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

1 files changed, 95 insertions, 0 deletions

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
+};