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ftpServer.c
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ftpServer.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 <arpa/inet.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <netdb.h>
#include <errno.h>
/* FTP LIBS */
#include "library/fileManagement.h"
#include "library/logFunctions.h"
#include "library/configRead.h"
#include "library/signals.h"
#include "library/openSsl.h"
#include "library/connection.h"
#include "library/dynamicMemory.h"
#include "library/errorHandling.h"
#include "library/daemon.h"
#include "library/log.h"
#include "ftpServer.h"
#include "ftpData.h"
#include "ftpCommandsElaborate.h"
#include "debugHelper.h"
ftpDataType ftpData;
pthread_t watchDogThread;
static int processCommand(int processingElement);
void workerCleanup(void *socketId)
{
int theSocketId = *(int *)socketId;
int returnCode = 0;
//my_printf("\nWorker %d cleanup", theSocketId);
#ifdef OPENSSL_ENABLED
int error;
error = fcntl(ftpData.clients[theSocketId].workerData.socketConnection, F_SETFL, O_NONBLOCK);
if (ftpData.clients[theSocketId].dataChannelIsTls == 1)
{
if(ftpData.clients[theSocketId].workerData.passiveModeOn == 1)
{
//my_printf("\nSSL worker Shutdown 1");
returnCode = SSL_shutdown(ftpData.clients[theSocketId].workerData.serverSsl);
//my_printf("\nnSSL worker Shutdown 1 return code : %d", returnCode);
if (!returnCode)
{
shutdown(ftpData.clients[theSocketId].workerData.socketConnection, SHUT_RDWR);
shutdown(ftpData.clients[theSocketId].workerData.passiveListeningSocket, SHUT_RDWR);
//my_printf("\nSSL worker Shutdown 2");
returnCode = SSL_shutdown(ftpData.clients[theSocketId].workerData.serverSsl);
//my_printf("\nnSSL worker Shutdown 2 return code : %d", returnCode);
}
}
if(ftpData.clients[theSocketId].workerData.activeModeOn == 1)
{
returnCode = SSL_shutdown(ftpData.clients[theSocketId].workerData.clientSsl);
if (!returnCode)
{
shutdown(ftpData.clients[theSocketId].workerData.socketConnection, SHUT_RDWR);
shutdown(ftpData.clients[theSocketId].workerData.passiveListeningSocket, SHUT_RDWR);
returnCode = SSL_shutdown(ftpData.clients[theSocketId].workerData.clientSsl);
}
}
}
#endif
shutdown(ftpData.clients[theSocketId].workerData.socketConnection, SHUT_RDWR);
shutdown(ftpData.clients[theSocketId].workerData.passiveListeningSocket, SHUT_RDWR);
returnCode = close(ftpData.clients[theSocketId].workerData.socketConnection);
returnCode = close(ftpData.clients[theSocketId].workerData.passiveListeningSocket);
resetWorkerData(&ftpData, theSocketId, 0);
// my_printf("\nWorker cleaned!");
//my_printf("\nWorker memory table :%lld", ftpData.clients[theSocketId].workerData.memoryTable);
if (ftpData.clients[theSocketId].workerData.memoryTable != NULL)
;//my_printf("\nMemory table element label: %s", ftpData.clients[theSocketId].workerData.memoryTable->theName);
else
;//my_printf("\nNo data to print");
}
void *connectionWorkerHandle(void * socketId)
{
int theSocketId = *(int *)socketId;
// Enable cancellation for this thread
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
pthread_cleanup_push(workerCleanup, (void *) &theSocketId);
ftpData.clients[theSocketId].workerData.threadIsAlive = 1;
ftpData.clients[theSocketId].workerData.threadHasBeenCreated = 1;
int returnCode;
my_printf("\n ----------------- WORKER CREATED --------------!");
//Passive data connection mode
if (ftpData.clients[theSocketId].workerData.passiveModeOn == 1)
{
int tries = 30;
while (tries > 0)
{
setRandomicPort(&ftpData, theSocketId);
ftpData.clients[theSocketId].workerData.passiveListeningSocket = createPassiveSocket(ftpData.clients[theSocketId].workerData.connectionPort);
if (ftpData.clients[theSocketId].workerData.passiveListeningSocket != -1)
{
break;
}
tries--;
}
if (ftpData.clients[theSocketId].workerData.passiveListeningSocket == -1)
{
ftpData.clients[theSocketId].closeTheClient = 1;
my_printf("\n Closing the client 1");
pthread_exit(NULL);
}
if (ftpData.clients[theSocketId].workerData.socketIsConnected == 0)
{
if (ftpData.clients[theSocketId].workerData.passiveModeOn == 1 && ftpData.clients[theSocketId].workerData.extendedPassiveModeOn == 0)
{
if(strnlen(ftpData.ftpParameters.natIpAddress, STRING_SZ_SMALL) > 0)
{
my_printf("\n Using nat ip: %s", ftpData.ftpParameters.natIpAddress);
returnCode = socketPrintf(&ftpData, theSocketId, "sssdsds", "227 Entering Passive Mode (", ftpData.ftpParameters.natIpAddress, ",", (ftpData.clients[theSocketId].workerData.connectionPort / 256), ",", (ftpData.clients[theSocketId].workerData.connectionPort % 256), ")\r\n");
}
else
{
my_printf("\n Using server ip: %s", ftpData.ftpParameters.natIpAddress);
returnCode = socketPrintf(&ftpData, theSocketId, "sdsdsdsdsdsds", "227 Entering Passive Mode (", ftpData.clients[theSocketId].serverIpV4AddressInteger[0], ",", ftpData.clients[theSocketId].serverIpV4AddressInteger[1], ",", ftpData.clients[theSocketId].serverIpV4AddressInteger[2], ",", ftpData.clients[theSocketId].serverIpV4AddressInteger[3], ",", (ftpData.clients[theSocketId].workerData.connectionPort / 256), ",", (ftpData.clients[theSocketId].workerData.connectionPort % 256), ")\r\n");
}
}
else if (ftpData.clients[theSocketId].workerData.passiveModeOn == 1 && ftpData.clients[theSocketId].workerData.extendedPassiveModeOn == 1)
{
returnCode = socketPrintf(&ftpData, theSocketId, "sds", "229 Entering Extended Passive Mode (|||", ftpData.clients[theSocketId].workerData.connectionPort, "|)\r\n");
}
else
{
returnCode = -1;
my_printfError("\nUnknown passive state, should be PASV or EPSV");
perror("Unknown passive state, should be PASV or EPSV");
}
ftpData.clients[theSocketId].workerData.socketIsReadyForConnection = 1;
if (returnCode <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 2");
pthread_exit(NULL);
}
//Wait for sockets
if ((ftpData.clients[theSocketId].workerData.socketConnection = accept(ftpData.clients[theSocketId].workerData.passiveListeningSocket, 0, 0))!=-1)
{
ftpData.clients[theSocketId].workerData.socketIsConnected = 1;
#ifdef OPENSSL_ENABLED
if (ftpData.clients[theSocketId].dataChannelIsTls == 1)
{
returnCode = SSL_set_fd(ftpData.clients[theSocketId].workerData.serverSsl, ftpData.clients[theSocketId].workerData.socketConnection);
if (returnCode == 0)
{
my_printf("\nSSL ERRORS ON WORKER SSL_set_fd");
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
}
returnCode = SSL_accept(ftpData.clients[theSocketId].workerData.serverSsl);
if (returnCode <= 0)
{
my_printf("\nSSL ERRORS ON WORKER");
ERR_print_errors_fp(stderr);
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
}
else
{
//my_printf("\nSSL ACCEPTED ON WORKER");
}
}
#endif
}
else
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 3");
pthread_exit(NULL);
}
}
else
my_printf("\n Socket already connected");
}
else if (ftpData.clients[theSocketId].workerData.activeModeOn == 1)
{
my_printf("\n ----------------- CREATING ACTIVE SOCKET --------------!");
if (ftpData.clients[theSocketId].workerData.addressType == 1)
ftpData.clients[theSocketId].workerData.socketConnection = createActiveSocket(ftpData.clients[theSocketId].workerData.connectionPort, ftpData.clients[theSocketId].workerData.activeIpAddress);
#ifdef IPV6_ENABLED
else if (ftpData.clients[theSocketId].workerData.addressType == 2)
ftpData.clients[theSocketId].workerData.socketConnection = createActiveSocketV6(ftpData.clients[theSocketId].workerData.connectionPort, ftpData.clients[theSocketId].workerData.activeIpAddress);
#endif
#ifdef OPENSSL_ENABLED
if (ftpData.clients[theSocketId].dataChannelIsTls == 1)
{
returnCode = SSL_set_fd(ftpData.clients[theSocketId].workerData.clientSsl, ftpData.clients[theSocketId].workerData.socketConnection);
if (returnCode == 0)
{
my_printf("\nSSL ERRORS ON WORKER SSL_set_fd");
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
}
//SSL_set_connect_state(ftpData.clients[theSocketId].workerData.clientSsl);
returnCode = SSL_connect(ftpData.clients[theSocketId].workerData.clientSsl);
if (returnCode <= 0)
{
my_printf("\nSSL ERRORS ON WORKER %d error code: %d", returnCode, SSL_get_error(ftpData.clients[theSocketId].workerData.clientSsl, returnCode));
ERR_print_errors_fp(stderr);
}
else
{
//my_printf("\nSSL ACCEPTED ON WORKER");
}
}
#endif
if (ftpData.clients[theSocketId].workerData.socketConnection < 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 4");
pthread_exit(NULL);
}
returnCode = socketPrintf(&ftpData, theSocketId, "s", "200 connection accepted\r\n");
ftpData.clients[theSocketId].workerData.socketIsReadyForConnection = 1;
if (returnCode <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 5");
pthread_exit(NULL);
}
ftpData.clients[theSocketId].workerData.socketIsConnected = 1;
}
//my_printf("\nftpData.clients[theSocketId].workerData.socketIsConnected = %d", ftpData.clients[theSocketId].workerData.socketIsConnected);
//Endless loop ftp process
while (1)
{
if (ftpData.clients[theSocketId].workerData.socketIsConnected > 0)
{
my_printf("\nWorker %d is waiting for commands!", theSocketId);
//Conditional lock on tconditionVariablehread actions
pthread_mutex_lock(&ftpData.clients[theSocketId].conditionMutex);
while (ftpData.clients[theSocketId].workerData.commandReceived == 0)
{
pthread_cond_wait(&ftpData.clients[theSocketId].conditionVariable, &ftpData.clients[theSocketId].conditionMutex);
}
pthread_mutex_unlock(&ftpData.clients[theSocketId].conditionMutex);
if (ftpData.clients[theSocketId].workerData.commandReceived == 1 &&
(compareStringCaseInsensitive(ftpData.clients[theSocketId].workerData.theCommandReceived, "STOR", strlen("STOR")) == 1 || compareStringCaseInsensitive(ftpData.clients[theSocketId].workerData.theCommandReceived, "APPE", strlen("APPE")) == 1) &&
ftpData.clients[theSocketId].fileToStor.textLen > 0)
{
if (compareStringCaseInsensitive(ftpData.clients[theSocketId].workerData.theCommandReceived, "APPE", strlen("APPE")) == 1)
{
#ifdef LARGE_FILE_SUPPORT_ENABLED
//#warning LARGE FILE SUPPORT IS ENABLED!
ftpData.clients[theSocketId].workerData.theStorFile = fopen64(ftpData.clients[theSocketId].fileToStor.text, "ab");
#endif
#ifndef LARGE_FILE_SUPPORT_ENABLED
#warning LARGE FILE SUPPORT IS NOT ENABLED!
ftpData.clients[theSocketId].workerData.theStorFile = fopen(ftpData.clients[theSocketId].fileToStor.text, "ab");
#endif
}
else
{
#ifdef LARGE_FILE_SUPPORT_ENABLED
//#warning LARGE FILE SUPPORT IS ENABLED!
ftpData.clients[theSocketId].workerData.theStorFile = fopen64(ftpData.clients[theSocketId].fileToStor.text, "wb");
#endif
#ifndef LARGE_FILE_SUPPORT_ENABLED
#warning LARGE FILE SUPPORT IS NOT ENABLED!
ftpData.clients[theSocketId].workerData.theStorFile = fopen(ftpData.clients[theSocketId].fileToStor.text, "wb");
#endif
}
if (ftpData.clients[theSocketId].workerData.theStorFile == NULL)
{
returnCode = socketPrintf(&ftpData, theSocketId, "s", "553 Unable to write the file\r\n");
if (returnCode <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 6");
pthread_exit(NULL);
}
break;
}
returnCode = socketPrintf(&ftpData, theSocketId, "s", "150 Accepted data connection\r\n");
if (returnCode <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 7");
pthread_exit(NULL);
}
while(1)
{
if (ftpData.clients[theSocketId].dataChannelIsTls != 1)
{
ftpData.clients[theSocketId].workerData.bufferIndex = read(ftpData.clients[theSocketId].workerData.socketConnection, ftpData.clients[theSocketId].workerData.buffer, CLIENT_BUFFER_STRING_SIZE);
}
else if (ftpData.clients[theSocketId].dataChannelIsTls == 1)
{
#ifdef OPENSSL_ENABLED
if (ftpData.clients[theSocketId].workerData.passiveModeOn == 1)
ftpData.clients[theSocketId].workerData.bufferIndex = SSL_read(ftpData.clients[theSocketId].workerData.serverSsl, ftpData.clients[theSocketId].workerData.buffer, CLIENT_BUFFER_STRING_SIZE);
else if(ftpData.clients[theSocketId].workerData.activeModeOn == 1)
ftpData.clients[theSocketId].workerData.bufferIndex = SSL_read(ftpData.clients[theSocketId].workerData.clientSsl, ftpData.clients[theSocketId].workerData.buffer, CLIENT_BUFFER_STRING_SIZE);
#endif
}
else
{
my_printf("\nError state");
}
if (ftpData.clients[theSocketId].workerData.bufferIndex == 0)
{
break;
}
else if (ftpData.clients[theSocketId].workerData.bufferIndex > 0)
{
fwrite(ftpData.clients[theSocketId].workerData.buffer, ftpData.clients[theSocketId].workerData.bufferIndex, 1, ftpData.clients[theSocketId].workerData.theStorFile);
usleep(100);
}
else if (ftpData.clients[theSocketId].workerData.bufferIndex < 0)
{
break;
}
}
int theReturnCode;
theReturnCode = fclose(ftpData.clients[theSocketId].workerData.theStorFile);
ftpData.clients[theSocketId].workerData.theStorFile = NULL;
if (ftpData.clients[theSocketId].login.ownerShip.ownerShipSet == 1)
{
FILE_doChownFromUidGid(ftpData.clients[theSocketId].fileToStor.text, ftpData.clients[theSocketId].login.ownerShip.uid, ftpData.clients[theSocketId].login.ownerShip.gid);
}
returnCode = socketPrintf(&ftpData, theSocketId, "s", "226 file stor ok\r\n");
if (returnCode <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 8");
pthread_exit(NULL);
}
break;
}
else if (ftpData.clients[theSocketId].workerData.commandReceived == 1 &&
( (compareStringCaseInsensitive(ftpData.clients[theSocketId].workerData.theCommandReceived, "LIST", strlen("LIST")) == 1)
|| (compareStringCaseInsensitive(ftpData.clients[theSocketId].workerData.theCommandReceived, "NLST", strlen("NLST")) == 1))
)
{
int theFiles = 0, theCommandType = 0;
if (compareStringCaseInsensitive(ftpData.clients[theSocketId].workerData.theCommandReceived, "LIST", strlen("LIST")) == 1)
theCommandType = COMMAND_TYPE_LIST;
else if (compareStringCaseInsensitive(ftpData.clients[theSocketId].workerData.theCommandReceived, "NLST", strlen("NLST")) == 1)
theCommandType = COMMAND_TYPE_NLST;
returnCode = socketPrintf(&ftpData, theSocketId, "s", "150 Accepted data connection\r\n");
if (returnCode <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 8");
pthread_exit(NULL);
}
returnCode = writeListDataInfoToSocket(&ftpData, theSocketId, &theFiles, theCommandType, &ftpData.clients[theSocketId].workerData.memoryTable);
if (returnCode <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 9");
pthread_exit(NULL);
}
returnCode = socketPrintf(&ftpData, theSocketId, "sds", "226 ", theFiles, " matches total\r\n");
if (returnCode <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 10");
pthread_exit(NULL);
}
break;
}
else if (ftpData.clients[theSocketId].workerData.commandReceived == 1 &&
compareStringCaseInsensitive(ftpData.clients[theSocketId].workerData.theCommandReceived, "RETR", strlen("RETR")) == 1)
{
long long int writenSize = 0, writeReturn = 0;
writeReturn = socketPrintf(&ftpData, theSocketId, "s", "150 Accepted data connection\r\n");
if (writeReturn <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 11");
pthread_exit(NULL);
}
writenSize = writeRetrFile(&ftpData, theSocketId, ftpData.clients[theSocketId].workerData.retrRestartAtByte, ftpData.clients[theSocketId].workerData.theStorFile);
ftpData.clients[theSocketId].workerData.retrRestartAtByte = 0;
if (writenSize <= -1)
{
writeReturn = socketPrintf(&ftpData, theSocketId, "s", "550 unable to open the file for reading\r\n");
if (writeReturn <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 12");
pthread_exit(NULL);
}
break;
}
writeReturn = socketPrintf(&ftpData, theSocketId, "s", "226-File successfully transferred\r\n226 done\r\n");
if (writeReturn <= 0)
{
ftpData.clients[theSocketId].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Closing the client 13");
pthread_exit(NULL);
}
break;
}
break;
}
else
{
break;
}
}
pthread_exit((void *)1);
pthread_cleanup_pop(0);
pthread_exit((void *)2);
return NULL;
}
void runFtpServer(void)
{
printf("\nHello uFTP server %s starting..\n", UFTP_SERVER_VERSION);
/* Needed for Select*/
static int processingSock = 0, returnCode = 0;
/* Handle signals */
signalHandlerInstall();
/*Read the configuration file */
configurationRead(&ftpData.ftpParameters, &ftpData.generalDynamicMemoryTable);
/* apply the reden configuration */
applyConfiguration(&ftpData.ftpParameters);
/* initialize the ftp data structure */
initFtpData(&ftpData);
my_printf("\nRespawn routine okay\n");
//Fork the process
respawnProcess();
//Init log
logInit(ftpData.ftpParameters.logFolder, ftpData.ftpParameters.maximumLogFileCount);
//Socket main creator
ftpData.connectionData.theMainSocket = createSocket(&ftpData);
printf("\nuFTP server starting..");
/* init fd set needed for select */
fdInit(&ftpData);
/* the maximum socket fd is now the main socket descriptor */
ftpData.connectionData.maxSocketFD = ftpData.connectionData.theMainSocket+1;
returnCode = pthread_create(&watchDogThread, NULL, watchDog, NULL);
if(returnCode != 0)
{
my_printf("pthread_create WatchDog Error %d", returnCode);
addLog("Pthead create error restarting the server", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
exit(0);
}
//Endless loop ftp process
while (1)
{
//Update watchdog timer
updateWatchDogTime((int)time(NULL));
my_printf("\nUsed memory : %lld", DYNMEM_GetTotalMemory());
int memCount = 0;
for (memCount = 0; memCount < ftpData.ftpParameters.maxClients; memCount++)
{
if (ftpData.clients[memCount].memoryTable != NULL)
{
my_printf("\nftpData.clients[%d].memoryTable = %s", memCount, ftpData.clients[memCount].memoryTable->theName);
}
if (ftpData.clients[memCount].workerData.memoryTable != NULL)
{
my_printf("\nftpData.clients[%d].workerData.memoryTable = %s", memCount, ftpData.clients[memCount].workerData.memoryTable->theName);
}
if (ftpData.clients[memCount].workerData.directoryInfo.memoryTable != NULL)
{
my_printf("\nftpData.clients[%d].workerData.directoryInfo.memoryTable = %s", memCount, ftpData.clients[memCount].workerData.directoryInfo.memoryTable->theName);
}
}
/* waits for socket activity, if no activity then checks for client socket timeouts */
if (selectWait(&ftpData) == 0)
{
checkClientConnectionTimeout(&ftpData);
flushLoginWrongTriesData(&ftpData);
}
/*Main loop handle client commands */
for (processingSock = 0; processingSock < ftpData.ftpParameters.maxClients; processingSock++)
{
/* close the connection if quit flag has been set */
if (ftpData.clients[processingSock].closeTheClient == 1)
{
closeClient(&ftpData, processingSock);
continue;
}
/* Check if there are client pending connections, accept the connection if possible otherwise reject */
if ((returnCode = evaluateClientSocketConnection(&ftpData)) == 1)
{
break;
}
/* no data to check client is not connected, continue to check other clients */
if (isClientConnected(&ftpData, processingSock) == 0)
{
/* socket is not conneted */
continue;
}
if (FD_ISSET(ftpData.clients[processingSock].socketDescriptor, &ftpData.connectionData.rset) ||
FD_ISSET(ftpData.clients[processingSock].socketDescriptor, &ftpData.connectionData.eset))
{
#ifdef OPENSSL_ENABLED
if (ftpData.clients[processingSock].tlsIsNegotiating == 1)
{
returnCode = SSL_accept(ftpData.clients[processingSock].ssl);
if (returnCode <= 0)
{
//my_printf("\nSSL NOT YET ACCEPTED: %d", returnCode);
ftpData.clients[processingSock].tlsIsEnabled = 0;
ftpData.clients[processingSock].tlsIsNegotiating = 1;
if ( ((int)time(NULL) - ftpData.clients[processingSock].tlsNegotiatingTimeStart) > TLS_NEGOTIATING_TIMEOUT )
{
ftpData.clients[processingSock].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
//my_printf("\nTLS timeout closing the client time:%lld, start time: %lld..", (int)time(NULL), ftpData.clients[processingSock].tlsNegotiatingTimeStart);
}
}
else
{
//my_printf("\nSSL ACCEPTED");
ftpData.clients[processingSock].tlsIsEnabled = 1;
ftpData.clients[processingSock].tlsIsNegotiating = 0;
}
continue;
}
#endif
if (ftpData.clients[processingSock].tlsIsEnabled == 1)
{
#ifdef OPENSSL_ENABLED
ftpData.clients[processingSock].bufferIndex = SSL_read(ftpData.clients[processingSock].ssl, ftpData.clients[processingSock].buffer, CLIENT_BUFFER_STRING_SIZE);
#endif
}
else
{
ftpData.clients[processingSock].bufferIndex = read(ftpData.clients[processingSock].socketDescriptor, ftpData.clients[processingSock].buffer, CLIENT_BUFFER_STRING_SIZE);
}
//The client is not connected anymore
if ((ftpData.clients[processingSock].bufferIndex) == 0)
{
//addLog("Client not connected anymore", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
closeClient(&ftpData, processingSock);
}
//Debug print errors
if (ftpData.clients[processingSock].bufferIndex < 0)
{
//ftpData.clients[processingSock].closeTheClient = 1;
//addLog("Socket write error ", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
//my_printfError("\n1 Errno = %d", errno);
continue;
}
//Some commands has been received
if (ftpData.clients[processingSock].bufferIndex > 0)
{
int i = 0;
int commandProcessStatus = 0;
for (i = 0; i < ftpData.clients[processingSock].bufferIndex; i++)
{
if (ftpData.clients[processingSock].commandIndex < CLIENT_COMMAND_STRING_SIZE)
{
if (ftpData.clients[processingSock].buffer[i] != '\r' && ftpData.clients[processingSock].buffer[i] != '\n')
{
ftpData.clients[processingSock].theCommandReceived[ftpData.clients[processingSock].commandIndex++] = ftpData.clients[processingSock].buffer[i];
}
if (ftpData.clients[processingSock].buffer[i] == '\n')
{
ftpData.clients[processingSock].socketCommandReceived = 1;
//my_printf("\n Processing the command: %s", ftpData.clients[processingSock].theCommandReceived);
commandProcessStatus = processCommand(processingSock);
//Echo unrecognized commands
if (commandProcessStatus == FTP_COMMAND_NOT_RECONIZED)
{
int returnCode = 0;
returnCode = socketPrintf(&ftpData, processingSock, "s", "500 Unknown command\r\n");
if (returnCode < 0)
{
ftpData.clients[processingSock].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
}
my_printf("\n COMMAND NOT SUPPORTED ********* %s", ftpData.clients[processingSock].buffer);
}
else if (commandProcessStatus == FTP_COMMAND_PROCESSED)
{
ftpData.clients[processingSock].lastActivityTimeStamp = (int)time(NULL);
}
else if (commandProcessStatus == FTP_COMMAND_PROCESSED_WRITE_ERROR)
{
ftpData.clients[processingSock].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
my_printf("\n Write error WARNING!");
}
}
}
else
{
//Command overflow can't be processed
int returnCode;
ftpData.clients[processingSock].commandIndex = 0;
memset(ftpData.clients[processingSock].theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE+1);
returnCode = socketPrintf(&ftpData, processingSock, "s", "500 Unknown command\r\n");
if (returnCode <= 0)
{
ftpData.clients[processingSock].closeTheClient = 1;
addLog("Closing the client", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
}
my_printf("\n Command too long closing the client.");
break;
}
}
usleep(100);
memset(ftpData.clients[processingSock].buffer, 0, CLIENT_BUFFER_STRING_SIZE+1);
}
}
}
}
//Server Close
shutdown(ftpData.connectionData.theMainSocket, SHUT_RDWR);
close(ftpData.connectionData.theMainSocket);
return;
}
static int processCommand(int processingElement)
{
int toReturn = 0;
//printTimeStamp();
my_printf ("\nCommand received from (%d): %s", processingElement, ftpData.clients[processingElement].theCommandReceived);
cleanDynamicStringDataType(&ftpData.clients[processingElement].ftpCommand.commandArgs, 0, &ftpData.clients[processingElement].memoryTable);
cleanDynamicStringDataType(&ftpData.clients[processingElement].ftpCommand.commandOps, 0, &ftpData.clients[processingElement].memoryTable);
if (ftpData.clients[processingElement].login.userLoggedIn == 0 &&
(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "USER", strlen("USER")) != 1 &&
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "PASS", strlen("PASS")) != 1 &&
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "QUIT", strlen("QUIT")) != 1 &&
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "PBSZ", strlen("PBSZ")) != 1 &&
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "PROT", strlen("PROT")) != 1 &&
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "CCC", strlen("CCC")) != 1 &&
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "AUTH", strlen("AUTH")) != 1))
{
toReturn = notLoggedInMessage(&ftpData, processingElement);
ftpData.clients[processingElement].commandIndex = 0;
memset(ftpData.clients[processingElement].theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE+1);
return 1;
}
//Process Command
if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "USER", strlen("USER")) == 1)
{
//my_printf("\nUSER COMMAND RECEIVED");
toReturn = parseCommandUser(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "PASS", strlen("PASS")) == 1)
{
//my_printf("\nPASS COMMAND RECEIVED");
toReturn = parseCommandPass(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "SITE", strlen("SITE")) == 1)
{
//my_printf("\nSITE COMMAND RECEIVED");
toReturn = parseCommandSite(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "AUTH", strlen("AUTH")) == 1)
{
//my_printf("\nAUTH COMMAND RECEIVED");
toReturn = parseCommandAuth(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "PROT", strlen("PROT")) == 1)
{
//my_printf("\nPROT COMMAND RECEIVED");
toReturn = parseCommandProt(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "PBSZ", strlen("PBSZ")) == 1)
{
//my_printf("\nPBSZ COMMAND RECEIVED");
toReturn = parseCommandPbsz(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "CCC", strlen("CCC")) == 1)
{
//my_printf("\nCCC COMMAND RECEIVED");
toReturn = parseCommandCcc(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "PWD", strlen("PWD")) == 1 ||
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "XPWD", strlen("XPWD")) == 1)
{
// XPWD
//my_printf("\nPWD COMMAND RECEIVED");
toReturn = parseCommandPwd(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "SYST", strlen("SYST")) == 1)
{
//my_printf("\nSYST COMMAND RECEIVED");
toReturn = parseCommandSyst(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "FEAT", strlen("FEAT")) == 1)
{
//my_printf("\nFEAT COMMAND RECEIVED");
toReturn = parseCommandFeat(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "TYPE I", strlen("TYPE I")) == 1)
{
//my_printf("\nTYPE I COMMAND RECEIVED");
toReturn = parseCommandTypeI(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "STRU F", strlen("STRU F")) == 1)
{
//my_printf("\nTYPE I COMMAND RECEIVED");
toReturn = parseCommandStruF(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "MODE S", strlen("MODE S")) == 1)
{
//my_printf("\nMODE S COMMAND RECEIVED");
toReturn = parseCommandModeS(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "TYPE A", strlen("TYPE A")) == 1)
{
//my_printf("\nTYPE A COMMAND RECEIVED");
toReturn = parseCommandTypeI(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "EPSV", strlen("EPSV")) == 1)
{
my_printf("\nEPSV COMMAND RECEIVED");
toReturn = parseCommandEpsv(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "PASV", strlen("PASV")) == 1)
{
my_printf("\nPASV COMMAND RECEIVED");
toReturn = parseCommandPasv(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "PORT", strlen("PORT")) == 1)
{
my_printf("\nPORT COMMAND RECEIVED");
toReturn = parseCommandPort(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "EPRT", strlen("EPRT")) == 1)
{
my_printf("\nEPRT COMMAND RECEIVED");
toReturn = parseCommandEprt(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "LIST", strlen("LIST")) == 1)
{
//my_printf("\nLIST COMMAND RECEIVED");
toReturn = parseCommandList(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "STAT", strlen("STAT")) == 1)
{
my_printf("\nSTAT COMMAND RECEIVED");
toReturn = parseCommandStat(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "CDUP", strlen("CDUP")) == 1 ||
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "XCUP", strlen("XCUP")) == 1 ||
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "CWD ..", strlen("CWD ..")) == 1)
{
//my_printf("\nCDUP COMMAND RECEIVED");
toReturn = parseCommandCdup(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "CWD", strlen("CWD")) == 1)
{
//my_printf("\nCWD COMMAND RECEIVED");
toReturn = parseCommandCwd(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "REST", strlen("REST")) == 1)
{
//my_printf("\nREST COMMAND RECEIVED");
toReturn = parseCommandRest(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "RETR", strlen("RETR")) == 1)
{
//my_printf("\nRETR COMMAND RECEIVED");
toReturn = parseCommandRetr(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "STOR", strlen("STOR")) == 1)
{
//my_printf("\nSTOR COMMAND RECEIVED");
toReturn = parseCommandStor(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "MKD", strlen("MKD")) == 1 ||
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "XMKD", strlen("XMKD")) == 1)
{
//my_printf("\nMKD command received");
toReturn = parseCommandMkd(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "ABOR", strlen("ABOR")) == 1)
{
//my_printf("\nABOR command received");
toReturn = parseCommandAbor(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "DELE", strlen("DELE")) == 1)
{
//my_printf("\nDELE comman200 OKd received");
toReturn = parseCommandDele(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "OPTS", strlen("OPTS")) == 1)
{
//my_printf("\nOPTS command received");
toReturn = parseCommandOpts(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "MDTM", strlen("MDTM")) == 1)
{
my_printf("\nMTDM command received");
toReturn = parseCommandMdtm(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "NLST", strlen("NLST")) == 1)
{
// my_printf("\nNLST command received");
toReturn = parseCommandNlst(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "QUIT", strlen("QUIT")) == 1)
{
//my_printf("\nQUIT command received");
toReturn = parseCommandQuit(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "RMD", strlen("RMD")) == 1 ||
compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "XRMD", strlen("XRMD")) == 1)
{
// XRMD
// my_printf("\nRMD command received");
toReturn = parseCommandRmd(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "RNFR", strlen("RNFR")) == 1)
{
// my_printf("\nRNFR command received");
toReturn = parseCommandRnfr(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "RNTO", strlen("RNTO")) == 1)
{
// my_printf("\nRNTO command received");
toReturn = parseCommandRnto(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "SIZE", strlen("SIZE")) == 1)
{
//my_printf("\nSIZE command received");
toReturn = parseCommandSize(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "APPE", strlen("APPE")) == 1)
{
// my_printf("\nAPPE command received");
toReturn = parseCommandAppe(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "NOOP", strlen("NOOP")) == 1)
{
//my_printf("\nNOOP command received");
toReturn = parseCommandNoop(&ftpData, processingElement);
}
else if(compareStringCaseInsensitive(ftpData.clients[processingElement].theCommandReceived, "ACCT", strlen("ACCT")) == 1)
{
//my_printf("\nNOOP command received");
toReturn = parseCommandAcct(&ftpData, processingElement);
}
else
{
; //Parse unsupported command not needed
}
ftpData.clients[processingElement].commandIndex = 0;
memset(ftpData.clients[processingElement].theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE+1);
return toReturn;
}
void deallocateMemory(void)
{
int i = 0;
// my_printf("\n Deallocating the memory.. ");
// my_printf("\nDYNMEM_freeAll called");