Guido Casati
844986ff92
* Close entity->pdusession_sock manually before pthread_join() to unblock sdap_tun_read_thread() * Update tun_destroy() to open a fresh socket for interface management, independent from the data socket * Fix check on success of change_interface_state() in tun_destroy(): is a boolean * Handle ENODEV error when bringing interface down: treat as success if the interface is already gone. * tun_destroy() is now handling INTERFACE_DOWN, so `INTERFACE_DOWN` in `tun_config()` is no longer needed
91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#ifndef TUN_IF_H_
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#define TUN_IF_H_
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#include <stdbool.h>
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#include <net/if.h>
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/*!
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* \brief This function generates the name of the interface based on the prefix and
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* the instance id.
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*
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* \param[in,out] ifname name of the interface
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* \param[in] ifprefix prefix of the interface
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* \param[in] instance_id unique instance number
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*/
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int tun_generate_ifname(char *ifname, const char *ifprefix, int instance_id);
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int tun_generate_ue_ifname(char *ifname, int instance_id, int pdu_session_id);
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/*!
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* \brief This function initializes the TUN interface
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* \param[in] ifname name of the interface
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* \param[in] instance_id unique instance number, used to save socket file descriptor
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*/
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int tun_init(const char *ifname, int instance_id);
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/*!
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* \brief This function initializes the TUN interface for MBMS
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* \param[in] ifname name of the interface
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*/
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int tun_init_mbms(char *ifname);
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/*!
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* \brief This function initializes the nasmesh interface using the basic values,
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* basic address, network mask and broadcast address, as the default configured
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* ones
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* \param[in] ifname name of the interface
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* \param[in] ipv4 IPv4 address of this interface as a string
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* \param[in] ipv6 IPv6 address of this interface as a string
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* \return true on success, otherwise false
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* \note
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* @ingroup _nas
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*/
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bool tun_config(const char* ifname, const char *ipv4, const char *ipv6);
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/*!
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* \brief Setup a IPv4 rule in table (interface_id - 1 + 10000) and route to
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* force packets coming into interface back through it, and workaround
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* net.ipv4.conf.all.rp_filter=2 (strict source filtering would filter out
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* responses of packets going out through interface to another IP address not
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* in same subnet).
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* \param[in] ifname name of the interface
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* \param[in] instance_id unique instance number, used to create the table
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* \param[in] ipv4 IPv4 address of the UE
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*/
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void setup_ue_ipv4_route(const char* ifname, int instance_id, const char *ipv4);
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/*!
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* \brief This function allocates a TUN interface
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* \param[in] dev name of the interface
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* \return file descriptor of the allocated interface
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*/
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int tun_alloc(const char *dev);
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/*!
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* \brief This function destroys the TUN interface
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* \param[in] dev name of the interface
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*/
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void tun_destroy(const char *dev);
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#endif /*TUN_IF_H_*/
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