CWE-ou-minkata/Sources/Plasma/PubUtilLib/plNetCommon/plNetMsgScreener.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

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*==LICENSE==*/
#include "hsTypes.h"
#include "plNetMsgScreener.h"
#include "plCreatableIndex.h"

#include "pnNetCommon/plNetApp.h"
#include "pnMessage/plNotifyMsg.h"
#include "pnMessage/plEnableMsg.h"
#include "pnMessage/plSetNetGroupIDMsg.h"
#include "pnInputCore/plControlEventCodes.h"

#include "plMessage/plCCRMsg.h"
#include "plMessage/plLinkToAgeMsg.h"
#include "plMessage/plAvatarMsg.h"
#include "plMessage/plInputIfaceMgrMsg.h"
#include "plMessage/plInputEventMsg.h"
#include "plMessage/plAnimCmdMsg.h"
#include "plMessage/plBulletMsg.h"
#include "plMessage/plAvCoopMsg.h"
#include "plMessage/plParticleUpdateMsg.h"

#include "pfMessage/pfKIMsg.h"		
#include "pfMessage/plClothingMsg.h"	

//
// say why the msg got rejected
//
void plNetMsgScreener::IRejectLogMsg(Int16 classIndex, const char* desc, const plNetGameMember* gm) const
{
	DebugMsg("Message %s was rejected, reason:%s, age:%s, client:%s", 
		plFactory::GetNameOfClass(classIndex), desc, IGetAgeName(), IGetSenderName(gm));
}

//
// say why the msg got rejected
//
void plNetMsgScreener::IRejectLogMsg(const plMessage* msg, const char* desc, const plNetGameMember* gm) const
{
	const char* senderName = msg->GetSender() ? msg->GetSender()->GetUoid().GetObjectName() : "?";
	const char* rcvrName = msg->GetNumReceivers() && msg->GetReceiver(0) ? msg->GetReceiver(0)->GetUoid().GetObjectName() : "?";

	DebugMsg("Message %s was rejected, reason:%s, age:%s, client:%s, msgSndr:%s, msgRcvr:%s", 
		msg->ClassName(), desc, IGetAgeName(), IGetSenderName(gm),
		senderName,	rcvrName);
}

//
// Try to accept/reject quickly
// the netMsg arg has been peeked except for the stream
//
plNetMsgScreener::Answer plNetMsgScreener::IAllowMessageType(Int16 classIndex, const plNetGameMember* gm) const
{
	// Check based on baseclass
	if (plFactory::DerivesFrom(plCCRMessage::Index(), classIndex))
	{
		ILogCCRMessage(classIndex, gm);
		Answer ans=IIsSenderCCR(gm) ? kYes : kNo;
		if (ans==kNo)
		{
			IRejectLogMsg(classIndex, "Not a CCR", gm);
		}
		return ans;
	}
	
	// Check based on exact type
	switch(classIndex)
	{
		// these are wrapped in their own net msg, so the client will see them this way, but not the server
		// that's why they check IAmClient() - this is a special case
	case CLASS_INDEX_SCOPED(plLoadAvatarMsg):
	case CLASS_INDEX_SCOPED(plLoadCloneMsg):
		{
			Answer ans=IAmClient() ? kYes : kNo;
			if (ans==kNo)
			{
				IRejectLogMsg(classIndex, "Only seen in native form on client", gm);
			}
			return ans;
		}		
		
		// definitely yes
	case CLASS_INDEX_SCOPED(pfMarkerMsg):
	case CLASS_INDEX_SCOPED(plBulletMsg):
	case CLASS_INDEX_SCOPED(plNotifyMsg):
	case CLASS_INDEX_SCOPED(plSetNetGroupIDMsg):
	case CLASS_INDEX_SCOPED(plAvCoopMsg):
	case CLASS_INDEX_SCOPED(plClothingMsg):
	case CLASS_INDEX_SCOPED(plEnableMsg):
	case CLASS_INDEX_SCOPED(plLinkToAgeMsg):
		return kYes;
		
		// definitely yes or no (based on whether sender is a CCR)
	case CLASS_INDEX_SCOPED(plWarpMsg):
		{
			Answer ans=IIsSenderCCR(gm) ? kYes : kNo;
			if (ans==kNo)
			{
				IRejectLogMsg(classIndex, "Not a CCR", gm);
			}
			return ans;
		}
		
		// conditionally yes, requires further validation of msg contents
	case CLASS_INDEX_SCOPED(plAnimCmdMsg):
	case CLASS_INDEX_SCOPED(pfKIMsg):
	case CLASS_INDEX_SCOPED(plAvTaskMsg):
	case CLASS_INDEX_SCOPED(plLinkEffectsTriggerMsg):
	case CLASS_INDEX_SCOPED(plInputIfaceMgrMsg):
	case CLASS_INDEX_SCOPED(plParticleKillMsg):
	case CLASS_INDEX_SCOPED(plParticleTransferMsg):
	case CLASS_INDEX_SCOPED(plAvatarInputStateMsg):
	case CLASS_INDEX_SCOPED(plAvBrainGenericMsg):
	case CLASS_INDEX_SCOPED(plMultistageModMsg):
		return kMaybe;
		
		// definitely no
	default:
		IRejectLogMsg(classIndex, "Illegal msg class", gm);
		return kNo;
	}
}

//
// Message may be allowed if contents or conditions are met
//
bool plNetMsgScreener::IValidateMessage(const plMessage* msg, const plNetGameMember* gm) const
{
	if (!msg)
		return true;

	switch(msg->ClassIndex())
	{
		// Only chat KI msgs are allowed.
		// Admin/system-wide chat msgs are only allowed by CCRs
	case CLASS_INDEX_SCOPED(pfKIMsg):
		{
			const pfKIMsg* km = pfKIMsg::ConvertNoRef(msg);
			if (km->GetCommand() != pfKIMsg::kHACKChatMsg)
			{
				IRejectLogMsg(msg, "Non-chat KI msg", gm);
				return false;
			}

			ILogChatMessage(msg, gm);
			if (km->GetFlags() & pfKIMsg::kAdminMsg)
			{
				if (!IIsSenderCCR(gm))
				{
					IRejectLogMsg(msg, "Must be a CCR to send an Admin KI msg", gm);
					return false;
				}
			}
			return true;
		}
		break;
		
		// Allowed for local avatar
	case CLASS_INDEX_SCOPED(plAvTaskMsg):
	case CLASS_INDEX_SCOPED(plAvatarInputStateMsg):
	case CLASS_INDEX_SCOPED(plAvBrainGenericMsg):
	case CLASS_INDEX_SCOPED(plMultistageModMsg):
		{
			bool ret=IIsLocalArmatureModKey(msg->GetReceiver(0), gm);
			if (!ret)
			{
				IRejectLogMsg(msg, "msg must refer to local avatar", gm);
			}
			return ret;
		}

		// Allowed for local avatar
	case CLASS_INDEX_SCOPED(plLinkEffectsTriggerMsg):
		{
			const plLinkEffectsTriggerMsg* linkMsg = plLinkEffectsTriggerMsg::ConvertNoRef(msg);
			bool ret=IIsLocalAvatarKey(linkMsg->GetLinkKey(), gm);
			if (!ret)
			{
				IRejectLogMsg(msg, "msg must refer to local avatar", gm);
			}
			return ret;
		}

		// Allowed for local avatar
	case CLASS_INDEX_SCOPED(plInputIfaceMgrMsg):
		{
			const plInputIfaceMgrMsg* iMsg = plInputIfaceMgrMsg::ConvertNoRef(msg);
			bool ret=IIsLocalAvatarKey(iMsg->GetAvKey(), gm);
			if (!ret)
			{
				IRejectLogMsg(msg, "msg must refer to local avatar", gm);
			}
			return ret;
		}
		break;
	
	case CLASS_INDEX_SCOPED(plParticleKillMsg):
	case CLASS_INDEX_SCOPED(plParticleTransferMsg):
		{
			bool ret = IIsLocalAvatarKey(msg->GetReceiver(0), gm);
			if (!ret)
			{
				IRejectLogMsg(msg, "msg must refer to local avatar", gm);
			}
			return ret;
		}	
		break;

	case CLASS_INDEX_SCOPED(plAnimCmdMsg):
		{
			const plAnimCmdMsg *animMsg = plAnimCmdMsg::ConvertNoRef(msg);
			bool ret = (animMsg->GetNumCallbacks() == 0);
			if (!ret)
			{
				IRejectLogMsg(msg, "msg has callbacks", gm);
			}
			return ret;
		}
		break;
	default:
		return false;
	}

}