From e72fa6aa39234a95c0f6ef68735109dd04984d6d Mon Sep 17 00:00:00 2001
From: Robert Schmidt <robert.schmidt@openairinterface.org>
Date: Thu, 15 Jun 2023 11:43:08 +0200
Subject: [PATCH] Implement F1 handlers

---
 openair2/LAYER2/NR_MAC_gNB/mac_rrc_ul_f1ap.c | 22 +++++++++++++++++++-
 openair2/RRC/NR/mac_rrc_dl_f1ap.c            | 21 +++++++++++++++----
 2 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/openair2/LAYER2/NR_MAC_gNB/mac_rrc_ul_f1ap.c b/openair2/LAYER2/NR_MAC_gNB/mac_rrc_ul_f1ap.c
index c3138c4a5c..c873c569e5 100644
--- a/openair2/LAYER2/NR_MAC_gNB/mac_rrc_ul_f1ap.c
+++ b/openair2/LAYER2/NR_MAC_gNB/mac_rrc_ul_f1ap.c
@@ -98,7 +98,27 @@ static void ue_context_modification_response_f1ap(const f1ap_ue_context_modif_re
 
 static void ue_context_modification_required_f1ap(const f1ap_ue_context_modif_required_t *required)
 {
-  AssertFatal(false, "%s() not implemented yet\n", __func__);
+  MessageDef *msg = itti_alloc_new_message(TASK_MAC_GNB, 0, F1AP_UE_CONTEXT_MODIFICATION_REQUIRED);
+  f1ap_ue_context_modif_required_t *f1ap_msg = &F1AP_UE_CONTEXT_MODIFICATION_REQUIRED(msg);
+  f1ap_msg->gNB_CU_ue_id = required->gNB_CU_ue_id;
+  f1ap_msg->gNB_DU_ue_id = required->gNB_DU_ue_id;
+  f1ap_msg->du_to_cu_rrc_information = NULL;
+  if (required->du_to_cu_rrc_information != NULL) {
+    f1ap_msg->du_to_cu_rrc_information = calloc(1, sizeof(*f1ap_msg->du_to_cu_rrc_information));
+    AssertFatal(f1ap_msg->du_to_cu_rrc_information != NULL, "out of memory\n");
+    du_to_cu_rrc_information_t *du2cu = f1ap_msg->du_to_cu_rrc_information;
+    AssertFatal(required->du_to_cu_rrc_information->cellGroupConfig != NULL && required->du_to_cu_rrc_information->cellGroupConfig_length > 0,
+                "cellGroupConfig is mandatory\n");
+    du2cu->cellGroupConfig_length = required->du_to_cu_rrc_information->cellGroupConfig_length;
+    du2cu->cellGroupConfig = malloc(du2cu->cellGroupConfig_length * sizeof(*du2cu->cellGroupConfig));
+    AssertFatal(du2cu->cellGroupConfig != NULL, "out of memory\n");
+    memcpy(du2cu->cellGroupConfig, required->du_to_cu_rrc_information->cellGroupConfig, du2cu->cellGroupConfig_length);
+    AssertFatal(required->du_to_cu_rrc_information->measGapConfig == NULL && required->du_to_cu_rrc_information->measGapConfig_length == 0, "not handled yet\n");
+    AssertFatal(required->du_to_cu_rrc_information->requestedP_MaxFR1 == NULL && required->du_to_cu_rrc_information->requestedP_MaxFR1_length == 0, "not handled yet\n");
+  }
+  f1ap_msg->cause = required->cause;
+  f1ap_msg->cause_value = required->cause_value;
+  itti_send_msg_to_task(TASK_DU_F1, 0, msg);
 }
 
 static void ue_context_release_request_f1ap(const f1ap_ue_context_release_req_t* req)
diff --git a/openair2/RRC/NR/mac_rrc_dl_f1ap.c b/openair2/RRC/NR/mac_rrc_dl_f1ap.c
index 3d554f80cc..40eea4861c 100644
--- a/openair2/RRC/NR/mac_rrc_dl_f1ap.c
+++ b/openair2/RRC/NR/mac_rrc_dl_f1ap.c
@@ -73,14 +73,27 @@ static void ue_context_modification_request_f1ap(const f1ap_ue_context_modif_req
 
 static void ue_context_modification_confirm_f1ap(const f1ap_ue_context_modif_confirm_t *confirm)
 {
-  (void)confirm;
-  AssertFatal(false, "%s() not implemented yet\n", __func__);
+  MessageDef *msg = itti_alloc_new_message(TASK_MAC_GNB, 0, F1AP_UE_CONTEXT_MODIFICATION_CONFIRM);
+  f1ap_ue_context_modif_confirm_t *f1ap_msg = &F1AP_UE_CONTEXT_MODIFICATION_CONFIRM(msg);
+  f1ap_msg->gNB_CU_ue_id = confirm->gNB_CU_ue_id;
+  f1ap_msg->gNB_DU_ue_id = confirm->gNB_DU_ue_id;
+  f1ap_msg->rrc_container = NULL;
+  f1ap_msg->rrc_container_length = 0;
+  if (confirm->rrc_container != NULL) {
+    f1ap_msg->rrc_container = calloc(1, sizeof(*f1ap_msg->rrc_container));
+    AssertFatal(f1ap_msg->rrc_container != NULL, "out of memory\n");
+    memcpy(f1ap_msg->rrc_container, confirm->rrc_container, confirm->rrc_container_length);
+    f1ap_msg->rrc_container_length = confirm->rrc_container_length;
+  }
+  itti_send_msg_to_task(TASK_CU_F1, 0, msg);
 }
 
 static void ue_context_modification_refuse_f1ap(const f1ap_ue_context_modif_refuse_t *refuse)
 {
-  (void)refuse;
-  AssertFatal(false, "%s() not implemented yet\n", __func__);
+  MessageDef *msg = itti_alloc_new_message(TASK_MAC_GNB, 0, F1AP_UE_CONTEXT_MODIFICATION_REFUSE);
+  f1ap_ue_context_modif_refuse_t *f1ap_msg = &F1AP_UE_CONTEXT_MODIFICATION_REFUSE(msg);
+  *f1ap_msg = *refuse;
+  itti_send_msg_to_task(TASK_CU_F1, 0, msg);
 }
 
 static void ue_context_release_command_f1ap(const f1ap_ue_context_release_cmd_t *cmd)