From 3f36be64af3ce545259bdb9695cd9bedb60a5751 Mon Sep 17 00:00:00 2001
From: Benjamin Saunders <ben.e.saunders@gmail.com>
Date: Sat, 16 Nov 2019 16:57:19 -0800
Subject: [PATCH] Drop truncated UDP packets

These would fail decryption anyway, so this saves us some CPU.
---
 quinn/src/platform/unix.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/quinn/src/platform/unix.rs b/quinn/src/platform/unix.rs
index 8400346c3..09065e838 100644
--- a/quinn/src/platform/unix.rs
+++ b/quinn/src/platform/unix.rs
@@ -151,6 +151,9 @@ impl super::UdpExt for UdpSocket {
                 }
                 return Err(e);
             }
+            if hdr.msg_flags & libc::MSG_TRUNC != 0 {
+                continue;
+            }
             break n;
         };
         let name = unsafe { name.assume_init() };