From a76280c53b130328c66b933eb2abada610344d3b Mon Sep 17 00:00:00 2001
From: lbl8603 <49143209+lbl8603@users.noreply.github.com>
Date: Wed, 29 May 2024 22:47:48 +0800
Subject: [PATCH] =?UTF-8?q?=E8=B0=83=E6=95=B4=E4=BB=A3=E7=A0=81=E7=BB=93?=
 =?UTF-8?q?=E6=9E=84?=
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---
 vnt/src/cipher/xor/xor.rs             | 16 +++-----
 vnt/src/handle/tun_tap/tun_handler.rs | 57 ++++++---------------------
 2 files changed, 19 insertions(+), 54 deletions(-)

diff --git a/vnt/src/cipher/xor/xor.rs b/vnt/src/cipher/xor/xor.rs
index 0d804b1..7a76241 100644
--- a/vnt/src/cipher/xor/xor.rs
+++ b/vnt/src/cipher/xor/xor.rs
@@ -54,11 +54,9 @@ impl XORCipher {
             return Err(anyhow!("not encrypt"));
         }
         let key = &self.key;
-        net_packet
-            .payload_mut()
-            .iter_mut()
-            .enumerate()
-            .for_each(|(i, byte)| *byte = *byte ^ key[i & 31]);
+        for (i, byte) in net_packet.payload_mut().iter_mut().enumerate() {
+            *byte ^= key[i & 31];
+        }
         net_packet.set_encrypt_flag(false);
         Ok(())
     }
@@ -68,11 +66,9 @@ impl XORCipher {
     ) -> anyhow::Result<()> {
         net_packet.set_encrypt_flag(true);
         let key = &self.key;
-        net_packet
-            .payload_mut()
-            .iter_mut()
-            .enumerate()
-            .for_each(|(i, byte)| *byte = *byte ^ key[i & 31]);
+        for (i, byte) in net_packet.payload_mut().iter_mut().enumerate() {
+            *byte ^= key[i & 31];
+        }
         Ok(())
     }
 }
diff --git a/vnt/src/handle/tun_tap/tun_handler.rs b/vnt/src/handle/tun_tap/tun_handler.rs
index 4d94d86..9729f67 100644
--- a/vnt/src/handle/tun_tap/tun_handler.rs
+++ b/vnt/src/handle/tun_tap/tun_handler.rs
@@ -45,47 +45,6 @@ fn icmp(device_writer: &Device, mut ipv4_packet: IpV4Packet<&mut [u8]>) -> anyho
     Ok(())
 }
 
-/// 接收tun数据，并且转发到udp上
-pub(crate) fn handle(
-    context: &ChannelContext,
-    data: &mut [u8],
-    len: usize,
-    extend: &mut [u8],
-    device_writer: &Device,
-    current_device: CurrentDeviceInfo,
-    ip_route: &ExternalRoute,
-    #[cfg(feature = "ip_proxy")] proxy_map: &Option<IpProxyMap>,
-    client_cipher: &Cipher,
-    server_cipher: &Cipher,
-    device_list: &Mutex<(u16, Vec<PeerDeviceInfo>)>,
-    compressor: &Compressor,
-) -> anyhow::Result<()> {
-    //忽略掉结构不对的情况（ipv6数据、win tap会读到空数据），不然日志打印太多了
-    let ipv4_packet = match IpV4Packet::new(&mut data[12..len]) {
-        Ok(packet) => packet,
-        Err(_) => return Ok(()),
-    };
-    let src_ip = ipv4_packet.source_ip();
-    let dest_ip = ipv4_packet.destination_ip();
-    if src_ip == dest_ip {
-        return icmp(&device_writer, ipv4_packet);
-    }
-    return base_handle(
-        context,
-        data,
-        len,
-        extend,
-        current_device,
-        ip_route,
-        #[cfg(feature = "ip_proxy")]
-        proxy_map,
-        client_cipher,
-        server_cipher,
-        device_list,
-        compressor,
-    );
-}
-
 pub fn start(
     stop_manager: StopManager,
     context: ChannelContext,
@@ -265,15 +224,16 @@ fn broadcast(
     Ok(())
 }
 
+/// 接收tun数据，并且转发到udp上
 /// 实现一个原地发送，必须保证是如下结构
 /// |12字节开头|ip报文|至少1024字节结尾|
 ///
-#[inline]
-fn base_handle(
+pub(crate) fn handle(
     context: &ChannelContext,
     buf: &mut [u8],
     data_len: usize, //数据总长度=12+ip包长度
     extend: &mut [u8],
+    device_writer: &Device,
     current_device: CurrentDeviceInfo,
     ip_route: &ExternalRoute,
     #[cfg(feature = "ip_proxy")] proxy_map: &Option<IpProxyMap>,
@@ -282,7 +242,16 @@ fn base_handle(
     device_list: &Mutex<(u16, Vec<PeerDeviceInfo>)>,
     compressor: &Compressor,
 ) -> anyhow::Result<()> {
-    let ipv4_packet = IpV4Packet::new(&buf[12..data_len])?;
+    //忽略掉结构不对的情况（ipv6数据、win tap会读到空数据），不然日志打印太多了
+    let ipv4_packet = match IpV4Packet::new(&mut buf[12..data_len]) {
+        Ok(packet) => packet,
+        Err(_) => return Ok(()),
+    };
+    let src_ip = ipv4_packet.source_ip();
+    let dest_ip = ipv4_packet.destination_ip();
+    if src_ip == dest_ip {
+        return icmp(&device_writer, ipv4_packet);
+    }
     let protocol = ipv4_packet.protocol();
     let src_ip = ipv4_packet.source_ip();
     let mut dest_ip = ipv4_packet.destination_ip();