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.
23 #include "content_abm.h"
24 #include "content_sao.h"
28 #include "rollback_interface.h"
29 #include "scripting_game.h"
33 #include "network/networkprotocol.h"
34 #include "network/serveropcodes.h"
35 #include "util/auth.h"
36 #include "util/base64.h"
37 #include "util/pointedthing.h"
38 #include "util/serialize.h"
41 void Server::handleCommand_Deprecated(NetworkPacket* pkt)
43 infostream << "Server: " << toServerCommandTable[pkt->getCommand()].name
44 << " not supported anymore" << std::endl;
47 void Server::handleCommand_Init(NetworkPacket* pkt)
50 if(pkt->getSize() < 1)
53 RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
57 Address address = getPeerAddress(pkt->getPeerId());
58 addr_s = address.serializeString();
60 catch (con::PeerNotFoundException &e) {
62 * no peer for this packet found
63 * most common reason is peer timeout, e.g. peer didn't
64 * respond for some time, your server was overloaded or
67 infostream << "Server::ProcessData(): Canceling: peer "
68 << pkt->getPeerId() << " not found" << std::endl;
72 // If net_proto_version is set, this client has already been handled
73 if (client->getState() > CS_Created) {
74 verbosestream << "Server: Ignoring multiple TOSERVER_INITs from "
75 << addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
79 verbosestream << "Server: Got TOSERVER_INIT from " << addr_s << " (peer_id="
80 << pkt->getPeerId() << ")" << std::endl;
82 // Do not allow multiple players in simple singleplayer mode.
83 // This isn't a perfect way to do it, but will suffice for now
84 if (m_simple_singleplayer_mode && m_clients.getClientIDs().size() > 1) {
85 infostream << "Server: Not allowing another client (" << addr_s
86 << ") to connect in simple singleplayer mode" << std::endl;
87 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SINGLEPLAYER);
91 // First byte after command is maximum supported
92 // serialization version
95 u16 min_net_proto_version = 0;
96 u16 max_net_proto_version;
97 std::string playerName;
99 *pkt >> client_max >> supp_compr_modes >> min_net_proto_version
100 >> max_net_proto_version >> playerName;
102 u8 our_max = SER_FMT_VER_HIGHEST_READ;
103 // Use the highest version supported by both
104 u8 depl_serial_v = std::min(client_max, our_max);
105 // If it's lower than the lowest supported, give up.
106 if (depl_serial_v < SER_FMT_VER_LOWEST_READ)
107 depl_serial_v = SER_FMT_VER_INVALID;
109 if (depl_serial_v == SER_FMT_VER_INVALID) {
110 actionstream << "Server: A mismatched client tried to connect from "
111 << addr_s << std::endl;
112 infostream<<"Server: Cannot negotiate serialization version with "
113 << addr_s << std::endl;
114 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
118 client->setPendingSerializationVersion(depl_serial_v);
121 Read and check network protocol version
124 u16 net_proto_version = 0;
126 // Figure out a working version if it is possible at all
127 if (max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
128 min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX) {
129 // If maximum is larger than our maximum, go with our maximum
130 if (max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
131 net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
132 // Else go with client's maximum
134 net_proto_version = max_net_proto_version;
137 verbosestream << "Server: " << addr_s << ": Protocol version: min: "
138 << min_net_proto_version << ", max: " << max_net_proto_version
139 << ", chosen: " << net_proto_version << std::endl;
141 client->net_proto_version = net_proto_version;
143 // On this handler at least protocol version 25 is required
144 if (net_proto_version < 25 ||
145 net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
146 net_proto_version > SERVER_PROTOCOL_VERSION_MAX) {
147 actionstream << "Server: A mismatched client tried to connect from "
148 << addr_s << std::endl;
149 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
153 if (g_settings->getBool("strict_protocol_version_checking")) {
154 if (net_proto_version != LATEST_PROTOCOL_VERSION) {
155 actionstream << "Server: A mismatched (strict) client tried to "
156 << "connect from " << addr_s << std::endl;
157 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
165 const char* playername = playerName.c_str();
167 size_t pns = playerName.size();
168 if (pns == 0 || pns > PLAYERNAME_SIZE) {
169 actionstream << "Server: Player with "
170 << ((pns > PLAYERNAME_SIZE) ? "a too long" : "an empty")
171 << " name tried to connect from " << addr_s << std::endl;
172 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_NAME);
176 if (string_allowed(playerName, PLAYERNAME_ALLOWED_CHARS) == false) {
177 actionstream << "Server: Player with an invalid name "
178 << "tried to connect from " << addr_s << std::endl;
179 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_CHARS_IN_NAME);
183 m_clients.setPlayerName(pkt->getPeerId(), playername);
184 //TODO (later) case insensitivity
186 std::string legacyPlayerNameCasing = playerName;
188 if (!isSingleplayer() && strcasecmp(playername, "singleplayer") == 0) {
189 actionstream << "Server: Player with the name \"singleplayer\" "
190 << "tried to connect from " << addr_s << std::endl;
191 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_NAME);
197 if (m_script->on_prejoinplayer(playername, addr_s, &reason)) {
198 actionstream << "Server: Player with the name \"" << playerName << "\" "
199 << "tried to connect from " << addr_s << " "
200 << "but it was disallowed for the following reason: "
201 << reason << std::endl;
202 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_CUSTOM_STRING,
208 infostream << "Server: New connection: \"" << playerName << "\" from "
209 << addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
211 // Enforce user limit.
212 // Don't enforce for users that have some admin right
213 if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") &&
214 !checkPriv(playername, "server") &&
215 !checkPriv(playername, "ban") &&
216 !checkPriv(playername, "privs") &&
217 !checkPriv(playername, "password") &&
218 playername != g_settings->get("name")) {
219 actionstream << "Server: " << playername << " tried to join from "
220 << addr_s << ", but there" << " are already max_users="
221 << g_settings->getU16("max_users") << " players." << std::endl;
222 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_TOO_MANY_USERS);
227 Compose auth methods for answer
229 std::string encpwd; // encrypted Password field for the user
230 bool has_auth = m_script->getAuth(playername, &encpwd, NULL);
233 client->chosen_mech = AUTH_MECHANISM_NONE;
236 std::vector<std::string> pwd_components = str_split(encpwd, '#');
237 if (pwd_components.size() == 4) {
238 if (pwd_components[1] == "1") { // 1 means srp
239 auth_mechs |= AUTH_MECHANISM_SRP;
240 client->enc_pwd = encpwd;
242 actionstream << "User " << playername
243 << " tried to log in, but password field"
244 << " was invalid (unknown mechcode)." << std::endl;
245 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
248 } else if (base64_is_valid(encpwd)) {
249 auth_mechs |= AUTH_MECHANISM_LEGACY_PASSWORD;
250 client->enc_pwd = encpwd;
252 actionstream << "User " << playername
253 << " tried to log in, but password field"
254 << " was invalid (invalid base64)." << std::endl;
255 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
259 std::string default_password = g_settings->get("default_password");
260 if (default_password.length() == 0) {
261 auth_mechs |= AUTH_MECHANISM_FIRST_SRP;
263 // Take care of default passwords.
264 client->enc_pwd = getSRPVerifier(playerName, default_password);
265 auth_mechs |= AUTH_MECHANISM_SRP;
266 // Create auth, but only on successful login
267 client->create_player_on_auth_success = true;
272 Answer with a TOCLIENT_HELLO
275 verbosestream << "Sending TOCLIENT_HELLO with auth method field: "
276 << auth_mechs << std::endl;
278 NetworkPacket resp_pkt(TOCLIENT_HELLO, 1 + 4
279 + legacyPlayerNameCasing.size(), pkt->getPeerId());
281 u16 depl_compress_mode = NETPROTO_COMPRESSION_NONE;
282 resp_pkt << depl_serial_v << depl_compress_mode << net_proto_version
283 << auth_mechs << legacyPlayerNameCasing;
287 client->allowed_auth_mechs = auth_mechs;
288 client->setDeployedCompressionMode(depl_compress_mode);
290 m_clients.event(pkt->getPeerId(), CSE_Hello);
293 void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
295 // [0] u8 SER_FMT_VER_HIGHEST_READ
296 // [1] u8[20] player_name
297 // [21] u8[28] password <--- can be sent without this, from old versions
299 if (pkt->getSize() < 1+PLAYERNAME_SIZE)
302 RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
306 Address address = getPeerAddress(pkt->getPeerId());
307 addr_s = address.serializeString();
309 catch (con::PeerNotFoundException &e) {
311 * no peer for this packet found
312 * most common reason is peer timeout, e.g. peer didn't
313 * respond for some time, your server was overloaded or
316 infostream << "Server::ProcessData(): Canceling: peer "
317 << pkt->getPeerId() << " not found" << std::endl;
321 // If net_proto_version is set, this client has already been handled
322 if (client->getState() > CS_Created) {
323 verbosestream << "Server: Ignoring multiple TOSERVER_INITs from "
324 << addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
328 verbosestream << "Server: Got TOSERVER_INIT_LEGACY from " << addr_s << " (peer_id="
329 << pkt->getPeerId() << ")" << std::endl;
331 // Do not allow multiple players in simple singleplayer mode.
332 // This isn't a perfect way to do it, but will suffice for now
333 if (m_simple_singleplayer_mode && m_clients.getClientIDs().size() > 1) {
334 infostream << "Server: Not allowing another client (" << addr_s
335 << ") to connect in simple singleplayer mode" << std::endl;
336 DenyAccess_Legacy(pkt->getPeerId(), L"Running in simple singleplayer mode.");
340 // First byte after command is maximum supported
341 // serialization version
346 u8 our_max = SER_FMT_VER_HIGHEST_READ;
347 // Use the highest version supported by both
348 int deployed = std::min(client_max, our_max);
349 // If it's lower than the lowest supported, give up.
350 if (deployed < SER_FMT_VER_LOWEST_READ)
351 deployed = SER_FMT_VER_INVALID;
353 if (deployed == SER_FMT_VER_INVALID) {
354 actionstream << "Server: A mismatched client tried to connect from "
355 << addr_s << std::endl;
356 infostream<<"Server: Cannot negotiate serialization version with "
357 << addr_s << std::endl;
358 DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
359 L"Your client's version is not supported.\n"
360 L"Server version is ")
361 + utf8_to_wide(g_version_string) + L"."
366 client->setPendingSerializationVersion(deployed);
369 Read and check network protocol version
372 u16 min_net_proto_version = 0;
373 if (pkt->getSize() >= 1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2)
374 min_net_proto_version = pkt->getU16(1 + PLAYERNAME_SIZE + PASSWORD_SIZE);
376 // Use same version as minimum and maximum if maximum version field
377 // doesn't exist (backwards compatibility)
378 u16 max_net_proto_version = min_net_proto_version;
379 if (pkt->getSize() >= 1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2 + 2)
380 max_net_proto_version = pkt->getU16(1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2);
382 // Start with client's maximum version
383 u16 net_proto_version = max_net_proto_version;
385 // Figure out a working version if it is possible at all
386 if (max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
387 min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX) {
388 // If maximum is larger than our maximum, go with our maximum
389 if (max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
390 net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
391 // Else go with client's maximum
393 net_proto_version = max_net_proto_version;
396 // The client will send up to date init packet, ignore this one
397 if (net_proto_version >= 25)
400 verbosestream << "Server: " << addr_s << ": Protocol version: min: "
401 << min_net_proto_version << ", max: " << max_net_proto_version
402 << ", chosen: " << net_proto_version << std::endl;
404 client->net_proto_version = net_proto_version;
406 if (net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
407 net_proto_version > SERVER_PROTOCOL_VERSION_MAX) {
408 actionstream << "Server: A mismatched client tried to connect from "
409 << addr_s << std::endl;
410 DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
411 L"Your client's version is not supported.\n"
412 L"Server version is ")
413 + utf8_to_wide(g_version_string) + L",\n"
414 + L"server's PROTOCOL_VERSION is "
415 + utf8_to_wide(itos(SERVER_PROTOCOL_VERSION_MIN))
417 + utf8_to_wide(itos(SERVER_PROTOCOL_VERSION_MAX))
418 + L", client's PROTOCOL_VERSION is "
419 + utf8_to_wide(itos(min_net_proto_version))
421 + utf8_to_wide(itos(max_net_proto_version))
426 if (g_settings->getBool("strict_protocol_version_checking")) {
427 if (net_proto_version != LATEST_PROTOCOL_VERSION) {
428 actionstream << "Server: A mismatched (strict) client tried to "
429 << "connect from " << addr_s << std::endl;
430 DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
431 L"Your client's version is not supported.\n"
432 L"Server version is ")
433 + utf8_to_wide(g_version_string) + L",\n"
434 + L"server's PROTOCOL_VERSION (strict) is "
435 + utf8_to_wide(itos(LATEST_PROTOCOL_VERSION))
436 + L", client's PROTOCOL_VERSION is "
437 + utf8_to_wide(itos(min_net_proto_version))
439 + utf8_to_wide(itos(max_net_proto_version))
448 char playername[PLAYERNAME_SIZE];
449 unsigned int playername_length = 0;
450 for (; playername_length < PLAYERNAME_SIZE; playername_length++ ) {
451 playername[playername_length] = pkt->getChar(1+playername_length);
452 if (pkt->getChar(1+playername_length) == 0)
456 if (playername_length == PLAYERNAME_SIZE) {
457 actionstream << "Server: Player with name exceeding max length "
458 << "tried to connect from " << addr_s << std::endl;
459 DenyAccess_Legacy(pkt->getPeerId(), L"Name too long");
464 if (playername[0]=='\0') {
465 actionstream << "Server: Player with an empty name "
466 << "tried to connect from " << addr_s << std::endl;
467 DenyAccess_Legacy(pkt->getPeerId(), L"Empty name");
471 if (string_allowed(playername, PLAYERNAME_ALLOWED_CHARS) == false) {
472 actionstream << "Server: Player with an invalid name "
473 << "tried to connect from " << addr_s << std::endl;
474 DenyAccess_Legacy(pkt->getPeerId(), L"Name contains unallowed characters");
478 if (!isSingleplayer() && strcasecmp(playername, "singleplayer") == 0) {
479 actionstream << "Server: Player with the name \"singleplayer\" "
480 << "tried to connect from " << addr_s << std::endl;
481 DenyAccess_Legacy(pkt->getPeerId(), L"Name is not allowed");
487 if (m_script->on_prejoinplayer(playername, addr_s, &reason)) {
488 actionstream << "Server: Player with the name \"" << playername << "\" "
489 << "tried to connect from " << addr_s << " "
490 << "but it was disallowed for the following reason: "
491 << reason << std::endl;
492 DenyAccess_Legacy(pkt->getPeerId(), utf8_to_wide(reason.c_str()));
497 infostream<<"Server: New connection: \""<<playername<<"\" from "
498 <<addr_s<<" (peer_id="<<pkt->getPeerId()<<")"<<std::endl;
501 char given_password[PASSWORD_SIZE];
502 if (pkt->getSize() < 1 + PLAYERNAME_SIZE + PASSWORD_SIZE) {
503 // old version - assume blank password
504 given_password[0] = 0;
507 for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
508 given_password[i] = pkt->getChar(21 + i);
510 given_password[PASSWORD_SIZE - 1] = 0;
513 if (!base64_is_valid(given_password)) {
514 actionstream << "Server: " << playername
515 << " supplied invalid password hash" << std::endl;
516 DenyAccess_Legacy(pkt->getPeerId(), L"Invalid password hash");
520 // Enforce user limit.
521 // Don't enforce for users that have some admin right
522 if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") &&
523 !checkPriv(playername, "server") &&
524 !checkPriv(playername, "ban") &&
525 !checkPriv(playername, "privs") &&
526 !checkPriv(playername, "password") &&
527 playername != g_settings->get("name")) {
528 actionstream << "Server: " << playername << " tried to join, but there"
529 << " are already max_users="
530 << g_settings->getU16("max_users") << " players." << std::endl;
531 DenyAccess_Legacy(pkt->getPeerId(), L"Too many users.");
535 std::string checkpwd; // Password hash to check against
536 bool has_auth = m_script->getAuth(playername, &checkpwd, NULL);
538 // If no authentication info exists for user, create it
540 if (!isSingleplayer() &&
541 g_settings->getBool("disallow_empty_password") &&
542 std::string(given_password) == "") {
543 actionstream << "Server: " << playername
544 << " supplied empty password" << std::endl;
545 DenyAccess_Legacy(pkt->getPeerId(), L"Empty passwords are "
546 L"disallowed. Set a password and try again.");
549 std::string raw_default_password =
550 g_settings->get("default_password");
551 std::string initial_password =
552 translatePassword(playername, raw_default_password);
554 // If default_password is empty, allow any initial password
555 if (raw_default_password.length() == 0)
556 initial_password = given_password;
558 m_script->createAuth(playername, initial_password);
561 has_auth = m_script->getAuth(playername, &checkpwd, NULL);
564 actionstream << "Server: " << playername << " cannot be authenticated"
565 << " (auth handler does not work?)" << std::endl;
566 DenyAccess_Legacy(pkt->getPeerId(), L"Not allowed to login");
570 if (given_password != checkpwd) {
571 actionstream << "Server: User " << playername
573 << " supplied wrong password (auth mechanism: legacy)."
575 DenyAccess_Legacy(pkt->getPeerId(), L"Wrong password");
579 RemotePlayer *player =
580 static_cast<RemotePlayer*>(m_env->getPlayer(playername));
582 if (player && player->peer_id != 0) {
583 actionstream << "Server: " << playername << ": Failed to emerge player"
584 << " (player allocated to an another client)" << std::endl;
585 DenyAccess_Legacy(pkt->getPeerId(), L"Another client is connected with this "
586 L"name. If your client closed unexpectedly, try again in "
590 m_clients.setPlayerName(pkt->getPeerId(), playername);
593 Answer with a TOCLIENT_INIT
596 NetworkPacket resp_pkt(TOCLIENT_INIT_LEGACY, 1 + 6 + 8 + 4,
599 resp_pkt << (u8) deployed << (v3s16) floatToInt(v3f(0,0,0), BS)
600 << (u64) m_env->getServerMap().getSeed()
601 << g_settings->getFloat("dedicated_server_step");
604 m_clients.event(pkt->getPeerId(), CSE_InitLegacy);
607 void Server::handleCommand_Init2(NetworkPacket* pkt)
609 verbosestream << "Server: Got TOSERVER_INIT2 from "
610 << pkt->getPeerId() << std::endl;
612 m_clients.event(pkt->getPeerId(), CSE_GotInit2);
613 u16 protocol_version = m_clients.getProtocolVersion(pkt->getPeerId());
616 ///// begin compatibility code
617 PlayerSAO* playersao = NULL;
618 if (protocol_version <= 22) {
619 playersao = StageTwoClientInit(pkt->getPeerId());
621 if (playersao == NULL) {
623 << "TOSERVER_INIT2 stage 2 client init failed for peer "
624 << pkt->getPeerId() << std::endl;
628 ///// end compatibility code
631 Send some initialization data
634 infostream << "Server: Sending content to "
635 << getPlayerName(pkt->getPeerId()) << std::endl;
637 // Send player movement settings
638 SendMovement(pkt->getPeerId());
640 // Send item definitions
641 SendItemDef(pkt->getPeerId(), m_itemdef, protocol_version);
643 // Send node definitions
644 SendNodeDef(pkt->getPeerId(), m_nodedef, protocol_version);
646 m_clients.event(pkt->getPeerId(), CSE_SetDefinitionsSent);
648 // Send media announcement
649 sendMediaAnnouncement(pkt->getPeerId());
651 // Send detached inventories
652 sendDetachedInventories(pkt->getPeerId());
655 u16 time = m_env->getTimeOfDay();
656 float time_speed = g_settings->getFloat("time_speed");
657 SendTimeOfDay(pkt->getPeerId(), time, time_speed);
659 ///// begin compatibility code
660 if (protocol_version <= 22) {
661 m_clients.event(pkt->getPeerId(), CSE_SetClientReady);
662 m_script->on_joinplayer(playersao);
664 ///// end compatibility code
666 // Warnings about protocol version can be issued here
667 if (getClient(pkt->getPeerId())->net_proto_version < LATEST_PROTOCOL_VERSION) {
668 SendChatMessage(pkt->getPeerId(), L"# Server: WARNING: YOUR CLIENT'S "
669 L"VERSION MAY NOT BE FULLY COMPATIBLE WITH THIS SERVER!");
673 void Server::handleCommand_RequestMedia(NetworkPacket* pkt)
675 std::vector<std::string> tosend;
680 infostream << "Sending " << numfiles << " files to "
681 << getPlayerName(pkt->getPeerId()) << std::endl;
682 verbosestream << "TOSERVER_REQUEST_MEDIA: " << std::endl;
684 for (u16 i = 0; i < numfiles; i++) {
689 tosend.push_back(name);
690 verbosestream << "TOSERVER_REQUEST_MEDIA: requested file "
691 << name << std::endl;
694 sendRequestedMedia(pkt->getPeerId(), tosend);
697 void Server::handleCommand_ReceivedMedia(NetworkPacket* pkt)
701 void Server::handleCommand_ClientReady(NetworkPacket* pkt)
703 u16 peer_id = pkt->getPeerId();
704 u16 peer_proto_ver = getClient(peer_id, CS_InitDone)->net_proto_version;
706 // clients <= protocol version 22 did not send ready message,
707 // they're already initialized
708 if (peer_proto_ver <= 22) {
709 infostream << "Client sent message not expected by a "
710 << "client using protocol version <= 22,"
711 << "disconnecting peer_id: " << peer_id << std::endl;
712 m_con.DisconnectPeer(peer_id);
716 PlayerSAO* playersao = StageTwoClientInit(peer_id);
718 if (playersao == NULL) {
720 << "TOSERVER_CLIENT_READY stage 2 client init failed for peer_id: "
721 << peer_id << std::endl;
722 m_con.DisconnectPeer(peer_id);
727 if (pkt->getSize() < 8) {
729 << "TOSERVER_CLIENT_READY client sent inconsistent data, disconnecting peer_id: "
730 << peer_id << std::endl;
731 m_con.DisconnectPeer(peer_id);
735 u8 major_ver, minor_ver, patch_ver, reserved;
736 std::string full_ver;
737 *pkt >> major_ver >> minor_ver >> patch_ver >> reserved >> full_ver;
739 m_clients.setClientVersion(
740 peer_id, major_ver, minor_ver, patch_ver,
743 m_clients.event(peer_id, CSE_SetClientReady);
744 m_script->on_joinplayer(playersao);
747 void Server::handleCommand_GotBlocks(NetworkPacket* pkt)
749 if (pkt->getSize() < 1)
763 RemoteClient *client = getClient(pkt->getPeerId());
765 for (u16 i = 0; i < count; i++) {
766 if ((s16)pkt->getSize() < 1 + (i + 1) * 6)
767 throw con::InvalidIncomingDataException
768 ("GOTBLOCKS length is too short");
777 void Server::handleCommand_PlayerPos(NetworkPacket* pkt)
779 if (pkt->getSize() < 12 + 12 + 4 + 4)
783 s32 f32pitch, f32yaw;
790 f32 pitch = (f32)f32pitch / 100.0;
791 f32 yaw = (f32)f32yaw / 100.0;
794 if (pkt->getSize() >= 12 + 12 + 4 + 4 + 4)
797 v3f position((f32)ps.X / 100.0, (f32)ps.Y / 100.0, (f32)ps.Z / 100.0);
798 v3f speed((f32)ss.X / 100.0, (f32)ss.Y / 100.0, (f32)ss.Z / 100.0);
800 pitch = modulo360f(pitch);
801 yaw = modulo360f(yaw);
803 Player *player = m_env->getPlayer(pkt->getPeerId());
804 if (player == NULL) {
805 errorstream << "Server::ProcessData(): Canceling: "
806 "No player for peer_id=" << pkt->getPeerId()
807 << " disconnecting peer!" << std::endl;
808 m_con.DisconnectPeer(pkt->getPeerId());
812 // If player is dead we don't care of this packet
813 if (player->isDead()) {
814 verbosestream << "TOSERVER_PLAYERPOS: " << player->getName()
815 << " is dead. Ignoring packet";
819 PlayerSAO *playersao = player->getPlayerSAO();
820 if (playersao == NULL) {
821 errorstream << "Server::ProcessData(): Canceling: "
822 "No player object for peer_id=" << pkt->getPeerId()
823 << " disconnecting peer!" << std::endl;
824 m_con.DisconnectPeer(pkt->getPeerId());
828 player->setPosition(position);
829 player->setSpeed(speed);
830 player->setPitch(pitch);
832 player->keyPressed = keyPressed;
833 player->control.up = (keyPressed & 1);
834 player->control.down = (keyPressed & 2);
835 player->control.left = (keyPressed & 4);
836 player->control.right = (keyPressed & 8);
837 player->control.jump = (keyPressed & 16);
838 player->control.aux1 = (keyPressed & 32);
839 player->control.sneak = (keyPressed & 64);
840 player->control.LMB = (keyPressed & 128);
841 player->control.RMB = (keyPressed & 256);
843 if (playersao->checkMovementCheat()) {
845 m_script->on_cheat(playersao, "moved_too_fast");
846 SendMovePlayer(pkt->getPeerId());
850 void Server::handleCommand_DeletedBlocks(NetworkPacket* pkt)
852 if (pkt->getSize() < 1)
866 RemoteClient *client = getClient(pkt->getPeerId());
868 for (u16 i = 0; i < count; i++) {
869 if ((s16)pkt->getSize() < 1 + (i + 1) * 6)
870 throw con::InvalidIncomingDataException
871 ("DELETEDBLOCKS length is too short");
875 client->SetBlockNotSent(p);
879 void Server::handleCommand_InventoryAction(NetworkPacket* pkt)
881 Player *player = m_env->getPlayer(pkt->getPeerId());
882 if (player == NULL) {
883 errorstream << "Server::ProcessData(): Canceling: "
884 "No player for peer_id=" << pkt->getPeerId()
885 << " disconnecting peer!" << std::endl;
886 m_con.DisconnectPeer(pkt->getPeerId());
890 PlayerSAO *playersao = player->getPlayerSAO();
891 if (playersao == NULL) {
892 errorstream << "Server::ProcessData(): Canceling: "
893 "No player object for peer_id=" << pkt->getPeerId()
894 << " disconnecting peer!" << std::endl;
895 m_con.DisconnectPeer(pkt->getPeerId());
899 // Strip command and create a stream
900 std::string datastring(pkt->getString(0), pkt->getSize());
901 verbosestream << "TOSERVER_INVENTORY_ACTION: data=" << datastring
903 std::istringstream is(datastring, std::ios_base::binary);
905 InventoryAction *a = InventoryAction::deSerialize(is);
907 infostream << "TOSERVER_INVENTORY_ACTION: "
908 << "InventoryAction::deSerialize() returned NULL"
913 // If something goes wrong, this player is to blame
914 RollbackScopeActor rollback_scope(m_rollback,
915 std::string("player:")+player->getName());
918 Note: Always set inventory not sent, to repair cases
919 where the client made a bad prediction.
923 Handle restrictions and special cases of the move action
925 if (a->getType() == IACTION_MOVE) {
926 IMoveAction *ma = (IMoveAction*)a;
928 ma->from_inv.applyCurrentPlayer(player->getName());
929 ma->to_inv.applyCurrentPlayer(player->getName());
931 setInventoryModified(ma->from_inv, false);
932 setInventoryModified(ma->to_inv, false);
934 bool from_inv_is_current_player =
935 (ma->from_inv.type == InventoryLocation::PLAYER) &&
936 (ma->from_inv.name == player->getName());
938 bool to_inv_is_current_player =
939 (ma->to_inv.type == InventoryLocation::PLAYER) &&
940 (ma->to_inv.name == player->getName());
943 Disable moving items out of craftpreview
945 if (ma->from_list == "craftpreview") {
946 infostream << "Ignoring IMoveAction from "
947 << (ma->from_inv.dump()) << ":" << ma->from_list
948 << " to " << (ma->to_inv.dump()) << ":" << ma->to_list
949 << " because src is " << ma->from_list << std::endl;
955 Disable moving items into craftresult and craftpreview
957 if (ma->to_list == "craftpreview" || ma->to_list == "craftresult") {
958 infostream << "Ignoring IMoveAction from "
959 << (ma->from_inv.dump()) << ":" << ma->from_list
960 << " to " << (ma->to_inv.dump()) << ":" << ma->to_list
961 << " because dst is " << ma->to_list << std::endl;
966 // Disallow moving items in elsewhere than player's inventory
967 // if not allowed to interact
968 if (!checkPriv(player->getName(), "interact") &&
969 (!from_inv_is_current_player ||
970 !to_inv_is_current_player)) {
971 infostream << "Cannot move outside of player's inventory: "
972 << "No interact privilege" << std::endl;
978 Handle restrictions and special cases of the drop action
980 else if (a->getType() == IACTION_DROP) {
981 IDropAction *da = (IDropAction*)a;
983 da->from_inv.applyCurrentPlayer(player->getName());
985 setInventoryModified(da->from_inv, false);
988 Disable dropping items out of craftpreview
990 if (da->from_list == "craftpreview") {
991 infostream << "Ignoring IDropAction from "
992 << (da->from_inv.dump()) << ":" << da->from_list
993 << " because src is " << da->from_list << std::endl;
998 // Disallow dropping items if not allowed to interact
999 if (!checkPriv(player->getName(), "interact")) {
1005 Handle restrictions and special cases of the craft action
1007 else if (a->getType() == IACTION_CRAFT) {
1008 ICraftAction *ca = (ICraftAction*)a;
1010 ca->craft_inv.applyCurrentPlayer(player->getName());
1012 setInventoryModified(ca->craft_inv, false);
1014 //bool craft_inv_is_current_player =
1015 // (ca->craft_inv.type == InventoryLocation::PLAYER) &&
1016 // (ca->craft_inv.name == player->getName());
1018 // Disallow crafting if not allowed to interact
1019 if (!checkPriv(player->getName(), "interact")) {
1020 infostream << "Cannot craft: "
1021 << "No interact privilege" << std::endl;
1028 a->apply(this, playersao, this);
1032 SendInventory(playersao);
1035 void Server::handleCommand_ChatMessage(NetworkPacket* pkt)
1045 std::wstring message;
1046 for (u16 i = 0; i < len; i++) {
1050 message += (wchar_t)tmp_wchar;
1053 Player *player = m_env->getPlayer(pkt->getPeerId());
1054 if (player == NULL) {
1055 errorstream << "Server::ProcessData(): Canceling: "
1056 "No player for peer_id=" << pkt->getPeerId()
1057 << " disconnecting peer!" << std::endl;
1058 m_con.DisconnectPeer(pkt->getPeerId());
1062 // Get player name of this client
1063 std::string name = player->getName();
1064 std::wstring wname = narrow_to_wide(name);
1066 std::wstring answer_to_sender = handleChat(name, wname, message,
1067 true, pkt->getPeerId());
1068 if (!answer_to_sender.empty()) {
1069 // Send the answer to sender
1070 SendChatMessage(pkt->getPeerId(), answer_to_sender);
1074 void Server::handleCommand_Damage(NetworkPacket* pkt)
1080 Player *player = m_env->getPlayer(pkt->getPeerId());
1081 if (player == NULL) {
1082 errorstream << "Server::ProcessData(): Canceling: "
1083 "No player for peer_id=" << pkt->getPeerId()
1084 << " disconnecting peer!" << std::endl;
1085 m_con.DisconnectPeer(pkt->getPeerId());
1089 PlayerSAO *playersao = player->getPlayerSAO();
1090 if (playersao == NULL) {
1091 errorstream << "Server::ProcessData(): Canceling: "
1092 "No player object for peer_id=" << pkt->getPeerId()
1093 << " disconnecting peer!" << std::endl;
1094 m_con.DisconnectPeer(pkt->getPeerId());
1098 if (g_settings->getBool("enable_damage")) {
1099 actionstream << player->getName() << " damaged by "
1100 << (int)damage << " hp at " << PP(player->getPosition() / BS)
1103 playersao->setHP(playersao->getHP() - damage);
1104 SendPlayerHPOrDie(playersao);
1108 void Server::handleCommand_Breath(NetworkPacket* pkt)
1114 Player *player = m_env->getPlayer(pkt->getPeerId());
1115 if (player == NULL) {
1116 errorstream << "Server::ProcessData(): Canceling: "
1117 "No player for peer_id=" << pkt->getPeerId()
1118 << " disconnecting peer!" << std::endl;
1119 m_con.DisconnectPeer(pkt->getPeerId());
1124 * If player is dead, we don't need to update the breath
1127 if (player->isDead()) {
1128 verbosestream << "TOSERVER_BREATH: " << player->getName()
1129 << " is dead. Ignoring packet";
1134 PlayerSAO *playersao = player->getPlayerSAO();
1135 if (playersao == NULL) {
1136 errorstream << "Server::ProcessData(): Canceling: "
1137 "No player object for peer_id=" << pkt->getPeerId()
1138 << " disconnecting peer!" << std::endl;
1139 m_con.DisconnectPeer(pkt->getPeerId());
1143 playersao->setBreath(breath);
1144 SendPlayerBreath(pkt->getPeerId());
1147 void Server::handleCommand_Password(NetworkPacket* pkt)
1149 if (pkt->getSize() != PASSWORD_SIZE * 2)
1155 // Deny for clients using the new protocol
1156 RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
1157 if (client->net_proto_version >= 25) {
1158 infostream << "Server::handleCommand_Password(): Denying change: "
1159 << " Client protocol version for peer_id=" << pkt->getPeerId()
1160 << " too new!" << std::endl;
1164 for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
1165 char c = pkt->getChar(i);
1171 for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
1172 char c = pkt->getChar(PASSWORD_SIZE + i);
1178 Player *player = m_env->getPlayer(pkt->getPeerId());
1179 if (player == NULL) {
1180 errorstream << "Server::ProcessData(): Canceling: "
1181 "No player for peer_id=" << pkt->getPeerId()
1182 << " disconnecting peer!" << std::endl;
1183 m_con.DisconnectPeer(pkt->getPeerId());
1187 if (!base64_is_valid(newpwd)) {
1188 infostream<<"Server: " << player->getName() <<
1189 " supplied invalid password hash" << std::endl;
1190 // Wrong old password supplied!!
1191 SendChatMessage(pkt->getPeerId(), L"Invalid new password hash supplied. Password NOT changed.");
1195 infostream << "Server: Client requests a password change from "
1196 << "'" << oldpwd << "' to '" << newpwd << "'" << std::endl;
1198 std::string playername = player->getName();
1200 std::string checkpwd;
1201 m_script->getAuth(playername, &checkpwd, NULL);
1203 if (oldpwd != checkpwd) {
1204 infostream << "Server: invalid old password" << std::endl;
1205 // Wrong old password supplied!!
1206 SendChatMessage(pkt->getPeerId(), L"Invalid old password supplied. Password NOT changed.");
1210 bool success = m_script->setPassword(playername, newpwd);
1212 actionstream << player->getName() << " changes password" << std::endl;
1213 SendChatMessage(pkt->getPeerId(), L"Password change successful.");
1215 actionstream << player->getName() << " tries to change password but "
1216 << "it fails" << std::endl;
1217 SendChatMessage(pkt->getPeerId(), L"Password change failed or unavailable.");
1221 void Server::handleCommand_PlayerItem(NetworkPacket* pkt)
1223 if (pkt->getSize() < 2)
1226 Player *player = m_env->getPlayer(pkt->getPeerId());
1227 if (player == NULL) {
1228 errorstream << "Server::ProcessData(): Canceling: "
1229 "No player for peer_id=" << pkt->getPeerId()
1230 << " disconnecting peer!" << std::endl;
1231 m_con.DisconnectPeer(pkt->getPeerId());
1235 PlayerSAO *playersao = player->getPlayerSAO();
1236 if (playersao == NULL) {
1237 errorstream << "Server::ProcessData(): Canceling: "
1238 "No player object for peer_id=" << pkt->getPeerId()
1239 << " disconnecting peer!" << std::endl;
1240 m_con.DisconnectPeer(pkt->getPeerId());
1248 playersao->setWieldIndex(item);
1251 void Server::handleCommand_Respawn(NetworkPacket* pkt)
1253 Player *player = m_env->getPlayer(pkt->getPeerId());
1254 if (player == NULL) {
1255 errorstream << "Server::ProcessData(): Canceling: "
1256 "No player for peer_id=" << pkt->getPeerId()
1257 << " disconnecting peer!" << std::endl;
1258 m_con.DisconnectPeer(pkt->getPeerId());
1262 if (!player->isDead())
1265 RespawnPlayer(pkt->getPeerId());
1267 actionstream << player->getName() << " respawns at "
1268 << PP(player->getPosition()/BS) << std::endl;
1270 // ActiveObject is added to environment in AsyncRunStep after
1271 // the previous addition has been successfully removed
1274 void Server::handleCommand_Interact(NetworkPacket* pkt)
1276 std::string datastring(pkt->getString(0), pkt->getSize());
1277 std::istringstream is(datastring, std::ios_base::binary);
1283 [5] u32 length of the next item
1284 [9] serialized PointedThing
1286 0: start digging (from undersurface) or use
1287 1: stop digging (all parameters ignored)
1288 2: digging completed
1289 3: place block or item (to abovesurface)
1292 u8 action = readU8(is);
1293 u16 item_i = readU16(is);
1294 std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
1295 PointedThing pointed;
1296 pointed.deSerialize(tmp_is);
1298 verbosestream << "TOSERVER_INTERACT: action=" << (int)action << ", item="
1299 << item_i << ", pointed=" << pointed.dump() << std::endl;
1301 Player *player = m_env->getPlayer(pkt->getPeerId());
1302 if (player == NULL) {
1303 errorstream << "Server::ProcessData(): Canceling: "
1304 "No player for peer_id=" << pkt->getPeerId()
1305 << " disconnecting peer!" << std::endl;
1306 m_con.DisconnectPeer(pkt->getPeerId());
1310 PlayerSAO *playersao = player->getPlayerSAO();
1311 if (playersao == NULL) {
1312 errorstream << "Server::ProcessData(): Canceling: "
1313 "No player object for peer_id=" << pkt->getPeerId()
1314 << " disconnecting peer!" << std::endl;
1315 m_con.DisconnectPeer(pkt->getPeerId());
1319 if (player->isDead()) {
1320 verbosestream << "TOSERVER_INTERACT: " << player->getName()
1321 << " is dead. Ignoring packet";
1325 v3f player_pos = playersao->getLastGoodPosition();
1327 // Update wielded item
1328 playersao->setWieldIndex(item_i);
1330 // Get pointed to node (undefined if not POINTEDTYPE_NODE)
1331 v3s16 p_under = pointed.node_undersurface;
1332 v3s16 p_above = pointed.node_abovesurface;
1334 // Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
1335 ServerActiveObject *pointed_object = NULL;
1336 if (pointed.type == POINTEDTHING_OBJECT) {
1337 pointed_object = m_env->getActiveObject(pointed.object_id);
1338 if (pointed_object == NULL) {
1339 verbosestream << "TOSERVER_INTERACT: "
1340 "pointed object is NULL" << std::endl;
1346 v3f pointed_pos_under = player_pos;
1347 v3f pointed_pos_above = player_pos;
1348 if (pointed.type == POINTEDTHING_NODE) {
1349 pointed_pos_under = intToFloat(p_under, BS);
1350 pointed_pos_above = intToFloat(p_above, BS);
1352 else if (pointed.type == POINTEDTHING_OBJECT) {
1353 pointed_pos_under = pointed_object->getBasePosition();
1354 pointed_pos_above = pointed_pos_under;
1358 Check that target is reasonably close
1359 (only when digging or placing things)
1361 static const bool enable_anticheat = !g_settings->getBool("disable_anticheat");
1362 if ((action == 0 || action == 2 || action == 3) &&
1363 (enable_anticheat && !isSingleplayer())) {
1364 float d = player_pos.getDistanceFrom(pointed_pos_under);
1365 float max_d = BS * 14; // Just some large enough value
1367 actionstream << "Player " << player->getName()
1368 << " tried to access " << pointed.dump()
1369 << " from too far: "
1370 << "d=" << d <<", max_d=" << max_d
1371 << ". ignoring." << std::endl;
1372 // Re-send block to revert change on client-side
1373 RemoteClient *client = getClient(pkt->getPeerId());
1374 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
1375 client->SetBlockNotSent(blockpos);
1377 m_script->on_cheat(playersao, "interacted_too_far");
1384 Make sure the player is allowed to do it
1386 if (!checkPriv(player->getName(), "interact")) {
1387 actionstream<<player->getName()<<" attempted to interact with "
1388 <<pointed.dump()<<" without 'interact' privilege"
1390 // Re-send block to revert change on client-side
1391 RemoteClient *client = getClient(pkt->getPeerId());
1392 // Digging completed -> under
1394 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
1395 client->SetBlockNotSent(blockpos);
1397 // Placement -> above
1399 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
1400 client->SetBlockNotSent(blockpos);
1406 If something goes wrong, this player is to blame
1408 RollbackScopeActor rollback_scope(m_rollback,
1409 std::string("player:")+player->getName());
1412 0: start digging or punch object
1415 if (pointed.type == POINTEDTHING_NODE) {
1417 NOTE: This can be used in the future to check if
1418 somebody is cheating, by checking the timing.
1421 MapNode n(CONTENT_IGNORE);
1424 n = m_env->getMap().getNodeNoEx(p_under, &pos_ok);
1426 infostream << "Server: Not punching: Node not found."
1427 << " Adding block to emerge queue."
1429 m_emerge->enqueueBlockEmerge(pkt->getPeerId(),
1430 getNodeBlockPos(p_above), false);
1433 if (n.getContent() != CONTENT_IGNORE)
1434 m_script->node_on_punch(p_under, n, playersao, pointed);
1437 playersao->noCheatDigStart(p_under);
1439 else if (pointed.type == POINTEDTHING_OBJECT) {
1440 // Skip if object has been removed
1441 if (pointed_object->m_removed)
1444 actionstream<<player->getName()<<" punches object "
1445 <<pointed.object_id<<": "
1446 <<pointed_object->getDescription()<<std::endl;
1448 ItemStack punchitem = playersao->getWieldedItem();
1449 ToolCapabilities toolcap =
1450 punchitem.getToolCapabilities(m_itemdef);
1451 v3f dir = (pointed_object->getBasePosition() -
1452 (player->getPosition() + player->getEyeOffset())
1454 float time_from_last_punch =
1455 playersao->resetTimeFromLastPunch();
1457 s16 src_original_hp = pointed_object->getHP();
1458 s16 dst_origin_hp = playersao->getHP();
1460 pointed_object->punch(dir, &toolcap, playersao,
1461 time_from_last_punch);
1463 // If the object is a player and its HP changed
1464 if (src_original_hp != pointed_object->getHP() &&
1465 pointed_object->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
1466 SendPlayerHPOrDie((PlayerSAO *)pointed_object);
1469 // If the puncher is a player and its HP changed
1470 if (dst_origin_hp != playersao->getHP())
1471 SendPlayerHPOrDie(playersao);
1479 else if (action == 1) {
1483 2: Digging completed
1485 else if (action == 2) {
1486 // Only digging of nodes
1487 if (pointed.type == POINTEDTHING_NODE) {
1489 MapNode n = m_env->getMap().getNodeNoEx(p_under, &pos_ok);
1491 infostream << "Server: Not finishing digging: Node not found."
1492 << " Adding block to emerge queue."
1494 m_emerge->enqueueBlockEmerge(pkt->getPeerId(),
1495 getNodeBlockPos(p_above), false);
1498 /* Cheat prevention */
1499 bool is_valid_dig = true;
1500 if (enable_anticheat && !isSingleplayer()) {
1501 v3s16 nocheat_p = playersao->getNoCheatDigPos();
1502 float nocheat_t = playersao->getNoCheatDigTime();
1503 playersao->noCheatDigEnd();
1504 // If player didn't start digging this, ignore dig
1505 if (nocheat_p != p_under) {
1506 infostream << "Server: NoCheat: " << player->getName()
1507 << " started digging "
1508 << PP(nocheat_p) << " and completed digging "
1509 << PP(p_under) << "; not digging." << std::endl;
1510 is_valid_dig = false;
1512 m_script->on_cheat(playersao, "finished_unknown_dig");
1514 // Get player's wielded item
1515 ItemStack playeritem;
1516 InventoryList *mlist = playersao->getInventory()->getList("main");
1518 playeritem = mlist->getItem(playersao->getWieldIndex());
1519 ToolCapabilities playeritem_toolcap =
1520 playeritem.getToolCapabilities(m_itemdef);
1521 // Get diggability and expected digging time
1522 DigParams params = getDigParams(m_nodedef->get(n).groups,
1523 &playeritem_toolcap);
1524 // If can't dig, try hand
1525 if (!params.diggable) {
1526 const ItemDefinition &hand = m_itemdef->get("");
1527 const ToolCapabilities *tp = hand.tool_capabilities;
1529 params = getDigParams(m_nodedef->get(n).groups, tp);
1531 // If can't dig, ignore dig
1532 if (!params.diggable) {
1533 infostream << "Server: NoCheat: " << player->getName()
1534 << " completed digging " << PP(p_under)
1535 << ", which is not diggable with tool. not digging."
1537 is_valid_dig = false;
1539 m_script->on_cheat(playersao, "dug_unbreakable");
1541 // Check digging time
1542 // If already invalidated, we don't have to
1543 if (!is_valid_dig) {
1544 // Well not our problem then
1546 // Clean and long dig
1547 else if (params.time > 2.0 && nocheat_t * 1.2 > params.time) {
1548 // All is good, but grab time from pool; don't care if
1549 // it's actually available
1550 playersao->getDigPool().grab(params.time);
1552 // Short or laggy dig
1553 // Try getting the time from pool
1554 else if (playersao->getDigPool().grab(params.time)) {
1559 infostream << "Server: NoCheat: " << player->getName()
1560 << " completed digging " << PP(p_under)
1561 << "too fast; not digging." << std::endl;
1562 is_valid_dig = false;
1564 m_script->on_cheat(playersao, "dug_too_fast");
1568 /* Actually dig node */
1570 if (is_valid_dig && n.getContent() != CONTENT_IGNORE)
1571 m_script->node_on_dig(p_under, n, playersao);
1573 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
1574 RemoteClient *client = getClient(pkt->getPeerId());
1575 // Send unusual result (that is, node not being removed)
1576 if (m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR) {
1577 // Re-send block to revert change on client-side
1578 client->SetBlockNotSent(blockpos);
1581 client->ResendBlockIfOnWire(blockpos);
1587 3: place block or right-click object
1589 else if (action == 3) {
1590 ItemStack item = playersao->getWieldedItem();
1592 // Reset build time counter
1593 if (pointed.type == POINTEDTHING_NODE &&
1594 item.getDefinition(m_itemdef).type == ITEM_NODE)
1595 getClient(pkt->getPeerId())->m_time_from_building = 0.0;
1597 if (pointed.type == POINTEDTHING_OBJECT) {
1598 // Right click object
1600 // Skip if object has been removed
1601 if (pointed_object->m_removed)
1604 actionstream << player->getName() << " right-clicks object "
1605 << pointed.object_id << ": "
1606 << pointed_object->getDescription() << std::endl;
1609 pointed_object->rightClick(playersao);
1611 else if (m_script->item_OnPlace(
1612 item, playersao, pointed)) {
1613 // Placement was handled in lua
1615 // Apply returned ItemStack
1616 if (playersao->setWieldedItem(item)) {
1617 SendInventory(playersao);
1621 // If item has node placement prediction, always send the
1622 // blocks to make sure the client knows what exactly happened
1623 RemoteClient *client = getClient(pkt->getPeerId());
1624 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
1625 v3s16 blockpos2 = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
1626 if (item.getDefinition(m_itemdef).node_placement_prediction != "") {
1627 client->SetBlockNotSent(blockpos);
1628 if (blockpos2 != blockpos) {
1629 client->SetBlockNotSent(blockpos2);
1633 client->ResendBlockIfOnWire(blockpos);
1634 if (blockpos2 != blockpos) {
1635 client->ResendBlockIfOnWire(blockpos2);
1643 else if (action == 4) {
1644 ItemStack item = playersao->getWieldedItem();
1646 actionstream << player->getName() << " uses " << item.name
1647 << ", pointing at " << pointed.dump() << std::endl;
1649 if (m_script->item_OnUse(
1650 item, playersao, pointed)) {
1651 // Apply returned ItemStack
1652 if (playersao->setWieldedItem(item)) {
1653 SendInventory(playersao);
1662 else if (action == 5) {
1663 ItemStack item = playersao->getWieldedItem();
1665 actionstream << player->getName() << " activates "
1666 << item.name << std::endl;
1668 if (m_script->item_OnSecondaryUse(
1670 if( playersao->setWieldedItem(item)) {
1671 SendInventory(playersao);
1678 Catch invalid actions
1681 warningstream << "Server: Invalid action "
1682 << action << std::endl;
1686 void Server::handleCommand_RemovedSounds(NetworkPacket* pkt)
1690 for (u16 k = 0; k < num; k++) {
1695 std::map<s32, ServerPlayingSound>::iterator i =
1696 m_playing_sounds.find(id);
1698 if (i == m_playing_sounds.end())
1701 ServerPlayingSound &psound = i->second;
1702 psound.clients.erase(pkt->getPeerId());
1703 if (psound.clients.empty())
1704 m_playing_sounds.erase(i++);
1708 void Server::handleCommand_NodeMetaFields(NetworkPacket* pkt)
1711 std::string formname;
1714 *pkt >> p >> formname >> num;
1717 for (u16 k = 0; k < num; k++) {
1718 std::string fieldname;
1720 fields[fieldname] = pkt->readLongString();
1723 Player *player = m_env->getPlayer(pkt->getPeerId());
1724 if (player == NULL) {
1725 errorstream << "Server::ProcessData(): Canceling: "
1726 "No player for peer_id=" << pkt->getPeerId()
1727 << " disconnecting peer!" << std::endl;
1728 m_con.DisconnectPeer(pkt->getPeerId());
1732 PlayerSAO *playersao = player->getPlayerSAO();
1733 if (playersao == NULL) {
1734 errorstream << "Server::ProcessData(): Canceling: "
1735 "No player object for peer_id=" << pkt->getPeerId()
1736 << " disconnecting peer!" << std::endl;
1737 m_con.DisconnectPeer(pkt->getPeerId());
1741 // If something goes wrong, this player is to blame
1742 RollbackScopeActor rollback_scope(m_rollback,
1743 std::string("player:")+player->getName());
1745 // Check the target node for rollback data; leave others unnoticed
1746 RollbackNode rn_old(&m_env->getMap(), p, this);
1748 m_script->node_on_receive_fields(p, formname, fields, playersao);
1750 // Report rollback data
1751 RollbackNode rn_new(&m_env->getMap(), p, this);
1752 if (rollback() && rn_new != rn_old) {
1753 RollbackAction action;
1754 action.setSetNode(p, rn_old, rn_new);
1755 rollback()->reportAction(action);
1759 void Server::handleCommand_InventoryFields(NetworkPacket* pkt)
1761 std::string formname;
1764 *pkt >> formname >> num;
1767 for (u16 k = 0; k < num; k++) {
1768 std::string fieldname;
1770 fields[fieldname] = pkt->readLongString();
1773 Player *player = m_env->getPlayer(pkt->getPeerId());
1774 if (player == NULL) {
1775 errorstream << "Server::ProcessData(): Canceling: "
1776 "No player for peer_id=" << pkt->getPeerId()
1777 << " disconnecting peer!" << std::endl;
1778 m_con.DisconnectPeer(pkt->getPeerId());
1782 PlayerSAO *playersao = player->getPlayerSAO();
1783 if (playersao == NULL) {
1784 errorstream << "Server::ProcessData(): Canceling: "
1785 "No player object for peer_id=" << pkt->getPeerId()
1786 << " disconnecting peer!" << std::endl;
1787 m_con.DisconnectPeer(pkt->getPeerId());
1791 m_script->on_playerReceiveFields(playersao, formname, fields);
1794 void Server::handleCommand_FirstSrp(NetworkPacket* pkt)
1796 RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
1797 ClientState cstate = client->getState();
1799 std::string playername = client->getName();
1802 std::string verification_key;
1804 std::string addr_s = getPeerAddress(pkt->getPeerId()).serializeString();
1807 *pkt >> salt >> verification_key >> is_empty;
1809 verbosestream << "Server: Got TOSERVER_FIRST_SRP from " << addr_s
1810 << ", with is_empty= " << is_empty << std::endl;
1812 // Either this packet is sent because the user is new or to change the password
1813 if (cstate == CS_HelloSent) {
1814 if (!client->isMechAllowed(AUTH_MECHANISM_FIRST_SRP)) {
1815 actionstream << "Server: Client from " << addr_s
1816 << " tried to set password without being "
1817 << "authenticated, or the username being new." << std::endl;
1818 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
1822 if (!isSingleplayer() &&
1823 g_settings->getBool("disallow_empty_password") &&
1825 actionstream << "Server: " << playername
1826 << " supplied empty password from " << addr_s << std::endl;
1827 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_EMPTY_PASSWORD);
1831 std::string initial_ver_key;
1833 initial_ver_key = encodeSRPVerifier(verification_key, salt);
1834 m_script->createAuth(playername, initial_ver_key);
1836 acceptAuth(pkt->getPeerId(), false);
1838 if (cstate < CS_SudoMode) {
1839 infostream << "Server::ProcessData(): Ignoring TOSERVER_FIRST_SRP from "
1840 << addr_s << ": " << "Client has wrong state " << cstate << "."
1844 m_clients.event(pkt->getPeerId(), CSE_SudoLeave);
1845 std::string pw_db_field = encodeSRPVerifier(verification_key, salt);
1846 bool success = m_script->setPassword(playername, pw_db_field);
1848 actionstream << playername << " changes password" << std::endl;
1849 SendChatMessage(pkt->getPeerId(), L"Password change successful.");
1851 actionstream << playername << " tries to change password but "
1852 << "it fails" << std::endl;
1853 SendChatMessage(pkt->getPeerId(), L"Password change failed or unavailable.");
1858 void Server::handleCommand_SrpBytesA(NetworkPacket* pkt)
1860 RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
1861 ClientState cstate = client->getState();
1863 bool wantSudo = (cstate == CS_Active);
1865 if (!((cstate == CS_HelloSent) || (cstate == CS_Active))) {
1866 actionstream << "Server: got SRP _A packet in wrong state "
1867 << cstate << " from "
1868 << getPeerAddress(pkt->getPeerId()).serializeString()
1869 << ". Ignoring." << std::endl;
1873 if (client->chosen_mech != AUTH_MECHANISM_NONE) {
1874 actionstream << "Server: got SRP _A packet, while auth"
1875 << "is already going on with mech " << client->chosen_mech
1876 << " from " << getPeerAddress(pkt->getPeerId()).serializeString()
1877 << " (wantSudo=" << wantSudo << "). Ignoring." << std::endl;
1879 DenySudoAccess(pkt->getPeerId());
1882 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
1887 std::string bytes_A;
1889 *pkt >> bytes_A >> based_on;
1891 infostream << "Server: TOSERVER_SRP_BYTES_A received with "
1892 << "based_on=" << int(based_on) << " and len_A="
1893 << bytes_A.length() << "." << std::endl;
1895 AuthMechanism chosen = (based_on == 0) ?
1896 AUTH_MECHANISM_LEGACY_PASSWORD : AUTH_MECHANISM_SRP;
1899 if (!client->isSudoMechAllowed(chosen)) {
1900 actionstream << "Server: Player \"" << client->getName()
1901 << "\" at " << getPeerAddress(pkt->getPeerId()).serializeString()
1902 << " tried to change password using unallowed mech "
1903 << chosen << "." << std::endl;
1904 DenySudoAccess(pkt->getPeerId());
1908 if (!client->isMechAllowed(chosen)) {
1909 actionstream << "Server: Client tried to authenticate from "
1910 << getPeerAddress(pkt->getPeerId()).serializeString()
1911 << " using unallowed mech " << chosen << "." << std::endl;
1912 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
1917 client->chosen_mech = chosen;
1919 std::string bytes_s;
1920 std::string bytes_v;
1922 if (based_on == 0) {
1923 char *p_bytes_s = 0;
1925 char *p_bytes_v = 0;
1927 getSRPVerifier(client->getName(), client->enc_pwd,
1929 &p_bytes_v, &len_v);
1930 bytes_s = std::string(p_bytes_s, len_s);
1931 bytes_v = std::string(p_bytes_v, len_v);
1934 } else if (!decodeSRPVerifier(client->enc_pwd, &bytes_s, &bytes_v)) {
1935 // Non-base64 errors should have been catched in the init handler
1936 actionstream << "Server: User " << client->getName()
1937 << " tried to log in, but srp verifier field"
1938 << " was invalid (most likely invalid base64)." << std::endl;
1939 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
1946 client->auth_data = srp_verifier_new(SRP_SHA256, SRP_NG_2048,
1947 client->getName().c_str(),
1948 (const unsigned char *) bytes_s.c_str(), bytes_s.size(),
1949 (const unsigned char *) bytes_v.c_str(), bytes_v.size(),
1950 (const unsigned char *) bytes_A.c_str(), bytes_A.size(),
1952 (unsigned char **) &bytes_B, &len_B, NULL, NULL);
1955 actionstream << "Server: User " << client->getName()
1956 << " tried to log in, SRP-6a safety check violated in _A handler."
1959 DenySudoAccess(pkt->getPeerId());
1962 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
1967 NetworkPacket resp_pkt(TOCLIENT_SRP_BYTES_S_B, 0, pkt->getPeerId());
1968 resp_pkt << bytes_s << std::string(bytes_B, len_B);
1972 void Server::handleCommand_SrpBytesM(NetworkPacket* pkt)
1974 RemoteClient* client = getClient(pkt->getPeerId(), CS_Invalid);
1975 ClientState cstate = client->getState();
1977 bool wantSudo = (cstate == CS_Active);
1979 verbosestream << "Server: Recieved TOCLIENT_SRP_BYTES_M." << std::endl;
1981 if (!((cstate == CS_HelloSent) || (cstate == CS_Active))) {
1982 actionstream << "Server: got SRP _M packet in wrong state "
1983 << cstate << " from "
1984 << getPeerAddress(pkt->getPeerId()).serializeString()
1985 << ". Ignoring." << std::endl;
1989 if ((client->chosen_mech != AUTH_MECHANISM_SRP)
1990 && (client->chosen_mech != AUTH_MECHANISM_LEGACY_PASSWORD)) {
1991 actionstream << "Server: got SRP _M packet, while auth"
1992 << "is going on with mech " << client->chosen_mech
1993 << " from " << getPeerAddress(pkt->getPeerId()).serializeString()
1994 << " (wantSudo=" << wantSudo << "). Denying." << std::endl;
1996 DenySudoAccess(pkt->getPeerId());
1999 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
2004 std::string bytes_M;
2007 if (srp_verifier_get_session_key_length((SRPVerifier *) client->auth_data)
2008 != bytes_M.size()) {
2009 actionstream << "Server: User " << client->getName()
2010 << " at " << getPeerAddress(pkt->getPeerId()).serializeString()
2011 << " sent bytes_M with invalid length " << bytes_M.size() << std::endl;
2012 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_UNEXPECTED_DATA);
2016 unsigned char *bytes_HAMK = 0;
2018 srp_verifier_verify_session((SRPVerifier *) client->auth_data,
2019 (unsigned char *)bytes_M.c_str(), &bytes_HAMK);
2023 actionstream << "Server: User " << client->getName()
2024 << " at " << getPeerAddress(pkt->getPeerId()).serializeString()
2025 << " tried to change their password, but supplied wrong"
2026 << " (SRP) password for authentication." << std::endl;
2027 DenySudoAccess(pkt->getPeerId());
2030 actionstream << "Server: User " << client->getName()
2031 << " at " << getPeerAddress(pkt->getPeerId()).serializeString()
2032 << " supplied wrong password (auth mechanism: SRP)."
2034 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_PASSWORD);
2039 if (client->create_player_on_auth_success) {
2040 std::string playername = client->getName();
2041 m_script->createAuth(playername, client->enc_pwd);
2043 std::string checkpwd; // not used, but needed for passing something
2044 if (!m_script->getAuth(playername, &checkpwd, NULL)) {
2045 actionstream << "Server: " << playername << " cannot be authenticated"
2046 << " (auth handler does not work?)" << std::endl;
2047 DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
2050 client->create_player_on_auth_success = false;
2053 acceptAuth(pkt->getPeerId(), wantSudo);