mirror of
https://github.com/kingk85/uFTP.git
synced 2025-07-15 00:06:12 +03:00
927 lines
41 KiB
C
927 lines
41 KiB
C
/*
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* To change this license header, choose License Headers in Project Properties.
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* To change this template file, choose Tools | Templates
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* and open the template in the editor.
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <pthread.h>
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/* FTP LIBS */
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#include "ftpServer.h"
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#include "ftpData.h"
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#include "ftpCommandsElaborate.h"
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#include "library/fileManagement.h"
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#include "library/logFunctions.h"
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#include "library/configRead.h"
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/* Catch Signal Handler functio */
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void signal_callback_handler(int signum){
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printf("Caught signal SIGPIPE %d\n",signum);
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}
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#define SERVER_PORT 21
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static ftpDataType ftpData;
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static int createSocket(int port);
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static void closeSocket(int processingSocket);
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static void initFtpData(void);
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static int processCommand(int processingElement);
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static int getMaximumSocketFd(int mainSocket, ftpDataType * data);
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void pasvThreadHandlerCleanup(void *socketId)
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{
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int theSocketId = *(int *)socketId;
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printTimeStamp();
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printf("\nCleanup called for thread id: %d", theSocketId);
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printf("\nClosing pasv socket (%d) ok!", theSocketId);
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shutdown(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, SHUT_RDWR);
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shutdown(ftpData.clients[theSocketId].pasvData.passiveSocket, SHUT_RDWR);
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close(ftpData.clients[theSocketId].pasvData.passiveSocketConnection);
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close(ftpData.clients[theSocketId].pasvData.passiveSocket);
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resetPasvData(&ftpData.clients[theSocketId].pasvData, 0);
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}
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void *pasvThreadHandler(void * socketId)
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{
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int theSocketId = *(int *)socketId;
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pthread_cleanup_push(pasvThreadHandlerCleanup, (void *) &theSocketId);
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//Setting Alive Flag
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ftpData.clients[theSocketId].pasvData.threadIsAlive = 1;
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printf("\nPasv (%d) thread init opening port: %d", theSocketId, ftpData.clients[theSocketId].pasvData.passivePort);
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ftpData.clients[theSocketId].pasvData.passiveSocket = createPassiveSocket(ftpData.clients[theSocketId].pasvData.passivePort);
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//Endless loop ftp process
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while (1)
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{
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usleep(1000);
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if (ftpData.clients[theSocketId].pasvData.passiveSocketIsConnected == 0)
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{
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//printTimeStamp();
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//printf("Waiting for pasv client connection on port: %d", ftpData.clients[theSocketId].pasvData.passivePort);
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//Wait for sockets
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if ((ftpData.clients[theSocketId].pasvData.passiveSocketConnection = accept(ftpData.clients[theSocketId].pasvData.passiveSocket, 0, 0))!=-1)
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{
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printTimeStamp();
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printf("\nPasv (%d) connection initialized", theSocketId);
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int error;
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ftpData.clients[theSocketId].pasvData.passiveSocketIsConnected = 1;
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//error = fcntl(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, F_SETFL, O_NONBLOCK);
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}
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}
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else
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{
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//Conditional lock on thread actions
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pthread_mutex_lock(&ftpData.clients[theSocketId].pasvData.conditionMutex);
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printTimeStamp();
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printf("\nPasv (%d) waiting for commands..", theSocketId);
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while (ftpData.clients[theSocketId].pasvData.commandReceived == 0) {
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printf("\nPasv (%d) waiting for conditional variable..", theSocketId);
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pthread_cond_wait(&ftpData.clients[theSocketId].pasvData.conditionVariable, &ftpData.clients[theSocketId].pasvData.conditionMutex);
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}
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printf("\nPasv (%d) waiting ok, unlock mutex", theSocketId);
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pthread_mutex_unlock(&ftpData.clients[theSocketId].pasvData.conditionMutex);
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printf("\nPasv (%d) processing commands..", theSocketId);
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//the connection is closed
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// if ((ftpData.clients[theSocketId].pasvData.bufferIndex = read(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, ftpData.clients[theSocketId].pasvData.buffer, CLIENT_BUFFER_STRING_SIZE)) == 0)
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// {
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/// break;
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// }
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//Some data is received
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//if (ftpData.clients[theSocketId].pasvData.bufferIndex > 0)
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// {
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// int i = 0;
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// for (i = 0; i < ftpData.clients[theSocketId].pasvData.bufferIndex; i++)
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// {
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// ;
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// }
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// usleep(100);
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//write(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, ftpData.clients[theSocketId].pasvData.buffer, ftpData.clients[theSocketId].pasvData.bufferIndex);
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// }
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if (ftpData.clients[theSocketId].pasvData.commandReceived == 1 &&
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((strncmp(ftpData.clients[theSocketId].pasvData.theCommandReceived, "STOR", strlen("STOR")) == 0) ||
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(strncmp(ftpData.clients[theSocketId].pasvData.theCommandReceived, "stor", strlen("stor")) == 0)) &&
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ftpData.clients[theSocketId].pasvData.theFileNameToStorIndex > 0)
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{
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//Set the busy flag
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ftpData.clients[theSocketId].pasvData.threadIsBusy = 1;
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FILE *theStorFile;
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char theResponse[FTP_COMMAND_ELABORATE_CHAR_BUFFER];
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memset(theResponse, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
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char theAbsoluteFileNamePath[FTP_COMMAND_ELABORATE_CHAR_BUFFER];
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memset(theAbsoluteFileNamePath, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
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dynamicStringDataType fileNameToStor;
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if (ftpData.clients[theSocketId].pasvData.theFileNameToStor[0] == '/')
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{
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setDynamicStringDataType(&fileNameToStor, ftpData.clients[theSocketId].login.homePath.text, ftpData.clients[theSocketId].login.homePath.textLen);
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appendToDynamicStringDataType(&fileNameToStor, ftpData.clients[theSocketId].pasvData.theFileNameToStor, strlen(ftpData.clients[theSocketId].pasvData.theFileNameToStor));
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}
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else
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{
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setDynamicStringDataType(&fileNameToStor, ftpData.clients[theSocketId].login.absolutePath.text, ftpData.clients[theSocketId].login.absolutePath.textLen);
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appendToDynamicStringDataType(&fileNameToStor, "/", 1);
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appendToDynamicStringDataType(&fileNameToStor, ftpData.clients[theSocketId].pasvData.theFileNameToStor, strlen(ftpData.clients[theSocketId].pasvData.theFileNameToStor));
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}
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theStorFile = fopen(fileNameToStor.text, "wb");
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printf("\nftpData.clients[theSocketId].pasvData.theFileNameToStor: %s", ftpData.clients[theSocketId].pasvData.theFileNameToStor);
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printf("\nftpData.clients[theSocketId].login.absolutePath.text: %s", ftpData.clients[theSocketId].login.absolutePath.text);
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printf("\nSaving new file to the server: %s", fileNameToStor.text);
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strcpy(theResponse, "150 Accepted data connection\r\n");
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write(ftpData.clients[theSocketId].socketDescriptor, theResponse, strlen(theResponse));
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while(1)
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{
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if ((ftpData.clients[theSocketId].pasvData.bufferIndex = read(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, ftpData.clients[theSocketId].pasvData.buffer, CLIENT_BUFFER_STRING_SIZE)) == 0)
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{
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//Client is disconnected!
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break;
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}
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if (ftpData.clients[theSocketId].pasvData.bufferIndex > 0)
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{
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fwrite(ftpData.clients[theSocketId].pasvData.buffer, ftpData.clients[theSocketId].pasvData.bufferIndex, 1, theStorFile);
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usleep(100);
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}
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}
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fclose(theStorFile);
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cleanDynamicStringDataType(&fileNameToStor, 0);
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memset(theResponse, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
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sprintf(theResponse, "226 file stor ok\r\n");
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write(ftpData.clients[theSocketId].socketDescriptor, theResponse, strlen(theResponse));
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break;
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}
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else if (ftpData.clients[theSocketId].pasvData.commandReceived == 1 &&
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((strncmp(ftpData.clients[theSocketId].pasvData.theCommandReceived, "LIST", strlen("LIST")) == 0) ||
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(strncmp(ftpData.clients[theSocketId].pasvData.theCommandReceived, "list", strlen("list")) == 0))
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)
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{
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DYNV_VectorGenericDataType directoryInfo;
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DYNV_VectorGeneric_Init(&directoryInfo);
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dynamicStringDataType theListFilePathToRead;
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cleanDynamicStringDataType(&theListFilePathToRead, 1);
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char * theListFilePathArg;
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theListFilePathArg = getFtpCommandArg("LIST", ftpData.clients[theSocketId].pasvData.theCommandReceived);
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if (strlen(theListFilePathArg) > 0)
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{
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printf("\n List path arg is : %s", theListFilePathArg);
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if (theListFilePathArg[0] == '/')
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{
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setDynamicStringDataType(&theListFilePathToRead, ftpData.clients[theSocketId].login.homePath.text, ftpData.clients[theSocketId].login.homePath.textLen);
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appendToDynamicStringDataType(&theListFilePathToRead, theListFilePathArg, strlen(theListFilePathArg));
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}
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else
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{
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setDynamicStringDataType(&theListFilePathToRead, ftpData.clients[theSocketId].login.absolutePath.text, ftpData.clients[theSocketId].login.absolutePath.textLen);
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appendToDynamicStringDataType(&theListFilePathToRead, "/", 1);
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appendToDynamicStringDataType(&theListFilePathToRead, theListFilePathArg, strlen(theListFilePathArg));
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}
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}
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else
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{
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printf("\n No List path specified");
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setDynamicStringDataType(&theListFilePathToRead, ftpData.clients[theSocketId].login.absolutePath.text, ftpData.clients[theSocketId].login.absolutePath.textLen);
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}
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//printf("directoryInfo address: %lX", &directoryInfo);
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int i;
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getListDataInfo(theListFilePathToRead.text, &directoryInfo);
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printf("\nPasv (%d) ftpData.clients[theSocketId].login.absolutePath.text = %s",theSocketId, ftpData.clients[theSocketId].login.absolutePath.text);
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char theResponse[FTP_COMMAND_ELABORATE_CHAR_BUFFER];
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memset(theResponse, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
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strcpy(theResponse, "150 Accepted data connection\r\n");
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write(ftpData.clients[theSocketId].socketDescriptor, theResponse, strlen(theResponse));
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char theBufferWrite[1024];
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memset(theBufferWrite, 0, 1024);
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sprintf(theBufferWrite, "total %d\r\n", directoryInfo.Size);
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write(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, theBufferWrite, strlen(theBufferWrite));
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//printf("%s", theBufferWrite);
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for (i = 0; i < directoryInfo.Size; i++)
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{
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memset(theBufferWrite, 0, 1024);
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sprintf(theBufferWrite, "%s %d %s %s %d %s %s\r\n", ((ftpListDataType *) directoryInfo.Data[i])->inodePermissionString
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,((ftpListDataType *) directoryInfo.Data[i])->numberOfSubDirectories
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,((ftpListDataType *) directoryInfo.Data[i])->owner
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,((ftpListDataType *) directoryInfo.Data[i])->groupOwner
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,((ftpListDataType *) directoryInfo.Data[i])->fileSize
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,((ftpListDataType *) directoryInfo.Data[i])->lastModifiedDataString
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,((ftpListDataType *) directoryInfo.Data[i])->fileNameNoPath);
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//printf("%s", theBufferWrite);
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write(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, theBufferWrite, strlen(theBufferWrite));
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}
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memset(theResponse, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
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sprintf(theResponse, "226 %d matches total\r\n", directoryInfo.Size);
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write(ftpData.clients[theSocketId].socketDescriptor, theResponse, strlen(theResponse));
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int theSize = directoryInfo.Size;
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char ** lastToDestroy = NULL;
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if (theSize > 0)
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{
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lastToDestroy = ((ftpListDataType *)directoryInfo.Data[0])->fileList;
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}
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directoryInfo.Destroy(&directoryInfo, deleteListDataInfoVector);
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if (theSize > 0)
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{
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free(lastToDestroy);
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}
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printf("\nPasv (%d) List end", theSocketId);
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cleanDynamicStringDataType(&theListFilePathToRead, 0);
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break;
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}
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else if (ftpData.clients[theSocketId].pasvData.commandReceived == 1 &&
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((strncmp(ftpData.clients[theSocketId].pasvData.theCommandReceived, "NLST", strlen("NLST")) == 0) ||
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(strncmp(ftpData.clients[theSocketId].pasvData.theCommandReceived, "nlst", strlen("nlst")) == 0))
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)
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{
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DYNV_VectorGenericDataType directoryInfo;
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DYNV_VectorGeneric_Init(&directoryInfo);
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dynamicStringDataType theListFilePathToRead;
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cleanDynamicStringDataType(&theListFilePathToRead, 1);
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char * theListFilePathArg;
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theListFilePathArg = getFtpCommandArg("NLST", ftpData.clients[theSocketId].pasvData.theCommandReceived);
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if (strlen(theListFilePathArg) > 0)
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{
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printf("\n NLST path arg is : %s", theListFilePathArg);
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if (theListFilePathArg[0] == '/')
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{
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setDynamicStringDataType(&theListFilePathToRead, ftpData.clients[theSocketId].login.homePath.text, ftpData.clients[theSocketId].login.homePath.textLen);
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appendToDynamicStringDataType(&theListFilePathToRead, theListFilePathArg, strlen(theListFilePathArg));
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}
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else
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{
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setDynamicStringDataType(&theListFilePathToRead, ftpData.clients[theSocketId].login.absolutePath.text, ftpData.clients[theSocketId].login.absolutePath.textLen);
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appendToDynamicStringDataType(&theListFilePathToRead, "/", 1);
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appendToDynamicStringDataType(&theListFilePathToRead, theListFilePathArg, strlen(theListFilePathArg));
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}
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}
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else
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{
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printf("\n No NLST path specified");
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setDynamicStringDataType(&theListFilePathToRead, ftpData.clients[theSocketId].login.absolutePath.text, ftpData.clients[theSocketId].login.absolutePath.textLen);
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}
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//printf("directoryInfo address: %lX", &directoryInfo);
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int i;
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getListDataInfo(theListFilePathToRead.text, &directoryInfo);
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printf("\nPasv (%d) ftpData.clients[theSocketId].login.absolutePath.text = %s",theSocketId, ftpData.clients[theSocketId].login.absolutePath.text);
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char theResponse[FTP_COMMAND_ELABORATE_CHAR_BUFFER];
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memset(theResponse, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
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strcpy(theResponse, "150 Accepted data connection\r\n");
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write(ftpData.clients[theSocketId].socketDescriptor, theResponse, strlen(theResponse));
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char theBufferWrite[1024];
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memset(theBufferWrite, 0, 1024);
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sprintf(theBufferWrite, "total %d\r\n", directoryInfo.Size);
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write(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, theBufferWrite, strlen(theBufferWrite));
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//printf("%s", theBufferWrite);
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for (i = 0; i < directoryInfo.Size; i++)
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{
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memset(theBufferWrite, 0, 1024);
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sprintf(theBufferWrite, "%s\r\n"
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,((ftpListDataType *) directoryInfo.Data[i])->fileNameNoPath);
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//printf("%s", theBufferWrite);
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write(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, theBufferWrite, strlen(theBufferWrite));
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}
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memset(theResponse, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
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sprintf(theResponse, "226 %d matches total\r\n", directoryInfo.Size);
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write(ftpData.clients[theSocketId].socketDescriptor, theResponse, strlen(theResponse));
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int theSize = directoryInfo.Size;
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char ** lastToDestroy = NULL;
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if (theSize > 0)
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{
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lastToDestroy = ((ftpListDataType *)directoryInfo.Data[0])->fileList;
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}
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directoryInfo.Destroy(&directoryInfo, deleteListDataInfoVector);
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if (theSize > 0)
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{
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free(lastToDestroy);
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}
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printf("\nPasv (%d) List end", theSocketId);
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cleanDynamicStringDataType(&theListFilePathToRead, 0);
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break;
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}
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else if (ftpData.clients[theSocketId].pasvData.commandReceived == 1 &&
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((strncmp(ftpData.clients[theSocketId].pasvData.theCommandReceived, "RETR", strlen("RETR")) == 0) ||
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(strncmp(ftpData.clients[theSocketId].pasvData.theCommandReceived, "retr", strlen("retr")) == 0)))
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{
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//Set the busy flag
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ftpData.clients[theSocketId].pasvData.threadIsBusy = 1;
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int theFileSize = 0;
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int writenSize = 0;
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char theResponse[FTP_COMMAND_ELABORATE_CHAR_BUFFER];
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printTimeStamp();
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printf("The (%d) pasvData Command: %s",theSocketId, ftpData.clients[theSocketId].pasvData.theCommandReceived);
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int writeReturn = 0;
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int i;
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char theFileName[CLIENT_COMMAND_STRING_SIZE];
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int theFileNameCursor = 0;
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memset(theFileName, 0, CLIENT_COMMAND_STRING_SIZE);
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for (i = strlen("RETR") + 1; i < CLIENT_COMMAND_STRING_SIZE; i++)
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{
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if (ftpData.clients[theSocketId].pasvData.theCommandReceived[i] == '\r' ||
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ftpData.clients[theSocketId].pasvData.theCommandReceived[i] == '\n' ||
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ftpData.clients[theSocketId].pasvData.theCommandReceived[i] == '\0') {
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break;
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}
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if (theFileNameCursor < CLIENT_COMMAND_STRING_SIZE)
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{
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theFileName[theFileNameCursor++] = ftpData.clients[theSocketId].pasvData.theCommandReceived[i];
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}
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}
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dynamicStringDataType theFullFileName;
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if (ftpData.clients[theSocketId].pasvData.theFileNameToStor[0] == '/')
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{
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setDynamicStringDataType(&theFullFileName, ftpData.clients[theSocketId].login.homePath.text, ftpData.clients[theSocketId].login.homePath.textLen);
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appendToDynamicStringDataType(&theFullFileName, theFileName, strlen(theFileName));
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}
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else
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{
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setDynamicStringDataType(&theFullFileName, ftpData.clients[theSocketId].login.absolutePath.text, ftpData.clients[theSocketId].login.absolutePath.textLen);
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appendToDynamicStringDataType(&theFullFileName, "/", 1);
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appendToDynamicStringDataType(&theFullFileName, theFileName, strlen(theFileName));
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}
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if (FILE_IsFile(theFullFileName.text) == 0)
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break;
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theFileSize = FILE_GetFileSizeFromPath(theFullFileName.text);
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memset(theResponse, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
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strcpy(theResponse, "150 Accepted data connection\r\n");
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writeReturn = write(ftpData.clients[theSocketId].socketDescriptor, theResponse, strlen(theResponse));
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printf("\nPasv (%d) writeReturn: %d",theSocketId, writeReturn);
|
|
|
|
writenSize = writeRetrFile(theFullFileName.text, ftpData.clients[theSocketId].pasvData.passiveSocketConnection, ftpData.clients[theSocketId].pasvData.retrRestartAtByte);
|
|
|
|
//writeReturn = write(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, theFullFileContent+ftpData.clients[theSocketId].pasvData.retrRestartAtByte, theFileSize-ftpData.clients[theSocketId].pasvData.retrRestartAtByte);
|
|
ftpData.clients[theSocketId].pasvData.retrRestartAtByte = 0;
|
|
printf("\nPasv (%d) writeReturn data: %d",theSocketId, writeReturn);
|
|
|
|
cleanDynamicStringDataType(&theFullFileName, 0);
|
|
|
|
|
|
memset(theResponse, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
|
|
sprintf(theResponse, "226-File successfully transferred\r\n226 done\r\n");
|
|
writeReturn = write(ftpData.clients[theSocketId].socketDescriptor, theResponse, strlen(theResponse));
|
|
printf("\nPasv (%d) writeReturn response to 21: %d",theSocketId, writeReturn);
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
pthread_exit((void *)1);
|
|
pthread_cleanup_pop(0);
|
|
pthread_exit((void *)2);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void runFtpServer(void)
|
|
{
|
|
|
|
DYNV_VectorGenericDataType configParameters;
|
|
static int processingSock = 0;
|
|
static int maxSocketFD = 0;
|
|
|
|
DYNV_VectorGeneric_Init(&configParameters);
|
|
readConfigurationFile("./config.cfg", &configParameters);
|
|
parseConfigurationFile(&ftpData.ftpParameters, &configParameters);
|
|
|
|
initFtpData();
|
|
|
|
//Socket main creator
|
|
ftpData.theSocket = createSocket(SERVER_PORT);
|
|
printTimeStamp();
|
|
printf("uFTP server starting..");
|
|
printf("\n Server: Clients connected: %d", ftpData.connectedClients);
|
|
printf("\nServer: Max Client Allowed: %d", ftpData.ftpParameters.maxClients);
|
|
fd_set rset, wset, eset, rsetTemp, wsetTemp, esetTemp;
|
|
//Initialize the select structure
|
|
FD_ZERO(&rset);
|
|
FD_ZERO(&wset);
|
|
FD_ZERO(&eset);
|
|
|
|
FD_ZERO(&rsetTemp);
|
|
FD_ZERO(&wsetTemp);
|
|
FD_ZERO(&esetTemp);
|
|
|
|
FD_SET(ftpData.theSocket, &rset);
|
|
FD_SET(ftpData.theSocket, &wset);
|
|
FD_SET(ftpData.theSocket, &eset);
|
|
|
|
maxSocketFD = ftpData.theSocket+1;
|
|
|
|
//Endless loop ftp process
|
|
while (1)
|
|
{
|
|
int selectResult;
|
|
struct timeval selectMaximumLockTime; // sleep for 1 second!
|
|
selectMaximumLockTime.tv_sec = 10;
|
|
selectMaximumLockTime.tv_usec = 0;
|
|
|
|
|
|
memcpy(&rsetTemp, &rset, sizeof(rsetTemp));
|
|
memcpy(&wsetTemp, &wset, sizeof(wsetTemp));
|
|
memcpy(&esetTemp, &eset, sizeof(esetTemp));
|
|
|
|
//printf("\n\nSelect will wait for socket data.. ");
|
|
if (ftpData.connectedClients < ftpData.ftpParameters.maxClients)
|
|
{
|
|
printf("\nServer: Clients connected: %d", ftpData.connectedClients);
|
|
selectResult = select(maxSocketFD, &rsetTemp, NULL, &esetTemp, &selectMaximumLockTime);
|
|
}
|
|
else
|
|
{
|
|
printf("\nServer (maximum reached): Clients connected: %d", ftpData.connectedClients);
|
|
selectResult = select(maxSocketFD, &rsetTemp, NULL, &esetTemp, &selectMaximumLockTime);
|
|
}
|
|
|
|
if (selectResult == 0)
|
|
{
|
|
printf("select() timed out!\n");
|
|
continue;
|
|
}
|
|
|
|
for (processingSock = 0; processingSock < ftpData.ftpParameters.maxClients; processingSock++)
|
|
{
|
|
if (ftpData.clients[processingSock].socketIsConnected == 0 &&
|
|
FD_ISSET(ftpData.theSocket, &rsetTemp))
|
|
{
|
|
//Wait for sockets
|
|
if ((ftpData.clients[processingSock].socketDescriptor = accept(ftpData.theSocket,0 ,0 ))!=-1)
|
|
{
|
|
int error;
|
|
ftpData.connectedClients++;
|
|
ftpData.clients[processingSock].socketIsConnected = 1;
|
|
error = fcntl(ftpData.clients[processingSock].socketDescriptor, F_SETFL, O_NONBLOCK);
|
|
printTimeStamp();
|
|
printf("Server: New client connected with id: %d", processingSock);
|
|
printf("\nServer: Clients connected: %d", ftpData.connectedClients);
|
|
write(ftpData.clients[processingSock].socketDescriptor, ftpData.welcomeMessage, strlen(ftpData.welcomeMessage));
|
|
|
|
FD_SET(ftpData.clients[processingSock].socketDescriptor, &rset);
|
|
FD_SET(ftpData.clients[processingSock].socketDescriptor, &wset);
|
|
FD_SET(ftpData.clients[processingSock].socketDescriptor, &eset);
|
|
|
|
maxSocketFD = getMaximumSocketFd(ftpData.theSocket, &ftpData) + 1;
|
|
|
|
}
|
|
}
|
|
else if (FD_ISSET(ftpData.clients[processingSock].socketDescriptor, &rsetTemp) ||
|
|
FD_ISSET(ftpData.clients[processingSock].socketDescriptor, &esetTemp))
|
|
{
|
|
//The client is not connected anymore
|
|
if ((ftpData.clients[processingSock].bufferIndex = read(ftpData.clients[processingSock].socketDescriptor, ftpData.clients[processingSock].buffer, CLIENT_BUFFER_STRING_SIZE)) == 0)
|
|
{
|
|
FD_CLR(ftpData.clients[processingSock].socketDescriptor, &rset);
|
|
FD_CLR(ftpData.clients[processingSock].socketDescriptor, &wset);
|
|
FD_CLR(ftpData.clients[processingSock].socketDescriptor, &eset);
|
|
|
|
maxSocketFD = getMaximumSocketFd(ftpData.theSocket, &ftpData) + 1;
|
|
|
|
closeSocket(processingSock);
|
|
}
|
|
|
|
//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;
|
|
commandProcessStatus = processCommand(processingSock);
|
|
//Echo unrecognized commands
|
|
if (commandProcessStatus == 0)
|
|
{
|
|
write(ftpData.clients[processingSock].socketDescriptor, ftpData.clients[processingSock].buffer, ftpData.clients[processingSock].bufferIndex);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//Command overflow can't be processed
|
|
ftpData.clients[processingSock].commandIndex = 0;
|
|
memset(ftpData.clients[processingSock].theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE);
|
|
//Write some error message to the client
|
|
break;
|
|
}
|
|
}
|
|
usleep(100);
|
|
|
|
memset(ftpData.clients[processingSock].buffer, 0, CLIENT_BUFFER_STRING_SIZE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//Server Close
|
|
closeSocket(ftpData.theSocket);
|
|
printTimeStamp();
|
|
printf("Server: Closed.");
|
|
|
|
ftpData.clients[processingSock].socketIsConnected = 0;
|
|
return;
|
|
}
|
|
|
|
/* STATIC FUNCTIONS */
|
|
static int createSocket(int port)
|
|
{
|
|
int sock, errorCode;
|
|
struct sockaddr_in temp;
|
|
|
|
//Socket creation
|
|
sock = socket(AF_INET, SOCK_STREAM, 0);
|
|
temp.sin_family = AF_INET;
|
|
temp.sin_addr.s_addr = INADDR_ANY;
|
|
temp.sin_port = htons(port);
|
|
|
|
//No blocking socket
|
|
errorCode = fcntl(sock, F_SETFL, O_NONBLOCK);
|
|
|
|
|
|
int reuse = 1;
|
|
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char*)&reuse, sizeof(reuse)) < 0)
|
|
perror("setsockopt(SO_REUSEADDR) failed");
|
|
|
|
if (setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, (const char*)&reuse, sizeof(reuse)) < 0)
|
|
perror("setsockopt(SO_REUSEPORT) failed");
|
|
|
|
|
|
//Bind socket
|
|
errorCode = bind(sock,(struct sockaddr*) &temp,sizeof(temp));
|
|
|
|
//Number of client allowed
|
|
errorCode = listen(sock, ftpData.ftpParameters.maxClients);
|
|
|
|
return sock;
|
|
}
|
|
|
|
int createPassiveSocket(int port)
|
|
{
|
|
int sock, returnCode, flags;
|
|
struct sockaddr_in temp;
|
|
|
|
//Socket creation
|
|
sock = socket(AF_INET, SOCK_STREAM, 0);
|
|
temp.sin_family = AF_INET;
|
|
temp.sin_addr.s_addr = INADDR_ANY;
|
|
temp.sin_port = htons(port);
|
|
|
|
|
|
|
|
flags = fcntl(sock, F_GETFL, 0);
|
|
flags &= ~O_NONBLOCK;
|
|
returnCode = fcntl(sock, F_SETFL, flags);
|
|
|
|
|
|
int reuse = 1;
|
|
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char*)&reuse, sizeof(reuse)) < 0)
|
|
perror("setsockopt(SO_REUSEADDR) failed");
|
|
|
|
if (setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, (const char*)&reuse, sizeof(reuse)) < 0)
|
|
perror("setsockopt(SO_REUSEPORT) failed");
|
|
|
|
|
|
//Bind socket
|
|
returnCode = bind(sock,(struct sockaddr*) &temp,sizeof(temp));
|
|
|
|
//Number of client allowed
|
|
returnCode = listen(sock, 1);
|
|
|
|
return sock;
|
|
}
|
|
|
|
static void closeSocket(int processingSocket)
|
|
{
|
|
//Close the socket
|
|
close(ftpData.clients[processingSocket].socketDescriptor);
|
|
|
|
resetClientData(&ftpData.clients[processingSocket], 0);
|
|
resetPasvData(&ftpData.clients[processingSocket].pasvData, 0);
|
|
//Update client connecteds
|
|
ftpData.connectedClients--;
|
|
|
|
if (ftpData.connectedClients < 0){
|
|
ftpData.connectedClients = 0;
|
|
}
|
|
printTimeStamp();
|
|
printf("Client id: %d disconnected", processingSocket);
|
|
printf("\nServer: Clients connected:%d", ftpData.connectedClients);
|
|
return;
|
|
}
|
|
|
|
static void initFtpData(void)
|
|
{
|
|
int i;
|
|
ftpData.connectedClients = 0;
|
|
|
|
ftpData.clients = (clientDataType *) malloc( sizeof(clientDataType) * ftpData.ftpParameters.maxClients);
|
|
|
|
ftpData.serverIp.ip[0] = 127;
|
|
ftpData.serverIp.ip[1] = 0;
|
|
ftpData.serverIp.ip[2] = 0;
|
|
ftpData.serverIp.ip[3] = 1;
|
|
|
|
memset(ftpData.welcomeMessage, 0, 1024);
|
|
strcpy(ftpData.welcomeMessage, "220 Hello\r\n");
|
|
|
|
//Client data reset to zero
|
|
for (i = 0; i < ftpData.ftpParameters.maxClients; i++)
|
|
{
|
|
resetPasvData(&ftpData.clients[i].pasvData, 1);
|
|
resetClientData(&ftpData.clients[i], 1);
|
|
ftpData.clients[i].clientProgressiveNumber = i;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static int processCommand(int processingElement)
|
|
{
|
|
int toReturn = 0;
|
|
printTimeStamp();
|
|
printf ("Command received from (%d): %s", processingElement, ftpData.clients[processingElement].theCommandReceived);
|
|
|
|
|
|
//printf ("\nstrncmp(ftpData.clients[processingElement].theCommandReceived, \"USER\", strlen(\"USER\")) %d", strncmp(ftpData.clients[processingElement].theCommandReceived, "USER", strlen("USER")));
|
|
//printf ("\nstrncmp(ftpData.clients[processingElement].theCommandReceived, \"user\", strlen(\"user\")) %d", strncmp(ftpData.clients[processingElement].theCommandReceived, "user", strlen("user")));
|
|
//printf ("\nstrncmp(ftpData.clients[processingElement].theCommandReceived, \"PASS\", strlen(\"PASS\")) %d", strncmp(ftpData.clients[processingElement].theCommandReceived, "PASS", strlen("PASS")));
|
|
//printf ("\nstrncmp(ftpData.clients[processingElement].theCommandReceived, \"pass\", strlen(\"pass\")) %d", strncmp(ftpData.clients[processingElement].theCommandReceived, "pass", strlen("pass")));
|
|
|
|
if (ftpData.clients[processingElement].login.userLoggedIn == 0 &&
|
|
(strncmp(ftpData.clients[processingElement].theCommandReceived, "USER", strlen("USER")) != 0 &&
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "user", strlen("user")) != 0 &&
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "PASS", strlen("PASS")) != 0 &&
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "pass", strlen("pass")) != 0))
|
|
{
|
|
toReturn = notLoggedInMessage(&ftpData.clients[processingElement]);
|
|
return 1;
|
|
}
|
|
|
|
|
|
//Process Command
|
|
if(strncmp(ftpData.clients[processingElement].theCommandReceived, "USER", strlen("USER")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "user", strlen("user")) == 0)
|
|
{
|
|
printf("\nUSER COMMAND RECEIVED");
|
|
toReturn = parseCommandUser(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "PASS", strlen("PASS")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "pass", strlen("pass")) == 0)
|
|
{
|
|
printf("\nPASS COMMAND RECEIVED");
|
|
toReturn = parseCommandPass(&ftpData, processingElement);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "AUTH", strlen("AUTH")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "auth", strlen("auth")) == 0)
|
|
{
|
|
printf("\nAUTH COMMAND RECEIVED");
|
|
toReturn = parseCommandAuth(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "PWD", strlen("PWD")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "pwd", strlen("pwd")) == 0)
|
|
{
|
|
printf("\nPWD COMMAND RECEIVED");
|
|
toReturn = parseCommandPwd(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "SYST", strlen("SYST")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "syst", strlen("syst")) == 0)
|
|
{
|
|
printf("\nSYST COMMAND RECEIVED");
|
|
toReturn = parseCommandSyst(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "FEAT", strlen("FEAT")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "feat", strlen("feat")) == 0)
|
|
{
|
|
printf("\nFEAT COMMAND RECEIVED");
|
|
toReturn = parseCommandFeat(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "TYPE I", strlen("TYPE I")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "type i", strlen("type i")) == 0)
|
|
{
|
|
printf("\nTYPE I COMMAND RECEIVED");
|
|
toReturn = parseCommandTypeI(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "PASV", strlen("PASV")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "pasv", strlen("pasv")) == 0)
|
|
{
|
|
printf("\nPASV COMMAND RECEIVED");
|
|
setRandomicPort(&ftpData, processingElement);
|
|
toReturn = parseCommandPasv(&ftpData, processingElement);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "LIST", strlen("LIST")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "list", strlen("list")) == 0)
|
|
{
|
|
printf("\nLIST COMMAND RECEIVED");
|
|
toReturn = parseCommandList(&ftpData, processingElement);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "CWD", strlen("CWD")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "cwd", strlen("cwd")) == 0)
|
|
{
|
|
printf("\nCWD COMMAND RECEIVED");
|
|
toReturn = parseCommandCwd(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "CDUP", strlen("CDUP")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "cdup", strlen("cdup")) == 0)
|
|
{
|
|
printf("\nCDUP COMMAND RECEIVED");
|
|
toReturn = parseCommandCdup(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "REST", strlen("REST")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "rest", strlen("rest")) == 0)
|
|
{
|
|
printf("\nREST COMMAND RECEIVED");
|
|
toReturn = parseCommandRest(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "RETR", strlen("RETR")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "retr", strlen("retr")) == 0)
|
|
{
|
|
printf("\nRETR COMMAND RECEIVED");
|
|
toReturn = parseCommandRetr(&ftpData, processingElement);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "STOR", strlen("STOR")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "stor", strlen("stor")) == 0)
|
|
{
|
|
printf("\nSTOR COMMAND RECEIVED");
|
|
toReturn = parseCommandStor(&ftpData, processingElement);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "MKD", strlen("MKD")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "mkd", strlen("mkd")) == 0)
|
|
{
|
|
printf("\nMKD command received");
|
|
toReturn = parseCommandMkd(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "ABOR", strlen("ABOR")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "abor", strlen("abor")) == 0)
|
|
{
|
|
printf("\nABOR command received");
|
|
toReturn = parseCommandAbor(&ftpData, processingElement);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "DELE", strlen("DELE")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "dele", strlen("dele")) == 0)
|
|
{
|
|
printf("\nDELE command received");
|
|
toReturn = parseCommandDele(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "MTDM", strlen("MTDM")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "mtdm", strlen("mtdm")) == 0)
|
|
{
|
|
printf("\nMTDM command received");
|
|
//To implement
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "NLST", strlen("NLST")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "nlst", strlen("nlst")) == 0)
|
|
{
|
|
printf("\nNLST command received");
|
|
toReturn = parseCommandNlst(&ftpData, processingElement);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "PORT", strlen("PORT")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "port", strlen("port")) == 0)
|
|
{
|
|
printf("\nPORT command received");
|
|
//To implement
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "QUIT", strlen("QUIT")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "quit", strlen("quit")) == 0)
|
|
{
|
|
printf("\nQUIT command received");
|
|
toReturn = parseCommandQuit(&ftpData, processingElement);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "RMD", strlen("RMD")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "rmd", strlen("rmd")) == 0)
|
|
{
|
|
printf("\nRMD command received");
|
|
toReturn = parseCommandRmd(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "RNFR", strlen("RNFR")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "rnfr", strlen("rnfr")) == 0)
|
|
{
|
|
printf("\nRNFR command received");
|
|
toReturn = parseCommandRnfr(&ftpData.clients[processingElement]);
|
|
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "RNTO", strlen("RNTO")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "rnto", strlen("rnto")) == 0)
|
|
{
|
|
printf("\nRNTO command received");
|
|
toReturn = parseCommandRnto(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "SIZE", strlen("SIZE")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "size", strlen("size")) == 0)
|
|
{
|
|
printf("\nSIZE command received");
|
|
toReturn = parseCommandSize(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "APPE", strlen("APPE")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "appe", strlen("appe")) == 0)
|
|
{
|
|
printf("\nAPPE command received");
|
|
//To implement
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "NOOP", strlen("NOOP")) == 0 ||
|
|
strncmp(ftpData.clients[processingElement].theCommandReceived, "noop", strlen("noop")) == 0)
|
|
{
|
|
printf("\nNOOP command received");
|
|
toReturn = parseCommandNoop(&ftpData.clients[processingElement]);
|
|
}
|
|
else
|
|
{
|
|
//Parse unsupported command
|
|
|
|
}
|
|
|
|
ftpData.clients[processingElement].commandIndex = 0;
|
|
memset(ftpData.clients[processingElement].theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE);
|
|
|
|
return toReturn;
|
|
}
|
|
|
|
static int getMaximumSocketFd(int mainSocket, ftpDataType * data)
|
|
{
|
|
int toReturn = mainSocket;
|
|
int i = 0;
|
|
|
|
for (i = 0; i < data->ftpParameters.maxClients; i++)
|
|
{
|
|
if (data->clients[i].socketDescriptor > toReturn) {
|
|
toReturn = data->clients[i].socketDescriptor;
|
|
}
|
|
}
|
|
|
|
return toReturn;
|
|
} |