nr pdcp benchmarking: add skeleton optimized source files

Functions inside are to be filled with optimized versions of
ciphering and integrity. The program bench_optimized can be used
to test. (Note: other measures of computation time are possible,
this is just an example.)

openair2/LAYER2/nr_pdcp/bench/Makefile

@@ -4,9 +4,17 @@ CFLAGS=-Wall -g -I.
 OBJS=bench.o nr_pdcp_entity.o nr_pdcp_integrity_nia2.o nr_pdcp_security_nea2.o \
      nr_pdcp_sdu.o
 
+OBJS_optimized=bench.o nr_pdcp_entity.o nr_pdcp_integrity_nia2_optimized.o \
+     nr_pdcp_security_nea2_optimized.o nr_pdcp_sdu.o
+
+all: bench bench_optimized
+
 bench: $(OBJS)
 	$(CC) $(CFLAGS) -o $@ $(OBJS) -lcrypto -lnettle
 
+bench_optimized: $(OBJS_optimized)
+	$(CC) $(CFLAGS) -o $@ $(OBJS_optimized) -lcrypto -lnettle
+
 %.o: ../%.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 
@@ -14,4 +22,4 @@ bench: $(OBJS)
 	$(CC) $(CFLAGS) -c -o $@ $<
 
 clean:
-	rm -f bench $(OBJS)
+	rm -f bench $(OBJS) bench_optimized $(OBJS_optimized)

openair2/LAYER2/nr_pdcp/nr_pdcp_integrity_nia2_optimized.c

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (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.openairinterface.org/?page_id=698
+ *
+ * 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.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include "nr_pdcp_integrity_nia2.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <openssl/cmac.h>
+
+void *nr_pdcp_integrity_nia2_init(unsigned char *integrity_key)
+{
+  return NULL;
+}
+
+void nr_pdcp_integrity_nia2_integrity(void *integrity_context,
+                            unsigned char *out,
+                            unsigned char *buffer, int length,
+                            int bearer, int count, int direction)
+{
+}
+
+void nr_pdcp_integrity_nia2_free_integrity(void *integrity_context)
+{
+}

openair2/LAYER2/nr_pdcp/nr_pdcp_security_nea2_optimized.c

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (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.openairinterface.org/?page_id=698
+ *
+ * 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.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include "nr_pdcp_security_nea2.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <nettle/nettle-meta.h>
+#include <nettle/aes.h>
+#include <nettle/ctr.h>
+
+void *nr_pdcp_security_nea2_init(unsigned char *ciphering_key)
+{
+  return NULL;
+}
+
+void nr_pdcp_security_nea2_cipher(void *security_context,
+                                  unsigned char *buffer, int length,
+                                  int bearer, int count, int direction)
+{
+}
+
+void nr_pdcp_security_nea2_free_security(void *security_context)
+{
+}