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MdeModulePkg: IP4 should re-initiate a DHCP if it detects network reconnection

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v2:
* Update the MediaPresent detect declaring.

IP4 driver should re-initiate a DHCP if it detects that there is a network.
To fix this issue, we can implement the DHCP re-initiate policy while the media
change detected. The Ip4 driver should set a timer to signal the Ip4 to run the
DHCP configuration again(D.O.R.A). IP4 driver should free old IP address related
resource, then initiate a DHCP process to acquire new IP.

Cc: Ye Ting <ting.ye@intel.com>
Cc: Zhang Lubo <lubo.zhang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Lubo Zhang <lubo.zhang@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18232 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Jiaxin Wu
2015-08-18 03:12:16 +00:00
committed by jiaxinwu
parent 3667305420
commit 2c3200072f
4 changed files with 133 additions and 6 deletions
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10
MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Driver.c
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@ -210,6 +210,10 @@ Ip4CreateService (
IpSb->Timer = NULL;
IpSb->ReconfigEvent = NULL;
IpSb->MediaPresent = TRUE;
//
// Create various resources. First create the route table, timer
// event and MNP child. IGMP, interface's initialization depend
@ -386,6 +390,12 @@ Ip4CleanService (
IpSb->Timer = NULL;
}
if (IpSb->ReconfigEvent != NULL) {
gBS->CloseEvent (IpSb->ReconfigEvent);
IpSb->ReconfigEvent = NULL;
}
if (IpSb->MacString != NULL) {
FreePool (IpSb->MacString);
}