240 lines
6.8 KiB
C
240 lines
6.8 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/core/timer.h>
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#include <osmocom/core/fsm.h>
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#include <osmocom/core/hashtable.h>
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#include <osmocom/gsm/gsm23003.h>
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#include <osmocom/gsm/gsm23236.h>
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#include <osmocom/gprs/gprs_ns2.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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#include <stdbool.h>
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#define GBPROXY_INIT_VU_GEN_TX 256
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#define GBPROXY_MAX_NR_SGSN 16
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/* BVCI uses 16 bits */
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#define BVC_LOG_CTX_FLAG (1<<17)
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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_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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};
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enum gbproxy_bvc_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_LAST,
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};
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/* global gb-proxy configuration */
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struct gbproxy_config {
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/* NS instance of libosmogb */
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struct gprs_ns2_inst *nsi;
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struct {
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/* percentage of BVC flow control advertised to each SGSN in the pool */
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uint8_t bvc_fc_ratio;
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/* NRI bitlen and usable NULL-NRI ranges */
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uint8_t nri_bitlen;
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struct osmo_nri_ranges *null_nri_ranges;
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} pool;
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/* hash table of all BSS side Gb peers */
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DECLARE_HASHTABLE(bss_nses, 8);
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/* hash table of all SGSN-side Gb peers */
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DECLARE_HASHTABLE(sgsn_nses, 8);
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/* hash table of all gbproxy_cell */
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DECLARE_HASHTABLE(cells, 8);
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/* List of all SGSNs */
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struct llist_head sgsns;
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/* Counter */
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struct rate_ctr_group *ctrg;
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};
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/* One Cell within the BSS: Links BSS-side BVC to SGSN-side BVCs */
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struct gbproxy_cell {
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/* linked to gbproxy_config.cells hashtable */
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struct hlist_node list;
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/* point back to the config */
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struct gbproxy_config *cfg;
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/* BVCI of PTP BVCs associated to this cell */
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uint16_t bvci;
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/* Routing Area that this BVC is part of (raw 04.08 encoding) */
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uint8_t ra[6];
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/* pointer to the BSS-side BVC */
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struct gbproxy_bvc *bss_bvc;
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/* pointers to SGSN-side BVC (one for each pool member) */
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struct gbproxy_bvc *sgsn_bvc[GBPROXY_MAX_NR_SGSN];
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};
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/* One BVC inside an NSE */
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struct gbproxy_bvc {
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/* linked to gbproxy_nse.bvcs */
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struct hlist_node list;
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/* The NSE this BVC belongs to */
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struct gbproxy_nse *nse;
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/* PTP BVCI of this BVC */
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uint16_t bvci;
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/* Routing Area that this BVC 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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/* the cell to which this BVC belongs */
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struct gbproxy_cell *cell;
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/* per-BVC FSM instance */
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struct osmo_fsm_inst *fi;
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};
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/* one NS Entity that we interact with (BSS/PCU) */
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struct gbproxy_nse {
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/* linked to gbproxy_config.bss_nses */
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struct hlist_node 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 NSE */
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uint16_t nsei;
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/* Are we facing towards a SGSN (true) or BSS (false) */
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bool sgsn_facing;
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/* List of all BVCs in this NSE */
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DECLARE_HASHTABLE(bvcs, 10);
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};
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/* SGSN configuration such as pool options (only for NSE where sgsn_facing == true) */
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struct gbproxy_sgsn {
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/* linked to gbproxy_config.sgsns */
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struct llist_head list;
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/* The NSE belonging to this SGSN */
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struct gbproxy_nse *nse;
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/* Name of the SGSN */
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char *name;
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/* Pool configuration for the sgsn (only valid if sgsn_facing == true) */
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struct {
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bool allow_attach;
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struct osmo_nri_ranges *nri_ranges;
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} pool;
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};
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/* Convenience logging macros for NSE/BVC */
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#define LOGPNSE_CAT(NSE, SUBSYS, LEVEL, FMT, ARGS...) \
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LOGP(SUBSYS, LEVEL, "NSE(%05u/%s) " FMT, (NSE)->nsei, \
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(NSE)->sgsn_facing ? "SGSN" : "BSS", ## ARGS)
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#define LOGPNSE(NSE, LEVEL, FMT, ARGS...) \
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LOGPNSE_CAT(NSE, DGPRS, LEVEL, FMT, ## ARGS)
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#define LOGPBVC_CAT(BVC, SUBSYS, LEVEL, FMT, ARGS...) \
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LOGP(SUBSYS, LEVEL, "NSE(%05u/%s)-BVC(%05u/%s) " FMT, (BVC)->nse->nsei, \
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(BVC)->nse->sgsn_facing ? "SGSN" : "BSS", (BVC)->bvci, \
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osmo_fsm_inst_state_name((BVC)->fi), ## ARGS)
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#define LOGPBVC(BVC, LEVEL, FMT, ARGS...) \
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LOGPBVC_CAT(BVC, DGPRS, LEVEL, FMT, ## ARGS)
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#define LOGPCELL_CAT(CELL, SUBSYS, LEVEL, FMT, ARGS...) \
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LOGP(SUBSYS, LEVEL, "CELL(%05u) " FMT, (CELL)->bvci, ## ARGS)
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#define LOGPCELL(CELL, LEVEL, FMT, ARGS...) \
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LOGPCELL_CAT(CELL, DGPRS, LEVEL, FMT, ## ARGS)
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#define LOGPSGSN_CAT(SGSN, SUBSYS, LEVEL, FMT, ARGS...) \
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LOGP(SUBSYS, LEVEL, "NSE(%05u)-SGSN(%s) " FMT, (SGSN)->nse->nsei, (SGSN)->name, ## ARGS)
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#define LOGPSGSN(SGSN, LEVEL, FMT, ARGS...) \
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LOGPSGSN_CAT(SGSN, DGPRS, LEVEL, FMT, ## ARGS)
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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_ctrl.c */
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int gb_ctrl_cmds_install(void);
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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(void *ctx, struct msgb *msg);
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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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int gprs_ns2_prim_cb(struct osmo_prim_hdr *oph, void *ctx);
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void gbprox_reset(struct gbproxy_config *cfg);
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/* Peer handling */
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#define NSE_F_SGSN 0x0001
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#define NSE_F_BSS 0x0002
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struct gbproxy_bvc *gbproxy_bvc_by_bvci(struct gbproxy_nse *nse, uint16_t bvci);
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struct gbproxy_bvc *gbproxy_bvc_alloc(struct gbproxy_nse *nse, uint16_t bvci);
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void gbproxy_bvc_free(struct gbproxy_bvc *bvc);
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int gbproxy_cleanup_bvcs(struct gbproxy_nse *nse, uint16_t bvci);
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struct gbproxy_cell *gbproxy_cell_alloc(struct gbproxy_config *cfg, uint16_t bvci);
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struct gbproxy_cell *gbproxy_cell_by_bvci(struct gbproxy_config *cfg, uint16_t bvci);
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void gbproxy_cell_free(struct gbproxy_cell *cell);
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bool gbproxy_cell_add_sgsn_bvc(struct gbproxy_cell *cell, struct gbproxy_bvc *bvc);
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/* NSE handling */
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struct gbproxy_nse *gbproxy_nse_alloc(struct gbproxy_config *cfg, uint16_t nsei, bool sgsn_facing);
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void gbproxy_nse_free(struct gbproxy_nse *nse);
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struct gbproxy_nse *gbproxy_nse_by_nsei(struct gbproxy_config *cfg, uint16_t nsei, uint32_t flags);
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struct gbproxy_nse *gbproxy_nse_by_nsei_or_new(struct gbproxy_config *cfg, uint16_t nsei, bool sgsn_facing);
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/* SGSN handling */
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struct gbproxy_sgsn *gbproxy_sgsn_alloc(struct gbproxy_config *cfg, uint16_t nsei, const char *name);
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void gbproxy_sgsn_free(struct gbproxy_sgsn *sgsn);
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struct gbproxy_sgsn *gbproxy_sgsn_by_name(struct gbproxy_config *cfg, const char *name);
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struct gbproxy_sgsn *gbproxy_sgsn_by_nsei(struct gbproxy_config *cfg, uint16_t nsei);
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struct gbproxy_sgsn *gbproxy_sgsn_by_nsei_or_new(struct gbproxy_config *cfg, uint16_t nsei);
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struct gbproxy_sgsn *gbproxy_sgsn_by_nri(struct gbproxy_config *cfg, uint16_t nri, bool *null_nri);
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struct gbproxy_sgsn *gbproxy_sgsn_by_tlli(struct gbproxy_config *cfg, struct gbproxy_sgsn *sgsn_avoid,
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uint32_t tlli);
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#endif
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