Osmocom Home NodeB Gateway, for attaching femtocells to the 3G CN (OsmoMSC, OsmoSGSN) https://osmocom.org/projects/osmohnbgw
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#pragma once
#include <osmocom/core/select.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/write_queue.h>
#include <osmocom/core/timer.h>
#include <osmocom/sigtran/sccp_sap.h>
#include <osmocom/sigtran/osmo_ss7.h>
#include <osmocom/ctrl/control_if.h>
#define DEBUG
#include <osmocom/core/logging.h>
enum {
DMAIN,
DHNBAP,
DRUA,
DRANAP,
DMGW,
};
#define LOGHNB(x, ss, lvl, fmt, args ...) \
LOGP(ss, lvl, "%s " fmt, hnb_context_name(x), ## args)
enum hnb_ctrl_node {
CTRL_NODE_HNB = _LAST_CTRL_NODE,
_LAST_CTRL_NODE_HNB
};
#define HNBGW_LOCAL_IP_DEFAULT "0.0.0.0"
/* TODO: CS and PS now both connect to OsmoSTP, i.e. that's always going to be the same address. Drop the
* duplicity. */
#define HNBGW_IUCS_REMOTE_IP_DEFAULT "127.0.0.1"
#define HNBGW_IUPS_REMOTE_IP_DEFAULT "127.0.0.1"
/* 25.467 Section 7.1 */
#define IUH_DEFAULT_SCTP_PORT 29169
#define RNA_DEFAULT_SCTP_PORT 25471
#define IUH_PPI_RUA 19
#define IUH_PPI_HNBAP 20
#define IUH_PPI_SABP 31
#define IUH_PPI_RNA 42
#define IUH_PPI_PUA 55
#define IUH_MSGB_SIZE 2048
struct umts_cell_id {
uint16_t mcc; /*!< Mobile Country Code */
uint16_t mnc; /*!< Mobile Network Code */
uint16_t lac; /*!< Locaton Area Code */
uint16_t rac; /*!< Routing Area Code */
uint16_t sac; /*!< Service Area Code */
uint32_t cid; /*!< Cell ID */
};
struct hnb_gw;
enum hnbgw_cnlink_state {
/* we have just been initialized or were disconnected */
CNLINK_S_NULL,
/* establishment of the SUA/SCCP link is pending */
CNLINK_S_EST_PEND,
/* establishment of the SUA/SCCP link was confirmed */
CNLINK_S_EST_CONF,
/* we have esnt the RANAP RESET and wait for the ACK */
CNLINK_S_EST_RST_TX_WAIT_ACK,
/* we have received the RANAP RESET ACK and are active */
CNLINK_S_EST_ACTIVE,
};
struct hnbgw_cnlink {
struct llist_head list;
enum hnbgw_cnlink_state state;
struct hnb_gw *gw;
/* timer for re-transmitting the RANAP Reset */
struct osmo_timer_list T_RafC;
/* reference to the SCCP User SAP by which we communicate */
struct osmo_sccp_instance *sccp;
struct osmo_sccp_user *sccp_user;
uint32_t next_conn_id;
/* linked list of hnbgw_context_map */
struct llist_head map_list;
};
struct hnb_context {
/*! Entry in HNB-global list of HNB */
struct llist_head list;
/*! HNB-GW we are part of */
struct hnb_gw *gw;
/*! SCTP socket + write queue for Iuh to this specific HNB */
struct osmo_stream_srv *conn;
/*! copied from HNB-Identity-Info IE */
char identity_info[256];
/*! copied from Cell Identity IE */
struct umts_cell_id id;
/*! SCTP stream ID for HNBAP */
uint16_t hnbap_stream;
/*! SCTP stream ID for RUA */
uint16_t rua_stream;
/*! True if a HNB-REGISTER-REQ from this HNB has been accepted. Note that
* this entire data structure is freed if the HNB sends HNB-DE-REGISTER-REQ. */
bool hnb_registered;
/* linked list of hnbgw_context_map */
struct llist_head map_list;
};
struct ue_context {
/*! Entry in the HNB-global list of UE */
struct llist_head list;
/*! Unique Context ID for this UE */
uint32_t context_id;
char imsi[16+1];
uint32_t tmsi;
/*! UE is serviced via this HNB */
struct hnb_context *hnb;
};
struct hnb_gw {
struct {
const char *iuh_local_ip;
/*! SCTP port for Iuh listening */
uint16_t iuh_local_port;
/*! The UDP port where we receive multiplexed CS user
* plane traffic from HNBs */
uint16_t iuh_cs_mux_port;
const char *iucs_remote_addr_name;
const char *iups_remote_addr_name;
uint16_t rnc_id;
bool hnbap_allow_tmsi;
/*! print hnb-id (true) or MCC-MNC-LAC-RAC-SAC (false) in logs */
bool log_prefix_hnb_id;
struct mgcp_client_conf *mgcp_client;
} config;
/*! SCTP listen socket for incoming connections */
struct osmo_stream_srv_link *iuh;
/* list of struct hnb_context */
struct llist_head hnb_list;
/* list of struct ue_context */
struct llist_head ue_list;
/* next availble UE Context ID */
uint32_t next_ue_ctx_id;
struct ctrl_handle *ctrl;
/* currently active CN links for CS and PS */
struct {
struct osmo_sccp_instance *client;
struct hnbgw_cnlink *cnlink;
struct osmo_sccp_addr local_addr;
struct osmo_sccp_addr iucs_remote_addr;
struct osmo_sccp_addr iups_remote_addr;
} sccp;
struct mgcp_client *mgcp_client;
};
extern void *talloc_asn1_ctx;
struct hnb_context *hnb_context_by_id(struct hnb_gw *gw, uint32_t cid);
struct hnb_context *hnb_context_by_identity_info(struct hnb_gw *gw, const char *identity_info);
const char *hnb_context_name(struct hnb_context *ctx);
unsigned hnb_contexts(const struct hnb_gw *gw);
struct ue_context *ue_context_by_id(struct hnb_gw *gw, uint32_t id);
struct ue_context *ue_context_by_imsi(struct hnb_gw *gw, const char *imsi);
struct ue_context *ue_context_by_tmsi(struct hnb_gw *gw, uint32_t tmsi);
struct ue_context *ue_context_alloc(struct hnb_context *hnb, const char *imsi,
uint32_t tmsi);
void ue_context_free(struct ue_context *ue);
struct hnb_context *hnb_context_alloc(struct hnb_gw *gw, struct osmo_stream_srv_link *link, int new_fd);
void hnb_context_release(struct hnb_context *ctx);
void hnbgw_vty_init(struct hnb_gw *gw, void *tall_ctx);
int hnbgw_vty_go_parent(struct vty *vty);