message: Add get_cookie method

The message cookie will be used to generate a unique hash id.

Change-Id: Iffb30a287659aa633b399fb1b2efaa450bf66240
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/sdbusplus/message.hpp b/sdbusplus/message.hpp
index 7cb4c1c..7ef81e6 100644
--- a/sdbusplus/message.hpp
+++ b/sdbusplus/message.hpp
@@ -114,6 +114,17 @@ struct message
         return sd_bus_message_is_method_error(_msg.get(), nullptr);
     }
 
+    /** @brief Get the transaction cookie of a message.
+      *
+      * @return The transaction cookie of a message.
+      */
+    auto get_cookie()
+    {
+        uint64_t cookie;
+        sd_bus_message_get_cookie(_msg.get(), &cookie);
+        return cookie;
+    }
+
     /** @brief Check if message is a method call for an interface/method.
      *
      *  @param[in] interface - The interface to match.