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authorPau Espin Pedrol <pespin@sysmocom.de>2019-09-02 18:27:27 +0200
committerPau Espin Pedrol <pespin@sysmocom.de>2019-09-03 15:22:15 +0200
commit35f0e664bf2a1c98ebd065f4d4483e542c4c7861 (patch)
tree74e71f53a96195da518ef93ccd0cf694ad45aa96
parent31c4657c971e40407163034526aafeb9b5a83460 (diff)
Split out GPRS SM layer into its own file
-rw-r--r--include/osmocom/sgsn/Makefile.am1
-rw-r--r--include/osmocom/sgsn/gprs_gmm.h12
-rw-r--r--include/osmocom/sgsn/gprs_sm.h15
-rw-r--r--src/sgsn/Makefile.am1
-rw-r--r--src/sgsn/gprs_gb.c1
-rw-r--r--src/sgsn/gprs_gmm.c706
-rw-r--r--src/sgsn/gprs_ranap.c1
-rw-r--r--src/sgsn/gprs_sgsn.c1
-rw-r--r--src/sgsn/gprs_sm.c749
-rw-r--r--src/sgsn/sgsn_libgtp.c1
-rw-r--r--tests/sgsn/Makefile.am1
11 files changed, 780 insertions, 709 deletions
diff --git a/include/osmocom/sgsn/Makefile.am b/include/osmocom/sgsn/Makefile.am
index 9ddc2bc9..3fdb6b34 100644
--- a/include/osmocom/sgsn/Makefile.am
+++ b/include/osmocom/sgsn/Makefile.am
@@ -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 \
diff --git a/include/osmocom/sgsn/gprs_gmm.h b/include/osmocom/sgsn/gprs_gmm.h
index 982cd93d..e2b17d21 100644
--- a/include/osmocom/sgsn/gprs_gmm.h
+++ b/include/osmocom/sgsn/gprs_gmm.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 */
diff --git a/include/osmocom/sgsn/gprs_sm.h b/include/osmocom/sgsn/gprs_sm.h
new file mode 100644
index 00000000..55c95b89
--- /dev/null
+++ b/include/osmocom/sgsn/gprs_sm.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);
diff --git a/src/sgsn/Makefile.am b/src/sgsn/Makefile.am
index 4402c9c6..8bc1abb8 100644
--- a/src/sgsn/Makefile.am
+++ b/src/sgsn/Makefile.am
@@ -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 \
diff --git a/src/sgsn/gprs_gb.c b/src/sgsn/gprs_gb.c
index 65342cf2..2d9c25a1 100644
--- a/src/sgsn/gprs_gb.c
+++ b/src/sgsn/gprs_gb.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 */
diff --git a/src/sgsn/gprs_gmm.c b/src/sgsn/gprs_gmm.c
index 3317a092..afae369a 100644
--- a/src/sgsn/gprs_gmm.c
+++ b/src/sgsn/gprs_gmm.c
@@ -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)
{
diff --git a/src/sgsn/gprs_ranap.c b/src/sgsn/gprs_ranap.c
index 027b6665..27b96415 100644
--- a/src/sgsn/gprs_ranap.c
+++ b/src/sgsn/gprs_ranap.c
@@ -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>
diff --git a/src/sgsn/gprs_sgsn.c b/src/sgsn/gprs_sgsn.c
index 1c23d06a..189f7bb0 100644
--- a/src/sgsn/gprs_sgsn.c
+++ b/src/sgsn/gprs_sgsn.c
@@ -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>
diff --git a/src/sgsn/gprs_sm.c b/src/sgsn/gprs_sm.c
new file mode 100644
index 00000000..8cf5c5d8
--- /dev/null
+++ b/src/sgsn/gprs_sm.c
@@ -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;
+}
diff --git a/src/sgsn/sgsn_libgtp.c b/src/sgsn/sgsn_libgtp.c
index f6d7a690..c5bc5b81 100644
--- a/src/sgsn/sgsn_libgtp.c
+++ b/src/sgsn/sgsn_libgtp.c
@@ -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>
diff --git a/tests/sgsn/Makefile.am b/tests/sgsn/Makefile.am
index 9afe0f70..bdcd9b47 100644
--- a/tests/sgsn/Makefile.am
+++ b/tests/sgsn/Makefile.am
@@ -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 \