Add PATCH support for SessionTimeout Property

- This commit would add the patch support for the session
  timeout propery under the sessionservice.
- This commit also brings in support for persistent session
  timeout property.

Tested By:
1. Redfish validator passed.
2. PATCH the session time out property using the below command

PATCH -d '{"SessionTimeout": 100}' https://<bmcip>/redfish/v1/SessionService

3. GET on sessionservice should return the value of time out which is
   patched by using the above command & also GET on the session service fails
   with Unauthorized error post the patched timeout value.
4. And also, the existing sessions that are open for the new timeout value are
   also closed.
5. As per the schema , the range of values that are allowed for
   session timeout are between 30 sec to 86400 sec, so any value which
   is patched out of the range is failed with an appropriate error message.
6. PATCH the session timeout to new value using 2, and them restart the bmcweb
   and the GET using 3 should return the new value.

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: Id50eacc5018b7a82371fd37a2ae1e7fb7596ed2b

1 files changed, 18 insertions, 1 deletions

diff --git a/include/persistent_data.hpp b/include/persistent_data.hpp
index 5d4661c503..03457c707f 100644
--- a/include/persistent_data.hpp
+++ b/include/persistent_data.hpp
@@ -112,6 +112,22 @@ class ConfigFile
                                 newSession->sessionToken, newSession);
                         }
                     }
+                    else if (item.key() == "timeout")
+                    {
+                        const int64_t* jTimeout =
+                            item.value().get_ptr<int64_t*>();
+                        if (jTimeout == nullptr)
+                        {
+                            BMCWEB_LOG_DEBUG
+                                << "Problem reading session timeout value";
+                            continue;
+                        }
+                        std::chrono::seconds sessionTimeoutInseconds(*jTimeout);
+                        BMCWEB_LOG_DEBUG << "Restored Session Timeout: "
+                                         << sessionTimeoutInseconds.count();
+                        SessionStore::getInstance().updateSessionTimeout(
+                            sessionTimeoutInseconds);
+                    }
                     else
                     {
                         // Do nothing in the case of extra fields.  We may have
@@ -157,7 +173,8 @@ class ConfigFile
             {"sessions", SessionStore::getInstance().authTokens},
             {"auth_config", SessionStore::getInstance().getAuthMethodsConfig()},
             {"system_uuid", systemUuid},
-            {"revision", jsonRevision}};
+            {"revision", jsonRevision},
+            {"timeout", SessionStore::getInstance().getTimeoutInSeconds()}};
         persistentFile << data;
     }