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MdeModulePkg: Add old IPv4_DEVICE_PATH support for new IScsiDxe 

GatewayIpAddress and SubnetMask do not exist in old IPv4_DEVICE_PATH, this
will lead new IScsiDxe to error if IPv4_DEVICE_PATH in system is not
updated.

Following UEFI2.5 spec of IPv4_DEVICE_PATH do a check before accessing
fields only defined in new version, add a judgement here to make old
IPv4_DEVICE_PATH and new IScsiDxe can cowork.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: fanwang2 <fan.wang@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
[lersek@redhat.com: rewrapped commit message]
Signed-off-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18057 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
fanwang2 2015-07-26 08:04:04 +00:00 committed by jljusten
parent 42f0586d61
commit 7b0b360633
2 changed files with 23 additions and 9 deletions
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25
MdeModulePkg/Universal/Network/IScsiDxe/IScsiMisc.c
View File

@ -814,15 +814,24 @@ IScsiGetTcpConnDevicePath (
DPathNode->Ipv4.StaticIpAddress =
(BOOLEAN) (!Session->ConfigData.NvData.InitiatorInfoFromDhcp);
IP4_COPY_ADDRESS (
&DPathNode->Ipv4.GatewayIpAddress,
&Session->ConfigData.NvData.Gateway
);
//
// Add a judgement here to support previous versions of IPv4_DEVICE_PATH.
// In previous versions of IPv4_DEVICE_PATH, GatewayIpAddress and SubnetMask
// do not exist.
// In new version of IPv4_DEVICE_PATH, structcure length is 27.
//
if (DevicePathNodeLength (&DPathNode->Ipv4) == IPv4_NODE_LEN_NEW_VERSIONS) {
IP4_COPY_ADDRESS (
&DPathNode->Ipv4.SubnetMask,
&Session->ConfigData.NvData.SubnetMask
);
IP4_COPY_ADDRESS (
&DPathNode->Ipv4.GatewayIpAddress,
&Session->ConfigData.NvData.Gateway
);
IP4_COPY_ADDRESS (
&DPathNode->Ipv4.SubnetMask,
&Session->ConfigData.NvData.SubnetMask
);
}
break;
}

7
MdeModulePkg/Universal/Network/IScsiDxe/IScsiMisc.h
View File

@ -1,7 +1,7 @@
/** @file
Miscellaneous definitions for iSCSI driver.
Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2004 - 2015, 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
@ -19,6 +19,11 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
typedef struct _ISCSI_SESSION_CONFIG_DATA ISCSI_SESSION_CONFIG_DATA;
///
/// IPv4 Device Path Node Length
///
#define IPv4_NODE_LEN_NEW_VERSIONS 27
#pragma pack(1)
typedef struct {
BOOLEAN Enabled;