eglantine-cirakg/src/common/zstd_compression.cpp, branch nx2

network: close each bsd fd once and drop unwanted or malformed room packets

2026-11-03T00:39:54+00:00

Two threads closing the same fd both copied the descriptor and both called Close(), so a host socket could be closed twice, and the second closesocket could hit an unrelated socket that had reused the host fd. CloseImpl now frees the slot under file_descriptors_mutex first and only that thread closes the socket; the other gets EBADF. OnProxyPacketReceived decompressed every room packet when any fd had a socket, including native sockets and proxy sockets on other ports. Sockets now report through AcceptsProxyPacket whether they want a packet, and only those are collected, so an unwanted packet is not decompressed. DecompressDataZSTD passed the frame's declared size straight to the vector constructor, so a malformed or unsized frame from a room member threw on the room thread. The new TryDecompressDataZSTD rejects invalid, unsized and oversized frames, and bsd drops such packets with a warning. DecompressDataZSTD now returns an empty vector for them instead of throwing. Assisted-by: Claude Opus 5.5 (investigation and implementation)

[core] Support block-compressed NSZ and XCZ (#4552)

2026-10-26T16:23:18+00:00

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions). - [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md). - [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability. ------------------- - Add NCZBLOCK (nsz -B / .xcz) reader: each read decodes only the covered blocks and re-encrypts CTR sections, no disk output. - Allow installing solid .nsz to NAND via DecompressNCZForInstall (lazy, incremental decode with frontier, O(n) instead of O(n^2)). - Accept BKTR updates with thousands of sections (MaxSectionCount = 0x10000). - Wire .nsz/.xcz into loader, registered cache, scanner, and NAND install (content_manager.h), and reject solid NCZ from the game list. - Bump the pinned zstd to 33618c8 in cpmfile.json, which includes the upstream AArch64 revert ([33618c89](https://github.com/facebook/zstd/commit/33618c89e511637f8a6ef955b3501766d71feb53)) for a ZSTD_decodeSequence branch optimization that could corrupt data on ARM64; without it, solid NCZ decoding on Android fails with "Data corruption detected". NCZ format and CTR counter semantics follow the reference nsz tool and its Rust port: - https://github.com/nicoboss/nsz (Decompressor.py, BlockDecompressorReader.py) - https://docs.rs/nsz-rs/0.3.0/src/nsz_rs/decompress.rs.html The last-block edge case (decompressed size is an exact multiple of block size) is handled as described in https://github.com/nicoboss/nsz/issues/210 Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4552 Reviewed-by: CamilleLaVey Reviewed-by: Shinmegumi

zstd: Use ZSTD_getFrameContentSize instead of ZSTD_getDecompressedSize

2023-03-24T02:16:20+00:00

general: Convert source file copyright comments over to SPDX

2022-04-23T09:55:32+00:00

This formats all copyright comments according to SPDX formatting guidelines. Additionally, this resolves the remaining GPLv2 only licensed files by relicensing them to GPLv2.0-or-later.

zstd_compression: Make use of std::span

2021-05-24T19:01:04+00:00

Allows for the incoming data stream to be non-allocating.

common/compression: Roll back std::span changes

2020-08-15T21:17:56+00:00

Seems like all compilers don't support std::span yet.

zstd_compression: Make use of std::span in interfaces

2020-07-25T07:11:56+00:00

Allows condensing the data and size parameters into a single argument.

common/zstd_compression: Remove #pragma once directive from source file

2019-05-04T05:54:29+00:00

Introduced in 2d755221e8bb1e9d3f72e214d9f46a14cdc4971b. This is only necessary within header files.

common/zstd_compression: simplify decompression interface

2019-03-29T17:22:08+00:00

common/zstd_compression: Add Zstandard wrapper

2019-03-29T17:22:08+00:00