diff options
| -rw-r--r-- | src/network/serverpackethandler.cpp | 67 | ||||
| -rw-r--r-- | src/server.h | 1 |
2 files changed, 46 insertions, 22 deletions
diff --git a/src/network/serverpackethandler.cpp b/src/network/serverpackethandler.cpp index b248b867b..6ea58a7ec 100644 --- a/src/network/serverpackethandler.cpp +++ b/src/network/serverpackethandler.cpp @@ -622,6 +622,18 @@ void Server::handleCommand_InventoryAction(NetworkPacket* pkt) (ma->to_inv.type == InventoryLocation::PLAYER) && (ma->to_inv.name == player->getName()); + InventoryLocation *remote = from_inv_is_current_player ? + &ma->to_inv : &ma->from_inv; + + // Check for out-of-range interaction + if (remote->type == InventoryLocation::NODEMETA) { + v3f node_pos = intToFloat(remote->p, BS); + v3f player_pos = player->getPlayerSAO()->getBasePosition(); + f32 d = player_pos.getDistanceFrom(node_pos); + if (!checkInteractDistance(player, d, "inventory")) + return; + } + /* Disable moving items out of craftpreview */ @@ -940,6 +952,37 @@ void Server::handleCommand_Respawn(NetworkPacket* pkt) // the previous addition has been successfully removed } +bool Server::checkInteractDistance(RemotePlayer *player, const f32 d, const std::string what) +{ + PlayerSAO *playersao = player->getPlayerSAO(); + const InventoryList *hlist = playersao->getInventory()->getList("hand"); + const ItemDefinition &playeritem_def = + playersao->getWieldedItem().getDefinition(m_itemdef); + const ItemDefinition &hand_def = + hlist ? hlist->getItem(0).getDefinition(m_itemdef) : m_itemdef->get(""); + + float max_d = BS * playeritem_def.range; + float max_d_hand = BS * hand_def.range; + + if (max_d < 0 && max_d_hand >= 0) + max_d = max_d_hand; + else if (max_d < 0) + max_d = BS * 4.0f; + + // cube diagonal: sqrt(3) = 1.732 + if (d > max_d * 1.732) { + actionstream << "Player " << player->getName() + << " tried to access " << what + << " from too far: " + << "d=" << d <<", max_d=" << max_d + << ". ignoring." << std::endl; + // Call callbacks + m_script->on_cheat(playersao, "interacted_too_far"); + return false; + } + return true; +} + void Server::handleCommand_Interact(NetworkPacket* pkt) { /* @@ -1065,33 +1108,13 @@ void Server::handleCommand_Interact(NetworkPacket* pkt) !g_settings->getBool("disable_anticheat"); if ((action == 0 || action == 2 || action == 3 || action == 4) && - (enable_anticheat && !isSingleplayer())) { + enable_anticheat && !isSingleplayer()) { float d = player_pos.getDistanceFrom(pointed_pos_under); - const ItemDefinition &playeritem_def = - playersao->getWieldedItem().getDefinition(m_itemdef); - float max_d = BS * playeritem_def.range; - InventoryList *hlist = playersao->getInventory()->getList("hand"); - const ItemDefinition &hand_def = - hlist ? (hlist->getItem(0).getDefinition(m_itemdef)) : (m_itemdef->get("")); - float max_d_hand = BS * hand_def.range; - if (max_d < 0 && max_d_hand >= 0) - max_d = max_d_hand; - else if (max_d < 0) - max_d = BS * 4.0f; - // cube diagonal: sqrt(3) = 1.73 - if (d > max_d * 1.73) { - actionstream << "Player " << player->getName() - << " tried to access " << pointed.dump() - << " from too far: " - << "d=" << d <<", max_d=" << max_d - << ". ignoring." << std::endl; + if (!checkInteractDistance(player, d, pointed.dump())) { // Re-send block to revert change on client-side RemoteClient *client = getClient(pkt->getPeerId()); v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS)); client->SetBlockNotSent(blockpos); - // Call callbacks - m_script->on_cheat(playersao, "interacted_too_far"); - // Do nothing else return; } } diff --git a/src/server.h b/src/server.h index 86f558d54..ae7511bdf 100644 --- a/src/server.h +++ b/src/server.h @@ -464,6 +464,7 @@ private: void RespawnPlayer(session_t peer_id); void DeleteClient(session_t peer_id, ClientDeletionReason reason); void UpdateCrafting(RemotePlayer *player); + bool checkInteractDistance(RemotePlayer *player, const f32 d, const std::string what); void handleChatInterfaceEvent(ChatEvent *evt); |