implemented the context metadata cleanup mechanism

Author: ayushman1210

src/common/context.c

@@ -261,3 +261,12 @@ void printConfig(FILE *outFile) {
     }
   }
 }
+
+void destroyContextMetadata(void) {
+  struct context_metadata *s, *tmp;
+  HASH_ITER(hh, ctx.metaMap, s, tmp) {
+    HASH_DEL(ctx.metaMap, s);
+    free(s);
+  }
+  ctx.metaMap = NULL;
+}

src/common/context.h

@@ -93,6 +93,14 @@ void createContextMetadata(const char *name, const char *printName,
                            context_source_t source, context_type_t type,
                            void *value, int isFlag);
 
+/*!
+ * Cleanup context metadata
+ *
+ * Free all allocated memory in the context metadata hash table.
+ * Call this when done using the context to prevent memory leaks.
+ */
+void destroyContextMetadata(void);
+
 void updateIntContext(const char *name, int value, context_source_t source);
 
 void updateCharContext(const char *name, const char *value,

src/sipnet/sipnet.c

@@ -1888,4 +1888,6 @@ void cleanupModel() {
     freeEventList();
     closeEventOutFile();
   }
+
+  destroyContextMetadata();
 }