diff --git a/writefrudata.H b/writefrudata.H
new file mode 100644
index 0000000..42924a3
--- /dev/null
+++ b/writefrudata.H
@@ -0,0 +1,53 @@
+#ifndef __IPMI_WRITE_FRU_DATA_H__
+#define __IPMI_WRITE_FRU_DATA_H__
+
+#include <stdint.h>
+#include <stddef.h>
+
+// IPMI commands for Storage net functions.
+enum ipmi_netfn_storage_cmds
+{
+    IPMI_CMD_WRITE_FRU_DATA = 0x12
+};
+
+// Format of write fru data command
+struct write_fru_data_t 
+{
+    uint8_t  frunum;
+    uint8_t  offsetls;
+    uint8_t  offsetms;
+    uint8_t  data;
+}__attribute__ ((packed));
+
+// Per IPMI v2.0 FRU specification
+struct common_header
+{
+    uint8_t fixed;
+    uint8_t internal_offset;
+    uint8_t chassis_offset;
+    uint8_t board_offset;
+    uint8_t product_offset;
+    uint8_t multi_offset;
+    uint8_t pad;
+    uint8_t crc;
+}__attribute__((packed));
+
+// Contains key info about a particular area.
+typedef struct
+{
+    uint8_t type;
+    uint8_t *offset;
+    size_t  len;
+}__attribute__((packed)) fru_area_t;
+
+// first byte in header is 1h per IPMI V2 spec.
+#define IPMI_FRU_HDR_BYTE_ZERO   1
+#define IPMI_FRU_INTERNAL_OFFSET offsetof(struct common_header, internal_offset)
+#define IPMI_FRU_CHASSIS_OFFSET  offsetof(struct common_header, chassis_offset)
+#define IPMI_FRU_BOARD_OFFSET    offsetof(struct common_header, board_offset)
+#define IPMI_FRU_PRODUCT_OFFSET  offsetof(struct common_header, product_offset)
+#define IPMI_FRU_MULTI_OFFSET    offsetof(struct common_header, multi_offset)
+#define IPMI_FRU_HDR_CRC_OFFSET  offsetof(struct common_header, crc)
+#define IPMI_EIGHT_BYTES         8
+
+#endif