Guarantee the QUIC UDP socket is non blocking

1 files changed, 4 insertions, 0 deletions

diff --git a/tunnel-obfuscation/src/quic.rs b/tunnel-obfuscation/src/quic.rs
index c966bf7d12..7cd4fcc305 100644
--- a/tunnel-obfuscation/src/quic.rs
+++ b/tunnel-obfuscation/src/quic.rs
@@ -151,6 +151,10 @@ impl Quic {
                 socket.set_mark(fwmark).map_err(Error::Fwmark)?;
             }
 
+            // The caller is responsible for ensuring that the socket is in non-blocking mode
+            // when calling UdpSocket::from_std
+            socket.set_nonblocking(true).map_err(Error::BindError)?;
+
             UdpSocket::from_std(std::net::UdpSocket::from(socket)).map_err(Error::BindError)?
         };