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144d5f62e1
Utilize the new IDetour::DetourSetup() code, IDetour::Attach and IDetour::Detach have been removed in favor of this (significantly reduces chance of user error). Since the template check happens in the idetour header, it is much more aggressive on type mismatches, such as a difference in parameter types, between the function and detour, will now raise a compile time error. As a result, some type mismatches have been fixed in this commit as well.
84 lines
3.4 KiB
C++
84 lines
3.4 KiB
C++
//====== Copyright <20> 1996-2005, Valve Corporation, All rights reserved. =======//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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//=============================================================================//
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#include "usercmd.h"
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#include "tier1/utlbuffer.h"
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#include "game/shared/in_buttons.h"
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#include "game/shared/weapon_types.h"
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//-----------------------------------------------------------------------------
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// Purpose: Read in a delta compressed usercommand.
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// Input : *buf -
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// *move -
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// *from -
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// Output : random seed
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//-----------------------------------------------------------------------------
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int ReadUserCmd(bf_read* buf, CUserCmd* move, CUserCmd* from)
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{
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const int seed = v_ReadUserCmd(buf, move, from);
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// Initialize the camera position as <0,0,0>, this should at least avoid
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// crash and meme behaviors. Has not been tested yet unlike all the
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// patches performed below.
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if (!move->camerapos.IsValid())
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move->camerapos.Init();
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// Viewangles must be normalized; applying invalid angles on the client
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// will result in undefined behavior, or a crash.
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move->viewangles.Normalize();
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move->pitchangles.Normalize();
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// Some players abused a feature of the engine which allows you to perform
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// custom weapon activities. After some research, it appears that only the
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// 'ACT_VM_WEAPON_INSPECT' was supposed to work for standard games, all the
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// other activities appears to be for development or testing, therefore, we
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// should only allow 'ACT_VM_WEAPON_INSPECT' if cheats are disabled.
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if (!sv_cheats->GetBool() && move->weaponactivity != ACT_VM_WEAPON_INSPECT)
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move->weaponactivity = ACT_NONE;
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// On the client, the frame time must be within 'usercmd_frametime_min'
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// and 'usercmd_frametime_max'. Testing revealed that speed hacking could
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// be achieved by sending bogus frame times. Clamp the networked frame
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// time to the exact values that the client should be using to make sure
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// it couldn't be circumvented by busting out the client side clamps.
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if (host_timescale->GetFloat() == 1.0f)
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move->frametime = clamp(move->frametime,
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usercmd_frametime_min->GetFloat(),
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usercmd_frametime_max->GetFloat());
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// Checks are only required if cycleslot is valid; see 'CPlayer::UpdateWeaponSlots'.
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if (move->cycleslot != WEAPON_INVENTORY_SLOT_INVALID)
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{
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const bool dualWieldEnabled = usercmd_dualwield_enable->GetBool();
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// Client could instruct the server to switch cycle slots for inventory
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// weapons, however, the client could also cycle to the dual wield slots.
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// dual wield weapons should be explicitly enabled to prevent exploitation.
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if (!dualWieldEnabled && move->cycleslot > WEAPON_INVENTORY_SLOT_ANTI_TITAN)
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move->cycleslot = WEAPON_INVENTORY_SLOT_ANTI_TITAN;
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// Array member 'CPlayer::m_selectedWeapons' is of size 2, values
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// (up to 254) result in arbitrary memory reads on the server.
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// Clamp the value to make sure it never reads out of bounds. Also,
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// if dual wield is disabled on the server, reset the weapon index
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// value as it would otherwise allow the client to enable several
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// equipped weapons at the same time.
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if (move->weaponindex >= WEAPON_INVENTORY_SLOT_PRIMARY_1)
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dualWieldEnabled
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? move->weaponindex = WEAPON_INVENTORY_SLOT_PRIMARY_1
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: move->weaponindex = WEAPON_INVENTORY_SLOT_PRIMARY_0;
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}
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return seed;
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}
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//-----------------------------------------------------------------------------
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void VUserCmd::Detour(const bool bAttach) const
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{
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DetourSetup(&v_ReadUserCmd, &ReadUserCmd, bAttach);
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}
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