1 files changed, 17 insertions, 0 deletions
diff --git a/NetworkPkg/UefiPxeBcDxe/PxeBcDhcp6.h b/NetworkPkg/UefiPxeBcDxe/PxeBcDhcp6.h
index c86f6d391b..6357d27fae 100644
--- a/NetworkPkg/UefiPxeBcDxe/PxeBcDhcp6.h
+++ b/NetworkPkg/UefiPxeBcDxe/PxeBcDhcp6.h
@@ -34,6 +34,23 @@
 #define PXEBC_ADDR_START_DELIMITER        '['
 #define PXEBC_ADDR_END_DELIMITER          ']'
 
+//
+// A DUID consists of a 2-octet type code represented in network byte
+// order, followed by a variable number of octets that make up the
+// actual identifier.  The length of the DUID (not including the type
+// code) is at least 1 octet and at most 128 octets.
+//
+#define PXEBC_MIN_SIZE_OF_DUID  (sizeof(UINT16) + 1)
+#define PXEBC_MAX_SIZE_OF_DUID  (sizeof(UINT16) + 128)
+
+//
+// This define represents the combineds code and length field from
+// https://datatracker.ietf.org/doc/html/rfc3315#section-22.1
+//
+#define PXEBC_COMBINED_SIZE_OF_OPT_CODE_AND_LEN  \
+      (sizeof (((EFI_DHCP6_PACKET_OPTION *)0)->OpCode) + \
+      sizeof (((EFI_DHCP6_PACKET_OPTION *)0)->OpLen))
+
 #define GET_NEXT_DHCP6_OPTION(Opt) \
   (EFI_DHCP6_PACKET_OPTION *) ((UINT8 *) (Opt) + \
   sizeof (EFI_DHCP6_PACKET_OPTION) + (NTOHS ((Opt)->OpLen)) - 1)