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open5gs/src/pgw/pgw-context.h

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/*
* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
*
* This file is part of Open5GS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef PGW_CONTEXT_H
#define PGW_CONTEXT_H
#include "pgw-config.h"
#if HAVE_NET_IF_H
#include <net/if.h>
#endif
#include "ogs-gtp.h"
#include "ogs-diameter-gx.h"
#include "ogs-app.h"
#ifdef __cplusplus
extern "C" {
#endif
#define MAX_NUM_OF_DEV 16
#define MAX_NUM_OF_SUBNET 16
extern int __pgw_log_domain;
#undef OGS_LOG_DOMAIN
#define OGS_LOG_DOMAIN __pgw_log_domain
typedef struct pgw_context_s {
const char* diam_conf_path; /* PGW Diameter conf path */
ogs_diam_config_t *diam_config; /* PGW Diameter config */
uint32_t gtpc_port; /* Default: PGW GTP-C local port */
uint32_t gtpu_port; /* Default: PGW GTP-U local port */
const char *tun_ifname; /* Default: ogstun */
ogs_list_t gtpc_list; /* PGW GTPC IPv4 Server List */
ogs_list_t gtpc_list6; /* PGW GTPC IPv6 Server List */
ogs_sock_t *gtpc_sock; /* PGW GTPC IPv4 Socket */
ogs_sock_t *gtpc_sock6; /* PGW GTPC IPv6 Socket */
ogs_sockaddr_t *gtpc_addr; /* PGW GTPC IPv4 Address */
ogs_sockaddr_t *gtpc_addr6; /* PGW GTPC IPv6 Address */
ogs_list_t gtpu_list; /* PGW GTPU IPv4 Server List */
ogs_list_t gtpu_list6; /* PGW GTPU IPv6 Server List */
ogs_sock_t *gtpu_sock; /* PGW GTPU IPv4 Socket */
ogs_sock_t *gtpu_sock6; /* PGW GTPU IPv6 Socket */
ogs_sockaddr_t *gtpu_addr; /* PGW GTPU IPv4 Address */
ogs_sockaddr_t *gtpu_addr6; /* PGW GTPU IPv6 Address */
ogs_list_t dev_list; /* PGW Tun Device List */
ogs_list_t subnet_list; /* PGW UE Subnet List */
ogs_queue_t *queue; /* Queue for processing PGW control */
ogs_timer_mgr_t *timer_mgr; /* Timer Manager */
ogs_pollset_t *pollset; /* Poll Set for I/O Multiplexing */
#define MAX_NUM_OF_DNS 2
const char *dns[MAX_NUM_OF_DNS];
const char *dns6[MAX_NUM_OF_DNS];
#define MAX_NUM_OF_P_CSCF 16
const char *p_cscf[MAX_NUM_OF_P_CSCF];
int num_of_p_cscf;
int p_cscf_index;
const char *p_cscf6[MAX_NUM_OF_P_CSCF];
int num_of_p_cscf6;
int p_cscf6_index;
ogs_list_t sgw_s5c_list; /* SGW GTPC Node List */
ogs_list_t sgw_s5u_list; /* SGW GTPU Node List */
ogs_list_t ip_pool_list;
ogs_hash_t *sess_hash; /* hash table (IMSI+APN) */
ogs_list_t sess_list;
} pgw_context_t;
typedef struct pgw_subnet_s pgw_subnet_t;
typedef struct pgw_ue_ip_s {
uint32_t addr[4];
bool static_ip;
/* Related Context */
pgw_subnet_t *subnet;
} pgw_ue_ip_t;
typedef struct pgw_dev_s {
ogs_lnode_t lnode;
char ifname[IFNAMSIZ];
ogs_socket_t fd;
ogs_sockaddr_t *link_local_addr;
ogs_poll_t *poll;
} pgw_dev_t;
typedef struct pgw_subnet_s {
ogs_lnode_t node;
ogs_ipsubnet_t sub; /* Subnet : cafe::0/64 */
ogs_ipsubnet_t gw; /* Gateway : cafe::1 */
char apn[OGS_MAX_APN_LEN]; /* APN : "internet", "volte", .. */
#define MAX_NUM_OF_SUBNET_RANGE 16
struct {
#if 0
ogs_ipsubnet_t low, high;
#else
const char *low;
const char *high;
#endif
} range[MAX_NUM_OF_SUBNET_RANGE];
int num_of_range;
int family; /* AF_INET or AF_INET6 */
uint8_t prefixlen; /* prefixlen */
OGS_POOL(pool, pgw_ue_ip_t);
pgw_dev_t *dev; /* Related Context */
} pgw_subnet_t;
typedef struct pgw_sess_s {
ogs_lnode_t lnode;
uint32_t index; /**< An index of this node */
uint32_t pgw_s5c_teid; /* PGW-S5C-TEID is derived from INDEX */
uint32_t sgw_s5c_teid; /* SGW-S5C-TEID is received from SGW */
char *gx_sid; /* Gx Session ID */
/* IMSI */
uint8_t imsi[OGS_MAX_IMSI_LEN];
int imsi_len;
char imsi_bcd[OGS_MAX_IMSI_BCD_LEN+1];
/* APN Configuration */
ogs_pdn_t pdn;
pgw_ue_ip_t* ipv4;
pgw_ue_ip_t* ipv6;
/* User-Lication-Info */
ogs_tai_t tai;
ogs_e_cgi_t e_cgi;
uint8_t hash_keybuf[OGS_MAX_IMSI_LEN+OGS_MAX_APN_LEN+1];
int hash_keylen;
ogs_list_t bearer_list;
/* Related Context */
ogs_gtp_node_t *gnode;
} pgw_sess_t;
typedef struct pgw_bearer_s {
ogs_lnode_t lnode; /**< A node of list_t */
uint32_t index;
uint8_t ebi;
uint32_t pgw_s5u_teid; /* PGW_S5U is derived from INDEX */
uint32_t sgw_s5u_teid; /* SGW_S5U is received from SGW */
char *name; /* PCC Rule Name */
ogs_qos_t qos; /* QoS Infomration */
/* Packet Filter Identifier Generator(1~15) */
uint8_t pf_identifier;
/* Packet Filter List */
ogs_list_t pf_list;
pgw_sess_t *sess;
ogs_gtp_node_t *gnode;
} pgw_bearer_t;
typedef struct pgw_rule_s {
uint8_t proto;
ED5(uint8_t ipv4_local:1;,
uint8_t ipv4_remote:1;,
uint8_t ipv6_local:1;,
uint8_t ipv6_remote:1;,
uint8_t reserved:4;)
struct {
struct {
uint32_t addr[4];
uint32_t mask[4];
} local;
struct {
uint32_t addr[4];
uint32_t mask[4];
} remote;
} ip;
struct {
struct {
uint16_t low;
uint16_t high;
} local;
struct {
uint16_t low;
uint16_t high;
} remote;
} port;
} pgw_rule_t;
typedef struct pgw_pf_s {
ogs_lnode_t lnode;
ED3(uint8_t spare:2;,
uint8_t direction:2;,
uint8_t identifier:4;)
pgw_rule_t rule;
pgw_bearer_t *bearer;
} pgw_pf_t;
void pgw_context_init(void);
void pgw_context_final(void);
pgw_context_t *pgw_self(void);
int pgw_context_parse_config(void);
pgw_sess_t *pgw_sess_add_by_message(ogs_gtp_message_t *message);
pgw_sess_t *pgw_sess_add(
uint8_t *imsi, int imsi_len, char *apn,
uint8_t pdn_type, uint8_t ebi, ogs_paa_t *addr);
int pgw_sess_remove(pgw_sess_t *sess);
void pgw_sess_remove_all(void);
pgw_sess_t *pgw_sess_find(uint32_t index);
pgw_sess_t *pgw_sess_find_by_teid(uint32_t teid);
pgw_sess_t *pgw_sess_find_by_imsi_apn(uint8_t *imsi, int imsi_len, char *apn);
pgw_bearer_t *pgw_bearer_add(pgw_sess_t *sess);
int pgw_bearer_remove(pgw_bearer_t *bearer);
void pgw_bearer_remove_all(pgw_sess_t *sess);
pgw_bearer_t *pgw_bearer_find(uint32_t index);
pgw_bearer_t *pgw_bearer_find_by_pgw_s5u_teid(uint32_t pgw_s5u_teid);
pgw_bearer_t *pgw_bearer_find_by_ebi(pgw_sess_t *sess, uint8_t ebi);
pgw_bearer_t *pgw_bearer_find_by_name(pgw_sess_t *sess, char *name);
pgw_bearer_t *pgw_bearer_find_by_qci_arp(pgw_sess_t *sess,
uint8_t qci,
uint8_t priority_level,
uint8_t pre_emption_capability,
uint8_t pre_emption_vulnerability);
pgw_bearer_t *pgw_default_bearer_in_sess(pgw_sess_t *sess);
pgw_bearer_t *pgw_bearer_first(pgw_sess_t *sess);
pgw_bearer_t *pgw_bearer_next(pgw_bearer_t *bearer);
pgw_pf_t *pgw_pf_add(pgw_bearer_t *bearer, uint32_t precedence);
int pgw_pf_remove(pgw_pf_t *pf);
void pgw_pf_remove_all(pgw_bearer_t *bearer);
pgw_pf_t *pgw_pf_find_by_id(pgw_bearer_t *pgw_bearer, uint8_t id);
pgw_pf_t *pgw_pf_first(pgw_bearer_t *bearer);
pgw_pf_t *pgw_pf_next(pgw_pf_t *pf);
int pgw_ue_pool_generate(void);
pgw_ue_ip_t *pgw_ue_ip_alloc(int family, const char *apn, uint8_t *addr);
int pgw_ue_ip_free(pgw_ue_ip_t *ip);
pgw_dev_t *pgw_dev_add(const char *ifname);
int pgw_dev_remove(pgw_dev_t *dev);
void pgw_dev_remove_all(void);
pgw_dev_t *pgw_dev_find_by_ifname(const char *ifname);
pgw_dev_t *pgw_dev_first(void);
pgw_dev_t *pgw_dev_next(pgw_dev_t *dev);
pgw_subnet_t *pgw_subnet_add(
const char *ipstr, const char *mask_or_numbits,
const char *apn, const char *ifname);
pgw_subnet_t *pgw_subnet_next(pgw_subnet_t *subnet);
int pgw_subnet_remove(pgw_subnet_t *subnet);
void pgw_subnet_remove_all(void);
pgw_subnet_t *pgw_subnet_first(void);
pgw_subnet_t *gw_subnet_next(pgw_subnet_t *subnet);
void stats_add_session(void);
void stats_remove_session(void);
#ifdef __cplusplus
}
#endif
#endif /* PGW_CONTEXT_H */
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