259 lines
7.1 KiB
C
259 lines
7.1 KiB
C
#ifndef _GB_PROXY_H
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#define _GB_PROXY_H
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#include <osmocom/core/msgb.h>
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#include <osmocom/gprs/gprs_ns.h>
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#include <osmocom/vty/command.h>
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#include <sys/types.h>
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#include <regex.h>
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struct rate_ctr_group;
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struct gprs_gb_parse_context;
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struct tlv_parsed;
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enum gbproxy_patch_mode {
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GBPROX_PATCH_DEFAULT,
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GBPROX_PATCH_BSSGP, /*!< BSGGP messages only */
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GBPROX_PATCH_LLC_ATTACH_REQ, /*!< BSSGP and Attach Request */
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GBPROX_PATCH_LLC_ATTACH, /*!< BSSGP and Attach Request/Response */
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GBPROX_PATCH_LLC_GMM, /*!< BSSGP and all GMM msgs */
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GBPROX_PATCH_LLC_GSM, /*!< BSSGP and all GMM and GSM msgs */
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GBPROX_PATCH_LLC, /*!< BSSGP and all supported LLC msgs */
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};
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enum gbproxy_global_ctr {
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GBPROX_GLOB_CTR_INV_BVCI,
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GBPROX_GLOB_CTR_INV_LAI,
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GBPROX_GLOB_CTR_INV_RAI,
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GBPROX_GLOB_CTR_INV_NSEI,
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GBPROX_GLOB_CTR_PROTO_ERR_BSS,
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GBPROX_GLOB_CTR_PROTO_ERR_SGSN,
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GBPROX_GLOB_CTR_NOT_SUPPORTED_BSS,
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GBPROX_GLOB_CTR_NOT_SUPPORTED_SGSN,
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GBPROX_GLOB_CTR_RESTART_RESET_SGSN,
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GBPROX_GLOB_CTR_TX_ERR_SGSN,
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GBPROX_GLOB_CTR_OTHER_ERR,
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GBPROX_GLOB_CTR_PATCH_PEER_ERR,
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};
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enum gbproxy_peer_ctr {
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GBPROX_PEER_CTR_BLOCKED,
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GBPROX_PEER_CTR_UNBLOCKED,
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GBPROX_PEER_CTR_DROPPED,
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GBPROX_PEER_CTR_INV_NSEI,
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GBPROX_PEER_CTR_TX_ERR,
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GBPROX_PEER_CTR_RAID_PATCHED_BSS,
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GBPROX_PEER_CTR_RAID_PATCHED_SGSN,
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GBPROX_PEER_CTR_APN_PATCHED,
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GBPROX_PEER_CTR_TLLI_PATCHED_BSS,
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GBPROX_PEER_CTR_TLLI_PATCHED_SGSN,
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GBPROX_PEER_CTR_PTMSI_PATCHED_BSS,
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GBPROX_PEER_CTR_PTMSI_PATCHED_SGSN,
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GBPROX_PEER_CTR_PATCH_CRYPT_ERR,
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GBPROX_PEER_CTR_PATCH_ERR,
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GBPROX_PEER_CTR_ATTACH_REQS,
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GBPROX_PEER_CTR_ATTACH_REJS,
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GBPROX_PEER_CTR_TLLI_UNKNOWN,
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GBPROX_PEER_CTR_TLLI_CACHE_SIZE,
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};
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struct gbproxy_config {
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/* parsed from config file */
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uint16_t nsip_sgsn_nsei;
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/* misc */
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struct gprs_ns_inst *nsi;
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/* Linked list of all Gb peers (except SGSN) */
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struct llist_head bts_peers;
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/* Counter */
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struct rate_ctr_group *ctrg;
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/* force mcc/mnc */
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int core_mnc;
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int core_mcc;
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uint8_t* core_apn;
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size_t core_apn_size;
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char * match_re;
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enum gbproxy_patch_mode patch_mode;
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int tlli_max_age;
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int tlli_max_len;
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/* Experimental config */
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int patch_ptmsi;
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int acquire_imsi;
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int route_to_sgsn2;
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uint16_t nsip_sgsn2_nsei;
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/* IMSI checking/matching */
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int check_imsi;
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regex_t imsi_re_comp;
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/* Used to generate identifiers */
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unsigned bss_ptmsi_state;
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unsigned sgsn_tlli_state;
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};
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struct gbproxy_patch_state {
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int local_mnc;
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int local_mcc;
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/* List of TLLIs for which patching is enabled */
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struct llist_head enabled_tllis;
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int enabled_tllis_count;
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};
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struct gbproxy_peer {
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struct llist_head list;
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/* point back to the config */
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struct gbproxy_config *cfg;
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/* NSEI of the peer entity */
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uint16_t nsei;
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/* BVCI used for Point-to-Point to this peer */
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uint16_t bvci;
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int blocked;
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/* Routeing Area that this peer is part of (raw 04.08 encoding) */
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uint8_t ra[6];
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/* Counter */
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struct rate_ctr_group *ctrg;
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struct gbproxy_patch_state patch_state;
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};
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struct gbproxy_tlli_state {
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uint32_t current;
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uint32_t assigned;
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int bss_validated;
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int net_validated;
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uint32_t ptmsi;
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};
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struct gbproxy_tlli_info {
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struct llist_head list;
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struct gbproxy_tlli_state tlli;
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struct gbproxy_tlli_state sgsn_tlli;
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time_t timestamp;
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uint8_t *mi_data;
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size_t mi_data_len;
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int imsi_acq_pending;
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struct llist_head stored_msgs;
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int imsi_acq_retries;
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int enable_patching;
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};
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/* gb_proxy_vty .c */
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int gbproxy_vty_init(void);
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int gbproxy_parse_config(const char *config_file, struct gbproxy_config *cfg);
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/* gb_proxy.c */
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int gbproxy_init_config(struct gbproxy_config *cfg);
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/* Main input function for Gb proxy */
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int gbprox_rcvmsg(struct gbproxy_config *cfg, struct msgb *msg, uint16_t nsei, uint16_t ns_bvci, uint16_t nsvci);
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int gbprox_signal(unsigned int subsys, unsigned int signal,
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void *handler_data, void *signal_data);
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/* Reset all persistent NS-VC's */
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int gbprox_reset_persistent_nsvcs(struct gprs_ns_inst *nsi);
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void gbprox_reset(struct gbproxy_config *cfg);
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/* TLLI state handling */
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void gbproxy_delete_tllis(struct gbproxy_peer *peer);
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int gbproxy_check_tlli(
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struct gbproxy_peer *peer,
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struct gbproxy_tlli_info *tlli_info);
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struct gbproxy_tlli_info *gbprox_find_tlli_by_ptmsi(
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struct gbproxy_peer *peer,
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uint32_t ptmsi);
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uint32_t gbproxy_map_tlli(
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uint32_t other_tlli, struct gbproxy_tlli_info *tlli_info, int to_bss);
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struct gbproxy_tlli_info *gbproxy_update_tlli_state_ul(
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struct gbproxy_peer *peer, time_t now,
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struct gprs_gb_parse_context *parse_ctx);
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struct gbproxy_tlli_info *gbproxy_update_tlli_state_dl(
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struct gbproxy_peer *peer, time_t now,
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struct gprs_gb_parse_context *parse_ctx);
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void gbproxy_update_tlli_state_after(
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struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info,
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time_t now, struct gprs_gb_parse_context *parse_ctx);
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int gbproxy_remove_stale_tllis(struct gbproxy_peer *peer, time_t now);
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void gbproxy_delete_tlli(struct gbproxy_peer *peer,
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struct gbproxy_tlli_info *tlli_info);
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void gbproxy_tlli_info_discard_messages(struct gbproxy_tlli_info *tlli_info);
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struct gbproxy_tlli_info *gbproxy_register_tlli(
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struct gbproxy_peer *peer, uint32_t tlli,
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const uint8_t *imsi, size_t imsi_len, time_t now);
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struct gbproxy_tlli_info *gbproxy_find_tlli(
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struct gbproxy_peer *peer, uint32_t tlli);
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struct gbproxy_tlli_info *gbproxy_find_tlli_by_mi(
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struct gbproxy_peer *peer, const uint8_t *mi_data, size_t mi_data_len);
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struct gbproxy_tlli_info *gbproxy_find_tlli_by_sgsn_tlli(
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struct gbproxy_peer *peer,
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uint32_t tlli);
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struct gbproxy_tlli_info *gbproxy_find_tlli_by_ptmsi(
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struct gbproxy_peer *peer,
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uint32_t ptmsi);
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/* needed by gb_proxy_tlli.h */
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uint32_t gbproxy_make_bss_ptmsi(struct gbproxy_peer *peer, uint32_t sgsn_ptmsi);
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uint32_t gbproxy_make_sgsn_tlli(
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struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info,
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uint32_t bss_tlli);
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int gbproxy_check_imsi(
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struct gbproxy_peer *peer, const uint8_t *imsi, size_t imsi_len);
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/* Message patching */
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void gbproxy_patch_bssgp(
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struct msgb *msg, uint8_t *bssgp, size_t bssgp_len,
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struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info,
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int *len_change, struct gprs_gb_parse_context *parse_ctx);
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int gbproxy_patch_llc(
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struct msgb *msg, uint8_t *llc, size_t llc_len,
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struct gbproxy_peer *peer, struct gbproxy_tlli_info *tlli_info,
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int *len_change, struct gprs_gb_parse_context *parse_ctx);
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int gbproxy_set_patch_filter(
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struct gbproxy_config *cfg, const char *filter, const char **err_msg);
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void gbproxy_clear_patch_filter(struct gbproxy_config *cfg);
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int gbproxy_check_imsi(
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struct gbproxy_peer *peer, const uint8_t *imsi, size_t imsi_len);
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/* Peer handling */
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struct gbproxy_peer *gbproxy_peer_by_bvci(
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struct gbproxy_config *cfg, uint16_t bvci);
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struct gbproxy_peer *gbproxy_peer_by_nsei(
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struct gbproxy_config *cfg, uint16_t nsei);
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struct gbproxy_peer *gbproxy_peer_by_rai(
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struct gbproxy_config *cfg, const uint8_t *ra);
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struct gbproxy_peer *gbproxy_peer_by_lai(
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struct gbproxy_config *cfg, const uint8_t *la);
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struct gbproxy_peer *gbproxy_peer_by_bssgp_tlv(
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struct gbproxy_config *cfg, struct tlv_parsed *tp);
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struct gbproxy_peer *gbproxy_peer_alloc(struct gbproxy_config *cfg, uint16_t bvci);
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void gbproxy_peer_free(struct gbproxy_peer *peer);
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int gbproxy_cleanup_peers(struct gbproxy_config *cfg, uint16_t nsei, uint16_t bvci);
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#endif
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