Vadim Yanitskiy has uploaded this change for review. (
https://gerrit.osmocom.org/11920
Change subject: libmsc/gsm_04_11.c: accept MT SMS messages over GSUP
......................................................................
libmsc/gsm_04_11.c: accept MT SMS messages over GSUP
Change-Id: I57357982ca0e51f6722c24a4aa1d0fb3e6caef88
Depends-on: (core) Ic37f3b2114b8095cfce22977e67133b9103942e3
Related: OS#3587
---
M include/osmocom/msc/gsm_04_11.h
M include/osmocom/msc/gsm_04_11_gsup.h
M src/libmsc/gsm_04_08.c
M src/libmsc/gsm_04_11.c
M src/libmsc/gsm_04_11_gsup.c
5 files changed, 177 insertions(+), 3 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/20/11920/1
diff --git a/include/osmocom/msc/gsm_04_11.h b/include/osmocom/msc/gsm_04_11.h
index 3997ab2..4310115 100644
--- a/include/osmocom/msc/gsm_04_11.h
+++ b/include/osmocom/msc/gsm_04_11.h
@@ -42,6 +42,10 @@
int gsm411_send_sms(struct gsm_network *net,
struct vlr_subscr *vsub,
struct gsm_sms *sms);
+int gsm411_send_rp_data(struct gsm_network *net, struct vlr_subscr *vsub,
+ size_t sm_rp_oa_len, const uint8_t *sm_rp_oa,
+ size_t sm_rp_ud_len, const uint8_t *sm_rp_ud);
+
void gsm411_sapi_n_reject(struct gsm_subscriber_connection *conn);
int gsm411_send_rp_ack(struct gsm_trans *trans, uint8_t msg_ref);
diff --git a/include/osmocom/msc/gsm_04_11_gsup.h
b/include/osmocom/msc/gsm_04_11_gsup.h
index 82f575d..9c6f2fb 100644
--- a/include/osmocom/msc/gsm_04_11_gsup.h
+++ b/include/osmocom/msc/gsm_04_11_gsup.h
@@ -13,3 +13,9 @@
uint8_t sm_rp_mr, uint8_t *sm_rp_da, uint8_t sm_rp_da_len);
int gsm411_gsup_mo_handler(struct vlr_subscr *vsub,
struct osmo_gsup_message *gsup_msg);
+
+int gsm411_gsup_mt_fwd_sm_res(struct gsm_trans *trans, uint8_t sm_rp_mr);
+int gsm411_gsup_mt_fwd_sm_err(struct gsm_trans *trans,
+ uint8_t sm_rp_mr, uint8_t cause);
+int gsm411_gsup_mt_handler(struct vlr_subscr *vsub,
+ struct osmo_gsup_message *gsup_msg);
diff --git a/src/libmsc/gsm_04_08.c b/src/libmsc/gsm_04_08.c
index 161585c..87e4cb1 100644
--- a/src/libmsc/gsm_04_08.c
+++ b/src/libmsc/gsm_04_08.c
@@ -1792,6 +1792,11 @@
DEBUGP(DMSC, "Routed to GSM 04.11 MO handler\n");
return gsm411_gsup_mo_handler(vsub, gsup_msg);
+ /* GSM 04.11 code implementing MT SMS */
+ case OSMO_GSUP_MSGT_MT_FORWARD_SM_REQUEST:
+ DEBUGP(DMSC, "Routed to GSM 04.11 MT handler\n");
+ return gsm411_gsup_mt_handler(vsub, gsup_msg);
+
default:
LOGP(DMM, LOGL_ERROR, "No handler found for %s, dropping
message...\n",
osmo_gsup_message_type_name(gsup_msg->message_type));
diff --git a/src/libmsc/gsm_04_11.c b/src/libmsc/gsm_04_11.c
index 93c2ea7..efaf2ae 100644
--- a/src/libmsc/gsm_04_11.c
+++ b/src/libmsc/gsm_04_11.c
@@ -159,9 +159,11 @@
GSM411_MMSMS_REL_IND, NULL, 0);
/* Notify the SMSqueue and free stored SMS */
- send_signal(S_SMS_UNKNOWN_ERROR, NULL, sms, event);
- trans->sms.sms = NULL;
- sms_free(sms);
+ if (sms != NULL) { /* gsm411_send_rp_data() doesn't set
trans->sms.sms */
+ send_signal(S_SMS_UNKNOWN_ERROR, NULL, sms, event);
+ trans->sms.sms = NULL;
+ sms_free(sms);
+ }
/* Destroy this transaction */
trans_free(trans);
@@ -798,6 +800,9 @@
* successfully received a SMS. We can now safely mark it as
* transmitted */
+ if (trans->net->enable_sms_over_gsup)
+ goto sms_over_gsup;
+
if (!sms) {
LOGP(DLSMS, LOGL_ERROR, "RX RP-ACK but no sms in
transaction?!?\n");
return gsm411_send_rp_error(trans, rph->msg_ref,
@@ -816,6 +821,10 @@
trans->sms.sms = NULL;
return 0;
+
+sms_over_gsup:
+ /* Forward towards ESME via GSUP */
+ return gsm411_gsup_mt_fwd_sm_res(trans, rph->msg_ref);
}
static int gsm411_rx_rp_error(struct gsm_trans *trans,
@@ -834,6 +843,9 @@
vlr_subscr_name(trans->conn->vsub), cause_len, cause,
get_value_string(gsm411_rp_cause_strs, cause));
+ if (trans->net->enable_sms_over_gsup)
+ goto sms_over_gsup;
+
if (!sms) {
LOGP(DLSMS, LOGL_ERROR,
"RX RP-ERR, but no sms in transaction?!?\n");
@@ -859,6 +871,10 @@
trans->sms.sms = NULL;
return 0;
+
+sms_over_gsup:
+ /* Forward towards ESME via GSUP */
+ return gsm411_gsup_mt_fwd_sm_err(trans, rph->msg_ref, cause);
}
static int gsm411_rx_rp_smma(struct msgb *msg, struct gsm_trans *trans,
@@ -1115,6 +1131,54 @@
GSM411_SM_RL_DATA_REQ);
}
+/* Low-level function to send raw RP-DATA to a given subscriber */
+int gsm411_send_rp_data(struct gsm_network *net, struct vlr_subscr *vsub,
+ size_t sm_rp_oa_len, const uint8_t *sm_rp_oa,
+ size_t sm_rp_ud_len, const uint8_t *sm_rp_ud)
+{
+ struct gsm_trans *trans;
+ struct msgb *msg;
+ uint8_t *ptr;
+
+ /* Allocate a new transaction for MT SMS */
+ trans = gsm411_alloc_mt_trans(net, vsub);
+ if (!trans)
+ return -ENOMEM;
+
+ /* Allocate a message buffer for to be encoded SMS */
+ msg = gsm411_msgb_alloc();
+ if (!msg) {
+ trans_free(trans);
+ return -ENOMEM;
+ }
+
+ /* Encode RP-DA length */
+ ptr = (uint8_t *) msgb_put(msg, 1);
+ ptr[0] = sm_rp_oa_len;
+
+ /* Encode RP-OA (SMSC address) */
+ ptr = (uint8_t *) msgb_put(msg, sm_rp_oa_len);
+ memcpy(ptr, sm_rp_oa, sm_rp_oa_len);
+
+ /* Encode RP-DA (shall be empty, len=0) */
+ ptr = (uint8_t *) msgb_put(msg, 1);
+ ptr[0] = 0x00;
+
+ /* Encode RP-UD length */
+ ptr = (uint8_t *) msgb_put(msg, 1);
+ ptr[0] = sm_rp_ud_len;
+
+ /* Encode RP-UD itself (SM TPDU) */
+ ptr = (uint8_t *) msgb_put(msg, sm_rp_ud_len);
+ memcpy(ptr, sm_rp_ud, sm_rp_ud_len);
+
+ rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_DELIVERED]);
+
+ return gsm411_rp_sendmsg(&trans->sms.smr_inst, msg,
+ GSM411_MT_RP_DATA_MT, trans->sms.sm_rp_mr,
+ GSM411_SM_RL_DATA_REQ);
+}
+
/* Entry point for incoming GSM48_PDISC_SMS from abis_rsl.c */
int gsm0411_rcv_sms(struct gsm_subscriber_connection *conn,
struct msgb *msg)
diff --git a/src/libmsc/gsm_04_11_gsup.c b/src/libmsc/gsm_04_11_gsup.c
index ee06936..d94c384 100644
--- a/src/libmsc/gsm_04_11_gsup.c
+++ b/src/libmsc/gsm_04_11_gsup.c
@@ -239,3 +239,98 @@
msg_name, msg_is_err ? "Err" : "Res");
return -EINVAL;
}
+
+int gsm411_gsup_mt_fwd_sm_res(struct gsm_trans *trans, uint8_t sm_rp_mr)
+{
+ struct osmo_gsup_message gsup_msg;
+
+ /* Associate logging messages with this subscriber */
+ log_set_context(LOG_CTX_VLR_SUBSCR, trans->vsub);
+
+ LOGP(DLSMS, LOGL_DEBUG, "TX MT-forwardSM-Res\n");
+
+ /* Initialize a new GSUP message */
+ gsup_msg_init(&gsup_msg, OSMO_GSUP_MSGT_MT_FORWARD_SM_RESULT,
+ trans->vsub->imsi, &sm_rp_mr);
+
+ return gsup_msg_send(trans->net, &gsup_msg);
+}
+
+int gsm411_gsup_mt_fwd_sm_err(struct gsm_trans *trans,
+ uint8_t sm_rp_mr, uint8_t cause)
+{
+ struct osmo_gsup_message gsup_msg;
+
+ /* Associate logging messages with this subscriber */
+ log_set_context(LOG_CTX_VLR_SUBSCR, trans->vsub);
+
+ LOGP(DLSMS, LOGL_DEBUG, "TX MT-forwardSM-Err\n");
+
+ /* Initialize a new GSUP message */
+ gsup_msg_init(&gsup_msg, OSMO_GSUP_MSGT_MT_FORWARD_SM_ERROR,
+ trans->vsub->imsi, &sm_rp_mr);
+
+ /* SM-RP-Cause value */
+ gsup_msg.sm_rp_cause = &cause;
+
+ /* TODO: include optional SM-RP-UI field if present */
+ return gsup_msg_send(trans->net, &gsup_msg);
+}
+
+/* Handles MT SMS (and triggers Paging Request if required) */
+int gsm411_gsup_mt_handler(struct vlr_subscr *vsub,
+ struct osmo_gsup_message *gsup_msg)
+{
+ struct vlr_instance *vlr;
+ struct gsm_network *net;
+ int rc;
+
+ /* Obtain required pointers */
+ vlr = vsub->vlr;
+ net = (struct gsm_network *) vlr->user_ctx;
+
+ /* Associate logging messages with this subscriber */
+ log_set_context(LOG_CTX_VLR_SUBSCR, vsub);
+
+ LOGP(DLSMS, LOGL_DEBUG, "RX MT-forwardSM-Req\n");
+
+ /* Make sure that 'SMS over GSUP' is expected */
+ if (!net->enable_sms_over_gsup) {
+ LOGP(DLSMS, LOGL_NOTICE, "Unexpected MT SMS over GSUP, "
+ "ignoring message...\n");
+ /* TODO: notify sender about that? */
+ return -EIO;
+ }
+
+ /* Verify GSUP message */
+ if (!gsup_msg->sm_rp_mr)
+ goto msg_error;
+ if (!gsup_msg->sm_rp_da_type)
+ goto msg_error;
+ if (!gsup_msg->sm_rp_oa_type)
+ goto msg_error;
+ if (!gsup_msg->sm_rp_ui)
+ goto msg_error;
+
+ /**
+ * FIXME: SM-RP-MR is not known yet
+ * TODO: SM-RP-DA is out of our interest
+ * TODO: SM-RP-OA should contain the SMSC address
+ */
+ rc = gsm411_send_rp_data(net, vsub,
+ gsup_msg->sm_rp_oa_len, gsup_msg->sm_rp_oa,
+ gsup_msg->sm_rp_ui_len, gsup_msg->sm_rp_ui);
+ if (rc) {
+ LOGP(DLSMS, LOGL_NOTICE, "Failed to send MT SMS, "
+ "ignoring MT-forwardSM-Req message...\n");
+ /* TODO: notify sender about that? */
+ return rc;
+ }
+
+ return 0;
+
+msg_error:
+ /* TODO: notify sender about that? */
+ LOGP(DLSMS, LOGL_NOTICE, "RX malformed MT-forwardSM-Req\n");
+ return -EINVAL;
+}
--
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Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I57357982ca0e51f6722c24a4aa1d0fb3e6caef88
Gerrit-Change-Number: 11920
Gerrit-PatchSet: 1
Gerrit-Owner: Vadim Yanitskiy <[email protected]>
