Prehook PlayerRunCmd & TraceAttack

[stonedegg]

Can you show me how to do it? I'm looking to have it working for css and csgo.

[Ayuto]

Here is an example for CS:S (CS:GO shouldn't differ very much).

Syntax: Select all

# =============================================================================
# >> IMPORTS
# =============================================================================
# Memory
import memory

from memory import Argument
from memory import Return
from memory import Convention

from memory.hooks import PreHook

# Players
from players.bots import BotCmd
from players.helpers import index_from_pointer

# Core
from core import PLATFORM


# =============================================================================
# >> GLOBAL VARIABLES
# =============================================================================
# Get the server binary
server = memory.find_binary('cstrike/bin/server')

if PLATFORM == 'windows':
    identifier = b'\x55\x8B\xEC\x83\xEC\x54\x56\x89\x4D\xFC'
else:
    identifier = '_ZN9CCSPlayer16PlayerRunCommandEP8CUserCmdP11IMoveHelper'

# CCSPlayer::PlayerRunCommand(CUserCmd *, IMoveHelper *)
# The signature for CS:GO might be the same.
PLAYER_RUN_COMMAND = server[identifier].make_function(
    Convention.THISCALL,
    (Argument.POINTER, Argument.POINTER, Argument.BOOL),
    Return.VOID
)


# =============================================================================
# >> CALLBACKS
# =============================================================================
@PreHook(PLAYER_RUN_COMMAND)
def pre_player_run_command(args):
    # Get the player index
    ply_index = index_from_pointer(args[0])
    
    # Actually, this isn't a CBotCmd pointer, but CBotCmd has exactly the same
    # structure like CUserCmd. That's why we can use CBotCmd here.
    ucmd = memory.make_object(BotCmd, args[1])
    
    # Get the IMoveHelper pointer. We haven't exposed IMoveHelper, so if you
    # want to call a method of it, you need to reconstruct the class on your
    # own.
    move_helper = args[2]
    
    # TODO: Your code...

[stonedegg]

Thanks, I will try it out soon! Could you show me an example for prehooking TraceAttack too? I'm trying to find out if a player was hit by a flashbang (and on which hitbox). Would need that for cs:s only.

[Ayuto]

You would also use the PreHook decorator to hook TraceAttack.

But I don't think you need to hook that method for this. Just use the player_hurt event and check the weapon and hitbox.

[satoon101]

I cannot remember which, but either the flashbang or smokegrenade does not cause player_hurt if the victim is wearing armor. If it is the flashbang, you might try hooking OnTakeDamage to see if that is fired.