mirror of
https://github.com/kingk85/uFTP.git
synced 2025-07-15 08:16:14 +03:00
548 lines
20 KiB
C
548 lines
20 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 "fileManagement.h"
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#include "logFunctions.h"
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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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void *pasvThreadHandler(void * socketId)
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{
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int theSocketId = *(int *)socketId;
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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("Pasv connection initialized");
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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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printTimeStamp();
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printf("Pasv waiting..");
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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].socketCommandReceived == 1 &&
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strncmp(ftpData.clients[theSocketId].pasvData.theCommandReceived, "LIST", strlen("LIST")) == 0)
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{
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DYNV_VectorGenericDataType directoryInfo;
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DYNV_VectorGeneric_Init(&directoryInfo);
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//printf("directoryInfo address: %lX", &directoryInfo);
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int i;
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getListDataInfo(ftpData.clients[theSocketId].login.absolutePath.text, &directoryInfo);
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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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break;
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}
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else if (ftpData.clients[theSocketId].socketCommandReceived == 1 &&
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strncmp(ftpData.clients[theSocketId].pasvData.theCommandReceived, "RETR", strlen("RETR")) == 0)
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{
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char theResponse[FTP_COMMAND_ELABORATE_CHAR_BUFFER];
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printTimeStamp();
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printf("The pasvData Command: %s", ftpData.clients[theSocketId].pasvData.theCommandReceived);
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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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char *theFullFileName;
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char *theFullFileContent;
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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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printTimeStamp();
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printf("The File to retrieve is: %s", theFileName);
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theFullFileName = (char *) malloc(ftpData.clients[theSocketId].login.absolutePath.textLen+1);
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strcpy(theFullFileName, ftpData.clients[theSocketId].login.absolutePath.text);
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FILE_AppendToString(&theFullFileName, "/");
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FILE_AppendToString(&theFullFileName, theFileName);
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printTimeStamp();
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printf("The File to retrieve is: %s", theFullFileName);
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int theFileSize = FILE_GetStringFromFile(theFullFileName, &theFullFileContent);
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printTimeStamp();
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printf("The File size is: %d", theFileSize);
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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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write(ftpData.clients[theSocketId].pasvData.passiveSocketConnection, theFullFileContent, theFileSize);
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free(theFullFileName);
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free(theFullFileContent);
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//226-File successfully transferred
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//226 0.013 seconds (measured here), 105.22 Kbytes per second
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memset(theResponse, 0, FTP_COMMAND_ELABORATE_CHAR_BUFFER);
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sprintf(theResponse, "226-File successfully transferred\r\n226 done\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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}
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}
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printTimeStamp();
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printf("Closing 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);
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fflush(0);
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return NULL;
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}
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void runFtpServer(void)
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{
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static int processingSock = 0;
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//Initialize all ftp data
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initFtpData();
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/*
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DYNV_VectorGenericDataType directoryInfo;
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DYNV_VectorGeneric_Init(&directoryInfo);
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printf("\ndirectoryInfo address: %lX", &directoryInfo);
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int i;
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getListDataInfo("/home/ugo", &directoryInfo);
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int theSize = directoryInfo.Size;
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char ** lastToDestroy = NULL;
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directoryInfo.Destroy(&directoryInfo, deleteListDataInfoVector);
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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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//free(lastToDestroy);
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}
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exit(0);
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*/
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//Socket main creator
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ftpData.theSocket = createSocket(SERVER_PORT);
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printTimeStamp();
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printf("uFTP server starting..");
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printf("\n Server: Clients connected: %d", ftpData.connectedClients);
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printf("\nServer: Max Client Allowed: %d", ftpData.maxClients);
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//Endless loop ftp process
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while (1)
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{
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usleep(100000);
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for (processingSock = 0; processingSock < ftpData.maxClients; processingSock++)
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{
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if (ftpData.clients[processingSock].socketIsConnected == 0)
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{
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//Wait for sockets
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if ((ftpData.clients[processingSock].socketDescriptor = accept(ftpData.theSocket,0 ,0 ))!=-1)
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{
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int error;
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ftpData.connectedClients++;
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ftpData.clients[processingSock].socketIsConnected = 1;
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error = fcntl(ftpData.clients[processingSock].socketDescriptor, F_SETFL, O_NONBLOCK);
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printTimeStamp();
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printf("Server: New client connected with id: %d", processingSock);
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printf("\nServer: Clients connected: %d", ftpData.connectedClients);
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write(ftpData.clients[processingSock].socketDescriptor, ftpData.welcomeMessage, strlen(ftpData.welcomeMessage));
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}
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}
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else
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{
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//The client is not connected anymore
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if ((ftpData.clients[processingSock].bufferIndex = read(ftpData.clients[processingSock].socketDescriptor, ftpData.clients[processingSock].buffer, CLIENT_BUFFER_STRING_SIZE)) == 0)
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{
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closeSocket(processingSock);
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}
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//Some commands has been received
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if (ftpData.clients[processingSock].bufferIndex > 0)
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{
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int i = 0;
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int commandProcessStatus = 0;
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for (i = 0; i < ftpData.clients[processingSock].bufferIndex; i++)
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{
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if (ftpData.clients[processingSock].commandIndex < CLIENT_COMMAND_STRING_SIZE)
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{
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if (ftpData.clients[processingSock].buffer[i] != '\r' && ftpData.clients[processingSock].buffer[i] != '\n')
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{
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ftpData.clients[processingSock].theCommandReceived[ftpData.clients[processingSock].commandIndex++] = ftpData.clients[processingSock].buffer[i];
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}
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if (ftpData.clients[processingSock].buffer[i] == '\n')
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{
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ftpData.clients[processingSock].socketCommandReceived = 1;
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commandProcessStatus = processCommand(processingSock);
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//Echo unrecognized commands
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if (commandProcessStatus == 0)
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{
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write(ftpData.clients[processingSock].socketDescriptor, ftpData.clients[processingSock].buffer, ftpData.clients[processingSock].bufferIndex);
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}
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}
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}
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else
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{
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//Command overflow can't be processed
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ftpData.clients[processingSock].commandIndex = 0;
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memset(ftpData.clients[processingSock].theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE);
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//Write some error message to the client
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break;
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}
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}
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usleep(100);
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memset(ftpData.clients[processingSock].buffer, 0, CLIENT_BUFFER_STRING_SIZE);
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}
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}
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}
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}
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//Server Close
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closeSocket(ftpData.theSocket);
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printTimeStamp();
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printf("Server: Closed.");
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ftpData.clients[processingSock].socketIsConnected = 0;
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return;
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}
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/* STATIC FUNCTIONS */
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static int createSocket(int port)
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{
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int sock, errore;
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struct sockaddr_in temp;
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//Socket creation
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sock = socket(AF_INET, SOCK_STREAM, 0);
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temp.sin_family = AF_INET;
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temp.sin_addr.s_addr = INADDR_ANY;
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temp.sin_port = htons(port);
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//No blocking socket
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errore = fcntl(sock, F_SETFL, O_NONBLOCK);
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int reuse = 1;
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if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char*)&reuse, sizeof(reuse)) < 0)
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perror("setsockopt(SO_REUSEADDR) failed");
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if (setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, (const char*)&reuse, sizeof(reuse)) < 0)
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perror("setsockopt(SO_REUSEPORT) failed");
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//Bind socket
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errore = bind(sock,(struct sockaddr*) &temp,sizeof(temp));
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//Number of client allowed
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errore = listen(sock, ftpData.maxClients);
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return sock;
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}
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int createPassiveSocket(int port)
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{
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int sock, errore, flags;
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struct sockaddr_in temp;
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//Socket creation
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sock = socket(AF_INET, SOCK_STREAM, 0);
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temp.sin_family = AF_INET;
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temp.sin_addr.s_addr = INADDR_ANY;
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temp.sin_port = htons(port);
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flags = fcntl(sock, F_GETFL, 0);
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flags &= ~O_NONBLOCK;
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errore = fcntl(sock, F_SETFL, flags);
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int reuse = 1;
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if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char*)&reuse, sizeof(reuse)) < 0)
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perror("setsockopt(SO_REUSEADDR) failed");
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if (setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, (const char*)&reuse, sizeof(reuse)) < 0)
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perror("setsockopt(SO_REUSEPORT) failed");
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//Bind socket
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errore = bind(sock,(struct sockaddr*) &temp,sizeof(temp));
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//Number of client allowed
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errore = listen(sock, 1);
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return sock;
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}
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static void closeSocket(int processingSocket)
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{
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//Close the socket
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close(ftpData.clients[processingSocket].socketDescriptor);
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resetClientData(&ftpData.clients[processingSocket], 0);
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resetPasvData(&ftpData.clients[processingSocket].pasvData);
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//Update client connecteds
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ftpData.connectedClients--;
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if (ftpData.connectedClients < 0){
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ftpData.connectedClients = 0;
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}
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printTimeStamp();
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printf("Client id: %d disconnected", processingSocket);
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printf("\nServer: Clients connected:%d", ftpData.connectedClients);
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return;
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}
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static void initFtpData(void)
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{
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int i;
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ftpData.connectedClients = 0;
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ftpData.maxClients = 10;
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ftpData.clients = (clientDataType *) malloc( sizeof(clientDataType) * ftpData.maxClients);
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ftpData.serverIp.ip[0] = 127;
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ftpData.serverIp.ip[1] = 0;
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ftpData.serverIp.ip[2] = 0;
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ftpData.serverIp.ip[3] = 1;
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memset(ftpData.welcomeMessage, 0, 1024);
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strcpy(ftpData.welcomeMessage, "220 Hello\r\n");
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//Client data reset to zero
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for (i = 0; i < ftpData.maxClients; i++)
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{
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resetPasvData(&ftpData.clients[i].pasvData);
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resetClientData(&ftpData.clients[i], 1);
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}
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return;
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}
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static int processCommand(int processingElement)
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{
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int toReturn = 0;
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printTimeStamp();
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printf ("Command received from (%d): %s", processingElement, ftpData.clients[processingElement].theCommandReceived);
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//Process Command
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if(strncmp(ftpData.clients[processingElement].theCommandReceived, "USER", strlen("USER")) == 0)
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{
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printf("\nUSER COMMAND RECEIVED");
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toReturn = parseCommandUser(&ftpData.clients[processingElement]);
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}
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else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "PASS", strlen("PASS")) == 0)
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{
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printf("\nPASS COMMAND RECEIVED");
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toReturn = parseCommandPass(&ftpData.clients[processingElement]);
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}
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else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "AUTH", strlen("AUTH")) == 0)
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{
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printf("\nAUTH COMMAND RECEIVED");
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toReturn = parseCommandAuth(&ftpData.clients[processingElement]);
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}
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else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "PWD", strlen("PWD")) == 0)
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{
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printf("\nPWD COMMAND RECEIVED");
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toReturn = parseCommandPwd(&ftpData.clients[processingElement]);
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}
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else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "SYST", strlen("SYST")) == 0)
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{
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printf("\nSYST COMMAND RECEIVED");
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toReturn = parseCommandSyst(&ftpData.clients[processingElement]);
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}
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else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "FEAT", strlen("FEAT")) == 0)
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{
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printf("\nSYST COMMAND RECEIVED");
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toReturn = parseCommandFeat(&ftpData.clients[processingElement]);
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}
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else if(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)
|
|
{
|
|
printf("\nPASV COMMAND RECEIVED");
|
|
setRandomicPort(&ftpData, processingElement);
|
|
toReturn = parseCommandPasv(&ftpData, processingElement);
|
|
}
|
|
else if(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)
|
|
{
|
|
printf("\nCWD COMMAND RECEIVED");
|
|
toReturn = parseCommandCwd(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(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)
|
|
{
|
|
printf("\nREST COMMAND RECEIVED");
|
|
toReturn = parseCommandRest(&ftpData.clients[processingElement]);
|
|
}
|
|
else if(strncmp(ftpData.clients[processingElement].theCommandReceived, "RETR", strlen("RETR")) == 0)
|
|
{
|
|
printf("\nRETR COMMAND RECEIVED");
|
|
toReturn = parseCommandRetr(&ftpData, processingElement);
|
|
}
|
|
|
|
//REST COMMAND
|
|
//REST 0
|
|
//350 Restarting at 0
|
|
|
|
//RETR info.php
|
|
//150 Accepted data connection
|
|
//226-File successfully transferred
|
|
//226 0.013 seconds (measured here), 105.22 Kbytes per second
|
|
|
|
|
|
//227 Entering Passive Mode (192,185,16,65,182,64)
|
|
//STOR testUgo.txt
|
|
//150 Accepted data connection
|
|
//226-File successfully transferred
|
|
//226 21.350 seconds (measured here), 3.33 bytes per second
|
|
|
|
ftpData.clients[processingElement].commandIndex = 0;
|
|
memset(ftpData.clients[processingElement].theCommandReceived, 0, CLIENT_COMMAND_STRING_SIZE);
|
|
|
|
return toReturn;
|
|
}
|
|
|