| #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; |
| struct gprs_gb_parse_context; |
| struct tlv_parsed; |
| |
| 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 */ |
| }; |
| |
| enum gbproxy_global_ctr { |
| GBPROX_GLOB_CTR_INV_BVCI, |
| GBPROX_GLOB_CTR_INV_LAI, |
| GBPROX_GLOB_CTR_INV_RAI, |
| GBPROX_GLOB_CTR_INV_NSEI, |
| GBPROX_GLOB_CTR_PROTO_ERR_BSS, |
| GBPROX_GLOB_CTR_PROTO_ERR_SGSN, |
| GBPROX_GLOB_CTR_NOT_SUPPORTED_BSS, |
| GBPROX_GLOB_CTR_NOT_SUPPORTED_SGSN, |
| GBPROX_GLOB_CTR_RESTART_RESET_SGSN, |
| GBPROX_GLOB_CTR_TX_ERR_SGSN, |
| GBPROX_GLOB_CTR_OTHER_ERR, |
| GBPROX_GLOB_CTR_PATCH_PEER_ERR, |
| }; |
| |
| enum gbproxy_peer_ctr { |
| GBPROX_PEER_CTR_BLOCKED, |
| GBPROX_PEER_CTR_UNBLOCKED, |
| GBPROX_PEER_CTR_DROPPED, |
| GBPROX_PEER_CTR_INV_NSEI, |
| GBPROX_PEER_CTR_TX_ERR, |
| GBPROX_PEER_CTR_RAID_PATCHED_BSS, |
| GBPROX_PEER_CTR_RAID_PATCHED_SGSN, |
| GBPROX_PEER_CTR_APN_PATCHED, |
| GBPROX_PEER_CTR_TLLI_PATCHED_BSS, |
| GBPROX_PEER_CTR_TLLI_PATCHED_SGSN, |
| GBPROX_PEER_CTR_PTMSI_PATCHED_BSS, |
| GBPROX_PEER_CTR_PTMSI_PATCHED_SGSN, |
| GBPROX_PEER_CTR_PATCH_CRYPT_ERR, |
| GBPROX_PEER_CTR_PATCH_ERR, |
| GBPROX_PEER_CTR_ATTACH_REQS, |
| GBPROX_PEER_CTR_ATTACH_REJS, |
| GBPROX_PEER_CTR_TLLI_UNKNOWN, |
| GBPROX_PEER_CTR_TLLI_CACHE_SIZE, |
| }; |
| |
| 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; |
| int patch_ptmsi; |
| |
| /* IMSI checking/matching */ |
| int check_imsi; |
| regex_t imsi_re_comp; |
| |
| /* Used to generate identifiers */ |
| unsigned bss_ptmsi_state; |
| unsigned sgsn_tlli_state; |
| }; |
| |
| 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_state { |
| uint32_t current; |
| uint32_t assigned; |
| int bss_validated; |
| int net_validated; |
| |
| uint32_t ptmsi; |
| }; |
| |
| struct gbproxy_tlli_info { |
| struct llist_head list; |
| |
| struct gbproxy_tlli_state tlli; |
| struct gbproxy_tlli_state sgsn_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); |
| |
| /* TLLI state handling */ |
| void gbproxy_delete_tllis(struct gbproxy_peer *peer); |
| int gbproxy_check_tlli(struct gbproxy_peer *peer, uint32_t tlli); |
| struct gbproxy_tlli_info *gbprox_find_tlli_by_ptmsi( |
| struct gbproxy_peer *peer, |
| uint32_t ptmsi); |
| uint32_t gbproxy_map_tlli( |
| uint32_t other_tlli, struct gbproxy_tlli_info *tlli_info, int to_bss); |
| struct gbproxy_tlli_info *gbproxy_update_tlli_state_ul( |
| struct gbproxy_peer *peer, time_t now, |
| struct gprs_gb_parse_context *parse_ctx); |
| struct gbproxy_tlli_info *gbproxy_update_tlli_state_dl( |
| struct gbproxy_peer *peer, time_t now, |
| struct gprs_gb_parse_context *parse_ctx); |
| void gbproxy_update_tlli_state_after( |
| struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info, |
| time_t now, struct gprs_gb_parse_context *parse_ctx); |
| int gbproxy_remove_stale_tllis(struct gbproxy_peer *peer, time_t now); |
| void gbproxy_delete_tlli(struct gbproxy_peer *peer, |
| struct gbproxy_tlli_info *tlli_info); |
| |
| struct gbproxy_tlli_info *gbproxy_register_tlli( |
| struct gbproxy_peer *peer, uint32_t tlli, |
| const uint8_t *imsi, size_t imsi_len, time_t now); |
| |
| struct gbproxy_tlli_info *gbproxy_find_tlli( |
| struct gbproxy_peer *peer, uint32_t tlli); |
| struct gbproxy_tlli_info *gbproxy_find_tlli_by_mi( |
| struct gbproxy_peer *peer, const uint8_t *mi_data, size_t mi_data_len); |
| struct gbproxy_tlli_info *gbproxy_find_tlli_by_sgsn_tlli( |
| struct gbproxy_peer *peer, |
| uint32_t tlli); |
| struct gbproxy_tlli_info *gbproxy_find_tlli_by_ptmsi( |
| struct gbproxy_peer *peer, |
| uint32_t ptmsi); |
| |
| /* needed by gb_proxy_tlli.h */ |
| uint32_t gbproxy_make_bss_ptmsi(struct gbproxy_peer *peer, uint32_t sgsn_ptmsi); |
| uint32_t gbproxy_make_sgsn_tlli( |
| struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info, |
| uint32_t bss_tlli); |
| int gbproxy_check_imsi( |
| struct gbproxy_peer *peer, const uint8_t *imsi, size_t imsi_len); |
| |
| /* Message patching */ |
| void gbproxy_patch_bssgp( |
| struct msgb *msg, uint8_t *bssgp, size_t bssgp_len, |
| struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info, |
| int *len_change, struct gprs_gb_parse_context *parse_ctx) |
| __attribute__((nonnull)); |
| |
| int gbproxy_patch_llc( |
| struct msgb *msg, uint8_t *llc, size_t llc_len, |
| struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info, |
| int *len_change, struct gprs_gb_parse_context *parse_ctx) |
| __attribute__((nonnull)); |
| |
| int gbproxy_set_patch_filter( |
| struct gbproxy_config *cfg, const char *filter, const char **err_msg); |
| void gbproxy_clear_patch_filter(struct gbproxy_config *cfg); |
| int gbproxy_check_imsi( |
| struct gbproxy_peer *peer, const uint8_t *imsi, size_t imsi_len); |
| |
| /* Peer handling */ |
| struct gbproxy_peer *gbproxy_peer_by_bvci( |
| struct gbproxy_config *cfg, uint16_t bvci) __attribute__((nonnull)); |
| struct gbproxy_peer *gbproxy_peer_by_nsei( |
| struct gbproxy_config *cfg, uint16_t nsei) __attribute__((nonnull)); |
| struct gbproxy_peer *gbproxy_peer_by_rai( |
| struct gbproxy_config *cfg, const uint8_t *ra) __attribute__((nonnull)); |
| struct gbproxy_peer *gbproxy_peer_by_lai( |
| struct gbproxy_config *cfg, const uint8_t *la) __attribute__((nonnull)); |
| struct gbproxy_peer *gbproxy_peer_by_bssgp_tlv( |
| struct gbproxy_config *cfg, struct tlv_parsed *tp) |
| __attribute__((nonnull)); |
| struct gbproxy_peer *gbproxy_peer_alloc(struct gbproxy_config *cfg, uint16_t bvci) |
| __attribute__((nonnull)); |
| void gbproxy_peer_free(struct gbproxy_peer *peer) __attribute__((nonnull)); |
| int gbproxy_cleanup_peers(struct gbproxy_config *cfg, uint16_t nsei, uint16_t bvci) |
| __attribute__((nonnull)); |
| |
| #endif |