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Server-side checking of digging; disable_anticheat setting

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This commit is contained in:
Perttu Ahola 2012-07-21 14:38:49 +03:00
parent b0ba05c9ac
commit 2795f44f03
6 changed files with 101 additions and 7 deletions
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63
src/server.cpp
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@ -3014,6 +3014,8 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
}
if(n.getContent() != CONTENT_IGNORE)
scriptapi_node_on_punch(m_lua, p_under, n, playersao);
// Cheat prevention
playersao->noCheatDigStart(p_under);
}
else if(pointed.type == POINTEDTHING_OBJECT)
{
@ -3051,7 +3053,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
*/
else if(action == 2)
{
// Only complete digging of nodes
// Only digging of nodes
if(pointed.type == POINTEDTHING_NODE)
{
MapNode n(CONTENT_IGNORE);
@ -3067,10 +3069,65 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
m_emerge_queue.addBlock(peer_id,
getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
}
if(n.getContent() != CONTENT_IGNORE)
/* Cheat prevention */
bool is_valid_dig = true;
if(!isSingleplayer() && !g_settings->getBool("disable_anticheat"))
{
v3s16 nocheat_p = playersao->getNoCheatDigPos();
float nocheat_t = playersao->getNoCheatDigTime();
playersao->noCheatDigEnd();
// If player didn't start digging this, ignore dig
if(nocheat_p != p_under){
infostream<<"Server: NoCheat: "<<player->getName()
<<" started digging "
<<PP(nocheat_p)<<" and completed digging "
<<PP(p_under)<<"; not digging."<<std::endl;
is_valid_dig = false;
}
// Get player's wielded item
ItemStack playeritem;
InventoryList *mlist = playersao->getInventory()->getList("main");
if(mlist != NULL)
playeritem = mlist->getItem(playersao->getWieldIndex());
ToolCapabilities playeritem_toolcap =
playeritem.getToolCapabilities(m_itemdef);
// Get diggability and expected digging time
DigParams params = getDigParams(m_nodedef->get(n).groups,
&playeritem_toolcap);
// If can't dig, try hand
if(!params.diggable){
const ItemDefinition &hand = m_itemdef->get("");
const ToolCapabilities *tp = hand.tool_capabilities;
if(tp)
params = getDigParams(m_nodedef->get(n).groups, tp);
}
// If can't dig, ignore dig
if(!params.diggable){
infostream<<"Server: NoCheat: "<<player->getName()
<<" completed digging "<<PP(p_under)
<<", which is not diggable with tool. not digging."
<<std::endl;
is_valid_dig = false;
}
// If time is considerably too short, ignore dig
// Check time only for medium and slow timed digs
if(params.diggable && params.time > 0.3 && nocheat_t < 0.5 * params.time){
infostream<<"Server: NoCheat: "<<player->getName()
<<" completed digging "
<<PP(p_under)<<" in "<<nocheat_t<<"s; expected "
<<params.time<<"s; not digging."<<std::endl;
is_valid_dig = false;
}
}
/* Actually dig node */
if(is_valid_dig && n.getContent() != CONTENT_IGNORE)
scriptapi_node_on_dig(m_lua, p_under, n, playersao);
if (m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR)
// Send unusual result (that is, node not being removed)
if(m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR)
{
// Re-send block to revert change on client-side
RemoteClient *client = getClient(peer_id);