From f461bb7b64b6cc3bc606a92256651c9a431bc765 Mon Sep 17 00:00:00 2001
From: Bhasker Hariharan <bhaskerh@google.com>
Date: Fri, 25 Feb 2022 11:08:46 -0800
Subject: [PATCH] Fix MTU advertised by sharedmem to exclude header size.

PiperOrigin-RevId: 430986440
---
 pkg/tcpip/link/sharedmem/sharedmem.go        | 2 +-
 pkg/tcpip/link/sharedmem/sharedmem_server.go | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkg/tcpip/link/sharedmem/sharedmem.go b/pkg/tcpip/link/sharedmem/sharedmem.go
index f8838d8a0..18e25f3d2 100644
--- a/pkg/tcpip/link/sharedmem/sharedmem.go
+++ b/pkg/tcpip/link/sharedmem/sharedmem.go
@@ -298,7 +298,7 @@ func (e *endpoint) IsAttached() bool {
 // MTU implements stack.LinkEndpoint.MTU. It returns the value initialized
 // during construction.
 func (e *endpoint) MTU() uint32 {
-	return e.mtu - e.hdrSize
+	return e.mtu
 }
 
 // Capabilities implements stack.LinkEndpoint.Capabilities.
diff --git a/pkg/tcpip/link/sharedmem/sharedmem_server.go b/pkg/tcpip/link/sharedmem/sharedmem_server.go
index 7c5f5571d..9d7773fb4 100644
--- a/pkg/tcpip/link/sharedmem/sharedmem_server.go
+++ b/pkg/tcpip/link/sharedmem/sharedmem_server.go
@@ -184,7 +184,7 @@ func (e *serverEndpoint) IsAttached() bool {
 // MTU implements stack.LinkEndpoint.MTU. It returns the value initialized
 // during construction.
 func (e *serverEndpoint) MTU() uint32 {
-	return e.mtu - e.hdrSize
+	return e.mtu
 }
 
 // Capabilities implements stack.LinkEndpoint.Capabilities.