Split out GPRS SM layer into its own file
Change-Id: Ie61d22e7868af6de73cdf9c731f07130b282599d
This commit is contained in:
parent
31c4657c97
commit
35f0e664bf
|
@ -14,6 +14,7 @@ noinst_HEADERS = \
|
|||
gprs_llc_xid.h \
|
||||
gprs_ranap.h \
|
||||
gprs_sgsn.h \
|
||||
gprs_sm.h \
|
||||
gprs_sndcp_comp.h \
|
||||
gprs_sndcp_dcomp.h \
|
||||
gprs_sndcp.h \
|
||||
|
|
|
@ -6,21 +6,16 @@
|
|||
|
||||
#include <stdbool.h>
|
||||
|
||||
int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause, bool teardown);
|
||||
int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid,
|
||||
uint8_t cause, uint8_t pco_len, uint8_t *pco_v);
|
||||
int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp);
|
||||
int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp);
|
||||
int gsm48_tx_gmm_auth_ciph_req(struct sgsn_mm_ctx *mm,
|
||||
const struct osmo_auth_vector *vec,
|
||||
uint8_t key_seq, bool force_standby);
|
||||
|
||||
int gsm0408_gprs_rcvmsg_gb(struct msgb *msg, struct gprs_llc_llme *llme,
|
||||
bool drop_cipherable);
|
||||
int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
|
||||
struct gprs_llc_llme *llme);
|
||||
int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
|
||||
struct gprs_llc_llme *llme, bool drop_cipherable);
|
||||
int gsm48_gmm_sendmsg(struct msgb *msg, int command,
|
||||
struct sgsn_mm_ctx *mm, bool encryptable);
|
||||
int gsm0408_gprs_force_reattach(struct sgsn_mm_ctx *mmctx);
|
||||
int gsm0408_gprs_force_reattach_oldmsg(struct msgb *msg,
|
||||
struct gprs_llc_llme *llme);
|
||||
|
@ -47,7 +42,6 @@ int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx);
|
|||
void extract_subscr_msisdn(struct sgsn_mm_ctx *ctx);
|
||||
void extract_subscr_hlr(struct sgsn_mm_ctx *ctx);
|
||||
|
||||
void pdp_ctx_detach_mm_ctx(struct sgsn_pdp_ctx *pdp);
|
||||
|
||||
void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg);
|
||||
void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm);
|
||||
#endif /* _GPRS_GMM_H */
|
||||
|
|
|
@ -0,0 +1,15 @@
|
|||
#pragma once
|
||||
|
||||
#include <osmocom/core/msgb.h>
|
||||
#include <osmocom/sgsn/gprs_sgsn.h>
|
||||
|
||||
int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause, bool teardown);
|
||||
int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid,
|
||||
uint8_t cause, uint8_t pco_len, uint8_t *pco_v);
|
||||
int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp);
|
||||
int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp);
|
||||
|
||||
void pdp_ctx_detach_mm_ctx(struct sgsn_pdp_ctx *pdp);
|
||||
|
||||
int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
|
||||
struct gprs_llc_llme *llme);
|
|
@ -48,6 +48,7 @@ osmo_sgsn_SOURCES = \
|
|||
gprs_mm_state_iu_fsm.c \
|
||||
gprs_ranap.c \
|
||||
gprs_sgsn.c \
|
||||
gprs_sm.c \
|
||||
gprs_sndcp.c \
|
||||
gprs_sndcp_comp.c \
|
||||
gprs_sndcp_dcomp.c \
|
||||
|
|
|
@ -31,6 +31,7 @@
|
|||
#include <osmocom/sgsn/gprs_mm_state_gb_fsm.h>
|
||||
#include <osmocom/sgsn/gprs_sgsn.h>
|
||||
#include <osmocom/sgsn/gprs_gmm.h>
|
||||
#include <osmocom/sgsn/gprs_sm.h>
|
||||
#include <osmocom/sgsn/debug.h>
|
||||
|
||||
/* Main entry point for incoming 04.08 GPRS messages from Gb */
|
||||
|
|
|
@ -29,7 +29,6 @@
|
|||
#include <stdbool.h>
|
||||
#include <netinet/in.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <netdb.h>
|
||||
|
||||
#include "bscconfig.h"
|
||||
|
||||
|
@ -42,7 +41,6 @@
|
|||
#include <osmocom/core/utils.h>
|
||||
#include <osmocom/core/tdef.h>
|
||||
#include <osmocom/crypt/auth.h>
|
||||
#include <osmocom/gsm/apn.h>
|
||||
#include <osmocom/gsm/protocol/gsm_04_08_gprs.h>
|
||||
|
||||
#include <osmocom/gprs/gprs_bssgp.h>
|
||||
|
@ -66,9 +64,6 @@
|
|||
|
||||
#define PTMSI_ALLOC
|
||||
|
||||
/* 3GPP TS 04.08 sec 6.1.3.4.3(.a) "Abnormal cases" */
|
||||
#define T339X_MAX_RETRANS 4
|
||||
|
||||
extern struct sgsn_instance *sgsn;
|
||||
extern void *tall_sgsn_ctx;
|
||||
|
||||
|
@ -91,20 +86,6 @@ static const struct tlv_definition gsm48_gmm_att_tlvdef = {
|
|||
},
|
||||
};
|
||||
|
||||
static const struct tlv_definition gsm48_sm_att_tlvdef = {
|
||||
.def = {
|
||||
[GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 },
|
||||
[GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 },
|
||||
[GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 },
|
||||
[GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 },
|
||||
[GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 },
|
||||
[GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 },
|
||||
[GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_FIXED, 1 },
|
||||
[GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_FIXED, 7 },
|
||||
[GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 },
|
||||
},
|
||||
};
|
||||
|
||||
/* Our implementation, should be kept in SGSN */
|
||||
|
||||
static void mmctx_timer_cb(void *_mm);
|
||||
|
@ -146,7 +127,7 @@ time_t gprs_max_time_to_idle(void)
|
|||
/* Send a message through the underlying layer.
|
||||
* For param encryptable, see 3GPP TS 24.008 § 4.7.1.2 and
|
||||
* gsm48_hdr_gmm_cipherable(). Pass false for not cipherable messages. */
|
||||
static int gsm48_gmm_sendmsg(struct msgb *msg, int command,
|
||||
int gsm48_gmm_sendmsg(struct msgb *msg, int command,
|
||||
struct sgsn_mm_ctx *mm, bool encryptable)
|
||||
{
|
||||
if (mm) {
|
||||
|
@ -199,7 +180,7 @@ void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg)
|
|||
}
|
||||
|
||||
/* Store BVCI/NSEI in MM context */
|
||||
static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm)
|
||||
void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm)
|
||||
{
|
||||
msgb_tlli(msg) = mm->gb.tlli;
|
||||
msgb_bvci(msg) = mm->gb.bvci;
|
||||
|
@ -228,7 +209,7 @@ static void mm_ctx_cleanup_free(struct sgsn_mm_ctx *ctx, const char *log_text)
|
|||
|
||||
/* Chapter 9.4.18 */
|
||||
static int _tx_status(struct msgb *msg, uint8_t cause,
|
||||
struct sgsn_mm_ctx *mmctx, int sm)
|
||||
struct sgsn_mm_ctx *mmctx)
|
||||
{
|
||||
struct gsm48_hdr *gh;
|
||||
|
||||
|
@ -238,13 +219,8 @@ static int _tx_status(struct msgb *msg, uint8_t cause,
|
|||
get_value_string(gsm48_gmm_cause_names, cause));
|
||||
|
||||
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
|
||||
if (sm) {
|
||||
gh->proto_discr = GSM48_PDISC_SM_GPRS;
|
||||
gh->msg_type = GSM48_MT_GSM_STATUS;
|
||||
} else {
|
||||
gh->proto_discr = GSM48_PDISC_MM_GPRS;
|
||||
gh->msg_type = GSM48_MT_GMM_STATUS;
|
||||
}
|
||||
gh->proto_discr = GSM48_PDISC_MM_GPRS;
|
||||
gh->msg_type = GSM48_MT_GMM_STATUS;
|
||||
gh->data[0] = cause;
|
||||
|
||||
return gsm48_gmm_sendmsg(msg, 0, mmctx, true);
|
||||
|
@ -255,15 +231,7 @@ static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause)
|
|||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 GMM STATUS");
|
||||
|
||||
mmctx2msgid(msg, mmctx);
|
||||
return _tx_status(msg, cause, mmctx, 0);
|
||||
}
|
||||
|
||||
static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause)
|
||||
{
|
||||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SM STATUS");
|
||||
|
||||
mmctx2msgid(msg, mmctx);
|
||||
return _tx_status(msg, cause, mmctx, 1);
|
||||
return _tx_status(msg, cause, mmctx);
|
||||
}
|
||||
|
||||
static int _tx_detach_req(struct msgb *msg, uint8_t detach_type, uint8_t cause,
|
||||
|
@ -306,29 +274,6 @@ static int gsm48_tx_gmm_detach_req_oldmsg(struct msgb *oldmsg,
|
|||
return _tx_detach_req(msg, detach_type, cause, NULL);
|
||||
}
|
||||
|
||||
static struct gsm48_qos default_qos = {
|
||||
.delay_class = 4, /* best effort */
|
||||
.reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT,
|
||||
.peak_tput = GSM48_QOS_PEAK_TPUT_32000bps,
|
||||
.preced_class = GSM48_QOS_PC_NORMAL,
|
||||
.mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT,
|
||||
.traf_class = GSM48_QOS_TC_INTERACTIVE,
|
||||
.deliv_order = GSM48_QOS_DO_UNORDERED,
|
||||
.deliv_err_sdu = GSM48_QOS_ERRSDU_YES,
|
||||
.max_sdu_size = GSM48_QOS_MAXSDU_1520,
|
||||
.max_bitrate_up = GSM48_QOS_MBRATE_63k,
|
||||
.max_bitrate_down = GSM48_QOS_MBRATE_63k,
|
||||
.resid_ber = GSM48_QOS_RBER_5e_2,
|
||||
.sdu_err_ratio = GSM48_QOS_SERR_1e_2,
|
||||
.handling_prio = 3,
|
||||
.xfer_delay = 0x10, /* 200ms */
|
||||
.guar_bitrate_up = GSM48_QOS_MBRATE_0k,
|
||||
.guar_bitrate_down = GSM48_QOS_MBRATE_0k,
|
||||
.sig_ind = 0, /* not optimised for signalling */
|
||||
.max_bitrate_down_ext = 0, /* use octet 9 */
|
||||
.guar_bitrate_down_ext = 0, /* use octet 13 */
|
||||
};
|
||||
|
||||
/* Chapter 9.4.2: Attach accept */
|
||||
int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm)
|
||||
{
|
||||
|
@ -2155,645 +2100,6 @@ static void mmctx_timer_cb(void *_mm)
|
|||
}
|
||||
}
|
||||
|
||||
/* GPRS SESSION MANAGEMENT */
|
||||
|
||||
static void pdpctx_timer_cb(void *_mm);
|
||||
|
||||
|
||||
static void pdpctx_timer_rearm(struct sgsn_pdp_ctx *pdp, unsigned int T)
|
||||
{
|
||||
unsigned long seconds;
|
||||
if (osmo_timer_pending(&pdp->timer))
|
||||
LOGPDPCTXP(LOGL_ERROR, pdp, "Scheduling PDP timer %u while old "
|
||||
"timer %u pending\n", T, pdp->T);
|
||||
seconds = osmo_tdef_get(sgsn->cfg.T_defs, T, OSMO_TDEF_S, -1);
|
||||
osmo_timer_schedule(&pdp->timer, seconds, 0);
|
||||
}
|
||||
|
||||
static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T)
|
||||
{
|
||||
if (osmo_timer_pending(&pdp->timer))
|
||||
LOGPDPCTXP(LOGL_ERROR, pdp, "Starting PDP timer %u while old "
|
||||
"timer %u pending\n", T, pdp->T);
|
||||
pdp->T = T;
|
||||
pdp->num_T_exp = 0;
|
||||
|
||||
osmo_timer_setup(&pdp->timer, pdpctx_timer_cb, pdp);
|
||||
pdpctx_timer_rearm(pdp, pdp->T);
|
||||
}
|
||||
|
||||
static void pdpctx_timer_stop(struct sgsn_pdp_ctx *pdp, unsigned int T)
|
||||
{
|
||||
if (pdp->T != T)
|
||||
LOGPDPCTXP(LOGL_ERROR, pdp, "Stopping PDP timer %u but "
|
||||
"%u is running\n", T, pdp->T);
|
||||
osmo_timer_del(&pdp->timer);
|
||||
}
|
||||
|
||||
void pdp_ctx_detach_mm_ctx(struct sgsn_pdp_ctx *pdp)
|
||||
{
|
||||
/* Detach from MM context */
|
||||
llist_del(&pdp->list);
|
||||
pdp->mm = NULL;
|
||||
|
||||
/* stop timer 3395 */
|
||||
pdpctx_timer_stop(pdp, 3395);
|
||||
}
|
||||
|
||||
#if 0
|
||||
static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr)
|
||||
{
|
||||
uint8_t v[6];
|
||||
|
||||
v[0] = PDP_TYPE_ORG_IETF;
|
||||
v[1] = PDP_TYPE_N_IETF_IPv4;
|
||||
*(uint32_t *)(v+2) = htonl(ipaddr);
|
||||
|
||||
msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v);
|
||||
}
|
||||
|
||||
static void msgb_put_pdp_addr_ppp(struct msgb *msg)
|
||||
{
|
||||
uint8_t v[2];
|
||||
|
||||
v[0] = PDP_TYPE_ORG_ETSI;
|
||||
v[1] = PDP_TYPE_N_ETSI_PPP;
|
||||
|
||||
msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.2: Activate PDP Context Accept */
|
||||
int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp)
|
||||
{
|
||||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP ACC");
|
||||
struct gsm48_hdr *gh;
|
||||
uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */
|
||||
|
||||
LOGPDPCTXP(LOGL_INFO, pdp, "<- ACTIVATE PDP CONTEXT ACK\n");
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_ACCEPT]);
|
||||
|
||||
mmctx2msgid(msg, pdp->mm);
|
||||
|
||||
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
||||
gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
|
||||
gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK;
|
||||
|
||||
/* Negotiated LLC SAPI */
|
||||
msgb_v_put(msg, pdp->sapi);
|
||||
|
||||
/* FIXME: copy QoS parameters from original request */
|
||||
//msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v);
|
||||
msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos);
|
||||
|
||||
/* Radio priority 10.5.7.2 */
|
||||
msgb_v_put(msg, pdp->lib->radio_pri);
|
||||
|
||||
/* PDP address */
|
||||
/* Highest 4 bits of first byte need to be set to 1, otherwise
|
||||
* the IE is identical with the 04.08 PDP Address IE */
|
||||
pdp->lib->eua.v[0] &= ~0xf0;
|
||||
msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR,
|
||||
pdp->lib->eua.l, pdp->lib->eua.v);
|
||||
pdp->lib->eua.v[0] |= 0xf0;
|
||||
|
||||
/* Optional: Protocol configuration options (FIXME: why 'req') */
|
||||
if (pdp->lib->pco_req.l)
|
||||
msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT,
|
||||
pdp->lib->pco_req.l, pdp->lib->pco_req.v);
|
||||
|
||||
/* Optional: Packet Flow Identifier */
|
||||
|
||||
return gsm48_gmm_sendmsg(msg, 0, pdp->mm, true);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.3: Activate PDP Context reject */
|
||||
int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid,
|
||||
uint8_t cause, uint8_t pco_len, uint8_t *pco_v)
|
||||
{
|
||||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP REJ");
|
||||
struct gsm48_hdr *gh;
|
||||
uint8_t transaction_id = tid ^ 0x8; /* flip */
|
||||
|
||||
LOGMMCTXP(LOGL_NOTICE, mm, "<- ACTIVATE PDP CONTEXT REJ: %s\n",
|
||||
get_value_string(gsm48_gsm_cause_names, cause));
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REJECT]);
|
||||
|
||||
mmctx2msgid(msg, mm);
|
||||
|
||||
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
||||
gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
|
||||
gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ;
|
||||
|
||||
msgb_v_put(msg, cause);
|
||||
if (pco_len && pco_v)
|
||||
msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v);
|
||||
|
||||
return gsm48_gmm_sendmsg(msg, 0, mm, true);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.8: Deactivate PDP Context Request */
|
||||
static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid,
|
||||
uint8_t sm_cause, bool teardown)
|
||||
{
|
||||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP DET REQ");
|
||||
struct gsm48_hdr *gh;
|
||||
uint8_t transaction_id = tid ^ 0x8; /* flip */
|
||||
uint8_t tear_down_ind = (0x9 << 4) | (!!teardown);
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT REQ\n");
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_REQUEST]);
|
||||
|
||||
mmctx2msgid(msg, mm);
|
||||
|
||||
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
||||
gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
|
||||
gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ;
|
||||
|
||||
msgb_v_put(msg, sm_cause);
|
||||
msgb_v_put(msg, tear_down_ind);
|
||||
|
||||
return gsm48_gmm_sendmsg(msg, 0, mm, true);
|
||||
}
|
||||
int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause, bool teardown)
|
||||
{
|
||||
pdpctx_timer_start(pdp, 3395);
|
||||
|
||||
return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause, teardown);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.9: Deactivate PDP Context Accept */
|
||||
static int _gsm48_tx_gsm_deact_pdp_acc(struct sgsn_mm_ctx *mm, uint8_t tid)
|
||||
{
|
||||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP DET ACC");
|
||||
struct gsm48_hdr *gh;
|
||||
uint8_t transaction_id = tid ^ 0x8; /* flip */
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT ACK\n");
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_ACCEPT]);
|
||||
|
||||
mmctx2msgid(msg, mm);
|
||||
|
||||
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
||||
gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
|
||||
gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK;
|
||||
|
||||
return gsm48_gmm_sendmsg(msg, 0, mm, true);
|
||||
}
|
||||
int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp)
|
||||
{
|
||||
return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti);
|
||||
}
|
||||
|
||||
static int activate_ggsn(struct sgsn_mm_ctx *mmctx,
|
||||
struct sgsn_ggsn_ctx *ggsn, const uint8_t transaction_id,
|
||||
const uint8_t req_nsapi, const uint8_t req_llc_sapi,
|
||||
struct tlv_parsed *tp, int destroy_ggsn)
|
||||
{
|
||||
struct sgsn_pdp_ctx *pdp;
|
||||
|
||||
LOGMMCTXP(LOGL_DEBUG, mmctx, "Using GGSN %u\n", ggsn->id);
|
||||
ggsn->gsn = sgsn->gsn;
|
||||
pdp = sgsn_create_pdp_ctx(ggsn, mmctx, req_nsapi, tp);
|
||||
if (!pdp)
|
||||
return -1;
|
||||
|
||||
/* Store SAPI and Transaction Identifier */
|
||||
pdp->sapi = req_llc_sapi;
|
||||
pdp->ti = transaction_id;
|
||||
pdp->destroy_ggsn = destroy_ggsn;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ggsn_lookup_cb(void *arg, int status, int timeouts, struct hostent *hostent)
|
||||
{
|
||||
struct sgsn_ggsn_ctx *ggsn;
|
||||
struct sgsn_ggsn_lookup *lookup = arg;
|
||||
struct in_addr *addr = NULL;
|
||||
char buf[INET_ADDRSTRLEN];
|
||||
|
||||
/* The context is gone while we made a request */
|
||||
if (!lookup->mmctx) {
|
||||
talloc_free(lookup->orig_msg);
|
||||
talloc_free(lookup);
|
||||
return;
|
||||
}
|
||||
|
||||
if (status != ARES_SUCCESS) {
|
||||
struct sgsn_mm_ctx *mmctx = lookup->mmctx;
|
||||
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "DNS query failed.\n");
|
||||
|
||||
/* Need to try with three digits now */
|
||||
if (lookup->state == SGSN_GGSN_2DIGIT) {
|
||||
char *hostname;
|
||||
int rc;
|
||||
|
||||
lookup->state = SGSN_GGSN_3DIGIT;
|
||||
hostname = osmo_apn_qualify_from_imsi(mmctx->imsi,
|
||||
lookup->apn_str, 1);
|
||||
LOGMMCTXP(LOGL_DEBUG, mmctx,
|
||||
"Going to query %s\n", hostname);
|
||||
rc = sgsn_ares_query(sgsn, hostname,
|
||||
ggsn_lookup_cb, lookup);
|
||||
if (rc != 0) {
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't start GGSN\n");
|
||||
goto reject_due_failure;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't resolve GGSN\n");
|
||||
goto reject_due_failure;
|
||||
}
|
||||
|
||||
if (hostent->h_length != sizeof(struct in_addr)) {
|
||||
LOGMMCTXP(LOGL_ERROR, lookup->mmctx,
|
||||
"Wrong addr size(%zu)\n", sizeof(struct in_addr));
|
||||
goto reject_due_failure;
|
||||
}
|
||||
|
||||
/* Get the first addr from the list */
|
||||
addr = (struct in_addr *) hostent->h_addr_list[0];
|
||||
if (!addr) {
|
||||
LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "No host address.\n");
|
||||
goto reject_due_failure;
|
||||
}
|
||||
|
||||
ggsn = sgsn_ggsn_ctx_alloc(UINT32_MAX);
|
||||
if (!ggsn) {
|
||||
LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "Failed to create ggsn.\n");
|
||||
goto reject_due_failure;
|
||||
}
|
||||
ggsn->remote_addr = *addr;
|
||||
LOGMMCTXP(LOGL_NOTICE, lookup->mmctx,
|
||||
"Selected %s as GGSN.\n",
|
||||
inet_ntop(AF_INET, addr, buf, sizeof(buf)));
|
||||
|
||||
/* forget about the ggsn look-up */
|
||||
lookup->mmctx->ggsn_lookup = NULL;
|
||||
|
||||
activate_ggsn(lookup->mmctx, ggsn, lookup->ti, lookup->nsapi,
|
||||
lookup->sapi, &lookup->tp, 1);
|
||||
|
||||
/* Now free it */
|
||||
talloc_free(lookup->orig_msg);
|
||||
talloc_free(lookup);
|
||||
return;
|
||||
|
||||
reject_due_failure:
|
||||
gsm48_tx_gsm_act_pdp_rej(lookup->mmctx, lookup->ti,
|
||||
GMM_CAUSE_NET_FAIL, 0, NULL);
|
||||
lookup->mmctx->ggsn_lookup = NULL;
|
||||
talloc_free(lookup->orig_msg);
|
||||
talloc_free(lookup);
|
||||
}
|
||||
|
||||
static int do_act_pdp_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, bool *delete)
|
||||
{
|
||||
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
|
||||
struct gsm48_act_pdp_ctx_req *act_req = (struct gsm48_act_pdp_ctx_req *) gh->data;
|
||||
uint8_t req_qos_len, req_pdpa_len;
|
||||
uint8_t *req_qos, *req_pdpa;
|
||||
struct tlv_parsed tp;
|
||||
uint8_t transaction_id = gsm48_hdr_trans_id(gh);
|
||||
struct sgsn_ggsn_ctx *ggsn;
|
||||
struct sgsn_pdp_ctx *pdp;
|
||||
enum gsm48_gsm_cause gsm_cause;
|
||||
char apn_str[GSM_APN_LENGTH] = { 0, };
|
||||
char *hostname;
|
||||
int rc;
|
||||
struct gprs_llc_lle *lle;
|
||||
char buf[INET_ADDRSTRLEN];
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, mmctx, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ",
|
||||
act_req->req_llc_sapi, act_req->req_nsapi);
|
||||
|
||||
/* FIXME: length checks! */
|
||||
req_qos_len = act_req->data[0];
|
||||
req_qos = act_req->data + 1; /* 10.5.6.5 */
|
||||
req_pdpa_len = act_req->data[1 + req_qos_len];
|
||||
req_pdpa = act_req->data + 1 + req_qos_len + 1; /* 10.5.6.4 */
|
||||
|
||||
switch (req_pdpa[0] & 0xf) {
|
||||
case 0x0:
|
||||
DEBUGPC(DMM, "ETSI ");
|
||||
break;
|
||||
case 0x1:
|
||||
DEBUGPC(DMM, "IETF ");
|
||||
break;
|
||||
case 0xf:
|
||||
DEBUGPC(DMM, "Empty ");
|
||||
break;
|
||||
}
|
||||
|
||||
switch (req_pdpa[1]) {
|
||||
case 0x21:
|
||||
DEBUGPC(DMM, "IPv4 ");
|
||||
if (req_pdpa_len >= 6) {
|
||||
struct in_addr ia;
|
||||
ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2)));
|
||||
DEBUGPC(DMM, "%s ", inet_ntop(AF_INET, &ia, buf, sizeof(buf)));
|
||||
}
|
||||
break;
|
||||
case 0x57:
|
||||
DEBUGPC(DMM, "IPv6 ");
|
||||
if (req_pdpa_len >= 18) {
|
||||
/* FIXME: print IPv6 address */
|
||||
}
|
||||
break;
|
||||
default:
|
||||
DEBUGPC(DMM, "0x%02x ", req_pdpa[1]);
|
||||
break;
|
||||
}
|
||||
|
||||
LOGPC(DMM, LOGL_INFO, "\n");
|
||||
|
||||
/* Check if NSAPI is out of range (TS 04.65 / 7.2) */
|
||||
if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) {
|
||||
/* Send reject with GSM_CAUSE_INV_MAND_INFO */
|
||||
return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id,
|
||||
GSM_CAUSE_INV_MAND_INFO,
|
||||
0, NULL);
|
||||
}
|
||||
|
||||
/* Optional: Access Point Name, Protocol Config Options */
|
||||
if (req_pdpa + req_pdpa_len < msg->data + msg->len)
|
||||
tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len,
|
||||
(msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0);
|
||||
else
|
||||
memset(&tp, 0, sizeof(tp));
|
||||
|
||||
|
||||
/* put the non-TLV elements in the TLV parser structure to
|
||||
* pass them on to the SGSN / GTP code */
|
||||
tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len;
|
||||
tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos;
|
||||
tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len;
|
||||
tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa;
|
||||
|
||||
/* Check if NSAPI is already in use */
|
||||
pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi);
|
||||
if (pdp) {
|
||||
/* We already have a PDP context for this TLLI + NSAPI tuple */
|
||||
if (pdp->sapi == act_req->req_llc_sapi &&
|
||||
pdp->ti == transaction_id) {
|
||||
/* This apparently is a re-transmission of a PDP CTX
|
||||
* ACT REQ (our ACT ACK must have got dropped) */
|
||||
rc = gsm48_tx_gsm_act_pdp_acc(pdp);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
|
||||
if (pdp->mm->ran_type == MM_CTX_T_GERAN_Gb) {
|
||||
/* Also re-transmit the SNDCP XID message */
|
||||
lle = &pdp->mm->gb.llme->lle[pdp->sapi];
|
||||
rc = sndcp_sn_xid_req(lle,pdp->nsapi);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Send reject with GSM_CAUSE_NSAPI_IN_USE */
|
||||
return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id,
|
||||
GSM_CAUSE_NSAPI_IN_USE,
|
||||
0, NULL);
|
||||
}
|
||||
|
||||
if (mmctx->ggsn_lookup) {
|
||||
if (mmctx->ggsn_lookup->sapi == act_req->req_llc_sapi &&
|
||||
mmctx->ggsn_lookup->ti == transaction_id) {
|
||||
LOGMMCTXP(LOGL_NOTICE, mmctx,
|
||||
"Re-transmission while doing look-up. Ignoring.\n");
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/* Only increment counter for a real activation, after we checked
|
||||
* for re-transmissions */
|
||||
rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]);
|
||||
|
||||
/* Determine GGSN based on APN and subscription options */
|
||||
ggsn = sgsn_mm_ctx_find_ggsn_ctx(mmctx, &tp, &gsm_cause, apn_str);
|
||||
if (ggsn)
|
||||
return activate_ggsn(mmctx, ggsn, transaction_id,
|
||||
act_req->req_nsapi, act_req->req_llc_sapi,
|
||||
&tp, 0);
|
||||
|
||||
if (strlen(apn_str) == 0)
|
||||
goto no_context;
|
||||
if (!sgsn->cfg.dynamic_lookup)
|
||||
goto no_context;
|
||||
|
||||
/* schedule a dynamic look-up */
|
||||
mmctx->ggsn_lookup = talloc_zero(tall_sgsn_ctx, struct sgsn_ggsn_lookup);
|
||||
if (!mmctx->ggsn_lookup)
|
||||
goto no_context;
|
||||
|
||||
mmctx->ggsn_lookup->state = SGSN_GGSN_2DIGIT;
|
||||
mmctx->ggsn_lookup->mmctx = mmctx;
|
||||
strcpy(mmctx->ggsn_lookup->apn_str, apn_str);
|
||||
|
||||
mmctx->ggsn_lookup->orig_msg = msg;
|
||||
mmctx->ggsn_lookup->tp = tp;
|
||||
|
||||
mmctx->ggsn_lookup->ti = transaction_id;
|
||||
mmctx->ggsn_lookup->nsapi = act_req->req_nsapi;
|
||||
mmctx->ggsn_lookup->sapi = act_req->req_llc_sapi;
|
||||
|
||||
hostname = osmo_apn_qualify_from_imsi(mmctx->imsi,
|
||||
mmctx->ggsn_lookup->apn_str, 0);
|
||||
|
||||
LOGMMCTXP(LOGL_DEBUG, mmctx, "Going to query %s\n", hostname);
|
||||
rc = sgsn_ares_query(sgsn, hostname,
|
||||
ggsn_lookup_cb, mmctx->ggsn_lookup);
|
||||
if (rc != 0) {
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "Failed to start ares query.\n");
|
||||
goto no_context;
|
||||
}
|
||||
*delete = 0;
|
||||
|
||||
return 0;
|
||||
|
||||
no_context:
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "No GGSN context found!\n");
|
||||
return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id,
|
||||
gsm_cause, 0, NULL);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.1: Activate PDP Context Request */
|
||||
static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx,
|
||||
struct msgb *_msg)
|
||||
{
|
||||
bool delete = 1;
|
||||
struct msgb *msg;
|
||||
int rc;
|
||||
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REQUEST]);
|
||||
|
||||
/*
|
||||
* This is painful. We might not have a static GGSN
|
||||
* configuration and then would need to copy the msg
|
||||
* and re-do most of this routine (or call it again
|
||||
* and make sure it only goes through the dynamic
|
||||
* resolving. The question is what to optimize for
|
||||
* and the dynamic resolution will be the right thing
|
||||
* in the long run.
|
||||
*/
|
||||
msg = bssgp_msgb_copy(_msg, __func__);
|
||||
if (!msg) {
|
||||
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(_msg);
|
||||
uint8_t transaction_id = gsm48_hdr_trans_id(gh);
|
||||
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "-> ACTIVATE PDP CONTEXT REQ failed copy.\n");
|
||||
/* Send reject with GSM_CAUSE_INV_MAND_INFO */
|
||||
return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id,
|
||||
GSM_CAUSE_NET_FAIL,
|
||||
0, NULL);
|
||||
}
|
||||
|
||||
rc = do_act_pdp_req(mmctx, msg, &delete);
|
||||
if (delete)
|
||||
msgb_free(msg);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.8: Deactivate PDP Context Request */
|
||||
static int gsm48_rx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, struct msgb *msg)
|
||||
{
|
||||
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
|
||||
uint8_t transaction_id = gsm48_hdr_trans_id(gh);
|
||||
struct sgsn_pdp_ctx *pdp;
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n",
|
||||
get_value_string(gsm48_gsm_cause_names, gh->data[0]));
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_REQUEST]);
|
||||
|
||||
pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id);
|
||||
if (!pdp) {
|
||||
LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Request for "
|
||||
"non-existing PDP Context (IMSI=%s, TI=%u)\n",
|
||||
mm->imsi, transaction_id);
|
||||
return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id);
|
||||
}
|
||||
|
||||
return sgsn_delete_pdp_ctx(pdp);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.9: Deactivate PDP Context Accept */
|
||||
static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg)
|
||||
{
|
||||
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
|
||||
uint8_t transaction_id = gsm48_hdr_trans_id(gh);
|
||||
struct sgsn_pdp_ctx *pdp;
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT ACK\n");
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_ACCEPT]);
|
||||
|
||||
pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id);
|
||||
if (!pdp) {
|
||||
LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Accept for "
|
||||
"non-existing PDP Context (IMSI=%s, TI=%u)\n",
|
||||
mm->imsi, transaction_id);
|
||||
return 0;
|
||||
}
|
||||
/* stop timer 3395 */
|
||||
pdpctx_timer_stop(pdp, 3395);
|
||||
if (pdp->ggsn)
|
||||
return sgsn_delete_pdp_ctx(pdp);
|
||||
/* GTP side already detached, freeing */
|
||||
sgsn_pdp_ctx_free(pdp);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gsm48_rx_gsm_status(struct sgsn_mm_ctx *ctx, struct msgb *msg)
|
||||
{
|
||||
struct gsm48_hdr *gh = msgb_l3(msg);
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS SM STATUS (cause: %s)\n",
|
||||
get_value_string(gsm48_gsm_cause_names, gh->data[0]));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void pdpctx_timer_cb(void *_pdp)
|
||||
{
|
||||
struct sgsn_pdp_ctx *pdp = _pdp;
|
||||
|
||||
pdp->num_T_exp++;
|
||||
|
||||
switch (pdp->T) {
|
||||
case 3395: /* waiting for PDP CTX DEACT ACK */
|
||||
if (pdp->num_T_exp > T339X_MAX_RETRANS) {
|
||||
LOGPDPCTXP(LOGL_NOTICE, pdp, "T3395 expired > %d times\n", T339X_MAX_RETRANS);
|
||||
pdp->state = PDP_STATE_INACTIVE;
|
||||
if (pdp->ggsn)
|
||||
sgsn_delete_pdp_ctx(pdp);
|
||||
else
|
||||
sgsn_pdp_ctx_free(pdp);
|
||||
break;
|
||||
}
|
||||
_gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, GSM_CAUSE_NET_FAIL, true);
|
||||
pdpctx_timer_rearm(pdp, 3395);
|
||||
break;
|
||||
default:
|
||||
LOGPDPCTXP(LOGL_ERROR, pdp, "timer expired in unknown mode %u\n",
|
||||
pdp->T);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* GPRS Session Management */
|
||||
int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
|
||||
struct gprs_llc_llme *llme)
|
||||
{
|
||||
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
|
||||
int rc;
|
||||
|
||||
/* MMCTX can be NULL when called */
|
||||
|
||||
if (!mmctx) {
|
||||
LOGGBIUP(llme, msg, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n");
|
||||
/* 6.1.3.6 */
|
||||
if (gh->msg_type == GSM48_MT_GSM_STATUS)
|
||||
return 0;
|
||||
|
||||
return gsm0408_gprs_force_reattach_oldmsg(msg, llme);
|
||||
}
|
||||
|
||||
switch (gh->msg_type) {
|
||||
case GSM48_MT_GSM_ACT_PDP_REQ:
|
||||
rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg);
|
||||
break;
|
||||
case GSM48_MT_GSM_DEACT_PDP_REQ:
|
||||
rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg);
|
||||
break;
|
||||
case GSM48_MT_GSM_DEACT_PDP_ACK:
|
||||
rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg);
|
||||
break;
|
||||
case GSM48_MT_GSM_STATUS:
|
||||
rc = gsm48_rx_gsm_status(mmctx, msg);
|
||||
break;
|
||||
case GSM48_MT_GSM_REQ_PDP_ACT_REJ:
|
||||
case GSM48_MT_GSM_ACT_AA_PDP_REQ:
|
||||
case GSM48_MT_GSM_DEACT_AA_PDP_REQ:
|
||||
LOGMMCTXP(LOGL_NOTICE, mmctx, "Unimplemented GSM 04.08 GSM msg type 0x%02x: %s\n",
|
||||
gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg)));
|
||||
rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL);
|
||||
break;
|
||||
default:
|
||||
LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GSM msg type 0x%02x: %s\n",
|
||||
gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg)));
|
||||
rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL);
|
||||
break;
|
||||
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
int gsm0408_gprs_force_reattach_oldmsg(struct msgb *msg,
|
||||
struct gprs_llc_llme *llme)
|
||||
{
|
||||
|
|
|
@ -32,6 +32,7 @@
|
|||
#include <osmocom/ranap/ranap_common.h>
|
||||
|
||||
#include <osmocom/sgsn/gprs_gmm.h>
|
||||
#include <osmocom/sgsn/gprs_sm.h>
|
||||
#include <osmocom/sgsn/debug.h>
|
||||
#include <osmocom/sgsn/sgsn.h>
|
||||
#include <osmocom/sgsn/gprs_ranap.h>
|
||||
|
|
|
@ -39,6 +39,7 @@
|
|||
#include <osmocom/sgsn/gprs_sgsn.h>
|
||||
#include <osmocom/sgsn/sgsn.h>
|
||||
#include <osmocom/sgsn/gprs_gmm.h>
|
||||
#include <osmocom/sgsn/gprs_sm.h>
|
||||
#include <osmocom/sgsn/gprs_utils.h>
|
||||
#include <osmocom/sgsn/signal.h>
|
||||
#include <osmocom/sgsn/gprs_gmm_attach.h>
|
||||
|
|
|
@ -0,0 +1,749 @@
|
|||
/* Section "9.5 GPRS Session Management Messages"
|
||||
* 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */
|
||||
|
||||
/* (C) 2009-2015 by Harald Welte <laforge@gnumonks.org>
|
||||
* (C) 2010 by On-Waves
|
||||
* (C) 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
|
||||
*
|
||||
* All Rights Reserved
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Affero General Public License as published by
|
||||
* the Free Software Foundation; either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Affero General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Affero General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <netinet/in.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <netdb.h>
|
||||
|
||||
#include "bscconfig.h"
|
||||
|
||||
#include <osmocom/core/rate_ctr.h>
|
||||
#include <osmocom/core/tdef.h>
|
||||
#include <osmocom/gsm/apn.h>
|
||||
#include <osmocom/gprs/gprs_bssgp.h>
|
||||
|
||||
#include <osmocom/sgsn/gprs_sm.h>
|
||||
#include <osmocom/sgsn/gprs_gmm.h>
|
||||
#include <osmocom/sgsn/gprs_utils.h>
|
||||
#include <osmocom/sgsn/sgsn.h>
|
||||
#include <osmocom/sgsn/debug.h>
|
||||
#include <osmocom/sgsn/gprs_llc.h>
|
||||
#include <osmocom/sgsn/gprs_sndcp.h>
|
||||
#include <osmocom/sgsn/gprs_ranap.h>
|
||||
|
||||
extern void *tall_sgsn_ctx;
|
||||
|
||||
/* 3GPP TS 04.08 sec 6.1.3.4.3(.a) "Abnormal cases" */
|
||||
#define T339X_MAX_RETRANS 4
|
||||
|
||||
static const struct tlv_definition gsm48_sm_att_tlvdef = {
|
||||
.def = {
|
||||
[GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 },
|
||||
[GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 },
|
||||
[GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 },
|
||||
[GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 },
|
||||
[GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 },
|
||||
[GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 },
|
||||
[GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_FIXED, 1 },
|
||||
[GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_FIXED, 7 },
|
||||
[GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 },
|
||||
},
|
||||
};
|
||||
|
||||
static struct gsm48_qos default_qos = {
|
||||
.delay_class = 4, /* best effort */
|
||||
.reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT,
|
||||
.peak_tput = GSM48_QOS_PEAK_TPUT_32000bps,
|
||||
.preced_class = GSM48_QOS_PC_NORMAL,
|
||||
.mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT,
|
||||
.traf_class = GSM48_QOS_TC_INTERACTIVE,
|
||||
.deliv_order = GSM48_QOS_DO_UNORDERED,
|
||||
.deliv_err_sdu = GSM48_QOS_ERRSDU_YES,
|
||||
.max_sdu_size = GSM48_QOS_MAXSDU_1520,
|
||||
.max_bitrate_up = GSM48_QOS_MBRATE_63k,
|
||||
.max_bitrate_down = GSM48_QOS_MBRATE_63k,
|
||||
.resid_ber = GSM48_QOS_RBER_5e_2,
|
||||
.sdu_err_ratio = GSM48_QOS_SERR_1e_2,
|
||||
.handling_prio = 3,
|
||||
.xfer_delay = 0x10, /* 200ms */
|
||||
.guar_bitrate_up = GSM48_QOS_MBRATE_0k,
|
||||
.guar_bitrate_down = GSM48_QOS_MBRATE_0k,
|
||||
.sig_ind = 0, /* not optimised for signalling */
|
||||
.max_bitrate_down_ext = 0, /* use octet 9 */
|
||||
.guar_bitrate_down_ext = 0, /* use octet 13 */
|
||||
};
|
||||
|
||||
/* GPRS SESSION MANAGEMENT */
|
||||
|
||||
static void pdpctx_timer_cb(void *_mm);
|
||||
|
||||
static void pdpctx_timer_rearm(struct sgsn_pdp_ctx *pdp, unsigned int T)
|
||||
{
|
||||
unsigned long seconds;
|
||||
if (osmo_timer_pending(&pdp->timer))
|
||||
LOGPDPCTXP(LOGL_ERROR, pdp, "Scheduling PDP timer %u while old "
|
||||
"timer %u pending\n", T, pdp->T);
|
||||
seconds = osmo_tdef_get(sgsn->cfg.T_defs, T, OSMO_TDEF_S, -1);
|
||||
osmo_timer_schedule(&pdp->timer, seconds, 0);
|
||||
}
|
||||
|
||||
static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T)
|
||||
{
|
||||
if (osmo_timer_pending(&pdp->timer))
|
||||
LOGPDPCTXP(LOGL_ERROR, pdp, "Starting PDP timer %u while old "
|
||||
"timer %u pending\n", T, pdp->T);
|
||||
pdp->T = T;
|
||||
pdp->num_T_exp = 0;
|
||||
|
||||
osmo_timer_setup(&pdp->timer, pdpctx_timer_cb, pdp);
|
||||
pdpctx_timer_rearm(pdp, pdp->T);
|
||||
}
|
||||
|
||||
static void pdpctx_timer_stop(struct sgsn_pdp_ctx *pdp, unsigned int T)
|
||||
{
|
||||
if (pdp->T != T)
|
||||
LOGPDPCTXP(LOGL_ERROR, pdp, "Stopping PDP timer %u but "
|
||||
"%u is running\n", T, pdp->T);
|
||||
osmo_timer_del(&pdp->timer);
|
||||
}
|
||||
|
||||
void pdp_ctx_detach_mm_ctx(struct sgsn_pdp_ctx *pdp)
|
||||
{
|
||||
/* Detach from MM context */
|
||||
llist_del(&pdp->list);
|
||||
pdp->mm = NULL;
|
||||
|
||||
/* stop timer 3395 */
|
||||
pdpctx_timer_stop(pdp, 3395);
|
||||
}
|
||||
|
||||
#if 0
|
||||
static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr)
|
||||
{
|
||||
uint8_t v[6];
|
||||
|
||||
v[0] = PDP_TYPE_ORG_IETF;
|
||||
v[1] = PDP_TYPE_N_IETF_IPv4;
|
||||
*(uint32_t *)(v+2) = htonl(ipaddr);
|
||||
|
||||
msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v);
|
||||
}
|
||||
|
||||
static void msgb_put_pdp_addr_ppp(struct msgb *msg)
|
||||
{
|
||||
uint8_t v[2];
|
||||
|
||||
v[0] = PDP_TYPE_ORG_ETSI;
|
||||
v[1] = PDP_TYPE_N_ETSI_PPP;
|
||||
|
||||
msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Chapter 9.4.18 */
|
||||
static int _tx_status(struct msgb *msg, uint8_t cause,
|
||||
struct sgsn_mm_ctx *mmctx)
|
||||
{
|
||||
struct gsm48_hdr *gh;
|
||||
|
||||
/* MMCTX might be NULL! */
|
||||
|
||||
DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n",
|
||||
get_value_string(gsm48_gmm_cause_names, cause));
|
||||
|
||||
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
|
||||
gh->proto_discr = GSM48_PDISC_SM_GPRS;
|
||||
gh->msg_type = GSM48_MT_GSM_STATUS;
|
||||
gh->data[0] = cause;
|
||||
|
||||
return gsm48_gmm_sendmsg(msg, 0, mmctx, true);
|
||||
}
|
||||
|
||||
static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause)
|
||||
{
|
||||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SM STATUS");
|
||||
|
||||
mmctx2msgid(msg, mmctx);
|
||||
return _tx_status(msg, cause, mmctx);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.2: Activate PDP Context Accept */
|
||||
int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp)
|
||||
{
|
||||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP ACC");
|
||||
struct gsm48_hdr *gh;
|
||||
uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */
|
||||
|
||||
LOGPDPCTXP(LOGL_INFO, pdp, "<- ACTIVATE PDP CONTEXT ACK\n");
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_ACCEPT]);
|
||||
|
||||
mmctx2msgid(msg, pdp->mm);
|
||||
|
||||
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
||||
gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
|
||||
gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK;
|
||||
|
||||
/* Negotiated LLC SAPI */
|
||||
msgb_v_put(msg, pdp->sapi);
|
||||
|
||||
/* FIXME: copy QoS parameters from original request */
|
||||
//msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v);
|
||||
msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos);
|
||||
|
||||
/* Radio priority 10.5.7.2 */
|
||||
msgb_v_put(msg, pdp->lib->radio_pri);
|
||||
|
||||
/* PDP address */
|
||||
/* Highest 4 bits of first byte need to be set to 1, otherwise
|
||||
* the IE is identical with the 04.08 PDP Address IE */
|
||||
pdp->lib->eua.v[0] &= ~0xf0;
|
||||
msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR,
|
||||
pdp->lib->eua.l, pdp->lib->eua.v);
|
||||
pdp->lib->eua.v[0] |= 0xf0;
|
||||
|
||||
/* Optional: Protocol configuration options (FIXME: why 'req') */
|
||||
if (pdp->lib->pco_req.l)
|
||||
msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT,
|
||||
pdp->lib->pco_req.l, pdp->lib->pco_req.v);
|
||||
|
||||
/* Optional: Packet Flow Identifier */
|
||||
|
||||
return gsm48_gmm_sendmsg(msg, 0, pdp->mm, true);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.3: Activate PDP Context reject */
|
||||
int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid,
|
||||
uint8_t cause, uint8_t pco_len, uint8_t *pco_v)
|
||||
{
|
||||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP REJ");
|
||||
struct gsm48_hdr *gh;
|
||||
uint8_t transaction_id = tid ^ 0x8; /* flip */
|
||||
|
||||
LOGMMCTXP(LOGL_NOTICE, mm, "<- ACTIVATE PDP CONTEXT REJ: %s\n",
|
||||
get_value_string(gsm48_gsm_cause_names, cause));
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REJECT]);
|
||||
|
||||
mmctx2msgid(msg, mm);
|
||||
|
||||
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
||||
gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
|
||||
gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ;
|
||||
|
||||
msgb_v_put(msg, cause);
|
||||
if (pco_len && pco_v)
|
||||
msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v);
|
||||
|
||||
return gsm48_gmm_sendmsg(msg, 0, mm, true);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.8: Deactivate PDP Context Request */
|
||||
static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid,
|
||||
uint8_t sm_cause, bool teardown)
|
||||
{
|
||||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP DET REQ");
|
||||
struct gsm48_hdr *gh;
|
||||
uint8_t transaction_id = tid ^ 0x8; /* flip */
|
||||
uint8_t tear_down_ind = (0x9 << 4) | (!!teardown);
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT REQ\n");
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_REQUEST]);
|
||||
|
||||
mmctx2msgid(msg, mm);
|
||||
|
||||
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
||||
gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
|
||||
gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ;
|
||||
|
||||
msgb_v_put(msg, sm_cause);
|
||||
msgb_v_put(msg, tear_down_ind);
|
||||
|
||||
return gsm48_gmm_sendmsg(msg, 0, mm, true);
|
||||
}
|
||||
int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause, bool teardown)
|
||||
{
|
||||
pdpctx_timer_start(pdp, 3395);
|
||||
|
||||
return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause, teardown);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.9: Deactivate PDP Context Accept */
|
||||
static int _gsm48_tx_gsm_deact_pdp_acc(struct sgsn_mm_ctx *mm, uint8_t tid)
|
||||
{
|
||||
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP DET ACC");
|
||||
struct gsm48_hdr *gh;
|
||||
uint8_t transaction_id = tid ^ 0x8; /* flip */
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT ACK\n");
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_ACCEPT]);
|
||||
|
||||
mmctx2msgid(msg, mm);
|
||||
|
||||
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
||||
gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4);
|
||||
gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK;
|
||||
|
||||
return gsm48_gmm_sendmsg(msg, 0, mm, true);
|
||||
}
|
||||
int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp)
|
||||
{
|
||||
return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti);
|
||||
}
|
||||
|
||||
static int activate_ggsn(struct sgsn_mm_ctx *mmctx,
|
||||
struct sgsn_ggsn_ctx *ggsn, const uint8_t transaction_id,
|
||||
const uint8_t req_nsapi, const uint8_t req_llc_sapi,
|
||||
struct tlv_parsed *tp, int destroy_ggsn)
|
||||
{
|
||||
struct sgsn_pdp_ctx *pdp;
|
||||
|
||||
LOGMMCTXP(LOGL_DEBUG, mmctx, "Using GGSN %u\n", ggsn->id);
|
||||
ggsn->gsn = sgsn->gsn;
|
||||
pdp = sgsn_create_pdp_ctx(ggsn, mmctx, req_nsapi, tp);
|
||||
if (!pdp)
|
||||
return -1;
|
||||
|
||||
/* Store SAPI and Transaction Identifier */
|
||||
pdp->sapi = req_llc_sapi;
|
||||
pdp->ti = transaction_id;
|
||||
pdp->destroy_ggsn = destroy_ggsn;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ggsn_lookup_cb(void *arg, int status, int timeouts, struct hostent *hostent)
|
||||
{
|
||||
struct sgsn_ggsn_ctx *ggsn;
|
||||
struct sgsn_ggsn_lookup *lookup = arg;
|
||||
struct in_addr *addr = NULL;
|
||||
char buf[INET_ADDRSTRLEN];
|
||||
|
||||
/* The context is gone while we made a request */
|
||||
if (!lookup->mmctx) {
|
||||
talloc_free(lookup->orig_msg);
|
||||
talloc_free(lookup);
|
||||
return;
|
||||
}
|
||||
|
||||
if (status != ARES_SUCCESS) {
|
||||
struct sgsn_mm_ctx *mmctx = lookup->mmctx;
|
||||
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "DNS query failed.\n");
|
||||
|
||||
/* Need to try with three digits now */
|
||||
if (lookup->state == SGSN_GGSN_2DIGIT) {
|
||||
char *hostname;
|
||||
int rc;
|
||||
|
||||
lookup->state = SGSN_GGSN_3DIGIT;
|
||||
hostname = osmo_apn_qualify_from_imsi(mmctx->imsi,
|
||||
lookup->apn_str, 1);
|
||||
LOGMMCTXP(LOGL_DEBUG, mmctx,
|
||||
"Going to query %s\n", hostname);
|
||||
rc = sgsn_ares_query(sgsn, hostname,
|
||||
ggsn_lookup_cb, lookup);
|
||||
if (rc != 0) {
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't start GGSN\n");
|
||||
goto reject_due_failure;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't resolve GGSN\n");
|
||||
goto reject_due_failure;
|
||||
}
|
||||
|
||||
if (hostent->h_length != sizeof(struct in_addr)) {
|
||||
LOGMMCTXP(LOGL_ERROR, lookup->mmctx,
|
||||
"Wrong addr size(%zu)\n", sizeof(struct in_addr));
|
||||
goto reject_due_failure;
|
||||
}
|
||||
|
||||
/* Get the first addr from the list */
|
||||
addr = (struct in_addr *) hostent->h_addr_list[0];
|
||||
if (!addr) {
|
||||
LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "No host address.\n");
|
||||
goto reject_due_failure;
|
||||
}
|
||||
|
||||
ggsn = sgsn_ggsn_ctx_alloc(UINT32_MAX);
|
||||
if (!ggsn) {
|
||||
LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "Failed to create ggsn.\n");
|
||||
goto reject_due_failure;
|
||||
}
|
||||
ggsn->remote_addr = *addr;
|
||||
LOGMMCTXP(LOGL_NOTICE, lookup->mmctx,
|
||||
"Selected %s as GGSN.\n",
|
||||
inet_ntop(AF_INET, addr, buf, sizeof(buf)));
|
||||
|
||||
/* forget about the ggsn look-up */
|
||||
lookup->mmctx->ggsn_lookup = NULL;
|
||||
|
||||
activate_ggsn(lookup->mmctx, ggsn, lookup->ti, lookup->nsapi,
|
||||
lookup->sapi, &lookup->tp, 1);
|
||||
|
||||
/* Now free it */
|
||||
talloc_free(lookup->orig_msg);
|
||||
talloc_free(lookup);
|
||||
return;
|
||||
|
||||
reject_due_failure:
|
||||
gsm48_tx_gsm_act_pdp_rej(lookup->mmctx, lookup->ti,
|
||||
GMM_CAUSE_NET_FAIL, 0, NULL);
|
||||
lookup->mmctx->ggsn_lookup = NULL;
|
||||
talloc_free(lookup->orig_msg);
|
||||
talloc_free(lookup);
|
||||
}
|
||||
|
||||
static int do_act_pdp_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, bool *delete)
|
||||
{
|
||||
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
|
||||
struct gsm48_act_pdp_ctx_req *act_req = (struct gsm48_act_pdp_ctx_req *) gh->data;
|
||||
uint8_t req_qos_len, req_pdpa_len;
|
||||
uint8_t *req_qos, *req_pdpa;
|
||||
struct tlv_parsed tp;
|
||||
uint8_t transaction_id = gsm48_hdr_trans_id(gh);
|
||||
struct sgsn_ggsn_ctx *ggsn;
|
||||
struct sgsn_pdp_ctx *pdp;
|
||||
enum gsm48_gsm_cause gsm_cause;
|
||||
char apn_str[GSM_APN_LENGTH] = { 0, };
|
||||
char *hostname;
|
||||
int rc;
|
||||
struct gprs_llc_lle *lle;
|
||||
char buf[INET_ADDRSTRLEN];
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, mmctx, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ",
|
||||
act_req->req_llc_sapi, act_req->req_nsapi);
|
||||
|
||||
/* FIXME: length checks! */
|
||||
req_qos_len = act_req->data[0];
|
||||
req_qos = act_req->data + 1; /* 10.5.6.5 */
|
||||
req_pdpa_len = act_req->data[1 + req_qos_len];
|
||||
req_pdpa = act_req->data + 1 + req_qos_len + 1; /* 10.5.6.4 */
|
||||
|
||||
switch (req_pdpa[0] & 0xf) {
|
||||
case 0x0:
|
||||
DEBUGPC(DMM, "ETSI ");
|
||||
break;
|
||||
case 0x1:
|
||||
DEBUGPC(DMM, "IETF ");
|
||||
break;
|
||||
case 0xf:
|
||||
DEBUGPC(DMM, "Empty ");
|
||||
break;
|
||||
}
|
||||
|
||||
switch (req_pdpa[1]) {
|
||||
case 0x21:
|
||||
DEBUGPC(DMM, "IPv4 ");
|
||||
if (req_pdpa_len >= 6) {
|
||||
struct in_addr ia;
|
||||
ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2)));
|
||||
DEBUGPC(DMM, "%s ", inet_ntop(AF_INET, &ia, buf, sizeof(buf)));
|
||||
}
|
||||
break;
|
||||
case 0x57:
|
||||
DEBUGPC(DMM, "IPv6 ");
|
||||
if (req_pdpa_len >= 18) {
|
||||
/* FIXME: print IPv6 address */
|
||||
}
|
||||
break;
|
||||
default:
|
||||
DEBUGPC(DMM, "0x%02x ", req_pdpa[1]);
|
||||
break;
|
||||
}
|
||||
|
||||
LOGPC(DMM, LOGL_INFO, "\n");
|
||||
|
||||
/* Check if NSAPI is out of range (TS 04.65 / 7.2) */
|
||||
if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) {
|
||||
/* Send reject with GSM_CAUSE_INV_MAND_INFO */
|
||||
return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id,
|
||||
GSM_CAUSE_INV_MAND_INFO,
|
||||
0, NULL);
|
||||
}
|
||||
|
||||
/* Optional: Access Point Name, Protocol Config Options */
|
||||
if (req_pdpa + req_pdpa_len < msg->data + msg->len)
|
||||
tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len,
|
||||
(msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0);
|
||||
else
|
||||
memset(&tp, 0, sizeof(tp));
|
||||
|
||||
|
||||
/* put the non-TLV elements in the TLV parser structure to
|
||||
* pass them on to the SGSN / GTP code */
|
||||
tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len;
|
||||
tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos;
|
||||
tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len;
|
||||
tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa;
|
||||
|
||||
/* Check if NSAPI is already in use */
|
||||
pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi);
|
||||
if (pdp) {
|
||||
/* We already have a PDP context for this TLLI + NSAPI tuple */
|
||||
if (pdp->sapi == act_req->req_llc_sapi &&
|
||||
pdp->ti == transaction_id) {
|
||||
/* This apparently is a re-transmission of a PDP CTX
|
||||
* ACT REQ (our ACT ACK must have got dropped) */
|
||||
rc = gsm48_tx_gsm_act_pdp_acc(pdp);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
|
||||
if (pdp->mm->ran_type == MM_CTX_T_GERAN_Gb) {
|
||||
/* Also re-transmit the SNDCP XID message */
|
||||
lle = &pdp->mm->gb.llme->lle[pdp->sapi];
|
||||
rc = sndcp_sn_xid_req(lle,pdp->nsapi);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Send reject with GSM_CAUSE_NSAPI_IN_USE */
|
||||
return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id,
|
||||
GSM_CAUSE_NSAPI_IN_USE,
|
||||
0, NULL);
|
||||
}
|
||||
|
||||
if (mmctx->ggsn_lookup) {
|
||||
if (mmctx->ggsn_lookup->sapi == act_req->req_llc_sapi &&
|
||||
mmctx->ggsn_lookup->ti == transaction_id) {
|
||||
LOGMMCTXP(LOGL_NOTICE, mmctx,
|
||||
"Re-transmission while doing look-up. Ignoring.\n");
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/* Only increment counter for a real activation, after we checked
|
||||
* for re-transmissions */
|
||||
rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]);
|
||||
|
||||
/* Determine GGSN based on APN and subscription options */
|
||||
ggsn = sgsn_mm_ctx_find_ggsn_ctx(mmctx, &tp, &gsm_cause, apn_str);
|
||||
if (ggsn)
|
||||
return activate_ggsn(mmctx, ggsn, transaction_id,
|
||||
act_req->req_nsapi, act_req->req_llc_sapi,
|
||||
&tp, 0);
|
||||
|
||||
if (strlen(apn_str) == 0)
|
||||
goto no_context;
|
||||
if (!sgsn->cfg.dynamic_lookup)
|
||||
goto no_context;
|
||||
|
||||
/* schedule a dynamic look-up */
|
||||
mmctx->ggsn_lookup = talloc_zero(tall_sgsn_ctx, struct sgsn_ggsn_lookup);
|
||||
if (!mmctx->ggsn_lookup)
|
||||
goto no_context;
|
||||
|
||||
mmctx->ggsn_lookup->state = SGSN_GGSN_2DIGIT;
|
||||
mmctx->ggsn_lookup->mmctx = mmctx;
|
||||
strcpy(mmctx->ggsn_lookup->apn_str, apn_str);
|
||||
|
||||
mmctx->ggsn_lookup->orig_msg = msg;
|
||||
mmctx->ggsn_lookup->tp = tp;
|
||||
|
||||
mmctx->ggsn_lookup->ti = transaction_id;
|
||||
mmctx->ggsn_lookup->nsapi = act_req->req_nsapi;
|
||||
mmctx->ggsn_lookup->sapi = act_req->req_llc_sapi;
|
||||
|
||||
hostname = osmo_apn_qualify_from_imsi(mmctx->imsi,
|
||||
mmctx->ggsn_lookup->apn_str, 0);
|
||||
|
||||
LOGMMCTXP(LOGL_DEBUG, mmctx, "Going to query %s\n", hostname);
|
||||
rc = sgsn_ares_query(sgsn, hostname,
|
||||
ggsn_lookup_cb, mmctx->ggsn_lookup);
|
||||
if (rc != 0) {
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "Failed to start ares query.\n");
|
||||
goto no_context;
|
||||
}
|
||||
*delete = 0;
|
||||
|
||||
return 0;
|
||||
|
||||
no_context:
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "No GGSN context found!\n");
|
||||
return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id,
|
||||
gsm_cause, 0, NULL);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.1: Activate PDP Context Request */
|
||||
static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx,
|
||||
struct msgb *_msg)
|
||||
{
|
||||
bool delete = 1;
|
||||
struct msgb *msg;
|
||||
int rc;
|
||||
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REQUEST]);
|
||||
|
||||
/*
|
||||
* This is painful. We might not have a static GGSN
|
||||
* configuration and then would need to copy the msg
|
||||
* and re-do most of this routine (or call it again
|
||||
* and make sure it only goes through the dynamic
|
||||
* resolving. The question is what to optimize for
|
||||
* and the dynamic resolution will be the right thing
|
||||
* in the long run.
|
||||
*/
|
||||
msg = bssgp_msgb_copy(_msg, __func__);
|
||||
if (!msg) {
|
||||
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(_msg);
|
||||
uint8_t transaction_id = gsm48_hdr_trans_id(gh);
|
||||
|
||||
LOGMMCTXP(LOGL_ERROR, mmctx, "-> ACTIVATE PDP CONTEXT REQ failed copy.\n");
|
||||
/* Send reject with GSM_CAUSE_INV_MAND_INFO */
|
||||
return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id,
|
||||
GSM_CAUSE_NET_FAIL,
|
||||
0, NULL);
|
||||
}
|
||||
|
||||
rc = do_act_pdp_req(mmctx, msg, &delete);
|
||||
if (delete)
|
||||
msgb_free(msg);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.8: Deactivate PDP Context Request */
|
||||
static int gsm48_rx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, struct msgb *msg)
|
||||
{
|
||||
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
|
||||
uint8_t transaction_id = gsm48_hdr_trans_id(gh);
|
||||
struct sgsn_pdp_ctx *pdp;
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n",
|
||||
get_value_string(gsm48_gsm_cause_names, gh->data[0]));
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_REQUEST]);
|
||||
|
||||
pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id);
|
||||
if (!pdp) {
|
||||
LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Request for "
|
||||
"non-existing PDP Context (IMSI=%s, TI=%u)\n",
|
||||
mm->imsi, transaction_id);
|
||||
return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id);
|
||||
}
|
||||
|
||||
return sgsn_delete_pdp_ctx(pdp);
|
||||
}
|
||||
|
||||
/* 3GPP TS 24.008 § 9.5.9: Deactivate PDP Context Accept */
|
||||
static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg)
|
||||
{
|
||||
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
|
||||
uint8_t transaction_id = gsm48_hdr_trans_id(gh);
|
||||
struct sgsn_pdp_ctx *pdp;
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT ACK\n");
|
||||
rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_ACCEPT]);
|
||||
|
||||
pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id);
|
||||
if (!pdp) {
|
||||
LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Accept for "
|
||||
"non-existing PDP Context (IMSI=%s, TI=%u)\n",
|
||||
mm->imsi, transaction_id);
|
||||
return 0;
|
||||
}
|
||||
/* stop timer 3395 */
|
||||
pdpctx_timer_stop(pdp, 3395);
|
||||
if (pdp->ggsn)
|
||||
return sgsn_delete_pdp_ctx(pdp);
|
||||
/* GTP side already detached, freeing */
|
||||
sgsn_pdp_ctx_free(pdp);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gsm48_rx_gsm_status(struct sgsn_mm_ctx *ctx, struct msgb *msg)
|
||||
{
|
||||
struct gsm48_hdr *gh = msgb_l3(msg);
|
||||
|
||||
LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS SM STATUS (cause: %s)\n",
|
||||
get_value_string(gsm48_gsm_cause_names, gh->data[0]));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void pdpctx_timer_cb(void *_pdp)
|
||||
{
|
||||
struct sgsn_pdp_ctx *pdp = _pdp;
|
||||
|
||||
pdp->num_T_exp++;
|
||||
|
||||
switch (pdp->T) {
|
||||
case 3395: /* waiting for PDP CTX DEACT ACK */
|
||||
if (pdp->num_T_exp > T339X_MAX_RETRANS) {
|
||||
LOGPDPCTXP(LOGL_NOTICE, pdp, "T3395 expired > %d times\n", T339X_MAX_RETRANS);
|
||||
pdp->state = PDP_STATE_INACTIVE;
|
||||
if (pdp->ggsn)
|
||||
sgsn_delete_pdp_ctx(pdp);
|
||||
else
|
||||
sgsn_pdp_ctx_free(pdp);
|
||||
break;
|
||||
}
|
||||
_gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, GSM_CAUSE_NET_FAIL, true);
|
||||
pdpctx_timer_rearm(pdp, 3395);
|
||||
break;
|
||||
default:
|
||||
LOGPDPCTXP(LOGL_ERROR, pdp, "timer expired in unknown mode %u\n",
|
||||
pdp->T);
|
||||
}
|
||||
}
|
||||
|
||||
/* GPRS Session Management */
|
||||
int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
|
||||
struct gprs_llc_llme *llme)
|
||||
{
|
||||
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg);
|
||||
int rc;
|
||||
|
||||
/* MMCTX can be NULL when called */
|
||||
|
||||
if (!mmctx) {
|
||||
LOGGBIUP(llme, msg, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n");
|
||||
/* 6.1.3.6 */
|
||||
if (gh->msg_type == GSM48_MT_GSM_STATUS)
|
||||
return 0;
|
||||
|
||||
return gsm0408_gprs_force_reattach_oldmsg(msg, llme);
|
||||
}
|
||||
|
||||
switch (gh->msg_type) {
|
||||
case GSM48_MT_GSM_ACT_PDP_REQ:
|
||||
rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg);
|
||||
break;
|
||||
case GSM48_MT_GSM_DEACT_PDP_REQ:
|
||||
rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg);
|
||||
break;
|
||||
case GSM48_MT_GSM_DEACT_PDP_ACK:
|
||||
rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg);
|
||||
break;
|
||||
case GSM48_MT_GSM_STATUS:
|
||||
rc = gsm48_rx_gsm_status(mmctx, msg);
|
||||
break;
|
||||
case GSM48_MT_GSM_REQ_PDP_ACT_REJ:
|
||||
case GSM48_MT_GSM_ACT_AA_PDP_REQ:
|
||||
case GSM48_MT_GSM_DEACT_AA_PDP_REQ:
|
||||
LOGMMCTXP(LOGL_NOTICE, mmctx, "Unimplemented GSM 04.08 GSM msg type 0x%02x: %s\n",
|
||||
gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg)));
|
||||
rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL);
|
||||
break;
|
||||
default:
|
||||
LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GSM msg type 0x%02x: %s\n",
|
||||
gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg)));
|
||||
rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL);
|
||||
break;
|
||||
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
|
@ -48,6 +48,7 @@
|
|||
#include <osmocom/sgsn/gprs_llc.h>
|
||||
#include <osmocom/sgsn/gprs_sgsn.h>
|
||||
#include <osmocom/sgsn/gprs_gmm.h>
|
||||
#include <osmocom/sgsn/gprs_sm.h>
|
||||
#include <osmocom/sgsn/gprs_subscriber.h>
|
||||
#include <osmocom/sgsn/gprs_sndcp.h>
|
||||
#include <osmocom/sgsn/gprs_ranap.h>
|
||||
|
|
|
@ -59,6 +59,7 @@ sgsn_test_LDADD = \
|
|||
$(top_builddir)/src/sgsn/gprs_llc_xid.o \
|
||||
$(top_builddir)/src/sgsn/gprs_sndcp_xid.o \
|
||||
$(top_builddir)/src/sgsn/slhc.o \
|
||||
$(top_builddir)/src/sgsn/gprs_sm.o \
|
||||
$(top_builddir)/src/sgsn/gprs_sndcp_comp.o \
|
||||
$(top_builddir)/src/sgsn/gprs_sndcp_pcomp.o \
|
||||
$(top_builddir)/src/sgsn/v42bis.o \
|
||||
|
|
Loading…
Reference in New Issue