",realPath,sessionId,s);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 451, ftpMsg015);
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdRetr about to Close socket = %d for sessionId = %d\n",s,sessionId);
|
|
ftpUntrackSocket(s);
|
|
ftpCloseSocket(&s);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdStor(int sessionId, const char* args, int len)
|
|
{
|
|
socket_t s;
|
|
void* fp;
|
|
const char* realPath = ftpGetRealPath(sessionId, args, TRUE);
|
|
|
|
if(ftpGetSession(sessionId)->passive == FALSE)
|
|
{
|
|
s = ftpEstablishDataConnection(FALSE, &ftpGetSession(sessionId)->remoteIp, &ftpGetSession(sessionId)->remoteDataPort,sessionId);
|
|
if(s < 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg011);
|
|
return 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
s = ftpAcceptDataConnection(ftpGetSession(sessionId)->passiveDataSocket);
|
|
if(s < 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg012);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 150, ftpMsg016);
|
|
|
|
fp = ftpOpenFile(realPath, "wb");
|
|
if(fp)
|
|
{
|
|
ftpOpenTransmission(sessionId, OP_STOR, fp, s, 0);
|
|
ftpExecTransmission(sessionId);
|
|
}
|
|
else
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR in ftpCmdStor could not open realPath [%s]\n",realPath);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 451, ftpMsg015);
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdStor about to Close socket = %d for sessionId = %d\n",s,sessionId);
|
|
|
|
ftpUntrackSocket(s);
|
|
ftpCloseSocket(&s);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdDele(int sessionId, const char* args, int len)
|
|
{
|
|
const char* realPath = ftpGetRealPath(sessionId, args, TRUE);
|
|
if(ftpRemoveFile(realPath))
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 450, ftpMsg018);
|
|
else
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 250, ftpMsg019);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdMkd(int sessionId, const char* args, int len)
|
|
{
|
|
const char* realPath = ftpGetRealPath(sessionId, args, TRUE);
|
|
if(ftpMakeDir(realPath))
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 550, ftpMsg020);
|
|
else
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 250, ftpMsg021);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdRmd(int sessionId, const char* args, int len)
|
|
{
|
|
const char* realPath = ftpGetRealPath(sessionId, args, TRUE);
|
|
if(ftpRemoveDir(realPath))
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 550, ftpMsg022);
|
|
else
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 250, ftpMsg023);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdPwd(int sessionId, const char* args, int len)
|
|
{
|
|
if(ftpGetSession(sessionId)->workingDir[0])
|
|
ftpSendMsg(MSG_QUOTE, sessionId, 257, ftpGetSession(sessionId)->workingDir);
|
|
else
|
|
ftpSendMsg(MSG_QUOTE, sessionId, 257, "/");
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdCwd(int sessionId, const char* args, int len)
|
|
{
|
|
if(ftpChangeDir(sessionId, args) == 0)
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 250, ftpMsg024);
|
|
else
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 550, ftpMsg025);
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdType(int sessionId, const char* args, int len)
|
|
{
|
|
switch(args[0])
|
|
{
|
|
case 'I':
|
|
case 'i':
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 200, ftpMsg026);
|
|
ftpGetSession(sessionId)->binary = TRUE;
|
|
break;
|
|
case 'A':
|
|
case 'a':
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 200, ftpMsg027);
|
|
ftpGetSession(sessionId)->binary = FALSE;
|
|
break;
|
|
default:
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 504, ftpMsg028);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdPasv(int sessionId, const char* args, int len)
|
|
{
|
|
uint16_t port;
|
|
uint32_t ip;
|
|
char str[50];
|
|
socket_t s;
|
|
uint32_t remoteFTPServerIp;
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdPasv sessionId = %d, ftpGetSession(sessionId)->passiveDataSocket = %d\n", sessionId, ftpGetSession(sessionId)->passiveDataSocket);
|
|
|
|
if(ftpGetSession(sessionId)->passiveDataSocket <= 0)
|
|
{
|
|
//if(VERBOSE_MODE_ENABLED) printf("In ftpCmdPasv about to Close socket = %d for sessionId = %d\n",ftpGetSession(sessionId)->passiveDataSocket,sessionId);
|
|
|
|
//ftpUntrackSocket(ftpGetSession(sessionId)->passiveDataSocket);
|
|
//ftpCloseSocket(&ftpGetSession(sessionId)->passiveDataSocket);
|
|
//}
|
|
//ftpGetSession(sessionId)->passiveDataSocket = -1;
|
|
s = ftpEstablishDataConnection(TRUE, &ip, &port,sessionId);
|
|
if(s < 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg012);
|
|
return 1;
|
|
}
|
|
ftpGetSession(sessionId)->passiveDataSocket = s;
|
|
ftpGetSession(sessionId)->passiveIp = ip;
|
|
ftpGetSession(sessionId)->passivePort = port;
|
|
}
|
|
else
|
|
{
|
|
s = ftpGetSession(sessionId)->passiveDataSocket;
|
|
ip = ftpGetSession(sessionId)->passiveIp;
|
|
port = ftpGetSession(sessionId)->passivePort;
|
|
}
|
|
|
|
//if(VERBOSE_MODE_ENABLED) printf("In ftpCmdPasv sessionId = %d, client IP = %u, remote IP = %u, port = %d, ftpAddUPNPPortForward = %p, ftpRemoveUPNPPortForward = %p using listener socket = %d\n",
|
|
// sessionId, ftpGetSession(sessionId)->remoteIp, ftpFindExternalFTPServerIp(ftpGetSession(sessionId)->remoteIp), port,ftpAddUPNPPortForward,ftpRemoveUPNPPortForward,s);
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdPasv sessionId = %d, client IP = %u, remote IP = %u, port = %d, using listener socket = %d\n",
|
|
sessionId, ftpGetSession(sessionId)->remoteIp, ftpFindExternalFTPServerIp(ftpGetSession(sessionId)->remoteIp), port,s);
|
|
|
|
if(ftpAddUPNPPortForward != NULL && ftpFindExternalFTPServerIp(ftpGetSession(sessionId)->remoteIp) != 0)
|
|
{
|
|
ftpGetSession(sessionId)->remoteFTPServerPassivePort = port;
|
|
|
|
//if(VERBOSE_MODE_ENABLED) printf("In ftpCmdPasv sessionId = %d, adding UPNP port forward\n", sessionId);
|
|
//ftpAddUPNPPortForward(port, port);
|
|
|
|
remoteFTPServerIp = ftpFindExternalFTPServerIp(ftpGetSession(sessionId)->remoteIp);
|
|
|
|
snprintf(str, 50,"%s (%d,%d,%d,%d,%d,%d)",
|
|
ftpMsg029,
|
|
(remoteFTPServerIp >> 24) & 0xFF,
|
|
(remoteFTPServerIp >> 16) & 0xFF,
|
|
(remoteFTPServerIp >> 8) & 0xFF,
|
|
remoteFTPServerIp & 0xFF,
|
|
(port >> 8) & 0xFF,
|
|
port & 0xFF);
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdPasv sessionId = %d, str [%s]\n", sessionId, str);
|
|
|
|
}
|
|
else
|
|
{
|
|
snprintf(str, 50,"%s (%d,%d,%d,%d,%d,%d)",
|
|
ftpMsg029,
|
|
(ip >> 24) & 0xFF,
|
|
(ip >> 16) & 0xFF,
|
|
(ip >> 8) & 0xFF,
|
|
ip & 0xFF,
|
|
(port >> 8) & 0xFF,
|
|
port & 0xFF);
|
|
}
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdPasv sessionId = %d, ftpGetSession(sessionId)->passiveDataSocket = %d SENDING 227 to client\n", sessionId, ftpGetSession(sessionId)->passiveDataSocket);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 227, str);
|
|
ftpGetSession(sessionId)->passive = TRUE;
|
|
return 0;
|
|
}
|
|
LOCAL int ftpCmdCdup(int sessionId, const char* args, int len)
|
|
{
|
|
return ftpCmdCwd(sessionId, "..", 2);
|
|
}
|
|
LOCAL int ftpCmdStru(int sessionId, const char* args, int len)
|
|
{
|
|
switch(args[0])
|
|
{
|
|
case 'F':
|
|
case 'f':
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 200, ftpMsg030);
|
|
break;
|
|
default:
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 504, ftpMsg031);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#if RFC3659
|
|
LOCAL int ftpCmdSize(int sessionId, const char* args, int len)
|
|
{
|
|
int ret;
|
|
char str[12];
|
|
ftpPathInfo_S fileInfo;
|
|
const char* realPath = ftpGetRealPath(sessionId, args, TRUE);
|
|
|
|
ret = ftpStat(realPath, &fileInfo);
|
|
if(ret)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 550, ftpMsg032);
|
|
return 2;
|
|
}
|
|
|
|
snprintf(str, 12,"%d", fileInfo.size);
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 213, str);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdMdtm(int sessionId, const char* args, int len)
|
|
{
|
|
int ret;
|
|
char str[15];
|
|
ftpPathInfo_S fileInfo;
|
|
const char* realPath = ftpGetRealPath(sessionId, args, TRUE);
|
|
|
|
ret = ftpStat(realPath, &fileInfo);
|
|
if(ret)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 550, ftpMsg032);
|
|
return 2;
|
|
}
|
|
|
|
snprintf(str, 15,"%04d%02d%02d%02d%02d%02d", fileInfo.mTime.year,
|
|
fileInfo.mTime.month,
|
|
fileInfo.mTime.day,
|
|
fileInfo.mTime.hour,
|
|
fileInfo.mTime.minute,
|
|
fileInfo.mTime.second);
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 213, str);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
LOCAL int ftpCmdMlst(int sessionId, const char* args, int len)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 550, "MLST command not implemented");
|
|
|
|
return 0;
|
|
}
|
|
/*LOCAL int ftpCmdMlsd(int sessionId, const char* args, int len)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 550, "MLSD command not implemented");
|
|
|
|
return 0;
|
|
}*/
|
|
LOCAL int ftpCmdMlsd(int sessionId, const char* args, int len)
|
|
{
|
|
const char* realPath;
|
|
socket_t s;
|
|
//#### Funktioniert nicht wenn Pfad übergeben wird
|
|
/* if(args[0] != '\0')
|
|
{
|
|
if(args[0] != '-')
|
|
realPath = ftpGetRealPath(sessionId, args);
|
|
}
|
|
else*/
|
|
realPath = ftpGetRealPath(sessionId, ftpGetSession(sessionId)->workingDir, TRUE);
|
|
|
|
if(ftpGetSession(sessionId)->passive == FALSE)
|
|
{
|
|
s = ftpEstablishDataConnection(FALSE, &ftpGetSession(sessionId)->remoteIp, &ftpGetSession(sessionId)->remoteDataPort,sessionId);
|
|
if(s < 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg011);
|
|
return 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
s = ftpAcceptDataConnection(ftpGetSession(sessionId)->passiveDataSocket);
|
|
if(s < 0)
|
|
{
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 425, ftpMsg012);
|
|
return 1;
|
|
}
|
|
}
|
|
sendListing(s, sessionId, realPath, MLSD);
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("In ftpCmdMlsd about to Close socket = %d for sessionId = %d\n",s,sessionId);
|
|
ftpUntrackSocket(s);
|
|
ftpCloseSocket(&s);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
typedef struct
|
|
{
|
|
char cmdToken[5]; ///< command-string
|
|
int tokLen; ///< len of cmdToken
|
|
int neededRights; ///< required access rights for executing the command
|
|
int needLogin; ///< if TRUE, command needs successful authentication via USER and PASS
|
|
int reportFeat; ///< if TRUE, command is reported via FEAT
|
|
int duringTransfer; ///< if TRUE, command can be executed during a file transfer
|
|
int (*handler)(int, const char*, int); ///< handler function
|
|
}ftpCommand_S;
|
|
|
|
static const ftpCommand_S cmds[] = {
|
|
{"USER", 4, 0, FALSE, FALSE, FALSE, ftpCmdUser},
|
|
{"PASS", 4, 0, FALSE, FALSE, FALSE, ftpCmdPass},
|
|
{"SYST", 4, 0, TRUE, FALSE, FALSE, ftpCmdSyst},
|
|
{"PORT", 4, 0, TRUE, FALSE, FALSE, ftpCmdPort},
|
|
{"NOOP", 4, 0, TRUE, FALSE, FALSE, ftpCmdNoop},
|
|
{"QUIT", 4, 0, FALSE, FALSE, TRUE, ftpCmdQuit},
|
|
{"ABOR", 4, 0, FALSE, FALSE, TRUE, ftpCmdAbor},
|
|
{"LIST", 4, FTP_ACC_LS, TRUE, FALSE, FALSE, ftpCmdList},
|
|
{"NLST", 4, FTP_ACC_LS, TRUE, FALSE, FALSE, ftpCmdNlst},
|
|
{"PWD", 3, FTP_ACC_RD, TRUE, FALSE, FALSE, ftpCmdPwd},
|
|
{"XPWD", 4, FTP_ACC_DIR, TRUE, FALSE, FALSE, ftpCmdPwd},
|
|
{"TYPE", 4, 0, TRUE, FALSE, FALSE, ftpCmdType},
|
|
{"PASV", 4, 0, TRUE, FALSE, FALSE, ftpCmdPasv},
|
|
{"CWD", 3, FTP_ACC_DIR, TRUE, FALSE, FALSE, ftpCmdCwd},
|
|
{"CDUP", 4, FTP_ACC_DIR, TRUE, FALSE, FALSE, ftpCmdCdup},
|
|
{"STRU", 4, 0, TRUE, FALSE, FALSE, ftpCmdStru},
|
|
{"RETR", 4, FTP_ACC_RD, TRUE, FALSE, FALSE, ftpCmdRetr},
|
|
{"STOR", 4, FTP_ACC_WR, TRUE, FALSE, FALSE, ftpCmdStor},
|
|
{"DELE", 4, FTP_ACC_WR, TRUE, FALSE, FALSE, ftpCmdDele},
|
|
{"MKD" , 3, FTP_ACC_WR, TRUE, FALSE, FALSE, ftpCmdMkd},
|
|
{"XMKD", 4, FTP_ACC_WR, TRUE, FALSE, FALSE, ftpCmdMkd},
|
|
{"RMD" , 3, FTP_ACC_WR, TRUE, FALSE, FALSE, ftpCmdRmd},
|
|
{"XRMD", 4, FTP_ACC_WR, TRUE, FALSE, FALSE, ftpCmdRmd},
|
|
#if RFC3659
|
|
{"SIZE", 4, FTP_ACC_RD, TRUE, TRUE, FALSE, ftpCmdSize},
|
|
{"MDTM", 4, FTP_ACC_RD, TRUE, TRUE, FALSE, ftpCmdMdtm},
|
|
{"MLST", 4, FTP_ACC_RD, TRUE, TRUE, FALSE, ftpCmdMlst},
|
|
{"MLSD", 4, FTP_ACC_LS, TRUE, TRUE, FALSE, ftpCmdMlsd}
|
|
#endif
|
|
};
|
|
|
|
int execFtpCmd(int sessionId, const char* cmd, int cmdlen)
|
|
{
|
|
int n;
|
|
int ret = 0;
|
|
|
|
ftpSession_S *pSession = ftpGetSession(sessionId);
|
|
|
|
//if(VERBOSE_MODE_ENABLED) printf("In execFtpCmd ARRAY_SIZE(cmds) = %lu for sessionId = %d\n",ARRAY_SIZE(cmds),sessionId);
|
|
if(VERBOSE_MODE_ENABLED) printf("In execFtpCmd cmd [%s] for sessionId = %d\n",cmd,sessionId);
|
|
|
|
for(n = 0; n < (int)ARRAY_SIZE(cmds); n++)
|
|
{
|
|
if(!strncmp(cmds[n].cmdToken, cmd, cmds[n].tokLen))
|
|
{
|
|
int i = cmds[n].tokLen;
|
|
|
|
if(cmds[n].needLogin)
|
|
{
|
|
if((pSession->userId == 0) || (pSession->authenticated == FALSE))
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("In execFtpCmd User NOT loggedin for sessionId = %d\n",sessionId);
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 530, ftpMsg033);
|
|
return 0;
|
|
}
|
|
if(ftpCheckAccRights(pSession->userId, cmds[n].neededRights))
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("In execFtpCmd User has no ACCESS for sessionId = %d\n",sessionId);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 550, ftpMsg034);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if((pSession->activeTrans.op != OP_NOP)) // transfer in progress?
|
|
{
|
|
if(cmds[n].duringTransfer == FALSE) // command during transfer allowed?
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("In execFtpCmd got command during transfer, discarding for sessionId = %d\n",sessionId);
|
|
return 0; // no => silently discard command
|
|
}
|
|
}
|
|
|
|
while(cmd[i] != '\0')
|
|
{
|
|
if((cmd[i] != ' ') && (cmd[i] != '\t'))
|
|
break;
|
|
|
|
i++;
|
|
}
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("About to execute cmds[n].cmdToken [%s] command [%s] for sessionId = %d\n",cmds[n].cmdToken,&cmd[i],sessionId);
|
|
|
|
ret = cmds[n].handler(sessionId, &cmd[i], (int)strlen(&cmd[i])); // execute command
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("Executed cmds[n].cmdToken [%s] command [%s] ret = %d for sessionId = %d\n",cmds[n].cmdToken,&cmd[i],ret,sessionId);
|
|
|
|
pSession->timeLastCmd = ftpGetUnixTime();
|
|
return ret;
|
|
}
|
|
else
|
|
{
|
|
//if(VERBOSE_MODE_ENABLED) printf("In execFtpCmd SKIPPED COMMAND cmds[n].cmdToken = [%s] n = %d for sessionId = %d\n",cmds[n].cmdToken,n,sessionId);
|
|
}
|
|
}
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR UNKNOWN COMMAND cmd [%s] for sessionId = %d\n",cmd,sessionId);
|
|
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 500, cmd); // reject unknown commands
|
|
pSession->timeLastCmd = ftpGetUnixTime();
|
|
return ret;
|
|
}
|
|
|
|
void ftpParseCmd(int sessionId)
|
|
{
|
|
ftpSession_S *pSession;
|
|
int len;
|
|
socket_t ctrlSocket;
|
|
|
|
pSession = ftpGetSession(sessionId);
|
|
len = pSession->rxBufWriteIdx;
|
|
ctrlSocket = pSession->ctrlSocket;
|
|
|
|
if((pSession->rxBuf[len - 1] == '\n') &&
|
|
(pSession->rxBuf[len - 2] == '\r') ) // command correctly terminated?
|
|
{
|
|
int c = 0;
|
|
pSession->rxBuf[len - 2] = '\0';
|
|
pSession->rxBufWriteIdx = 0;
|
|
|
|
for(c = 0; c < len; c++) // convert command token to uppercase
|
|
{
|
|
if(isspace(pSession->rxBuf[c]))
|
|
break;
|
|
pSession->rxBuf[c] = toupper(pSession->rxBuf[c]);
|
|
}
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("%02d --> %s for socket: %d\n", sessionId, pSession->rxBuf,ctrlSocket);
|
|
|
|
if(execFtpCmd(sessionId, pSession->rxBuf, len - 2) == -1)
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("In execFtpCmd command triggered close for socket: %d!\n",ctrlSocket);
|
|
|
|
ftpUntrackSocket(ctrlSocket);
|
|
ftpCloseSession(sessionId);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR In execFtpCmd problem with parsing string [%s] for socket: %d!\n",pSession->rxBuf,ctrlSocket);
|
|
}
|
|
|
|
if(pSession->rxBufWriteIdx >= LEN_RXBUF) // overflow of receive buffer?
|
|
{
|
|
pSession->rxBufWriteIdx = 0;
|
|
ftpSendMsg(MSG_NORMAL, sessionId, 500, ftpMsg035);
|
|
|
|
if(VERBOSE_MODE_ENABLED) printf("ERROR: Receive buffer overflow. Received data discarded.\n");
|
|
}
|
|
}
|
|
|