531 lines
20 KiB
C++
531 lines
20 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2014 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#pragma once
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#include "irr_v3d.h" // for irrlicht datatypes
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#include "constants.h"
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#include "serialization.h" // for SER_FMT_VER_INVALID
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#include "network/networkpacket.h"
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#include "network/networkprotocol.h"
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#include "network/address.h"
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#include "porting.h"
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#include <list>
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#include <vector>
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#include <set>
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#include <memory>
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#include <mutex>
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class MapBlock;
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class ServerEnvironment;
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class EmergeManager;
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/*
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* State Transitions
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Start
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(peer connect)
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v
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/-----------------\
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| |
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| Created |
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| |
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\-----------------/
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| depending of the incoming packet
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----------------------------------------
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v
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+-----------------------------+
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|IN: |
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| TOSERVER_INIT |
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+-----------------------------+
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| invalid playername
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| or denied by mod
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v
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+-----------------------------+
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|OUT: |
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| TOCLIENT_HELLO |
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+-----------------------------+
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v
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/-----------------\ /-----------------\
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| | | |
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| AwaitingInit2 |<--------- | HelloSent |
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| | | | |
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\-----------------/ | \-----------------/
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| | |
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+-----------------------------+ | *-----------------------------* Auth fails
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|IN: | | |Authentication, depending on |------------------
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| TOSERVER_INIT2 | | | packet sent by client | |
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+-----------------------------+ | *-----------------------------* |
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| | | |
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| | | Authentication |
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v | | successful |
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/-----------------\ | v |
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| | | +-----------------------------+ |
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| InitDone | | |OUT: | |
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| | | | TOCLIENT_AUTH_ACCEPT | |
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\-----------------/ | +-----------------------------+ |
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| | | |
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+-----------------------------+ --------------------- |
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|OUT: | |
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| TOCLIENT_MOVEMENT | |
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| TOCLIENT_ITEMDEF | |
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| TOCLIENT_NODEDEF | |
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| TOCLIENT_ANNOUNCE_MEDIA | |
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| TOCLIENT_DETACHED_INVENTORY | |
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| TOCLIENT_TIME_OF_DAY | |
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+-----------------------------+ |
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| |
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| |
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| ----------------------------- |
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v | | |
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/-----------------\ v |
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| | +-----------------------------+ |
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| DefinitionsSent | |IN: | |
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| | | TOSERVER_REQUEST_MEDIA | |
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\-----------------/ | | |
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| +-----------------------------+ |
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| ^ | |
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| ----------------------------- |
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v v
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+-----------------------------+ --------------------------------+
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|IN: | | ^
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| TOSERVER_CLIENT_READY | v |
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+-----------------------------+ +------------------------+ |
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| |OUT: | |
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v | TOCLIENT_ACCESS_DENIED | |
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+-----------------------------+ +------------------------+ |
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|OUT: | | |
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| TOCLIENT_MOVE_PLAYER | v |
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| TOCLIENT_PRIVILEGES | /-----------------\ |
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| TOCLIENT_INVENTORY_FORMSPEC | | | |
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| UpdateCrafting | | Denied | |
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| TOCLIENT_INVENTORY | | | |
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| TOCLIENT_HP (opt) | \-----------------/ |
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| TOCLIENT_BREATH | |
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| TOCLIENT_DEATHSCREEN | |
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+-----------------------------+ |
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v |
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/-----------------\ async mod action (ban, kick) |
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| |---------------------------------------------------------------
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---->| Active |
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| | |----------------------------------------------
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| \-----------------/ timeout v
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| | | +-----------------------------+
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| | | |OUT: |
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| | | | TOCLIENT_DISCONNECT |
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| | | +-----------------------------+
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| | | |
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| | v v
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| | +-----------------------------+ /-----------------\
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| | |IN: | | |
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| | | TOSERVER_DISCONNECT |------------------->| Disconnecting |
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| | +-----------------------------+ | |
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| | \-----------------/
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| | any auth packet which was
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| | allowed in TOCLIENT_AUTH_ACCEPT
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| v
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| *-----------------------------* Auth +-------------------------------+
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| |Authentication, depending on | succeeds |OUT: |
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| | packet sent by client |---------->| TOCLIENT_ACCEPT_SUDO_MODE |
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| *-----------------------------* +-------------------------------+
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| | |
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| | Auth fails /-----------------\
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| v | |
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| +-------------------------------+ | SudoMode |
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| |OUT: | | |
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| | TOCLIENT_DENY_SUDO_MODE | \-----------------/
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| +-------------------------------+ |
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| | v
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| | +-----------------------------+
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| | sets password accordingly |IN: |
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-------------------+-------------------------------| TOSERVER_FIRST_SRP |
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+-----------------------------+
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*/
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namespace con {
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class Connection;
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}
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// Also make sure to update the ClientInterface::statenames
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// array when modifying these enums
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enum ClientState
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{
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CS_Invalid,
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CS_Disconnecting,
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CS_Denied,
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CS_Created,
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CS_AwaitingInit2,
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CS_HelloSent,
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CS_InitDone,
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CS_DefinitionsSent,
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CS_Active,
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CS_SudoMode
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};
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enum ClientStateEvent
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{
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CSE_Hello,
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CSE_AuthAccept,
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CSE_GotInit2,
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CSE_SetDenied,
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CSE_SetDefinitionsSent,
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CSE_SetClientReady,
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CSE_SudoSuccess,
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CSE_SudoLeave,
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CSE_Disconnect
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};
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/*
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Used for queueing and sorting block transfers in containers
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Lower priority number means higher priority.
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*/
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struct PrioritySortedBlockTransfer
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{
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PrioritySortedBlockTransfer(float a_priority, const v3s16 &a_pos, session_t a_peer_id)
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{
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priority = a_priority;
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pos = a_pos;
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peer_id = a_peer_id;
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}
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bool operator < (const PrioritySortedBlockTransfer &other) const
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{
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return priority < other.priority;
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}
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float priority;
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v3s16 pos;
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session_t peer_id;
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};
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class RemoteClient
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{
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public:
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// peer_id=0 means this client has no associated peer
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// NOTE: If client is made allowed to exist while peer doesn't,
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// this has to be set to 0 when there is no peer.
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// Also, the client must be moved to some other container.
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session_t peer_id = PEER_ID_INEXISTENT;
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// The serialization version to use with the client
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u8 serialization_version = SER_FMT_VER_INVALID;
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//
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u16 net_proto_version = 0;
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/* Authentication information */
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std::string enc_pwd = "";
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bool create_player_on_auth_success = false;
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AuthMechanism chosen_mech = AUTH_MECHANISM_NONE;
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void *auth_data = nullptr;
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u32 allowed_auth_mechs = 0;
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u32 allowed_sudo_mechs = 0;
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bool isSudoMechAllowed(AuthMechanism mech)
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{ return allowed_sudo_mechs & mech; }
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bool isMechAllowed(AuthMechanism mech)
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{ return allowed_auth_mechs & mech; }
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RemoteClient();
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~RemoteClient() = default;
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/*
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Finds block that should be sent next to the client.
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Environment should be locked when this is called.
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dtime is used for resetting send radius at slow interval
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*/
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void GetNextBlocks(ServerEnvironment *env, EmergeManager* emerge,
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float dtime, std::vector<PrioritySortedBlockTransfer> &dest);
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void GotBlock(v3s16 p);
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void SentBlock(v3s16 p);
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void SetBlockNotSent(v3s16 p);
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void SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks);
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/**
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* tell client about this block being modified right now.
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* this information is required to requeue the block in case it's "on wire"
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* while modification is processed by server
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* @param p position of modified block
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*/
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void ResendBlockIfOnWire(v3s16 p);
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u32 getSendingCount() const { return m_blocks_sending.size(); }
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bool isBlockSent(v3s16 p) const
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{
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return m_blocks_sent.find(p) != m_blocks_sent.end();
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}
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// Increments timeouts and removes timed-out blocks from list
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// NOTE: This doesn't fix the server-not-sending-block bug
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// because it is related to emerging, not sending.
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//void RunSendingTimeouts(float dtime, float timeout);
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void PrintInfo(std::ostream &o)
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{
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o<<"RemoteClient "<<peer_id<<": "
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<<"m_blocks_sent.size()="<<m_blocks_sent.size()
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<<", m_blocks_sending.size()="<<m_blocks_sending.size()
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<<", m_nearest_unsent_d="<<m_nearest_unsent_d
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<<", m_excess_gotblocks="<<m_excess_gotblocks
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<<std::endl;
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m_excess_gotblocks = 0;
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}
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// Time from last placing or removing blocks
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float m_time_from_building = 9999;
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/*
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List of active objects that the client knows of.
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*/
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std::set<u16> m_known_objects;
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ClientState getState() const { return m_state; }
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std::string getName() const { return m_name; }
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void setName(const std::string &name) { m_name = name; }
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/* update internal client state */
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void notifyEvent(ClientStateEvent event);
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/* set expected serialization version */
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void setPendingSerializationVersion(u8 version)
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{ m_pending_serialization_version = version; }
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void setDeployedCompressionMode(u16 byteFlag)
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{ m_deployed_compression = byteFlag; }
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void confirmSerializationVersion()
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{ serialization_version = m_pending_serialization_version; }
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/* get uptime */
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u64 uptime() const;
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/* set version information */
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void setVersionInfo(u8 major, u8 minor, u8 patch, const std::string &full)
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{
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m_version_major = major;
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m_version_minor = minor;
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m_version_patch = patch;
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m_full_version = full;
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}
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/* read version information */
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u8 getMajor() const { return m_version_major; }
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u8 getMinor() const { return m_version_minor; }
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u8 getPatch() const { return m_version_patch; }
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const std::string &getFullVer() const { return m_full_version; }
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void setLangCode(const std::string &code) { m_lang_code = code; }
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const std::string &getLangCode() const { return m_lang_code; }
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void setCachedAddress(const Address &addr) { m_addr = addr; }
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const Address &getAddress() const { return m_addr; }
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private:
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// Version is stored in here after INIT before INIT2
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u8 m_pending_serialization_version = SER_FMT_VER_INVALID;
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/* current state of client */
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ClientState m_state = CS_Created;
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// Cached here so retrieval doesn't have to go to connection API
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Address m_addr;
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// Client sent language code
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std::string m_lang_code;
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/*
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Blocks that have been sent to client.
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- These don't have to be sent again.
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- A block is cleared from here when client says it has
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deleted it from it's memory
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List of block positions.
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No MapBlock* is stored here because the blocks can get deleted.
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*/
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std::set<v3s16> m_blocks_sent;
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s16 m_nearest_unsent_d = 0;
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v3s16 m_last_center;
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v3f m_last_camera_dir;
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const u16 m_max_simul_sends;
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const float m_min_time_from_building;
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const s16 m_max_send_distance;
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const s16 m_block_optimize_distance;
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const s16 m_max_gen_distance;
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const bool m_occ_cull;
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/*
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Blocks that are currently on the line.
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This is used for throttling the sending of blocks.
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- The size of this list is limited to some value
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Block is added when it is sent with BLOCKDATA.
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Block is removed when GOTBLOCKS is received.
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Value is time from sending. (not used at the moment)
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*/
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std::map<v3s16, float> m_blocks_sending;
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/*
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Blocks that have been modified since blocks were
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sent to the client last (getNextBlocks()).
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This is used to reset the unsent distance, so that
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modified blocks are resent to the client.
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List of block positions.
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*/
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std::set<v3s16> m_blocks_modified;
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/*
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Count of excess GotBlocks().
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There is an excess amount because the client sometimes
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gets a block so late that the server sends it again,
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and the client then sends two GOTBLOCKs.
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This is resetted by PrintInfo()
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*/
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u32 m_excess_gotblocks = 0;
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// CPU usage optimization
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float m_nothing_to_send_pause_timer = 0.0f;
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/*
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name of player using this client
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*/
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std::string m_name = "";
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/*
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client information
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*/
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u8 m_version_major = 0;
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u8 m_version_minor = 0;
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u8 m_version_patch = 0;
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std::string m_full_version = "unknown";
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u16 m_deployed_compression = 0;
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/*
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time this client was created
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*/
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const u64 m_connection_time = porting::getTimeS();
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};
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typedef std::unordered_map<u16, RemoteClient*> RemoteClientMap;
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class ClientInterface {
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public:
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friend class Server;
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ClientInterface(const std::shared_ptr<con::Connection> &con);
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~ClientInterface();
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/* run sync step */
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void step(float dtime);
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/* get list of active client id's */
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std::vector<session_t> getClientIDs(ClientState min_state=CS_Active);
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/* mark block as not sent to active client sessions */
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void markBlockposAsNotSent(const v3s16 &pos);
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/* verify is server user limit was reached */
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bool isUserLimitReached();
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/* get list of client player names */
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const std::vector<std::string> &getPlayerNames() const { return m_clients_names; }
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/* send message to client */
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void send(session_t peer_id, u8 channelnum, NetworkPacket *pkt, bool reliable);
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/* send to all clients */
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void sendToAll(NetworkPacket *pkt);
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void sendToAllCompat(NetworkPacket *pkt, NetworkPacket *legacypkt, u16 min_proto_ver);
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/* delete a client */
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void DeleteClient(session_t peer_id);
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/* create client */
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void CreateClient(session_t peer_id);
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/* get a client by peer_id */
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RemoteClient *getClientNoEx(session_t peer_id, ClientState state_min = CS_Active);
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/* get client by peer_id (make sure you have list lock before!*/
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RemoteClient *lockedGetClientNoEx(session_t peer_id, ClientState state_min = CS_Active);
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/* get state of client by id*/
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ClientState getClientState(session_t peer_id);
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/* set client playername */
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void setPlayerName(session_t peer_id, const std::string &name);
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/* get protocol version of client */
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u16 getProtocolVersion(session_t peer_id);
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/* set client version */
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void setClientVersion(session_t peer_id, u8 major, u8 minor, u8 patch,
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const std::string &full);
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/* event to update client state */
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void event(session_t peer_id, ClientStateEvent event);
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/* Set environment. Do not call this function if environment is already set */
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void setEnv(ServerEnvironment *env)
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{
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assert(m_env == NULL); // pre-condition
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m_env = env;
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}
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static std::string state2Name(ClientState state);
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protected:
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//TODO find way to avoid this functions
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void lock() { m_clients_mutex.lock(); }
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void unlock() { m_clients_mutex.unlock(); }
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RemoteClientMap& getClientList() { return m_clients; }
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private:
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/* update internal player list */
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void UpdatePlayerList();
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// Connection
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std::shared_ptr<con::Connection> m_con;
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std::recursive_mutex m_clients_mutex;
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// Connected clients (behind the con mutex)
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RemoteClientMap m_clients;
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std::vector<std::string> m_clients_names; //for announcing masterserver
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// Environment
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ServerEnvironment *m_env;
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float m_print_info_timer;
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static const char *statenames[];
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};
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