r17854: Steal the LDAP in NTSTATUS trick from Samba4

Thanks to Michael Adam <ma@sernet.de>

Volker
(This used to be commit 91878f9b6fbe5187fb7d0464008ea0abe7f11a73)

1 files changed, 24 insertions, 2 deletions

diff --git a/source3/include/nt_status.h b/source3/include/nt_status.h
index c48beafb6e..2b681101db 100644
--- a/source3/include/nt_status.h
+++ b/source3/include/nt_status.h
@@ -66,12 +66,34 @@ typedef uint32 WERROR;
         }\
 } while (0)
 
+
+/* The top byte in an NTSTATUS code is used as a type field.
+ * Windows only uses value 0xC0 as an indicator for an NT error
+ * and 0x00 for success.
+ * So we can use the type field to store other types of error codes
+ * inside the three lower bytes. 
+ * NB: The system error codes (errno) are not integrated via a type of
+ *     their own but are mapped to genuine NT error codes via 
+ *     map_nt_error_from_unix() */
+
+#define NT_STATUS_TYPE(status) ((NT_STATUS_V(status) & 0xFF000000) >> 24)
+
+#define NT_STATUS_TYPE_DOS  0xF1
+#define NT_STATUS_TYPE_LDAP 0xF2
+
 /* this defines special NTSTATUS codes to represent DOS errors.  I
    have chosen this macro to produce status codes in the invalid
    NTSTATUS range */
-#define NT_STATUS_DOS(class, code) NT_STATUS(0xF1000000 | ((class)<<16) | code)
-#define NT_STATUS_IS_DOS(status) ((NT_STATUS_V(status) & 0xFF000000) == 0xF1000000)
+#define NT_STATUS_DOS_MASK (NT_STATUS_TYPE_DOS << 24)
+#define NT_STATUS_DOS(class, code) NT_STATUS(NT_STATUS_DOS_MASK | ((class)<<16) | code)
+#define NT_STATUS_IS_DOS(status) ((NT_STATUS_V(status) & 0xFF000000) == NT_STATUS_DOS_MASK)
 #define NT_STATUS_DOS_CLASS(status) ((NT_STATUS_V(status) >> 16) & 0xFF)
 #define NT_STATUS_DOS_CODE(status) (NT_STATUS_V(status) & 0xFFFF)
 
+/* define ldap error codes as NTSTATUS codes */
+#define NT_STATUS_LDAP_MASK (NT_STATUS_TYPE_LDAP << 24)
+#define NT_STATUS_LDAP(code) NT_STATUS(NT_STATUS_LDAP_MASK | code)
+#define NT_STATUS_IS_LDAP(status) ((NT_STATUS_V(status) & 0xFF000000) == NT_STATUS_LDAP_MASK)
+#define NT_STATUS_LDAP_CODE(status) (NT_STATUS_V(status) & ~0xFF000000)
+
 #endif