Fix a bug in IP4 driver which may cause “reconnect –r” hang.

Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Ouyang Qian <qian.ouyang@intel.com>


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14170 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 27 insertions, 2 deletions

diff --git a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c
index 74bf7f76eb..29f07ce4a3 100644
--- a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c
+++ b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c
@@ -1,6 +1,6 @@
 /** @file

 

-Copyright (c) 2005 - 2012, Intel Corporation. All rights reserved.<BR>

+Copyright (c) 2005 - 2013, Intel Corporation. All rights reserved.<BR>

 This program and the accompanying materials

 are licensed and made available under the terms and conditions of the BSD License

 which accompanies this distribution.  The full text of the license may be found at

@@ -562,6 +562,9 @@ Ip4AutoConfigCallBackDpc (
   IP4_ADDR                  SubnetMask;

   IP4_ADDR                  SubnetAddress;

   IP4_ADDR                  GatewayAddress;

+  IP4_PROTOCOL              *Ip4Instance;

+  EFI_ARP_PROTOCOL          *Arp;

+  LIST_ENTRY                *Entry;

 

   IpSb      = (IP4_SERVICE *) Context;

   NET_CHECK_SIGNATURE (IpSb, IP4_SERVICE_SIGNATURE);

@@ -650,11 +653,33 @@ Ip4AutoConfigCallBackDpc (
   StationAddress = EFI_NTOHL (Data->StationAddress);

   SubnetMask = EFI_NTOHL (Data->SubnetMask);

   Status = Ip4SetAddress (IpIf, StationAddress, SubnetMask);

-

   if (EFI_ERROR (Status)) {

     goto ON_EXIT;

   }

 

+  if (IpIf->Arp != NULL) {

+    //   

+    // A non-NULL IpIf->Arp here means a new ARP child is created when setting default address, 

+    // but some IP children may have referenced the default interface before it is configured,

+    // these IP instances also consume this ARP protocol so they need to open it BY_CHILD_CONTROLLER.

+    //

+    Arp = NULL;

+    NET_LIST_FOR_EACH (Entry, &IpIf->IpInstances) {

+      Ip4Instance = NET_LIST_USER_STRUCT_S (Entry, IP4_PROTOCOL, AddrLink, IP4_PROTOCOL_SIGNATURE);

+      Status = gBS->OpenProtocol (

+                      IpIf->ArpHandle,

+                      &gEfiArpProtocolGuid,

+                      (VOID **) &Arp,

+                      gIp4DriverBinding.DriverBindingHandle,

+                      Ip4Instance->Handle,

+                      EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER

+                      );

+      if (EFI_ERROR (Status)) {

+        goto ON_EXIT;

+      }

+    }

+  }

+

   Ip4AddRoute (

     IpSb->DefaultRouteTable,

     StationAddress,