[trevius]

Here is the function that handles the targeting stuff:

client_packet.cpp

void Client::Handle_OP_TargetCommand(const EQApplicationPacket *app)
{
	if (app->size != sizeof(ClientTarget_Struct)) {
		LogFile->write(EQEMuLog::Error, "OP size error: OP_TargetMouse expected:%i got:%i", sizeof(ClientTarget_Struct), app->size);
		return;
	}

	if(GetTarget())
	{
		GetTarget()->IsTargeted(-1);
	}

	// Locate and cache new target
	ClientTarget_Struct* ct=(ClientTarget_Struct*)app->pBuffer;
	pClientSideTarget = ct->new_target;
	if(!IsAIControlled())
	{
		Mob *new_target = entity_list.GetMob(ct->new_target);
		if(new_target)
		{
			SetTarget(new_target);
		}
		else
		{
			SetTarget(NULL);
			SetHoTT(0);
			return;
		}
	}
	else
	{
		SetTarget(NULL);
		SetHoTT(0);
		return;
	}

	// <Rogean> HoTT
	if (GetTarget() && GetTarget()->GetTarget()) 
		SetHoTT(GetTarget()->GetTarget()->GetID());
	else 
		SetHoTT(0);

	Group *g = GetGroup();

	if(g && g->IsMainAssist(this))
		g->SetGroupTarget(ct->new_target);

	// For /target, send reject or success packet
	if (app->GetOpcode() == OP_TargetCommand) {
		if (GetTarget() && !GetTarget()->CastToMob()->IsInvisible(this) && DistNoRoot(*GetTarget()) <= TARGETING_RANGE*TARGETING_RANGE) {
			if(GetTarget()->GetBodyType() == BT_NoTarget2 || GetTarget()->GetBodyType() == BT_Special 
				|| GetTarget()->GetBodyType() == BT_NoTarget)
			{
				//Targeting something we shouldn't with /target
				//but the client allows this without MQ so you don't flag it
				EQApplicationPacket* outapp = new EQApplicationPacket(OP_TargetReject, sizeof(TargetReject_Struct));
				outapp->pBuffer[0] = 0x2f;
				outapp->pBuffer[1] = 0x01;
				outapp->pBuffer[4] = 0x0d;
				if(GetTarget())
				{
					SetTarget(NULL);
				}
				QueuePacket(outapp);
				safe_delete(outapp);
				return;
			}
			
			QueuePacket(app);
			EQApplicationPacket hp_app;
			GetTarget()->IsTargeted(1);
			GetTarget()->CreateHPPacket(&hp_app);
			QueuePacket(&hp_app, false);
		} 
		else 
		{
			EQApplicationPacket* outapp = new EQApplicationPacket(OP_TargetReject, sizeof(TargetReject_Struct));
			outapp->pBuffer[0] = 0x2f;
			outapp->pBuffer[1] = 0x01;
			outapp->pBuffer[4] = 0x0d;
			if(GetTarget())
			{
				SetTarget(NULL);
			}
			QueuePacket(outapp);
			safe_delete(outapp);
		}
	}
	else
	{
		if(GetTarget())
		{
			if(GetGM())
			{
				GetTarget()->IsTargeted(1);
				return;
			}
			else if(GetTarget()->IsClient())
			{
				//make sure this client is in our raid/group
				GetTarget()->IsTargeted(1);
				return;
			}
			else if(GetTarget()->GetBodyType() == BT_NoTarget2 || GetTarget()->GetBodyType() == BT_Special 
				|| GetTarget()->GetBodyType() == BT_NoTarget)
			{
				char *hacker_str = NULL;
				MakeAnyLenString(&hacker_str, "%s attempting to target something untargetable, %s bodytype: %i\n",
					GetName(), GetTarget()->GetName(), (int)GetTarget()->GetBodyType());
				database.SetMQDetectionFlag(AccountName(), GetName(), hacker_str, zone->GetShortName());
				safe_delete_array(hacker_str);
				SetTarget((Mob*)NULL);
				return;
			}
			else if(IsPortExempted())
			{
				GetTarget()->IsTargeted(1);
				return;
			}
			else if(IsSenseExempted())
			{
				GetTarget()->IsTargeted(1);
				SetSenseExemption(false);
				return;
			}
			else if(GetBindSightTarget())
			{
				if(GetBindSightTarget()->DistNoRoot(*GetTarget()) > (zone->newzone_data.maxclip*zone->newzone_data.maxclip))
				{
					if(DistNoRoot(*GetTarget()) > (zone->newzone_data.maxclip*zone->newzone_data.maxclip))
					{
						char *hacker_str = NULL;
						MakeAnyLenString(&hacker_str, "%s attempting to target something beyond the clip plane of %.2f units,"
							" from (%.2f, %.2f, %.2f) to %s (%.2f, %.2f, %.2f)", GetName(),
							(zone->newzone_data.maxclip*zone->newzone_data.maxclip),
							GetX(), GetY(), GetZ(), GetTarget()->GetName(), GetTarget()->GetX(), GetTarget()->GetY(), GetTarget()->GetZ());
						database.SetMQDetectionFlag(AccountName(), GetName(), hacker_str, zone->GetShortName());
						safe_delete_array(hacker_str);
						SetTarget(NULL);
						return;
					}
				}
			}
			else if(DistNoRoot(*GetTarget()) > (zone->newzone_data.maxclip*zone->newzone_data.maxclip))
			{
				char *hacker_str = NULL;
				MakeAnyLenString(&hacker_str, "%s attempting to target something beyond the clip plane of %.2f units,"
					" from (%.2f, %.2f, %.2f) to %s (%.2f, %.2f, %.2f)", GetName(),
					(zone->newzone_data.maxclip*zone->newzone_data.maxclip),
					GetX(), GetY(), GetZ(), GetTarget()->GetName(), GetTarget()->GetX(), GetTarget()->GetY(), GetTarget()->GetZ());
				database.SetMQDetectionFlag(AccountName(), GetName(), hacker_str, zone->GetShortName());
				safe_delete_array(hacker_str);
				SetTarget(NULL);
				return;
			}

			GetTarget()->IsTargeted(1);
		}
	}
	return;
}

I will try to look through this later and maybe add in a "if(Admin() < 80)" type of check to allow GMs to use /target from any range. Just need to figure out the best place to put that, but it shouldn't be too hard.