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#ifndef _GB_PROXY_H
#define _GB_PROXY_H
#include <osmocom/core/msgb.h>
#include <osmocom/gprs/gprs_ns.h>
#include <osmocom/vty/command.h>
#include <sys/types.h>
#include <regex.h>
struct rate_ctr_group;
enum gbproxy_patch_mode {
GBPROX_PATCH_DEFAULT,
GBPROX_PATCH_BSSGP, /*!< BSGGP messages only */
GBPROX_PATCH_LLC_ATTACH_REQ, /*!< BSSGP and Attach Request */
GBPROX_PATCH_LLC_ATTACH, /*!< BSSGP and Attach Request/Response */
GBPROX_PATCH_LLC_GMM, /*!< BSSGP and all GMM msgs */
GBPROX_PATCH_LLC_GSM, /*!< BSSGP and all GMM and GSM msgs */
GBPROX_PATCH_LLC, /*!< BSSGP and all supported LLC msgs */
};
struct gbproxy_config {
/* parsed from config file */
uint16_t nsip_sgsn_nsei;
/* misc */
struct gprs_ns_inst *nsi;
/* Linked list of all Gb peers (except SGSN) */
struct llist_head bts_peers;
/* Counter */
struct rate_ctr_group *ctrg;
/* force mcc/mnc */
int core_mnc;
int core_mcc;
uint8_t* core_apn;
size_t core_apn_size;
char * match_re;
enum gbproxy_patch_mode patch_mode;
int tlli_max_age;
int tlli_max_len;
/* IMSI checking/matching */
int check_imsi;
regex_t imsi_re_comp;
};
struct gbproxy_patch_state {
int local_mnc;
int local_mcc;
/* List of TLLIs for which patching is enabled */
struct llist_head enabled_tllis;
int enabled_tllis_count;
};
struct gbproxy_peer {
struct llist_head list;
/* point back to the config */
struct gbproxy_config *cfg;
/* NSEI of the peer entity */
uint16_t nsei;
/* BVCI used for Point-to-Point to this peer */
uint16_t bvci;
int blocked;
/* Routeing Area that this peer is part of (raw 04.08 encoding) */
uint8_t ra[6];
/* Counter */
struct rate_ctr_group *ctrg;
struct gbproxy_patch_state patch_state;
};
struct gbproxy_tlli_info {
struct llist_head list;
uint32_t tlli;
time_t timestamp;
uint8_t *mi_data;
size_t mi_data_len;
int enable_patching;
};
/* gb_proxy_vty .c */
int gbproxy_vty_init(void);
int gbproxy_parse_config(const char *config_file, struct gbproxy_config *cfg);
/* gb_proxy.c */
int gbproxy_init_config(struct gbproxy_config *cfg);
/* Main input function for Gb proxy */
int gbprox_rcvmsg(struct gbproxy_config *cfg, struct msgb *msg, uint16_t nsei, uint16_t ns_bvci, uint16_t nsvci);
int gbprox_signal(unsigned int subsys, unsigned int signal,
void *handler_data, void *signal_data);
/* Reset all persistent NS-VC's */
int gbprox_reset_persistent_nsvcs(struct gprs_ns_inst *nsi);
void gbprox_reset(struct gbproxy_config *cfg);
int gbprox_set_patch_filter(struct gbproxy_config *cfg, const char *filter,
const char **err_msg);
void gbprox_delete_tlli(struct gbproxy_peer *peer,
struct gbproxy_tlli_info *tlli_info);
int gbprox_remove_stale_tllis(struct gbproxy_peer *peer, time_t now);
int gbprox_cleanup_peers(struct gbproxy_config *cfg, uint16_t nsei, uint16_t bvci);
struct gbproxy_peer *gbprox_peer_by_nsei(struct gbproxy_config *cfg, uint16_t nsei);
struct gbproxy_tlli_info *gbprox_find_tlli_by_mi(struct gbproxy_peer *peer,
const uint8_t *mi_data, size_t mi_data_len);
void gbprox_register_tlli(struct gbproxy_peer *peer, uint32_t tlli,
const uint8_t *imsi, size_t imsi_len, time_t now);
struct gbproxy_peer *gbproxy_peer_alloc(struct gbproxy_config *cfg, uint16_t bvci);
void gbproxy_peer_free(struct gbproxy_peer *peer);
int gbprox_check_imsi(struct gbproxy_peer *peer,
const uint8_t *imsi, size_t imsi_len);
#endif
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