diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..ef6508b
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * 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.
+ */
+
+#include "main.hpp"
+
+#include "cable.hpp"
+#include "cpld.hpp"
+#include "eth.hpp"
+#include "psu.hpp"
+
+#include <host-ipmid/ipmid-api.h>
+
+#include <cstdint>
+#include <experimental/filesystem>
+#include <fstream>
+#include <host-ipmid/iana.hpp>
+#include <host-ipmid/oemrouter.hpp>
+#include <sstream>
+#include <string>
+#include <system_error>
+
+namespace oem
+{
+namespace google
+{
+constexpr int sysCmd = 50;
+} // namespace google
+} // namespace oem
+
+namespace google
+{
+namespace ipmi
+{
+
+static ipmi_ret_t HandleSysCommand(ipmi_cmd_t cmd, const uint8_t* reqBuf,
+                                   uint8_t* replyCmdBuf, size_t* dataLen)
+{
+    // Verify it's at least as long as it needs to be for a subcommand.
+    if ((*dataLen) < 1)
+    {
+        fprintf(stderr, "*dataLen too small: %lu\n", (*dataLen));
+        return IPMI_CC_INVALID;
+    }
+
+    switch (reqBuf[0])
+    {
+        case SysCableCheck:
+            return CableCheck(reqBuf, replyCmdBuf, dataLen);
+        case SysCpldVersion:
+            return CpldVersion(reqBuf, replyCmdBuf, dataLen);
+        case SysGetEthDevice:
+            return GetEthDevice(reqBuf, replyCmdBuf, dataLen);
+        case SysPsuHardReset:
+            return PsuHardReset(reqBuf, replyCmdBuf, dataLen);
+        default:
+            fprintf(stderr, "Invalid subcommand: 0x%x\n", reqBuf[0]);
+            return IPMI_CC_INVALID;
+    }
+}
+
+void setupGlobalOemCableCheck() __attribute__((constructor));
+
+void setupGlobalOemCableCheck()
+{
+    oem::Router* oemRouter = oem::mutableRouter();
+
+    fprintf(stderr, "Registering OEM:[%#08X], Cmd:[%#04X] for Sys Commands\n",
+            oem::googOemNumber, oem::google::sysCmd);
+
+    oemRouter->registerHandler(oem::googOemNumber, oem::google::sysCmd,
+                               HandleSysCommand);
+}
+
+} // namespace ipmi
+} // namespace google