1 files changed, 88 insertions, 0 deletions
diff --git a/include/ipmid/sessionhelper.hpp b/include/ipmid/sessionhelper.hpp
new file mode 100644
index 0000000..a96f037
--- /dev/null
+++ b/include/ipmid/sessionhelper.hpp
@@ -0,0 +1,88 @@
+#include <sstream>
+#include <string>
+
+/**
+ * @brief parse session input payload.
+ *
+ * This function retrives the session id and session handle from the session
+ * object path.
+ * A valid object path will be in the form
+ * "/xyz/openbmc_project/ipmi/session/channel/sessionId_sessionHandle"
+ *
+ * Ex: "/xyz/openbmc_project/ipmi/session/eth0/12a4567d_8a"
+ * SessionId    : 0X12a4567d
+ * SessionHandle: 0X8a
+
+ * @param[in] objectPath - session object path
+ * @param[in] sessionId - retrived session id will be asigned.
+ * @param[in] sessionHandle - retrived session handle will be asigned.
+ *
+ * @return true if session id and session handle are retrived else returns
+ * false.
+ */
+bool parseCloseSessionInputPayload(const std::string& objectPath,
+                                   uint32_t& sessionId, uint8_t& sessionHandle)
+{
+    if (objectPath.empty())
+    {
+        return false;
+    }
+    // getting the position of session id and session handle string from
+    // object path.
+    std::size_t ptrPosition = objectPath.rfind("/");
+    uint16_t tempSessionHandle = 0;
+
+    if (ptrPosition != std::string::npos)
+    {
+        // get the sessionid & session handle string from the session object
+        // path Ex: sessionIdString: "12a4567d_8a"
+        std::string sessionIdString = objectPath.substr(ptrPosition + 1);
+        std::size_t pos = sessionIdString.rfind("_");
+
+        if (pos != std::string::npos)
+        {
+            // extracting the session handle
+            std::string sessionHandleString = sessionIdString.substr(pos + 1);
+            // extracting the session id
+            sessionIdString = sessionIdString.substr(0, pos);
+            // converting session id string  and session handle string to
+            // hexadecimal.
+            std::stringstream handle(sessionHandleString);
+            handle >> std::hex >> tempSessionHandle;
+            sessionHandle = tempSessionHandle & 0xFF;
+            std::stringstream idString(sessionIdString);
+            idString >> std::hex >> sessionId;
+            return true;
+        }
+    }
+    return false;
+}
+
+/**
+ * @brief is session object matched.
+ *
+ * This function checks whether the objectPath contains reqSessionId and
+ * reqSessionHandle, e.g., "/xyz/openbmc_project/ipmi/session/eth0/12a4567d_8a"
+ * matches sessionId 0x12a4567d and sessionHandle 0x8a.
+ *
+ * @param[in] objectPath - session object path
+ * @param[in] reqSessionId - request session id
+ * @param[in] reqSessionHandle - request session handle
+ *
+ * @return true if the object is matched else return false
+ **/
+bool isSessionObjectMatched(const std::string objectPath,
+                            const uint32_t reqSessionId,
+                            const uint8_t reqSessionHandle)
+{
+    uint32_t sessionId = 0;
+    uint8_t sessionHandle = 0;
+
+    if (parseCloseSessionInputPayload(objectPath, sessionId, sessionHandle))
+    {
+        return (reqSessionId == sessionId) ||
+               (reqSessionHandle == sessionHandle);
+    }
+
+    return false;
+}