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ftpCommandElaborate.c
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/*
* The MIT License
*
* Copyright 2018 Ugo Cirmignani.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include "ftpData.h"
#include "ftpServer.h"
#include "library/logFunctions.h"
#include "library/fileManagement.h"
#include "library/configRead.h"
#include "library/openSsl.h"
#include "library/connection.h"
#include "ftpCommandsElaborate.h"
/* Elaborate the User login command */
int parseCommandUser(ftpDataType * data, int socketId)
{
int returnCode;
char *theUserName;
theUserName = getFtpCommandArg("USER", data->clients[socketId].theCommandReceived, 0);
if (strlen(theUserName) >= 1)
{
setDynamicStringDataType(&data->clients[socketId].login.name, theUserName, strlen(theUserName));
returnCode = socketPrintf(data, socketId, "s", "331 User ok, Waiting for the password.\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
else
{
returnCode = socketPrintf(data, socketId, "s", "430 Invalid username.\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
}
/* Elaborate the User login command */
int parseCommandSite(ftpDataType * data, int socketId)
{
int returnCode, setPermissionsReturnCode;
char *theCommand;
theCommand = getFtpCommandArg("SITE", data->clients[socketId].theCommandReceived, 0);
if(compareStringCaseInsensitive(theCommand, "CHMOD", strlen("CHMOD")) == 1)
{
setPermissionsReturnCode = setPermissions(theCommand, data->clients[socketId].login.absolutePath.text, data->clients[socketId].login.ownerShip);
switch (setPermissionsReturnCode)
{
case FTP_CHMODE_COMMAND_RETURN_CODE_OK:
{
returnCode = socketPrintf(data, socketId, "s", "200 Permissions changed\r\n");
}
break;
case FTP_CHMODE_COMMAND_RETURN_CODE_NO_FILE:
{
returnCode = socketPrintf(data, socketId, "s", "550 chmod no such file\r\n");
}
break;
case FTP_CHMODE_COMMAND_RETURN_CODE_NO_PERMISSIONS:
{
returnCode = socketPrintf(data, socketId, "s", "550 Some errors occurred while changing file permissions.\r\n");
}
break;
case FTP_CHMODE_COMMAND_RETURN_NAME_TOO_LONG:
default:
{
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
break;
}
}
else
{
returnCode = socketPrintf(data, socketId, "s", "500 unknown extension\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
return FTP_COMMAND_PROCESSED;
}
int parseCommandPass(ftpDataType * data, int socketId)
{
int returnCode;
char *thePass;
loginFailsDataType element;
int searchPosition = -1;
thePass = getFtpCommandArg("PASS", data->clients[socketId].theCommandReceived, 0);
strcpy(element.ipAddress, data->clients[socketId].clientIpAddress);
element.failTimeStamp = time(NULL);
element.failureNumbers = 1;
searchPosition = data->loginFailsVector.SearchElement(&data->loginFailsVector, &element);
if (searchPosition != -1)
{
if (element.failTimeStamp - ((loginFailsDataType *) data->loginFailsVector.Data[searchPosition])->failTimeStamp < WRONG_PASSWORD_ALLOWED_RETRY_TIME)
{
if (((loginFailsDataType *) data->loginFailsVector.Data[searchPosition])->failureNumbers >= data->ftpParameters.maximumUserAndPassowrdLoginTries)
{
printf("\n TOO MANY LOGIN FAILS! \n");
data->clients[socketId].closeTheClient = 1;
returnCode = socketPrintf(data, socketId, "s", "430 Too many login failure detected, your ip will be blacklisted for 5 minutes\r\n");
if (returnCode <= 0) return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
}
}
if (strlen(thePass) >= 1)
{
int searchUserNameIndex;
searchUserNameIndex = searchUser(data->clients[socketId].login.name.text, &data->ftpParameters.usersVector);
if (searchUserNameIndex < 0 ||
(strcmp(((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->password, thePass) != 0))
{
//Record the login fail!
if (searchPosition == -1)
{
if (data->ftpParameters.maximumUserAndPassowrdLoginTries != 0)
data->loginFailsVector.PushBack(&data->loginFailsVector, &element, sizeof(loginFailsDataType));
}
else
{
((loginFailsDataType *) data->loginFailsVector.Data[searchPosition])->failureNumbers++;
((loginFailsDataType *) data->loginFailsVector.Data[searchPosition])->failTimeStamp = time(NULL);
}
returnCode = socketPrintf(data, socketId, "s", "430 Invalid username or password\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
else
{
setDynamicStringDataType(&data->clients[socketId].login.password, thePass, strlen(thePass));
setDynamicStringDataType(&data->clients[socketId].login.absolutePath, ((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->homePath, strlen(((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->homePath));
setDynamicStringDataType(&data->clients[socketId].login.homePath, ((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->homePath, strlen(((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->homePath));
setDynamicStringDataType(&data->clients[socketId].login.ftpPath, "/", strlen("/"));
data->clients[socketId].login.ownerShip.ownerShipSet = ((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->ownerShip.ownerShipSet;
data->clients[socketId].login.ownerShip.gid = ((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->ownerShip.gid;
data->clients[socketId].login.ownerShip.uid = ((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->ownerShip.uid;
data->clients[socketId].login.userLoggedIn = 1;
returnCode = socketPrintf(data, socketId, "s", "230 Login Ok.\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
return FTP_COMMAND_PROCESSED;
}
else
{
//Record the login fail!
if (searchPosition == -1)
{
if (data->ftpParameters.maximumUserAndPassowrdLoginTries != 0)
data->loginFailsVector.PushBack(&data->loginFailsVector, &element, sizeof(loginFailsDataType));
}
else
{
((loginFailsDataType *) data->loginFailsVector.Data[searchPosition])->failureNumbers++;
((loginFailsDataType *) data->loginFailsVector.Data[searchPosition])->failTimeStamp = time(NULL);
}
returnCode = socketPrintf(data, socketId, "s", "430 Invalid username or password\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return 1;
}
}
int parseCommandAuth(ftpDataType * data, int socketId)
{
int returnCode, returnCodeTls;
#ifndef OPENSSL_ENABLED
returnCode = socketPrintf(data, socketId, "s", "502 Security extensions not implemented.\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
#endif
#ifdef OPENSSL_ENABLED
returnCode = socketPrintf(data, socketId, "s", "234 AUTH TLS OK..\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
returnCode = SSL_set_fd(data->clients[socketId].ssl, data->clients[socketId].socketDescriptor);
if (returnCode == 0)
{
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
returnCodeTls = SSL_accept(data->clients[socketId].ssl);
data->clients[socketId].tlsNegotiatingTimeStart = (int)time(NULL);
if (returnCodeTls <= 0)
{
printf("\nSSL NOT YET ACCEPTED: %d", returnCodeTls);
data->clients[socketId].tlsIsEnabled = 0;
data->clients[socketId].tlsIsNegotiating = 1;
}
else
{
printf("\nSSL ACCEPTED");
data->clients[socketId].tlsIsEnabled = 1;
data->clients[socketId].tlsIsNegotiating = 0;
}
#endif
return FTP_COMMAND_PROCESSED;
}
int parseCommandPwd(ftpDataType * data, int socketId)
{
int returnCode;
returnCode = socketPrintf(data, socketId, "sss", "257 \"", data->clients[socketId].login.ftpPath.text ,"\" is your current location\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandSyst(ftpDataType * data, int socketId)
{
int returnCode;
returnCode = socketPrintf(data, socketId, "s", "215 UNIX Type: L8\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandFeat(ftpDataType * data, int socketId)
{
/*
211-Extensions supported:
EPRT
IDLE
MDTM
SIZE
MFMT
REST STREAM
MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;
MLSD
AUTH TLS
PBSZ
PROT
UTF8
TVFS
ESTA
PASV
EPSV
SPSV
ESTP
211 End.
211-Extensions supported:
EPRT
IDLE
MDTM
SIZE
MFMT
REST STREAM
MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;
MLSD
AUTH TLS
PBSZ
PROT
UTF8
TVFS
ESTA
PASV
EPSV
SPSV
ESTP
211 End.
*/
int returnCode;
#ifdef OPENSSL_ENABLED
returnCode = socketPrintf(data, socketId, "s", "211-Extensions supported:\r\nPASV\r\nUTF8\r\nAUTH TLS\r\nPBSZ\r\nPROT\r\n211 End.\r\n");
#endif
#ifndef OPENSSL_ENABLED
returnCode = socketPrintf(data, socketId, "s", "211-Extensions supported:\r\nPASV\r\nUTF8\r\n211 End.\r\n");
#endif
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandProt(ftpDataType * data, int socketId)
{
int returnCode;
char *theProtArg;
theProtArg = getFtpCommandArg("PROT", data->clients[socketId].theCommandReceived, 0);
if (theProtArg[0] == 'C' || theProtArg[0] == 'c')
{
//Clear
printf("\nSet data channel to clear");
data->clients[socketId].dataChannelIsTls = 0;
returnCode = socketPrintf(data, socketId, "scs", "200 PROT set to ", theProtArg[0], "\r\n");
}
else if (theProtArg[0] == 'P' || theProtArg[0] == 'p')
{
//Private
printf("\nSet data channel to private");
data->clients[socketId].dataChannelIsTls = 1;
returnCode = socketPrintf(data, socketId, "scs", "200 PROT set to ", theProtArg[0], "\r\n");
}
else
{
returnCode = socketPrintf(data, socketId, "scs", "502 Mode ", theProtArg[0]," is not implemented\r\n");
}
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandCcc(ftpDataType * data, int socketId)
{
int returnCode;
#ifdef OPENSSL_ENABLED
returnCode = socketPrintf(data, socketId, "s", "200 TLS connection aborted\r\n");
SSL_set_shutdown(data->clients[socketId].ssl, SSL_SENT_SHUTDOWN);
data->clients[socketId].tlsIsEnabled = 0;
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
#endif
#ifndef OPENSSL_ENABLED
returnCode = socketPrintf(data, socketId, "s", "500 command not supported\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
#endif
return FTP_COMMAND_PROCESSED;
}
int parseCommandPbsz(ftpDataType * data, int socketId)
{
int returnCode;
char *thePbszSize;
thePbszSize = getFtpCommandArg("PBSZ", data->clients[socketId].theCommandReceived, 0);
returnCode = socketPrintf(data, socketId, "sss", "200 PBSZ set to ", thePbszSize, "\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandTypeA(ftpDataType * data, int socketId)
{
int returnCode;
returnCode = socketPrintf(data, socketId, "s", "200 TYPE is now 8-bit binary\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandTypeI(ftpDataType * data, int socketId)
{
int returnCode;
returnCode = socketPrintf(data, socketId, "s", "200 TYPE is now 8-bit binary\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandStruF(ftpDataType * data, int socketId)
{
int returnCode;
returnCode = socketPrintf(data, socketId, "s", "200 TYPE is now 8-bit binary\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandModeS(ftpDataType * data, int socketId)
{
int returnCode;
returnCode = socketPrintf(data, socketId, "s", "200 TYPE is now 8-bit binary\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandPasv(ftpDataType * data, int socketId)
{
/* Create worker thread */
void *pReturn;
int returnCode;
//printf("\n data->clients[%d].workerData.workerThread = %d",socketId, (int)data->clients[socketId].workerData.workerThread);
printf("\n data->clients[%d].workerData.threadHasBeenCreated = %d", socketId, data->clients[socketId].workerData.threadHasBeenCreated);
if (data->clients[socketId].workerData.threadIsAlive == 1)
{
returnCode = pthread_cancel(data->clients[socketId].workerData.workerThread);
printf("\npasv pthread_cancel = %d", returnCode);
}
if (data->clients[socketId].workerData.threadHasBeenCreated == 1)
{
returnCode = pthread_join(data->clients[socketId].workerData.workerThread, &pReturn);
printf("\nPasv join ok %d", returnCode);
}
data->clients[socketId].workerData.passiveModeOn = 1;
data->clients[socketId].workerData.activeModeOn = 0;
returnCode = pthread_create(&data->clients[socketId].workerData.workerThread, NULL, connectionWorkerHandle, (void *) &data->clients[socketId].clientProgressiveNumber);
if (returnCode != 0)
{
printf("\nError in pthread_create %d", returnCode);
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
return FTP_COMMAND_PROCESSED;
}
int parseCommandPort(ftpDataType * data, int socketId)
{
int returnCode;
char *theIpAndPort;
int ipAddressBytes[4];
int portBytes[2];
theIpAndPort = getFtpCommandArg("PORT", data->clients[socketId].theCommandReceived, 0);
sscanf(theIpAndPort, "%d,%d,%d,%d,%d,%d", &ipAddressBytes[0], &ipAddressBytes[1], &ipAddressBytes[2], &ipAddressBytes[3], &portBytes[0], &portBytes[1]);
data->clients[socketId].workerData.connectionPort = (portBytes[0]*256)+portBytes[1];
returnCode = snprintf(data->clients[socketId].workerData.activeIpAddress, CLIENT_BUFFER_STRING_SIZE, "%d.%d.%d.%d", ipAddressBytes[0],ipAddressBytes[1],ipAddressBytes[2],ipAddressBytes[3]);
void *pReturn;
if (data->clients[socketId].workerData.threadIsAlive == 1)
{
returnCode = pthread_cancel(data->clients[socketId].workerData.workerThread);
}
if (data->clients[socketId].workerData.threadHasBeenCreated == 1)
{
returnCode = pthread_join(data->clients[socketId].workerData.workerThread, &pReturn);
}
data->clients[socketId].workerData.passiveModeOn = 0;
data->clients[socketId].workerData.activeModeOn = 1;
returnCode = pthread_create(&data->clients[socketId].workerData.workerThread, NULL, connectionWorkerHandle, (void *) &data->clients[socketId].clientProgressiveNumber);
if (returnCode != 0)
{
printf("\nError in pthread_create %d", returnCode);
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
return FTP_COMMAND_PROCESSED;
}
int parseCommandAbor(ftpDataType * data, int socketId)
{
/*
426 ABORT
226-Transfer aborted
226 3.406 seconds (measured here), 1.58 Mbytes per second
226 Since you see this ABOR must've succeeded
*/
int returnCode;
if (data->clients[socketId].workerData.threadIsAlive == 1)
{
if (data->clients[socketId].workerData.threadIsAlive == 1)
{
pthread_cancel(data->clients[socketId].workerData.workerThread);
}
returnCode = socketPrintf(data, socketId, "s", "426 ABORT\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
returnCode = socketPrintf(data, socketId, "s", "226 Transfer aborted\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
else
{
returnCode = socketPrintf(data, socketId, "s", "226 Since you see this ABOR must've succeeded\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
return FTP_COMMAND_PROCESSED;
}
int parseCommandList(ftpDataType * data, int socketId)
{
/*
-1 List one file per line
-A List all files except "." and ".."
-a List all files including those whose names start with "."
-C List entries by columns
-d List directory entries instead of directory contents
-F Append file type indicator (one of "*", "/", "=", "@" or "|") to names
-h Print file sizes in human-readable format (e.g. 1K, 234M, 2G)
-L List files pointed to by symlinks
-l Use a long listing format
-n List numeric UIDs/GIDs instead of user/group names
-R List subdirectories recursively
-r Sort filenames in reverse order
-S Sort by file size
-t Sort by modification time
*/
int isSafePath = 0;
char *theNameToList;
theNameToList = getFtpCommandArg("LIST", data->clients[socketId].theCommandReceived, 1);
getFtpCommandArgWithOptions("LIST", data->clients[socketId].theCommandReceived, &data->clients[socketId].workerData.ftpCommand);
if (data->clients[socketId].workerData.ftpCommand.commandArgs.text != NULL)
printf("\nLIST COMMAND ARG: %s", data->clients[socketId].workerData.ftpCommand.commandArgs.text);
if (data->clients[socketId].workerData.ftpCommand.commandOps.text != NULL)
printf("\nLIST COMMAND OPS: %s", data->clients[socketId].workerData.ftpCommand.commandOps.text);
printf("\ntheNameToList: %s", theNameToList);
cleanDynamicStringDataType(&data->clients[socketId].workerData.ftpCommand.commandArgs, 0);
cleanDynamicStringDataType(&data->clients[socketId].workerData.ftpCommand.commandOps, 0);
cleanDynamicStringDataType(&data->clients[socketId].listPath, 0);
if (strlen(theNameToList) > 0)
{
isSafePath = getSafePath(&data->clients[socketId].listPath, theNameToList, &data->clients[socketId].login);
}
if (isSafePath == 0)
{
cleanDynamicStringDataType(&data->clients[socketId].listPath, 0);
setDynamicStringDataType(&data->clients[socketId].listPath, data->clients[socketId].login.absolutePath.text, data->clients[socketId].login.absolutePath.textLen);
}
pthread_mutex_trylock(&data->clients[socketId].workerData.conditionMutex);
memset(data->clients[socketId].workerData.theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE);
strcpy(data->clients[socketId].workerData.theCommandReceived, data->clients[socketId].theCommandReceived);
data->clients[socketId].workerData.commandReceived = 1;
pthread_mutex_unlock(&data->clients[socketId].workerData.conditionMutex);
pthread_cond_signal(&data->clients[socketId].workerData.conditionVariable);
return FTP_COMMAND_PROCESSED;
}
int parseCommandNlst(ftpDataType * data, int socketId)
{
int isSafePath = 0;
char *theNameToNlist;
theNameToNlist = getFtpCommandArg("NLIST", data->clients[socketId].theCommandReceived, 1);
cleanDynamicStringDataType(&data->clients[socketId].nlistPath, 0);
printf("\nNLIST COMMAND ARG: %s", data->clients[socketId].workerData.ftpCommand.commandArgs.text);
printf("\nNLIST COMMAND OPS: %s", data->clients[socketId].workerData.ftpCommand.commandOps.text);
printf("\ntheNameToNlist: %s", theNameToNlist);
if (strlen(theNameToNlist) > 0)
{
isSafePath = getSafePath(&data->clients[socketId].nlistPath, theNameToNlist, &data->clients[socketId].login);
}
if (isSafePath == 0)
{
cleanDynamicStringDataType(&data->clients[socketId].nlistPath, 0);
setDynamicStringDataType(&data->clients[socketId].nlistPath, data->clients[socketId].login.absolutePath.text, data->clients[socketId].login.absolutePath.textLen);
}
pthread_mutex_trylock(&data->clients[socketId].workerData.conditionMutex);
memset(data->clients[socketId].workerData.theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE);
strcpy(data->clients[socketId].workerData.theCommandReceived, data->clients[socketId].theCommandReceived);
data->clients[socketId].workerData.commandReceived = 1;
pthread_mutex_unlock(&data->clients[socketId].workerData.conditionMutex);
pthread_cond_signal(&data->clients[socketId].workerData.conditionVariable);
return FTP_COMMAND_PROCESSED;
}
int parseCommandRetr(ftpDataType * data, int socketId)
{
int isSafePath = 0;
char *theNameToRetr;
theNameToRetr = getFtpCommandArg("RETR", data->clients[socketId].theCommandReceived, 0);
cleanDynamicStringDataType(&data->clients[socketId].fileToRetr, 0);
if (strlen(theNameToRetr) > 0)
{
isSafePath = getSafePath(&data->clients[socketId].fileToRetr, theNameToRetr, &data->clients[socketId].login);
}
if (isSafePath == 1 &&
FILE_IsFile(data->clients[socketId].fileToRetr.text) == 1)
{
pthread_mutex_trylock(&data->clients[socketId].workerData.conditionMutex);
memset(data->clients[socketId].workerData.theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE);
strcpy(data->clients[socketId].workerData.theCommandReceived, data->clients[socketId].theCommandReceived);
data->clients[socketId].workerData.commandReceived = 1;
pthread_mutex_unlock(&data->clients[socketId].workerData.conditionMutex);
pthread_cond_signal(&data->clients[socketId].workerData.conditionVariable);
return FTP_COMMAND_PROCESSED;
}
else
{
return FTP_COMMAND_NOT_RECONIZED;
}
return FTP_COMMAND_PROCESSED;
}
int parseCommandStor(ftpDataType * data, int socketId)
{
int isSafePath = 0;
char *theNameToStor;
theNameToStor = getFtpCommandArg("STOR", data->clients[socketId].theCommandReceived, 0);
cleanDynamicStringDataType(&data->clients[socketId].fileToStor, 0);
if (strlen(theNameToStor) > 0)
{
isSafePath = getSafePath(&data->clients[socketId].fileToStor, theNameToStor, &data->clients[socketId].login);
}
if (isSafePath == 1)
{
pthread_mutex_trylock(&data->clients[socketId].workerData.conditionMutex);
memset(data->clients[socketId].workerData.theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE);
strcpy(data->clients[socketId].workerData.theCommandReceived, data->clients[socketId].theCommandReceived);
data->clients[socketId].workerData.commandReceived = 1;
pthread_mutex_unlock(&data->clients[socketId].workerData.conditionMutex);
pthread_cond_signal(&data->clients[socketId].workerData.conditionVariable);
}
else
{
return FTP_COMMAND_NOT_RECONIZED;
}
return FTP_COMMAND_PROCESSED;
}
int parseCommandCwd(ftpDataType * data, int socketId)
{
dynamicStringDataType absolutePathPrevious, ftpPathPrevious, theSafePath;
int isSafePath;
int returnCode;
char *thePath;
cleanDynamicStringDataType(&absolutePathPrevious, 1);
cleanDynamicStringDataType(&ftpPathPrevious, 1);
cleanDynamicStringDataType(&theSafePath, 1);
thePath = getFtpCommandArg("CWD", data->clients[socketId].theCommandReceived, 0);
if (strlen(thePath) > 0)
{
isSafePath = getSafePath(&theSafePath, thePath, &data->clients[socketId].login);
}
if (isSafePath == 1)
{
//printf("\n The Path requested for CWD IS:%s", theSafePath.text);
setDynamicStringDataType(&absolutePathPrevious, data->clients[socketId].login.absolutePath.text, data->clients[socketId].login.absolutePath.textLen);
setDynamicStringDataType(&ftpPathPrevious, data->clients[socketId].login.ftpPath.text, data->clients[socketId].login.ftpPath.textLen);
if (theSafePath.text[0] != '/')
{
if (data->clients[socketId].login.absolutePath.text[data->clients[socketId].login.absolutePath.textLen-1] != '/')
appendToDynamicStringDataType(&data->clients[socketId].login.absolutePath, "/", 1);
if (data->clients[socketId].login.ftpPath.text[data->clients[socketId].login.ftpPath.textLen-1] != '/')
appendToDynamicStringDataType(&data->clients[socketId].login.ftpPath, "/", 1);
appendToDynamicStringDataType(&data->clients[socketId].login.absolutePath, theSafePath.text, theSafePath.textLen);
appendToDynamicStringDataType(&data->clients[socketId].login.ftpPath, theSafePath.text, theSafePath.textLen);
}
else if (theSafePath.text[0] == '/')
{
cleanDynamicStringDataType(&data->clients[socketId].login.ftpPath, 0);
cleanDynamicStringDataType(&data->clients[socketId].login.absolutePath, 0);
setDynamicStringDataType(&data->clients[socketId].login.ftpPath, theSafePath.text, theSafePath.textLen);
setDynamicStringDataType(&data->clients[socketId].login.absolutePath, data->clients[socketId].login.homePath.text, data->clients[socketId].login.homePath.textLen);
if (strlen(theSafePath.text)> 0)
{
char *theDirPointer = theSafePath.text;
if (data->clients[socketId].login.absolutePath.text[data->clients[socketId].login.absolutePath.textLen-1] == '/')
{
while(theDirPointer[0] == '/')
theDirPointer++;
}
if (strlen(theDirPointer) > 0)
appendToDynamicStringDataType(&data->clients[socketId].login.absolutePath, theDirPointer, strlen(theDirPointer));
}
}
if (FILE_IsDirectory(data->clients[socketId].login.absolutePath.text) == 1)
{
returnCode = socketPrintf(data, socketId, "sss", "250 OK. Current directory is ", data->clients[socketId].login.ftpPath.text, "\r\n");
}
else
{
setDynamicStringDataType(&data->clients[socketId].login.absolutePath, absolutePathPrevious.text, absolutePathPrevious.textLen);
setDynamicStringDataType(&data->clients[socketId].login.ftpPath, ftpPathPrevious.text, ftpPathPrevious.textLen);
returnCode = socketPrintf(data, socketId, "sss", "530 Can't change directory to ", data->clients[socketId].login.absolutePath.text, ": No such file or directory\r\n");
}
cleanDynamicStringDataType(&absolutePathPrevious, 0);
cleanDynamicStringDataType(&ftpPathPrevious, 0);
cleanDynamicStringDataType(&theSafePath, 0);
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
else
{
cleanDynamicStringDataType(&absolutePathPrevious, 0);
cleanDynamicStringDataType(&ftpPathPrevious, 0);
cleanDynamicStringDataType(&theSafePath, 0);
return FTP_COMMAND_NOT_RECONIZED;
}
}
int parseCommandRest(ftpDataType * data, int socketId)
{
int returnCode;
int i, theSizeIndex;
char theSize[FTP_COMMAND_ELABORATE_CHAR_BUFFER];
memset(theSize, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
theSizeIndex = 0;
for (i = strlen("REST")+1; i < data->clients[socketId].commandIndex; i++)
{
if (data->clients[socketId].theCommandReceived[i] == '\r' ||
data->clients[socketId].theCommandReceived[i] == '\0' ||
data->clients[socketId].theCommandReceived[i] == '\n')
{
break;
}
if (theSizeIndex < FTP_COMMAND_ELABORATE_CHAR_BUFFER &&
(data->clients[socketId].theCommandReceived[i] == '0' ||
data->clients[socketId].theCommandReceived[i] == '1' ||
data->clients[socketId].theCommandReceived[i] == '2' ||
data->clients[socketId].theCommandReceived[i] == '3' ||
data->clients[socketId].theCommandReceived[i] == '4' ||
data->clients[socketId].theCommandReceived[i] == '5' ||
data->clients[socketId].theCommandReceived[i] == '6' ||
data->clients[socketId].theCommandReceived[i] == '7' ||
data->clients[socketId].theCommandReceived[i] == '8' ||
data->clients[socketId].theCommandReceived[i] == '9' ))
{
theSize[theSizeIndex++] = data->clients[socketId].theCommandReceived[i];
}
}
data->clients[socketId].workerData.retrRestartAtByte = atoll(theSize);
returnCode = socketPrintf(data, socketId, "sss", "350 Restarting at ", theSize, "\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandMkd(ftpDataType * data, int socketId)
{
int returnCode;
int functionReturnCode = FTP_COMMAND_NOT_RECONIZED;
int isSafePath;
char *theDirectoryFilename;
dynamicStringDataType mkdFileName;
theDirectoryFilename = getFtpCommandArg("MKD", data->clients[socketId].theCommandReceived, 0);
cleanDynamicStringDataType(&mkdFileName, 1);
isSafePath = getSafePath(&mkdFileName, theDirectoryFilename, &data->clients[socketId].login);
if (isSafePath == 1)
{
int returnStatus;
returnStatus = mkdir(mkdFileName.text, S_IRWXU | S_IRWXG | S_IRWXO);
if (returnStatus == -1)
{
returnCode = socketPrintf(data, socketId, "sss", "550 error while creating directory ", theDirectoryFilename, "\r\n");
if (returnCode <= 0)
{
functionReturnCode = FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
else
{
functionReturnCode = FTP_COMMAND_PROCESSED;
}
}
else
{
if (data->clients[socketId].login.ownerShip.ownerShipSet == 1)
{
returnStatus = FILE_doChownFromUidGid(mkdFileName.text, data->clients[socketId].login.ownerShip.uid, data->clients[socketId].login.ownerShip.gid);
}
returnCode = socketPrintf(data, socketId, "sss", "257 \"", theDirectoryFilename, "\" : The directory was successfully created\r\n");
if (returnCode <= 0)
{
functionReturnCode = FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
else
{
functionReturnCode = FTP_COMMAND_PROCESSED;
}
}
}
else
{
cleanDynamicStringDataType(&mkdFileName, 0);
functionReturnCode = FTP_COMMAND_NOT_RECONIZED;
}
cleanDynamicStringDataType(&mkdFileName, 0);
return functionReturnCode;
}
int parseCommandOpts(ftpDataType * data, int socketId)
{
int returnCode;
returnCode = socketPrintf(data, socketId, "s", "200 OK\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandDele(ftpDataType * data, int socketId)
{
int functionReturnCode = 0;
int returnCode;
int isSafePath;
int returnStatus = 0;
char *theFileToDelete;
dynamicStringDataType deleFileName;
theFileToDelete = getFtpCommandArg("DELE", data->clients[socketId].theCommandReceived, 0);
cleanDynamicStringDataType(&deleFileName, 1);
isSafePath = getSafePath(&deleFileName, theFileToDelete, &data->clients[socketId].login);
if (isSafePath == 1)
{
//printf("\nThe file to delete is: %s", deleFileName.text);
if (FILE_IsFile(deleFileName.text) == 1)
{
returnStatus = remove(deleFileName.text);
if (returnStatus == -1)
{
returnCode = socketPrintf(data, socketId, "sss", "550 Could not delete the file: ", theFileToDelete, " some errors occurred\r\n");
}
else
{
returnCode = socketPrintf(data, socketId, "sss", "250 Deleted ", theFileToDelete, "\r\n");
}
functionReturnCode = FTP_COMMAND_PROCESSED;
if (returnCode <= 0)
functionReturnCode = FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
else
{
returnCode = socketPrintf(data, socketId, "s", "550 Could not delete the file: No such file or file is a directory\r\n");
functionReturnCode = FTP_COMMAND_PROCESSED;
if (returnCode <= 0)
functionReturnCode = FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
}
else
{
functionReturnCode = FTP_COMMAND_NOT_RECONIZED;
}
cleanDynamicStringDataType(&deleFileName, 0);
return functionReturnCode;
}
int parseCommandNoop(ftpDataType * data, int socketId)
{
int returnCode;
returnCode = socketPrintf(data, socketId, "s", "200 Zzz...\r\n");
if (returnCode <= 0) {
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
}
return FTP_COMMAND_PROCESSED;
}
int notLoggedInMessage(ftpDataType * data, int socketId)
{
int returnCode;
returnCode = socketPrintf(data, socketId, "s", "530 You aren't logged in\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
return FTP_COMMAND_PROCESSED;
}
int parseCommandQuit(ftpDataType * data, int socketId)
{
int returnCode;
returnCode = socketPrintf(data, socketId, "s", "221 Logout.\r\n");
if (returnCode <= 0)
return FTP_COMMAND_PROCESSED_WRITE_ERROR;
data->clients[socketId].closeTheClient = 1;
printf("\n Closing the client quit received");
return FTP_COMMAND_PROCESSED;
}
int parseCommandRmd(ftpDataType * data, int socketId)
{
int functionReturnCode = 0;
int returnCode;