diff options
Diffstat (limited to 'NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h')
| -rw-r--r-- | NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h b/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h index 0eb9c669b5..f2422c2f28 100644 --- a/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h +++ b/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h @@ -45,6 +45,49 @@ typedef struct _DHCP6_INSTANCE DHCP6_INSTANCE; #define DHCP6_SERVICE_SIGNATURE SIGNATURE_32 ('D', 'H', '6', 'S')
#define DHCP6_INSTANCE_SIGNATURE SIGNATURE_32 ('D', 'H', '6', 'I')
+//
+// For more information on DHCP options see RFC 8415, Section 21.1
+//
+// The format of DHCP options is:
+//
+// 0 1 2 3
+// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// | option-code | option-len |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// | option-data |
+// | (option-len octets) |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//
+#define DHCP6_SIZE_OF_OPT_CODE (sizeof(UINT16))
+#define DHCP6_SIZE_OF_OPT_LEN (sizeof(UINT16))
+
+//
+// Combined size of Code and Length
+//
+#define DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN (DHCP6_SIZE_OF_OPT_CODE + \
+ DHCP6_SIZE_OF_OPT_LEN)
+
+STATIC_ASSERT (
+ DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN == 4,
+ "Combined size of Code and Length must be 4 per RFC 8415"
+ );
+
+//
+// Offset to the length is just past the code
+//
+#define DHCP6_OPT_LEN_OFFSET(a) (a + DHCP6_SIZE_OF_OPT_CODE)
+STATIC_ASSERT (
+ DHCP6_OPT_LEN_OFFSET (0) == 2,
+ "Offset of length is + 2 past start of option"
+ );
+
+#define DHCP6_OPT_DATA_OFFSET(a) (a + DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN)
+STATIC_ASSERT (
+ DHCP6_OPT_DATA_OFFSET (0) == 4,
+ "Offset to option data should be +4 from start of option"
+ );
+
#define DHCP6_PACKET_ALL 0
#define DHCP6_PACKET_STATEFUL 1
#define DHCP6_PACKET_STATELESS 2
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