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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
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 3 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, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
#include "plCreatableIndex.h"
#include "plNetClientMsgScreener.h"
#include "plNetLinkingMgr.h"
#include "pfMessage/pfKIMsg.h"
#include "pnNetCommon/plNetApp.h"
#include "pnMessage/plMessage.h"
#include "plStatusLog/plStatusLog.h"
#include "plAvatar/plAvatarMgr.h"
#include "plAvatar/plArmatureMod.h"
///////////////////////////////////////////////////////////////
// CLIENT Version
///////////////////////////////////////////////////////////////
plNetClientMsgScreener::plNetClientMsgScreener()
{
DebugMsg("created");
}
//
// For plLoggable base
//
void plNetClientMsgScreener::ICreateStatusLog() const
{
fStatusLog = plStatusLogMgr::GetInstance().CreateStatusLog(40, "NetScreener.log",
plStatusLog::kTimestamp | plStatusLog::kFilledBackground | plStatusLog::kAlignToTop);
}
//
// return cur age name
//
const char* plNetClientMsgScreener::IGetAgeName() const
{
plNetLinkingMgr *lm = plNetLinkingMgr::GetInstance();
return lm && lm->GetAgeLink()->GetAgeInfo() ? lm->GetAgeLink()->GetAgeInfo()->GetAgeFilename() : "?";
}
//
// Check if key is local avatar
//
bool plNetClientMsgScreener::IIsLocalAvatarKey(plKey key, const plNetGameMember* gm) const
{
return (!key || key==plNetClientApp::GetInstance()->GetLocalPlayerKey());
}
bool plNetClientMsgScreener::IIsLocalArmatureModKey(plKey key, const plNetGameMember* gm) const
{
plKey playerKey = plNetClientApp::GetInstance()->GetLocalPlayerKey();
plArmatureMod* aMod = playerKey ? plAvatarMgr::GetInstance()->FindAvatar(playerKey) : nil;
return (!key || key==(aMod ? aMod->GetKey() : nil));
}
//
// Check if CCR
//
bool plNetClientMsgScreener::IIsSenderCCR(const plNetGameMember* gm) const
{
return plNetClientApp::GetInstance()->AmCCR();
}
//
// return true if msg is allowed/accepted as a net msg
//
bool plNetClientMsgScreener::AllowOutgoingMessage(const plMessage* msg) const
{
if (!msg)
return false;
Answer ans=IAllowMessageType(msg->ClassIndex());
if (ans==kYes)
return true;
if (ans==kNo)
{
WarningMsg("Rejected: (Outgoing) %s [Illegal Message]", msg->ClassName());
return false;
}
if (!IValidateMessage(msg))
{
WarningMsg("Rejected: (Outgoing) %s [Validation Failed]", msg->ClassName());
return false;
}
return true;
}
//
// Return false for obvious hacked network messages
// This is all because we cannot trust Cyan's servers
//
bool plNetClientMsgScreener::AllowIncomingMessage(const plMessage* msg) const
{
if (!msg)
return false;
bool result = IScreenIncoming(msg);
if (!result)
WarningMsg("Rejected: (Incoming) %s", msg->ClassName());
return result;
}
bool plNetClientMsgScreener::IScreenIncoming(const plMessage* msg) const
{
// Why would you EVER send a RefMsg accross the network???
if (plFactory::DerivesFrom(CLASS_INDEX_SCOPED(plRefMsg), msg->ClassIndex()))
return false;
// Blacklist some obvious hacks here...
switch (msg->ClassIndex())
{
case CLASS_INDEX_SCOPED(plAudioSysMsg):
// This message has a flawed read/write
return false;
case CLASS_INDEX_SCOPED(plConsoleMsg):
// Python remote code execution vunerability
return false;
case CLASS_INDEX_SCOPED(pfKIMsg):
{
// Only accept Chat Messages!
const pfKIMsg* ki = pfKIMsg::ConvertNoRef(msg);
if (ki->GetCommand() != pfKIMsg::kHACKChatMsg)
return false;
return true;
}
default:
// Default allow everything else, otherweise we
// might break something that we really shouldn't...
return true;
}
}