Create tun_if module for TUN interface handling

Move openair3/RRC/NAS/nas_config.c to common/utils/tun_if.c, and remove the former from all targets.
2024-08-02 15:31:04 +02:00
parent 39e7839f19
commit 89d89a7564
12 changed files with 32 additions and 40 deletions
@@ -0,0 +1,57 @@
+/*
+ * 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
+ */
+
+#ifndef TUN_IF_H_
+#define TUN_IF_H_
+
+#include <stdbool.h>
+
+/*! \fn int  tun_config(char*, int, int)
+ * \brief This function initializes the nasmesh interface using the basic values,
+ * basic address, network mask and broadcast address, as the default configured
+ * ones
+ * \param[in] interface_id number of this interface, prepended after interface
+ * name
+ * \param[in] ipv4 IPv4 address of this interface as a string
+ * \param[in] ipv6 IPv6 address of this interface as a string
+ * \param[in] ifprefix interface name prefix to which an interface number will
+ * be appended
+ * \return true on success, otherwise false
+ * \note
+ * @ingroup  _nas
+ */
+bool tun_config(int interface_id, const char *ipv4, const char *ipv6, const char *ifprefix);
+
+/*!
+ * \brief Setup a IPv4 rule in table (interface_id - 1 + 10000) and route to
+ * force packets coming into interface back through it, and workaround
+ * net.ipv4.conf.all.rp_filter=2 (strict source filtering would filter out
+ * responses of packets going out through interface to another IP address not
+ * in same subnet).
+ * \param[in] interface_id number of this interface, prepended after interface
+ * name
+ * \param[in] ipv4 IPv4 address of the UE
+ * \param[in] ifprefix interface name prefix to which an interface number will
+ * be appended
+ */
+void setup_ue_ipv4_route(int interface_id, const char *ipv4, const char *ifpref);
+
+#endif /*TUN_IF_H_*/