import NFAPI work from David Price from Cisco (non-working commit, do not use it)

It has been chosen to not include the full history of commits
from David. He included a binary version of wireshark, probably
a modified one that understands NFAPI. Wireshark is released under
the GPL license, we cannot include it in the repository. We could
have done a next commit to remove this binary. But then it would
still be present in the history of commits, which may not be allowed.
And it would take space on disk. We could edit the history to remove
wireshark entirely. But this operation is too complicated.

There was also a pcap capture file, which has nothing to do in
the history of commits and would take space on disk. There again,
it's too difficult to edit the history to remove it.

There was a file .gitignore that was also removed.

The original history can be found on David's repository:
https://gitlab.eurecom.fr/daveprice/openairinterface5g/
The branch is: nfapi-ru-rau-split.

A copy of that branch has been included in the internal OAI
repository, for those who have access to it.
The branch is the same. The last commit ID is
9106438239e0bc626ff1fa1d97d911caadd0fbb9.

You can compare the current commit with the commit 9106...
to see what differs.

The current commit has to be considered non-working.
The commit following the current commit will fix problems with
the work in the current commit.

If you use git bisect, don't spend time analyzing the current
commit.

nfapi/oai_integration/nfapi.c

@@ -0,0 +1,51 @@
+/*
+ * 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 <stdio.h>
+#include <pthread.h>
+
+void set_thread_priority(int priority)
+{
+  //printf("%s(priority:%d)\n", __FUNCTION__, priority);
+
+  pthread_attr_t ptAttr;
+
+  struct sched_param schedParam;
+  schedParam.__sched_priority = priority; //79;
+  if(sched_setscheduler(0, SCHED_RR, &schedParam) != 0)
+  {
+    printf("Failed to set scheduler to SCHED_RR\n");
+  }
+
+  if(pthread_attr_setschedpolicy(&ptAttr, SCHED_RR) != 0)
+  {
+    printf("Failed to set pthread sched policy SCHED_RR\n");
+  }
+
+  pthread_attr_setinheritsched(&ptAttr, PTHREAD_EXPLICIT_SCHED);
+
+  struct sched_param thread_params;
+  thread_params.sched_priority = 20;
+  if(pthread_attr_setschedparam(&ptAttr, &thread_params) != 0)
+  {
+    printf("failed to set sched param\n");
+  }
+}

nfapi/oai_integration/nfapi_pnf.h

@@ -0,0 +1,27 @@
+/*
+ * 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
+ */
+
+#if !defined(NFAPI_PNF_H__)
+#define NFAPI_PNF_H__
+
+void configure_nfapi_pnf(char *vnf_ip_addr, int vnf_p5_port, char *pnf_ip_addr, int pnf_p7_port, int vnf_p7_port);
+
+#endif

nfapi/oai_integration/nfapi_vnf.h

@@ -0,0 +1,27 @@
+/*
+ * 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
+ */
+
+#if !defined(NFAPI_VNF_H__)
+#define NFAPI_VNF_H__
+
+void configure_nfapi_vnf(char *vnf_addr, int vnf_p5_port);
+
+#endif

nfapi/oai_integration/vendor_ext.h

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2017 Cisco Systems, Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ * 
+ * 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.
+ */
+
+#ifndef _VENDOR_EXT_H_
+#define _VENDOR_EXT_H_
+
+#include "nfapi_interface.h"
+
+typedef enum {
+	P5_VENDOR_EXT_REQ = NFAPI_VENDOR_EXT_MSG_MIN,
+	P5_VENDOR_EXT_RSP,
+
+	P7_VENDOR_EXT_REQ,
+	P7_VENDOR_EXT_IND
+
+} vendor_ext_message_id_e;
+
+typedef struct {
+	nfapi_p4_p5_message_header_t header;
+	uint16_t dummy1;
+	uint16_t dummy2;
+} vendor_ext_p5_req;
+
+typedef struct {
+	nfapi_p4_p5_message_header_t header;
+	uint16_t error_code;
+} vendor_ext_p5_rsp;
+
+typedef struct {
+	nfapi_p7_message_header_t header;
+	uint16_t dummy1;
+	uint16_t dummy2;
+} vendor_ext_p7_req;
+
+typedef struct {
+	nfapi_p7_message_header_t header;
+	uint16_t error_code;
+} vendor_ext_p7_ind;
+
+typedef struct {
+	nfapi_tl_t tl;
+	uint32_t dummy;
+} vendor_ext_tlv_1;
+
+#define VENDOR_EXT_TLV_1_TAG 0xF001
+
+typedef struct {
+	nfapi_tl_t tl;
+	uint32_t dummy;
+} vendor_ext_tlv_2;
+
+#define VENDOR_EXT_TLV_2_TAG 0xF002
+
+#endif // _VENDOR_EXT_