/* * 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 #include #include #include #include #include #include #include #include #include #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 "library/dynamicMemory.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), &data->clients[socketId].memoryTable); 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), &data->clients[socketId].memoryTable); setDynamicStringDataType(&data->clients[socketId].login.absolutePath, ((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->homePath, strlen(((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->homePath), &data->clients[socketId].memoryTable); setDynamicStringDataType(&data->clients[socketId].login.homePath, ((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->homePath, strlen(((usersParameters_DataType *) data->ftpParameters.usersVector.Data[searchUserNameIndex])->homePath), &data->clients[socketId].memoryTable); setDynamicStringDataType(&data->clients[socketId].login.ftpPath, "/", strlen("/"), &data->clients[socketId].memoryTable); 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, &data->clients[socketId].workerData.memoryTable); 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, &data->clients[socketId].workerData.memoryTable); cleanDynamicStringDataType(&data->clients[socketId].workerData.ftpCommand.commandOps, 0, &data->clients[socketId].workerData.memoryTable); cleanDynamicStringDataType(&data->clients[socketId].listPath, 0, &data->clients[socketId].memoryTable); if (strlen(theNameToList) > 0) { isSafePath = getSafePath(&data->clients[socketId].listPath, theNameToList, &data->clients[socketId].login, &data->clients[socketId].memoryTable); } if (isSafePath == 0) { cleanDynamicStringDataType(&data->clients[socketId].listPath, 0, &data->clients[socketId].memoryTable); setDynamicStringDataType(&data->clients[socketId].listPath, data->clients[socketId].login.absolutePath.text, data->clients[socketId].login.absolutePath.textLen, &data->clients[socketId].memoryTable); } 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, &data->clients[socketId].memoryTable); 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, &data->clients[socketId].memoryTable); } if (isSafePath == 0) { cleanDynamicStringDataType(&data->clients[socketId].nlistPath, 0, &data->clients[socketId].memoryTable); setDynamicStringDataType(&data->clients[socketId].nlistPath, data->clients[socketId].login.absolutePath.text, data->clients[socketId].login.absolutePath.textLen, &data->clients[socketId].memoryTable); } 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, &data->clients[socketId].memoryTable); if (strlen(theNameToRetr) > 0) { isSafePath = getSafePath(&data->clients[socketId].fileToRetr, theNameToRetr, &data->clients[socketId].login, &data->clients[socketId].memoryTable); } 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, &data->clients[socketId].memoryTable); if (strlen(theNameToStor) > 0) { isSafePath = getSafePath(&data->clients[socketId].fileToStor, theNameToStor, &data->clients[socketId].login, &data->clients[socketId].memoryTable); } 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, &data->clients[socketId].memoryTable); cleanDynamicStringDataType(&ftpPathPrevious, 1, &data->clients[socketId].memoryTable); cleanDynamicStringDataType(&theSafePath, 1, &data->clients[socketId].memoryTable); thePath = getFtpCommandArg("CWD", data->clients[socketId].theCommandReceived, 0); if (strlen(thePath) > 0) { //printf("Memory data address 1st call : %lld", &data->clients[socketId].memoryTable); isSafePath = getSafePath(&theSafePath, thePath, &data->clients[socketId].login, &data->clients[socketId].memoryTable); } 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, &data->clients[socketId].memoryTable); setDynamicStringDataType(&ftpPathPrevious, data->clients[socketId].login.ftpPath.text, data->clients[socketId].login.ftpPath.textLen, &data->clients[socketId].memoryTable); 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, &data->clients[socketId].memoryTable); if (data->clients[socketId].login.ftpPath.text[data->clients[socketId].login.ftpPath.textLen-1] != '/') appendToDynamicStringDataType(&data->clients[socketId].login.ftpPath, "/", 1, &data->clients[socketId].memoryTable); appendToDynamicStringDataType(&data->clients[socketId].login.absolutePath, theSafePath.text, theSafePath.textLen, &data->clients[socketId].memoryTable); appendToDynamicStringDataType(&data->clients[socketId].login.ftpPath, theSafePath.text, theSafePath.textLen, &data->clients[socketId].memoryTable); } else if (theSafePath.text[0] == '/') { cleanDynamicStringDataType(&data->clients[socketId].login.ftpPath, 0, &data->clients[socketId].memoryTable); cleanDynamicStringDataType(&data->clients[socketId].login.absolutePath, 0, &data->clients[socketId].memoryTable); setDynamicStringDataType(&data->clients[socketId].login.ftpPath, theSafePath.text, theSafePath.textLen, &data->clients[socketId].memoryTable); setDynamicStringDataType(&data->clients[socketId].login.absolutePath, data->clients[socketId].login.homePath.text, data->clients[socketId].login.homePath.textLen, &data->clients[socketId].memoryTable); 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), &data->clients[socketId].memoryTable); } } 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, &data->clients[socketId].memoryTable); setDynamicStringDataType(&data->clients[socketId].login.ftpPath, ftpPathPrevious.text, ftpPathPrevious.textLen, &data->clients[socketId].memoryTable); 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, &data->clients[socketId].memoryTable); cleanDynamicStringDataType(&ftpPathPrevious, 0, &data->clients[socketId].memoryTable); cleanDynamicStringDataType(&theSafePath, 0, &data->clients[socketId].memoryTable); if (returnCode <= 0) return FTP_COMMAND_PROCESSED_WRITE_ERROR; return FTP_COMMAND_PROCESSED; } else { cleanDynamicStringDataType(&absolutePathPrevious, 0, &data->clients[socketId].memoryTable); cleanDynamicStringDataType(&ftpPathPrevious, 0, &data->clients[socketId].memoryTable); cleanDynamicStringDataType(&theSafePath, 0, &data->clients[socketId].memoryTable); 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, &data->clients[socketId].memoryTable); isSafePath = getSafePath(&mkdFileName, theDirectoryFilename, &data->clients[socketId].login, &data->clients[socketId].memoryTable); 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, &data->clients[socketId].memoryTable); functionReturnCode = FTP_COMMAND_NOT_RECONIZED; } cleanDynamicStringDataType(&mkdFileName, 0, &data->clients[socketId].memoryTable); 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, &data->clients[socketId].memoryTable); isSafePath = getSafePath(&deleFileName, theFileToDelete, &data->clients[socketId].login, &data->clients[socketId].memoryTable); 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, &data->clients[socketId].memoryTable); 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; int isSafePath; int returnStatus = 0; char *theDirectoryFilename; dynamicStringDataType rmdFileName; theDirectoryFilename = getFtpCommandArg("RMD", data->clients[socketId].theCommandReceived, 0); cleanDynamicStringDataType(&rmdFileName, 1, &data->clients[socketId].memoryTable); isSafePath = getSafePath(&rmdFileName, theDirectoryFilename, &data->clients[socketId].login, &data->clients[socketId].memoryTable); if (isSafePath == 1) { if (FILE_IsDirectory(rmdFileName.text) == 1) { returnStatus = rmdir(rmdFileName.text); if (returnStatus == -1) { returnCode = socketPrintf(data, socketId, "s", "550 Could not remove the directory, some errors occurred.\r\n"); } else { returnCode = socketPrintf(data, socketId, "s", "250 The directory was successfully removed\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 directory:No such directory\r\n"); functionReturnCode = FTP_COMMAND_PROCESSED; if (returnCode <= 0) functionReturnCode = FTP_COMMAND_PROCESSED_WRITE_ERROR; } } else { functionReturnCode = FTP_COMMAND_NOT_RECONIZED; } cleanDynamicStringDataType(&rmdFileName, 0, &data->clients[socketId].memoryTable); return functionReturnCode; } int parseCommandSize(ftpDataType * data, int socketId) { int returnCode; int isSafePath; long long int theSize; char *theFileName; dynamicStringDataType getSizeFromFileName; theFileName = getFtpCommandArg("SIZE", data->clients[socketId].theCommandReceived, 0); cleanDynamicStringDataType(&getSizeFromFileName, 1, &data->clients[socketId].memoryTable); isSafePath = getSafePath(&getSizeFromFileName, theFileName, &data->clients[socketId].login, &data->clients[socketId].memoryTable); if (isSafePath == 1) { if (FILE_IsFile(getSizeFromFileName.text)== 1) { theSize = FILE_GetFileSizeFromPath(getSizeFromFileName.text); returnCode = socketPrintf(data, socketId, "sls", "213 ", theSize, "\r\n"); } else { returnCode = socketPrintf(data, socketId, "s", "550 Can't check for file existence\r\n"); } } else { returnCode = socketPrintf(data, socketId, "s", "550 Can't check for file existence\r\n"); } cleanDynamicStringDataType(&getSizeFromFileName, 0, &data->clients[socketId].memoryTable); if (returnCode <= 0) return FTP_COMMAND_PROCESSED_WRITE_ERROR; return FTP_COMMAND_PROCESSED; } int parseCommandRnfr(ftpDataType * data, int socketId) { int returnCode; int isSafePath; char *theRnfrFileName; theRnfrFileName = getFtpCommandArg("RNFR", data->clients[socketId].theCommandReceived, 0); cleanDynamicStringDataType(&data->clients[socketId].renameFromFile, 0, &data->clients[socketId].memoryTable); isSafePath = getSafePath(&data->clients[socketId].renameFromFile, theRnfrFileName, &data->clients[socketId].login, &data->clients[socketId].memoryTable); if (isSafePath == 1&& (FILE_IsFile(data->clients[socketId].renameFromFile.text) == 1 || FILE_IsDirectory(data->clients[socketId].renameFromFile.text) == 1)) { if (FILE_IsFile(data->clients[socketId].renameFromFile.text) == 1 || FILE_IsDirectory(data->clients[socketId].renameFromFile.text) == 1) { returnCode = socketPrintf(data, socketId, "s", "350 RNFR accepted - file exists, ready for destination\r\n"); } else { returnCode = socketPrintf(data, socketId, "s", "550 Sorry, but that file doesn't exist\r\n"); } } else { returnCode = socketPrintf(data, socketId, "s", "550 Sorry, but that file doesn't exist\r\n"); } if (returnCode <= 0) return FTP_COMMAND_PROCESSED_WRITE_ERROR; return FTP_COMMAND_PROCESSED; } int parseCommandRnto(ftpDataType * data, int socketId) { int returnCode = 0; int isSafePath; char *theRntoFileName; theRntoFileName = getFtpCommandArg("RNTO", data->clients[socketId].theCommandReceived, 0); cleanDynamicStringDataType(&data->clients[socketId].renameToFile, 0, &data->clients[socketId].memoryTable); isSafePath = getSafePath(&data->clients[socketId].renameToFile, theRntoFileName, &data->clients[socketId].login, &data->clients[socketId].memoryTable); if (isSafePath == 1 && data->clients[socketId].renameFromFile.textLen > 0) { if (FILE_IsFile(data->clients[socketId].renameFromFile.text) == 1 || FILE_IsDirectory(data->clients[socketId].renameFromFile.text) == 1) { returnCode = rename (data->clients[socketId].renameFromFile.text, data->clients[socketId].renameToFile.text); if (returnCode == 0) { returnCode = socketPrintf(data, socketId, "s", "250 File successfully renamed or moved\r\n"); } else { returnCode = socketPrintf(data, socketId, "s", "503 Error Renaming the file\r\n"); } } else { returnCode = socketPrintf(data, socketId, "s", "503 Need RNFR before RNTO\r\n"); } } else { returnCode = socketPrintf(data, socketId, "s", "503 Error Renaming the file\r\n"); } if (returnCode <= 0) { return FTP_COMMAND_PROCESSED_WRITE_ERROR; } else { return FTP_COMMAND_PROCESSED; } } int parseCommandCdup(ftpDataType * data, int socketId) { int returnCode; FILE_DirectoryToParent(&data->clients[socketId].login.absolutePath.text); FILE_DirectoryToParent(&data->clients[socketId].login.ftpPath.text); data->clients[socketId].login.absolutePath.textLen = strlen(data->clients[socketId].login.absolutePath.text); data->clients[socketId].login.ftpPath.textLen = strlen(data->clients[socketId].login.ftpPath.text); if(strncmp(data->clients[socketId].login.absolutePath.text, data->clients[socketId].login.homePath.text, data->clients[socketId].login.homePath.textLen) != 0) { setDynamicStringDataType(&data->clients[socketId].login.absolutePath, data->clients[socketId].login.homePath.text, data->clients[socketId].login.homePath.textLen, &data->clients[socketId].memoryTable); } returnCode = socketPrintf(data, socketId, "sss", "250 OK. Current directory is ", data->clients[socketId].login.ftpPath.text, "\r\n"); if (returnCode <= 0) return FTP_COMMAND_PROCESSED_WRITE_ERROR; return FTP_COMMAND_PROCESSED; } long long int writeRetrFile(ftpDataType * data, int theSocketId, long long int startFrom, FILE *retrFP) { long long int readen = 0; long long int toReturn = 0, writtenSize = 0; long long int currentPosition = 0; long long int theFileSize; char buffer[FTP_COMMAND_ELABORATE_CHAR_BUFFER]; #ifdef LARGE_FILE_SUPPORT_ENABLED //#warning LARGE FILE SUPPORT IS ENABLED! retrFP = fopen64(data->clients[theSocketId].fileToRetr.text, "rb"); #endif #ifndef LARGE_FILE_SUPPORT_ENABLED #warning LARGE FILE SUPPORT IS NOT ENABLED! retrFP = fopen(data->clients[theSocketId].fileToRetr.text, "rb"); #endif if (retrFP == NULL) { return -1; } theFileSize = FILE_GetFileSize(retrFP); if (startFrom > 0) { #ifdef LARGE_FILE_SUPPORT_ENABLED //#warning LARGE FILE SUPPORT IS ENABLED! currentPosition = (long long int) lseek64(fileno(retrFP), startFrom, SEEK_SET); #endif #ifndef LARGE_FILE_SUPPORT_ENABLED #warning LARGE FILE SUPPORT IS NOT ENABLED! currentPosition = (long long int) lseek(fileno(retrFP), startFrom, SEEK_SET); #endif if (currentPosition == -1) { fclose(retrFP); retrFP = NULL; return toReturn; } } while ((readen = (long long int) fread(buffer, sizeof(char), FTP_COMMAND_ELABORATE_CHAR_BUFFER, retrFP)) > 0) { if (data->clients[theSocketId].dataChannelIsTls != 1) { writtenSize = write(data->clients[theSocketId].workerData.socketConnection, buffer, readen); } else { #ifdef OPENSSL_ENABLED if (data->clients[theSocketId].workerData.passiveModeOn == 1) writtenSize = SSL_write(data->clients[theSocketId].workerData.serverSsl, buffer, readen); else if (data->clients[theSocketId].workerData.activeModeOn == 1) writtenSize = SSL_write(data->clients[theSocketId].workerData.clientSsl, buffer, readen); #endif } if (writtenSize <= 0) { fclose(retrFP); retrFP = NULL; return -1; } else { toReturn = toReturn + writtenSize; } } fclose(retrFP); retrFP = NULL; return toReturn; } char *getFtpCommandArg(char * theCommand, char *theCommandString, int skipArgs) { char *toReturn = theCommandString + strlen(theCommand); /* Pass spaces */ while (toReturn[0] == ' ') { toReturn += 1; } /* Skip eventual secondary arguments */ if(skipArgs == 1) { if (toReturn[0] == '-') { while (toReturn[0] != ' ' && toReturn[0] != '\r' && toReturn[0] != '\n' && toReturn[0] != 0) { toReturn += 1; } } /* Pass spaces */ while (toReturn[0] == ' ') { toReturn += 1; } } return toReturn; } int getFtpCommandArgWithOptions(char * theCommand, char *theCommandString, ftpCommandDataType *ftpCommand, DYNMEM_MemoryTable_DataType **memoryTable) { #define CASE_ARG_MAIN 0 #define CASE_ARG_SECONDARY 1 int i = 0; int isSecondArg = 0; char argMain[FTP_COMMAND_ELABORATE_CHAR_BUFFER]; char argSecondary[FTP_COMMAND_ELABORATE_CHAR_BUFFER]; memset (argMain, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER); memset (argSecondary, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER); int argMainIndex = 0; int argSecondaryIndex = 0; char *theCommandPointer = theCommandString; theCommandPointer += strlen(theCommand); /*Remove spaces*/ while (theCommandPointer[0] == ' ') { theCommandPointer += 1; } if (theCommandPointer[i] == '-') { isSecondArg = 1; theCommandPointer++; } while (theCommandPointer[i] != '\r' && theCommandPointer[i] != '\n' && theCommandPointer[i] != 0) { switch(isSecondArg) { case CASE_ARG_MAIN: { if (argMainIndex < FTP_COMMAND_ELABORATE_CHAR_BUFFER) argMain[argMainIndex++] = theCommandPointer[i]; i++; } break; case CASE_ARG_SECONDARY: { if (theCommandPointer[i] != ' ') { if (argSecondaryIndex < FTP_COMMAND_ELABORATE_CHAR_BUFFER) argSecondary[argSecondaryIndex++] = theCommandPointer[i]; i++; } else { isSecondArg = 0; while (theCommandPointer[0] == ' ') { theCommandPointer += 1; } } } break; } } if (argMainIndex > 0) setDynamicStringDataType(&ftpCommand->commandArgs, argMain, argMainIndex, &*memoryTable); if (argSecondaryIndex > 0) setDynamicStringDataType(&ftpCommand->commandOps, argSecondary, argSecondaryIndex, &*memoryTable); return 1; } int setPermissions(char * permissionsCommand, char * basePath, ownerShip_DataType ownerShip) { #define MAXIMUM_FILENAME_LEN 4096 #define STATUS_INCREASE 0 #define STATUS_PERMISSIONS 1 #define STATUS_LOCAL_PATH 2 int permissionsCommandCursor = 0; int returnCode = 0; int status = STATUS_INCREASE; char thePermissionString[MAXIMUM_FILENAME_LEN]; char theLocalPath[MAXIMUM_FILENAME_LEN]; char theFinalFilename[MAXIMUM_FILENAME_LEN]; int returnCodeSetPermissions, returnCodeSetOwnership; memset(theLocalPath, 0, MAXIMUM_FILENAME_LEN); memset(thePermissionString, 0, MAXIMUM_FILENAME_LEN); memset(theFinalFilename, 0, MAXIMUM_FILENAME_LEN); int thePermissionStringCursor = 0, theLocalPathCursor = 0; while (permissionsCommand[permissionsCommandCursor] != '\r' && permissionsCommand[permissionsCommandCursor] != '\n' && permissionsCommand[permissionsCommandCursor] != '\0') { switch (status) { case STATUS_INCREASE: if (permissionsCommandCursor == strlen("chmod")) { status = STATUS_PERMISSIONS; } break; case STATUS_PERMISSIONS: if (permissionsCommand[permissionsCommandCursor] == ' ') { status = STATUS_LOCAL_PATH; break; } if (thePermissionStringCursor < MAXIMUM_FILENAME_LEN ) thePermissionString[thePermissionStringCursor++] = permissionsCommand[permissionsCommandCursor]; else return FTP_CHMODE_COMMAND_RETURN_NAME_TOO_LONG; break; case STATUS_LOCAL_PATH: if (theLocalPathCursor < MAXIMUM_FILENAME_LEN) theLocalPath[theLocalPathCursor++] = permissionsCommand[permissionsCommandCursor]; else return FTP_CHMODE_COMMAND_RETURN_NAME_TOO_LONG; break; } permissionsCommandCursor++; } if ((strlen(basePath) + strlen(theLocalPath) + 2) >= MAXIMUM_FILENAME_LEN) { return FTP_CHMODE_COMMAND_RETURN_NAME_TOO_LONG; } if (basePath[strlen(basePath)-1] != '/') { returnCode = snprintf(theFinalFilename, MAXIMUM_FILENAME_LEN, "%s/%s", basePath, theLocalPath); if (returnCode >= MAXIMUM_FILENAME_LEN) return FTP_CHMODE_COMMAND_RETURN_NAME_TOO_LONG; } else { returnCode = snprintf(theFinalFilename, MAXIMUM_FILENAME_LEN, "%s%s", basePath, theLocalPath); if (returnCode >= MAXIMUM_FILENAME_LEN) return FTP_CHMODE_COMMAND_RETURN_NAME_TOO_LONG; } if (FILE_IsFile(theFinalFilename) != 1 && FILE_IsDirectory(theFinalFilename) != 1) { return FTP_CHMODE_COMMAND_RETURN_CODE_NO_FILE; } if (ownerShip.ownerShipSet == 1) { returnCodeSetOwnership = FILE_doChownFromUidGid(theFinalFilename, ownerShip.uid, ownerShip.gid); } returnCode = strtol(thePermissionString, 0, 8); if ((returnCodeSetPermissions = chmod (theFinalFilename, returnCode)) < 0) { printf("\n---> ERROR WHILE SETTING FILE PERMISSION"); } if (returnCodeSetOwnership != 1 || returnCodeSetPermissions == -1) { return FTP_CHMODE_COMMAND_RETURN_CODE_NO_PERMISSIONS; } return FTP_CHMODE_COMMAND_RETURN_CODE_OK; }