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Clamp client-sent movement speed control (#15721)

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Results in the `movement_x` and `movement_y` fields of `player:get_player_control()` being safe to use
(otherwise users would need to compute the length as `(x^2 + y^2)^0.5` and clamp that to 1 themselves).
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Lars Müller 2025-02-04 12:19:00 +01:00 • committed by GitHub
parent b2a6c3ba23
commit a73e71510a
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1 changed files with 7 additions and 1 deletions
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8
src/network/serverpackethandler.cpp
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@ -30,6 +30,8 @@
#include "util/srp.h"
#include "clientdynamicinfo.h"
#include <algorithm>
void Server::handleCommand_Deprecated(NetworkPacket* pkt)
{
infostream << "Server: " << toServerCommandTable[pkt->getCommand()].name
@ -468,7 +470,11 @@ void Server::process_PlayerPos(RemotePlayer *player, PlayerSAO *playersao,
*pkt >> bits;
if (pkt->getRemainingBytes() >= 8) {
*pkt >> player->control.movement_speed;
f32 movement_speed;
*pkt >> movement_speed;
if (movement_speed != movement_speed) // NaN
movement_speed = 0.0f;
player->control.movement_speed = std::clamp(movement_speed, 0.0f, 1.0f);
*pkt >> player->control.movement_direction;
} else {
player->control.movement_speed = 0.0f;