From c79de074b6a35ab514ec88bc2811845e6326fc0f Mon Sep 17 00:00:00 2001
From: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud@hp.com>
Date: Mon, 31 Aug 2015 07:44:12 +0000
Subject: MdeModulePkg/NetworkPkg: Locate IpSec on IP packet processing only if
 it's installed.

Modified the logic in Ip4Dxe and Ip6Dxe to not locate EFI_IPSEC2_PROTOCOL on each
message transmit/receive. Instead, register a callback in the drivers entry points
on the IpSec protocol installation, and process only if the protocol is installed.
This speeds up the network stacks when IpSec is not installed since there is a
penalty associated with searching the entire handle database on each packet processing.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud@hp.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18365 6f19259b-4bc3-4df7-8a09-765794883524
---
 NetworkPkg/Ip6Dxe/Ip6Driver.c | 38 ++++++++++++++++++++++++++++++++++++++
 NetworkPkg/Ip6Dxe/Ip6Impl.h   |  2 ++
 NetworkPkg/Ip6Dxe/Ip6Input.c  |  6 ++++++
 3 files changed, 46 insertions(+)

(limited to 'NetworkPkg/Ip6Dxe')

diff --git a/NetworkPkg/Ip6Dxe/Ip6Driver.c b/NetworkPkg/Ip6Dxe/Ip6Driver.c
index 6958784..4fde476 100644
--- a/NetworkPkg/Ip6Dxe/Ip6Driver.c
+++ b/NetworkPkg/Ip6Dxe/Ip6Driver.c
@@ -2,6 +2,7 @@
   The driver binding and service binding protocol for IP6 driver.
 
   Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+  (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
 
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -24,6 +25,33 @@ EFI_DRIVER_BINDING_PROTOCOL gIp6DriverBinding = {
   NULL
 };
 
+BOOLEAN  mIpSec2Installed = FALSE;
+
+/**
+   Callback function for IpSec2 Protocol install.
+
+   @param[in] Event           Event whose notification function is being invoked
+   @param[in] Context         Pointer to the notification function's context
+
+   @retval  EFI_SUCCESS       Callback successful.
+**/
+VOID
+EFIAPI
+IpSec2InstalledCallback (
+  IN EFI_EVENT  Event,
+  IN VOID       *Context
+  )
+{
+  //
+  // Close the event so it does not get called again.
+  //
+  gBS->CloseEvent (Event);
+
+  mIpSec2Installed = TRUE;
+
+  return;
+}
+
 /**
   This is the declaration of an EFI image entry point. This entry point is
   the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
@@ -46,6 +74,16 @@ Ip6DriverEntryPoint (
   IN EFI_SYSTEM_TABLE       *SystemTable
   )
 {
+  VOID            *Registration;
+
+  EfiCreateProtocolNotifyEvent (
+    &gEfiIpSec2ProtocolGuid,
+    TPL_CALLBACK,
+    IpSec2InstalledCallback,
+    NULL,
+    &Registration
+    );
+
   return EfiLibInstallDriverBindingComponentName2 (
            ImageHandle,
            SystemTable,
diff --git a/NetworkPkg/Ip6Dxe/Ip6Impl.h b/NetworkPkg/Ip6Dxe/Ip6Impl.h
index 8f114bb..d30246b 100644
--- a/NetworkPkg/Ip6Dxe/Ip6Impl.h
+++ b/NetworkPkg/Ip6Dxe/Ip6Impl.h
@@ -2,6 +2,7 @@
   Implementation of EFI_IP6_PROTOCOL protocol interfaces and type definitions.
 
   Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
+  (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
 
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -89,6 +90,7 @@
 #define IP6_NO_MAPPING(IpInstance) (!(IpInstance)->Interface->Configured)
 
 extern EFI_IPSEC2_PROTOCOL *mIpSec;
+extern BOOLEAN             mIpSec2Installed;
 
 //
 // IP6_TXTOKEN_WRAP wraps the upper layer's transmit token.
diff --git a/NetworkPkg/Ip6Dxe/Ip6Input.c b/NetworkPkg/Ip6Dxe/Ip6Input.c
index cf88884..e53e087 100644
--- a/NetworkPkg/Ip6Dxe/Ip6Input.c
+++ b/NetworkPkg/Ip6Dxe/Ip6Input.c
@@ -2,6 +2,7 @@
   IP6 internal functions to process the incoming packets.
 
   Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+  (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
 
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -525,6 +526,11 @@ Ip6IpSecProcessPacket (
   EFI_IP6_HEADER            ZeroHead;
 
   Status        = EFI_SUCCESS;
+
+  if (!mIpSec2Installed) {
+    goto ON_EXIT;
+  }
+  
   Packet        = *Netbuf;
   RecycleEvent  = NULL;
   IpSecWrap     = NULL;
-- 
cgit v1.1