Creating UL_ind RACH handle function in VNF

Also fixed a few bugs in nr-nFAPI:
- Push16->push8 fix in packing of RACH
- Allocating memory for pdu_list and preamble_list in unpack
- Properly indexing through both lists during unpack
- Created new nr_rach handling function

executables/nr-ue.c

@@ -145,32 +145,34 @@ void init_nrUE_standalone_thread(int ue_idx)
   pthread_setname_np(phy_thread, "oai:nrue-stand-phy");
 }
 
-static void L1_nsa_prach_procedures(nfapi_nr_rach_indication_t *rach_ind, frame_t frame, int slot)
+static void L1_nsa_prach_procedures(frame_t frame, int slot)
 {
-  rach_ind->sfn = frame;
-  rach_ind->slot = slot;
-  rach_ind->header.message_id = NFAPI_NR_PHY_MSG_TYPE_RACH_INDICATION;
+  nfapi_nr_rach_indication_t rach_ind;
+  memset(&rach_ind, 0, sizeof(rach_ind));
+  rach_ind.sfn = frame;
+  rach_ind.slot = slot;
+  rach_ind.header.message_id = NFAPI_NR_PHY_MSG_TYPE_RACH_INDICATION;
 
   uint8_t pdu_index = 0;
-  rach_ind->pdu_list = CALLOC(1, sizeof(*rach_ind->pdu_list));
-  rach_ind->number_of_pdus  = 1;
-	rach_ind->pdu_list[pdu_index].phy_cell_id                         = 0;
-	rach_ind->pdu_list[pdu_index].symbol_index                        = 0;
-	rach_ind->pdu_list[pdu_index].slot_index                          = slot;
-	rach_ind->pdu_list[pdu_index].freq_index                          = 1;
-	rach_ind->pdu_list[pdu_index].avg_rssi                            = 128;
-	rach_ind->pdu_list[pdu_index].avg_snr                             = 0xff; // invalid for now
-
-	rach_ind->pdu_list[pdu_index].num_preamble                        = 1;
-  const int num_p = rach_ind->pdu_list[pdu_index].num_preamble;
-  rach_ind->pdu_list[pdu_index].preamble_list = calloc(num_p, sizeof(nfapi_nr_prach_indication_preamble_t));
-	rach_ind->pdu_list[pdu_index].preamble_list[0].preamble_index     = 63; //Melissa, need to get this out of rrc_reconfig_msg
-	rach_ind->pdu_list[pdu_index].preamble_list[0].timing_advance     = 0;
-	rach_ind->pdu_list[pdu_index].preamble_list[0].preamble_pwr       = 0xffffffff;
-
-  send_nsa_standalone_msg(rach_ind);
-  free(rach_ind->pdu_list);
-  //free(rach_ind->pdu_list[pdu_index].preamble_list); Melissa hack maybe
+  rach_ind.pdu_list = CALLOC(1, sizeof(*rach_ind.pdu_list));
+  rach_ind.number_of_pdus  = 1;
+  rach_ind.pdu_list[pdu_index].phy_cell_id                         = 0;
+  rach_ind.pdu_list[pdu_index].symbol_index                        = 0;
+  rach_ind.pdu_list[pdu_index].slot_index                          = slot;
+  rach_ind.pdu_list[pdu_index].freq_index                          = 1;
+  rach_ind.pdu_list[pdu_index].avg_rssi                            = 128;
+  rach_ind.pdu_list[pdu_index].avg_snr                             = 0xff; // invalid for now
+
+  rach_ind.pdu_list[pdu_index].num_preamble                        = 1;
+  const int num_p = rach_ind.pdu_list[pdu_index].num_preamble;
+  rach_ind.pdu_list[pdu_index].preamble_list = calloc(num_p, sizeof(nfapi_nr_prach_indication_preamble_t));
+  rach_ind.pdu_list[pdu_index].preamble_list[0].preamble_index     = 63; //Melissa, need to get this out of rrc_reconfig_msg
+  rach_ind.pdu_list[pdu_index].preamble_list[0].timing_advance     = 0;
+  rach_ind.pdu_list[pdu_index].preamble_list[0].preamble_pwr       = 0xffffffff;
+
+  send_nsa_standalone_msg(&rach_ind);
+  free(rach_ind.pdu_list[pdu_index].preamble_list);
+  free(rach_ind.pdu_list);
 }
 
 static void *NRUE_phy_stub_standalone_pnf_task(void *arg)
@@ -224,9 +226,7 @@ static void *NRUE_phy_stub_standalone_pnf_task(void *arg)
 
     if (nr_prach == 1)
     {
-      nfapi_nr_rach_indication_t *ind = CALLOC(1, sizeof(*ind));
-      L1_nsa_prach_procedures(ind, ul_info.frame_tx, ul_info.slot_tx);
-      free(ind);
+      L1_nsa_prach_procedures(ul_info.frame_tx, ul_info.slot_tx);
       /* Fill rach indication here and send to proxy. Basically take pieces from
       L1_nr_prach_procedures() and send it to the proxy. prach from ue->gNb->gnb sends rach->ue receives rach
       The UE is basically filling the rach and proxy will receive and think that it came from the gNB. The

nfapi/oai_integration/nfapi_pnf.c

@@ -286,7 +286,7 @@ void *pnf_p7_thread_start(void *ptr) {
 }
 
 void *pnf_nr_p7_thread_start(void *ptr) {
-  NFAPI_TRACE(NFAPI_TRACE_INFO, "[PNF] P7 THREAD %s\n", __FUNCTION__);
+  NFAPI_TRACE(NFAPI_TRACE_INFO, "[NR_PNF] NR P7 THREAD %s\n", __FUNCTION__);
   pnf_set_thread_priority(79);
   nfapi_pnf_p7_config_t *config = (nfapi_pnf_p7_config_t *)ptr;
   nfapi_nr_pnf_p7_start(config);

nfapi/oai_integration/nfapi_vnf.c

@@ -47,6 +47,7 @@
 
 extern RAN_CONTEXT_t RC;
 extern UL_RCC_IND_t  UL_RCC_INFO;
+extern NR_UL_IND_t UL_INFO;
 
 typedef struct {
   uint8_t enabled;
@@ -699,6 +700,32 @@ int phy_rach_indication(struct nfapi_vnf_p7_config *config, nfapi_rach_indicatio
   return 1;
 }
 
+int phy_nr_rach_indication(struct nfapi_vnf_p7_config *config, nfapi_nr_rach_indication_t *ind)
+{
+  if(NFAPI_MODE == NFAPI_MODE_VNF)
+  {
+    for (int i = 0; i < ind->number_of_pdus; i++) {
+      LOG_I(NR_MAC, "%s() NFAPI SFN:%d/SLOT:%d number_of_preambles:%u\n", __FUNCTION__, ind->sfn, ind->slot, ind->pdu_list[i].num_preamble);
+
+      UL_INFO.rach_ind = *ind;
+
+      const int num_p = ind->pdu_list[i].num_preamble;
+      if (num_p > 0)
+      {
+        UL_INFO.rach_ind.pdu_list[i].preamble_list = calloc(num_p, sizeof(nfapi_nr_prach_indication_preamble_t));
+        for (int j = 0; j < num_p; j++)
+        {
+          UL_INFO.rach_ind.pdu_list[i].preamble_list[j] = ind->pdu_list[i].preamble_list[j];
+        }
+      }
+    }
+  }
+  else {
+    LOG_E(NR_MAC, "NFAPI_MODE = %d not NFAPI_MODE_VNF(2)\n", nfapi_getmode());
+  }
+  return 1;
+}
+
 int phy_harq_indication(struct nfapi_vnf_p7_config *config, nfapi_harq_indication_t *ind) {
   struct PHY_VARS_eNB_s *eNB = RC.eNB[0][0];
   LOG_D(MAC, "%s() NFAPI SFN/SF:%d number_of_harqs:%u\n", __FUNCTION__, NFAPI_SFNSF2DEC(ind->sfn_sf), ind->harq_indication_body.number_of_harqs);
@@ -1147,11 +1174,10 @@ void *vnf_nr_p7_thread_start(void *ptr) {
   p7_vnf->config->port = p7_vnf->local_port;
   p7_vnf->config->sync_indication = &phy_sync_indication;
   p7_vnf->config->slot_indication = &phy_slot_indication;
-
   p7_vnf->config->harq_indication = &phy_harq_indication;
   p7_vnf->config->crc_indication = &phy_crc_indication;
   p7_vnf->config->rx_indication = &phy_rx_indication;
-  p7_vnf->config->rach_indication = &phy_rach_indication;
+  p7_vnf->config->nr_rach_indication = &phy_nr_rach_indication;
   p7_vnf->config->srs_indication = &phy_srs_indication;
   p7_vnf->config->sr_indication = &phy_sr_indication;
   p7_vnf->config->cqi_indication = &phy_cqi_indication;
@@ -1532,6 +1558,7 @@ void configure_nr_nfapi_vnf(char *vnf_addr, int vnf_p5_port) {
   config->codec_config.allocate = &vnf_allocate;
   config->codec_config.deallocate = &vnf_deallocate;
   memset(&UL_RCC_INFO,0,sizeof(UL_RCC_IND_t));
+  memset(&UL_INFO, 0, sizeof(NR_UL_IND_t));
   NFAPI_TRACE(NFAPI_TRACE_INFO, "[VNF] Creating VNF NFAPI start thread %s\n", __FUNCTION__);
   pthread_create(&vnf_start_pthread, NULL, (void *)&vnf_nr_start_thread, config);
   NFAPI_TRACE(NFAPI_TRACE_INFO, "[VNF] Created VNF NFAPI start thread %s\n", __FUNCTION__);

nfapi/open-nFAPI/nfapi/src/nfapi_p7.c

@@ -3522,7 +3522,7 @@ static uint8_t pack_nr_rach_indication(void *msg, uint8_t **ppWritePackedMsg, ui
 
 	if (!(push16(pNfapiMsg->sfn , ppWritePackedMsg, end) &&
 		push16(pNfapiMsg->slot , ppWritePackedMsg, end) &&
-		push16(pNfapiMsg->number_of_pdus, ppWritePackedMsg, end)
+		push8(pNfapiMsg->number_of_pdus, ppWritePackedMsg, end)
 		))
 			return 0;
 
@@ -6502,9 +6502,11 @@ return 1;
 
 //NR RACH
 
-static uint8_t unpack_nr_rach_indication_body(void* tlv, uint8_t **ppReadPackedMsg, uint8_t *end)
+static uint8_t unpack_nr_rach_indication_body(nfapi_nr_prach_indication_pdu_t* value,
+                                              uint8_t **ppReadPackedMsg,
+                                              uint8_t *end,
+                                              nfapi_p7_codec_config_t* config)
 {
-	nfapi_nr_prach_indication_pdu_t* value = (nfapi_nr_prach_indication_pdu_t*)tlv;
 
 	if(!(pull16(ppReadPackedMsg, &value->phy_cell_id, end) &&
 	 	 pull8(ppReadPackedMsg, &value->symbol_index, end) &&
@@ -6515,14 +6517,18 @@ static uint8_t unpack_nr_rach_indication_body(void* tlv, uint8_t **ppReadPackedM
 		 pull8(ppReadPackedMsg, &value->num_preamble, end)
 		 ))
 		  return 0;
+
+        if (value->num_preamble > 0) {
+	        value->preamble_list = nfapi_p7_allocate(sizeof(*value->preamble_list) * value->num_preamble, config);
                 for(int i = 0; i < value->num_preamble; i++)
                 {
-		if(!(pull8(ppReadPackedMsg, &value->preamble_list->preamble_index, end) &&
-			pull16(ppReadPackedMsg, &value->preamble_list->timing_advance, end) &&
-			pull32(ppReadPackedMsg, &value->preamble_list->preamble_pwr, end)
+                        if(!(pull8(ppReadPackedMsg, &value->preamble_list[i].preamble_index, end) &&
+                                pull16(ppReadPackedMsg, &value->preamble_list[i].timing_advance, end) &&
+                                pull32(ppReadPackedMsg, &value->preamble_list[i].preamble_pwr, end)
                                 ))
                                 return 0;
                 }
+        }
 	return 1;
 }
 
@@ -6535,13 +6541,15 @@ static uint8_t unpack_nr_rach_indication(uint8_t **ppReadPackedMsg, uint8_t *end
 		))
 		return 0;
 
-	for(int i=0; i< pNfapiMsg->number_of_pdus;i++)	
+        if (pNfapiMsg->number_of_pdus > 0) {
+	        pNfapiMsg->pdu_list = nfapi_p7_allocate(sizeof(*pNfapiMsg->pdu_list) * pNfapiMsg->number_of_pdus, config);
+                for(int i = 0; i < pNfapiMsg->number_of_pdus; i++)
                 {
-		if(!unpack_nr_rach_indication_body(&pNfapiMsg->pdu_list,ppReadPackedMsg,end))
+                        if(!unpack_nr_rach_indication_body(&pNfapiMsg->pdu_list[i], ppReadPackedMsg, end, config))
                                 return 0;
                 }
-
-return 1;
+        }
+        return 1;
 }
 
 //NR UCI 

nfapi/open-nFAPI/vnf/public_inc/nfapi_vnf_interface.h

@@ -760,6 +760,20 @@ typedef struct nfapi_vnf_p7_config
 	 */
 	int (*rach_indication)(struct nfapi_vnf_p7_config* config, nfapi_rach_indication_t* ind);
 
+        /*! A callback for the RACH.indication
+     *  \param config A pointer to the vnf p7 configuration
+	 *  \param ind A data structure for the decoded nrRACH.indication This will
+	 *              have been allocated on the stack.
+	 *  \return not currently used.
+	 *
+	 *  The ind may contain pointers to dyanmically allocated sub structures
+	 *  such as the pdu. The dyanmically allocated structure will
+	 *  be deallocated on return. If the client wishes to 'keep' the structures
+	 *  then the substructure pointers should be set to 0 and then the client should
+	 *  use the codec_config.deallocate function to release it at a future point
+	 */
+	int (*nr_rach_indication)(struct nfapi_vnf_p7_config* config, nfapi_nr_rach_indication_t* ind);
+
 	/*! A callback for the SRS.indication
      *  \param config A pointer to the vnf p7 configuration
 	 *  \param ind A data structure for the decoded SRS.indication This will

nfapi/open-nFAPI/vnf/src/vnf_p7.c

@@ -1547,14 +1547,22 @@ void vnf_handle_nr_rach_indication(void *pRecvMsg, int recvMsgLen, vnf_p7_t* vnf
 	}
 	else
 	{
-		NFAPI_TRACE(NFAPI_TRACE_INFO, "Melissa %s: HANDLING RACH IND\n", __FUNCTION__);
 		nfapi_nr_rach_indication_t ind;
 	
 		if(nfapi_nr_p7_message_unpack(pRecvMsg, recvMsgLen, &ind, sizeof(ind), &vnf_p7->_public.codec_config) < 0)
 		{
 			NFAPI_TRACE(NFAPI_TRACE_ERROR, "%s: Failed to unpack message\n", __FUNCTION__);
 		}
-		
+		else
+		{
+		        NFAPI_TRACE(NFAPI_TRACE_INFO, "%s: Handling RACH Indication\n", __FUNCTION__);
+			if(vnf_p7->_public.nr_rach_indication)
+			{
+				(vnf_p7->_public.nr_rach_indication)(&vnf_p7->_public, &ind);
+			}
+		}
+		//vnf_p7_codec_free(vnf_p7, ind.nr_rach_indication_body.preamble_list); Melissa do we need to do this?
+		//vnf_p7_codec_free(vnf_p7, ind.vendor_extension);
 	}
 }
 

openair1/PHY/phy_vars.h

@@ -24,6 +24,7 @@
 
 #include "PHY/types.h"
 #include "PHY/defs_eNB.h"
+#include "PHY/defs_gNB.h"
 #include "PHY/defs_UE.h"
 #include "common/ran_context.h"
 
@@ -45,6 +46,7 @@ int16_t *primary_synch2_time;
 PHY_VARS_UE ***PHY_vars_UE_g;
 RAN_CONTEXT_t RC;
 UL_RCC_IND_t UL_RCC_INFO;
+NR_UL_IND_t UL_INFO;
 
 unsigned short rev[2048],rev_times4[8192],rev_half[1024];
 unsigned short rev256[256],rev512[512],rev1024[1024],rev4096[4096],rev2048[2048],rev8192[8192];

openair2/NR_PHY_INTERFACE/NR_IF_Module.c

@@ -52,26 +52,28 @@ extern int oai_nfapi_rx_ind(nfapi_rx_indication_t *ind);
 extern uint8_t nfapi_mode;
 extern uint16_t sf_ahead;
 extern uint16_t sl_ahead;
+extern NR_UL_IND_t UL_INFO;
 
 void handle_nr_rach(NR_UL_IND_t *UL_info) {
 
-  if (UL_info->rach_ind.number_of_pdus>0) {
-    LOG_I(MAC,"Melissa UL_info[Frame %d, Slot %d] Calling initiate_ra_proc RACH:SFN/SLOT:%d/%d\n",UL_info->frame,UL_info->slot, UL_info->rach_ind.sfn,UL_info->rach_ind.slot);
-    int npdus = UL_info->rach_ind.number_of_pdus;
+  if (UL_INFO.rach_ind.number_of_pdus>0) {
+    LOG_I(MAC,"Melissa UL_INFO[Frame %d, Slot %d] Calling initiate_ra_proc RACH:SFN/SLOT:%d/%d\n",
+          UL_INFO.frame,UL_INFO.slot, UL_INFO.rach_ind.sfn,UL_INFO.rach_ind.slot);
+    int npdus = UL_INFO.rach_ind.number_of_pdus;
     for(int i = 0; i < npdus; i++) {
-      UL_info->rach_ind.number_of_pdus--;
-      if (UL_info->rach_ind.pdu_list[i].num_preamble>0)
-      AssertFatal(UL_info->rach_ind.pdu_list[i].num_preamble==1,
+      UL_INFO.rach_ind.number_of_pdus--;
+      if (UL_INFO.rach_ind.pdu_list[i].num_preamble>0)
+      AssertFatal(UL_INFO.rach_ind.pdu_list[i].num_preamble==1,
                   "More than 1 preamble not supported\n");
     
-      nr_initiate_ra_proc(UL_info->module_id,
-                          UL_info->CC_id,
-                          UL_info->rach_ind.sfn,
-                          UL_info->rach_ind.slot,
-                          UL_info->rach_ind.pdu_list[i].preamble_list[0].preamble_index,
-                          UL_info->rach_ind.pdu_list[i].freq_index,
-                          UL_info->rach_ind.pdu_list[i].symbol_index,
-                          UL_info->rach_ind.pdu_list[i].preamble_list[0].timing_advance);
+      nr_initiate_ra_proc(UL_INFO.module_id,
+                          UL_INFO.CC_id,
+                          UL_INFO.rach_ind.sfn,
+                          UL_INFO.rach_ind.slot,
+                          UL_INFO.rach_ind.pdu_list[i].preamble_list[0].preamble_index,
+                          UL_INFO.rach_ind.pdu_list[i].freq_index,
+                          UL_INFO.rach_ind.pdu_list[i].symbol_index,
+                          UL_INFO.rach_ind.pdu_list[i].preamble_list[0].timing_advance);
     }
   }
 }

openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c

@@ -131,8 +131,14 @@ void send_nsa_standalone_msg(nfapi_nr_rach_indication_t *rach_ind)
 {
     char buffer[NFAPI_MAX_PACKED_MESSAGE_SIZE];
     int encoded_size = nfapi_nr_p7_message_pack(rach_ind, buffer, sizeof(buffer), NULL);
-    LOG_I(NR_MAC, "NR_RACH_IND sent to Proxy, Size: %d Frame %d Subframe %d\n", encoded_size,
-          rach_ind->sfn, rach_ind->slot);
+    if (encoded_size <= 0)
+    {
+        LOG_E(NR_MAC, "nfapi_nr_p7_message_pack has failed. Encoded size = %d\n", encoded_size);
+        return;
+    }
+
+    LOG_I(NR_MAC, "NR_RACH_IND sent to Proxy, Size: %d Frame %d Slot %d Num PDUS %d\n", encoded_size,
+          rach_ind->sfn, rach_ind->slot, rach_ind->number_of_pdus);
     if (send(ue_tx_sock_descriptor, buffer, encoded_size, 0) < 0)
     {
         LOG_E(NR_MAC, "Send Proxy NR_UE failed\n");