Chat: new settings to prevent spam

[minetest.git] / src / player.cpp

diff --git a/src/player.cpp b/src/player.cpp
index 5949712a50c8673c01ad33dc666185e76bb30487..fd72d63b6aaa7e3976665a4d309432c06923fccd 100644 (file)
--- a/src/player.cpp
+++ b/src/player.cpp
@@ -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;
+}
+