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qBittorrent/src/filterparserthread.h

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/*
* Bittorrent Client using Qt4 and libtorrent.
* Copyright (C) 2006 Christophe Dumez
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* In addition, as a special exception, the copyright holders give permission to
* link this program with the OpenSSL project's "OpenSSL" library (or with
* modified versions of it that use the same license as the "OpenSSL" library),
* and distribute the linked executables. You must obey the GNU General Public
* License in all respects for all of the code used other than "OpenSSL". If you
* modify file(s), you may extend this exception to your version of the file(s),
* but you are not obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* Contact : chris@qbittorrent.org
*/
#ifndef FILTERPARSERTHREAD_H
#define FILTERPARSERTHREAD_H
#include <QThread>
#include <QFile>
#include <QDataStream>
#include <QRegExp>
#include <QStringList>
#include <libtorrent/session.hpp>
#include <libtorrent/ip_filter.hpp>
using namespace libtorrent;
using namespace std;
// P2B Stuff
#include <string.h>
#ifdef Q_WS_WIN
#include <Winsock2.h>
#else
#include <arpa/inet.h>
#endif
// End of P2B stuff
class FilterParserThread : public QThread {
Q_OBJECT
private:
session *s;
ip_filter filter;
bool abort;
QString filePath;
protected:
void run(){
qDebug("Processing filter file");
if(filePath.endsWith(".dat", Qt::CaseInsensitive)) {
// eMule DAT file
parseDATFilterFile(filePath);
} else {
if(filePath.endsWith(".p2p", Qt::CaseInsensitive)) {
// PeerGuardian p2p file
parseP2PFilterFile(filePath);
} else {
if(filePath.endsWith(".p2b", Qt::CaseInsensitive)) {
// PeerGuardian p2b file
parseP2BFilterFile(filePath);
} else {
// Default: eMule DAT format
parseDATFilterFile(filePath);
}
}
}
s->set_ip_filter(filter);
qDebug("IP Filter thread: finished parsing, filter applied");
}
public:
FilterParserThread(QObject* parent, session *s) : QThread(parent), s(s), abort(false) {
}
~FilterParserThread(){
abort = true;
wait();
}
// Parser for eMule ip filter in DAT format
void parseDATFilterFile(QString filePath) {
const QRegExp is_ipv6(QString::fromUtf8("^[0-9a-f]{4}(:[0-9a-f]{4}){7}$"), Qt::CaseInsensitive, QRegExp::RegExp);
const QRegExp is_ipv4(QString::fromUtf8("^(([0-1]?[0-9]?[0-9])|(2[0-4][0-9])|(25[0-5]))(\\.(([0-1]?[0-9]?[0-9])|(2[0-4][0-9])|(25[0-5]))){3}$"), Qt::CaseInsensitive, QRegExp::RegExp);
QString strStartIP, strEndIP;
bool IPv4 = true;
QFile file(filePath);
if (file.exists()){
if(!file.open(QIODevice::ReadOnly | QIODevice::Text)){
std::cerr << "I/O Error: Could not open ip filer file in read mode." << std::endl;
return;
}
unsigned int nbLine = 0;
while (!file.atEnd() && !abort) {
++nbLine;
QByteArray line = file.readLine();
// Ignoring empty lines
line = line.trimmed();
if(line.isEmpty()) continue;
// Ignoring commented lines
if(line.startsWith('#') || line.startsWith("//")) continue;
// Line is not commented
QList<QByteArray> partsList = line.split(',');
unsigned int nbElem = partsList.size();
// IP Range can be splitted by a dash or a comma...
// Check if there is a dash in first part
QByteArray firstPart = partsList.at(0);
int nbAccess = 0;
if(firstPart.contains('-')) {
// Range is splitted by a dash
QList<QByteArray> IPs = firstPart.split('-');
if(IPs.size() != 2) {
qDebug("Ipfilter.dat: line %d is malformed.", nbLine);
continue;
}
strStartIP = IPs.at(0).trimmed();
strEndIP = IPs.at(1).trimmed();
// Check if IPs are correct
if(strStartIP.contains(is_ipv4) && strEndIP.contains(is_ipv4)) {
IPv4 = true;
} else {
if(strStartIP.contains(is_ipv6) && strEndIP.contains(is_ipv6)) {
IPv4 = false;
} else {
// Could not determine IP format
qDebug("Ipfilter.dat: line %d is malformed.", nbLine);
continue;
}
}
// Check if there is an access value (apparently not mandatory)
if(nbElem > 1) {
// There is possibly one
bool ok;
nbAccess = partsList.at(1).trimmed().toInt(&ok);
if(!ok){
nbAccess = 0;
}
}
} else {
// Range is probably splitted by a comma
unsigned int nbElem = partsList.size();
if(nbElem > 1) {
strStartIP = firstPart.trimmed();
strEndIP = partsList.at(1).trimmed();
// Check if IPs are correct
if(strStartIP.contains(is_ipv4) && strEndIP.contains(is_ipv4)) {
IPv4 = true;
} else {
if(strStartIP.contains(is_ipv6) && strEndIP.contains(is_ipv6)) {
IPv4 = false;
} else {
// Could not determine IP format
qDebug("Ipfilter.dat: line %d is malformed.", nbLine);
continue;
}
}
// Check if there is an access value (apparently not mandatory)
if(nbElem > 2) {
// There is possibly one
bool ok;
nbAccess = partsList.at(2).trimmed().toInt(&ok);
if(!ok){
nbAccess = 0;
}
}
}
}
if(nbAccess > 127) {
// Ignoring this rule because access value is too high
continue;
}
// Now Add to the filter
QStringList IP;
try {
if(IPv4) {
//IPv4 addresses
IP = strStartIP.split('.');
if(IP.size() != 4)
throw exception();
address_v4 start((IP.at(0).toUInt() << 24) + (IP.at(1).toUInt() << 16) + (IP.at(2).toUInt() << 8) + IP.at(3).toUInt());
IP = strEndIP.split('.');
if(IP.size() != 4)
throw exception();
address_v4 last((IP.at(0).toUInt() << 24) + (IP.at(1).toUInt() << 16) + (IP.at(2).toUInt() << 8) + IP.at(3).toUInt());
// Apply to bittorrent session
filter.add_rule(start, last, ip_filter::blocked);
} else {
// IPv6, ex : 1fff:0000:0a88:85a3:0000:0000:ac1f:8001
IP = strStartIP.split(':');
address_v6 start = address_v6::from_string(strStartIP.remove(':', 0).toLocal8Bit().data());
IP = strEndIP.split(':');
address_v6 last = address_v6::from_string(strEndIP.remove(':', 0).toLocal8Bit().data());
// Apply to bittorrent session
filter.add_rule(start, last, ip_filter::blocked);
}
}catch(exception){
qDebug("Bad line in filter file, avoided crash...");
}
}
file.close();
}
}
// Parser for PeerGuardian ip filter in p2p format
void parseP2PFilterFile(QString filePath) {
const QRegExp is_ipv4(QString::fromUtf8("^(([0-1]?[0-9]?[0-9])|(2[0-4][0-9])|(25[0-5]))(\\.(([0-1]?[0-9]?[0-9])|(2[0-4][0-9])|(25[0-5]))){3}$"), Qt::CaseInsensitive, QRegExp::RegExp);
QFile file(filePath);
QStringList IP;
if (file.exists()){
if(!file.open(QIODevice::ReadOnly | QIODevice::Text)){
std::cerr << "I/O Error: Could not open ip filer file in read mode." << std::endl;
return;
}
unsigned int nbLine = 0;
while (!file.atEnd() && !abort) {
++nbLine;
QByteArray line = file.readLine();
// Ignoring empty lines
line = line.trimmed();
if(line.isEmpty()) continue;
// Ignoring commented lines
if(line.startsWith('#') || line.startsWith("//")) continue;
// Line is not commented
QList<QByteArray> partsList = line.split(':');
if(partsList.size() < 2){
qDebug("p2p file: line %d is malformed.", nbLine);
continue;
}
// Get IP range
QList<QByteArray> IPs = partsList.last().split('-');
if(IPs.size() != 2) {
qDebug("p2p file: line %d is malformed.", nbLine);
continue;
}
QString strStartIP = IPs.at(0).trimmed();
QString strEndIP = IPs.at(1).trimmed();
// Check IPs format (IPv4 only)
if(strStartIP.contains(is_ipv4) && strEndIP.contains(is_ipv4)) {
// IPv4
IP = strStartIP.split('.');
address_v4 start((IP.at(0).toUInt() << 24) + (IP.at(1).toUInt() << 16) + (IP.at(2).toUInt() << 8) + IP.at(3).toUInt());
IP = strEndIP.split('.');
address_v4 last((IP.at(0).toUInt() << 24) + (IP.at(1).toUInt() << 16) + (IP.at(2).toUInt() << 8) + IP.at(3).toUInt());
// Apply to bittorrent session
filter.add_rule(start, last, ip_filter::blocked);
} else {
qDebug("p2p file: line %d is malformed.", nbLine);
continue;
}
}
file.close();
}
}
int getlineInStream(QDataStream& stream, string& name, char delim) {
char c;
int total_read = 0;
int read;
do {
read = stream.readRawData(&c, 1);
total_read += read;
if(read > 0) {
if(c != delim) {
name += c;
} else {
// Delim found
return total_read;
}
}
} while(read > 0);
return total_read;
}
// Parser for PeerGuardian ip filter in p2p format
void parseP2BFilterFile(QString filePath) {
QFile file(filePath);
if (file.exists()){
if(!file.open(QIODevice::ReadOnly)){
std::cerr << "I/O Error: Could not open ip filer file in read mode." << std::endl;
return;
}
QDataStream stream(&file);
// Read header
char buf[7];
unsigned char version;
if(
!stream.readRawData(buf, sizeof(buf)) ||
memcmp(buf, "\xFF\xFF\xFF\xFFP2B", 7) ||
!stream.readRawData((char*)&version, sizeof(version))
) {
std::cerr << "Parsing Error: The filter file is not a valid PeerGuardian P2B file." << std::endl;
return;
}
if(version==1 || version==2) {
qDebug ("p2b version 1 or 2");
unsigned int start, end;
string name;
while(getlineInStream(stream, name, '\0') && !abort) {
if(
!stream.readRawData((char*)&start, sizeof(start)) ||
!stream.readRawData((char*)&end, sizeof(end))
) {
std::cerr << "Parsing Error: The filter file is not a valid PeerGuardian P2B file." << std::endl;
return;
}
// Network byte order to Host byte order
// asio address_v4 contructor expects it
// that way
address_v4 first(ntohl(start));
address_v4 last(ntohl(end));
// Apply to bittorrent session
filter.add_rule(first, last, ip_filter::blocked);
}
}
else if(version==3) {
qDebug ("p2b version 3");
unsigned int namecount;
if(!stream.readRawData((char*)&namecount, sizeof(namecount))) {
std::cerr << "Parsing Error: The filter file is not a valid PeerGuardian P2B file." << std::endl;
return;
}
namecount=ntohl(namecount);
// Reading names although, we don't really care about them
for(unsigned int i=0; i<namecount; i++) {
string name;
if(!getlineInStream(stream, name, '\0')) {
std::cerr << "Parsing Error: The filter file is not a valid PeerGuardian P2B file." << std::endl;
return;
}
if(abort) return;
}
// Reading the ranges
unsigned int rangecount;
if(!stream.readRawData((char*)&rangecount, sizeof(rangecount))) {
std::cerr << "Parsing Error: The filter file is not a valid PeerGuardian P2B file." << std::endl;
return;
}
rangecount=ntohl(rangecount);
unsigned int name, start, end;
for(unsigned int i=0; i<rangecount; i++) {
if(
!stream.readRawData((char*)&name, sizeof(name)) ||
!stream.readRawData((char*)&start, sizeof(start)) ||
!stream.readRawData((char*)&end, sizeof(end))
) {
std::cerr << "Parsing Error: The filter file is not a valid PeerGuardian P2B file." << std::endl;
return;
}
// Network byte order to Host byte order
// asio address_v4 contructor expects it
// that way
address_v4 first(ntohl(start));
address_v4 last(ntohl(end));
// Apply to bittorrent session
filter.add_rule(first, last, ip_filter::blocked);
if(abort) return;
}
} else {
std::cerr << "Parsing Error: The filter file is not a valid PeerGuardian P2B file." << std::endl;
return;
}
file.close();
}
}
// Process ip filter file
// Supported formats:
// * eMule IP list (DAT): http://wiki.phoenixlabs.org/wiki/DAT_Format
// * PeerGuardian Text (P2P): http://wiki.phoenixlabs.org/wiki/P2P_Format
// * PeerGuardian Binary (P2B): http://wiki.phoenixlabs.org/wiki/P2B_Format
void processFilterFile(QString _filePath){
// First, import current filter
filter = s->get_ip_filter();
if(isRunning()) {
// Already parsing a filter, abort first
abort = true;
wait();
}
abort = false;
filePath = _filePath;
// Run it
start();
}
static void processFilterList(session *s, QStringList IPs) {
// First, import current filter
ip_filter filter = s->get_ip_filter();
foreach(const QString &ip, IPs) {
qDebug("Manual ban of peer %s", ip.toLocal8Bit().data());
address_v4 addr = address_v4::from_string(ip.toLocal8Bit().data());
filter.add_rule(addr, addr, ip_filter::blocked);
}
s->set_ip_filter(filter);
}
};
#endif