Re: [edk2] [Patch] [Patch] MdeModulePkg: Add error handling when IP address is Class E

[Wu, Jiaxin]

Reviewed-by: Jiaxin Wu 

Please update the copyright before commit the patch.

Thanks,
Jiaxin

> -Original Message-
> From: Wang, Fan
> Sent: Tuesday, January 2, 2018 10:45 AM
> To: edk2-devel@lists.01.org
> Cc: Wang, Fan ; Wu, Jiaxin ; Ye,
> Ting ; Fu, Siyuan 
> Subject: [Patch] [Patch] MdeModulePkg: Add error handling when IP
> address is Class E
> 
> From: Wang Fan 
> 
> The Dhcp4.TransmitReceive() API should be able to use at any time according
> to UEFI spec. While in classless addressing network, the netmask must be
> explicitly provided together with the station address.
> But if the DHCP instance haven't be configured with a valid netmask, we
> need
> compute it according to the classful addressing rule. In such case, if the
> user configures with class E IP address, ASSERT will happen, we need to
> handle
> this case and return error status code.
> 
> Cc: Jiaxin Wu 
> Cc: Ye Ting 
> Cc: Fu Siyuan 
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Wang Fan 
> ---
>  MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c | 13
> +++--
>  1 file changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c
> b/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c
> index aad6674..b95aede 100644
> --- a/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c
> +++ b/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c
> @@ -1184,12 +1184,14 @@ EfiDhcp4Build (
>Callback by UdpIoCreatePort() when creating UdpIo for this Dhcp4 instance.
> 
>@param[in] UdpIo  The UdpIo being created.
>@param[in] ContextDhcp4 instance.
> 
> -  @retval EFI_SUCCESS   UdpIo is configured successfully.
> -  @retval other Other error occurs.
> +  @retval EFI_SUCCESS  UdpIo is configured successfully.
> +  @retval EFI_INVALID_PARAMETERClass E IP address is not supported or
> other parameters
> +   are not valid.
> +  @retval otherOther error occurs.
>  **/
>  EFI_STATUS
>  EFIAPI
>  Dhcp4InstanceConfigUdpIo (
>IN UDP_IO   *UdpIo,
> @@ -1227,11 +1229,18 @@ Dhcp4InstanceConfigUdpIo (
>  // provided together with the station address.
>  // If the DHCP instance haven't be configured with a valid netmask, we
> could only
>  // compute it according to the classful addressing rule.
>  //
>  Class = NetGetIpClass (ClientAddr);
> +//
> +//  Class E IP address is not supported here!
> +//
>  ASSERT (Class < IP4_ADDR_CLASSE);
> +if (Class >= IP4_ADDR_CLASSE) {
> +  return EFI_INVALID_PARAMETER;
> +}
> +
>  SubnetMask = gIp4AllMasks[Class << 3];
>} else {
>  SubnetMask = DhcpSb->Netmask;
>}
> 
> --
> 1.9.5.msysgit.1

___
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel

[edk2] [Patch] [Patch] MdeModulePkg: Add error handling when IP address is Class E

[fanwang2]

From: Wang Fan 

The Dhcp4.TransmitReceive() API should be able to use at any time according
to UEFI spec. While in classless addressing network, the netmask must be
explicitly provided together with the station address.
But if the DHCP instance haven't be configured with a valid netmask, we need
compute it according to the classful addressing rule. In such case, if the
user configures with class E IP address, ASSERT will happen, we need to handle
this case and return error status code.

Cc: Jiaxin Wu 
Cc: Ye Ting 
Cc: Fu Siyuan 
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wang Fan 
---
 MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c | 13 +++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c 
b/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c
index aad6674..b95aede 100644
--- a/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c
+++ b/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c
@@ -1184,12 +1184,14 @@ EfiDhcp4Build (
   Callback by UdpIoCreatePort() when creating UdpIo for this Dhcp4 instance.
 
   @param[in] UdpIo  The UdpIo being created.
   @param[in] ContextDhcp4 instance.
 
-  @retval EFI_SUCCESS   UdpIo is configured successfully.
-  @retval other Other error occurs.
+  @retval EFI_SUCCESS  UdpIo is configured successfully.
+  @retval EFI_INVALID_PARAMETERClass E IP address is not supported or 
other parameters
+   are not valid.
+  @retval otherOther error occurs.
 **/
 EFI_STATUS
 EFIAPI
 Dhcp4InstanceConfigUdpIo (
   IN UDP_IO   *UdpIo,
@@ -1227,11 +1229,18 @@ Dhcp4InstanceConfigUdpIo (
 // provided together with the station address.
 // If the DHCP instance haven't be configured with a valid netmask, we 
could only
 // compute it according to the classful addressing rule.
 //
 Class = NetGetIpClass (ClientAddr);
+//
+//  Class E IP address is not supported here!
+//
 ASSERT (Class < IP4_ADDR_CLASSE);
+if (Class >= IP4_ADDR_CLASSE) {
+  return EFI_INVALID_PARAMETER;
+}
+
 SubnetMask = gIp4AllMasks[Class << 3];
   } else {
 SubnetMask = DhcpSb->Netmask;
   }
 
-- 
1.9.5.msysgit.1

___
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel