From 6c8d671994ede0b7daae74559c157f01f36c025d Mon Sep 17 00:00:00 2001
From: Hasan <hasan.mahmood@nordsec.com>
Date: Fri, 17 Jan 2025 14:28:02 +0100
Subject: [PATCH] Fix buffer cutting from end

---
 neptun/src/device/mod.rs | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/neptun/src/device/mod.rs b/neptun/src/device/mod.rs
index 6b4137f..180198a 100644
--- a/neptun/src/device/mod.rs
+++ b/neptun/src/device/mod.rs
@@ -1059,7 +1059,7 @@ impl Device {
                     let (element, iter) = unsafe { TX_RING_BUFFER.get_next() };
                     if element.is_element_free.load(Ordering::Relaxed) {
                         const DATA_OFFSET: usize = 16;
-                        let len = match iface.read(&mut element.data[DATA_OFFSET..mtu]) {
+                        let len = match iface.read(&mut element.data[DATA_OFFSET..mtu + DATA_OFFSET]) {
                             Ok(src) => src.len(),
                             Err(Error::IfaceRead(e)) => {
                                 let ek = e.kind();
@@ -1068,19 +1068,18 @@ impl Device {
                                 {
                                     break;
                                 }
-                                println!(
-                                    "Fatal read error on tun interface {e}"
+                                tracing::error!(
+                                    message="Fatal read error on tun interface: errno", error=?e
                                 );
                                 return Action::Exit;
                             }
                             Err(e) => {
-                                println!(
-                                    "Unexpected error on tun interface {e}"
+                                tracing::error!(
+                                    message="Unexpected error on tun interface", error=?e
                                 );
                                 return Action::Exit;
                             }
                         };
-                        println!("got data");
 
                         let dst_addr = match Tunn::dst_address(
                             &element.data[DATA_OFFSET..len + DATA_OFFSET],
@@ -1104,7 +1103,6 @@ impl Device {
                         }
 
                         let res = {
-                            println!("queueing for encap");
                             let mut tun = peer.tunnel.lock();
                             tun.queue_encapsulate(len, element, iter, peer.endpoint_ref(), &mut t.dst_buf[..])
                         };
@@ -1181,7 +1179,6 @@ fn send_to_network(
     udp6: Arc<Socket>,
 ) {
     while let Ok(msg) = network_rx.recv() {
-        println!("send_to_network");
         match &msg.res {
             NeptunResult::Done => {}
             NeptunResult::Err(e) => {