Merge remote-tracking branch 'origin/fapi-stop-exchange' into integration_2025_w48 (!3561)

Implementation of STOP exchange

This implements the STOP.request/indication for all 3 transport mechanisms, the
VNF will send the STOP.request to the PNF, indicating it will disconnect, and
await a STOP.indication from the PNF

The WLS VNF is reworked to be able to start before the PNF, by calling call
rte_eal_init and rte_dev_probe to determine if dpdk has been initialized
properly, before calling rte_eal_init in the intended process when it is
appropriate to do so

openair2/GNB_APP/gnb_config.c

@@ -1356,6 +1356,18 @@ static void config_pdcp(configmodule_interface_t *cfg, nr_pdcp_configuration_t *
   pdcp_config->drb.discard_timer = config_get_processedint(cfg, &pdcp_params[CONFIG_NR_PDCP_DRB_DISCARD_TIMER_IDX]);
 }
 
+void nfapi_stop_l1()
+{
+  if (NFAPI_MODE && (NFAPI_MODE == NFAPI_MODE_AERIAL || NFAPI_MODE == NFAPI_MODE_VNF)) {
+    stop_nr_nfapi_vnf();
+  } else if (NFAPI_MODE && NFAPI_MODE == NFAPI_MODE_PNF) {
+    // PNF should just wait for the STOP.request to come from the L2
+    // If instead it was stopped first, in some cases it makes sense for it to terminate itself (WLS)
+    // Sends a STOP.indication to the VNF
+    stop_nr_nfapi_pnf();
+  }
+}
+
 static void get_bwp_config(nr_mac_config_t *configuration)
 {
   char path[MAX_OPTNAME_SIZE * 2 + 8];

openair2/GNB_APP/gnb_config.h

@@ -64,7 +64,7 @@ f1ap_gnb_du_system_info_t *get_sys_info(NR_BCCH_BCH_Message_t *mib, const NR_BCC
 int gNB_app_handle_f1ap_gnb_cu_configuration_update(f1ap_gnb_cu_configuration_update_t *gnb_cu_cfg_update);
 MessageDef *RCconfig_NR_CU_E1(const E1_t *entity);
 ngran_node_t get_node_type(void);
-
+void nfapi_stop_l1();
 #ifdef E2_AGENT
 #include "openair2/E2AP/e2_agent_arg.h"
 e2_agent_args_t RCconfig_NR_E2agent(void);