From 89c3f3e1c03dbe298a35311eb52d6cf289ff0051 Mon Sep 17 00:00:00 2001
From: mitmitmitm <ois@oasd8i.at>
Date: Tue, 29 Nov 2022 08:10:50 +0100
Subject: [PATCH] [UDM] Handle SDM unsubscribe

---
 src/udm/nudm-handler.c | 27 +++++++++++++++++++++++++++
 src/udm/nudm-handler.h |  2 ++
 src/udm/ue-sm.c        | 17 +++++++++++++++++
 3 files changed, 46 insertions(+)

diff --git a/src/udm/nudm-handler.c b/src/udm/nudm-handler.c
index b664841f9..aa9bb38be 100644
--- a/src/udm/nudm-handler.c
+++ b/src/udm/nudm-handler.c
@@ -561,3 +561,30 @@ bool udm_nudm_sdm_handle_subscription_create(
 
     return true;
 }
+
+bool udm_nudm_sdm_handle_subscription_delete(
+    udm_ue_t *udm_ue, ogs_sbi_stream_t *stream, ogs_sbi_message_t *recvmsg)
+{
+    ogs_sbi_message_t sendmsg;
+    ogs_sbi_response_t *response = NULL;
+    ogs_sbi_server_t *server = NULL;
+
+    ogs_assert(udm_ue);
+    ogs_assert(stream);
+    ogs_assert(recvmsg);
+
+    if (udm_ue->data_change_callback_uri) {
+        ogs_free(udm_ue->data_change_callback_uri);
+        udm_ue->data_change_callback_uri = NULL;
+    }
+
+    server = ogs_sbi_server_from_stream(stream);
+    ogs_assert(server);
+
+    memset(&sendmsg, 0, sizeof(sendmsg));
+    response = ogs_sbi_build_response(&sendmsg, OGS_SBI_HTTP_STATUS_NO_CONTENT);
+    ogs_assert(response);
+    ogs_sbi_server_send_response(stream, response);
+
+    return true;
+}
diff --git a/src/udm/nudm-handler.h b/src/udm/nudm-handler.h
index 803f26c71..581878cda 100644
--- a/src/udm/nudm-handler.h
+++ b/src/udm/nudm-handler.h
@@ -40,6 +40,8 @@ bool udm_nudm_sdm_handle_subscription_provisioned(
     udm_ue_t *udm_ue, ogs_sbi_stream_t *stream, ogs_sbi_message_t *recvmsg);
 bool udm_nudm_sdm_handle_subscription_create(
     udm_ue_t *udm_ue, ogs_sbi_stream_t *stream, ogs_sbi_message_t *recvmsg);
+bool udm_nudm_sdm_handle_subscription_delete(
+    udm_ue_t *udm_ue, ogs_sbi_stream_t *stream, ogs_sbi_message_t *recvmsg);
 
 #ifdef __cplusplus
 }
diff --git a/src/udm/ue-sm.c b/src/udm/ue-sm.c
index 3f321762d..24a375588 100644
--- a/src/udm/ue-sm.c
+++ b/src/udm/ue-sm.c
@@ -180,6 +180,23 @@ void udm_ue_state_operational(ogs_fsm_t *s, udm_event_t *e)
                             "Invalid resource name", message->h.method));
                 END
                 break;
+
+            CASE(OGS_SBI_HTTP_METHOD_DELETE)
+                SWITCH(message->h.resource.component[1])
+                CASE(OGS_SBI_RESOURCE_NAME_SDM_SUBSCRIPTIONS)
+                    udm_nudm_sdm_handle_subscription_delete(
+                            udm_ue, stream, message);
+                    break;
+
+                DEFAULT
+                    ogs_error("[%s] Invalid resource name [%s]",
+                            udm_ue->suci, message->h.resource.component[1]);
+                    ogs_assert(true ==
+                        ogs_sbi_server_send_error(stream,
+                            OGS_SBI_HTTP_STATUS_BAD_REQUEST, message,
+                            "Invalid resource name", message->h.method));
+                END
+                break;
             DEFAULT
                 ogs_error("[%s] Invalid HTTP method [%s]",
                         udm_ue->supi, message->h.method);