Re: [Patch] MdeModulePkg: Discard received broadcast message in DxeIpIpLib.

["Wu, Jiaxin" <jiaxin.wu@intel.com>]

Reviewed-by: Wu Jiaxin <jiaxin.wu@intel.com>


Thanks,
Jiaxin

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Fu
> Siyuan
> Sent: Friday, April 21, 2017 9:50 AM
> To: edk2-devel@lists.01.org
> Cc: Ye, Ting <ting.ye@intel.com>; Wu, Jiaxin <jiaxin.wu@intel.com>
> Subject: [edk2] [Patch] MdeModulePkg: Discard received broadcast message
> in DxeIpIpLib.
> 
> Cc: Ye Ting <ting.ye@intel.com>
> Cc: Wu Jiaxin <jiaxin.wu@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
> ---
>  MdeModulePkg/Library/DxeIpIoLib/DxeIpIoLib.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/MdeModulePkg/Library/DxeIpIoLib/DxeIpIoLib.c
> b/MdeModulePkg/Library/DxeIpIoLib/DxeIpIoLib.c
> index 9a70e90..abc07fb 100644
> --- a/MdeModulePkg/Library/DxeIpIoLib/DxeIpIoLib.c
> +++ b/MdeModulePkg/Library/DxeIpIoLib/DxeIpIoLib.c
> @@ -1028,6 +1028,12 @@ IpIoListenHandlerDpc (
>    }
> 
>    if (IpIo->IpVersion == IP_VERSION_4) {
> +    if (IP4_IS_LOCAL_BROADCAST (EFI_IP4 (RxData->Ip4RxData.Header-
> >SourceAddress))) {
> +      //
> +      // The source address is a broadcast address, discard it.
> +      //
> +      goto CleanUp;
> +    }
>      if ((EFI_IP4 (RxData->Ip4RxData.Header->SourceAddress) != 0) &&
>          (IpIo->SubnetMask != 0) &&
>          IP4_NET_EQUAL (IpIo->StationIp, EFI_NTOHL (((EFI_IP4_RECEIVE_DATA
> *) RxData)->Header->SourceAddress), IpIo->SubnetMask) &&
> --
> 2.7.4.windows.1
> 
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