minetest.git - modified minetest for gpcfs purposes

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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 "server.h" #include "log.h" #include "content_abm.h" #include "content_sao.h" #include "emerge.h" #include "nodedef.h" #include "player.h" #include "rollback_interface.h" #include "scripting_game.h" #include "settings.h" #include "tool.h" #include "version.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) 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; // On this handler at least protocol version 25 is required if (net_proto_version < 25 || 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; } if (g_settings->getBool("strict_protocol_version_checking")) { if (net_proto_version != LATEST_PROTOCOL_VERSION) { actionstream << "Server: A mismatched (strict) 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) == false) { 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.c_str()); 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 if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") && !checkPriv(playername, "server") && !checkPriv(playername, "ban") && !checkPriv(playername, "privs") && !checkPriv(playername, "password") && playername != g_settings->get("name")) { 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 = getSRPVerifier(playerName, default_password); auth_mechs |= AUTH_MECHANISM_SRP; } } /* 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_Init_Legacy(NetworkPacket* pkt) { // [0] u8 SER_FMT_VER_HIGHEST_READ // [1] u8[20] player_name // [21] u8[28] password <--- can be sent without this, from old versions if (pkt->getSize() < 1+PLAYERNAME_SIZE) 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_LEGACY 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_Legacy(pkt->getPeerId(), L"Running in simple singleplayer mode."); return; } // First byte after command is maximum supported // serialization version u8 client_max; *pkt >> client_max; u8 our_max = SER_FMT_VER_HIGHEST_READ; // Use the highest version supported by both int deployed = std::min(client_max, our_max); // If it's lower than the lowest supported, give up. if (deployed < SER_FMT_VER_LOWEST) deployed = SER_FMT_VER_INVALID; if (deployed == 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_Legacy(pkt->getPeerId(), std::wstring( L"Your client's version is not supported.\n" L"Server version is ") + utf8_to_wide(g_version_string) + L"." ); return; } client->setPendingSerializationVersion(deployed); /* Read and check network protocol version */ u16 min_net_proto_version = 0; if (pkt->getSize() >= 1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2) min_net_proto_version = pkt->getU16(1 + PLAYERNAME_SIZE + PASSWORD_SIZE); // Use same version as minimum and maximum if maximum version field // doesn't exist (backwards compatibility) u16 max_net_proto_version = min_net_proto_version; if (pkt->getSize() >= 1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2 + 2) max_net_proto_version = pkt->getU16(1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2); // Start with client's maximum version u16 net_proto_version = max_net_proto_version; // 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; } // The client will send up to date init packet, ignore this one if (net_proto_version >= 25) return; 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 (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_Legacy(pkt->getPeerId(), std::wstring( L"Your client's version is not supported.\n" L"Server version is ") + utf8_to_wide(g_version_string) + L",\n" + L"server's PROTOCOL_VERSION is " + utf8_to_wide(itos(SERVER_PROTOCOL_VERSION_MIN)) + L"..." + utf8_to_wide(itos(SERVER_PROTOCOL_VERSION_MAX)) + L", client's PROTOCOL_VERSION is " + utf8_to_wide(itos(min_net_proto_version)) + L"..." + utf8_to_wide(itos(max_net_proto_version)) ); return; } if (g_settings->getBool("strict_protocol_version_checking")) { if (net_proto_version != LATEST_PROTOCOL_VERSION) { actionstream << "Server: A mismatched (strict) client tried to " << "connect from " << addr_s << std::endl; DenyAccess_Legacy(pkt->getPeerId(), std::wstring( L"Your client's version is not supported.\n" L"Server version is ") + utf8_to_wide(g_version_string) + L",\n" + L"server's PROTOCOL_VERSION (strict) is " + utf8_to_wide(itos(LATEST_PROTOCOL_VERSION)) + L", client's PROTOCOL_VERSION is " + utf8_to_wide(itos(min_net_proto_version)) + L"..." + utf8_to_wide(itos(max_net_proto_version)) ); return; } } /* Set up player */ char playername[PLAYERNAME_SIZE]; unsigned int playername_length = 0; for (; playername_length < PLAYERNAME_SIZE; playername_length++ ) { playername[playername_length] = pkt->getChar(1+playername_length); if (pkt->getChar(1+playername_length) == 0) break; } if (playername_length == PLAYERNAME_SIZE) { actionstream << "Server: Player with name exceeding max length " << "tried to connect from " << addr_s << std::endl; DenyAccess_Legacy(pkt->getPeerId(), L"Name too long"); return; } if (playername[0]=='\0') { actionstream << "Server: Player with an empty name " << "tried to connect from " << addr_s << std::endl; DenyAccess_Legacy(pkt->getPeerId(), L"Empty name"); return; } if (string_allowed(playername, PLAYERNAME_ALLOWED_CHARS) == false) { actionstream << "Server: Player with an invalid name " << "tried to connect from " << addr_s << std::endl; DenyAccess_Legacy(pkt->getPeerId(), L"Name contains unallowed characters"); return; } if (!isSingleplayer() && strcasecmp(playername, "singleplayer") == 0) { actionstream << "Server: Player with the name \"singleplayer\" " << "tried to connect from " << addr_s << std::endl; DenyAccess_Legacy(pkt->getPeerId(), L"Name is not allowed"); 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_Legacy(pkt->getPeerId(), utf8_to_wide(reason.c_str())); return; } } infostream<<"Server: New connection: \""<<playername<<"\" from " <<addr_s<<" (peer_id="<<pkt->getPeerId()<<")"<<std::endl; // Get password char given_password[PASSWORD_SIZE]; if (pkt->getSize() < 1 + PLAYERNAME_SIZE + PASSWORD_SIZE) { // old version - assume blank password given_password[0] = 0; } else { for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) { given_password[i] = pkt->getChar(21 + i); } given_password[PASSWORD_SIZE - 1] = 0; } if (!base64_is_valid(given_password)) { actionstream << "Server: " << playername << " supplied invalid password hash" << std::endl; DenyAccess_Legacy(pkt->getPeerId(), L"Invalid password hash"); return; } // Enforce user limit. // Don't enforce for users that have some admin right if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") && !checkPriv(playername, "server") && !checkPriv(playername, "ban") && !checkPriv(playername, "privs") && !checkPriv(playername, "password") && playername != g_settings->get("name")) { actionstream << "Server: " << playername << " tried to join, but there" << " are already max_users=" << g_settings->getU16("max_users") << " players." << std::endl; DenyAccess_Legacy(pkt->getPeerId(), L"Too many users."); return; } std::string checkpwd; // Password hash to check against bool has_auth = m_script->getAuth(playername, &checkpwd, NULL); // If no authentication info exists for user, create it if (!has_auth) { if (!isSingleplayer() && g_settings->getBool("disallow_empty_password") && std::string(given_password) == "") { actionstream << "Server: " << playername << " supplied empty password" << std::endl; DenyAccess_Legacy(pkt->getPeerId(), L"Empty passwords are " L"disallowed. Set a password and try again."); return; } std::string raw_default_password = g_settings->get("default_password"); std::string initial_password = translatePassword(playername, raw_default_password); // If default_password is empty, allow any initial password if (raw_default_password.length() == 0) initial_password = given_password; m_script->createAuth(playername, initial_password); } has_auth = m_script->getAuth(playername, &checkpwd, NULL); if (!has_auth) { actionstream << "Server: " << playername << " cannot be authenticated" << " (auth handler does not work?)" << std::endl; DenyAccess_Legacy(pkt->getPeerId(), L"Not allowed to login"); return; } if (given_password != checkpwd) { actionstream << "Server: " << playername << " supplied wrong password" << std::endl; DenyAccess_Legacy(pkt->getPeerId(), L"Wrong password"); return; } RemotePlayer *player = static_cast<RemotePlayer*>(m_env->getPlayer(playername)); if (player && player->peer_id != 0) { actionstream << "Server: " << playername << ": Failed to emerge player" << " (player allocated to an another client)" << std::endl; DenyAccess_Legacy(pkt->getPeerId(), L"Another client is connected with this " L"name. If your client closed unexpectedly, try again in " L"a minute."); } m_clients.setPlayerName(pkt->getPeerId(), playername); /* Answer with a TOCLIENT_INIT */ NetworkPacket resp_pkt(TOCLIENT_INIT_LEGACY, 1 + 6 + 8 + 4, pkt->getPeerId()); resp_pkt << (u8) deployed << (v3s16) floatToInt(v3f(0,0,0), BS) << (u64) m_env->getServerMap().getSeed() << g_settings->getFloat("dedicated_server_step"); Send(&resp_pkt); m_clients.event(pkt->getPeerId(), CSE_InitLegacy); } 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()); ///// begin compatibility code PlayerSAO* playersao = NULL; if (protocol_version <= 22) { playersao = StageTwoClientInit(pkt->getPeerId()); if (playersao == NULL) { actionstream << "TOSERVER_INIT2 stage 2 client init failed for peer " << pkt->getPeerId() << std::endl; return; } } ///// end compatibility code /* 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()); // 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); ///// begin compatibility code if (protocol_version <= 22) { m_clients.event(pkt->getPeerId(), CSE_SetClientReady); m_script->on_joinplayer(playersao); } ///// end compatibility code // Warnings about protocol version can be issued here if (getClient(pkt->getPeerId())->net_proto_version < LATEST_PROTOCOL_VERSION) { SendChatMessage(pkt->getPeerId(), L"# Server: WARNING: YOUR CLIENT'S " L"VERSION MAY NOT BE FULLY COMPATIBLE 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_ReceivedMedia(NetworkPacket* pkt) { } void Server::handleCommand_ClientReady(NetworkPacket* pkt) { u16 peer_id = pkt->getPeerId(); u16 peer_proto_ver = getClient(peer_id, CS_InitDone)->net_proto_version; // clients <= protocol version 22 did not send ready message, // they're already initialized if (peer_proto_ver <= 22) { infostream << "Client sent message not expected by a " << "client using protocol version <= 22," << "disconnecting peer_id: " << peer_id << std::endl; m_con.DisconnectPeer(peer_id); return; } PlayerSAO* playersao = StageTwoClientInit(peer_id); if (playersao == NULL) { actionstream << "TOSERVER_CLIENT_READY stage 2 client init failed for peer_id: " << peer_id << std::endl; m_con.DisconnectPeer(peer_id); return; } if (pkt->getSize() < 8) { errorstream << "TOSERVER_CLIENT_READY client sent inconsistent data, disconnecting peer_id: " << peer_id << std::endl; m_con.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); m_clients.event(peer_id, CSE_SetClientReady); m_script->on_joinplayer(playersao); } 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()); for (u16 i = 0; i < count; i++) { if ((s16)pkt->getSize() < 1 + (i + 1) * 6) throw con::InvalidIncomingDataException ("GOTBLOCKS length is too short"); v3s16 p; *pkt >> p; client->GotBlock(p); } } void Server::handleCommand_PlayerPos(NetworkPacket* pkt) { if (pkt->getSize() < 12 + 12 + 4 + 4) return; v3s32 ps, ss; s32 f32pitch, f32yaw; *pkt >> ps; *pkt >> ss; *pkt >> f32pitch; *pkt >> f32yaw; f32 pitch = (f32)f32pitch / 100.0; f32 yaw = (f32)f32yaw / 100.0; u32 keyPressed = 0; if (pkt->getSize() >= 12 + 12 + 4 + 4 + 4) *pkt >> keyPressed; v3f position((f32)ps.X / 100.0, (f32)ps.Y / 100.0, (f32)ps.Z / 100.0); v3f speed((f32)ss.X / 100.0, (f32)ss.Y / 100.0, (f32)ss.Z / 100.0); pitch = modulo360f(pitch); yaw = modulo360f(yaw); Player *player = m_env->getPlayer(pkt->getPeerId()); if (player == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.DisconnectPeer(pkt->getPeerId()); return; } // If player is dead we don't care of this packet if (player->isDead()) { verbosestream << "TOSERVER_PLAYERPOS: " << player->getName() << " is dead. Ignoring packet"; return; } PlayerSAO *playersao = player->getPlayerSAO(); if (playersao == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player object for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.DisconnectPeer(pkt->getPeerId()); return; } player->setPosition(position); player->setSpeed(speed); player->setPitch(pitch); player->setYaw(yaw); 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_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()); for (u16 i = 0; i < count; i++) { if ((s16)pkt->getSize() < 1 + (i + 1) * 6) throw con::InvalidIncomingDataException ("DELETEDBLOCKS length is too short"); v3s16 p; *pkt >> p; client->SetBlockNotSent(p); } } void Server::handleCommand_InventoryAction(NetworkPacket* pkt) { Player *player = m_env->getPlayer(pkt->getPeerId()); if (player == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.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; m_con.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 == NULL) { 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()); /* 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; } } /* 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; } Player *player = m_env->getPlayer(pkt->getPeerId()); if (player == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.DisconnectPeer(pkt->getPeerId()); return; } // If something goes wrong, this player is to blame RollbackScopeActor rollback_scope(m_rollback, std::string("player:")+player->getName()); // Get player name of this client std::wstring name = narrow_to_wide(player->getName()); // Run script hook bool ate = m_script->on_chat_message(player->getName(), wide_to_narrow(message)); // If script ate the message, don't proceed if (ate) return; // Line to send to players std::wstring line; // Whether to send to the player that sent the line bool send_to_sender_only = false; // Commands are implemented in Lua, so only catch invalid // commands that were not "eaten" and send an error back if (message[0] == L'/') { message = message.substr(1); send_to_sender_only = true; if (message.length() == 0) line += L"-!- Empty command"; else line += L"-!- Invalid command: " + str_split(message, L' ')[0]; } else { if (checkPriv(player->getName(), "shout")) { line += L"<"; line += name; line += L"> "; line += message; } else { line += L"-!- You don't have permission to shout."; send_to_sender_only = true; } } if (line != L"") { /* Send the message to sender */ if (send_to_sender_only) { SendChatMessage(pkt->getPeerId(), line); } /* Send the message to others */ else { actionstream << "CHAT: " << wide_to_narrow(line)<<std::endl; std::vector<u16> clients = m_clients.getClientIDs(); for (std::vector<u16>::iterator i = clients.begin(); i != clients.end(); ++i) { if (*i != pkt->getPeerId()) SendChatMessage(*i, line); } } } } void Server::handleCommand_Damage(NetworkPacket* pkt) { u8 damage; *pkt >> damage; Player *player = m_env->getPlayer(pkt->getPeerId()); if (player == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.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; m_con.DisconnectPeer(pkt->getPeerId()); return; } if (g_settings->getBool("enable_damage")) { actionstream << player->getName() << " damaged by " << (int)damage << " hp at " << PP(player->getPosition() / BS) << std::endl; playersao->setHP(playersao->getHP() - damage); SendPlayerHPOrDie(playersao); } } void Server::handleCommand_Breath(NetworkPacket* pkt) { u16 breath; *pkt >> breath; Player *player = m_env->getPlayer(pkt->getPeerId()); if (player == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.DisconnectPeer(pkt->getPeerId()); return; } /* * If player is dead, we don't need to update the breath * He is dead ! */ if (player->isDead()) { verbosestream << "TOSERVER_BREATH: " << player->getName() << " is dead. Ignoring packet"; return; } PlayerSAO *playersao = player->getPlayerSAO(); if (playersao == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player object for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.DisconnectPeer(pkt->getPeerId()); return; } playersao->setBreath(breath); SendPlayerBreath(pkt->getPeerId()); } 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; } Player *player = m_env->getPlayer(pkt->getPeerId()); if (player == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.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(), 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(), 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(), L"Password change successful."); } else { actionstream << player->getName() << " tries to change password but " << "it fails" << std::endl; SendChatMessage(pkt->getPeerId(), L"Password change failed or unavailable."); } } void Server::handleCommand_PlayerItem(NetworkPacket* pkt) { if (pkt->getSize() < 2) return; Player *player = m_env->getPlayer(pkt->getPeerId()); if (player == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.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; m_con.DisconnectPeer(pkt->getPeerId()); return; } u16 item; *pkt >> item; playersao->setWieldIndex(item); } void Server::handleCommand_Respawn(NetworkPacket* pkt) { Player *player = m_env->getPlayer(pkt->getPeerId()); if (player == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.DisconnectPeer(pkt->getPeerId()); return; } if (!player->isDead()) return; RespawnPlayer(pkt->getPeerId()); actionstream << player->getName() << " respawns at " << PP(player->getPosition()/BS) << std::endl; // ActiveObject is added to environment in AsyncRunStep after // the previous addition has been successfully removed } void Server::handleCommand_Interact(NetworkPacket* pkt) { std::string datastring(pkt->getString(0), pkt->getSize()); std::istringstream is(datastring, std::ios_base::binary); /* [0] u16 command [2] u8 action [3] u16 item [5] u32 length of the next item [9] serialized PointedThing 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 */ u8 action = readU8(is); u16 item_i = readU16(is); std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary); PointedThing pointed; pointed.deSerialize(tmp_is); verbosestream << "TOSERVER_INTERACT: action=" << (int)action << ", item=" << item_i << ", pointed=" << pointed.dump() << std::endl; Player *player = m_env->getPlayer(pkt->getPeerId()); if (player == NULL) { errorstream << "Server::ProcessData(): Canceling: " "No player for peer_id=" << pkt->getPeerId() << " disconnecting peer!" << std::endl; m_con.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; m_con.DisconnectPeer(pkt->getPeerId()); return; } if (player->isDead()) { verbosestream << "TOSERVER_INTERACT: " << player->getName() << " is dead. Ignoring packet"; return; } 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; } /* Check that target is reasonably close (only when digging or placing things) */ if (action == 0 || action == 2 || action == 3) { float d = player_pos.getDistanceFrom(pointed_pos_under); float max_d = BS * 14; // Just some large enough value if (d > max_d) { actionstream << "Player " << player->getName() << " tried to access " << pointed.dump() << " from too far: " << "d=" << d <<", max_d=" << max_d << ". ignoring." << std::endl; // Re-send block to revert change on client-side RemoteClient *client = getClient(pkt->getPeerId()); v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS)); client->SetBlockNotSent(blockpos); // Call callbacks m_script->on_cheat(playersao, "interacted_too_far"); // Do nothing else return; } } /* 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 if (action == 3) { v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, 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) { /* NOTE: This can be used in the future to check if somebody is cheating, by checking the timing. */ MapNode n(CONTENT_IGNORE); bool pos_ok; n = m_env->getMap().getNodeNoEx(p_under, &pos_ok); if (pos_ok) n = m_env->getMap().getNodeNoEx(p_under, &pos_ok);


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