221 lines
5.6 KiB
C
221 lines
5.6 KiB
C
#ifndef _GPRS_SGSN_H
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#define _GPRS_SGSN_H
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#include <stdint.h>
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#include <netinet/in.h>
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#include <osmocom/gsm/gsm48.h>
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#include <osmocom/crypt/gprs_cipher.h>
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#define GSM_IMSI_LENGTH 17
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#define GSM_IMEI_LENGTH 17
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#define GSM_EXTENSION_LENGTH 15
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struct gprs_llc_lle;
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/* TS 04.08 4.1.3.3 GMM mobility management states on the network side */
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enum gprs_mm_state {
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GMM_DEREGISTERED, /* 4.1.3.3.1.1 */
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GMM_COMMON_PROC_INIT, /* 4.1.3.3.1.2 */
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GMM_REGISTERED_NORMAL, /* 4.1.3.3.2.1 */
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GMM_REGISTERED_SUSPENDED, /* 4.1.3.3.2.2 */
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GMM_DEREGISTERED_INIT, /* 4.1.3.3.1.4 */
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};
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enum gprs_mm_ctr {
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GMM_CTR_PKTS_SIG_IN,
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GMM_CTR_PKTS_SIG_OUT,
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GMM_CTR_PKTS_UDATA_IN,
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GMM_CTR_PKTS_UDATA_OUT,
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GMM_CTR_BYTES_UDATA_IN,
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GMM_CTR_BYTES_UDATA_OUT,
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GMM_CTR_PDP_CTX_ACT,
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GMM_CTR_SUSPEND,
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GMM_CTR_PAGING_PS,
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GMM_CTR_PAGING_CS,
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GMM_CTR_RA_UPDATE,
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};
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enum gprs_pdp_ctx {
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PDP_CTR_PKTS_UDATA_IN,
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PDP_CTR_PKTS_UDATA_OUT,
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PDP_CTR_BYTES_UDATA_IN,
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PDP_CTR_BYTES_UDATA_OUT,
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};
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enum gprs_t3350_mode {
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GMM_T3350_MODE_ATT,
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GMM_T3350_MODE_RAU,
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GMM_T3350_MODE_PTMSI_REALL,
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};
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#define MS_RADIO_ACCESS_CAPA
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/* According to TS 03.60, Table 5: SGSN MM and PDP Contexts */
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/* Extended by 3GPP TS 23.060, Table 6: SGSN MM and PDP Contexts */
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struct sgsn_mm_ctx {
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struct llist_head list;
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char imsi[GSM_IMSI_LENGTH];
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enum gprs_mm_state mm_state;
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uint32_t p_tmsi;
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uint32_t p_tmsi_old; /* old P-TMSI before new is confirmed */
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uint32_t p_tmsi_sig;
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char imei[GSM_IMEI_LENGTH];
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/* Opt: Software Version Numbber / TS 23.195 */
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char msisdn[GSM_EXTENSION_LENGTH];
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struct gprs_ra_id ra;
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uint16_t cell_id;
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uint32_t cell_id_age;
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uint16_t sac; /* Iu: Service Area Code */
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uint32_t sac_age;/* Iu: Service Area Code age */
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/* VLR number */
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uint32_t new_sgsn_addr;
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/* Authentication Triplets */
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/* Kc */
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/* Iu: CK, IK, KSI */
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/* CKSN */
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enum gprs_ciph_algo ciph_algo;
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struct {
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uint8_t buf[14]; /* 10.5.5.12a */
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uint8_t len;
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} ms_radio_access_capa;
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struct {
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uint8_t buf[4]; /* 10.5.5.12 */
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uint8_t len;
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} ms_network_capa;
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uint16_t drx_parms;
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int mnrg; /* MS reported to HLR? */
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int ngaf; /* MS reported to MSC/VLR? */
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int ppf; /* paging for GPRS + non-GPRS? */
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/* SMS Parameters */
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int recovery;
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uint8_t radio_prio_sms;
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struct llist_head pdp_list;
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/* Additional bits not present in the GSM TS */
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struct gprs_llc_llme *llme;
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uint32_t tlli;
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uint32_t tlli_new;
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uint16_t nsei;
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uint16_t bvci;
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struct rate_ctr_group *ctrg;
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struct timer_list timer;
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unsigned int T; /* Txxxx number */
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unsigned int num_T_exp; /* number of consecutive T expirations */
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enum gprs_t3350_mode t3350_mode;
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uint8_t t3370_id_type;
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};
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/* look-up a SGSN MM context based on TLLI + RAI */
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struct sgsn_mm_ctx *sgsn_mm_ctx_by_tlli(uint32_t tlli,
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const struct gprs_ra_id *raid);
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struct sgsn_mm_ctx *sgsn_mm_ctx_by_ptmsi(uint32_t tmsi);
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struct sgsn_mm_ctx *sgsn_mm_ctx_by_imsi(const char *imsi);
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/* Allocate a new SGSN MM context */
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struct sgsn_mm_ctx *sgsn_mm_ctx_alloc(uint32_t tlli,
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const struct gprs_ra_id *raid);
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void sgsn_mm_ctx_free(struct sgsn_mm_ctx *mm);
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enum pdp_ctx_state {
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PDP_STATE_NONE,
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PDP_STATE_CR_REQ,
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PDP_STATE_CR_CONF,
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/* 04.08 / Figure 6.2 / 6.1.2.2 */
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PDP_STATE_INACT_PEND,
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PDP_STATE_INACTIVE = PDP_STATE_NONE,
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};
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enum pdp_type {
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PDP_TYPE_NONE,
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PDP_TYPE_ETSI_PPP,
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PDP_TYPE_IANA_IPv4,
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PDP_TYPE_IANA_IPv6,
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};
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struct sgsn_pdp_ctx {
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struct llist_head list; /* list_head for mmctx->pdp_list */
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struct llist_head g_list; /* list_head for global list */
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struct sgsn_mm_ctx *mm; /* back pointer to MM CTX */
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struct sgsn_ggsn_ctx *ggsn; /* which GGSN serves this PDP */
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struct rate_ctr_group *ctrg;
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//unsigned int id;
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struct pdp_t *lib; /* pointer to libgtp PDP ctx */
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enum pdp_ctx_state state;
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enum pdp_type type;
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uint32_t address;
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char *apn_subscribed;
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//char *apn_used;
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uint16_t nsapi; /* SNDCP */
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uint16_t sapi; /* LLC */
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uint8_t ti; /* transaction identifier */
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int vplmn_allowed;
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uint32_t qos_profile_subscr;
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//uint32_t qos_profile_req;
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//uint32_t qos_profile_neg;
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uint8_t radio_prio;
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uint32_t tx_npdu_nr;
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uint32_t rx_npdu_nr;
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uint32_t tx_gtp_snd;
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uint32_t rx_gtp_snu;
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//uint32_t charging_id;
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int reordering_reqd;
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struct timer_list timer;
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unsigned int T; /* Txxxx number */
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unsigned int num_T_exp; /* number of consecutive T expirations */
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};
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/* look up PDP context by MM context and NSAPI */
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struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_nsapi(const struct sgsn_mm_ctx *mm,
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uint8_t nsapi);
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/* look up PDP context by MM context and transaction ID */
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struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_tid(const struct sgsn_mm_ctx *mm,
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uint8_t tid);
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struct sgsn_pdp_ctx *sgsn_pdp_ctx_alloc(struct sgsn_mm_ctx *mm,
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uint8_t nsapi);
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void sgsn_pdp_ctx_free(struct sgsn_pdp_ctx *pdp);
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struct sgsn_ggsn_ctx {
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struct llist_head list;
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uint32_t id;
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unsigned int gtp_version;
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struct in_addr remote_addr;
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int remote_restart_ctr;
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struct gsn_t *gsn;
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};
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struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_alloc(uint32_t id);
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struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_by_id(uint32_t id);
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struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_by_addr(struct in_addr *addr);
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struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_find_alloc(uint32_t id);
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struct apn_ctx {
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struct llist_head list;
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struct sgsn_ggsn_ctx *ggsn;
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char *name;
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char *description;
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};
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extern struct llist_head sgsn_mm_ctxts;
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extern struct llist_head sgsn_ggsn_ctxts;
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extern struct llist_head sgsn_apn_ctxts;
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extern struct llist_head sgsn_pdp_ctxts;
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uint32_t sgsn_alloc_ptmsi(void);
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/* High-level function to be called in case a GGSN has disappeared or
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* ottherwise lost state (recovery procedure) */
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int drop_all_pdp_for_ggsn(struct sgsn_ggsn_ctx *ggsn);
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#endif /* _GPRS_SGSN_H */
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