Change in osmo-ttcn3-hacks[master]: library/GSUP: implement SRI_FOR_SM message support

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Vadim Yanitskiy gerrit-no-reply at lists.osmocom.org
Fri Sep 21 19:28:47 UTC 2018 

Vadim Yanitskiy has uploaded this change for review. ( https://gerrit.osmocom.org/11061


Change subject: library/GSUP: implement SRI_FOR_SM message support
......................................................................

library/GSUP: implement SRI_FOR_SM message support

According to 3GPP TS 29.002, section 12.1 the SRI_FOR_SM message
(a.k.a MAP-SEND-ROUTING-INFO-FOR-SM) is used to retrieve the
routing information needed for routing a short message to
the servicing node of subscriber.

Please note that only the 'must-have' fields of SRI_FOR_SM
are introduced by this change, in particular:

  - GSUP_MSGT_SRI_FOR_SM_REQUEST (MAP Request)
    - GSUP_MSISDN_IE
    - GSUP_SM_RP_RPI_IE
    - GSUP_SMSC_ADDR_IE

  - GSUP_MSGT_SRI_FOR_SM_RESULT (MAP Response)
    - GSUP_IMSI_IE
    - GSUP_NODE_ADDR_IE

  - GSUP_MSGT_SRI_FOR_SM_ERROR (MAP Response)
    - GSUP_CAUSE_IE (MAP User Error, see 7.6.1)

Since there is no TCAP layer in GSUP, the context is emulated
using the session management IEs, in particular using the
GSUP_SESSION_ID_IE. The session state IE isn't used due to
the 'REQ-RSP' nature of this message.

Change-Id: I7c1a882748d82ed5ef0b22cf1ae5764da5e874a0
---
M library/GSUP_Types.ttcn
1 file changed, 141 insertions(+), 2 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/61/11061/1

diff --git a/library/GSUP_Types.ttcn b/library/GSUP_Types.ttcn
index 7680815..80b8e2e 100644
--- a/library/GSUP_Types.ttcn
+++ b/library/GSUP_Types.ttcn
@@ -31,6 +31,11 @@
 	OSMO_GSUP_PDP_QOS_IE		('13'O),
 	OSMO_GSUP_CHARG_CHAR_IE		('14'O),
 
+	/* FIXME: should we reserve a separate range (e.g. 0x40) for SM? */
+	OSMO_GSUP_SMSC_ADDR		('15'O),
+	OSMO_GSUP_NODE_ADDR		('16'O),
+	OSMO_GSUP_SM_RP_RPI		('17'O),
+
 	OSMO_GSUP_RAND_IE		('20'O),
 	OSMO_GSUP_SRES_IE		('21'O),
 	OSMO_GSUP_KC_IE			('22'O),
@@ -75,7 +80,12 @@
 
 	OSMO_GSUP_MSGT_PROC_SS_REQUEST		('00100000'B),
 	OSMO_GSUP_MSGT_PROC_SS_ERROR		('00100001'B),
-	OSMO_GSUP_MSGT_PROC_SS_RESULT		('00100010'B)
+	OSMO_GSUP_MSGT_PROC_SS_RESULT		('00100010'B),
+
+	/* FIXME: 0b001001? any ideas? */
+	OSMO_GSUP_MSGT_SRI_FOR_SM_REQUEST	('00100100'B),
+	OSMO_GSUP_MSGT_SRI_FOR_SM_ERROR		('00100101'B),
+	OSMO_GSUP_MSGT_SRI_FOR_SM_RESULT	('00100110'B)
 } with { variant "FIELDLENGTH(8)" };
 
 type enumerated GSUP_CancelType {
@@ -128,6 +138,9 @@
 				 session_state, tag = OSMO_GSUP_SESSION_STATE_IE;
 				 session_id, tag = OSMO_GSUP_SESSION_ID_IE;
 				 ss_info, tag = OSMO_GSUP_SS_INFO_IE;
+				 smsc_addr, tag = OSMO_GSUP_SMSC_ADDR;
+				 node_addr, tag = OSMO_GSUP_NODE_ADDR;
+				 sm_rp_rpi, tag = OSMO_GSUP_SM_RP_RPI;
 			)"
 };
 
@@ -161,7 +174,11 @@
 	GSUP_SessionState	session_state,
 	OCT4			session_id,
 	/* Supplementary Services */
-	octetstring		ss_info
+	octetstring		ss_info,
+	/* Short Message Service */
+	octetstring		smsc_addr, /* FIXME: octetstring? */
+	octetstring		node_addr, /* FIXME: octetstring? */
+	boolean			sm_rp_rpi /* FIXME: boolean? */
 };
 
 type record GSUP_PDU {
@@ -593,6 +610,51 @@
 	}
 }
 
+template (value) GSUP_IE ts_GSUP_IE_SMSC_ADDR(octetstring addr) := {
+	tag := OSMO_GSUP_SMSC_ADDR,
+	len := 0, /* overwritten */
+	val := {
+		smsc_addr := addr
+	}
+}
+template GSUP_IE tr_GSUP_IE_SMSC_ADDR(template octetstring addr) := {
+	tag := OSMO_GSUP_SMSC_ADDR,
+	len := ?,
+	val := {
+		smsc_addr := addr
+	}
+}
+
+template (value) GSUP_IE ts_GSUP_IE_NODE_ADDR(octetstring addr) := {
+	tag := OSMO_GSUP_NODE_ADDR,
+	len := 0, /* overwritten */
+	val := {
+		node_addr := addr
+	}
+}
+template GSUP_IE tr_GSUP_IE_NODE_ADDR(template octetstring addr) := {
+	tag := OSMO_GSUP_NODE_ADDR,
+	len := ?,
+	val := {
+		node_addr := addr
+	}
+}
+
+template (value) GSUP_IE ts_GSUP_IE_SM_RP_RPI(boolean val) := {
+	tag := OSMO_GSUP_SM_RP_RPI,
+	len := 0, /* overwritten */
+	val := {
+		sm_rp_rpi := val
+	}
+}
+template GSUP_IE tr_GSUP_IE_SM_RP_RPI(template boolean val) := {
+	tag := OSMO_GSUP_SM_RP_RPI,
+	len := ?,
+	val := {
+		sm_rp_rpi := val
+	}
+}
+
 template (value) GSUP_IE ts_GSUP_IE_SSInfo(octetstring ss) := {
 	tag := OSMO_GSUP_SS_INFO_IE,
 	len := 0, /* overwritten */
@@ -714,6 +776,83 @@
 	}
 );
 
+template (value) GSUP_PDU ts_GSUP_SRI_FOR_SM_REQ(
+	OCT4 sid, /* TCAP TransactionID */
+	/* TODO: having IMSI instead of MSISDN is also legal */
+	hexstring msisdn, /* MSISDN of subscriber */
+	boolean sm_rp_rpi, /* See 3GPP TS 29.002, 7.6.8.5 */
+	octetstring smsc_addr /* Address of SMSC */
+) := ts_GSUP(
+	OSMO_GSUP_MSGT_SRI_FOR_SM_REQUEST,
+	{
+		valueof(ts_GSUP_IE_SessionId(sid)),
+		valueof(ts_GSUP_IE_MSISDN(msisdn)),
+		valueof(ts_GSUP_IE_SM_RP_RPI(sm_rp_rpi)),
+		valueof(ts_GSUP_IE_SMSC_ADDR(smsc_addr))
+	}
+);
+template GSUP_PDU tr_GSUP_SRI_FOR_SM_REQ(
+	template OCT4 sid := ?, /* TCAP TransactionID */
+	/* TODO: having IMSI instead of MSISDN is also legal */
+	template hexstring msisdn, /* MSISDN of subscriber */
+	template boolean sm_rp_rpi, /* See 3GPP TS 29.002, 7.6.8.5 */
+	template octetstring smsc_addr /* Address of SMSC */
+) := tr_GSUP(
+	OSMO_GSUP_MSGT_SRI_FOR_SM_REQUEST,
+	{
+		tr_GSUP_IE_SessionId(sid),
+		tr_GSUP_IE_MSISDN(msisdn),
+		tr_GSUP_IE_SM_RP_RPI(sm_rp_rpi),
+		tr_GSUP_IE_SMSC_ADDR(smsc_addr)
+	}
+);
+
+template (value) GSUP_PDU ts_GSUP_SRI_FOR_SM_RES(
+	OCT4 sid, /* TCAP TransactionID */
+	hexstring imsi, /* IMSI of subscriber */
+	octetstring node_addr /* Address of serving node (e.g. HLR) */
+) := ts_GSUP(
+	OSMO_GSUP_MSGT_SRI_FOR_SM_RESULT,
+	{
+		valueof(ts_GSUP_IE_SessionId(sid)),
+		valueof(ts_GSUP_IE_IMSI(imsi)),
+		valueof(ts_GSUP_IE_NODE_ADDR(node_addr))
+	}
+);
+template GSUP_PDU tr_GSUP_SRI_FOR_SM_RES(
+	template OCT4 sid := ?, /* TCAP TransactionID */
+	template hexstring imsi, /* IMSI of subscriber */
+	template octetstring node_addr /* Address of serving node (e.g. HLR) */
+) := tr_GSUP(
+	OSMO_GSUP_MSGT_SRI_FOR_SM_RESULT,
+	{
+		tr_GSUP_IE_SessionId(sid),
+		tr_GSUP_IE_IMSI(imsi),
+		tr_GSUP_IE_NODE_ADDR(node_addr)
+	}
+);
+
+template (value) GSUP_PDU ts_GSUP_SRI_FOR_SM_ERR(
+	OCT4 sid, /* TCAP TransactionID */
+	integer cause /* User error, see 12.1.3 */
+) := ts_GSUP(
+	OSMO_GSUP_MSGT_SRI_FOR_SM_ERROR,
+	{
+		valueof(ts_GSUP_IE_SessionId(sid)),
+		valueof(ts_GSUP_IE_Cause(cause))
+	}
+);
+template GSUP_PDU tr_GSUP_SRI_FOR_SM_ERR(
+	template OCT4 sid := ?, /* TCAP TransactionID */
+	template integer cause := ? /* User error, see 12.1.3 */
+) := tr_GSUP(
+	OSMO_GSUP_MSGT_SRI_FOR_SM_ERROR,
+	{
+		tr_GSUP_IE_SessionId(sid),
+		tr_GSUP_IE_Cause(cause)
+	}
+);
+
 function f_gsup_find_ie(GSUP_PDU msg, GSUP_IEI iei, out GSUP_IeValue ret) return boolean {
 	for (var integer i := 0; i < sizeof(msg.ies); i := i+1) {
 		if (msg.ies[i].tag == iei) {

-- 
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I7c1a882748d82ed5ef0b22cf1ae5764da5e874a0
Gerrit-Change-Number: 11061
Gerrit-PatchSet: 1
Gerrit-Owner: Vadim Yanitskiy <axilirator at gmail.com>
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