redstrate/kawari
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Move compression logic out of send_packet and into it's own function

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This commit is contained in:
Joshua Goins 2025-03-17 17:28:57 -04:00
parent a7f56a62a1
commit 974efe3824
2 changed files with 35 additions and 24 deletions
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31
src/packet/compression.rs
View file

@ -1,4 +1,4 @@
use binrw::binrw;
use binrw::{BinWrite, binrw};
use std::io::Cursor;
use binrw::{BinRead, BinResult};
@ -8,7 +8,7 @@ use crate::{
packet::{PacketHeader, PacketSegment},
};
use super::ReadWriteIpcSegment;
use super::{PacketState, ReadWriteIpcSegment};
#[binrw]
#[brw(repr = u8)]
@ -56,3 +56,30 @@ pub(crate) fn decompress<T: ReadWriteIpcSegment>(
Ok(segments)
}
pub(crate) fn compress<T: ReadWriteIpcSegment>(
state: &mut PacketState,
compression_type: &CompressionType,
segments: &[PacketSegment<T>],
) -> (Vec<u8>, usize) {
let mut segments_buffer = Cursor::new(Vec::new());
for segment in segments {
segment
.write_le_args(
&mut segments_buffer,
(state.client_key.as_ref().map(|s: &[u8; 16]| s.as_slice()),),
)
.unwrap();
}
let segments_buffer = segments_buffer.into_inner();
let segments_buffer_len = segments_buffer.len();
match compression_type {
CompressionType::Uncompressed => (segments_buffer, 0),
CompressionType::Oodle => (
state.clientbound_oodle.encode(segments_buffer),
segments_buffer_len,
),
}
}

28
src/packet/packet.rs
View file

@ -7,7 +7,11 @@ use std::{
use binrw::{BinRead, BinWrite, binrw};
use tokio::{io::AsyncWriteExt, net::TcpStream};
use crate::{common::read_string, oodle::OodleNetwork, packet::encryption::decrypt};
use crate::{
common::read_string,
oodle::OodleNetwork,
packet::{compression::compress, encryption::decrypt},
};
use super::{
CompressionType, compression::decompress, encryption::encrypt, ipc::ReadWriteIpcSegment,
@ -144,27 +148,7 @@ pub async fn send_packet<T: ReadWriteIpcSegment>(
.try_into()
.unwrap();
let mut segments_buffer = Cursor::new(Vec::new());
for segment in segments {
segment
.write_le_args(
&mut segments_buffer,
(state.client_key.as_ref().map(|s: &[u8; 16]| s.as_slice()),),
)
.unwrap();
}
let segments_buffer = segments_buffer.into_inner();
let mut uncompressed_size = 0;
let data = match compression_type {
CompressionType::Uncompressed => segments_buffer,
CompressionType::Oodle => {
uncompressed_size = segments_buffer.len();
state.clientbound_oodle.encode(segments_buffer)
}
};
let (data, uncompressed_size) = compress(state, &compression_type, segments);
let size = std::mem::size_of::<PacketHeader>() + data.len();
let header = PacketHeader {