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- /*
- Minetest
- Copyright (C) 2015 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #include "chatmessage.h"
- #include "server.h"
- #include "log.h"
- #include "content_sao.h"
- #include "emerge.h"
- #include "mapblock.h"
- #include "modchannels.h"
- #include "nodedef.h"
- #include "remoteplayer.h"
- #include "rollback_interface.h"
- #include "scripting_server.h"
- #include "settings.h"
- #include "tool.h"
- #include "version.h"
- #include "network/connection.h"
- #include "network/networkprotocol.h"
- #include "network/serveropcodes.h"
- #include "util/auth.h"
- #include "util/base64.h"
- #include "util/pointedthing.h"
- #include "util/serialize.h"
- #include "util/srp.h"
- void Server::handleCommand_Deprecated(NetworkPacket* pkt)
- {
- infostream << "Server: " << toServerCommandTable[pkt->getCommand()].name
- << " not supported anymore" << std::endl;
- }
- void Server::handleCommand_Init(NetworkPacket* pkt)
- {
- if(pkt->getSize() < 1)
- return;
- RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
- std::string addr_s;
- try {
- Address address = getPeerAddress(pkt->getPeerId());
- addr_s = address.serializeString();
- }
- catch (con::PeerNotFoundException &e) {
- /*
- * no peer for this packet found
- * most common reason is peer timeout, e.g. peer didn't
- * respond for some time, your server was overloaded or
- * things like that.
- */
- infostream << "Server::ProcessData(): Canceling: peer "
- << pkt->getPeerId() << " not found" << std::endl;
- return;
- }
- // If net_proto_version is set, this client has already been handled
- if (client->getState() > CS_Created) {
- verbosestream << "Server: Ignoring multiple TOSERVER_INITs from "
- << addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
- return;
- }
- verbosestream << "Server: Got TOSERVER_INIT from " << addr_s << " (peer_id="
- << pkt->getPeerId() << ")" << std::endl;
- // Do not allow multiple players in simple singleplayer mode.
- // This isn't a perfect way to do it, but will suffice for now
- if (m_simple_singleplayer_mode && m_clients.getClientIDs().size() > 1) {
- infostream << "Server: Not allowing another client (" << addr_s
- << ") to connect in simple singleplayer mode" << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SINGLEPLAYER);
- return;
- }
- // First byte after command is maximum supported
- // serialization version
- u8 client_max;
- u16 supp_compr_modes;
- u16 min_net_proto_version = 0;
- u16 max_net_proto_version;
- std::string playerName;
- *pkt >> client_max >> supp_compr_modes >> min_net_proto_version
- >> max_net_proto_version >> playerName;
- u8 our_max = SER_FMT_VER_HIGHEST_READ;
- // Use the highest version supported by both
- u8 depl_serial_v = std::min(client_max, our_max);
- // If it's lower than the lowest supported, give up.
- if (depl_serial_v < SER_FMT_VER_LOWEST_READ)
- depl_serial_v = SER_FMT_VER_INVALID;
- if (depl_serial_v == SER_FMT_VER_INVALID) {
- actionstream << "Server: A mismatched client tried to connect from "
- << addr_s << std::endl;
- infostream<<"Server: Cannot negotiate serialization version with "
- << addr_s << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
- return;
- }
- client->setPendingSerializationVersion(depl_serial_v);
- /*
- Read and check network protocol version
- */
- u16 net_proto_version = 0;
- // Figure out a working version if it is possible at all
- if (max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
- min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX) {
- // If maximum is larger than our maximum, go with our maximum
- if (max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
- net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
- // Else go with client's maximum
- else
- net_proto_version = max_net_proto_version;
- }
- verbosestream << "Server: " << addr_s << ": Protocol version: min: "
- << min_net_proto_version << ", max: " << max_net_proto_version
- << ", chosen: " << net_proto_version << std::endl;
- client->net_proto_version = net_proto_version;
- if ((g_settings->getBool("strict_protocol_version_checking") &&
- net_proto_version != LATEST_PROTOCOL_VERSION) ||
- net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
- net_proto_version > SERVER_PROTOCOL_VERSION_MAX) {
- actionstream << "Server: A mismatched client tried to connect from "
- << addr_s << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
- return;
- }
- /*
- Validate player name
- */
- const char* playername = playerName.c_str();
- size_t pns = playerName.size();
- if (pns == 0 || pns > PLAYERNAME_SIZE) {
- actionstream << "Server: Player with "
- << ((pns > PLAYERNAME_SIZE) ? "a too long" : "an empty")
- << " name tried to connect from " << addr_s << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_NAME);
- return;
- }
- if (!string_allowed(playerName, PLAYERNAME_ALLOWED_CHARS)) {
- actionstream << "Server: Player with an invalid name "
- << "tried to connect from " << addr_s << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_CHARS_IN_NAME);
- return;
- }
- m_clients.setPlayerName(pkt->getPeerId(), playername);
- //TODO (later) case insensitivity
- std::string legacyPlayerNameCasing = playerName;
- if (!isSingleplayer() && strcasecmp(playername, "singleplayer") == 0) {
- actionstream << "Server: Player with the name \"singleplayer\" "
- << "tried to connect from " << addr_s << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_NAME);
- return;
- }
- {
- std::string reason;
- if (m_script->on_prejoinplayer(playername, addr_s, &reason)) {
- actionstream << "Server: Player with the name \"" << playerName << "\" "
- << "tried to connect from " << addr_s << " "
- << "but it was disallowed for the following reason: "
- << reason << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_CUSTOM_STRING, reason);
- return;
- }
- }
- infostream << "Server: New connection: \"" << playerName << "\" from "
- << addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
- // Enforce user limit.
- // Don't enforce for users that have some admin right or mod permits it.
- if (m_clients.isUserLimitReached() &&
- playername != g_settings->get("name") &&
- !m_script->can_bypass_userlimit(playername, addr_s)) {
- actionstream << "Server: " << playername << " tried to join from "
- << addr_s << ", but there" << " are already max_users="
- << g_settings->getU16("max_users") << " players." << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_TOO_MANY_USERS);
- return;
- }
- /*
- Compose auth methods for answer
- */
- std::string encpwd; // encrypted Password field for the user
- bool has_auth = m_script->getAuth(playername, &encpwd, NULL);
- u32 auth_mechs = 0;
- client->chosen_mech = AUTH_MECHANISM_NONE;
- if (has_auth) {
- std::vector<std::string> pwd_components = str_split(encpwd, '#');
- if (pwd_components.size() == 4) {
- if (pwd_components[1] == "1") { // 1 means srp
- auth_mechs |= AUTH_MECHANISM_SRP;
- client->enc_pwd = encpwd;
- } else {
- actionstream << "User " << playername
- << " tried to log in, but password field"
- << " was invalid (unknown mechcode)." << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
- return;
- }
- } else if (base64_is_valid(encpwd)) {
- auth_mechs |= AUTH_MECHANISM_LEGACY_PASSWORD;
- client->enc_pwd = encpwd;
- } else {
- actionstream << "User " << playername
- << " tried to log in, but password field"
- << " was invalid (invalid base64)." << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
- return;
- }
- } else {
- std::string default_password = g_settings->get("default_password");
- if (default_password.length() == 0) {
- auth_mechs |= AUTH_MECHANISM_FIRST_SRP;
- } else {
- // Take care of default passwords.
- client->enc_pwd = get_encoded_srp_verifier(playerName, default_password);
- auth_mechs |= AUTH_MECHANISM_SRP;
- // Allocate player in db, but only on successful login.
- client->create_player_on_auth_success = true;
- }
- }
- /*
- Answer with a TOCLIENT_HELLO
- */
- verbosestream << "Sending TOCLIENT_HELLO with auth method field: "
- << auth_mechs << std::endl;
- NetworkPacket resp_pkt(TOCLIENT_HELLO, 1 + 4
- + legacyPlayerNameCasing.size(), pkt->getPeerId());
- u16 depl_compress_mode = NETPROTO_COMPRESSION_NONE;
- resp_pkt << depl_serial_v << depl_compress_mode << net_proto_version
- << auth_mechs << legacyPlayerNameCasing;
- Send(&resp_pkt);
- client->allowed_auth_mechs = auth_mechs;
- client->setDeployedCompressionMode(depl_compress_mode);
- m_clients.event(pkt->getPeerId(), CSE_Hello);
- }
- void Server::handleCommand_Init2(NetworkPacket* pkt)
- {
- verbosestream << "Server: Got TOSERVER_INIT2 from "
- << pkt->getPeerId() << std::endl;
- m_clients.event(pkt->getPeerId(), CSE_GotInit2);
- u16 protocol_version = m_clients.getProtocolVersion(pkt->getPeerId());
- std::string lang;
- if (pkt->getSize() > 0)
- *pkt >> lang;
- /*
- Send some initialization data
- */
- infostream << "Server: Sending content to "
- << getPlayerName(pkt->getPeerId()) << std::endl;
- // Send player movement settings
- SendMovement(pkt->getPeerId());
- // Send item definitions
- SendItemDef(pkt->getPeerId(), m_itemdef, protocol_version);
- // Send node definitions
- SendNodeDef(pkt->getPeerId(), m_nodedef, protocol_version);
- m_clients.event(pkt->getPeerId(), CSE_SetDefinitionsSent);
- // Send media announcement
- sendMediaAnnouncement(pkt->getPeerId(), lang);
- // Send detached inventories
- sendDetachedInventories(pkt->getPeerId());
- // Send time of day
- u16 time = m_env->getTimeOfDay();
- float time_speed = g_settings->getFloat("time_speed");
- SendTimeOfDay(pkt->getPeerId(), time, time_speed);
- SendCSMFlavourLimits(pkt->getPeerId());
- // Warnings about protocol version can be issued here
- if (getClient(pkt->getPeerId())->net_proto_version < LATEST_PROTOCOL_VERSION) {
- SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
- L"# Server: WARNING: YOUR CLIENT'S VERSION MAY NOT BE FULLY COMPATIBLE "
- L"WITH THIS SERVER!"));
- }
- }
- void Server::handleCommand_RequestMedia(NetworkPacket* pkt)
- {
- std::vector<std::string> tosend;
- u16 numfiles;
- *pkt >> numfiles;
- infostream << "Sending " << numfiles << " files to "
- << getPlayerName(pkt->getPeerId()) << std::endl;
- verbosestream << "TOSERVER_REQUEST_MEDIA: " << std::endl;
- for (u16 i = 0; i < numfiles; i++) {
- std::string name;
- *pkt >> name;
- tosend.push_back(name);
- verbosestream << "TOSERVER_REQUEST_MEDIA: requested file "
- << name << std::endl;
- }
- sendRequestedMedia(pkt->getPeerId(), tosend);
- }
- void Server::handleCommand_ClientReady(NetworkPacket* pkt)
- {
- session_t peer_id = pkt->getPeerId();
- PlayerSAO* playersao = StageTwoClientInit(peer_id);
- if (playersao == NULL) {
- actionstream
- << "TOSERVER_CLIENT_READY stage 2 client init failed for peer_id: "
- << peer_id << std::endl;
- DisconnectPeer(peer_id);
- return;
- }
- if (pkt->getSize() < 8) {
- errorstream
- << "TOSERVER_CLIENT_READY client sent inconsistent data, disconnecting peer_id: "
- << peer_id << std::endl;
- DisconnectPeer(peer_id);
- return;
- }
- u8 major_ver, minor_ver, patch_ver, reserved;
- std::string full_ver;
- *pkt >> major_ver >> minor_ver >> patch_ver >> reserved >> full_ver;
- m_clients.setClientVersion(
- peer_id, major_ver, minor_ver, patch_ver,
- full_ver);
- const std::vector<std::string> &players = m_clients.getPlayerNames();
- NetworkPacket list_pkt(TOCLIENT_UPDATE_PLAYER_LIST, 0, peer_id);
- list_pkt << (u8) PLAYER_LIST_INIT << (u16) players.size();
- for (const std::string &player: players) {
- list_pkt << player;
- }
- m_clients.send(peer_id, 0, &list_pkt, true);
- NetworkPacket notice_pkt(TOCLIENT_UPDATE_PLAYER_LIST, 0, PEER_ID_INEXISTENT);
- // (u16) 1 + std::string represents a pseudo vector serialization representation
- notice_pkt << (u8) PLAYER_LIST_ADD << (u16) 1 << std::string(playersao->getPlayer()->getName());
- m_clients.sendToAll(¬ice_pkt);
- m_clients.event(peer_id, CSE_SetClientReady);
- m_script->on_joinplayer(playersao);
- // Send shutdown timer if shutdown has been scheduled
- if (m_shutdown_timer > 0.0f) {
- std::wstringstream ws;
- ws << L"*** Server shutting down in "
- << duration_to_string(myround(m_shutdown_timer)).c_str() << ".";
- SendChatMessage(pkt->getPeerId(), ws.str());
- }
- }
- void Server::handleCommand_GotBlocks(NetworkPacket* pkt)
- {
- if (pkt->getSize() < 1)
- return;
- /*
- [0] u16 command
- [2] u8 count
- [3] v3s16 pos_0
- [3+6] v3s16 pos_1
- ...
- */
- u8 count;
- *pkt >> count;
- RemoteClient *client = getClient(pkt->getPeerId());
- if ((s16)pkt->getSize() < 1 + (int)count * 6) {
- throw con::InvalidIncomingDataException
- ("GOTBLOCKS length is too short");
- }
- for (u16 i = 0; i < count; i++) {
- v3s16 p;
- *pkt >> p;
- client->GotBlock(p);
- }
- }
- void Server::process_PlayerPos(RemotePlayer *player, PlayerSAO *playersao,
- NetworkPacket *pkt)
- {
- if (pkt->getRemainingBytes() < 12 + 12 + 4 + 4 + 4 + 1 + 1)
- return;
- v3s32 ps, ss;
- s32 f32pitch, f32yaw;
- u8 f32fov;
- *pkt >> ps;
- *pkt >> ss;
- *pkt >> f32pitch;
- *pkt >> f32yaw;
- f32 pitch = (f32)f32pitch / 100.0f;
- f32 yaw = (f32)f32yaw / 100.0f;
- u32 keyPressed = 0;
- // default behavior (in case an old client doesn't send these)
- f32 fov = 0;
- u8 wanted_range = 0;
- *pkt >> keyPressed;
- *pkt >> f32fov;
- fov = (f32)f32fov / 80.0f;
- *pkt >> wanted_range;
- v3f position((f32)ps.X / 100.0f, (f32)ps.Y / 100.0f, (f32)ps.Z / 100.0f);
- v3f speed((f32)ss.X / 100.0f, (f32)ss.Y / 100.0f, (f32)ss.Z / 100.0f);
- pitch = modulo360f(pitch);
- yaw = wrapDegrees_0_360(yaw);
- playersao->setBasePosition(position);
- player->setSpeed(speed);
- playersao->setPitch(pitch);
- playersao->setYaw(yaw);
- playersao->setFov(fov);
- playersao->setWantedRange(wanted_range);
- player->keyPressed = keyPressed;
- player->control.up = (keyPressed & 1);
- player->control.down = (keyPressed & 2);
- player->control.left = (keyPressed & 4);
- player->control.right = (keyPressed & 8);
- player->control.jump = (keyPressed & 16);
- player->control.aux1 = (keyPressed & 32);
- player->control.sneak = (keyPressed & 64);
- player->control.LMB = (keyPressed & 128);
- player->control.RMB = (keyPressed & 256);
- if (playersao->checkMovementCheat()) {
- // Call callbacks
- m_script->on_cheat(playersao, "moved_too_fast");
- SendMovePlayer(pkt->getPeerId());
- }
- }
- void Server::handleCommand_PlayerPos(NetworkPacket* pkt)
- {
- RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
- if (player == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- PlayerSAO *playersao = player->getPlayerSAO();
- if (playersao == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player object for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- // If player is dead we don't care of this packet
- if (playersao->isDead()) {
- verbosestream << "TOSERVER_PLAYERPOS: " << player->getName()
- << " is dead. Ignoring packet";
- return;
- }
- process_PlayerPos(player, playersao, pkt);
- }
- void Server::handleCommand_DeletedBlocks(NetworkPacket* pkt)
- {
- if (pkt->getSize() < 1)
- return;
- /*
- [0] u16 command
- [2] u8 count
- [3] v3s16 pos_0
- [3+6] v3s16 pos_1
- ...
- */
- u8 count;
- *pkt >> count;
- RemoteClient *client = getClient(pkt->getPeerId());
- if ((s16)pkt->getSize() < 1 + (int)count * 6) {
- throw con::InvalidIncomingDataException
- ("DELETEDBLOCKS length is too short");
- }
- for (u16 i = 0; i < count; i++) {
- v3s16 p;
- *pkt >> p;
- client->SetBlockNotSent(p);
- }
- }
- void Server::handleCommand_InventoryAction(NetworkPacket* pkt)
- {
- RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
- if (player == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- PlayerSAO *playersao = player->getPlayerSAO();
- if (playersao == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player object for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- // Strip command and create a stream
- std::string datastring(pkt->getString(0), pkt->getSize());
- verbosestream << "TOSERVER_INVENTORY_ACTION: data=" << datastring
- << std::endl;
- std::istringstream is(datastring, std::ios_base::binary);
- // Create an action
- InventoryAction *a = InventoryAction::deSerialize(is);
- if (!a) {
- infostream << "TOSERVER_INVENTORY_ACTION: "
- << "InventoryAction::deSerialize() returned NULL"
- << std::endl;
- return;
- }
- // If something goes wrong, this player is to blame
- RollbackScopeActor rollback_scope(m_rollback,
- std::string("player:")+player->getName());
- /*
- Note: Always set inventory not sent, to repair cases
- where the client made a bad prediction.
- */
- /*
- Handle restrictions and special cases of the move action
- */
- if (a->getType() == IAction::Move) {
- IMoveAction *ma = (IMoveAction*)a;
- ma->from_inv.applyCurrentPlayer(player->getName());
- ma->to_inv.applyCurrentPlayer(player->getName());
- setInventoryModified(ma->from_inv, false);
- setInventoryModified(ma->to_inv, false);
- bool from_inv_is_current_player =
- (ma->from_inv.type == InventoryLocation::PLAYER) &&
- (ma->from_inv.name == player->getName());
- bool to_inv_is_current_player =
- (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
- */
- if (ma->from_list == "craftpreview") {
- infostream << "Ignoring IMoveAction from "
- << (ma->from_inv.dump()) << ":" << ma->from_list
- << " to " << (ma->to_inv.dump()) << ":" << ma->to_list
- << " because src is " << ma->from_list << std::endl;
- delete a;
- return;
- }
- /*
- Disable moving items into craftresult and craftpreview
- */
- if (ma->to_list == "craftpreview" || ma->to_list == "craftresult") {
- infostream << "Ignoring IMoveAction from "
- << (ma->from_inv.dump()) << ":" << ma->from_list
- << " to " << (ma->to_inv.dump()) << ":" << ma->to_list
- << " because dst is " << ma->to_list << std::endl;
- delete a;
- return;
- }
- // Disallow moving items in elsewhere than player's inventory
- // if not allowed to interact
- if (!checkPriv(player->getName(), "interact") &&
- (!from_inv_is_current_player ||
- !to_inv_is_current_player)) {
- infostream << "Cannot move outside of player's inventory: "
- << "No interact privilege" << std::endl;
- delete a;
- return;
- }
- }
- /*
- Handle restrictions and special cases of the drop action
- */
- else if (a->getType() == IAction::Drop) {
- IDropAction *da = (IDropAction*)a;
- da->from_inv.applyCurrentPlayer(player->getName());
- setInventoryModified(da->from_inv, false);
- /*
- Disable dropping items out of craftpreview
- */
- if (da->from_list == "craftpreview") {
- infostream << "Ignoring IDropAction from "
- << (da->from_inv.dump()) << ":" << da->from_list
- << " because src is " << da->from_list << std::endl;
- delete a;
- return;
- }
- // Disallow dropping items if not allowed to interact
- if (!checkPriv(player->getName(), "interact")) {
- delete a;
- return;
- }
- // Disallow dropping items if dead
- if (playersao->isDead()) {
- infostream << "Ignoring IDropAction from "
- << (da->from_inv.dump()) << ":" << da->from_list
- << " because player is dead." << std::endl;
- delete a;
- return;
- }
- }
- /*
- Handle restrictions and special cases of the craft action
- */
- else if (a->getType() == IAction::Craft) {
- ICraftAction *ca = (ICraftAction*)a;
- ca->craft_inv.applyCurrentPlayer(player->getName());
- setInventoryModified(ca->craft_inv, false);
- //bool craft_inv_is_current_player =
- // (ca->craft_inv.type == InventoryLocation::PLAYER) &&
- // (ca->craft_inv.name == player->getName());
- // Disallow crafting if not allowed to interact
- if (!checkPriv(player->getName(), "interact")) {
- infostream << "Cannot craft: "
- << "No interact privilege" << std::endl;
- delete a;
- return;
- }
- }
- // Do the action
- a->apply(this, playersao, this);
- // Eat the action
- delete a;
- SendInventory(playersao);
- }
- void Server::handleCommand_ChatMessage(NetworkPacket* pkt)
- {
- /*
- u16 command
- u16 length
- wstring message
- */
- u16 len;
- *pkt >> len;
- std::wstring message;
- for (u16 i = 0; i < len; i++) {
- u16 tmp_wchar;
- *pkt >> tmp_wchar;
- message += (wchar_t)tmp_wchar;
- }
- RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
- if (player == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- // Get player name of this client
- std::string name = player->getName();
- std::wstring wname = narrow_to_wide(name);
- std::wstring answer_to_sender = handleChat(name, wname, message, true, player);
- if (!answer_to_sender.empty()) {
- // Send the answer to sender
- SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_NORMAL,
- answer_to_sender, wname));
- }
- }
- void Server::handleCommand_Damage(NetworkPacket* pkt)
- {
- u8 damage;
- *pkt >> damage;
- RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
- if (player == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- PlayerSAO *playersao = player->getPlayerSAO();
- if (playersao == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player object for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- if (g_settings->getBool("enable_damage")) {
- if (playersao->isDead()) {
- verbosestream << "Server::ProcessData(): Info: "
- "Ignoring damage as player " << player->getName()
- << " is already dead." << std::endl;
- return;
- }
- actionstream << player->getName() << " damaged by "
- << (int)damage << " hp at " << PP(playersao->getBasePosition() / BS)
- << std::endl;
- PlayerHPChangeReason reason(PlayerHPChangeReason::FALL);
- playersao->setHP(playersao->getHP() - damage, reason);
- SendPlayerHPOrDie(playersao, reason);
- }
- }
- void Server::handleCommand_Password(NetworkPacket* pkt)
- {
- if (pkt->getSize() != PASSWORD_SIZE * 2)
- return;
- std::string oldpwd;
- std::string newpwd;
- // Deny for clients using the new protocol
- RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
- if (client->net_proto_version >= 25) {
- infostream << "Server::handleCommand_Password(): Denying change: "
- << " Client protocol version for peer_id=" << pkt->getPeerId()
- << " too new!" << std::endl;
- return;
- }
- for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
- char c = pkt->getChar(i);
- if (c == 0)
- break;
- oldpwd += c;
- }
- for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
- char c = pkt->getChar(PASSWORD_SIZE + i);
- if (c == 0)
- break;
- newpwd += c;
- }
- RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
- if (player == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- if (!base64_is_valid(newpwd)) {
- infostream<<"Server: " << player->getName() <<
- " supplied invalid password hash" << std::endl;
- // Wrong old password supplied!!
- SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
- L"Invalid new password hash supplied. Password NOT changed."));
- return;
- }
- infostream << "Server: Client requests a password change from "
- << "'" << oldpwd << "' to '" << newpwd << "'" << std::endl;
- std::string playername = player->getName();
- std::string checkpwd;
- m_script->getAuth(playername, &checkpwd, NULL);
- if (oldpwd != checkpwd) {
- infostream << "Server: invalid old password" << std::endl;
- // Wrong old password supplied!!
- SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
- L"Invalid old password supplied. Password NOT changed."));
- return;
- }
- bool success = m_script->setPassword(playername, newpwd);
- if (success) {
- actionstream << player->getName() << " changes password" << std::endl;
- SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
- L"Password change successful."));
- } else {
- actionstream << player->getName() << " tries to change password but "
- << "it fails" << std::endl;
- SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
- L"Password change failed or unavailable."));
- }
- }
- void Server::handleCommand_PlayerItem(NetworkPacket* pkt)
- {
- if (pkt->getSize() < 2)
- return;
- RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
- if (player == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- PlayerSAO *playersao = player->getPlayerSAO();
- if (playersao == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player object for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- u16 item;
- *pkt >> item;
- playersao->setWieldIndex(item);
- }
- void Server::handleCommand_Respawn(NetworkPacket* pkt)
- {
- RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
- if (player == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- PlayerSAO *playersao = player->getPlayerSAO();
- assert(playersao);
- if (!playersao->isDead())
- return;
- RespawnPlayer(pkt->getPeerId());
- actionstream << player->getName() << " respawns at "
- << PP(playersao->getBasePosition() / BS) << std::endl;
- // ActiveObject is added to environment in AsyncRunStep after
- // 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)
- {
- /*
- [0] u16 command
- [2] u8 action
- [3] u16 item
- [5] u32 length of the next item (plen)
- [9] serialized PointedThing
- [9 + plen] player position information
- actions:
- 0: start digging (from undersurface) or use
- 1: stop digging (all parameters ignored)
- 2: digging completed
- 3: place block or item (to abovesurface)
- 4: use item
- 5: rightclick air ("activate")
- */
- u8 action;
- u16 item_i;
- *pkt >> action;
- *pkt >> item_i;
- std::istringstream tmp_is(pkt->readLongString(), std::ios::binary);
- PointedThing pointed;
- pointed.deSerialize(tmp_is);
- verbosestream << "TOSERVER_INTERACT: action=" << (int)action << ", item="
- << item_i << ", pointed=" << pointed.dump() << std::endl;
- RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
- if (player == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- PlayerSAO *playersao = player->getPlayerSAO();
- if (playersao == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player object for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- if (playersao->isDead()) {
- actionstream << "Server: NoCheat: " << player->getName()
- << " tried to interact while dead; ignoring." << std::endl;
- if (pointed.type == POINTEDTHING_NODE) {
- // Re-send block to revert change on client-side
- RemoteClient *client = getClient(pkt->getPeerId());
- v3s16 blockpos = getNodeBlockPos(pointed.node_undersurface);
- client->SetBlockNotSent(blockpos);
- }
- // Call callbacks
- m_script->on_cheat(playersao, "interacted_while_dead");
- return;
- }
- process_PlayerPos(player, playersao, pkt);
- v3f player_pos = playersao->getLastGoodPosition();
- // Update wielded item
- playersao->setWieldIndex(item_i);
- // Get pointed to node (undefined if not POINTEDTYPE_NODE)
- v3s16 p_under = pointed.node_undersurface;
- v3s16 p_above = pointed.node_abovesurface;
- // Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
- ServerActiveObject *pointed_object = NULL;
- if (pointed.type == POINTEDTHING_OBJECT) {
- pointed_object = m_env->getActiveObject(pointed.object_id);
- if (pointed_object == NULL) {
- verbosestream << "TOSERVER_INTERACT: "
- "pointed object is NULL" << std::endl;
- return;
- }
- }
- v3f pointed_pos_under = player_pos;
- v3f pointed_pos_above = player_pos;
- if (pointed.type == POINTEDTHING_NODE) {
- pointed_pos_under = intToFloat(p_under, BS);
- pointed_pos_above = intToFloat(p_above, BS);
- }
- else if (pointed.type == POINTEDTHING_OBJECT) {
- pointed_pos_under = pointed_object->getBasePosition();
- pointed_pos_above = pointed_pos_under;
- }
- /*
- Make sure the player is allowed to do it
- */
- if (!checkPriv(player->getName(), "interact")) {
- actionstream<<player->getName()<<" attempted to interact with "
- <<pointed.dump()<<" without 'interact' privilege"
- <<std::endl;
- // Re-send block to revert change on client-side
- RemoteClient *client = getClient(pkt->getPeerId());
- // Digging completed -> under
- if (action == 2) {
- v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
- client->SetBlockNotSent(blockpos);
- }
- // Placement -> above
- else if (action == 3) {
- v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
- client->SetBlockNotSent(blockpos);
- }
- return;
- }
- /*
- Check that target is reasonably close
- (only when digging or placing things)
- */
- static thread_local const bool enable_anticheat =
- !g_settings->getBool("disable_anticheat");
- if ((action == 0 || action == 2 || action == 3 || action == 4) &&
- enable_anticheat && !isSingleplayer()) {
- float d = player_pos.getDistanceFrom(pointed_pos_under);
- 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);
- return;
- }
- }
- /*
- If something goes wrong, this player is to blame
- */
- RollbackScopeActor rollback_scope(m_rollback,
- std::string("player:")+player->getName());
- /*
- 0: start digging or punch object
- */
- if (action == 0) {
- if (pointed.type == POINTEDTHING_NODE) {
- MapNode n(CONTENT_IGNORE);
- bool pos_ok;
- n = m_env->getMap().getNodeNoEx(p_under, &pos_ok);
- if (!pos_ok) {
- infostream << "Server: Not punching: Node not found."
- << " Adding block to emerge queue."
- << std::endl;
- m_emerge->enqueueBlockEmerge(pkt->getPeerId(),
- getNodeBlockPos(p_above), false);
- }
- if (n.getContent() != CONTENT_IGNORE)
- m_script->node_on_punch(p_under, n, playersao, pointed);
- // Cheat prevention
- playersao->noCheatDigStart(p_under);
- }
- else if (pointed.type == POINTEDTHING_OBJECT) {
- // Skip if object can't be interacted with anymore
- if (pointed_object->isGone())
- return;
- actionstream<<player->getName()<<" punches object "
- <<pointed.object_id<<": "
- <<pointed_object->getDescription()<<std::endl;
- ItemStack punchitem = playersao->getWieldedItemOrHand();
- ToolCapabilities toolcap =
- punchitem.getToolCapabilities(m_itemdef);
- v3f dir = (pointed_object->getBasePosition() -
- (playersao->getBasePosition() + playersao->getEyeOffset())
- ).normalize();
- float time_from_last_punch =
- playersao->resetTimeFromLastPunch();
- s16 src_original_hp = pointed_object->getHP();
- s16 dst_origin_hp = playersao->getHP();
- pointed_object->punch(dir, &toolcap, playersao,
- time_from_last_punch);
- // If the object is a player and its HP changed
- if (src_original_hp != pointed_object->getHP() &&
- pointed_object->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
- SendPlayerHPOrDie((PlayerSAO *)pointed_object,
- PlayerHPChangeReason(PlayerHPChangeReason::PLAYER_PUNCH, playersao));
- }
- // If the puncher is a player and its HP changed
- if (dst_origin_hp != playersao->getHP())
- SendPlayerHPOrDie(playersao,
- PlayerHPChangeReason(PlayerHPChangeReason::PLAYER_PUNCH, pointed_object));
- }
- } // action == 0
- /*
- 1: stop digging
- */
- else if (action == 1) {
- } // action == 1
- /*
- 2: Digging completed
- */
- else if (action == 2) {
- // Only digging of nodes
- if (pointed.type == POINTEDTHING_NODE) {
- bool pos_ok;
- MapNode n = m_env->getMap().getNodeNoEx(p_under, &pos_ok);
- if (!pos_ok) {
- infostream << "Server: Not finishing digging: Node not found."
- << " Adding block to emerge queue."
- << std::endl;
- m_emerge->enqueueBlockEmerge(pkt->getPeerId(),
- getNodeBlockPos(p_above), false);
- }
- /* Cheat prevention */
- bool is_valid_dig = true;
- if (enable_anticheat && !isSingleplayer()) {
- 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;
- // Call callbacks
- m_script->on_cheat(playersao, "finished_unknown_dig");
- }
- // Get player's wielded item
- ItemStack playeritem = playersao->getWieldedItemOrHand();
- 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) {
- InventoryList *hlist = playersao->getInventory()->getList("hand");
- const ToolCapabilities *tp = hlist
- ? &hlist->getItem(0).getToolCapabilities(m_itemdef)
- : m_itemdef->get("").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;
- // Call callbacks
- m_script->on_cheat(playersao, "dug_unbreakable");
- }
- // Check digging time
- // If already invalidated, we don't have to
- if (!is_valid_dig) {
- // Well not our problem then
- }
- // Clean and long dig
- else if (params.time > 2.0 && nocheat_t * 1.2 > params.time) {
- // All is good, but grab time from pool; don't care if
- // it's actually available
- playersao->getDigPool().grab(params.time);
- }
- // Short or laggy dig
- // Try getting the time from pool
- else if (playersao->getDigPool().grab(params.time)) {
- // All is good
- }
- // Dig not possible
- else {
- infostream << "Server: NoCheat: " << player->getName()
- << " completed digging " << PP(p_under)
- << "too fast; not digging." << std::endl;
- is_valid_dig = false;
- // Call callbacks
- m_script->on_cheat(playersao, "dug_too_fast");
- }
- }
- /* Actually dig node */
- if (is_valid_dig && n.getContent() != CONTENT_IGNORE)
- m_script->node_on_dig(p_under, n, playersao);
- v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
- RemoteClient *client = getClient(pkt->getPeerId());
- // 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
- client->SetBlockNotSent(blockpos);
- }
- else {
- client->ResendBlockIfOnWire(blockpos);
- }
- }
- } // action == 2
- /*
- 3: place block or right-click object
- */
- else if (action == 3) {
- ItemStack item = playersao->getWieldedItem();
- // Reset build time counter
- if (pointed.type == POINTEDTHING_NODE &&
- item.getDefinition(m_itemdef).type == ITEM_NODE)
- getClient(pkt->getPeerId())->m_time_from_building = 0.0;
- if (pointed.type == POINTEDTHING_OBJECT) {
- // Right click object
- // Skip if object can't be interacted with anymore
- if (pointed_object->isGone())
- return;
- actionstream << player->getName() << " right-clicks object "
- << pointed.object_id << ": "
- << pointed_object->getDescription() << std::endl;
- // Do stuff
- pointed_object->rightClick(playersao);
- }
- else if (m_script->item_OnPlace(
- item, playersao, pointed)) {
- // Placement was handled in lua
- // Apply returned ItemStack
- if (playersao->setWieldedItem(item)) {
- SendInventory(playersao);
- }
- }
- // If item has node placement prediction, always send the
- // blocks to make sure the client knows what exactly happened
- RemoteClient *client = getClient(pkt->getPeerId());
- v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
- v3s16 blockpos2 = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
- if (!item.getDefinition(m_itemdef).node_placement_prediction.empty()) {
- client->SetBlockNotSent(blockpos);
- if (blockpos2 != blockpos) {
- client->SetBlockNotSent(blockpos2);
- }
- }
- else {
- client->ResendBlockIfOnWire(blockpos);
- if (blockpos2 != blockpos) {
- client->ResendBlockIfOnWire(blockpos2);
- }
- }
- } // action == 3
- /*
- 4: use
- */
- else if (action == 4) {
- ItemStack item = playersao->getWieldedItem();
- actionstream << player->getName() << " uses " << item.name
- << ", pointing at " << pointed.dump() << std::endl;
- if (m_script->item_OnUse(
- item, playersao, pointed)) {
- // Apply returned ItemStack
- if (playersao->setWieldedItem(item)) {
- SendInventory(playersao);
- }
- }
- } // action == 4
- /*
- 5: rightclick air
- */
- else if (action == 5) {
- ItemStack item = playersao->getWieldedItem();
- actionstream << player->getName() << " activates "
- << item.name << std::endl;
- if (m_script->item_OnSecondaryUse(
- item, playersao)) {
- if( playersao->setWieldedItem(item)) {
- SendInventory(playersao);
- }
- }
- }
- /*
- Catch invalid actions
- */
- else {
- warningstream << "Server: Invalid action "
- << action << std::endl;
- }
- }
- void Server::handleCommand_RemovedSounds(NetworkPacket* pkt)
- {
- u16 num;
- *pkt >> num;
- for (u16 k = 0; k < num; k++) {
- s32 id;
- *pkt >> id;
- std::unordered_map<s32, ServerPlayingSound>::iterator i =
- m_playing_sounds.find(id);
- if (i == m_playing_sounds.end())
- continue;
- ServerPlayingSound &psound = i->second;
- psound.clients.erase(pkt->getPeerId());
- if (psound.clients.empty())
- m_playing_sounds.erase(i++);
- }
- }
- void Server::handleCommand_NodeMetaFields(NetworkPacket* pkt)
- {
- v3s16 p;
- std::string formname;
- u16 num;
- *pkt >> p >> formname >> num;
- StringMap fields;
- for (u16 k = 0; k < num; k++) {
- std::string fieldname;
- *pkt >> fieldname;
- fields[fieldname] = pkt->readLongString();
- }
- RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
- if (player == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- PlayerSAO *playersao = player->getPlayerSAO();
- if (playersao == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player object for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- // If something goes wrong, this player is to blame
- RollbackScopeActor rollback_scope(m_rollback,
- std::string("player:")+player->getName());
- // Check the target node for rollback data; leave others unnoticed
- RollbackNode rn_old(&m_env->getMap(), p, this);
- m_script->node_on_receive_fields(p, formname, fields, playersao);
- // Report rollback data
- RollbackNode rn_new(&m_env->getMap(), p, this);
- if (rollback() && rn_new != rn_old) {
- RollbackAction action;
- action.setSetNode(p, rn_old, rn_new);
- rollback()->reportAction(action);
- }
- }
- void Server::handleCommand_InventoryFields(NetworkPacket* pkt)
- {
- std::string client_formspec_name;
- u16 num;
- *pkt >> client_formspec_name >> num;
- StringMap fields;
- for (u16 k = 0; k < num; k++) {
- std::string fieldname;
- *pkt >> fieldname;
- fields[fieldname] = pkt->readLongString();
- }
- RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
- if (player == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- PlayerSAO *playersao = player->getPlayerSAO();
- if (playersao == NULL) {
- errorstream << "Server::ProcessData(): Canceling: "
- "No player object for peer_id=" << pkt->getPeerId()
- << " disconnecting peer!" << std::endl;
- DisconnectPeer(pkt->getPeerId());
- return;
- }
- if (client_formspec_name.empty()) { // pass through inventory submits
- m_script->on_playerReceiveFields(playersao, client_formspec_name, fields);
- return;
- }
- // verify that we displayed the formspec to the user
- const auto peer_state_iterator = m_formspec_state_data.find(pkt->getPeerId());
- if (peer_state_iterator != m_formspec_state_data.end()) {
- const std::string &server_formspec_name = peer_state_iterator->second;
- if (client_formspec_name == server_formspec_name) {
- if (fields["quit"] == "true")
- m_formspec_state_data.erase(peer_state_iterator);
- m_script->on_playerReceiveFields(playersao, client_formspec_name, fields);
- return;
- }
- actionstream << "'" << player->getName()
- << "' submitted formspec ('" << client_formspec_name
- << "') but the name of the formspec doesn't match the"
- " expected name ('" << server_formspec_name << "')";
- } else {
- actionstream << "'" << player->getName()
- << "' submitted formspec ('" << client_formspec_name
- << "') but server hasn't sent formspec to client";
- }
- actionstream << ", possible exploitation attempt" << std::endl;
- }
- void Server::handleCommand_FirstSrp(NetworkPacket* pkt)
- {
- RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
- ClientState cstate = client->getState();
- std::string playername = client->getName();
- std::string salt;
- std::string verification_key;
- std::string addr_s = getPeerAddress(pkt->getPeerId()).serializeString();
- u8 is_empty;
- *pkt >> salt >> verification_key >> is_empty;
- verbosestream << "Server: Got TOSERVER_FIRST_SRP from " << addr_s
- << ", with is_empty=" << (is_empty == 1) << std::endl;
- // Either this packet is sent because the user is new or to change the password
- if (cstate == CS_HelloSent) {
- if (!client->isMechAllowed(AUTH_MECHANISM_FIRST_SRP)) {
- actionstream << "Server: Client from " << addr_s
- << " tried to set password without being "
- << "authenticated, or the username being new." << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
- return;
- }
- if (!isSingleplayer() &&
- g_settings->getBool("disallow_empty_password") &&
- is_empty == 1) {
- actionstream << "Server: " << playername
- << " supplied empty password from " << addr_s << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_EMPTY_PASSWORD);
- return;
- }
- std::string initial_ver_key;
- initial_ver_key = encode_srp_verifier(verification_key, salt);
- m_script->createAuth(playername, initial_ver_key);
- acceptAuth(pkt->getPeerId(), false);
- } else {
- if (cstate < CS_SudoMode) {
- infostream << "Server::ProcessData(): Ignoring TOSERVER_FIRST_SRP from "
- << addr_s << ": " << "Client has wrong state " << cstate << "."
- << std::endl;
- return;
- }
- m_clients.event(pkt->getPeerId(), CSE_SudoLeave);
- std::string pw_db_field = encode_srp_verifier(verification_key, salt);
- bool success = m_script->setPassword(playername, pw_db_field);
- if (success) {
- actionstream << playername << " changes password" << std::endl;
- SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
- L"Password change successful."));
- } else {
- actionstream << playername << " tries to change password but "
- << "it fails" << std::endl;
- SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
- L"Password change failed or unavailable."));
- }
- }
- }
- void Server::handleCommand_SrpBytesA(NetworkPacket* pkt)
- {
- RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
- ClientState cstate = client->getState();
- bool wantSudo = (cstate == CS_Active);
- if (!((cstate == CS_HelloSent) || (cstate == CS_Active))) {
- actionstream << "Server: got SRP _A packet in wrong state "
- << cstate << " from "
- << getPeerAddress(pkt->getPeerId()).serializeString()
- << ". Ignoring." << std::endl;
- return;
- }
- if (client->chosen_mech != AUTH_MECHANISM_NONE) {
- actionstream << "Server: got SRP _A packet, while auth"
- << "is already going on with mech " << client->chosen_mech
- << " from " << getPeerAddress(pkt->getPeerId()).serializeString()
- << " (wantSudo=" << wantSudo << "). Ignoring." << std::endl;
- if (wantSudo) {
- DenySudoAccess(pkt->getPeerId());
- return;
- }
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
- return;
- }
- std::string bytes_A;
- u8 based_on;
- *pkt >> bytes_A >> based_on;
- infostream << "Server: TOSERVER_SRP_BYTES_A received with "
- << "based_on=" << int(based_on) << " and len_A="
- << bytes_A.length() << "." << std::endl;
- AuthMechanism chosen = (based_on == 0) ?
- AUTH_MECHANISM_LEGACY_PASSWORD : AUTH_MECHANISM_SRP;
- if (wantSudo) {
- if (!client->isSudoMechAllowed(chosen)) {
- actionstream << "Server: Player \"" << client->getName()
- << "\" at " << getPeerAddress(pkt->getPeerId()).serializeString()
- << " tried to change password using unallowed mech "
- << chosen << "." << std::endl;
- DenySudoAccess(pkt->getPeerId());
- return;
- }
- } else {
- if (!client->isMechAllowed(chosen)) {
- actionstream << "Server: Client tried to authenticate from "
- << getPeerAddress(pkt->getPeerId()).serializeString()
- << " using unallowed mech " << chosen << "." << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
- return;
- }
- }
- client->chosen_mech = chosen;
- std::string salt;
- std::string verifier;
- if (based_on == 0) {
- generate_srp_verifier_and_salt(client->getName(), client->enc_pwd,
- &verifier, &salt);
- } else if (!decode_srp_verifier_and_salt(client->enc_pwd, &verifier, &salt)) {
- // Non-base64 errors should have been catched in the init handler
- actionstream << "Server: User " << client->getName()
- << " tried to log in, but srp verifier field"
- << " was invalid (most likely invalid base64)." << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
- return;
- }
- char *bytes_B = 0;
- size_t len_B = 0;
- client->auth_data = srp_verifier_new(SRP_SHA256, SRP_NG_2048,
- client->getName().c_str(),
- (const unsigned char *) salt.c_str(), salt.size(),
- (const unsigned char *) verifier.c_str(), verifier.size(),
- (const unsigned char *) bytes_A.c_str(), bytes_A.size(),
- NULL, 0,
- (unsigned char **) &bytes_B, &len_B, NULL, NULL);
- if (!bytes_B) {
- actionstream << "Server: User " << client->getName()
- << " tried to log in, SRP-6a safety check violated in _A handler."
- << std::endl;
- if (wantSudo) {
- DenySudoAccess(pkt->getPeerId());
- return;
- }
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
- return;
- }
- NetworkPacket resp_pkt(TOCLIENT_SRP_BYTES_S_B, 0, pkt->getPeerId());
- resp_pkt << salt << std::string(bytes_B, len_B);
- Send(&resp_pkt);
- }
- void Server::handleCommand_SrpBytesM(NetworkPacket* pkt)
- {
- RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
- ClientState cstate = client->getState();
- bool wantSudo = (cstate == CS_Active);
- verbosestream << "Server: Received TOCLIENT_SRP_BYTES_M." << std::endl;
- if (!((cstate == CS_HelloSent) || (cstate == CS_Active))) {
- actionstream << "Server: got SRP _M packet in wrong state "
- << cstate << " from "
- << getPeerAddress(pkt->getPeerId()).serializeString()
- << ". Ignoring." << std::endl;
- return;
- }
- if (client->chosen_mech != AUTH_MECHANISM_SRP &&
- client->chosen_mech != AUTH_MECHANISM_LEGACY_PASSWORD) {
- actionstream << "Server: got SRP _M packet, while auth"
- << "is going on with mech " << client->chosen_mech
- << " from " << getPeerAddress(pkt->getPeerId()).serializeString()
- << " (wantSudo=" << wantSudo << "). Denying." << std::endl;
- if (wantSudo) {
- DenySudoAccess(pkt->getPeerId());
- return;
- }
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
- return;
- }
- std::string bytes_M;
- *pkt >> bytes_M;
- if (srp_verifier_get_session_key_length((SRPVerifier *) client->auth_data)
- != bytes_M.size()) {
- actionstream << "Server: User " << client->getName()
- << " at " << getPeerAddress(pkt->getPeerId()).serializeString()
- << " sent bytes_M with invalid length " << bytes_M.size() << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
- return;
- }
- unsigned char *bytes_HAMK = 0;
- srp_verifier_verify_session((SRPVerifier *) client->auth_data,
- (unsigned char *)bytes_M.c_str(), &bytes_HAMK);
- if (!bytes_HAMK) {
- if (wantSudo) {
- actionstream << "Server: User " << client->getName()
- << " at " << getPeerAddress(pkt->getPeerId()).serializeString()
- << " tried to change their password, but supplied wrong"
- << " (SRP) password for authentication." << std::endl;
- DenySudoAccess(pkt->getPeerId());
- return;
- }
- std::string ip = getPeerAddress(pkt->getPeerId()).serializeString();
- actionstream << "Server: User " << client->getName()
- << " at " << ip
- << " supplied wrong password (auth mechanism: SRP)."
- << std::endl;
- m_script->on_auth_failure(client->getName(), ip);
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_PASSWORD);
- return;
- }
- if (client->create_player_on_auth_success) {
- std::string playername = client->getName();
- m_script->createAuth(playername, client->enc_pwd);
- std::string checkpwd; // not used, but needed for passing something
- if (!m_script->getAuth(playername, &checkpwd, NULL)) {
- actionstream << "Server: " << playername << " cannot be authenticated"
- << " (auth handler does not work?)" << std::endl;
- DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
- return;
- }
- client->create_player_on_auth_success = false;
- }
- acceptAuth(pkt->getPeerId(), wantSudo);
- }
- /*
- * Mod channels
- */
- void Server::handleCommand_ModChannelJoin(NetworkPacket *pkt)
- {
- std::string channel_name;
- *pkt >> channel_name;
- NetworkPacket resp_pkt(TOCLIENT_MODCHANNEL_SIGNAL, 1 + 2 + channel_name.size(),
- pkt->getPeerId());
- // Send signal to client to notify join succeed or not
- if (g_settings->getBool("enable_mod_channels") &&
- m_modchannel_mgr->joinChannel(channel_name, pkt->getPeerId())) {
- resp_pkt << (u8) MODCHANNEL_SIGNAL_JOIN_OK;
- infostream << "Peer " << pkt->getPeerId() << " joined channel " << channel_name
- << std::endl;
- }
- else {
- resp_pkt << (u8)MODCHANNEL_SIGNAL_JOIN_FAILURE;
- infostream << "Peer " << pkt->getPeerId() << " tried to join channel "
- << channel_name << ", but was already registered." << std::endl;
- }
- resp_pkt << channel_name;
- Send(&resp_pkt);
- }
- void Server::handleCommand_ModChannelLeave(NetworkPacket *pkt)
- {
- std::string channel_name;
- *pkt >> channel_name;
- NetworkPacket resp_pkt(TOCLIENT_MODCHANNEL_SIGNAL, 1 + 2 + channel_name.size(),
- pkt->getPeerId());
- // Send signal to client to notify join succeed or not
- if (g_settings->getBool("enable_mod_channels") &&
- m_modchannel_mgr->leaveChannel(channel_name, pkt->getPeerId())) {
- resp_pkt << (u8)MODCHANNEL_SIGNAL_LEAVE_OK;
- infostream << "Peer " << pkt->getPeerId() << " left channel " << channel_name
- << std::endl;
- } else {
- resp_pkt << (u8) MODCHANNEL_SIGNAL_LEAVE_FAILURE;
- infostream << "Peer " << pkt->getPeerId() << " left channel " << channel_name
- << ", but was not registered." << std::endl;
- }
- resp_pkt << channel_name;
- Send(&resp_pkt);
- }
- void Server::handleCommand_ModChannelMsg(NetworkPacket *pkt)
- {
- std::string channel_name, channel_msg;
- *pkt >> channel_name >> channel_msg;
- verbosestream << "Mod channel message received from peer " << pkt->getPeerId()
- << " on channel " << channel_name << " message: " << channel_msg << std::endl;
- // If mod channels are not enabled, discard message
- if (!g_settings->getBool("enable_mod_channels")) {
- return;
- }
- // If channel not registered, signal it and ignore message
- if (!m_modchannel_mgr->channelRegistered(channel_name)) {
- NetworkPacket resp_pkt(TOCLIENT_MODCHANNEL_SIGNAL, 1 + 2 + channel_name.size(),
- pkt->getPeerId());
- resp_pkt << (u8)MODCHANNEL_SIGNAL_CHANNEL_NOT_REGISTERED << channel_name;
- Send(&resp_pkt);
- return;
- }
- // @TODO: filter, rate limit
- broadcastModChannelMessage(channel_name, channel_msg, pkt->getPeerId());
- }
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