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1. Enabled IP4 layer auto configuration in case cable swap is detected.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11582 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
hhuan13
2011-04-25 01:25:11 +00:00
parent 8990b82f4f
commit 9f82599a51
3 changed files with 121 additions and 4 deletions
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67
MdeModulePkg/Universal/Network/Ip4ConfigDxe/Ip4Config.c
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@@ -1,7 +1,7 @@
/** @file
This code implements the IP4Config and NicIp4Config protocols.
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2011, 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<BR>
@@ -129,6 +129,17 @@ EfiNicIp4ConfigSetInfo (
DispatchDpc ();
}
//
// A dedicated timer is used to poll underlying media status.In case of
// cable swap, a new round auto configuration will be initiated. The timer
// starts in DHCP policy only. STATIC policy stops the timer.
//
if (NicConfig->Source == IP4_CONFIG_SOURCE_DHCP) {
gBS->SetTimer (Instance->Timer, TimerPeriodic, TICKS_PER_SECOND);
} else if (NicConfig->Source == IP4_CONFIG_SOURCE_STATIC) {
gBS->SetTimer (Instance->Timer, TimerCancel, 0);
}
return Status;
}
@@ -659,3 +670,57 @@ Ip4ConfigCleanConfig (
Ip4ConfigCleanDhcp4 (Instance);
}
/**
A dedicated timer is used to poll underlying media status. In case of
cable swap, a new round auto configuration will be initiated. The timer
will signal the IP4 to run the auto configuration again. IP4 driver will free
old IP address related resource, such as route table and Interface, then
initiate a DHCP process by IP4Config->Start to acquire new IP, eventually
create route table for new IP address.
@param[in] Event The IP4 service instance's heart beat timer.
@param[in] Context The IP4 service instance.
**/
VOID
EFIAPI
MediaChangeDetect (
IN EFI_EVENT Event,
IN VOID *Context
)
{
BOOLEAN OldMediaPresent;
EFI_STATUS Status;
EFI_SIMPLE_NETWORK_MODE SnpModeData;
IP4_CONFIG_INSTANCE *Instance;
Instance = (IP4_CONFIG_INSTANCE *) Context;
OldMediaPresent = Instance->MediaPresent;
//
// Get fresh mode data from MNP, since underlying media status may change
//
Status = Instance->Mnp->GetModeData (Instance->Mnp, NULL, &SnpModeData);
if (EFI_ERROR (Status) && (Status != EFI_NOT_STARTED)) {
return;
}
Instance->MediaPresent = SnpModeData.MediaPresent;
//
// Media transimit Unpresent to Present means new link movement is detected.
//
if (!OldMediaPresent && Instance->MediaPresent) {
//
// Signal the IP4 to run the auto configuration again. IP4 driver will free
// old IP address related resource, such as route table and Interface, then
// initiate a DHCP round by IP4Config->Start to acquire new IP, eventually
// create route table for new IP address.
//
if (Instance->ReconfigEvent != NULL) {
Status = gBS->SignalEvent (Instance->ReconfigEvent);
DispatchDpc ();
}
}
}