Bartosz PodrygajloandRobert Schmidt
1ab8a58a2f
This commit refactors the TUN interface management by moving its creation and configuration from the PDCP layer to the SDAP layer for UE. Key changes include: - Introduced `tun_generate_ue_ifname` and `tun_destroy` functions for better TUN interface lifecycle management. - Added support for creating and destroying UE-specific TUN interfaces in SDAP. - Refactored `nr_pdcp_module_init` to remove TUN-related logic and moved it to SDAP. - Updated NAS and SDAP layers to handle PDU session-specific TUN interface creation and configuration. - Enhanced SDAP entity management to include TUN socket handling and thread lifecycle. - Updated NAS message handling to initialize default PDU session TUN interfaces in NOS1 mode. - Use a single SDAP thread function for gNB and UE - Allow noS1 mode also in SA on gNB These changes improve modularity by isolating TUN interface management within the SDAP layer, aligning with the 3GPP architecture, and simplifying the PDCP layer. Co-Authored-By: Robert Schmidt <robert.schmidt@openairinterface.org>
92 lines
3.3 KiB
C
92 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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* \param[in] fd file descriptor of the allocated interface
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*/
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void tun_destroy(const char *dev, int fd);
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#endif /*TUN_IF_H_*/
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