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minetest/src/network/serverpackethandler.cpp

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/*
Minetest
Copyright (C) 2015 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "server.h"
#include "log.h"
#include "content_abm.h"
#include "content_sao.h"
#include "emerge.h"
#include "main.h"
#include "nodedef.h"
#include "player.h"
#include "rollback_interface.h"
#include "scripting_game.h"
#include "settings.h"
#include "tool.h"
#include "version.h"
#include "network/networkprotocol.h"
#include "network/serveropcodes.h"
#include "util/base64.h"
#include "util/pointedthing.h"
#include "util/serialize.h"
void Server::handleCommand_Deprecated(NetworkPacket* pkt)
{
infostream << "Server: " << toServerCommandTable[pkt->getCommand()].name
<< " not supported anymore" << std::endl;
}
void Server::handleCommand_Init(NetworkPacket* pkt)
{
if(pkt->getSize() < 1)
return;
RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
std::string addr_s;
try {
Address address = getPeerAddress(pkt->getPeerId());
addr_s = address.serializeString();
}
catch (con::PeerNotFoundException &e) {
/*
* no peer for this packet found
* most common reason is peer timeout, e.g. peer didn't
* respond for some time, your server was overloaded or
* things like that.
*/
infostream << "Server::ProcessData(): Canceling: peer "
<< pkt->getPeerId() << " not found" << std::endl;
return;
}
// If net_proto_version is set, this client has already been handled
if (client->getState() > CS_Created) {
verbosestream << "Server: Ignoring multiple TOSERVER_INITs from "
<< addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
return;
}
verbosestream << "Server: Got TOSERVER_INIT from " << addr_s << " (peer_id="
<< pkt->getPeerId() << ")" << std::endl;
// Do not allow multiple players in simple singleplayer mode.
// This isn't a perfect way to do it, but will suffice for now
if (m_simple_singleplayer_mode && m_clients.getClientIDs().size() > 1) {
infostream << "Server: Not allowing another client (" << addr_s
<< ") to connect in simple singleplayer mode" << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SINGLEPLAYER);
return;
}
// First byte after command is maximum supported
// serialization version
u8 client_max;
u8 compression_modes;
u16 min_net_proto_version = 0;
u16 max_net_proto_version;
*pkt >> client_max >> compression_modes >> min_net_proto_version
>> max_net_proto_version;
u8 our_max = SER_FMT_VER_HIGHEST_READ;
// Use the highest version supported by both
int deployed = std::min(client_max, our_max);
// If it's lower than the lowest supported, give up.
if (deployed < SER_FMT_VER_LOWEST)
deployed = SER_FMT_VER_INVALID;
if (deployed == SER_FMT_VER_INVALID) {
actionstream << "Server: A mismatched client tried to connect from "
<< addr_s << std::endl;
infostream<<"Server: Cannot negotiate serialization version with "
<< addr_s << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
return;
}
client->setPendingSerializationVersion(deployed);
/*
Read and check network protocol version
*/
u16 net_proto_version = 0;
// Figure out a working version if it is possible at all
if (max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX) {
// If maximum is larger than our maximum, go with our maximum
if (max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
// Else go with client's maximum
else
net_proto_version = max_net_proto_version;
}
verbosestream << "Server: " << addr_s << ": Protocol version: min: "
<< min_net_proto_version << ", max: " << max_net_proto_version
<< ", chosen: " << net_proto_version << std::endl;
client->net_proto_version = net_proto_version;
// On this handler protocol version 25 is required
if (net_proto_version < 25 ||
net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
net_proto_version > SERVER_PROTOCOL_VERSION_MAX) {
actionstream << "Server: A mismatched client tried to connect from "
<< addr_s << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
return;
}
if (g_settings->getBool("strict_protocol_version_checking")) {
if (net_proto_version != LATEST_PROTOCOL_VERSION) {
actionstream << "Server: A mismatched (strict) client tried to "
<< "connect from " << addr_s << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_VERSION);
return;
}
}
// @TODO: check if we support same modes, but not required now
client->setSupportedCompressionModes(compression_modes);
m_clients.event(pkt->getPeerId(), CSE_Init);
}
void Server::handleCommand_Auth(NetworkPacket* pkt)
{
std::string addr_s;
try {
Address address = getPeerAddress(pkt->getPeerId());
addr_s = address.serializeString();
}
catch (con::PeerNotFoundException &e) {
/*
* no peer for this packet found
* most common reason is peer timeout, e.g. peer didn't
* respond for some time, your server was overloaded or
* things like that.
*/
infostream << "Server::ProcessData(): Canceling: peer "
<< pkt->getPeerId() << " not found" << std::endl;
return;
}
std::string playerName, playerPassword;
*pkt >> playerName >> playerPassword;
const char* playername = playerName.c_str();
if (playerName.size() > PLAYERNAME_SIZE) {
actionstream << "Server: Player with an too long name "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_NAME);
return;
}
if (string_allowed(playerName, PLAYERNAME_ALLOWED_CHARS) == false) {
actionstream << "Server: Player with an invalid name "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_CHARS_IN_NAME);
return;
}
if (!isSingleplayer() && strcasecmp(playername, "singleplayer") == 0) {
actionstream << "Server: Player with the name \"singleplayer\" "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_NAME);
return;
}
{
std::string reason;
if(m_script->on_prejoinplayer(playername, addr_s, reason)) {
actionstream << "Server: Player with the name \"" << playerName << "\" "
<< "tried to connect from " << addr_s << " "
<< "but it was disallowed for the following reason: "
<< reason << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_CUSTOM_STRING,
narrow_to_wide(reason.c_str()));
return;
}
}
if (playerPassword.size() > PASSWORD_SIZE) {
actionstream << "Server: Player with an too long password "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_PASSWORD);
return;
}
infostream << "Server: New connection: \"" << playerName << "\" from "
<< addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
if(!base64_is_valid(playerPassword)){
actionstream << "Server: " << playerName
<< " supplied invalid password hash" << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_PASSWORD);
return;
}
// Enforce user limit.
// Don't enforce for users that have some admin right
if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") &&
!checkPriv(playername, "server") &&
!checkPriv(playername, "ban") &&
!checkPriv(playername, "privs") &&
!checkPriv(playername, "password") &&
playername != g_settings->get("name")) {
actionstream << "Server: " << playername << " tried to join, but there"
<< " are already max_users="
<< g_settings->getU16("max_users") << " players." << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_TOO_MANY_USERS);
return;
}
std::string checkpwd; // Password hash to check against
bool has_auth = m_script->getAuth(playername, &checkpwd, NULL);
// If no authentication info exists for user, create it
if (!has_auth) {
if (!isSingleplayer() &&
g_settings->getBool("disallow_empty_password") &&
playerPassword.empty()) {
actionstream << "Server: " << playerName
<< " supplied empty password" << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_EMPTY_PASSWORD);
return;
}
std::wstring raw_default_password =
narrow_to_wide(g_settings->get("default_password"));
std::string initial_password =
translatePassword(playername, raw_default_password);
// If default_password is empty, allow any initial password
if (raw_default_password.length() == 0)
initial_password = playerPassword.c_str();
m_script->createAuth(playername, initial_password);
}
has_auth = m_script->getAuth(playername, &checkpwd, NULL);
if(!has_auth) {
actionstream << "Server: " << playerName << " cannot be authenticated"
<< " (auth handler does not work?)" << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_SERVER_FAIL);
return;
}
if(playerPassword.c_str() != checkpwd) {
actionstream << "Server: " << playerName << " supplied wrong password"
<< std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_WRONG_PASSWORD);
return;
}
RemotePlayer *player =
static_cast<RemotePlayer*>(m_env->getPlayer(playername));
if (player && player->peer_id != 0) {
errorstream << "Server: " << playername << ": Failed to emerge player"
<< " (player allocated to an another client)" << std::endl;
DenyAccess(pkt->getPeerId(), SERVER_ACCESSDENIED_ALREADY_CONNECTED);
}
m_clients.setPlayerName(pkt->getPeerId(), playername);
/*
Answer with a TOCLIENT_INIT
*/
NetworkPacket resp_pkt(TOCLIENT_AUTH_ACCEPT, 1 + 6 + 8 + 4, pkt->getPeerId());
resp_pkt << v3f(0,0,0) << (u64) m_env->getServerMap().getSeed()
<< g_settings->getFloat("dedicated_server_step");
Send(&resp_pkt);
m_clients.event(pkt->getPeerId(), CSE_Init);
}
void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
{
// [0] u8 SER_FMT_VER_HIGHEST_READ
// [1] u8[20] player_name
// [21] u8[28] password <--- can be sent without this, from old versions
if (pkt->getSize() < 1+PLAYERNAME_SIZE)
return;
RemoteClient* client = getClient(pkt->getPeerId(), CS_Created);
std::string addr_s;
try {
Address address = getPeerAddress(pkt->getPeerId());
addr_s = address.serializeString();
}
catch (con::PeerNotFoundException &e) {
/*
* no peer for this packet found
* most common reason is peer timeout, e.g. peer didn't
* respond for some time, your server was overloaded or
* things like that.
*/
infostream << "Server::ProcessData(): Canceling: peer "
<< pkt->getPeerId() << " not found" << std::endl;
return;
}
// If net_proto_version is set, this client has already been handled
if (client->getState() > CS_Created) {
verbosestream << "Server: Ignoring multiple TOSERVER_INITs from "
<< addr_s << " (peer_id=" << pkt->getPeerId() << ")" << std::endl;
return;
}
verbosestream << "Server: Got TOSERVER_INIT from " << addr_s << " (peer_id="
<< pkt->getPeerId() << ")" << std::endl;
// Do not allow multiple players in simple singleplayer mode.
// This isn't a perfect way to do it, but will suffice for now
if (m_simple_singleplayer_mode && m_clients.getClientIDs().size() > 1) {
infostream << "Server: Not allowing another client (" << addr_s
<< ") to connect in simple singleplayer mode" << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Running in simple singleplayer mode.");
return;
}
// First byte after command is maximum supported
// serialization version
u8 client_max;
*pkt >> client_max;
u8 our_max = SER_FMT_VER_HIGHEST_READ;
// Use the highest version supported by both
int deployed = std::min(client_max, our_max);
// If it's lower than the lowest supported, give up.
if (deployed < SER_FMT_VER_LOWEST)
deployed = SER_FMT_VER_INVALID;
if (deployed == SER_FMT_VER_INVALID) {
actionstream << "Server: A mismatched client tried to connect from "
<< addr_s << std::endl;
infostream<<"Server: Cannot negotiate serialization version with "
<< addr_s << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
L"Your client's version is not supported.\n"
L"Server version is ")
+ narrow_to_wide(g_version_string) + L"."
);
return;
}
client->setPendingSerializationVersion(deployed);
/*
Read and check network protocol version
*/
u16 min_net_proto_version = 0;
if (pkt->getSize() >= 1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2)
min_net_proto_version = pkt->getU16(1 + PLAYERNAME_SIZE + PASSWORD_SIZE);
// Use same version as minimum and maximum if maximum version field
// doesn't exist (backwards compatibility)
u16 max_net_proto_version = min_net_proto_version;
if (pkt->getSize() >= 1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2 + 2)
max_net_proto_version = pkt->getU16(1 + PLAYERNAME_SIZE + PASSWORD_SIZE + 2);
// Start with client's maximum version
u16 net_proto_version = max_net_proto_version;
// Figure out a working version if it is possible at all
if (max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX) {
// If maximum is larger than our maximum, go with our maximum
if (max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
// Else go with client's maximum
else
net_proto_version = max_net_proto_version;
}
verbosestream << "Server: " << addr_s << ": Protocol version: min: "
<< min_net_proto_version << ", max: " << max_net_proto_version
<< ", chosen: " << net_proto_version << std::endl;
client->net_proto_version = net_proto_version;
if (net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
net_proto_version > SERVER_PROTOCOL_VERSION_MAX) {
actionstream << "Server: A mismatched client tried to connect from "
<< addr_s << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
L"Your client's version is not supported.\n"
L"Server version is ")
+ narrow_to_wide(g_version_string) + L",\n"
+ L"server's PROTOCOL_VERSION is "
+ narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MIN))
+ L"..."
+ narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MAX))
+ L", client's PROTOCOL_VERSION is "
+ narrow_to_wide(itos(min_net_proto_version))
+ L"..."
+ narrow_to_wide(itos(max_net_proto_version))
);
return;
}
if (g_settings->getBool("strict_protocol_version_checking")) {
if (net_proto_version != LATEST_PROTOCOL_VERSION) {
actionstream << "Server: A mismatched (strict) client tried to "
<< "connect from " << addr_s << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
L"Your client's version is not supported.\n"
L"Server version is ")
+ narrow_to_wide(g_version_string) + L",\n"
+ L"server's PROTOCOL_VERSION (strict) is "
+ narrow_to_wide(itos(LATEST_PROTOCOL_VERSION))
+ L", client's PROTOCOL_VERSION is "
+ narrow_to_wide(itos(min_net_proto_version))
+ L"..."
+ narrow_to_wide(itos(max_net_proto_version))
);
return;
}
}
/*
Set up player
*/
char playername[PLAYERNAME_SIZE];
unsigned int playername_length = 0;
for (; playername_length < PLAYERNAME_SIZE; playername_length++ ) {
playername[playername_length] = pkt->getChar(1+playername_length);
if (pkt->getChar(1+playername_length) == 0)
break;
}
if (playername_length == PLAYERNAME_SIZE) {
actionstream << "Server: Player with name exceeding max length "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Name too long");
return;
}
if (playername[0]=='\0') {
actionstream << "Server: Player with an empty name "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Empty name");
return;
}
if (string_allowed(playername, PLAYERNAME_ALLOWED_CHARS) == false) {
actionstream << "Server: Player with an invalid name "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Name contains unallowed characters");
return;
}
if (!isSingleplayer() && strcasecmp(playername, "singleplayer") == 0) {
actionstream << "Server: Player with the name \"singleplayer\" "
<< "tried to connect from " << addr_s << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Name is not allowed");
return;
}
{
std::string reason;
if (m_script->on_prejoinplayer(playername, addr_s, reason)) {
actionstream << "Server: Player with the name \"" << playername << "\" "
<< "tried to connect from " << addr_s << " "
<< "but it was disallowed for the following reason: "
<< reason << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), narrow_to_wide(reason.c_str()));
return;
}
}
infostream<<"Server: New connection: \""<<playername<<"\" from "
<<addr_s<<" (peer_id="<<pkt->getPeerId()<<")"<<std::endl;
// Get password
char given_password[PASSWORD_SIZE];
if (pkt->getSize() < 1 + PLAYERNAME_SIZE + PASSWORD_SIZE) {
// old version - assume blank password
given_password[0] = 0;
}
else {
for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
given_password[i] = pkt->getChar(21 + i);
}
given_password[PASSWORD_SIZE - 1] = 0;
}
if (!base64_is_valid(given_password)) {
actionstream << "Server: " << playername
<< " supplied invalid password hash" << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Invalid password hash");
return;
}
// Enforce user limit.
// Don't enforce for users that have some admin right
if (m_clients.getClientIDs(CS_Created).size() >= g_settings->getU16("max_users") &&
!checkPriv(playername, "server") &&
!checkPriv(playername, "ban") &&
!checkPriv(playername, "privs") &&
!checkPriv(playername, "password") &&
playername != g_settings->get("name")) {
actionstream << "Server: " << playername << " tried to join, but there"
<< " are already max_users="
<< g_settings->getU16("max_users") << " players." << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Too many users.");
return;
}
std::string checkpwd; // Password hash to check against
bool has_auth = m_script->getAuth(playername, &checkpwd, NULL);
// If no authentication info exists for user, create it
if (!has_auth) {
if (!isSingleplayer() &&
g_settings->getBool("disallow_empty_password") &&
std::string(given_password) == "") {
actionstream << "Server: " << playername
<< " supplied empty password" << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Empty passwords are "
L"disallowed. Set a password and try again.");
return;
}
std::wstring raw_default_password =
narrow_to_wide(g_settings->get("default_password"));
std::string initial_password =
translatePassword(playername, raw_default_password);
// If default_password is empty, allow any initial password
if (raw_default_password.length() == 0)
initial_password = given_password;
m_script->createAuth(playername, initial_password);
}
has_auth = m_script->getAuth(playername, &checkpwd, NULL);
if (!has_auth) {
actionstream << "Server: " << playername << " cannot be authenticated"
<< " (auth handler does not work?)" << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Not allowed to login");
return;
}
if (given_password != checkpwd) {
actionstream << "Server: " << playername << " supplied wrong password"
<< std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Wrong password");
return;
}
RemotePlayer *player =
static_cast<RemotePlayer*>(m_env->getPlayer(playername));
if (player && player->peer_id != 0) {
errorstream << "Server: " << playername << ": Failed to emerge player"
<< " (player allocated to an another client)" << std::endl;
DenyAccess_Legacy(pkt->getPeerId(), L"Another client is connected with this "
L"name. If your client closed unexpectedly, try again in "
L"a minute.");
}
m_clients.setPlayerName(pkt->getPeerId(), playername);
/*
Answer with a TOCLIENT_INIT
*/
NetworkPacket resp_pkt(TOCLIENT_INIT_LEGACY, 1 + 6 + 8 + 4,
pkt->getPeerId());
resp_pkt << (u8) deployed << (v3s16) floatToInt(v3f(0,0,0), BS)
<< (u64) m_env->getServerMap().getSeed()
<< g_settings->getFloat("dedicated_server_step");
Send(&resp_pkt);
m_clients.event(pkt->getPeerId(), CSE_Init);
}
void Server::handleCommand_Init2(NetworkPacket* pkt)
{
verbosestream << "Server: Got TOSERVER_INIT2 from "
<< pkt->getPeerId() << std::endl;
m_clients.event(pkt->getPeerId(), CSE_GotInit2);
u16 protocol_version = m_clients.getProtocolVersion(pkt->getPeerId());
///// begin compatibility code
PlayerSAO* playersao = NULL;
if (protocol_version <= 22) {
playersao = StageTwoClientInit(pkt->getPeerId());
if (playersao == NULL) {
errorstream
<< "TOSERVER_INIT2 stage 2 client init failed for peer "
<< pkt->getPeerId() << std::endl;
return;
}
}
///// end compatibility code
/*
Send some initialization data
*/
infostream << "Server: Sending content to "
<< getPlayerName(pkt->getPeerId()) << std::endl;
// Send player movement settings
SendMovement(pkt->getPeerId());
// Send item definitions
SendItemDef(pkt->getPeerId(), m_itemdef, protocol_version);
// Send node definitions
SendNodeDef(pkt->getPeerId(), m_nodedef, protocol_version);
m_clients.event(pkt->getPeerId(), CSE_SetDefinitionsSent);
// Send media announcement
sendMediaAnnouncement(pkt->getPeerId());
// Send detached inventories
sendDetachedInventories(pkt->getPeerId());
// Send time of day
u16 time = m_env->getTimeOfDay();
float time_speed = g_settings->getFloat("time_speed");
SendTimeOfDay(pkt->getPeerId(), time, time_speed);
///// begin compatibility code
if (protocol_version <= 22) {
m_clients.event(pkt->getPeerId(), CSE_SetClientReady);
m_script->on_joinplayer(playersao);
}
///// end compatibility code
// Warnings about protocol version can be issued here
if (getClient(pkt->getPeerId())->net_proto_version < LATEST_PROTOCOL_VERSION) {
SendChatMessage(pkt->getPeerId(), L"# Server: WARNING: YOUR CLIENT'S "
L"VERSION MAY NOT BE FULLY COMPATIBLE WITH THIS SERVER!");
}
}
void Server::handleCommand_RequestMedia(NetworkPacket* pkt)
{
std::vector<std::string> tosend;
u16 numfiles;
*pkt >> numfiles;
infostream << "Sending " << numfiles << " files to "
<< getPlayerName(pkt->getPeerId()) << std::endl;
verbosestream << "TOSERVER_REQUEST_MEDIA: " << std::endl;
for (u16 i = 0; i < numfiles; i++) {
std::string name;
*pkt >> name;
tosend.push_back(name);
verbosestream << "TOSERVER_REQUEST_MEDIA: requested file "
<< name << std::endl;
}
sendRequestedMedia(pkt->getPeerId(), tosend);
}
void Server::handleCommand_ReceivedMedia(NetworkPacket* pkt)
{
}
void Server::handleCommand_ClientReady(NetworkPacket* pkt)
{
u16 peer_id = pkt->getPeerId();
u16 peer_proto_ver = getClient(peer_id, CS_InitDone)->net_proto_version;
// clients <= protocol version 22 did not send ready message,
// they're already initialized
if (peer_proto_ver <= 22) {
infostream << "Client sent message not expected by a "
<< "client using protocol version <= 22,"
<< "disconnecting peer_id: " << peer_id << std::endl;
m_con.DisconnectPeer(peer_id);
return;
}
PlayerSAO* playersao = StageTwoClientInit(peer_id);
if (playersao == NULL) {
errorstream
<< "TOSERVER_CLIENT_READY stage 2 client init failed for peer_id: "
<< peer_id << std::endl;
m_con.DisconnectPeer(peer_id);
return;
}
if (pkt->getSize() < 8) {
errorstream
<< "TOSERVER_CLIENT_READY client sent inconsistent data, disconnecting peer_id: "
<< peer_id << std::endl;
m_con.DisconnectPeer(peer_id);
return;
}
u8 major_ver, minor_ver, patch_ver, reserved;
std::string full_ver;
*pkt >> major_ver >> minor_ver >> patch_ver >> reserved >> full_ver;
m_clients.setClientVersion(
peer_id, major_ver, minor_ver, patch_ver,
full_ver);
m_clients.event(peer_id, CSE_SetClientReady);
m_script->on_joinplayer(playersao);
}
void Server::handleCommand_GotBlocks(NetworkPacket* pkt)
{
if (pkt->getSize() < 1)
return;
/*
[0] u16 command
[2] u8 count
[3] v3s16 pos_0
[3+6] v3s16 pos_1
...
*/
u8 count;
*pkt >> count;
RemoteClient *client = getClient(pkt->getPeerId());
for (u16 i = 0; i < count; i++) {
if ((s16)pkt->getSize() < 1 + (i + 1) * 6)
throw con::InvalidIncomingDataException
("GOTBLOCKS length is too short");
v3s16 p;
*pkt >> p;
client->GotBlock(p);
}
}
void Server::handleCommand_PlayerPos(NetworkPacket* pkt)
{
if (pkt->getSize() < 12 + 12 + 4 + 4)
return;
v3s32 ps, ss;
s32 f32pitch, f32yaw;
*pkt >> ps;
*pkt >> ss;
*pkt >> f32pitch;
*pkt >> f32yaw;
f32 pitch = (f32)f32pitch / 100.0;
f32 yaw = (f32)f32yaw / 100.0;
u32 keyPressed = 0;
if (pkt->getSize() >= 12 + 12 + 4 + 4 + 4)
*pkt >> keyPressed;
v3f position((f32)ps.X / 100.0, (f32)ps.Y / 100.0, (f32)ps.Z / 100.0);
v3f speed((f32)ss.X / 100.0, (f32)ss.Y / 100.0, (f32)ss.Z / 100.0);
pitch = modulo360f(pitch);
yaw = modulo360f(yaw);
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
// If player is dead we don't care of this packet
if (player->isDead()) {
verbosestream << "TOSERVER_PLAYERPOS: " << player->getName()
<< " is dead. Ignoring packet";
return;
}
PlayerSAO *playersao = player->getPlayerSAO();
if (playersao == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
player->setPosition(position);
player->setSpeed(speed);
player->setPitch(pitch);
player->setYaw(yaw);
player->keyPressed = keyPressed;
player->control.up = (keyPressed & 1);
player->control.down = (keyPressed & 2);
player->control.left = (keyPressed & 4);
player->control.right = (keyPressed & 8);
player->control.jump = (keyPressed & 16);
player->control.aux1 = (keyPressed & 32);
player->control.sneak = (keyPressed & 64);
player->control.LMB = (keyPressed & 128);
player->control.RMB = (keyPressed & 256);
if (playersao->checkMovementCheat()) {
// Call callbacks
m_script->on_cheat(playersao, "moved_too_fast");
SendMovePlayer(pkt->getPeerId());
}
}
void Server::handleCommand_DeletedBlocks(NetworkPacket* pkt)
{
if (pkt->getSize() < 1)
return;
/*
[0] u16 command
[2] u8 count
[3] v3s16 pos_0
[3+6] v3s16 pos_1
...
*/
u8 count;
*pkt >> count;
RemoteClient *client = getClient(pkt->getPeerId());
for (u16 i = 0; i < count; i++) {
if ((s16)pkt->getSize() < 1 + (i + 1) * 6)
throw con::InvalidIncomingDataException
("DELETEDBLOCKS length is too short");
v3s16 p;
*pkt >> p;
client->SetBlockNotSent(p);
}
}
void Server::handleCommand_InventoryAction(NetworkPacket* pkt)
{
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
PlayerSAO *playersao = player->getPlayerSAO();
if (playersao == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
// Strip command and create a stream
std::string datastring(pkt->getString(0), pkt->getSize());
verbosestream << "TOSERVER_INVENTORY_ACTION: data=" << datastring
<< std::endl;
std::istringstream is(datastring, std::ios_base::binary);
// Create an action
InventoryAction *a = InventoryAction::deSerialize(is);
if (a == NULL) {
infostream << "TOSERVER_INVENTORY_ACTION: "
<< "InventoryAction::deSerialize() returned NULL"
<< std::endl;
return;
}
// If something goes wrong, this player is to blame
RollbackScopeActor rollback_scope(m_rollback,
std::string("player:")+player->getName());
/*
Note: Always set inventory not sent, to repair cases
where the client made a bad prediction.
*/
/*
Handle restrictions and special cases of the move action
*/
if (a->getType() == IACTION_MOVE) {
IMoveAction *ma = (IMoveAction*)a;
ma->from_inv.applyCurrentPlayer(player->getName());
ma->to_inv.applyCurrentPlayer(player->getName());
setInventoryModified(ma->from_inv, false);
setInventoryModified(ma->to_inv, false);
bool from_inv_is_current_player =
(ma->from_inv.type == InventoryLocation::PLAYER) &&
(ma->from_inv.name == player->getName());
bool to_inv_is_current_player =
(ma->to_inv.type == InventoryLocation::PLAYER) &&
(ma->to_inv.name == player->getName());
/*
Disable moving items out of craftpreview
*/
if (ma->from_list == "craftpreview") {
infostream << "Ignoring IMoveAction from "
<< (ma->from_inv.dump()) << ":" << ma->from_list
<< " to " << (ma->to_inv.dump()) << ":" << ma->to_list
<< " because src is " << ma->from_list << std::endl;
delete a;
return;
}
/*
Disable moving items into craftresult and craftpreview
*/
if (ma->to_list == "craftpreview" || ma->to_list == "craftresult") {
infostream << "Ignoring IMoveAction from "
<< (ma->from_inv.dump()) << ":" << ma->from_list
<< " to " << (ma->to_inv.dump()) << ":" << ma->to_list
<< " because dst is " << ma->to_list << std::endl;
delete a;
return;
}
// Disallow moving items in elsewhere than player's inventory
// if not allowed to interact
if (!checkPriv(player->getName(), "interact") &&
(!from_inv_is_current_player ||
!to_inv_is_current_player)) {
infostream << "Cannot move outside of player's inventory: "
<< "No interact privilege" << std::endl;
delete a;
return;
}
}
/*
Handle restrictions and special cases of the drop action
*/
else if (a->getType() == IACTION_DROP) {
IDropAction *da = (IDropAction*)a;
da->from_inv.applyCurrentPlayer(player->getName());
setInventoryModified(da->from_inv, false);
/*
Disable dropping items out of craftpreview
*/
if (da->from_list == "craftpreview") {
infostream << "Ignoring IDropAction from "
<< (da->from_inv.dump()) << ":" << da->from_list
<< " because src is " << da->from_list << std::endl;
delete a;
return;
}
// Disallow dropping items if not allowed to interact
if (!checkPriv(player->getName(), "interact")) {
delete a;
return;
}
}
/*
Handle restrictions and special cases of the craft action
*/
else if (a->getType() == IACTION_CRAFT) {
ICraftAction *ca = (ICraftAction*)a;
ca->craft_inv.applyCurrentPlayer(player->getName());
setInventoryModified(ca->craft_inv, false);
//bool craft_inv_is_current_player =
// (ca->craft_inv.type == InventoryLocation::PLAYER) &&
// (ca->craft_inv.name == player->getName());
// Disallow crafting if not allowed to interact
if (!checkPriv(player->getName(), "interact")) {
infostream << "Cannot craft: "
<< "No interact privilege" << std::endl;
delete a;
return;
}
}
// Do the action
a->apply(this, playersao, this);
// Eat the action
delete a;
SendInventory(playersao);
}
void Server::handleCommand_ChatMessage(NetworkPacket* pkt)
{
/*
u16 command
u16 length
wstring message
*/
u16 len;
*pkt >> len;
std::wstring message;
for (u16 i = 0; i < len; i++) {
u16 tmp_wchar;
*pkt >> tmp_wchar;
message += (wchar_t)tmp_wchar;
}
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
// If something goes wrong, this player is to blame
RollbackScopeActor rollback_scope(m_rollback,
std::string("player:")+player->getName());
// Get player name of this client
std::wstring name = narrow_to_wide(player->getName());
// Run script hook
bool ate = m_script->on_chat_message(player->getName(),
wide_to_narrow(message));
// If script ate the message, don't proceed
if (ate)
return;
// Line to send to players
std::wstring line;
// Whether to send to the player that sent the line
bool send_to_sender_only = false;
// Commands are implemented in Lua, so only catch invalid
// commands that were not "eaten" and send an error back
if (message[0] == L'/') {
message = message.substr(1);
send_to_sender_only = true;
if (message.length() == 0)
line += L"-!- Empty command";
else
line += L"-!- Invalid command: " + str_split(message, L' ')[0];
}
else {
if (checkPriv(player->getName(), "shout")) {
line += L"<";
line += name;
line += L"> ";
line += message;
} else {
line += L"-!- You don't have permission to shout.";
send_to_sender_only = true;
}
}
if (line != L"")
{
/*
Send the message to sender
*/
if (send_to_sender_only) {
SendChatMessage(pkt->getPeerId(), line);
}
/*
Send the message to others
*/
else {
actionstream << "CHAT: " << wide_to_narrow(line)<<std::endl;
std::vector<u16> clients = m_clients.getClientIDs();
for (std::vector<u16>::iterator i = clients.begin();
i != clients.end(); ++i) {
if (*i != pkt->getPeerId())
SendChatMessage(*i, line);
}
}
}
}
void Server::handleCommand_Damage(NetworkPacket* pkt)
{
u8 damage;
*pkt >> damage;
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
PlayerSAO *playersao = player->getPlayerSAO();
if (playersao == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
if (g_settings->getBool("enable_damage")) {
actionstream << player->getName() << " damaged by "
<< (int)damage << " hp at " << PP(player->getPosition() / BS)
<< std::endl;
playersao->setHP(playersao->getHP() - damage);
SendPlayerHPOrDie(playersao->getPeerID(), playersao->getHP() == 0);
}
}
void Server::handleCommand_Breath(NetworkPacket* pkt)
{
u16 breath;
*pkt >> breath;
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
/*
* If player is dead, we don't need to update the breath
* He is dead !
*/
if (player->isDead()) {
verbosestream << "TOSERVER_BREATH: " << player->getName()
<< " is dead. Ignoring packet";
return;
}
PlayerSAO *playersao = player->getPlayerSAO();
if (playersao == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
playersao->setBreath(breath);
SendPlayerBreath(pkt->getPeerId());
}
void Server::handleCommand_Password(NetworkPacket* pkt)
{
errorstream << "PAssword packet size: " << pkt->getSize() << " size required: " << PASSWORD_SIZE * 2 << std::endl;
if ((pkt->getCommand() == TOSERVER_PASSWORD && pkt->getSize() < 4) ||
pkt->getSize() != PASSWORD_SIZE * 2)
return;
std::string oldpwd;
std::string newpwd;
if (pkt->getCommand() == TOSERVER_PASSWORD) {
*pkt >> oldpwd >> newpwd;
}
// 13/03/15
// Protocol v24 compat. Please remove in 1 year after
// client convergence to 0.4.13/0.5.x
else {
for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
char c = pkt->getChar(i);
if (c == 0)
break;
oldpwd += c;
}
for (u16 i = 0; i < PASSWORD_SIZE - 1; i++) {
char c = pkt->getChar(PASSWORD_SIZE + i);
if (c == 0)
break;
newpwd += c;
}
}
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
if (!base64_is_valid(newpwd)) {
infostream<<"Server: " << player->getName() <<
" supplied invalid password hash" << std::endl;
// Wrong old password supplied!!
SendChatMessage(pkt->getPeerId(), L"Invalid new password hash supplied. Password NOT changed.");
return;
}
infostream << "Server: Client requests a password change from "
<< "'" << oldpwd << "' to '" << newpwd << "'" << std::endl;
std::string playername = player->getName();
std::string checkpwd;
m_script->getAuth(playername, &checkpwd, NULL);
if (oldpwd != checkpwd) {
infostream << "Server: invalid old password" << std::endl;
// Wrong old password supplied!!
SendChatMessage(pkt->getPeerId(), L"Invalid old password supplied. Password NOT changed.");
return;
}
bool success = m_script->setPassword(playername, newpwd);
if (success) {
actionstream << player->getName() << " changes password" << std::endl;
SendChatMessage(pkt->getPeerId(), L"Password change successful.");
} else {
actionstream << player->getName() << " tries to change password but "
<< "it fails" << std::endl;
SendChatMessage(pkt->getPeerId(), L"Password change failed or unavailable.");
}
}
void Server::handleCommand_PlayerItem(NetworkPacket* pkt)
{
if (pkt->getSize() < 2)
return;
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
PlayerSAO *playersao = player->getPlayerSAO();
if (playersao == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
u16 item;
*pkt >> item;
playersao->setWieldIndex(item);
}
void Server::handleCommand_Respawn(NetworkPacket* pkt)
{
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
if (!player->isDead())
return;
RespawnPlayer(pkt->getPeerId());
actionstream << player->getName() << " respawns at "
<< PP(player->getPosition()/BS) << std::endl;
// ActiveObject is added to environment in AsyncRunStep after
// the previous addition has been successfully removed
}
void Server::handleCommand_Interact(NetworkPacket* pkt)
{
std::string datastring(pkt->getString(0), pkt->getSize());
std::istringstream is(datastring, std::ios_base::binary);
/*
[0] u16 command
[2] u8 action
[3] u16 item
[5] u32 length of the next item
[9] serialized PointedThing
actions:
0: start digging (from undersurface) or use
1: stop digging (all parameters ignored)
2: digging completed
3: place block or item (to abovesurface)
4: use item
*/
u8 action = readU8(is);
u16 item_i = readU16(is);
std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
PointedThing pointed;
pointed.deSerialize(tmp_is);
verbosestream << "TOSERVER_INTERACT: action=" << (int)action << ", item="
<< item_i << ", pointed=" << pointed.dump() << std::endl;
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
PlayerSAO *playersao = player->getPlayerSAO();
if (playersao == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
if (player->isDead()) {
verbosestream << "TOSERVER_INTERACT: " << player->getName()
<< " is dead. Ignoring packet";
return;
}
v3f player_pos = playersao->getLastGoodPosition();
// Update wielded item
playersao->setWieldIndex(item_i);
// Get pointed to node (undefined if not POINTEDTYPE_NODE)
v3s16 p_under = pointed.node_undersurface;
v3s16 p_above = pointed.node_abovesurface;
// Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
ServerActiveObject *pointed_object = NULL;
if (pointed.type == POINTEDTHING_OBJECT) {
pointed_object = m_env->getActiveObject(pointed.object_id);
if (pointed_object == NULL) {
verbosestream << "TOSERVER_INTERACT: "
"pointed object is NULL" << std::endl;
return;
}
}
v3f pointed_pos_under = player_pos;
v3f pointed_pos_above = player_pos;
if (pointed.type == POINTEDTHING_NODE) {
pointed_pos_under = intToFloat(p_under, BS);
pointed_pos_above = intToFloat(p_above, BS);
}
else if (pointed.type == POINTEDTHING_OBJECT) {
pointed_pos_under = pointed_object->getBasePosition();
pointed_pos_above = pointed_pos_under;
}
/*
Check that target is reasonably close
(only when digging or placing things)
*/
if (action == 0 || action == 2 || action == 3) {
float d = player_pos.getDistanceFrom(pointed_pos_under);
float max_d = BS * 14; // Just some large enough value
if (d > max_d) {
actionstream << "Player " << player->getName()
<< " tried to access " << pointed.dump()
<< " from too far: "
<< "d=" << d <<", max_d=" << max_d
<< ". ignoring." << std::endl;
// Re-send block to revert change on client-side
RemoteClient *client = getClient(pkt->getPeerId());
v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
client->SetBlockNotSent(blockpos);
// Call callbacks
m_script->on_cheat(playersao, "interacted_too_far");
// Do nothing else
return;
}
}
/*
Make sure the player is allowed to do it
*/
if (!checkPriv(player->getName(), "interact")) {
actionstream<<player->getName()<<" attempted to interact with "
<<pointed.dump()<<" without 'interact' privilege"
<<std::endl;
// Re-send block to revert change on client-side
RemoteClient *client = getClient(pkt->getPeerId());
// Digging completed -> under
if (action == 2) {
v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
client->SetBlockNotSent(blockpos);
}
// Placement -> above
if (action == 3) {
v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
client->SetBlockNotSent(blockpos);
}
return;
}
/*
If something goes wrong, this player is to blame
*/
RollbackScopeActor rollback_scope(m_rollback,
std::string("player:")+player->getName());
/*
0: start digging or punch object
*/
if (action == 0) {
if (pointed.type == POINTEDTHING_NODE) {
/*
NOTE: This can be used in the future to check if
somebody is cheating, by checking the timing.
*/
MapNode n(CONTENT_IGNORE);
bool pos_ok;
n = m_env->getMap().getNodeNoEx(p_under, &pos_ok);
if (pos_ok)
n = m_env->getMap().getNodeNoEx(p_under, &pos_ok);
if (!pos_ok) {
infostream << "Server: Not punching: Node not found."
<< " Adding block to emerge queue."
<< std::endl;
m_emerge->enqueueBlockEmerge(pkt->getPeerId(), getNodeBlockPos(p_above), false);
}
if (n.getContent() != CONTENT_IGNORE)
m_script->node_on_punch(p_under, n, playersao, pointed);
// Cheat prevention
playersao->noCheatDigStart(p_under);
}
else if (pointed.type == POINTEDTHING_OBJECT) {
// Skip if object has been removed
if (pointed_object->m_removed)
return;
actionstream<<player->getName()<<" punches object "
<<pointed.object_id<<": "
<<pointed_object->getDescription()<<std::endl;
ItemStack punchitem = playersao->getWieldedItem();
ToolCapabilities toolcap =
punchitem.getToolCapabilities(m_itemdef);
v3f dir = (pointed_object->getBasePosition() -
(player->getPosition() + player->getEyeOffset())
).normalize();
float time_from_last_punch =
playersao->resetTimeFromLastPunch();
s16 src_original_hp = pointed_object->getHP();
s16 dst_origin_hp = playersao->getHP();
pointed_object->punch(dir, &toolcap, playersao,
time_from_last_punch);
// If the object is a player and its HP changed
if (src_original_hp != pointed_object->getHP() &&
pointed_object->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
SendPlayerHPOrDie(((PlayerSAO*)pointed_object)->getPeerID(),
pointed_object->getHP() == 0);
}
// If the puncher is a player and its HP changed
if (dst_origin_hp != playersao->getHP()) {
SendPlayerHPOrDie(playersao->getPeerID(), playersao->getHP() == 0);
}
}
} // action == 0
/*
1: stop digging
*/
else if (action == 1) {
} // action == 1
/*
2: Digging completed
*/
else if (action == 2) {
// Only digging of nodes
if (pointed.type == POINTEDTHING_NODE) {
bool pos_ok;
MapNode n = m_env->getMap().getNodeNoEx(p_under, &pos_ok);
if (!pos_ok) {
infostream << "Server: Not finishing digging: Node not found."
<< " Adding block to emerge queue."
<< std::endl;
m_emerge->enqueueBlockEmerge(pkt->getPeerId(), getNodeBlockPos(p_above), false);
}
/* Cheat prevention */
bool is_valid_dig = true;
if (!isSingleplayer() && !g_settings->getBool("disable_anticheat")) {
v3s16 nocheat_p = playersao->getNoCheatDigPos();
float nocheat_t = playersao->getNoCheatDigTime();
playersao->noCheatDigEnd();
// If player didn't start digging this, ignore dig
if (nocheat_p != p_under) {
infostream << "Server: NoCheat: " << player->getName()
<< " started digging "
<< PP(nocheat_p) << " and completed digging "
<< PP(p_under) << "; not digging." << std::endl;
is_valid_dig = false;
// Call callbacks
m_script->on_cheat(playersao, "finished_unknown_dig");
}
// Get player's wielded item
ItemStack playeritem;
InventoryList *mlist = playersao->getInventory()->getList("main");
if (mlist != NULL)
playeritem = mlist->getItem(playersao->getWieldIndex());
ToolCapabilities playeritem_toolcap =
playeritem.getToolCapabilities(m_itemdef);
// Get diggability and expected digging time
DigParams params = getDigParams(m_nodedef->get(n).groups,
&playeritem_toolcap);
// If can't dig, try hand
if (!params.diggable) {
const ItemDefinition &hand = m_itemdef->get("");
const ToolCapabilities *tp = hand.tool_capabilities;
if (tp)
params = getDigParams(m_nodedef->get(n).groups, tp);
}
// If can't dig, ignore dig
if (!params.diggable) {
infostream << "Server: NoCheat: " << player->getName()
<< " completed digging " << PP(p_under)
<< ", which is not diggable with tool. not digging."
<< std::endl;
is_valid_dig = false;
// Call callbacks
m_script->on_cheat(playersao, "dug_unbreakable");
}
// Check digging time
// If already invalidated, we don't have to
if (!is_valid_dig) {
// Well not our problem then
}
// Clean and long dig
else if (params.time > 2.0 && nocheat_t * 1.2 > params.time) {
// All is good, but grab time from pool; don't care if
// it's actually available
playersao->getDigPool().grab(params.time);
}
// Short or laggy dig
// Try getting the time from pool
else if (playersao->getDigPool().grab(params.time)) {
// All is good
}
// Dig not possible
else {
infostream << "Server: NoCheat: " << player->getName()
<< " completed digging " << PP(p_under)
<< "too fast; not digging." << std::endl;
is_valid_dig = false;
// Call callbacks
m_script->on_cheat(playersao, "dug_too_fast");
}
}
/* Actually dig node */
if (is_valid_dig && n.getContent() != CONTENT_IGNORE)
m_script->node_on_dig(p_under, n, playersao);
v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
RemoteClient *client = getClient(pkt->getPeerId());
// Send unusual result (that is, node not being removed)
if (m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR) {
// Re-send block to revert change on client-side
client->SetBlockNotSent(blockpos);
}
else {
client->ResendBlockIfOnWire(blockpos);
}
}
} // action == 2
/*
3: place block or right-click object
*/
else if (action == 3) {
ItemStack item = playersao->getWieldedItem();
// Reset build time counter
if (pointed.type == POINTEDTHING_NODE &&
item.getDefinition(m_itemdef).type == ITEM_NODE)
getClient(pkt->getPeerId())->m_time_from_building = 0.0;
if (pointed.type == POINTEDTHING_OBJECT) {
// Right click object
// Skip if object has been removed
if (pointed_object->m_removed)
return;
actionstream << player->getName() << " right-clicks object "
<< pointed.object_id << ": "
<< pointed_object->getDescription() << std::endl;
// Do stuff
pointed_object->rightClick(playersao);
}
else if (m_script->item_OnPlace(
item, playersao, pointed)) {
// Placement was handled in lua
// Apply returned ItemStack
if (playersao->setWieldedItem(item)) {
SendInventory(playersao);
}
}
// If item has node placement prediction, always send the
// blocks to make sure the client knows what exactly happened
RemoteClient *client = getClient(pkt->getPeerId());
v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
v3s16 blockpos2 = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
if (item.getDefinition(m_itemdef).node_placement_prediction != "") {
client->SetBlockNotSent(blockpos);
if (blockpos2 != blockpos) {
client->SetBlockNotSent(blockpos2);
}
}
else {
client->ResendBlockIfOnWire(blockpos);
if (blockpos2 != blockpos) {
client->ResendBlockIfOnWire(blockpos2);
}
}
} // action == 3
/*
4: use
*/
else if (action == 4) {
ItemStack item = playersao->getWieldedItem();
actionstream << player->getName() << " uses " << item.name
<< ", pointing at " << pointed.dump() << std::endl;
if (m_script->item_OnUse(
item, playersao, pointed)) {
// Apply returned ItemStack
if (playersao->setWieldedItem(item)) {
SendInventory(playersao);
}
}
} // action == 4
/*
Catch invalid actions
*/
else {
infostream << "WARNING: Server: Invalid action "
<< action << std::endl;
}
}
void Server::handleCommand_RemovedSounds(NetworkPacket* pkt)
{
u16 num;
*pkt >> num;
for (u16 k = 0; k < num; k++) {
s32 id;
*pkt >> id;
std::map<s32, ServerPlayingSound>::iterator i =
m_playing_sounds.find(id);
if (i == m_playing_sounds.end())
continue;
ServerPlayingSound &psound = i->second;
psound.clients.erase(pkt->getPeerId());
if (psound.clients.empty())
m_playing_sounds.erase(i++);
}
}
void Server::handleCommand_NodeMetaFields(NetworkPacket* pkt)
{
v3s16 p;
std::string formname;
u16 num;
*pkt >> p >> formname >> num;
std::map<std::string, std::string> fields;
for (u16 k = 0; k < num; k++) {
std::string fieldname;
*pkt >> fieldname;
fields[fieldname] = pkt->readLongString();
}
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
PlayerSAO *playersao = player->getPlayerSAO();
if (playersao == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
// If something goes wrong, this player is to blame
RollbackScopeActor rollback_scope(m_rollback,
std::string("player:")+player->getName());
// Check the target node for rollback data; leave others unnoticed
RollbackNode rn_old(&m_env->getMap(), p, this);
m_script->node_on_receive_fields(p, formname, fields, playersao);
// Report rollback data
RollbackNode rn_new(&m_env->getMap(), p, this);
if (rollback() && rn_new != rn_old) {
RollbackAction action;
action.setSetNode(p, rn_old, rn_new);
rollback()->reportAction(action);
}
}
void Server::handleCommand_InventoryFields(NetworkPacket* pkt)
{
std::string formname;
u16 num;
*pkt >> formname >> num;
std::map<std::string, std::string> fields;
for (u16 k = 0; k < num; k++) {
std::string fieldname;
*pkt >> fieldname;
fields[fieldname] = pkt->readLongString();
}
Player *player = m_env->getPlayer(pkt->getPeerId());
if (player == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
PlayerSAO *playersao = player->getPlayerSAO();
if (playersao == NULL) {
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
return;
}
m_script->on_playerReceiveFields(playersao, formname, fields);
}
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