ipmbbridge initial implementation

ipmbbridge gives the ability for openbmc to host ipmb transactions over
smbus

Change-Id: I3744dbef5a6db0b2ff4f2b691e68ca8dc3b1d24b
Signed-off-by: Dawid Frycki <dawid.frycki@intel.com>
Signed-off-by: Ed Tanous <ed.tanous@intel.com>
diff --git a/ipmbutils.hpp b/ipmbutils.hpp
new file mode 100644
index 0000000..b6c2139
--- /dev/null
+++ b/ipmbutils.hpp
@@ -0,0 +1,29 @@
+/* Copyright 2018 Intel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#ifndef IPMBUTILS_HPP
+#define IPMBUTILS_HPP
+
+/**
+ * @brief function performing IPMB header and data checksum validation
+ */
+bool isFrameValid(IPMB_HEADER *frame, uint8_t length);
+
+/**
+ * @brief function computing IPMB layer checksum
+ */
+uint8_t ipmbChecksumCompute(uint8_t *data, uint8_t length);
+
+#endif