[RFC 2/4] spdm: add spdm storage transport virtual header

[Wilfred Mallawa]

This header contains the transport encoding for an SPDM message that
uses the SPDM over Storage transport as defined by the DMTF DSP0286.

Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com>
---
 include/system/spdm-socket.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/system/spdm-socket.h b/include/system/spdm-socket.h
index 2b7d03f82d..fc007e5b48 100644
--- a/include/system/spdm-socket.h
+++ b/include/system/spdm-socket.h
@@ -88,6 +88,18 @@ bool spdm_socket_send(const int socket, uint32_t socket_cmd,
  */
 void spdm_socket_close(const int socket, uint32_t transport_type);
 
+/*
+ * Defines the transport encoding for SPDM, this information shall be passed
+ * down to the SPDM server, when conforming to the SPDM over Storage standard
+ * as defined by DSP0286.
+ */
+typedef struct QEMU_PACKED {
+    uint8_t security_protocol;
+    uint16_t security_protocol_specific;
+    bool inc_512;
+    uint32_t length;
+} StorageSpdmTransportHeader;
+
 #define SPDM_SOCKET_COMMAND_NORMAL                0x0001
 #define SPDM_SOCKET_STORAGE_CMD_IF_SEND           0x0002
 #define SPDM_SOCKET_STORAGE_CMD_IF_RECV           0x0003
-- 
2.47.1