406 lines
11 KiB
C
406 lines
11 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/core/timer.h>
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#include <osmocom/gsm/gsm48.h>
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#include <osmocom/crypt/gprs_cipher.h>
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#include <openbsc/gsm_data.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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#define GSM_APN_LENGTH 102
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struct gprs_llc_lle;
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struct ctrl_handle;
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struct gsm_subscriber;
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enum gsm48_gsm_cause;
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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_NONE,
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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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/* Authorization/ACL handling */
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enum sgsn_auth_state {
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SGSN_AUTH_UNKNOWN,
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SGSN_AUTH_AUTHENTICATE,
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SGSN_AUTH_ACCEPTED,
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SGSN_AUTH_REJECTED
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};
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#define MS_RADIO_ACCESS_CAPA
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enum sgsn_ggsn_lookup_state {
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SGSN_GGSN_2DIGIT,
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SGSN_GGSN_3DIGIT,
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};
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struct sgsn_ggsn_lookup {
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int state;
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struct sgsn_mm_ctx *mmctx;
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/* APN string */
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char apn_str[GSM_APN_LENGTH];
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/* the original data */
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struct msgb *orig_msg;
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struct tlv_parsed tp;
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/* for dealing with re-transmissions */
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uint8_t nsapi;
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uint8_t sapi;
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uint8_t ti;
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};
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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 Triplet */
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struct gsm_auth_tuple auth_triplet;
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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 len;
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uint8_t buf[50]; /* GSM 04.08 10.5.5.12a, extended in TS 24.008 */
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} ms_radio_access_capa;
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struct {
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uint8_t len;
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uint8_t buf[8]; /* GSM 04.08 10.5.5.12, extended in TS 24.008 */
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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 osmo_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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uint8_t pending_req; /* the request's message type */
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/* TODO: There isn't much semantic difference between t3350_mode
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* (refers to the timer) and pending_req (refers to the procedure),
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* where mm->T == 3350 => mm->t3350_mode == f(mm->pending_req). Check
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* whether one of them can be dropped. */
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enum sgsn_auth_state auth_state;
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int is_authenticated;
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/* the string representation of the current hlr */
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char hlr[GSM_EXTENSION_LENGTH];
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/* the current GGSN look-up operation */
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struct sgsn_ggsn_lookup *ggsn_lookup;
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struct gsm_subscriber *subscr;
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};
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#define LOGMMCTXP(level, mm, fmt, args...) \
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LOGP(DMM, level, "MM(%s/%08x) " fmt, (mm) ? (mm)->imsi : "---", \
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(mm) ? (mm)->p_tmsi : GSM_RESERVED_TMSI, ## args)
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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_cleanup_free(struct sgsn_mm_ctx *ctx);
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struct sgsn_ggsn_ctx *sgsn_mm_ctx_find_ggsn_ctx(struct sgsn_mm_ctx *mmctx,
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struct tlv_parsed *tp,
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enum gsm48_gsm_cause *gsm_cause,
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char *apn_str);
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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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int destroy_ggsn; /* destroy it on destruction */
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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 osmo_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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struct osmo_timer_list cdr_timer; /* CDR record wird timer */
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struct timespec cdr_start; /* The start of the CDR */
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uint64_t cdr_bytes_in;
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uint64_t cdr_bytes_out;
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uint32_t cdr_charging_id;
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};
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#define LOGPDPCTXP(level, pdp, fmt, args...) \
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LOGP(DGPRS, level, "PDP(%s/%u) " \
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fmt, (pdp)->mm ? (pdp)->mm->imsi : "---", (pdp)->ti, ## args)
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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_terminate(struct sgsn_pdp_ctx *pdp);
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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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void sgsn_ggsn_ctx_free(struct sgsn_ggsn_ctx *ggc);
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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 *imsi_prefix;
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char *description;
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};
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struct apn_ctx *sgsn_apn_ctx_find_alloc(const char *name, const char *imsi_prefix);
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void sgsn_apn_ctx_free(struct apn_ctx *actx);
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struct apn_ctx *sgsn_apn_ctx_by_name(const char *name, const char *imsi_prefix);
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struct apn_ctx *sgsn_apn_ctx_match(const char *name, const char *imsi_prefix);
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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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void sgsn_inst_init(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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char *gprs_pdpaddr2str(uint8_t *pdpa, uint8_t len);
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/* Force re-attachment based on msgb meta data */
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int sgsn_force_reattach_oldmsg(struct msgb *oldmsg);
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/*
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* ctrl interface related work
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*/
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struct gsm_network;
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struct ctrl_handle *sgsn_controlif_setup(struct gsm_network *, uint16_t port);
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int sgsn_ctrl_cmds_install(void);
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/*
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* Authorization/ACL handling
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*/
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struct imsi_acl_entry {
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struct llist_head list;
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char imsi[16+1];
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};
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/* see GSM 09.02, 17.7.1, PDP-Context and GPRSSubscriptionData */
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/* see GSM 09.02, B.1, gprsSubscriptionData */
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struct sgsn_subscriber_pdp_data {
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struct llist_head list;
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unsigned int context_id;
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uint16_t pdp_type;
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char apn_str[GSM_APN_LENGTH];
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uint8_t qos_subscribed[20];
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size_t qos_subscribed_len;
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};
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struct sgsn_subscriber_data {
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struct sgsn_mm_ctx *mm;
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struct gsm_auth_tuple auth_triplets[5];
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int auth_triplets_updated;
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struct llist_head pdp_list;
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int error_cause;
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uint8_t msisdn[9];
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size_t msisdn_len;
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uint8_t hlr[9];
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size_t hlr_len;
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};
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#define SGSN_ERROR_CAUSE_NONE (-1)
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#define LOGGSUBSCRP(level, subscr, fmt, args...) \
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LOGP(DGPRS, level, "SUBSCR(%s) " fmt, \
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(subscr) ? (subscr)->imsi : "---", \
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## args)
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struct sgsn_config;
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struct sgsn_instance;
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extern const struct value_string *sgsn_auth_state_names;
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void sgsn_auth_init(void);
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struct imsi_acl_entry *sgsn_acl_lookup(const char *imsi, struct sgsn_config *cfg);
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int sgsn_acl_add(const char *imsi, struct sgsn_config *cfg);
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int sgsn_acl_del(const char *imsi, struct sgsn_config *cfg);
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/* Request authorization */
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int sgsn_auth_request(struct sgsn_mm_ctx *mm);
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enum sgsn_auth_state sgsn_auth_state(struct sgsn_mm_ctx *mm);
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void sgsn_auth_update(struct sgsn_mm_ctx *mm);
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struct gsm_auth_tuple *sgsn_auth_get_tuple(struct sgsn_mm_ctx *mmctx,
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unsigned key_seq);
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/*
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* GPRS subscriber data
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*/
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#define GPRS_SUBSCRIBER_UPDATE_AUTH_INFO_PENDING (1 << 16)
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#define GPRS_SUBSCRIBER_UPDATE_LOCATION_PENDING (1 << 17)
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#define GPRS_SUBSCRIBER_CANCELLED (1 << 18)
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#define GPRS_SUBSCRIBER_ENABLE_PURGE (1 << 19)
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#define GPRS_SUBSCRIBER_UPDATE_PENDING_MASK ( \
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GPRS_SUBSCRIBER_UPDATE_LOCATION_PENDING | \
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GPRS_SUBSCRIBER_UPDATE_AUTH_INFO_PENDING \
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)
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int gprs_subscr_init(struct sgsn_instance *sgi);
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int gprs_subscr_request_update_location(struct sgsn_mm_ctx *mmctx);
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int gprs_subscr_request_auth_info(struct sgsn_mm_ctx *mmctx);
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void gprs_subscr_cleanup(struct gsm_subscriber *subscr);
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struct gsm_subscriber *gprs_subscr_get_or_create(const char *imsi);
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struct gsm_subscriber *gprs_subscr_get_or_create_by_mmctx( struct sgsn_mm_ctx *mmctx);
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struct gsm_subscriber *gprs_subscr_get_by_imsi(const char *imsi);
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void gprs_subscr_cancel(struct gsm_subscriber *subscr);
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void gprs_subscr_update(struct gsm_subscriber *subscr);
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void gprs_subscr_update_auth_info(struct gsm_subscriber *subscr);
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int gprs_subscr_rx_gsup_message(struct msgb *msg);
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/* Called on subscriber data updates */
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void sgsn_update_subscriber_data(struct sgsn_mm_ctx *mmctx);
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int gprs_sndcp_vty_init(void);
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struct sgsn_instance;
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int sgsn_gtp_init(struct sgsn_instance *sgi);
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#endif /* _GPRS_SGSN_H */
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