Network Layer 7 rework (Packet handling)

* Move networkcode to a dedicated directory
* Rename clientserver.h to network/networkprotocol.h (Better name) and sanitize some includes
* Create object NetworkPacket
  * It stores command (opcode) and data separated
  * It also stores peer_id
  * Data reading can be done by using a streaming interface
* Change packet routing analysis
  * Remove old conditional analysis
  * Now uses function pointed analysis and add connection state ({Client,Server}::handlers)
  * Connection state permit to categorize condition to handle before analyze packets
  * Create a handler for depreciated messages, instead of duplicating code

11 files changed, 1614 insertions, 0 deletions

diff --git a/src/network/clientopcodes.cpp b/src/network/clientopcodes.cpp
new file mode 100644
index 000000000..247c67157
--- /dev/null
+++ b/src/network/clientopcodes.cpp
@@ -0,0 +1,110 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+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 "clientopcodes.h"
+
+const static ToClientCommandHandler null_command_handler = {"TOCLIENT_NULL", TOCLIENT_STATE_ALL, &Client::handleCommand_Null};
+
+const ToClientCommandHandler toClientCommandTable[TOCLIENT_NUM_MSG_TYPES] =
+{
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	{ "TOCLIENT_INIT",                     TOCLIENT_STATE_NOT_CONNECTED, &Client::handleCommand_Init }, // 0x10
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	{ "TOCLIENT_BLOCKDATA",                TOCLIENT_STATE_CONNECTED, &Client::handleCommand_BlockData }, // 0x20
+	{ "TOCLIENT_ADDNODE",                  TOCLIENT_STATE_CONNECTED, &Client::handleCommand_AddNode }, // 0x21
+	{ "TOCLIENT_REMOVENODE",               TOCLIENT_STATE_CONNECTED, &Client::handleCommand_RemoveNode }, // 0x22
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	{ "TOCLIENT_INVENTORY",                TOCLIENT_STATE_CONNECTED, &Client::handleCommand_Inventory }, // 0x27
+	null_command_handler,
+	{ "TOCLIENT_TIME_OF_DAY",              TOCLIENT_STATE_CONNECTED, &Client::handleCommand_TimeOfDay }, // 0x29
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	null_command_handler,
+	{ "TOCLIENT_CHAT_MESSAGE",             TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ChatMessage }, // 0x30
+	{ "TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ActiveObjectRemoveAdd }, // 0x31
+	{ "TOCLIENT_ACTIVE_OBJECT_MESSAGES",   TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ActiveObjectMessages }, // 0x32
+	{ "TOCLIENT_HP",                       TOCLIENT_STATE_CONNECTED, &Client::handleCommand_HP }, // 0x33
+	{ "TOCLIENT_MOVE_PLAYER",              TOCLIENT_STATE_CONNECTED, &Client::handleCommand_MovePlayer }, // 0x34
+	{ "TOCLIENT_ACCESS_DENIED",            TOCLIENT_STATE_NOT_CONNECTED, &Client::handleCommand_AccessDenied }, // 0x35
+	{ "TOCLIENT_PLAYERITEM",               TOCLIENT_STATE_CONNECTED, &Client::handleCommand_PlayerItem }, // 0x36
+	{ "TOCLIENT_DEATHSCREEN",              TOCLIENT_STATE_CONNECTED, &Client::handleCommand_DeathScreen }, // 0x37
+	{ "TOCLIENT_MEDIA",                    TOCLIENT_STATE_CONNECTED, &Client::handleCommand_Media }, // 0x38
+	{ "TOCLIENT_TOOLDEF",                  TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ToolDef }, // 0x39
+	{ "TOCLIENT_NODEDEF",                  TOCLIENT_STATE_CONNECTED, &Client::handleCommand_NodeDef }, // 0x3a
+	{ "TOCLIENT_CRAFTITEMDEF",             TOCLIENT_STATE_CONNECTED, &Client::handleCommand_CraftItemDef }, // 0x3b
+	{ "TOCLIENT_ANNOUNCE_MEDIA",           TOCLIENT_STATE_CONNECTED, &Client::handleCommand_AnnounceMedia }, // 0x3c
+	{ "TOCLIENT_ITEMDEF",                  TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ItemDef }, // 0x3d
+	null_command_handler,
+	{ "TOCLIENT_PLAY_SOUND",               TOCLIENT_STATE_CONNECTED, &Client::handleCommand_PlaySound }, // 0x3f
+	{ "TOCLIENT_STOP_SOUND",               TOCLIENT_STATE_CONNECTED, &Client::handleCommand_StopSound }, // 0x40
+	{ "TOCLIENT_PRIVILEGES",               TOCLIENT_STATE_CONNECTED, &Client::handleCommand_Privileges }, // 0x41
+	{ "TOCLIENT_INVENTORY_FORMSPEC",       TOCLIENT_STATE_CONNECTED, &Client::handleCommand_InventoryFormSpec }, // 0x42
+	{ "TOCLIENT_DETACHED_INVENTORY",       TOCLIENT_STATE_CONNECTED, &Client::handleCommand_DetachedInventory }, // 0x43
+	{ "TOCLIENT_SHOW_FORMSPEC",            TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ShowFormSpec }, // 0x44
+	{ "TOCLIENT_MOVEMENT",                 TOCLIENT_STATE_CONNECTED, &Client::handleCommand_Movement }, // 0x45
+	{ "TOCLIENT_SPAWN_PARTICLE",           TOCLIENT_STATE_CONNECTED, &Client::handleCommand_SpawnParticle }, // 0x46
+	{ "TOCLIENT_ADD_PARTICLESPAWNER",      TOCLIENT_STATE_CONNECTED, &Client::handleCommand_AddParticleSpawner }, // 0x47
+	{ "TOCLIENT_DELETE_PARTICLESPAWNER",   TOCLIENT_STATE_CONNECTED, &Client::handleCommand_DeleteParticleSpawner }, // 0x48
+	{ "TOCLIENT_HUDADD",                   TOCLIENT_STATE_CONNECTED, &Client::handleCommand_HudAdd }, // 0x49
+	{ "TOCLIENT_HUDRM",                    TOCLIENT_STATE_CONNECTED, &Client::handleCommand_HudRemove }, // 0x4a
+	{ "TOCLIENT_HUDCHANGE",                TOCLIENT_STATE_CONNECTED, &Client::handleCommand_HudChange }, // 0x4b
+	{ "TOCLIENT_HUD_SET_FLAGS",            TOCLIENT_STATE_CONNECTED, &Client::handleCommand_HudSetFlags }, // 0x4c
+	{ "TOCLIENT_HUD_SET_PARAM",            TOCLIENT_STATE_CONNECTED, &Client::handleCommand_HudSetParam }, // 0x4d
+	{ "TOCLIENT_BREATH",                   TOCLIENT_STATE_CONNECTED, &Client::handleCommand_Breath }, // 0x4e
+	{ "TOCLIENT_SET_SKY",                  TOCLIENT_STATE_CONNECTED, &Client::handleCommand_HudSetSky }, // 0x4f
+	{ "TOCLIENT_OVERRIDE_DAY_NIGHT_RATIO", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_OverrideDayNightRatio }, // 0x50
+	{ "TOCLIENT_LOCAL_PLAYER_ANIMATIONS",  TOCLIENT_STATE_CONNECTED, &Client::handleCommand_LocalPlayerAnimations }, // 0x51
+	{ "TOCLIENT_EYE_OFFSET",               TOCLIENT_STATE_CONNECTED, &Client::handleCommand_EyeOffset }, // 0x52
+};
diff --git a/src/network/clientopcodes.h b/src/network/clientopcodes.h
new file mode 100644
index 000000000..6755342a3
--- /dev/null
+++ b/src/network/clientopcodes.h
@@ -0,0 +1,43 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+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.
+*/
+
+#ifndef CLIENTOPCODES_HEADER
+#define CLIENTOPCODES_HEADER
+
+#include "client.h"
+#include "networkprotocol.h"
+#include "toclientpacket.h"
+
+enum ToClientConnectionState {
+	TOCLIENT_STATE_NOT_CONNECTED,
+	TOCLIENT_STATE_CONNECTED,
+	TOCLIENT_STATE_ALL,
+};
+
+struct ToClientCommandHandler
+{
+    char const* name;
+    ToClientConnectionState state;
+    void (Client::*handler)(ToClientPacket* pkt);
+};
+
+extern const ToClientCommandHandler toClientCommandTable[TOCLIENT_NUM_MSG_TYPES];
+
+#endif
diff --git a/src/network/networkpacket.cpp b/src/network/networkpacket.cpp
new file mode 100644
index 000000000..80ea830f9
--- /dev/null
+++ b/src/network/networkpacket.cpp
@@ -0,0 +1,301 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+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 "networkpacket.h"
+#include "debug.h"
+#include "util/serialize.h"
+
+NetworkPacket::NetworkPacket(u8 *data, u32 datasize, u16 peer_id):
+m_peer_id(peer_id)
+{
+	m_read_offset = 0;
+	m_datasize = datasize - 2;
+
+	// Copy data packet to remove opcode
+	m_data = new u8[m_datasize];
+
+	memcpy(m_data, &data[2], m_datasize);
+}
+
+NetworkPacket::~NetworkPacket()
+{
+	delete [] m_data;
+}
+
+char* NetworkPacket::getString(u32 from_offset)
+{
+	assert(from_offset < m_datasize);
+
+	return (char*)&m_data[from_offset];
+}
+
+char NetworkPacket::getChar(u32 offset)
+{
+	assert(offset < m_datasize);
+
+	return m_data[offset];
+}
+
+NetworkPacket& NetworkPacket::operator>>(std::string& dst)
+{
+	u16 strLen = readU16(&m_data[m_read_offset]);
+	m_read_offset += sizeof(u16);
+
+	dst.clear();
+
+	if (strLen == 0) {
+		return *this;
+	}
+
+
+	dst.reserve(strLen);
+	dst.append((char*)&m_data[m_read_offset], strLen);
+
+	m_read_offset += strLen*sizeof(char);
+	return *this;
+}
+
+NetworkPacket& NetworkPacket::operator>>(std::wstring& dst)
+{
+	u16 strLen = readU16(&m_data[m_read_offset]);
+	m_read_offset += sizeof(u16);
+
+	dst.clear();
+
+	if (strLen == 0) {
+		return *this;
+	}
+
+	dst.reserve(strLen);
+	for(u16 i=0; i<strLen; i++) {
+		wchar_t c16 = readU16(&m_data[m_read_offset]);
+		dst.append(&c16, 1);
+		m_read_offset += sizeof(u16);
+	}
+
+	return *this;
+}
+
+std::string NetworkPacket::readLongString()
+{
+	u32 strLen = readU32(&m_data[m_read_offset]);
+	m_read_offset += sizeof(u32);
+
+	if (strLen == 0) {
+		return "";
+	}
+
+	std::string dst;
+
+	dst.reserve(strLen);
+	dst.append((char*)&m_data[m_read_offset], strLen);
+
+	m_read_offset += strLen*sizeof(char);
+
+	return dst;
+}
+
+NetworkPacket& NetworkPacket::operator>>(char& dst)
+{
+	dst = getChar(m_read_offset);
+
+	m_read_offset += sizeof(char);
+	return *this;
+}
+
+u8* NetworkPacket::getU8Ptr(u32 from_offset)
+{
+	assert(from_offset < m_datasize);
+
+	return (u8*)&m_data[from_offset];
+}
+
+u8 NetworkPacket::getU8(u32 offset)
+{
+	assert(offset < m_datasize);
+
+	return m_data[offset];
+}
+
+NetworkPacket& NetworkPacket::operator>>(u8& dst)
+{
+	assert(m_read_offset < m_datasize);
+	dst = m_data[m_read_offset];
+
+	m_read_offset += sizeof(u8);
+	return *this;
+}
+
+NetworkPacket& NetworkPacket::operator>>(bool& dst)
+{
+	assert(m_read_offset < m_datasize);
+	dst = m_data[m_read_offset];
+
+	m_read_offset += sizeof(u8);
+	return *this;
+}
+
+u16 NetworkPacket::getU16(u32 from_offset)
+{
+	assert(from_offset < m_datasize);
+
+	return readU16(&m_data[from_offset]);
+}
+
+NetworkPacket& NetworkPacket::operator>>(u16& dst)
+{
+	dst = getU16(m_read_offset);
+
+	m_read_offset += sizeof(u16);
+	return *this;
+}
+
+u32 NetworkPacket::getU32(u32 from_offset)
+{
+	assert(from_offset < m_datasize);
+
+	return readU32(&m_data[from_offset]);
+}
+
+NetworkPacket& NetworkPacket::operator>>(u32& dst)
+{
+	dst = getU32(m_read_offset);
+
+	m_read_offset += sizeof(u32);
+	return *this;
+}
+
+u64 NetworkPacket::getU64(u32 from_offset)
+{
+	assert(from_offset < m_datasize);
+
+	return readU64(&m_data[from_offset]);
+}
+
+NetworkPacket& NetworkPacket::operator>>(u64& dst)
+{
+	dst = getU64(m_read_offset);
+
+	m_read_offset += sizeof(u64);
+	return *this;
+}
+
+float NetworkPacket::getF1000(u32 from_offset)
+{
+	assert(from_offset < m_datasize);
+
+	return readF1000(&m_data[from_offset]);
+}
+
+NetworkPacket& NetworkPacket::operator>>(float& dst)
+{
+	dst = getF1000(m_read_offset);
+
+	m_read_offset += sizeof(float);
+	return *this;
+}
+
+NetworkPacket& NetworkPacket::operator>>(v2f& dst)
+{
+	assert(m_read_offset < m_datasize);
+
+	dst = readV2F1000(&m_data[m_read_offset]);
+
+	m_read_offset += sizeof(v2f);
+	return *this;
+}
+
+NetworkPacket& NetworkPacket::operator>>(v3f& dst)
+{
+	assert(m_read_offset < m_datasize);
+
+	dst = readV3F1000(&m_data[m_read_offset]);
+
+	m_read_offset += sizeof(v3f);
+	return *this;
+}
+
+s16 NetworkPacket::getS16(u32 from_offset)
+{
+	assert(from_offset < m_datasize);
+
+	return readS16(&m_data[from_offset]);
+}
+
+NetworkPacket& NetworkPacket::operator>>(s16& dst)
+{
+	dst = getS16(m_read_offset);
+
+	m_read_offset += sizeof(s16);
+	return *this;
+}
+
+s32 NetworkPacket::getS32(u32 from_offset)
+{
+	assert(from_offset < m_datasize);
+
+	return readS32(&m_data[from_offset]);
+}
+
+NetworkPacket& NetworkPacket::operator>>(s32& dst)
+{
+	dst = getS32(m_read_offset);
+
+	m_read_offset += sizeof(s32);
+	return *this;
+}
+
+NetworkPacket& NetworkPacket::operator>>(v2s32& dst)
+{
+	dst = readV2S32(&m_data[m_read_offset]);
+
+	m_read_offset += sizeof(v2s32);
+	return *this;
+}
+
+v3s16 NetworkPacket::getV3S16(u32 from_offset)
+{
+	assert(from_offset < m_datasize);
+
+	return readV3S16(&m_data[from_offset]);
+}
+
+NetworkPacket& NetworkPacket::operator>>(v3s16& dst)
+{
+	dst = getV3S16(m_read_offset);
+
+	m_read_offset += sizeof(v3s16);
+	return *this;
+}
+
+v3s32 NetworkPacket::getV3S32(u32 from_offset)
+{
+	assert(from_offset < m_datasize);
+
+	return readV3S32(&m_data[from_offset]);
+}
+
+NetworkPacket& NetworkPacket::operator>>(v3s32& dst)
+{
+	dst = getV3S32(m_read_offset);
+
+	m_read_offset += sizeof(v3s32);
+	return *this;
+}
diff --git a/src/network/networkpacket.h b/src/network/networkpacket.h
new file mode 100644
index 000000000..c9f7e3cde
--- /dev/null
+++ b/src/network/networkpacket.h
@@ -0,0 +1,86 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+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.
+*/
+
+#ifndef NETWORKPACKET_HEADER
+#define NETWORKPACKET_HEADER
+
+#include "util/numeric.h"
+#include "networkprotocol.h"
+
+class NetworkPacket
+{
+
+public:
+		NetworkPacket(u8 *data, u32 datasize, u16 peer_id);
+		~NetworkPacket();
+
+		// Getters
+		u32 getSize() { return m_datasize; }
+		u16 getPeerId() { return m_peer_id; }
+
+		// Data extractors
+		char* getString(u32 from_offset);
+		NetworkPacket& operator>>(std::string& dst);
+		NetworkPacket& operator>>(std::wstring& dst);
+		std::string readLongString();
+
+		char getChar(u32 offset);
+		NetworkPacket& operator>>(char& dst);
+
+		NetworkPacket& operator>>(bool& dst);
+
+		u8 getU8(u32 offset);
+		NetworkPacket& operator>>(u8& dst);
+
+		u8* getU8Ptr(u32 offset);
+		u16 getU16(u32 from_offset);
+		NetworkPacket& operator>>(u16& dst);
+		u32 getU32(u32 from_offset);
+		NetworkPacket& operator>>(u32& dst);
+		u64 getU64(u32 from_offset);
+		NetworkPacket& operator>>(u64& dst);
+
+		float getF1000(u32 offset);
+		NetworkPacket& operator>>(float& dst);
+		NetworkPacket& operator>>(v2f& dst);
+		NetworkPacket& operator>>(v3f& dst);
+
+		s16 getS16(u32 from_offset);
+		NetworkPacket& operator>>(s16& dst);
+		s32 getS32(u32 from_offset);
+		NetworkPacket& operator>>(s32& dst);
+
+		NetworkPacket& operator>>(v2s32& dst);
+
+		v3s16 getV3S16(u32 from_offset);
+		NetworkPacket& operator>>(v3s16& dst);
+
+		v3s32 getV3S32(u32 from_offset);
+		NetworkPacket& operator>>(v3s32& dst);
+
+protected:
+		u8 *m_data;
+		u32 m_datasize;
+		u32 m_read_offset;
+private:
+		u16 m_peer_id;
+};
+
+#endif
diff --git a/src/network/networkprotocol.h b/src/network/networkprotocol.h
new file mode 100644
index 000000000..c774c02e2
--- /dev/null
+++ b/src/network/networkprotocol.h
@@ -0,0 +1,804 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+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.
+*/
+
+#ifndef NETWORKPROTOCOL_HEADER
+#define NETWORKPROTOCOL_HEADER
+#include "util/string.h"
+
+/*
+	changes by PROTOCOL_VERSION:
+
+	PROTOCOL_VERSION 3:
+		Base for writing changes here
+	PROTOCOL_VERSION 4:
+		Add TOCLIENT_MEDIA
+		Add TOCLIENT_TOOLDEF
+		Add TOCLIENT_NODEDEF
+		Add TOCLIENT_CRAFTITEMDEF
+		Add TOSERVER_INTERACT
+		Obsolete TOSERVER_CLICK_ACTIVEOBJECT
+		Obsolete TOSERVER_GROUND_ACTION
+	PROTOCOL_VERSION 5:
+		Make players to be handled mostly as ActiveObjects
+	PROTOCOL_VERSION 6:
+		Only non-cached textures are sent
+	PROTOCOL_VERSION 7:
+		Add TOCLIENT_ITEMDEF
+		Obsolete TOCLIENT_TOOLDEF
+		Obsolete TOCLIENT_CRAFTITEMDEF
+		Compress the contents of TOCLIENT_ITEMDEF and TOCLIENT_NODEDEF
+	PROTOCOL_VERSION 8:
+		Digging based on item groups
+		Many things
+	PROTOCOL_VERSION 9:
+		ContentFeatures and NodeDefManager use a different serialization
+		    format; better for future version cross-compatibility
+		Many things
+	PROTOCOL_VERSION 10:
+		TOCLIENT_PRIVILEGES
+		Version raised to force 'fly' and 'fast' privileges into effect.
+		Node metadata change (came in later; somewhat incompatible)
+	PROTOCOL_VERSION 11:
+		TileDef in ContentFeatures
+		Nodebox drawtype
+		(some dev snapshot)
+		TOCLIENT_INVENTORY_FORMSPEC
+		(0.4.0, 0.4.1)
+	PROTOCOL_VERSION 12:
+		TOSERVER_INVENTORY_FIELDS
+		16-bit node ids
+		TOCLIENT_DETACHED_INVENTORY
+	PROTOCOL_VERSION 13:
+		InventoryList field "Width" (deserialization fails with old versions)
+	PROTOCOL_VERSION 14:
+		Added transfer of player pressed keys to the server
+		Added new messages for mesh and bone animation, as well as attachments
+		GENERIC_CMD_SET_ANIMATION
+		GENERIC_CMD_SET_BONE_POSITION
+		GENERIC_CMD_SET_ATTACHMENT
+	PROTOCOL_VERSION 15:
+		Serialization format changes
+	PROTOCOL_VERSION 16:
+		TOCLIENT_SHOW_FORMSPEC
+	PROTOCOL_VERSION 17:
+		Serialization format change: include backface_culling flag in TileDef
+		Added rightclickable field in nodedef
+		TOCLIENT_SPAWN_PARTICLE
+		TOCLIENT_ADD_PARTICLESPAWNER
+		TOCLIENT_DELETE_PARTICLESPAWNER
+	PROTOCOL_VERSION 18:
+		damageGroups added to ToolCapabilities
+		sound_place added to ItemDefinition
+	PROTOCOL_VERSION 19:
+		GENERIC_CMD_SET_PHYSICS_OVERRIDE
+	PROTOCOL_VERSION 20:
+		TOCLIENT_HUDADD
+		TOCLIENT_HUDRM
+		TOCLIENT_HUDCHANGE
+		TOCLIENT_HUD_SET_FLAGS
+	PROTOCOL_VERSION 21:
+		TOCLIENT_BREATH
+		TOSERVER_BREATH
+		range added to ItemDefinition
+		drowning, leveled and liquid_range added to ContentFeatures
+		stepheight and collideWithObjects added to object properties
+		version, heat and humidity transfer in MapBock
+		automatic_face_movement_dir and automatic_face_movement_dir_offset
+			added to object properties
+	PROTOCOL_VERSION 22:
+		add swap_node
+	PROTOCOL_VERSION 23:
+		TOSERVER_CLIENT_READY
+	PROTOCOL_VERSION 24:
+		ContentFeatures version 7
+		ContentFeatures: change number of special tiles to 6 (CF_SPECIAL_COUNT)
+*/
+
+#define LATEST_PROTOCOL_VERSION 24
+
+// Server's supported network protocol range
+#define SERVER_PROTOCOL_VERSION_MIN 13
+#define SERVER_PROTOCOL_VERSION_MAX LATEST_PROTOCOL_VERSION
+
+// Client's supported network protocol range
+#define CLIENT_PROTOCOL_VERSION_MIN 13
+#define CLIENT_PROTOCOL_VERSION_MAX LATEST_PROTOCOL_VERSION
+
+// Constant that differentiates the protocol from random data and other protocols
+#define PROTOCOL_ID 0x4f457403
+
+#define PASSWORD_SIZE 28       // Maximum password length. Allows for
+                               // base64-encoded SHA-1 (27+\0).
+
+#define FORMSPEC_API_VERSION 1
+#define FORMSPEC_VERSION_STRING "formspec_version[" TOSTRING(FORMSPEC_API_VERSION) "]"
+
+#define TEXTURENAME_ALLOWED_CHARS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_.-"
+
+enum ToClientCommand
+{
+	TOCLIENT_INIT = 0x10,
+	/*
+		Server's reply to TOSERVER_INIT.
+		Sent second after connected.
+
+		[0] u16 TOSERVER_INIT
+		[2] u8 deployed version
+		[3] v3s16 player's position + v3f(0,BS/2,0) floatToInt'd
+		[12] u64 map seed (new as of 2011-02-27)
+		[20] f1000 recommended send interval (in seconds) (new as of 14)
+
+		NOTE: The position in here is deprecated; position is
+		      explicitly sent afterwards
+	*/
+
+	TOCLIENT_BLOCKDATA = 0x20, //TODO: Multiple blocks
+	TOCLIENT_ADDNODE = 0x21,
+	/*
+		u16 command
+		v3s16 position
+		serialized mapnode
+		u8 keep_metadata // Added in protocol version 22
+	*/
+	TOCLIENT_REMOVENODE = 0x22,
+
+	TOCLIENT_PLAYERPOS = 0x23, // Obsolete
+	/*
+		[0] u16 command
+		// Followed by an arbitary number of these:
+		// Number is determined from packet length.
+		[N] u16 peer_id
+		[N+2] v3s32 position*100
+		[N+2+12] v3s32 speed*100
+		[N+2+12+12] s32 pitch*100
+		[N+2+12+12+4] s32 yaw*100
+	*/
+
+	TOCLIENT_PLAYERINFO = 0x24, // Obsolete
+	/*
+		[0] u16 command
+		// Followed by an arbitary number of these:
+		// Number is determined from packet length.
+		[N] u16 peer_id
+		[N] char[20] name
+	*/
+
+	TOCLIENT_OPT_BLOCK_NOT_FOUND = 0x25, // Obsolete
+
+	TOCLIENT_SECTORMETA = 0x26, // Obsolete
+	/*
+		[0] u16 command
+		[2] u8 sector count
+		[3...] v2s16 pos + sector metadata
+	*/
+
+	TOCLIENT_INVENTORY = 0x27,
+	/*
+		[0] u16 command
+		[2] serialized inventory
+	*/
+
+	TOCLIENT_OBJECTDATA = 0x28, // Obsolete
+	/*
+		Sent as unreliable.
+
+		u16 command
+		u16 number of player positions
+		for each player:
+			u16 peer_id
+			v3s32 position*100
+			v3s32 speed*100
+			s32 pitch*100
+			s32 yaw*100
+		u16 count of blocks
+		for each block:
+			v3s16 blockpos
+			block objects
+	*/
+
+	TOCLIENT_TIME_OF_DAY = 0x29,
+	/*
+		u16 command
+		u16 time (0-23999)
+		Added in a later version:
+		f1000 time_speed
+	*/
+
+	// (oops, there is some gap here)
+
+	TOCLIENT_CHAT_MESSAGE = 0x30,
+	/*
+		u16 command
+		u16 length
+		wstring message
+	*/
+
+	TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD = 0x31,
+	/*
+		u16 command
+		u16 count of removed objects
+		for all removed objects {
+			u16 id
+		}
+		u16 count of added objects
+		for all added objects {
+			u16 id
+			u8 type
+			u32 initialization data length
+			string initialization data
+		}
+	*/
+
+	TOCLIENT_ACTIVE_OBJECT_MESSAGES = 0x32,
+	/*
+		u16 command
+		for all objects
+		{
+			u16 id
+			u16 message length
+			string message
+		}
+	*/
+
+	TOCLIENT_HP = 0x33,
+	/*
+		u16 command
+		u8 hp
+	*/
+
+	TOCLIENT_MOVE_PLAYER = 0x34,
+	/*
+		u16 command
+		v3f1000 player position
+		f1000 player pitch
+		f1000 player yaw
+	*/
+
+	TOCLIENT_ACCESS_DENIED = 0x35,
+	/*
+		u16 command
+		u16 reason_length
+		wstring reason
+	*/
+
+	TOCLIENT_PLAYERITEM = 0x36, // Obsolete
+	/*
+		u16 command
+		u16 count of player items
+		for all player items {
+			u16 peer id
+			u16 length of serialized item
+			string serialized item
+		}
+	*/
+
+	TOCLIENT_DEATHSCREEN = 0x37,
+	/*
+		u16 command
+		u8 bool set camera point target
+		v3f1000 camera point target (to point the death cause or whatever)
+	*/
+
+	TOCLIENT_MEDIA = 0x38,
+	/*
+		u16 command
+		u16 total number of texture bunches
+		u16 index of this bunch
+		u32 number of files in this bunch
+		for each file {
+			u16 length of name
+			string name
+			u32 length of data
+			data
+		}
+		u16 length of remote media server url (if applicable)
+		string url
+	*/
+
+	TOCLIENT_TOOLDEF = 0x39,
+	/*
+		u16 command
+		u32 length of the next item
+		serialized ToolDefManager
+	*/
+
+	TOCLIENT_NODEDEF = 0x3a,
+	/*
+		u16 command
+		u32 length of the next item
+		serialized NodeDefManager
+	*/
+
+	TOCLIENT_CRAFTITEMDEF = 0x3b,
+	/*
+		u16 command
+		u32 length of the next item
+		serialized CraftiItemDefManager
+	*/
+
+	TOCLIENT_ANNOUNCE_MEDIA = 0x3c,
+
+	/*
+		u16 command
+		u32 number of files
+		for each texture {
+			u16 length of name
+			string name
+			u16 length of sha1_digest
+			string sha1_digest
+		}
+	*/
+
+	TOCLIENT_ITEMDEF = 0x3d,
+	/*
+		u16 command
+		u32 length of next item
+		serialized ItemDefManager
+	*/
+
+	TOCLIENT_PLAY_SOUND = 0x3f,
+	/*
+		u16 command
+		s32 sound_id
+		u16 len
+		u8[len] sound name
+		s32 gain*1000
+		u8 type (0=local, 1=positional, 2=object)
+		s32[3] pos_nodes*10000
+		u16 object_id
+		u8 loop (bool)
+	*/
+
+	TOCLIENT_STOP_SOUND = 0x40,
+	/*
+		u16 command
+		s32 sound_id
+	*/
+
+	TOCLIENT_PRIVILEGES = 0x41,
+	/*
+		u16 command
+		u16 number of privileges
+		for each privilege
+			u16 len
+			u8[len] privilege
+	*/
+
+	TOCLIENT_INVENTORY_FORMSPEC = 0x42,
+	/*
+		u16 command
+		u32 len
+		u8[len] formspec
+	*/
+
+	TOCLIENT_DETACHED_INVENTORY = 0x43,
+	/*
+		[0] u16 command
+		u16 len
+		u8[len] name
+		[2] serialized inventory
+	*/
+
+	TOCLIENT_SHOW_FORMSPEC = 0x44,
+	/*
+		[0] u16 command
+		u32 len
+		u8[len] formspec
+		u16 len
+		u8[len] formname
+	*/
+
+	TOCLIENT_MOVEMENT = 0x45,
+	/*
+		u16 command
+		f1000 movement_acceleration_default
+		f1000 movement_acceleration_air
+		f1000 movement_acceleration_fast
+		f1000 movement_speed_walk
+		f1000 movement_speed_crouch
+		f1000 movement_speed_fast
+		f1000 movement_speed_climb
+		f1000 movement_speed_jump
+		f1000 movement_liquid_fluidity
+		f1000 movement_liquid_fluidity_smooth
+		f1000 movement_liquid_sink
+		f1000 movement_gravity
+	*/
+
+	TOCLIENT_SPAWN_PARTICLE = 0x46,
+	/*
+		u16 command
+		v3f1000 pos
+		v3f1000 velocity
+		v3f1000 acceleration
+		f1000 expirationtime
+		f1000 size
+		u8 bool collisiondetection
+		u8 bool vertical
+		u32 len
+		u8[len] texture
+	*/
+
+	TOCLIENT_ADD_PARTICLESPAWNER = 0x47,
+	/*
+		u16 command
+		u16 amount
+		f1000 spawntime
+		v3f1000 minpos
+		v3f1000 maxpos
+		v3f1000 minvel
+		v3f1000 maxvel
+		v3f1000 minacc
+		v3f1000 maxacc
+		f1000 minexptime
+		f1000 maxexptime
+		f1000 minsize
+		f1000 maxsize
+		u8 bool collisiondetection
+		u8 bool vertical
+		u32 len
+		u8[len] texture
+		u32 id
+	*/
+
+	TOCLIENT_DELETE_PARTICLESPAWNER = 0x48,
+	/*
+		u16 command
+		u32 id
+	*/
+
+	TOCLIENT_HUDADD = 0x49,
+	/*
+		u16 command
+		u32 id
+		u8 type
+		v2f1000 pos
+		u32 len
+		u8[len] name
+		v2f1000 scale
+		u32 len2
+		u8[len2] text
+		u32 number
+		u32 item
+		u32 dir
+		v2f1000 align
+		v2f1000 offset
+		v3f1000 world_pos
+		v2s32 size
+	*/
+
+	TOCLIENT_HUDRM = 0x4a,
+	/*
+		u16 command
+		u32 id
+	*/
+
+	TOCLIENT_HUDCHANGE = 0x4b,
+	/*
+		u16 command
+		u32 id
+		u8 stat
+		[v2f1000 data |
+		 u32 len
+		 u8[len] data |
+		 u32 data]
+	*/
+
+	TOCLIENT_HUD_SET_FLAGS = 0x4c,
+	/*
+		u16 command
+		u32 flags
+		u32 mask
+	*/
+
+	TOCLIENT_HUD_SET_PARAM = 0x4d,
+	/*
+		u16 command
+		u16 param
+		u16 len
+		u8[len] value
+	*/
+
+	TOCLIENT_BREATH = 0x4e,
+	/*
+		u16 command
+		u16 breath
+	*/
+
+	TOCLIENT_SET_SKY = 0x4f,
+	/*
+		u16 command
+		u8[4] color (ARGB)
+		u8 len
+		u8[len] type
+		u16 count
+		foreach count:
+			u8 len
+			u8[len] param
+	*/
+
+	TOCLIENT_OVERRIDE_DAY_NIGHT_RATIO = 0x50,
+	/*
+		u16 command
+		u8 do_override (boolean)
+		u16 day-night ratio 0...65535
+	*/
+
+	TOCLIENT_LOCAL_PLAYER_ANIMATIONS = 0x51,
+	/*
+		u16 command
+		v2s32 stand/idle
+		v2s32 walk
+		v2s32 dig
+		v2s32 walk+dig
+		f1000 frame_speed
+	*/
+
+	TOCLIENT_EYE_OFFSET = 0x52,
+	/*
+		u16 command
+		v3f1000 first
+		v3f1000 third
+	*/
+
+	TOCLIENT_NUM_MSG_TYPES = 0x53,
+};
+
+enum ToServerCommand
+{
+	TOSERVER_INIT=0x10,
+	/*
+		Sent first after connected.
+
+		[0] u16 TOSERVER_INIT
+		[2] u8 SER_FMT_VER_HIGHEST_READ
+		[3] u8[20] player_name
+		[23] u8[28] password (new in some version)
+		[51] u16 minimum supported network protocol version (added sometime)
+		[53] u16 maximum supported network protocol version (added later than the previous one)
+	*/
+
+	TOSERVER_INIT2 = 0x11,
+	/*
+		Sent as an ACK for TOCLIENT_INIT.
+		After this, the server can send data.
+
+		[0] u16 TOSERVER_INIT2
+	*/
+
+	TOSERVER_GETBLOCK=0x20, // Obsolete
+	TOSERVER_ADDNODE = 0x21, // Obsolete
+	TOSERVER_REMOVENODE = 0x22, // Obsolete
+
+	TOSERVER_PLAYERPOS = 0x23,
+	/*
+		[0] u16 command
+		[2] v3s32 position*100
+		[2+12] v3s32 speed*100
+		[2+12+12] s32 pitch*100
+		[2+12+12+4] s32 yaw*100
+		[2+12+12+4+4] u32 keyPressed
+	*/
+
+	TOSERVER_GOTBLOCKS = 0x24,
+	/*
+		[0] u16 command
+		[2] u8 count
+		[3] v3s16 pos_0
+		[3+6] v3s16 pos_1
+		...
+	*/
+
+	TOSERVER_DELETEDBLOCKS = 0x25,
+	/*
+		[0] u16 command
+		[2] u8 count
+		[3] v3s16 pos_0
+		[3+6] v3s16 pos_1
+		...
+	*/
+
+	TOSERVER_ADDNODE_FROM_INVENTORY = 0x26, // Obsolete
+	/*
+		[0] u16 command
+		[2] v3s16 pos
+		[8] u16 i
+	*/
+
+	TOSERVER_CLICK_OBJECT = 0x27, // Obsolete
+	/*
+		length: 13
+		[0] u16 command
+		[2] u8 button (0=left, 1=right)
+		[3] v3s16 blockpos
+		[9] s16 id
+		[11] u16 item
+	*/
+
+	TOSERVER_GROUND_ACTION = 0x28, // Obsolete
+	/*
+		length: 17
+		[0] u16 command
+		[2] u8 action
+		[3] v3s16 nodepos_undersurface
+		[9] v3s16 nodepos_abovesurface
+		[15] u16 item
+		actions:
+		0: start digging (from undersurface)
+		1: place block (to abovesurface)
+		2: stop digging (all parameters ignored)
+		3: digging completed
+	*/
+
+	TOSERVER_RELEASE = 0x29, // Obsolete
+
+	// (oops, there is some gap here)
+
+	TOSERVER_SIGNTEXT = 0x30, // Old signs, obsolete
+	/*
+		u16 command
+		v3s16 blockpos
+		s16 id
+		u16 textlen
+		textdata
+	*/
+
+	TOSERVER_INVENTORY_ACTION = 0x31,
+	/*
+		See InventoryAction in inventory.h
+	*/
+
+	TOSERVER_CHAT_MESSAGE = 0x32,
+	/*
+		u16 command
+		u16 length
+		wstring message
+	*/
+
+	TOSERVER_SIGNNODETEXT = 0x33, // obsolete
+	/*
+		u16 command
+		v3s16 p
+		u16 textlen
+		textdata
+	*/
+
+	TOSERVER_CLICK_ACTIVEOBJECT = 0x34, // Obsolete
+	/*
+		length: 7
+		[0] u16 command
+		[2] u8 button (0=left, 1=right)
+		[3] u16 id
+		[5] u16 item
+	*/
+
+	TOSERVER_DAMAGE = 0x35,
+	/*
+		u16 command
+		u8 amount
+	*/
+
+	TOSERVER_PASSWORD=0x36,
+	/*
+		Sent to change password.
+
+		[0] u16 TOSERVER_PASSWORD
+		[2] u8[28] old password
+		[30] u8[28] new password
+	*/
+
+	TOSERVER_PLAYERITEM=0x37,
+	/*
+		Sent to change selected item.
+
+		[0] u16 TOSERVER_PLAYERITEM
+		[2] u16 item
+	*/
+
+	TOSERVER_RESPAWN=0x38,
+	/*
+		u16 TOSERVER_RESPAWN
+	*/
+
+	TOSERVER_INTERACT = 0x39,
+	/*
+		[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
+
+		(Obsoletes TOSERVER_GROUND_ACTION and TOSERVER_CLICK_ACTIVEOBJECT.)
+	*/
+
+	TOSERVER_REMOVED_SOUNDS = 0x3a,
+	/*
+		u16 command
+		u16 len
+		s32[len] sound_id
+	*/
+
+	TOSERVER_NODEMETA_FIELDS = 0x3b,
+	/*
+		u16 command
+		v3s16 p
+		u16 len
+		u8[len] form name (reserved for future use)
+		u16 number of fields
+		for each field:
+			u16 len
+			u8[len] field name
+			u32 len
+			u8[len] field value
+	*/
+
+	TOSERVER_INVENTORY_FIELDS = 0x3c,
+	/*
+		u16 command
+		u16 len
+		u8[len] form name (reserved for future use)
+		u16 number of fields
+		for each field:
+			u16 len
+			u8[len] field name
+			u32 len
+			u8[len] field value
+	*/
+
+	TOSERVER_REQUEST_MEDIA = 0x40,
+	/*
+		u16 command
+		u16 number of files requested
+		for each file {
+			u16 length of name
+			string name
+		}
+	 */
+
+	TOSERVER_RECEIVED_MEDIA = 0x41,
+	/*
+		u16 command
+	*/
+
+	TOSERVER_BREATH = 0x42,
+	/*
+		u16 command
+		u16 breath
+	*/
+
+	TOSERVER_CLIENT_READY = 0x43,
+	/*
+		u8 major
+		u8 minor
+		u8 patch
+		u8 reserved
+		u16 len
+		u8[len] full_version_string
+	*/
+
+	TOSERVER_NUM_MSG_TYPES = 0x44,
+};
+
+#endif
diff --git a/src/network/serveropcodes.cpp b/src/network/serveropcodes.cpp
new file mode 100644
index 000000000..11d2c65ea
--- /dev/null
+++ b/src/network/serveropcodes.cpp
@@ -0,0 +1,95 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+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 "serveropcodes.h"
+
+const static ToServerCommandHandler null_command_handler = { "TOSERVER_NULL", TOSERVER_STATE_ALL, &Server::handleCommand_Null };
+
+const ToServerCommandHandler toServerCommandTable[TOSERVER_NUM_MSG_TYPES] =
+{
+	null_command_handler, // 0x00
+	null_command_handler, // 0x01
+	null_command_handler, // 0x02
+	null_command_handler, // 0x03
+	null_command_handler, // 0x04
+	null_command_handler, // 0x05
+	null_command_handler, // 0x06
+	null_command_handler, // 0x07
+	null_command_handler, // 0x08
+	null_command_handler, // 0x09
+	null_command_handler, // 0x0a
+	null_command_handler, // 0x0b
+	null_command_handler, // 0x0c
+	null_command_handler, // 0x0d
+	null_command_handler, // 0x0e
+	null_command_handler, // 0x0f
+	{ "TOSERVER_INIT",                     TOSERVER_STATE_NOT_CONNECTED, &Server::handleCommand_Init }, // 0x10
+	{ "TOSERVER_INIT2",                    TOSERVER_STATE_NOT_CONNECTED, &Server::handleCommand_Init2 }, // 0x11
+	null_command_handler, // 0x12
+	null_command_handler, // 0x13
+	null_command_handler, // 0x14
+	null_command_handler, // 0x15
+	null_command_handler, // 0x16
+	null_command_handler, // 0x17
+	null_command_handler, // 0x18
+	null_command_handler, // 0x19
+	null_command_handler, // 0x1a
+	null_command_handler, // 0x1b
+	null_command_handler, // 0x1c
+	null_command_handler, // 0x1d
+	null_command_handler, // 0x1e
+	null_command_handler, // 0x1f
+	null_command_handler, // 0x20
+	null_command_handler, // 0x21
+	null_command_handler, // 0x22
+	{ "TOSERVER_PLAYERPOS",                TOSERVER_STATE_INGAME, &Server::handleCommand_PlayerPos }, // 0x23
+	{ "TOSERVER_GOTBLOCKS",                TOSERVER_STATE_STARTUP, &Server::handleCommand_GotBlocks }, // 0x24
+	{ "TOSERVER_DELETEDBLOCKS",            TOSERVER_STATE_INGAME, &Server::handleCommand_DeletedBlocks }, // 0x25
+	null_command_handler, // 0x26
+	{ "TOSERVER_CLICK_OBJECT",             TOSERVER_STATE_INGAME, &Server::handleCommand_Deprecated }, // 0x27
+	{ "TOSERVER_GROUND_ACTION",            TOSERVER_STATE_INGAME, &Server::handleCommand_Deprecated }, // 0x28
+	{ "TOSERVER_RELEASE",                  TOSERVER_STATE_INGAME, &Server::handleCommand_Deprecated }, // 0x29
+	null_command_handler, // 0x2a
+	null_command_handler, // 0x2b
+	null_command_handler, // 0x2c
+	null_command_handler, // 0x2d
+	null_command_handler, // 0x2e
+	null_command_handler, // 0x2f
+	{ "TOSERVER_SIGNTEXT",                 TOSERVER_STATE_INGAME, &Server::handleCommand_Deprecated }, // 0x30
+	{ "TOSERVER_INVENTORY_ACTION",         TOSERVER_STATE_INGAME, &Server::handleCommand_InventoryAction }, // 0x31
+	{ "TOSERVER_CHAT_MESSAGE",             TOSERVER_STATE_INGAME, &Server::handleCommand_ChatMessage }, // 0x32
+	{ "TOSERVER_SIGNNODETEXT",             TOSERVER_STATE_INGAME, &Server::handleCommand_Deprecated }, // 0x33
+	{ "TOSERVER_CLICK_ACTIVEOBJECT",       TOSERVER_STATE_INGAME, &Server::handleCommand_Deprecated }, // 0x34
+	{ "TOSERVER_DAMAGE",                   TOSERVER_STATE_INGAME, &Server::handleCommand_Damage }, // 0x35
+	{ "TOSERVER_PASSWORD",                 TOSERVER_STATE_INGAME, &Server::handleCommand_Password }, // 0x36
+	{ "TOSERVER_PLAYERITEM",               TOSERVER_STATE_INGAME, &Server::handleCommand_PlayerItem }, // 0x37
+	{ "TOSERVER_RESPAWN",                  TOSERVER_STATE_INGAME, &Server::handleCommand_Respawn }, // 0x38
+	{ "TOSERVER_INTERACT",                 TOSERVER_STATE_INGAME, &Server::handleCommand_Interact }, // 0x39
+	{ "TOSERVER_REMOVED_SOUNDS",           TOSERVER_STATE_INGAME, &Server::handleCommand_RemovedSounds }, // 0x3a
+	{ "TOSERVER_NODEMETA_FIELDS",          TOSERVER_STATE_INGAME, &Server::handleCommand_NodeMetaFields }, // 0x3b
+	{ "TOSERVER_INVENTORY_FIELDS",         TOSERVER_STATE_INGAME, &Server::handleCommand_InventoryFields }, // 0x3c
+	null_command_handler, // 0x3d
+	null_command_handler, // 0x3e
+	null_command_handler, // 0x3f
+	{ "TOSERVER_REQUEST_MEDIA",            TOSERVER_STATE_STARTUP, &Server::handleCommand_RequestMedia }, // 0x40
+	{ "TOSERVER_RECEIVED_MEDIA",           TOSERVER_STATE_STARTUP, &Server::handleCommand_ReceivedMedia }, // 0x41
+	{ "TOSERVER_BREATH",                   TOSERVER_STATE_INGAME, &Server::handleCommand_Breath }, // 0x42
+	{ "TOSERVER_CLIENT_READY",             TOSERVER_STATE_STARTUP, &Server::handleCommand_ClientReady }, // 0x43
+};
diff --git a/src/network/serveropcodes.h b/src/network/serveropcodes.h
new file mode 100644
index 000000000..77f39e09a
--- /dev/null
+++ b/src/network/serveropcodes.h
@@ -0,0 +1,43 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+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.
+*/
+
+#ifndef SERVEROPCODES_HEADER
+#define SERVEROPCODES_HEADER
+
+#include "server.h"
+#include "networkprotocol.h"
+#include "toserverpacket.h"
+
+enum ToServerConnectionState {
+	TOSERVER_STATE_NOT_CONNECTED,
+	TOSERVER_STATE_STARTUP,
+	TOSERVER_STATE_INGAME,
+	TOSERVER_STATE_ALL,
+};
+struct ToServerCommandHandler
+{
+    const std::string name;
+    ToServerConnectionState state;
+    void (Server::*handler)(ToServerPacket* pkt);
+};
+
+extern const ToServerCommandHandler toServerCommandTable[TOSERVER_NUM_MSG_TYPES];
+
+#endif
diff --git a/src/network/toclientpacket.cpp b/src/network/toclientpacket.cpp
new file mode 100644
index 000000000..b51da48cf
--- /dev/null
+++ b/src/network/toclientpacket.cpp
@@ -0,0 +1,28 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+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 "toclientpacket.h"
+#include "util/serialize.h"
+
+ToClientPacket::ToClientPacket(u8 *data, u32 datasize, u16 peer_id):
+NetworkPacket(data, datasize, peer_id)
+{
+	m_command = (ToClientCommand)readU16(&data[0]);
+}
diff --git a/src/network/toclientpacket.h b/src/network/toclientpacket.h
new file mode 100644
index 000000000..b926514fb
--- /dev/null
+++ b/src/network/toclientpacket.h
@@ -0,0 +1,38 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+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.
+*/
+
+#ifndef TOCLIENTPACKET_HEADER
+#define TOCLIENTPACKET_HEADER
+
+#include "util/numeric.h"
+#include "networkprotocol.h"
+#include "networkpacket.h"
+
+class ToClientPacket: public NetworkPacket
+{
+public:
+	ToClientPacket(u8 *data, u32 datasize, u16 peer_id);
+	ToClientCommand getCommand() { return m_command; }
+
+private:
+	ToClientCommand m_command;
+};
+
+#endif
diff --git a/src/network/toserverpacket.cpp b/src/network/toserverpacket.cpp
new file mode 100644
index 000000000..7b4968679
--- /dev/null
+++ b/src/network/toserverpacket.cpp
@@ -0,0 +1,28 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+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 "toserverpacket.h"
+#include "util/serialize.h"
+
+ToServerPacket::ToServerPacket(u8 *data, u32 datasize, u16 peer_id):
+NetworkPacket(data, datasize, peer_id)
+{
+	m_command = (ToServerCommand)readU16(&data[0]);
+}
diff --git a/src/network/toserverpacket.h b/src/network/toserverpacket.h
new file mode 100644
index 000000000..eb8470b07
--- /dev/null
+++ b/src/network/toserverpacket.h
@@ -0,0 +1,38 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+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.
+*/
+
+#ifndef TOSERVERPACKET_HEADER
+#define TOSERVERPACKET_HEADER
+
+#include "util/numeric.h"
+#include "networkprotocol.h"
+#include "networkpacket.h"
+
+class ToServerPacket: public NetworkPacket
+{
+public:
+	ToServerPacket(u8 *data, u32 datasize, u16 peer_id);
+	ToServerCommand getCommand() { return m_command; }
+
+private:
+	ToServerCommand m_command;
+};
+
+#endif