3 Copyright (C) 2015 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #include <chatmessage.h>
24 #include "content_sao.h"
29 #include "rollback_interface.h"
30 #include "scripting_server.h"
34 #include "network/networkprotocol.h"
35 #include "network/serveropcodes.h"
36 #include "util/auth.h"
37 #include "util/base64.h"
38 #include "util/pointedthing.h"
39 #include "util/serialize.h"
42 void Server::handleCommand_Deprecated(NetworkPacket* pkt)
44 infostream << "Server: " << toServerCommandTable[pkt->getCommand()].name
45 << " not supported anymore" << std::endl;
48 void Server::handleCommand_Init(NetworkPacket* pkt)
51 if(pkt->getSize() < 1)
54 RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
58 Address address = getPeerAddress(pkt->getPeerId());
59 addr_s = address.serializeString();
61 catch (con::PeerNotFoundException &e) {
63 * no peer for this packet found
64 * most common reason is peer timeout, e.g. peer didn't
65 * respond for some time, your server was overloaded or
68 infostream << "Server::ProcessData(): Canceling: peer "
69 << pkt->getPeerId() << " not found" << std::endl;
73 // If net_proto_version is set, this client has already been handled
74 if (client->getState() > CS_Created) {
75 verbosestream << "Server: Ignoring multiple TOSERVER_INITs from "
76 << addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
80 verbosestream << "Server: Got TOSERVER_INIT from " << addr_s << " (peer_id="
81 << pkt->getPeerId() << ")" << std::endl;
83 // Do not allow multiple players in simple singleplayer mode.
84 // This isn't a perfect way to do it, but will suffice for now
85 if (m_simple_singleplayer_mode && m_clients.getClientIDs().size() > 1) {
86 infostream << "Server: Not allowing another client (" << addr_s
87 << ") to connect in simple singleplayer mode" << std::endl;
88 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SINGLEPLAYER);
92 // First byte after command is maximum supported
93 // serialization version
96 u16 min_net_proto_version = 0;
97 u16 max_net_proto_version;
98 std::string playerName;
100 *pkt >> client_max >> supp_compr_modes >> min_net_proto_version
101 >> max_net_proto_version >> playerName;
103 u8 our_max = SER_FMT_VER_HIGHEST_READ;
104 // Use the highest version supported by both
105 u8 depl_serial_v = std::min(client_max, our_max);
106 // If it's lower than the lowest supported, give up.
107 if (depl_serial_v < SER_FMT_VER_LOWEST_READ)
108 depl_serial_v = SER_FMT_VER_INVALID;
110 if (depl_serial_v == SER_FMT_VER_INVALID) {
111 actionstream << "Server: A mismatched client tried to connect from "
112 << addr_s << std::endl;
113 infostream<<"Server: Cannot negotiate serialization version with "
114 << addr_s << std::endl;
115 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
119 client->setPendingSerializationVersion(depl_serial_v);
122 Read and check network protocol version
125 u16 net_proto_version = 0;
127 // Figure out a working version if it is possible at all
128 if (max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
129 min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX) {
130 // If maximum is larger than our maximum, go with our maximum
131 if (max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
132 net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
133 // Else go with client's maximum
135 net_proto_version = max_net_proto_version;
138 verbosestream << "Server: " << addr_s << ": Protocol version: min: "
139 << min_net_proto_version << ", max: " << max_net_proto_version
140 << ", chosen: " << net_proto_version << std::endl;
142 client->net_proto_version = net_proto_version;
144 // On this handler at least protocol version 25 is required
145 if (net_proto_version < 25 ||
146 net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
147 net_proto_version > SERVER_PROTOCOL_VERSION_MAX) {
148 actionstream << "Server: A mismatched client tried to connect from "
149 << addr_s << std::endl;
150 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
154 if (g_settings->getBool("strict_protocol_version_checking")) {
155 if (net_proto_version != LATEST_PROTOCOL_VERSION) {
156 actionstream << "Server: A mismatched (strict) client tried to "
157 << "connect from " << addr_s << std::endl;
158 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
166 const char* playername = playerName.c_str();
168 size_t pns = playerName.size();
169 if (pns == 0 || pns > PLAYERNAME_SIZE) {
170 actionstream << "Server: Player with "
171 << ((pns > PLAYERNAME_SIZE) ? "a too long" : "an empty")
172 << " name tried to connect from " << addr_s << std::endl;
173 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_NAME);
177 if (string_allowed(playerName, PLAYERNAME_ALLOWED_CHARS) == false) {
178 actionstream << "Server: Player with an invalid name "
179 << "tried to connect from " << addr_s << std::endl;
180 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_CHARS_IN_NAME);
184 m_clients.setPlayerName(pkt->getPeerId(), playername);
185 //TODO (later) case insensitivity
187 std::string legacyPlayerNameCasing = playerName;
189 if (!isSingleplayer() && strcasecmp(playername, "singleplayer") == 0) {
190 actionstream << "Server: Player with the name \"singleplayer\" "
191 << "tried to connect from " << addr_s << std::endl;
192 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_NAME);
198 if (m_script->on_prejoinplayer(playername, addr_s, &reason)) {
199 actionstream << "Server: Player with the name \"" << playerName << "\" "
200 << "tried to connect from " << addr_s << " "
201 << "but it was disallowed for the following reason: "
202 << reason << std::endl;
203 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_CUSTOM_STRING,
209 infostream << "Server: New connection: \"" << playerName << "\" from "
210 << addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
212 // Enforce user limit.
213 // Don't enforce for users that have some admin right
214 if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") &&
215 !checkPriv(playername, "server") &&
216 !checkPriv(playername, "ban") &&
217 !checkPriv(playername, "privs") &&
218 !checkPriv(playername, "password") &&
219 playername != g_settings->get("name")) {
220 actionstream << "Server: " << playername << " tried to join from "
221 << addr_s << ", but there" << " are already max_users="
222 << g_settings->getU16("max_users") << " players." << std::endl;
223 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_TOO_MANY_USERS);
228 Compose auth methods for answer
230 std::string encpwd; // encrypted Password field for the user
231 bool has_auth = m_script->getAuth(playername, &encpwd, NULL);
234 client->chosen_mech = AUTH_MECHANISM_NONE;
237 std::vector<std::string> pwd_components = str_split(encpwd, '#');
238 if (pwd_components.size() == 4) {
239 if (pwd_components[1] == "1") { // 1 means srp
240 auth_mechs |= AUTH_MECHANISM_SRP;
241 client->enc_pwd = encpwd;
243 actionstream << "User " << playername
244 << " tried to log in, but password field"
245 << " was invalid (unknown mechcode)." << std::endl;
246 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
249 } else if (base64_is_valid(encpwd)) {
250 auth_mechs |= AUTH_MECHANISM_LEGACY_PASSWORD;
251 client->enc_pwd = encpwd;
253 actionstream << "User " << playername
254 << " tried to log in, but password field"
255 << " was invalid (invalid base64)." << std::endl;
256 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
260 std::string default_password = g_settings->get("default_password");
261 if (default_password.length() == 0) {
262 auth_mechs |= AUTH_MECHANISM_FIRST_SRP;
264 // Take care of default passwords.
265 client->enc_pwd = get_encoded_srp_verifier(playerName, default_password);
266 auth_mechs |= AUTH_MECHANISM_SRP;
267 // Allocate player in db, but only on successful login.
268 client->create_player_on_auth_success = true;
273 Answer with a TOCLIENT_HELLO
276 verbosestream << "Sending TOCLIENT_HELLO with auth method field: "
277 << auth_mechs << std::endl;
279 NetworkPacket resp_pkt(TOCLIENT_HELLO, 1 + 4
280 + legacyPlayerNameCasing.size(), pkt->getPeerId());
282 u16 depl_compress_mode = NETPROTO_COMPRESSION_NONE;
283 resp_pkt << depl_serial_v << depl_compress_mode << net_proto_version
284 << auth_mechs << legacyPlayerNameCasing;
288 client->allowed_auth_mechs = auth_mechs;
289 client->setDeployedCompressionMode(depl_compress_mode);
291 m_clients.event(pkt->getPeerId(), CSE_Hello);
294 void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
296 // [0] u8 SER_FMT_VER_HIGHEST_READ
297 // [1] u8[20] player_name
298 // [21] u8[28] password <--- can be sent without this, from old versions
300 if (pkt->getSize() < 1+PLAYERNAME_SIZE)
303 RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
307 Address address = getPeerAddress(pkt->getPeerId());
308 addr_s = address.serializeString();
310 catch (con::PeerNotFoundException &e) {
312 * no peer for this packet found
313 * most common reason is peer timeout, e.g. peer didn't
314 * respond for some time, your server was overloaded or
317 infostream << "Server::ProcessData(): Canceling: peer "
318 << pkt->getPeerId() << " not found" << std::endl;
322 // If net_proto_version is set, this client has already been handled
323 if (client->getState() > CS_Created) {
324 verbosestream << "Server: Ignoring multiple TOSERVER_INITs from "
325 << addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
329 verbosestream << "Server: Got TOSERVER_INIT_LEGACY from " << addr_s << " (peer_id="
330 << pkt->getPeerId() << ")" << std::endl;
332 // Do not allow multiple players in simple singleplayer mode.
333 // This isn't a perfect way to do it, but will suffice for now
334 if (m_simple_singleplayer_mode && m_clients.getClientIDs().size() > 1) {
335 infostream << "Server: Not allowing another client (" << addr_s
336 << ") to connect in simple singleplayer mode" << std::endl;
337 DenyAccess_Legacy(pkt->getPeerId(), L"Running in simple singleplayer mode.");
341 // First byte after command is maximum supported
342 // serialization version
347 u8 our_max = SER_FMT_VER_HIGHEST_READ;
348 // Use the highest version supported by both
349 int deployed = std::min(client_max, our_max);
350 // If it's lower than the lowest supported, give up.
351 if (deployed < SER_FMT_VER_LOWEST_READ)
352 deployed = SER_FMT_VER_INVALID;
354 if (deployed == SER_FMT_VER_INVALID) {
355 actionstream << "Server: A mismatched client tried to connect from "
356 << addr_s << std::endl;
357 infostream<<"Server: Cannot negotiate serialization version with "
358 << addr_s << std::endl;
359 DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
360 L"Your client's version is not supported.\n"
361 L"Server version is ")
362 + utf8_to_wide(g_version_string) + L"."
367 client->setPendingSerializationVersion(deployed);
370 Read and check network protocol version
373 u16 min_net_proto_version = 0;
374 if (pkt->getSize() >= 1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2)
375 min_net_proto_version = pkt->getU16(1 + PLAYERNAME_SIZE + PASSWORD_SIZE);
377 // Use same version as minimum and maximum if maximum version field
378 // doesn't exist (backwards compatibility)
379 u16 max_net_proto_version = min_net_proto_version;
380 if (pkt->getSize() >= 1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2 + 2)
381 max_net_proto_version = pkt->getU16(1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2);
383 // Start with client's maximum version
384 u16 net_proto_version = max_net_proto_version;
386 // Figure out a working version if it is possible at all
387 if (max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
388 min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX) {
389 // If maximum is larger than our maximum, go with our maximum
390 if (max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
391 net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
392 // Else go with client's maximum
394 net_proto_version = max_net_proto_version;
397 // The client will send up to date init packet, ignore this one
398 if (net_proto_version >= 25)
401 verbosestream << "Server: " << addr_s << ": Protocol version: min: "
402 << min_net_proto_version << ", max: " << max_net_proto_version
403 << ", chosen: " << net_proto_version << std::endl;
405 client->net_proto_version = net_proto_version;
407 if (net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
408 net_proto_version > SERVER_PROTOCOL_VERSION_MAX) {
409 actionstream << "Server: A mismatched client tried to connect from "
410 << addr_s << std::endl;
411 DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
412 L"Your client's version is not supported.\n"
413 L"Server version is ")
414 + utf8_to_wide(g_version_string) + L",\n"
415 + L"server's PROTOCOL_VERSION is "
416 + utf8_to_wide(itos(SERVER_PROTOCOL_VERSION_MIN))
418 + utf8_to_wide(itos(SERVER_PROTOCOL_VERSION_MAX))
419 + L", client's PROTOCOL_VERSION is "
420 + utf8_to_wide(itos(min_net_proto_version))
422 + utf8_to_wide(itos(max_net_proto_version))
427 if (g_settings->getBool("strict_protocol_version_checking")) {
428 if (net_proto_version != LATEST_PROTOCOL_VERSION) {
429 actionstream << "Server: A mismatched (strict) client tried to "
430 << "connect from " << addr_s << std::endl;
431 DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
432 L"Your client's version is not supported.\n"
433 L"Server version is ")
434 + utf8_to_wide(g_version_string) + L",\n"
435 + L"server's PROTOCOL_VERSION (strict) is "
436 + utf8_to_wide(itos(LATEST_PROTOCOL_VERSION))
437 + L", client's PROTOCOL_VERSION is "
438 + utf8_to_wide(itos(min_net_proto_version))
440 + utf8_to_wide(itos(max_net_proto_version))
449 char playername[PLAYERNAME_SIZE];
450 unsigned int playername_length = 0;
451 for (; playername_length < PLAYERNAME_SIZE; playername_length++ ) {
452 playername[playername_length] = pkt->getChar(1+playername_length);
453 if (pkt->getChar(1+playername_length) == 0)
457 if (playername_length == PLAYERNAME_SIZE) {
458 actionstream << "Server: Player with name exceeding max length "
459 << "tried to connect from " << addr_s << std::endl;
460 DenyAccess_Legacy(pkt->getPeerId(), L"Name too long");
465 if (playername[0]=='\0') {
466 actionstream << "Server: Player with an empty name "
467 << "tried to connect from " << addr_s << std::endl;
468 DenyAccess_Legacy(pkt->getPeerId(), L"Empty name");
472 if (string_allowed(playername, PLAYERNAME_ALLOWED_CHARS) == false) {
473 actionstream << "Server: Player with an invalid name "
474 << "tried to connect from " << addr_s << std::endl;
475 DenyAccess_Legacy(pkt->getPeerId(), L"Name contains unallowed characters");
479 if (!isSingleplayer() && strcasecmp(playername, "singleplayer") == 0) {
480 actionstream << "Server: Player with the name \"singleplayer\" "
481 << "tried to connect from " << addr_s << std::endl;
482 DenyAccess_Legacy(pkt->getPeerId(), L"Name is not allowed");
488 if (m_script->on_prejoinplayer(playername, addr_s, &reason)) {
489 actionstream << "Server: Player with the name \"" << playername << "\" "
490 << "tried to connect from " << addr_s << " "
491 << "but it was disallowed for the following reason: "
492 << reason << std::endl;
493 DenyAccess_Legacy(pkt->getPeerId(), utf8_to_wide(reason.c_str()));
498 infostream<<"Server: New connection: \""<<playername<<"\" from "
499 <<addr_s<<" (peer_id="<<pkt->getPeerId()<<")"<<std::endl;
502 char given_password[PASSWORD_SIZE];
503 if (pkt->getSize() < 1 + PLAYERNAME_SIZE + PASSWORD_SIZE) {
504 // old version - assume blank password
505 given_password[0] = 0;
508 for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
509 given_password[i] = pkt->getChar(21 + i);
511 given_password[PASSWORD_SIZE - 1] = 0;
514 if (!base64_is_valid(given_password)) {
515 actionstream << "Server: " << playername
516 << " supplied invalid password hash" << std::endl;
517 DenyAccess_Legacy(pkt->getPeerId(), L"Invalid password hash");
521 // Enforce user limit.
522 // Don't enforce for users that have some admin right
523 if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") &&
524 !checkPriv(playername, "server") &&
525 !checkPriv(playername, "ban") &&
526 !checkPriv(playername, "privs") &&
527 !checkPriv(playername, "password") &&
528 playername != g_settings->get("name")) {
529 actionstream << "Server: " << playername << " tried to join, but there"
530 << " are already max_users="
531 << g_settings->getU16("max_users") << " players." << std::endl;
532 DenyAccess_Legacy(pkt->getPeerId(), L"Too many users.");
536 std::string checkpwd; // Password hash to check against
537 bool has_auth = m_script->getAuth(playername, &checkpwd, NULL);
539 // If no authentication info exists for user, create it
541 if (!isSingleplayer() &&
542 g_settings->getBool("disallow_empty_password") &&
543 std::string(given_password) == "") {
544 actionstream << "Server: " << playername
545 << " supplied empty password" << std::endl;
546 DenyAccess_Legacy(pkt->getPeerId(), L"Empty passwords are "
547 L"disallowed. Set a password and try again.");
550 std::string raw_default_password =
551 g_settings->get("default_password");
552 std::string initial_password =
553 translate_password(playername, raw_default_password);
555 // If default_password is empty, allow any initial password
556 if (raw_default_password.length() == 0)
557 initial_password = given_password;
559 m_script->createAuth(playername, initial_password);
562 has_auth = m_script->getAuth(playername, &checkpwd, NULL);
565 actionstream << "Server: " << playername << " cannot be authenticated"
566 << " (auth handler does not work?)" << std::endl;
567 DenyAccess_Legacy(pkt->getPeerId(), L"Not allowed to login");
571 if (given_password != checkpwd) {
572 actionstream << "Server: User " << playername
574 << " supplied wrong password (auth mechanism: legacy)."
576 DenyAccess_Legacy(pkt->getPeerId(), L"Wrong password");
580 RemotePlayer *player =
581 static_cast<RemotePlayer*>(m_env->getPlayer(playername));
583 if (player && player->peer_id != 0) {
584 actionstream << "Server: " << playername << ": Failed to emerge player"
585 << " (player allocated to an another client)" << std::endl;
586 DenyAccess_Legacy(pkt->getPeerId(), L"Another client is connected with this "
587 L"name. If your client closed unexpectedly, try again in "
591 m_clients.setPlayerName(pkt->getPeerId(), playername);
594 Answer with a TOCLIENT_INIT
597 NetworkPacket resp_pkt(TOCLIENT_INIT_LEGACY, 1 + 6 + 8 + 4,
600 resp_pkt << (u8) deployed << (v3s16) floatToInt(v3f(0,0,0), BS)
601 << (u64) m_env->getServerMap().getSeed()
602 << g_settings->getFloat("dedicated_server_step");
605 m_clients.event(pkt->getPeerId(), CSE_InitLegacy);
608 void Server::handleCommand_Init2(NetworkPacket* pkt)
610 verbosestream << "Server: Got TOSERVER_INIT2 from "
611 << pkt->getPeerId() << std::endl;
613 m_clients.event(pkt->getPeerId(), CSE_GotInit2);
614 u16 protocol_version = m_clients.getProtocolVersion(pkt->getPeerId());
618 Send some initialization data
621 infostream << "Server: Sending content to "
622 << getPlayerName(pkt->getPeerId()) << std::endl;
624 // Send player movement settings
625 SendMovement(pkt->getPeerId());
627 // Send item definitions
628 SendItemDef(pkt->getPeerId(), m_itemdef, protocol_version);
630 // Send node definitions
631 SendNodeDef(pkt->getPeerId(), m_nodedef, protocol_version);
633 m_clients.event(pkt->getPeerId(), CSE_SetDefinitionsSent);
635 // Send media announcement
636 sendMediaAnnouncement(pkt->getPeerId());
638 // Send detached inventories
639 sendDetachedInventories(pkt->getPeerId());
642 u16 time = m_env->getTimeOfDay();
643 float time_speed = g_settings->getFloat("time_speed");
644 SendTimeOfDay(pkt->getPeerId(), time, time_speed);
646 SendCSMFlavourLimits(pkt->getPeerId());
648 // Warnings about protocol version can be issued here
649 if (getClient(pkt->getPeerId())->net_proto_version < LATEST_PROTOCOL_VERSION) {
650 SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
651 L"# Server: WARNING: YOUR CLIENT'S VERSION MAY NOT BE FULLY COMPATIBLE "
652 L"WITH THIS SERVER!"));
657 void Server::handleCommand_RequestMedia(NetworkPacket* pkt)
659 std::vector<std::string> tosend;
664 infostream << "Sending " << numfiles << " files to "
665 << getPlayerName(pkt->getPeerId()) << std::endl;
666 verbosestream << "TOSERVER_REQUEST_MEDIA: " << std::endl;
668 for (u16 i = 0; i < numfiles; i++) {
673 tosend.push_back(name);
674 verbosestream << "TOSERVER_REQUEST_MEDIA: requested file "
675 << name << std::endl;
678 sendRequestedMedia(pkt->getPeerId(), tosend);
681 void Server::handleCommand_ClientReady(NetworkPacket* pkt)
683 u16 peer_id = pkt->getPeerId();
685 PlayerSAO* playersao = StageTwoClientInit(peer_id);
687 if (playersao == NULL) {
689 << "TOSERVER_CLIENT_READY stage 2 client init failed for peer_id: "
690 << peer_id << std::endl;
691 m_con.DisconnectPeer(peer_id);
696 if (pkt->getSize() < 8) {
698 << "TOSERVER_CLIENT_READY client sent inconsistent data, disconnecting peer_id: "
699 << peer_id << std::endl;
700 m_con.DisconnectPeer(peer_id);
704 u8 major_ver, minor_ver, patch_ver, reserved;
705 std::string full_ver;
706 *pkt >> major_ver >> minor_ver >> patch_ver >> reserved >> full_ver;
708 m_clients.setClientVersion(
709 peer_id, major_ver, minor_ver, patch_ver,
712 const std::vector<std::string> &players = m_clients.getPlayerNames();
713 NetworkPacket list_pkt(TOCLIENT_UPDATE_PLAYER_LIST, 0, peer_id);
714 list_pkt << (u8) PLAYER_LIST_INIT << (u16) players.size();
715 for (const std::string &player: players) {
718 m_clients.send(peer_id, 0, &list_pkt, true);
720 NetworkPacket notice_pkt(TOCLIENT_UPDATE_PLAYER_LIST, 0, PEER_ID_INEXISTENT);
721 // (u16) 1 + std::string represents a pseudo vector serialization representation
722 notice_pkt << (u8) PLAYER_LIST_ADD << (u16) 1 << std::string(playersao->getPlayer()->getName());
723 m_clients.sendToAll(¬ice_pkt);
725 m_clients.event(peer_id, CSE_SetClientReady);
726 m_script->on_joinplayer(playersao);
727 // Send shutdown timer if shutdown has been scheduled
728 if (m_shutdown_timer > 0.0f) {
729 std::wstringstream ws;
730 ws << L"*** Server shutting down in "
731 << duration_to_string(myround(m_shutdown_timer)).c_str() << ".";
732 SendChatMessage(pkt->getPeerId(), ws.str());
736 void Server::handleCommand_GotBlocks(NetworkPacket* pkt)
738 if (pkt->getSize() < 1)
752 RemoteClient *client = getClient(pkt->getPeerId());
754 if ((s16)pkt->getSize() < 1 + (int)count * 6) {
755 throw con::InvalidIncomingDataException
756 ("GOTBLOCKS length is too short");
759 for (u16 i = 0; i < count; i++) {
766 void Server::process_PlayerPos(RemotePlayer *player, PlayerSAO *playersao,
769 if (pkt->getRemainingBytes() < 12 + 12 + 4 + 4)
773 s32 f32pitch, f32yaw;
781 f32 pitch = (f32)f32pitch / 100.0;
782 f32 yaw = (f32)f32yaw / 100.0;
785 // default behavior (in case an old client doesn't send these)
789 if (pkt->getRemainingBytes() >= 4)
791 if (pkt->getRemainingBytes() >= 1) {
793 fov = (f32)f32fov / 80.0;
795 if (pkt->getRemainingBytes() >= 1)
796 *pkt >> wanted_range;
798 v3f position((f32)ps.X / 100.0, (f32)ps.Y / 100.0, (f32)ps.Z / 100.0);
799 v3f speed((f32)ss.X / 100.0, (f32)ss.Y / 100.0, (f32)ss.Z / 100.0);
801 pitch = modulo360f(pitch);
802 yaw = wrapDegrees_0_360(yaw);
804 playersao->setBasePosition(position);
805 player->setSpeed(speed);
806 playersao->setPitch(pitch);
807 playersao->setYaw(yaw);
808 playersao->setFov(fov);
809 playersao->setWantedRange(wanted_range);
810 player->keyPressed = keyPressed;
811 player->control.up = (keyPressed & 1);
812 player->control.down = (keyPressed & 2);
813 player->control.left = (keyPressed & 4);
814 player->control.right = (keyPressed & 8);
815 player->control.jump = (keyPressed & 16);
816 player->control.aux1 = (keyPressed & 32);
817 player->control.sneak = (keyPressed & 64);
818 player->control.LMB = (keyPressed & 128);
819 player->control.RMB = (keyPressed & 256);
821 if (playersao->checkMovementCheat()) {
823 m_script->on_cheat(playersao, "moved_too_fast");
824 SendMovePlayer(pkt->getPeerId());
828 void Server::handleCommand_PlayerPos(NetworkPacket* pkt)
830 RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
831 if (player == NULL) {
832 errorstream << "Server::ProcessData(): Canceling: "
833 "No player for peer_id=" << pkt->getPeerId()
834 << " disconnecting peer!" << std::endl;
835 m_con.DisconnectPeer(pkt->getPeerId());
839 PlayerSAO *playersao = player->getPlayerSAO();
840 if (playersao == NULL) {
841 errorstream << "Server::ProcessData(): Canceling: "
842 "No player object for peer_id=" << pkt->getPeerId()
843 << " disconnecting peer!" << std::endl;
844 m_con.DisconnectPeer(pkt->getPeerId());
848 // If player is dead we don't care of this packet
849 if (playersao->isDead()) {
850 verbosestream << "TOSERVER_PLAYERPOS: " << player->getName()
851 << " is dead. Ignoring packet";
855 process_PlayerPos(player, playersao, pkt);
858 void Server::handleCommand_DeletedBlocks(NetworkPacket* pkt)
860 if (pkt->getSize() < 1)
874 RemoteClient *client = getClient(pkt->getPeerId());
876 if ((s16)pkt->getSize() < 1 + (int)count * 6) {
877 throw con::InvalidIncomingDataException
878 ("DELETEDBLOCKS length is too short");
881 for (u16 i = 0; i < count; i++) {
884 client->SetBlockNotSent(p);
888 void Server::handleCommand_InventoryAction(NetworkPacket* pkt)
890 RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
892 if (player == NULL) {
893 errorstream << "Server::ProcessData(): Canceling: "
894 "No player for peer_id=" << pkt->getPeerId()
895 << " disconnecting peer!" << std::endl;
896 m_con.DisconnectPeer(pkt->getPeerId());
900 PlayerSAO *playersao = player->getPlayerSAO();
901 if (playersao == NULL) {
902 errorstream << "Server::ProcessData(): Canceling: "
903 "No player object for peer_id=" << pkt->getPeerId()
904 << " disconnecting peer!" << std::endl;
905 m_con.DisconnectPeer(pkt->getPeerId());
909 // Strip command and create a stream
910 std::string datastring(pkt->getString(0), pkt->getSize());
911 verbosestream << "TOSERVER_INVENTORY_ACTION: data=" << datastring
913 std::istringstream is(datastring, std::ios_base::binary);
915 InventoryAction *a = InventoryAction::deSerialize(is);
917 infostream << "TOSERVER_INVENTORY_ACTION: "
918 << "InventoryAction::deSerialize() returned NULL"
923 // If something goes wrong, this player is to blame
924 RollbackScopeActor rollback_scope(m_rollback,
925 std::string("player:")+player->getName());
928 Note: Always set inventory not sent, to repair cases
929 where the client made a bad prediction.
933 Handle restrictions and special cases of the move action
935 if (a->getType() == IAction::Move) {
936 IMoveAction *ma = (IMoveAction*)a;
938 ma->from_inv.applyCurrentPlayer(player->getName());
939 ma->to_inv.applyCurrentPlayer(player->getName());
941 setInventoryModified(ma->from_inv, false);
942 setInventoryModified(ma->to_inv, false);
944 bool from_inv_is_current_player =
945 (ma->from_inv.type == InventoryLocation::PLAYER) &&
946 (ma->from_inv.name == player->getName());
948 bool to_inv_is_current_player =
949 (ma->to_inv.type == InventoryLocation::PLAYER) &&
950 (ma->to_inv.name == player->getName());
953 Disable moving items out of craftpreview
955 if (ma->from_list == "craftpreview") {
956 infostream << "Ignoring IMoveAction from "
957 << (ma->from_inv.dump()) << ":" << ma->from_list
958 << " to " << (ma->to_inv.dump()) << ":" << ma->to_list
959 << " because src is " << ma->from_list << std::endl;
965 Disable moving items into craftresult and craftpreview
967 if (ma->to_list == "craftpreview" || ma->to_list == "craftresult") {
968 infostream << "Ignoring IMoveAction from "
969 << (ma->from_inv.dump()) << ":" << ma->from_list
970 << " to " << (ma->to_inv.dump()) << ":" << ma->to_list
971 << " because dst is " << ma->to_list << std::endl;
976 // Disallow moving items in elsewhere than player's inventory
977 // if not allowed to interact
978 if (!checkPriv(player->getName(), "interact") &&
979 (!from_inv_is_current_player ||
980 !to_inv_is_current_player)) {
981 infostream << "Cannot move outside of player's inventory: "
982 << "No interact privilege" << std::endl;
988 Handle restrictions and special cases of the drop action
990 else if (a->getType() == IAction::Drop) {
991 IDropAction *da = (IDropAction*)a;
993 da->from_inv.applyCurrentPlayer(player->getName());
995 setInventoryModified(da->from_inv, false);
998 Disable dropping items out of craftpreview
1000 if (da->from_list == "craftpreview") {
1001 infostream << "Ignoring IDropAction from "
1002 << (da->from_inv.dump()) << ":" << da->from_list
1003 << " because src is " << da->from_list << std::endl;
1008 // Disallow dropping items if not allowed to interact
1009 if (!checkPriv(player->getName(), "interact")) {
1014 // Disallow dropping items if dead
1015 if (playersao->isDead()) {
1016 infostream << "Ignoring IDropAction from "
1017 << (da->from_inv.dump()) << ":" << da->from_list
1018 << " because player is dead." << std::endl;
1024 Handle restrictions and special cases of the craft action
1026 else if (a->getType() == IAction::Craft) {
1027 ICraftAction *ca = (ICraftAction*)a;
1029 ca->craft_inv.applyCurrentPlayer(player->getName());
1031 setInventoryModified(ca->craft_inv, false);
1033 //bool craft_inv_is_current_player =
1034 // (ca->craft_inv.type == InventoryLocation::PLAYER) &&
1035 // (ca->craft_inv.name == player->getName());
1037 // Disallow crafting if not allowed to interact
1038 if (!checkPriv(player->getName(), "interact")) {
1039 infostream << "Cannot craft: "
1040 << "No interact privilege" << std::endl;
1047 a->apply(this, playersao, this);
1051 SendInventory(playersao);
1054 void Server::handleCommand_ChatMessage(NetworkPacket* pkt)
1064 std::wstring message;
1065 for (u16 i = 0; i < len; i++) {
1069 message += (wchar_t)tmp_wchar;
1072 RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
1073 if (player == NULL) {
1074 errorstream << "Server::ProcessData(): Canceling: "
1075 "No player for peer_id=" << pkt->getPeerId()
1076 << " disconnecting peer!" << std::endl;
1077 m_con.DisconnectPeer(pkt->getPeerId());
1081 // Get player name of this client
1082 std::string name = player->getName();
1083 std::wstring wname = narrow_to_wide(name);
1085 std::wstring answer_to_sender = handleChat(name, wname, message, true, player);
1086 if (!answer_to_sender.empty()) {
1087 // Send the answer to sender
1088 SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_NORMAL,
1089 answer_to_sender, wname));
1093 void Server::handleCommand_Damage(NetworkPacket* pkt)
1099 RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
1101 if (player == NULL) {
1102 errorstream << "Server::ProcessData(): Canceling: "
1103 "No player for peer_id=" << pkt->getPeerId()
1104 << " disconnecting peer!" << std::endl;
1105 m_con.DisconnectPeer(pkt->getPeerId());
1109 PlayerSAO *playersao = player->getPlayerSAO();
1110 if (playersao == NULL) {
1111 errorstream << "Server::ProcessData(): Canceling: "
1112 "No player object for peer_id=" << pkt->getPeerId()
1113 << " disconnecting peer!" << std::endl;
1114 m_con.DisconnectPeer(pkt->getPeerId());
1118 if (g_settings->getBool("enable_damage")) {
1119 if (playersao->isDead()) {
1120 verbosestream << "Server::ProcessData(): Info: "
1121 "Ignoring damage as player " << player->getName()
1122 << " is already dead." << std::endl;
1126 actionstream << player->getName() << " damaged by "
1127 << (int)damage << " hp at " << PP(playersao->getBasePosition() / BS)
1130 playersao->setHP(playersao->getHP() - damage);
1131 SendPlayerHPOrDie(playersao);
1135 void Server::handleCommand_Password(NetworkPacket* pkt)
1137 if (pkt->getSize() != PASSWORD_SIZE * 2)
1143 // Deny for clients using the new protocol
1144 RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
1145 if (client->net_proto_version >= 25) {
1146 infostream << "Server::handleCommand_Password(): Denying change: "
1147 << " Client protocol version for peer_id=" << pkt->getPeerId()
1148 << " too new!" << std::endl;
1152 for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
1153 char c = pkt->getChar(i);
1159 for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
1160 char c = pkt->getChar(PASSWORD_SIZE + i);
1166 RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
1167 if (player == NULL) {
1168 errorstream << "Server::ProcessData(): Canceling: "
1169 "No player for peer_id=" << pkt->getPeerId()
1170 << " disconnecting peer!" << std::endl;
1171 m_con.DisconnectPeer(pkt->getPeerId());
1175 if (!base64_is_valid(newpwd)) {
1176 infostream<<"Server: " << player->getName() <<
1177 " supplied invalid password hash" << std::endl;
1178 // Wrong old password supplied!!
1179 SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
1180 L"Invalid new password hash supplied. Password NOT changed."));
1184 infostream << "Server: Client requests a password change from "
1185 << "'" << oldpwd << "' to '" << newpwd << "'" << std::endl;
1187 std::string playername = player->getName();
1189 std::string checkpwd;
1190 m_script->getAuth(playername, &checkpwd, NULL);
1192 if (oldpwd != checkpwd) {
1193 infostream << "Server: invalid old password" << std::endl;
1194 // Wrong old password supplied!!
1195 SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
1196 L"Invalid old password supplied. Password NOT changed."));
1200 bool success = m_script->setPassword(playername, newpwd);
1202 actionstream << player->getName() << " changes password" << std::endl;
1203 SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
1204 L"Password change successful."));
1206 actionstream << player->getName() << " tries to change password but "
1207 << "it fails" << std::endl;
1208 SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
1209 L"Password change failed or unavailable."));
1213 void Server::handleCommand_PlayerItem(NetworkPacket* pkt)
1215 if (pkt->getSize() < 2)
1218 RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
1220 if (player == NULL) {
1221 errorstream << "Server::ProcessData(): Canceling: "
1222 "No player for peer_id=" << pkt->getPeerId()
1223 << " disconnecting peer!" << std::endl;
1224 m_con.DisconnectPeer(pkt->getPeerId());
1228 PlayerSAO *playersao = player->getPlayerSAO();
1229 if (playersao == NULL) {
1230 errorstream << "Server::ProcessData(): Canceling: "
1231 "No player object for peer_id=" << pkt->getPeerId()
1232 << " disconnecting peer!" << std::endl;
1233 m_con.DisconnectPeer(pkt->getPeerId());
1241 playersao->setWieldIndex(item);
1244 void Server::handleCommand_Respawn(NetworkPacket* pkt)
1246 RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
1247 if (player == NULL) {
1248 errorstream << "Server::ProcessData(): Canceling: "
1249 "No player for peer_id=" << pkt->getPeerId()
1250 << " disconnecting peer!" << std::endl;
1251 m_con.DisconnectPeer(pkt->getPeerId());
1255 PlayerSAO *playersao = player->getPlayerSAO();
1258 if (!playersao->isDead())
1261 RespawnPlayer(pkt->getPeerId());
1263 actionstream << player->getName() << " respawns at "
1264 << PP(playersao->getBasePosition() / BS) << std::endl;
1266 // ActiveObject is added to environment in AsyncRunStep after
1267 // the previous addition has been successfully removed
1270 void Server::handleCommand_Interact(NetworkPacket* pkt)
1276 [5] u32 length of the next item (plen)
1277 [9] serialized PointedThing
1278 [9 + plen] player position information
1280 0: start digging (from undersurface) or use
1281 1: stop digging (all parameters ignored)
1282 2: digging completed
1283 3: place block or item (to abovesurface)
1285 5: rightclick air ("activate")
1291 std::istringstream tmp_is(pkt->readLongString(), std::ios::binary);
1292 PointedThing pointed;
1293 pointed.deSerialize(tmp_is);
1295 verbosestream << "TOSERVER_INTERACT: action=" << (int)action << ", item="
1296 << item_i << ", pointed=" << pointed.dump() << std::endl;
1298 RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
1300 if (player == NULL) {
1301 errorstream << "Server::ProcessData(): Canceling: "
1302 "No player for peer_id=" << pkt->getPeerId()
1303 << " disconnecting peer!" << std::endl;
1304 m_con.DisconnectPeer(pkt->getPeerId());
1308 PlayerSAO *playersao = player->getPlayerSAO();
1309 if (playersao == NULL) {
1310 errorstream << "Server::ProcessData(): Canceling: "
1311 "No player object for peer_id=" << pkt->getPeerId()
1312 << " disconnecting peer!" << std::endl;
1313 m_con.DisconnectPeer(pkt->getPeerId());
1317 if (playersao->isDead()) {
1318 actionstream << "Server: NoCheat: " << player->getName()
1319 << " tried to interact while dead; ignoring." << std::endl;
1320 if (pointed.type == POINTEDTHING_NODE) {
1321 // Re-send block to revert change on client-side
1322 RemoteClient *client = getClient(pkt->getPeerId());
1323 v3s16 blockpos = getNodeBlockPos(pointed.node_undersurface);
1324 client->SetBlockNotSent(blockpos);
1327 m_script->on_cheat(playersao, "interacted_while_dead");
1331 process_PlayerPos(player, playersao, pkt);
1333 v3f player_pos = playersao->getLastGoodPosition();
1335 // Update wielded item
1336 playersao->setWieldIndex(item_i);
1338 // Get pointed to node (undefined if not POINTEDTYPE_NODE)
1339 v3s16 p_under = pointed.node_undersurface;
1340 v3s16 p_above = pointed.node_abovesurface;
1342 // Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
1343 ServerActiveObject *pointed_object = NULL;
1344 if (pointed.type == POINTEDTHING_OBJECT) {
1345 pointed_object = m_env->getActiveObject(pointed.object_id);
1346 if (pointed_object == NULL) {
1347 verbosestream << "TOSERVER_INTERACT: "
1348 "pointed object is NULL" << std::endl;
1354 v3f pointed_pos_under = player_pos;
1355 v3f pointed_pos_above = player_pos;
1356 if (pointed.type == POINTEDTHING_NODE) {
1357 pointed_pos_under = intToFloat(p_under, BS);
1358 pointed_pos_above = intToFloat(p_above, BS);
1360 else if (pointed.type == POINTEDTHING_OBJECT) {
1361 pointed_pos_under = pointed_object->getBasePosition();
1362 pointed_pos_above = pointed_pos_under;
1366 Make sure the player is allowed to do it
1368 if (!checkPriv(player->getName(), "interact")) {
1369 actionstream<<player->getName()<<" attempted to interact with "
1370 <<pointed.dump()<<" without 'interact' privilege"
1372 // Re-send block to revert change on client-side
1373 RemoteClient *client = getClient(pkt->getPeerId());
1374 // Digging completed -> under
1376 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
1377 client->SetBlockNotSent(blockpos);
1379 // Placement -> above
1381 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
1382 client->SetBlockNotSent(blockpos);
1388 Check that target is reasonably close
1389 (only when digging or placing things)
1391 static thread_local const bool enable_anticheat =
1392 !g_settings->getBool("disable_anticheat");
1394 if ((action == 0 || action == 2 || action == 3 || action == 4) &&
1395 (enable_anticheat && !isSingleplayer())) {
1396 float d = player_pos.getDistanceFrom(pointed_pos_under);
1397 const ItemDefinition &playeritem_def =
1398 playersao->getWieldedItem().getDefinition(m_itemdef);
1399 float max_d = BS * playeritem_def.range;
1400 InventoryList *hlist = playersao->getInventory()->getList("hand");
1401 const ItemDefinition &hand_def =
1402 hlist ? (hlist->getItem(0).getDefinition(m_itemdef)) : (m_itemdef->get(""));
1403 float max_d_hand = BS * hand_def.range;
1404 if (max_d < 0 && max_d_hand >= 0)
1408 // cube diagonal: sqrt(3) = 1.73
1409 if (d > max_d * 1.73) {
1410 actionstream << "Player " << player->getName()
1411 << " tried to access " << pointed.dump()
1412 << " from too far: "
1413 << "d=" << d <<", max_d=" << max_d
1414 << ". ignoring." << std::endl;
1415 // Re-send block to revert change on client-side
1416 RemoteClient *client = getClient(pkt->getPeerId());
1417 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
1418 client->SetBlockNotSent(blockpos);
1420 m_script->on_cheat(playersao, "interacted_too_far");
1427 If something goes wrong, this player is to blame
1429 RollbackScopeActor rollback_scope(m_rollback,
1430 std::string("player:")+player->getName());
1433 0: start digging or punch object
1436 if (pointed.type == POINTEDTHING_NODE) {
1437 MapNode n(CONTENT_IGNORE);
1440 n = m_env->getMap().getNodeNoEx(p_under, &pos_ok);
1442 infostream << "Server: Not punching: Node not found."
1443 << " Adding block to emerge queue."
1445 m_emerge->enqueueBlockEmerge(pkt->getPeerId(),
1446 getNodeBlockPos(p_above), false);
1449 if (n.getContent() != CONTENT_IGNORE)
1450 m_script->node_on_punch(p_under, n, playersao, pointed);
1453 playersao->noCheatDigStart(p_under);
1455 else if (pointed.type == POINTEDTHING_OBJECT) {
1456 // Skip if object has been removed
1457 if (pointed_object->m_removed)
1460 actionstream<<player->getName()<<" punches object "
1461 <<pointed.object_id<<": "
1462 <<pointed_object->getDescription()<<std::endl;
1464 ItemStack punchitem = playersao->getWieldedItemOrHand();
1465 ToolCapabilities toolcap =
1466 punchitem.getToolCapabilities(m_itemdef);
1467 v3f dir = (pointed_object->getBasePosition() -
1468 (playersao->getBasePosition() + playersao->getEyeOffset())
1470 float time_from_last_punch =
1471 playersao->resetTimeFromLastPunch();
1473 s16 src_original_hp = pointed_object->getHP();
1474 s16 dst_origin_hp = playersao->getHP();
1476 pointed_object->punch(dir, &toolcap, playersao,
1477 time_from_last_punch);
1479 // If the object is a player and its HP changed
1480 if (src_original_hp != pointed_object->getHP() &&
1481 pointed_object->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
1482 SendPlayerHPOrDie((PlayerSAO *)pointed_object);
1485 // If the puncher is a player and its HP changed
1486 if (dst_origin_hp != playersao->getHP())
1487 SendPlayerHPOrDie(playersao);
1495 else if (action == 1) {
1499 2: Digging completed
1501 else if (action == 2) {
1502 // Only digging of nodes
1503 if (pointed.type == POINTEDTHING_NODE) {
1505 MapNode n = m_env->getMap().getNodeNoEx(p_under, &pos_ok);
1507 infostream << "Server: Not finishing digging: Node not found."
1508 << " Adding block to emerge queue."
1510 m_emerge->enqueueBlockEmerge(pkt->getPeerId(),
1511 getNodeBlockPos(p_above), false);
1514 /* Cheat prevention */
1515 bool is_valid_dig = true;
1516 if (enable_anticheat && !isSingleplayer()) {
1517 v3s16 nocheat_p = playersao->getNoCheatDigPos();
1518 float nocheat_t = playersao->getNoCheatDigTime();
1519 playersao->noCheatDigEnd();
1520 // If player didn't start digging this, ignore dig
1521 if (nocheat_p != p_under) {
1522 infostream << "Server: NoCheat: " << player->getName()
1523 << " started digging "
1524 << PP(nocheat_p) << " and completed digging "
1525 << PP(p_under) << "; not digging." << std::endl;
1526 is_valid_dig = false;
1528 m_script->on_cheat(playersao, "finished_unknown_dig");
1530 // Get player's wielded item
1531 ItemStack playeritem = playersao->getWieldedItemOrHand();
1532 ToolCapabilities playeritem_toolcap =
1533 playeritem.getToolCapabilities(m_itemdef);
1534 // Get diggability and expected digging time
1535 DigParams params = getDigParams(m_nodedef->get(n).groups,
1536 &playeritem_toolcap);
1537 // If can't dig, try hand
1538 if (!params.diggable) {
1539 InventoryList *hlist = playersao->getInventory()->getList("hand");
1540 const ItemDefinition &hand =
1541 hlist ? hlist->getItem(0).getDefinition(m_itemdef) : m_itemdef->get("");
1542 const ToolCapabilities *tp = hand.tool_capabilities;
1544 params = getDigParams(m_nodedef->get(n).groups, tp);
1546 // If can't dig, ignore dig
1547 if (!params.diggable) {
1548 infostream << "Server: NoCheat: " << player->getName()
1549 << " completed digging " << PP(p_under)
1550 << ", which is not diggable with tool. not digging."
1552 is_valid_dig = false;
1554 m_script->on_cheat(playersao, "dug_unbreakable");
1556 // Check digging time
1557 // If already invalidated, we don't have to
1558 if (!is_valid_dig) {
1559 // Well not our problem then
1561 // Clean and long dig
1562 else if (params.time > 2.0 && nocheat_t * 1.2 > params.time) {
1563 // All is good, but grab time from pool; don't care if
1564 // it's actually available
1565 playersao->getDigPool().grab(params.time);
1567 // Short or laggy dig
1568 // Try getting the time from pool
1569 else if (playersao->getDigPool().grab(params.time)) {
1574 infostream << "Server: NoCheat: " << player->getName()
1575 << " completed digging " << PP(p_under)
1576 << "too fast; not digging." << std::endl;
1577 is_valid_dig = false;
1579 m_script->on_cheat(playersao, "dug_too_fast");
1583 /* Actually dig node */
1585 if (is_valid_dig && n.getContent() != CONTENT_IGNORE)
1586 m_script->node_on_dig(p_under, n, playersao);
1588 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
1589 RemoteClient *client = getClient(pkt->getPeerId());
1590 // Send unusual result (that is, node not being removed)
1591 if (m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR) {
1592 // Re-send block to revert change on client-side
1593 client->SetBlockNotSent(blockpos);
1596 client->ResendBlockIfOnWire(blockpos);
1602 3: place block or right-click object
1604 else if (action == 3) {
1605 ItemStack item = playersao->getWieldedItem();
1607 // Reset build time counter
1608 if (pointed.type == POINTEDTHING_NODE &&
1609 item.getDefinition(m_itemdef).type == ITEM_NODE)
1610 getClient(pkt->getPeerId())->m_time_from_building = 0.0;
1612 if (pointed.type == POINTEDTHING_OBJECT) {
1613 // Right click object
1615 // Skip if object has been removed
1616 if (pointed_object->m_removed)
1619 actionstream << player->getName() << " right-clicks object "
1620 << pointed.object_id << ": "
1621 << pointed_object->getDescription() << std::endl;
1624 pointed_object->rightClick(playersao);
1626 else if (m_script->item_OnPlace(
1627 item, playersao, pointed)) {
1628 // Placement was handled in lua
1630 // Apply returned ItemStack
1631 if (playersao->setWieldedItem(item)) {
1632 SendInventory(playersao);
1636 // If item has node placement prediction, always send the
1637 // blocks to make sure the client knows what exactly happened
1638 RemoteClient *client = getClient(pkt->getPeerId());
1639 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
1640 v3s16 blockpos2 = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
1641 if (item.getDefinition(m_itemdef).node_placement_prediction != "") {
1642 client->SetBlockNotSent(blockpos);
1643 if (blockpos2 != blockpos) {
1644 client->SetBlockNotSent(blockpos2);
1648 client->ResendBlockIfOnWire(blockpos);
1649 if (blockpos2 != blockpos) {
1650 client->ResendBlockIfOnWire(blockpos2);
1658 else if (action == 4) {
1659 ItemStack item = playersao->getWieldedItem();
1661 actionstream << player->getName() << " uses " << item.name
1662 << ", pointing at " << pointed.dump() << std::endl;
1664 if (m_script->item_OnUse(
1665 item, playersao, pointed)) {
1666 // Apply returned ItemStack
1667 if (playersao->setWieldedItem(item)) {
1668 SendInventory(playersao);
1677 else if (action == 5) {
1678 ItemStack item = playersao->getWieldedItem();
1680 actionstream << player->getName() << " activates "
1681 << item.name << std::endl;
1683 if (m_script->item_OnSecondaryUse(
1685 if( playersao->setWieldedItem(item)) {
1686 SendInventory(playersao);
1693 Catch invalid actions
1696 warningstream << "Server: Invalid action "
1697 << action << std::endl;
1701 void Server::handleCommand_RemovedSounds(NetworkPacket* pkt)
1705 for (u16 k = 0; k < num; k++) {
1710 std::unordered_map<s32, ServerPlayingSound>::iterator i =
1711 m_playing_sounds.find(id);
1712 if (i == m_playing_sounds.end())
1715 ServerPlayingSound &psound = i->second;
1716 psound.clients.erase(pkt->getPeerId());
1717 if (psound.clients.empty())
1718 m_playing_sounds.erase(i++);
1722 void Server::handleCommand_NodeMetaFields(NetworkPacket* pkt)
1725 std::string formname;
1728 *pkt >> p >> formname >> num;
1731 for (u16 k = 0; k < num; k++) {
1732 std::string fieldname;
1734 fields[fieldname] = pkt->readLongString();
1737 RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
1739 if (player == NULL) {
1740 errorstream << "Server::ProcessData(): Canceling: "
1741 "No player for peer_id=" << pkt->getPeerId()
1742 << " disconnecting peer!" << std::endl;
1743 m_con.DisconnectPeer(pkt->getPeerId());
1747 PlayerSAO *playersao = player->getPlayerSAO();
1748 if (playersao == NULL) {
1749 errorstream << "Server::ProcessData(): Canceling: "
1750 "No player object for peer_id=" << pkt->getPeerId()
1751 << " disconnecting peer!" << std::endl;
1752 m_con.DisconnectPeer(pkt->getPeerId());
1756 // If something goes wrong, this player is to blame
1757 RollbackScopeActor rollback_scope(m_rollback,
1758 std::string("player:")+player->getName());
1760 // Check the target node for rollback data; leave others unnoticed
1761 RollbackNode rn_old(&m_env->getMap(), p, this);
1763 m_script->node_on_receive_fields(p, formname, fields, playersao);
1765 // Report rollback data
1766 RollbackNode rn_new(&m_env->getMap(), p, this);
1767 if (rollback() && rn_new != rn_old) {
1768 RollbackAction action;
1769 action.setSetNode(p, rn_old, rn_new);
1770 rollback()->reportAction(action);
1774 void Server::handleCommand_InventoryFields(NetworkPacket* pkt)
1776 std::string formname;
1779 *pkt >> formname >> num;
1782 for (u16 k = 0; k < num; k++) {
1783 std::string fieldname;
1785 fields[fieldname] = pkt->readLongString();
1788 RemotePlayer *player = m_env->getPlayer(pkt->getPeerId());
1790 if (player == NULL) {
1791 errorstream << "Server::ProcessData(): Canceling: "
1792 "No player for peer_id=" << pkt->getPeerId()
1793 << " disconnecting peer!" << std::endl;
1794 m_con.DisconnectPeer(pkt->getPeerId());
1798 PlayerSAO *playersao = player->getPlayerSAO();
1799 if (playersao == NULL) {
1800 errorstream << "Server::ProcessData(): Canceling: "
1801 "No player object for peer_id=" << pkt->getPeerId()
1802 << " disconnecting peer!" << std::endl;
1803 m_con.DisconnectPeer(pkt->getPeerId());
1807 m_script->on_playerReceiveFields(playersao, formname, fields);
1810 void Server::handleCommand_FirstSrp(NetworkPacket* pkt)
1812 RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
1813 ClientState cstate = client->getState();
1815 std::string playername = client->getName();
1818 std::string verification_key;
1820 std::string addr_s = getPeerAddress(pkt->getPeerId()).serializeString();
1823 *pkt >> salt >> verification_key >> is_empty;
1825 verbosestream << "Server: Got TOSERVER_FIRST_SRP from " << addr_s
1826 << ", with is_empty=" << (is_empty == 1) << std::endl;
1828 // Either this packet is sent because the user is new or to change the password
1829 if (cstate == CS_HelloSent) {
1830 if (!client->isMechAllowed(AUTH_MECHANISM_FIRST_SRP)) {
1831 actionstream << "Server: Client from " << addr_s
1832 << " tried to set password without being "
1833 << "authenticated, or the username being new." << std::endl;
1834 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
1838 if (!isSingleplayer() &&
1839 g_settings->getBool("disallow_empty_password") &&
1841 actionstream << "Server: " << playername
1842 << " supplied empty password from " << addr_s << std::endl;
1843 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_EMPTY_PASSWORD);
1847 std::string initial_ver_key;
1849 initial_ver_key = encode_srp_verifier(verification_key, salt);
1850 m_script->createAuth(playername, initial_ver_key);
1852 acceptAuth(pkt->getPeerId(), false);
1854 if (cstate < CS_SudoMode) {
1855 infostream << "Server::ProcessData(): Ignoring TOSERVER_FIRST_SRP from "
1856 << addr_s << ": " << "Client has wrong state " << cstate << "."
1860 m_clients.event(pkt->getPeerId(), CSE_SudoLeave);
1861 std::string pw_db_field = encode_srp_verifier(verification_key, salt);
1862 bool success = m_script->setPassword(playername, pw_db_field);
1864 actionstream << playername << " changes password" << std::endl;
1865 SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
1866 L"Password change successful."));
1868 actionstream << playername << " tries to change password but "
1869 << "it fails" << std::endl;
1870 SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
1871 L"Password change failed or unavailable."));
1876 void Server::handleCommand_SrpBytesA(NetworkPacket* pkt)
1878 RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
1879 ClientState cstate = client->getState();
1881 bool wantSudo = (cstate == CS_Active);
1883 if (!((cstate == CS_HelloSent) || (cstate == CS_Active))) {
1884 actionstream << "Server: got SRP _A packet in wrong state "
1885 << cstate << " from "
1886 << getPeerAddress(pkt->getPeerId()).serializeString()
1887 << ". Ignoring." << std::endl;
1891 if (client->chosen_mech != AUTH_MECHANISM_NONE) {
1892 actionstream << "Server: got SRP _A packet, while auth"
1893 << "is already going on with mech " << client->chosen_mech
1894 << " from " << getPeerAddress(pkt->getPeerId()).serializeString()
1895 << " (wantSudo=" << wantSudo << "). Ignoring." << std::endl;
1897 DenySudoAccess(pkt->getPeerId());
1900 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
1905 std::string bytes_A;
1907 *pkt >> bytes_A >> based_on;
1909 infostream << "Server: TOSERVER_SRP_BYTES_A received with "
1910 << "based_on=" << int(based_on) << " and len_A="
1911 << bytes_A.length() << "." << std::endl;
1913 AuthMechanism chosen = (based_on == 0) ?
1914 AUTH_MECHANISM_LEGACY_PASSWORD : AUTH_MECHANISM_SRP;
1917 if (!client->isSudoMechAllowed(chosen)) {
1918 actionstream << "Server: Player \"" << client->getName()
1919 << "\" at " << getPeerAddress(pkt->getPeerId()).serializeString()
1920 << " tried to change password using unallowed mech "
1921 << chosen << "." << std::endl;
1922 DenySudoAccess(pkt->getPeerId());
1926 if (!client->isMechAllowed(chosen)) {
1927 actionstream << "Server: Client tried to authenticate from "
1928 << getPeerAddress(pkt->getPeerId()).serializeString()
1929 << " using unallowed mech " << chosen << "." << std::endl;
1930 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
1935 client->chosen_mech = chosen;
1938 std::string verifier;
1940 if (based_on == 0) {
1942 generate_srp_verifier_and_salt(client->getName(), client->enc_pwd,
1944 } else if (!decode_srp_verifier_and_salt(client->enc_pwd, &verifier, &salt)) {
1945 // Non-base64 errors should have been catched in the init handler
1946 actionstream << "Server: User " << client->getName()
1947 << " tried to log in, but srp verifier field"
1948 << " was invalid (most likely invalid base64)." << std::endl;
1949 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
1956 client->auth_data = srp_verifier_new(SRP_SHA256, SRP_NG_2048,
1957 client->getName().c_str(),
1958 (const unsigned char *) salt.c_str(), salt.size(),
1959 (const unsigned char *) verifier.c_str(), verifier.size(),
1960 (const unsigned char *) bytes_A.c_str(), bytes_A.size(),
1962 (unsigned char **) &bytes_B, &len_B, NULL, NULL);
1965 actionstream << "Server: User " << client->getName()
1966 << " tried to log in, SRP-6a safety check violated in _A handler."
1969 DenySudoAccess(pkt->getPeerId());
1972 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
1977 NetworkPacket resp_pkt(TOCLIENT_SRP_BYTES_S_B, 0, pkt->getPeerId());
1978 resp_pkt << salt << std::string(bytes_B, len_B);
1982 void Server::handleCommand_SrpBytesM(NetworkPacket* pkt)
1984 RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
1985 ClientState cstate = client->getState();
1987 bool wantSudo = (cstate == CS_Active);
1989 verbosestream << "Server: Recieved TOCLIENT_SRP_BYTES_M." << std::endl;
1991 if (!((cstate == CS_HelloSent) || (cstate == CS_Active))) {
1992 actionstream << "Server: got SRP _M packet in wrong state "
1993 << cstate << " from "
1994 << getPeerAddress(pkt->getPeerId()).serializeString()
1995 << ". Ignoring." << std::endl;
1999 if ((client->chosen_mech != AUTH_MECHANISM_SRP)
2000 && (client->chosen_mech != AUTH_MECHANISM_LEGACY_PASSWORD)) {
2001 actionstream << "Server: got SRP _M packet, while auth"
2002 << "is going on with mech " << client->chosen_mech
2003 << " from " << getPeerAddress(pkt->getPeerId()).serializeString()
2004 << " (wantSudo=" << wantSudo << "). Denying." << std::endl;
2006 DenySudoAccess(pkt->getPeerId());
2009 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
2014 std::string bytes_M;
2017 if (srp_verifier_get_session_key_length((SRPVerifier *) client->auth_data)
2018 != bytes_M.size()) {
2019 actionstream << "Server: User " << client->getName()
2020 << " at " << getPeerAddress(pkt->getPeerId()).serializeString()
2021 << " sent bytes_M with invalid length " << bytes_M.size() << std::endl;
2022 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
2026 unsigned char *bytes_HAMK = 0;
2028 srp_verifier_verify_session((SRPVerifier *) client->auth_data,
2029 (unsigned char *)bytes_M.c_str(), &bytes_HAMK);
2033 actionstream << "Server: User " << client->getName()
2034 << " at " << getPeerAddress(pkt->getPeerId()).serializeString()
2035 << " tried to change their password, but supplied wrong"
2036 << " (SRP) password for authentication." << std::endl;
2037 DenySudoAccess(pkt->getPeerId());
2040 actionstream << "Server: User " << client->getName()
2041 << " at " << getPeerAddress(pkt->getPeerId()).serializeString()
2042 << " supplied wrong password (auth mechanism: SRP)."
2044 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_PASSWORD);
2049 if (client->create_player_on_auth_success) {
2050 std::string playername = client->getName();
2051 m_script->createAuth(playername, client->enc_pwd);
2053 std::string checkpwd; // not used, but needed for passing something
2054 if (!m_script->getAuth(playername, &checkpwd, NULL)) {
2055 actionstream << "Server: " << playername << " cannot be authenticated"
2056 << " (auth handler does not work?)" << std::endl;
2057 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
2060 client->create_player_on_auth_success = false;
2063 acceptAuth(pkt->getPeerId(), wantSudo);