diff options
Diffstat (limited to 'include/osmocom/sgsn/gb_proxy.h')
| -rw-r--r-- | include/osmocom/sgsn/gb_proxy.h | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/include/osmocom/sgsn/gb_proxy.h b/include/osmocom/sgsn/gb_proxy.h index 95a3331ab..ac03a1134 100644 --- a/include/osmocom/sgsn/gb_proxy.h +++ b/include/osmocom/sgsn/gb_proxy.h @@ -35,7 +35,6 @@ enum gbproxy_global_ctr { 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_bvc_ctr { @@ -44,56 +43,9 @@ enum gbproxy_bvc_ctr { 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_ATTACH_ACKS, - GBPROX_PEER_CTR_ATTACH_COMPLS, - GBPROX_PEER_CTR_RA_UPD_REQS, - GBPROX_PEER_CTR_RA_UPD_REJS, - GBPROX_PEER_CTR_RA_UPD_ACKS, - GBPROX_PEER_CTR_RA_UPD_COMPLS, - GBPROX_PEER_CTR_GMM_STATUS_BSS, - GBPROX_PEER_CTR_GMM_STATUS_SGSN, - GBPROX_PEER_CTR_DETACH_REQS, - GBPROX_PEER_CTR_DETACH_ACKS, - GBPROX_PEER_CTR_PDP_ACT_REQS, - GBPROX_PEER_CTR_PDP_ACT_REJS, - GBPROX_PEER_CTR_PDP_ACT_ACKS, - GBPROX_PEER_CTR_PDP_DEACT_REQS, - GBPROX_PEER_CTR_PDP_DEACT_ACKS, - GBPROX_PEER_CTR_TLLI_UNKNOWN, - GBPROX_PEER_CTR_TLLI_CACHE_SIZE, GBPROX_PEER_CTR_LAST, }; -enum gbproxy_keep_mode { - GBPROX_KEEP_NEVER, /* don't ever keep TLLI/IMSI state of de-registered subscribers */ - GBPROX_KEEP_REATTACH, /* keep if re-attach has been requested by SGSN */ - GBPROX_KEEP_IDENTIFIED, /* keep if we had resolved an IMSI */ - GBPROX_KEEP_ALWAYS, /* always keep */ -}; - -enum gbproxy_match_id { - GBPROX_MATCH_PATCHING, /* match rule on whether or not we should patch */ - GBPROX_MATCH_ROUTING, /* match rule on whether or not we should route (2-SGSN) */ - GBPROX_MATCH_LAST -}; - -struct gbproxy_match { - bool enable; /* is this match enabled? */ - char *re_str; /* regular expression (for IMSI) in string format */ - regex_t re_comp; /* compiled regular expression (for IMSI) */ -}; - /* global gb-proxy configuration */ struct gbproxy_config { /* parsed from config file */ @@ -107,44 +59,6 @@ struct gbproxy_config { /* Counter */ struct rate_ctr_group *ctrg; - - /* MCC/MNC to be patched into RA-ID on the way from BSS to SGSN? */ - struct osmo_plmn_id core_plmn; - - /* APN to be patched into PDP CTX ACT REQ on the way from BSS to SGSN */ - uint8_t* core_apn; - size_t core_apn_size; - - /* Frequency (sec) at which timer to clean stale links is fired (0 disabled) */ - unsigned int clean_stale_timer_freq; - /* If !0, Max age to consider a struct gbproxy_link_info as stale */ - int tlli_max_age; - /* If !0, Max len of gbproxy_bvc->list (list of struct gbproxy_link_info) */ - int tlli_max_len; - /* If !0, Max len of gbproxy_link_info->stored_msgs (list of msgb) */ - uint32_t stored_msgs_max_len; - - /* Should the P-TMSI be patched on the fly (required for 2-SGSN config) */ - bool patch_ptmsi; - /* Should the IMSI be acquired by the proxy (required for 2-SGSN config) */ - bool acquire_imsi; - /* Should we route subscribers to two different SGSNs? */ - bool route_to_sgsn2; - /* NSEI of the second SGSN */ - uint16_t nsip_sgsn2_nsei; - /* should we keep a cache of per-subscriber state even after de-registration? */ - enum gbproxy_keep_mode keep_link_infos; - - /* IMSI checking/matching for 2-SGSN routing and patching */ - struct gbproxy_match matches[GBPROX_MATCH_LAST]; -}; - -struct gbproxy_patch_state { - struct osmo_plmn_id local_plmn; - - /* List of TLLIs for which patching is enabled */ - struct llist_head logical_links; - int logical_link_count; }; /* One BVC inside an NSE */ @@ -166,12 +80,6 @@ struct gbproxy_bvc { /* Counter */ struct rate_ctr_group *ctrg; - - /* State related to on-the-fly patching of certain messages */ - struct gbproxy_patch_state patch_state; - - /* Fired periodically to clean up stale links from list */ - struct osmo_timer_list clean_stale_timer; }; /* one NS Entity that we interact with (BSS/PCU) */ @@ -189,58 +97,6 @@ struct gbproxy_nse { DECLARE_HASHTABLE(bvcs, 10); }; -struct gbproxy_tlli_state { - /* currently active TLLI */ - uint32_t current; - /* newly-assigned TLLI (e.g. during P-TMSI allocation procedure) */ - uint32_t assigned; - /* has the BSS side validated (confirmed) the new TLLI? */ - bool bss_validated; - /* has the SGSN side validated (confirmed) the new TLLI? */ - bool net_validated; - /* NOTE: once both are validated, we set current = assigned and assigned = 0 */ - - /* The P-TMSI for this subscriber */ - uint32_t ptmsi; -}; - -/* One TLLI (= UE, = Subscriber) served via this proxy */ -struct gbproxy_link_info { - /* link to gbproxy_bvc.patch_state.logical_links */ - struct llist_head list; - - /* TLLI on the BSS/PCU side */ - struct gbproxy_tlli_state tlli; - /* TLLI on the SGSN side (can be different in case of P-TMSI patching) */ - struct gbproxy_tlli_state sgsn_tlli; - /* NSEI of the SGSN serving this link */ - uint32_t sgsn_nsei; - - /* timestamp when we last had any contact with this UE */ - time_t timestamp; - - /* IMSI of the subscriber (if/once known) */ - uint8_t *imsi; - size_t imsi_len; - - /* is the IMSI acquisition still pending? */ - bool imsi_acq_pending; - - /* queue of stored UL messages (until IMSI acquisition completes and we can - * determine which of the SGSNs we should route this to */ - struct llist_head stored_msgs; - uint32_t stored_msgs_len; - - /* generated N(U) we use (required due to IMSI acquisition */ - unsigned vu_gen_tx_bss; - - /* is this subscriber deregistered (TLLI invalidated)? */ - bool is_deregistered; - - /* does this link match either the (2-SGSN) routing or the patching rule? */ - bool is_matching[GBPROX_MATCH_LAST]; -}; - /* Convenience logging macros for NSE/BVC */ #define LOGPNSE_CAT(NSE, SUBSYS, LEVEL, FMT, ARGS...) \ LOGP(SUBSYS, LEVEL, "NSE(%05u/BSS) " FMT, (NSE)->nsei, ## ARGS) @@ -276,74 +132,6 @@ int gprs_ns2_prim_cb(struct osmo_prim_hdr *oph, void *ctx); void gbprox_reset(struct gbproxy_config *cfg); -/* TLLI info handling */ -void gbproxy_delete_link_infos(struct gbproxy_bvc *bvc); -struct gbproxy_link_info *gbproxy_update_link_state_ul( - struct gbproxy_bvc *bvc, time_t now, - struct gprs_gb_parse_context *parse_ctx); -struct gbproxy_link_info *gbproxy_update_link_state_dl( - struct gbproxy_bvc *bvc, time_t now, - struct gprs_gb_parse_context *parse_ctx); -int gbproxy_update_link_state_after( - struct gbproxy_bvc *bvc, struct gbproxy_link_info *link_info, - time_t now, struct gprs_gb_parse_context *parse_ctx); -int gbproxy_remove_stale_link_infos(struct gbproxy_bvc *bvc, time_t now); -void gbproxy_delete_link_info(struct gbproxy_bvc *bvc, - struct gbproxy_link_info *link_info); -void gbproxy_link_info_discard_messages(struct gbproxy_link_info *link_info); - -void gbproxy_attach_link_info(struct gbproxy_bvc *bvc, time_t now, - struct gbproxy_link_info *link_info); -void gbproxy_update_link_info(struct gbproxy_link_info *link_info, - const uint8_t *imsi, size_t imsi_len); -void gbproxy_detach_link_info(struct gbproxy_bvc *bvc, - struct gbproxy_link_info *link_info); -struct gbproxy_link_info *gbproxy_link_info_alloc( struct gbproxy_bvc *bvc); - -struct gbproxy_link_info *gbproxy_link_info_by_tlli( - struct gbproxy_bvc *bvc, uint32_t tlli); -struct gbproxy_link_info *gbproxy_link_info_by_imsi( - struct gbproxy_bvc *bvc, const uint8_t *imsi, size_t imsi_len); -struct gbproxy_link_info *gbproxy_link_info_by_any_sgsn_tlli( - struct gbproxy_bvc *bvc, uint32_t tlli); -struct gbproxy_link_info *gbproxy_link_info_by_sgsn_tlli( - struct gbproxy_bvc *bvc, - uint32_t tlli, uint32_t sgsn_nsei); -struct gbproxy_link_info *gbproxy_link_info_by_ptmsi( - struct gbproxy_bvc *bvc, - uint32_t ptmsi); - -int gbproxy_imsi_matches( - struct gbproxy_config *cfg, - enum gbproxy_match_id match_id, - struct gbproxy_link_info *link_info); -uint32_t gbproxy_map_tlli( - uint32_t other_tlli, struct gbproxy_link_info *link_info, int to_bss); - -/* needed by gb_proxy_tlli.h */ -uint32_t gbproxy_make_bss_ptmsi(struct gbproxy_bvc *bvc, uint32_t sgsn_ptmsi); -uint32_t gbproxy_make_sgsn_tlli( - struct gbproxy_bvc *bvc, struct gbproxy_link_info *link_info, - uint32_t bss_tlli); -void gbproxy_reset_link(struct gbproxy_link_info *link_info); -int gbproxy_check_imsi( - struct gbproxy_match *match, 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_bvc *bvc, struct gbproxy_link_info *link_info, - int *len_change, struct gprs_gb_parse_context *parse_ctx); - -int gbproxy_patch_llc( - struct msgb *msg, uint8_t *llc, size_t llc_len, - struct gbproxy_bvc *bvc, struct gbproxy_link_info *link_info, - int *len_change, struct gprs_gb_parse_context *parse_ctx); - -int gbproxy_set_patch_filter( - struct gbproxy_match *match, const char *filter, const char **err_msg); -void gbproxy_clear_patch_filter(struct gbproxy_match *match); - /* Peer handling */ struct gbproxy_bvc *gbproxy_bvc_by_bvci( struct gbproxy_config *cfg, uint16_t bvci); @@ -351,12 +139,6 @@ struct gbproxy_bvc *gbproxy_bvc_by_nsei( struct gbproxy_config *cfg, uint16_t nsei); struct gbproxy_bvc *gbproxy_bvc_by_rai( struct gbproxy_config *cfg, const uint8_t *ra); -struct gbproxy_bvc *gbproxy_bvc_by_lai( - struct gbproxy_config *cfg, const uint8_t *la); -struct gbproxy_bvc *gbproxy_bvc_by_lac( - struct gbproxy_config *cfg, const uint8_t *la); -struct gbproxy_bvc *gbproxy_bvc_by_bssgp_tlv( - struct gbproxy_config *cfg, struct tlv_parsed *tp); struct gbproxy_bvc *gbproxy_bvc_alloc(struct gbproxy_nse *nse, uint16_t bvci); void gbproxy_bvc_free(struct gbproxy_bvc *bvc); void gbproxy_bvc_move(struct gbproxy_bvc *bvc, struct gbproxy_nse *nse); |