mirror of
https://github.com/minetest/minetest.git
synced 2024-12-29 01:17:30 +01:00
2b3490db1f
This can prevent untrusted data, such as sent over the network, from consuming all memory with a specially crafted payload.
96 lines
3.4 KiB
C++
96 lines
3.4 KiB
C++
/*
|
|
Minetest
|
|
Copyright (C) 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "irrlichttypes.h"
|
|
#include "exceptions.h"
|
|
#include <iostream>
|
|
#include "util/pointer.h"
|
|
|
|
/*
|
|
Map format serialization version
|
|
--------------------------------
|
|
|
|
For map data (blocks, nodes, sectors).
|
|
|
|
NOTE: The goal is to increment this so that saved maps will be
|
|
loadable by any version. Other compatibility is not
|
|
maintained.
|
|
|
|
0: original networked test with 1-byte nodes
|
|
1: update with 2-byte nodes
|
|
2: lighting is transmitted in param
|
|
3: optional fetching of far blocks
|
|
4: block compression
|
|
5: sector objects NOTE: block compression was left accidentally out
|
|
6: failed attempt at switching block compression on again
|
|
7: block compression switched on again
|
|
8: server-initiated block transfers and all kinds of stuff
|
|
9: block objects
|
|
10: water pressure
|
|
11: zlib'd blocks, block flags
|
|
12: UnlimitedHeightmap now uses interpolated areas
|
|
13: Mapgen v2
|
|
14: NodeMetadata
|
|
15: StaticObjects
|
|
16: larger maximum size of node metadata, and compression
|
|
17: MapBlocks contain timestamp
|
|
18: new generator (not really necessary, but it's there)
|
|
19: new content type handling
|
|
20: many existing content types translated to extended ones
|
|
21: dynamic content type allocation
|
|
22: minerals removed, facedir & wallmounted changed
|
|
23: new node metadata format
|
|
24: 16-bit node ids and node timers (never released as stable)
|
|
25: Improved node timer format
|
|
26: Never written; read the same as 25
|
|
27: Added light spreading flags to blocks
|
|
28: Added "private" flag to NodeMetadata
|
|
*/
|
|
// This represents an uninitialized or invalid format
|
|
#define SER_FMT_VER_INVALID 255
|
|
// Highest supported serialization version
|
|
#define SER_FMT_VER_HIGHEST_READ 28
|
|
// Saved on disk version
|
|
#define SER_FMT_VER_HIGHEST_WRITE 28
|
|
// Lowest supported serialization version
|
|
#define SER_FMT_VER_LOWEST_READ 0
|
|
// Lowest serialization version for writing
|
|
// Can't do < 24 anymore; we have 16-bit dynamically allocated node IDs
|
|
// in memory; conversion just won't work in this direction.
|
|
#define SER_FMT_VER_LOWEST_WRITE 24
|
|
|
|
inline bool ser_ver_supported(s32 v) {
|
|
return v >= SER_FMT_VER_LOWEST_READ && v <= SER_FMT_VER_HIGHEST_READ;
|
|
}
|
|
|
|
/*
|
|
Misc. serialization functions
|
|
*/
|
|
|
|
void compressZlib(const u8 *data, size_t data_size, std::ostream &os, int level = -1);
|
|
void compressZlib(const std::string &data, std::ostream &os, int level = -1);
|
|
void decompressZlib(std::istream &is, std::ostream &os, size_t limit = 0);
|
|
|
|
// These choose between zlib and a self-made one according to version
|
|
void compress(const SharedBuffer<u8> &data, std::ostream &os, u8 version);
|
|
//void compress(const std::string &data, std::ostream &os, u8 version);
|
|
void decompress(std::istream &is, std::ostream &os, u8 version);
|