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MdeModulePkg: Check for the max DHCP packet length before use it.

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This patch updates the PXE driver to drop the input DHCP packet if it
exceed the maximum length.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-By: Wu Jiaxin <jiaxin.wu@intel.com>
This commit is contained in:
Fu Siyuan
2016-11-16 13:36:37 +08:00
parent bd5ef82698
commit 4f6b33b460
2 changed files with 24 additions and 1 deletions
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2
MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcDhcp.h
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@@ -18,7 +18,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#define PXEBC_DHCP4_MAX_OPTION_NUM 16
#define PXEBC_DHCP4_MAX_OPTION_SIZE 312
#define PXEBC_DHCP4_MAX_PACKET_SIZE 1472
#define PXEBC_DHCP4_MAX_PACKET_SIZE (sizeof (EFI_PXE_BASE_CODE_PACKET))
#define PXEBC_DHCP4_S_PORT 67
#define PXEBC_DHCP4_C_PORT 68