Rename packethandler/{client,server}.cpp to {client,server}packethandler.cpp

* Requested by @Zeno-
* Approved by @nerzhul

1 files changed, 1847 insertions, 0 deletions

diff --git a/src/network/serverpackethandler.cpp b/src/network/serverpackethandler.cpp
new file mode 100644
index 000000000..bb3a53463
--- /dev/null
+++ b/src/network/serverpackethandler.cpp
@@ -0,0 +1,1847 @@
+/*
+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(): Cancelling: 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(minetest_version_simple) + 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(minetest_version_simple) + 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(minetest_version_simple) + 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,"
+			<< "disconnecing 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;
+	*pkt >> major_ver >> minor_ver >> patch_ver;
+
+	m_clients.setClientVersion(
+			peer_id, major_ver, minor_ver, patch_ver,
+			std::string(pkt->getString(6),(u16) pkt->getU8(4)));
+
+	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(): Cancelling: "
+				"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(): Cancelling: "
+				"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(): Cancelling: "
+				"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(): Cancelling: "
+				"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);
+		setInventoryModified(ma->to_inv);
+
+		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);
+
+		/*
+			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);
+
+		//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;
+}
+
+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(): Cancelling: "
+				"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(): Cancelling: "
+				"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(): Cancelling: "
+				"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(): Cancelling: "
+				"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(): Cancelling: "
+				"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(): Cancelling: "
+				"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 inavailable.");
+	}
+}
+
+void Server::handleCommand_PlayerItem(NetworkPacket* pkt)
+{
+	if (pkt->getSize() < 2)
+		return;
+
+	Player *player = m_env->getPlayer(pkt->getPeerId());
+	if (player == NULL) {
+		errorstream << "Server::ProcessData(): Cancelling: "
+				"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(): Cancelling: "
+				"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(): Cancelling: "
+				"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 succesfully 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(): Cancelling: "
+				"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(): Cancelling: "
+				"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
+			playersao->setWieldedItem(item);
+		}
+
+	} // 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(): Cancelling: "
+				"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(): Cancelling: "
+				"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);
+}