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correctly handle ip fragment for udp/icmp proxy (#137)

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icmp/udp proxy do not rely on kernel net stack, but currently not handle ip fragmentation correctly.

this patch add ip resembler to merge fragmented ip packet for udp/icmp proxy
This commit is contained in:
Sijie.Sun
2024-06-09 22:59:50 +08:00
committed by GitHub
parent b2100b78d3
commit fede35cca4
8 changed files with 480 additions and 88 deletions
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easytier/src/tunnel/udp.rs
+7 -1
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@@ -158,7 +158,13 @@ where
let mut buf = BytesMut::new();
loop {
reserve_buf(&mut buf, UDP_DATA_MTU, UDP_DATA_MTU * 16);
let (dg_size, addr) = socket.recv_buf_from(&mut buf).await.unwrap();
let (dg_size, addr) = match socket.recv_buf_from(&mut buf).await {
Ok(v) => v,
Err(e) => {
tracing::error!(?e, "udp recv from socket error");
break;
}
};
tracing::trace!(
"udp recv packet: {:?}, buf: {:?}, size: {}",
addr,