[efi] Expose DHCP packets via the Apple NetBoot protocol

Mac OS X uses non-standard EFI protocols to obtain the DHCP packets
from the UEFI firmware.

Originally-implemented-by: Michael Kuron <m.kuron@gmx.de>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/src/include/ipxe/efi/Protocol/AppleNetBoot.h b/src/include/ipxe/efi/Protocol/AppleNetBoot.h
new file mode 100644
index 000000000..144beff1c
--- /dev/null
+++ b/src/include/ipxe/efi/Protocol/AppleNetBoot.h
@@ -0,0 +1,46 @@
+#ifndef __EFI_APPLE_NET_BOOT_PROTOCOL_H__
+#define __EFI_APPLE_NET_BOOT_PROTOCOL_H__
+
+/** @file
+ *
+ * Apple Net Boot Protocol
+ *
+ */
+
+FILE_LICENCE ( BSD3 );
+
+#define EFI_APPLE_NET_BOOT_PROTOCOL_GUID				\
+	{ 0x78ee99fb, 0x6a5e, 0x4186,					\
+	{ 0x97, 0xde, 0xcd, 0x0a, 0xba, 0x34, 0x5a, 0x74 } }
+
+typedef struct _EFI_APPLE_NET_BOOT_PROTOCOL EFI_APPLE_NET_BOOT_PROTOCOL;
+
+/**
+  Get a DHCP packet obtained by the firmware during NetBoot.
+
+  @param  This		A pointer to the APPLE_NET_BOOT_PROTOCOL instance.
+  @param  BufferSize	A pointer to the size of the buffer in bytes.
+  @param  DataBuffer	The memory buffer to copy the packet to. If it is
+			NULL, then the size of the packet is returned
+			in BufferSize.
+  @retval EFI_SUCCESS		The packet was copied.
+  @retval EFI_BUFFER_TOO_SMALL	The BufferSize is too small to read the
+				current packet. BufferSize has been
+				updated with the size needed to
+				complete the request.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *GET_DHCP_RESPONSE) (
+  IN EFI_APPLE_NET_BOOT_PROTOCOL	*This,
+  IN OUT UINTN				*BufferSize,
+  OUT VOID				*DataBuffer
+  );
+
+struct _EFI_APPLE_NET_BOOT_PROTOCOL
+{
+  GET_DHCP_RESPONSE	GetDhcpResponse;
+  GET_DHCP_RESPONSE	GetBsdpResponse;
+};
+
+#endif /*__EFI_APPLE_NET_BOOT_PROTOCOL_H__ */