1 files changed, 83 insertions, 0 deletions
diff --git a/ctrl/libhicnctrl/includes/hicn/ctrl/objects/subscription.h b/ctrl/libhicnctrl/includes/hicn/ctrl/objects/subscription.h
new file mode 100644
index 000000000..861341160
--- /dev/null
+++ b/ctrl/libhicnctrl/includes/hicn/ctrl/objects/subscription.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2021-2022 Cisco and/or its affiliates.
+ * 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.
+ */
+
+/**
+ * \file objects/subscription.h
+ * \brief Subscription.
+ */
+
+#ifndef HICNCTRL_OBJECTS_SUBSCRIPTION_H
+#define HICNCTRL_OBJECTS_SUBSCRIPTION_H
+
+#include <limits.h>
+#include <stddef.h>
+#include <hicn/ctrl/object_type.h>
+
+#undef PUNTING  // TODO(eloparco): Undefined to avoid collisions
+                // Fix the collision
+
+// Used only to create 'hc_topic_t'
+typedef struct {
+#define _(x) char x;
+  foreach_object_type
+#undef _
+} object_offset_t;
+
+// Flags for topic subscriptions
+typedef enum {
+#define _(x) TOPIC_##x = (1 << offsetof(object_offset_t, x)),
+  foreach_object_type
+#undef _
+      TOPIC_ALL = INT_MAX,
+} hc_topic_t;
+
+static inline hc_object_type_t object_from_topic(hc_topic_t topic) {
+#define _(x) \
+  if (topic == TOPIC_##x) return OBJECT_TYPE_##x;
+  foreach_object_type
+#undef _
+      return OBJECT_TYPE_UNDEFINED;
+}
+
+static inline hc_topic_t topic_from_object_type(hc_object_type_t object_type) {
+  if (object_type == OBJECT_TYPE_UNDEFINED) return TOPIC_ALL;
+#define _(x) \
+  if (object_type == OBJECT_TYPE_##x) return TOPIC_##x;
+  foreach_object_type
+#undef _
+      return TOPIC_UNDEFINED;
+}
+
+#define NUM_TOPICS OBJECT_TYPE_N  // Because a topic is created for each object
+#define ALL_TOPICS ~0
+
+// Subscriptions
+typedef uint32_t hc_topics_t;
+typedef struct {
+  hc_topics_t topics;
+} hc_subscription_t;
+
+#if 0
+typedef struct {
+  netdevice_type_t interface_type;
+} hc_event_interface_update_t;
+
+typedef struct {
+  ip_prefix_t prefix;
+  netdevice_type_t interface_type;
+} hc_event_active_interface_update_t;
+#endif
+
+#endif /* HICNCTRL_OBJECTS_SUBSCRIPTION_H */