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Code Wiki Activity

Chat: new settings to prevent spam

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Added the following chat coreside features
* Chat messages length limit
* Message rate limiting
* Message rate kicking

Note:
* handleChat now takes RemotePlayer pointer instead of u16 to remove useless
  lookups
This commit is contained in:
Loic Blot 2016-10-04 18:17:12 +02:00
parent 1079aeaa13
commit d4c76258e3
8 changed files with 125 additions and 11 deletions
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56
src/player.cpp
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@ -227,10 +227,25 @@ void Player::clearHud()
}
}
// static config cache for remoteplayer
bool RemotePlayer::m_setting_cache_loaded = false;
float RemotePlayer::m_setting_chat_message_limit_per_10sec = 0.0f;
u16 RemotePlayer::m_setting_chat_message_limit_trigger_kick = 0;
RemotePlayer::RemotePlayer(IGameDef *gamedef, const char *name):
Player(gamedef, name),
m_sao(NULL)
m_sao(NULL),
m_last_chat_message_sent(time(NULL)),
m_chat_message_allowance(5.0f),
m_message_rate_overhead(0)
{
if (!RemotePlayer::m_setting_cache_loaded) {
RemotePlayer::m_setting_chat_message_limit_per_10sec =
g_settings->getFloat("chat_message_limit_per_10sec");
RemotePlayer::m_setting_chat_message_limit_trigger_kick =
g_settings->getU16("chat_message_limit_trigger_kick");
RemotePlayer::m_setting_cache_loaded = true;
}
movement_acceleration_default = g_settings->getFloat("movement_acceleration_default") * BS;
movement_acceleration_air = g_settings->getFloat("movement_acceleration_air") * BS;
movement_acceleration_fast = g_settings->getFloat("movement_acceleration_fast") * BS;
@ -304,3 +319,42 @@ void RemotePlayer::setPosition(const v3f &position)
m_sao->setBasePosition(position);
}
const RemotePlayerChatResult RemotePlayer::canSendChatMessage()
{
// Rate limit messages
u32 now = time(NULL);
float time_passed = now - m_last_chat_message_sent;
m_last_chat_message_sent = now;
// If this feature is disabled
if (m_setting_chat_message_limit_per_10sec <= 0.0) {
return RPLAYER_CHATRESULT_OK;
}
m_chat_message_allowance += time_passed * (m_setting_chat_message_limit_per_10sec / 8.0f);
if (m_chat_message_allowance > m_setting_chat_message_limit_per_10sec) {
m_chat_message_allowance = m_setting_chat_message_limit_per_10sec;
}
if (m_chat_message_allowance < 1.0f) {
infostream << "Player " << m_name
<< " chat limited due to excessive message amount." << std::endl;
// Kick player if flooding is too intensive
m_message_rate_overhead++;
if (m_message_rate_overhead > RemotePlayer::m_setting_chat_message_limit_trigger_kick) {
return RPLAYER_CHATRESULT_KICK;
}
return RPLAYER_CHATRESULT_FLOODING;
}
// Reinit message overhead
if (m_message_rate_overhead > 0) {
m_message_rate_overhead = 0;
}
m_chat_message_allowance -= 1.0f;
return RPLAYER_CHATRESULT_OK;
}