X2AP: init funcs (register/association) + handler/management functions
SCTP: one to many sockets implementation
This commit is contained in:
Konstantinos Alexandris
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/*
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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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#include <stdint.h>
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#include "queue.h"
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#include "tree.h"
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#include "sctp_eNB_defs.h"
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#ifndef X2AP_ENB_DEFS_H_
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#define X2AP_ENB_DEFS_H_
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#define X2AP_ENB_NAME_LENGTH_MAX (150)
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typedef enum {
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/* Disconnected state: initial state for any association. */
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X2AP_ENB_STATE_DISCONNECTED = 0x0,
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/* State waiting for x2 Setup response message if the target eNB accepts or
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* X2 Setup failure if rejects the eNB.
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*/
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X2AP_ENB_STATE_WAITING = 0x1,
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/* The eNB is successfully connected to another eNB. */
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X2AP_ENB_STATE_CONNECTED = 0x2,
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/* X2AP is ready, and the eNB is successfully connected to another eNB. */
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X2AP_ENB_STATE_READY = 0x3,
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X2AP_ENB_STATE_OVERLOAD = 0x4,
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X2AP_ENB_STATE_RESETTING = 0x5,
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/* Max number of states available */
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X2AP_ENB_STATE_MAX,
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} x2ap_eNB_state_t;
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/* Served PLMN identity element */
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struct plmn_identity_s {
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uint16_t mcc;
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uint16_t mnc;
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uint8_t mnc_digit_length;
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STAILQ_ENTRY(plmn_identity_s) next;
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};
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/* Served group id element */
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struct served_group_id_s {
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uint16_t enb_group_id;
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STAILQ_ENTRY(served_group_id_s) next;
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};
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/* Served enn code for a particular eNB */
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struct enb_code_s {
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uint8_t enb_code;
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STAILQ_ENTRY(enb_code_s) next;
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};
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struct x2ap_eNB_instance_s;
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/* This structure describes association of a eNB to another eNB */
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typedef struct x2ap_eNB_data_s {
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/* eNB descriptors tree, ordered by sctp assoc id */
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RB_ENTRY(x2ap_eNB_data_s) entry;
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/* This is the optional name provided by the MME */
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char *eNB_name;
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/* target eNB ID */
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uint32_t eNB_id;
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/* Current eNB load information (if any). */
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//x2ap_load_state_t overload_state;
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/* Current eNB->eNB X2AP association state */
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x2ap_eNB_state_t state;
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/* Next usable stream for UE signalling */
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int32_t nextstream;
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/* Number of input/ouput streams */
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uint16_t in_streams;
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uint16_t out_streams;
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/* Connexion id used between SCTP/X2AP */
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uint16_t cnx_id;
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/* SCTP association id */
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int32_t assoc_id;
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/* Only meaningfull in virtual mode */
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struct x2ap_eNB_instance_s *x2ap_eNB_instance;
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} x2ap_eNB_data_t;
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typedef struct x2ap_eNB_instance_s {
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/* used in simulation to store multiple eNB instances*/
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STAILQ_ENTRY(x2ap_eNB_instance_s) x2ap_eNB_entries;
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/* Number of target eNBs requested by eNB (tree size) */
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uint32_t x2_target_enb_nb;
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/* Number of target eNBs for which association is pending */
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uint32_t x2_target_enb_pending_nb;
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/* Number of target eNB successfully associated to eNB */
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uint32_t x2_target_enb_associated_nb;
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/* Tree of X2AP eNB associations ordered by association ID */
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RB_HEAD(x2ap_enb_map, x2ap_eNB_data_s) x2ap_enb_head;
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/* Tree of UE ordered by eNB_ue_x2ap_id's */
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// RB_HEAD(x2ap_ue_map, x2ap_eNB_ue_context_s) x2ap_ue_head;
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/* For virtual mode, mod_id as defined in the rest of the L1/L2 stack */
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instance_t instance;
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/* Displayable name of eNB */
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char *eNB_name;
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/* Unique eNB_id to identify the eNB within EPC.
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* In our case the eNB is a macro eNB so the id will be 20 bits long.
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* For Home eNB id, this field should be 28 bits long.
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*/
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uint32_t eNB_id;
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/* The type of the cell */
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cell_type_t cell_type;
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/* Tracking area code */
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uint16_t tac;
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/* Mobile Country Code
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* Mobile Network Code
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*/
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uint16_t mcc;
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uint16_t mnc;
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uint8_t mnc_digit_length;
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} x2ap_eNB_instance_t;
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typedef struct {
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/* List of served eNBs
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* Only used for virtual mode
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*/
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STAILQ_HEAD(x2ap_eNB_instances_head_s, x2ap_eNB_instance_s) x2ap_eNB_instances_head;
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/* Nb of registered eNBs */
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uint8_t nb_registered_eNBs;
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/* Generate a unique connexion id used between X2AP and SCTP */
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uint16_t global_cnx_id;
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} x2ap_eNB_internal_data_t;
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int x2ap_eNB_compare_assoc_id(struct x2ap_eNB_data_s *p1, struct x2ap_eNB_data_s *p2);
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/* Generate the tree management functions */
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struct x2ap_eNB_map;
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struct x2ap_eNB_data_s;
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RB_PROTOTYPE(x2ap_eNB_map, x2ap_eNB_data_s, entry, x2ap_eNB_compare_assoc_id);
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#endif /* X2AP_ENB_DEFS_H_ */
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