osmith has uploaded this change for review. (
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/38381?usp=email )
Change subject: library/GTPv1U_Templates: support sending ext hdrs
......................................................................
library/GTPv1U_Templates: support sending ext hdrs
Replace the seq (sequenceNumber) parameter in ts_GTP1U_PDU with
opt_part (GTPU_Header_optional_part). opt_part contains seq:
type record GTPU_Header_optional_part {
OCT2 sequenceNumber,
OCT1 npduNumber,
OCT1 nextExtHeader,
GTPU_ExtensionHeader_List gTPU_extensionHeader_List optional
}
With this change it is possible to set the extension headers too when
sending GTPU packets. This is in preparation for a GGSN test case with
extension headers.
Related: OS#6223
Change-Id: I5b1668d45f4454f92c234054678e17145bd4fe49
---
M epdg/EPDG_Tests.ttcn
M ggsn_tests/GGSN_Tests.ttcn
M hnodeb/HNBGW_ConnectionHandler.ttcn
M library/GTPv1U_Templates.ttcn
M sgsn/BSSGP_ConnHdlr.ttcn
5 files changed, 31 insertions(+), 19 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks
refs/changes/81/38381/1
diff --git a/epdg/EPDG_Tests.ttcn b/epdg/EPDG_Tests.ttcn
index f963994..d9300a6 100644
--- a/epdg/EPDG_Tests.ttcn
+++ b/epdg/EPDG_Tests.ttcn
@@ -862,7 +862,7 @@
}
private function f_GTP1U_send(octetstring payload) runs on EPDG_ConnHdlr {
var Gtp1uPeer peer :=
valueof(ts_GtpPeerU(f_inet_addr(g_pars.bearer.gtpu_addr_remote)));
- GTP2.send(ts_GTP1U_GPDU(peer, 0 /*seq*/, g_pars.bearer.teid_remote,
payload));
+ GTP2.send(ts_GTP1U_GPDU(peer, omit /*opt_part*/,
g_pars.bearer.teid_remote, payload));
}
private function f_GTP1U_echo_ping_pong(uint16_t seq_nr := 0) runs on
EPDG_ConnHdlr {
var Gtp1uPeer peer :=
valueof(ts_GtpPeerU(f_inet_addr(g_pars.bearer.gtpu_addr_remote)));
diff --git a/ggsn_tests/GGSN_Tests.ttcn b/ggsn_tests/GGSN_Tests.ttcn
index 7f4a7bb..e88ab80 100644
--- a/ggsn_tests/GGSN_Tests.ttcn
+++ b/ggsn_tests/GGSN_Tests.ttcn
@@ -399,12 +399,14 @@
/* send GTP-U for a given context and increment sequence number */
function f_send_gtpu(inout PdpContext ctx, in octetstring data) runs on
GT_CT {
+ var template (omit) GTPU_Header_optional_part opt_part;
+
if (use_gtpu_txseq) {
- GTPU.send(ts_GTP1U_GPDU(g_peer_u, g_d_seq_nr,
ctx.teid_remote, data));
+ opt_part := f_GTPU_opt_part_from_seq(g_d_seq_nr);
g_d_seq_nr := (g_d_seq_nr + 1) mod 65536;
- } else {
- GTPU.send(ts_GTP1U_GPDU(g_peer_u, omit,
ctx.teid_remote, data));
}
+
+ GTPU.send(ts_GTP1U_GPDU(g_peer_u, opt_part, ctx.teid_remote,
data));
}
function f_handle_create_req(inout PdpContext ctx, in Gtp1cUnitdata ud,
in template OCT1 exp_cause := '80'O) runs on GT_CT {
diff --git a/hnodeb/HNBGW_ConnectionHandler.ttcn
b/hnodeb/HNBGW_ConnectionHandler.ttcn
index a72b5f2..5afeede 100644
--- a/hnodeb/HNBGW_ConnectionHandler.ttcn
+++ b/hnodeb/HNBGW_ConnectionHandler.ttcn
@@ -200,7 +200,7 @@
function f_gtpu_send(uint32_t tei, octetstring payload) runs on HNBGW_ConnHdlr
{
var Gtp1uPeer peer := valueof(ts_GtpPeerU(g_pars.hnodeb_addr));
- GTP[0].send(ts_GTP1U_GPDU(peer, 0 /*seq*/, int2oct(tei, 4), payload));
+ GTP[0].send(ts_GTP1U_GPDU(peer, omit /*opt_part*/, int2oct(tei, 4),
payload));
}
/* HNBLLIF socket may at any time receive a new INFO.ind */
diff --git a/library/GTPv1U_Templates.ttcn b/library/GTPv1U_Templates.ttcn
index c242115..6efb96b 100644
--- a/library/GTPv1U_Templates.ttcn
+++ b/library/GTPv1U_Templates.ttcn
@@ -34,14 +34,24 @@
gtpu_IEs := ies
}
- function f_GTPU_s_bit(template (omit) uint16_t seq) return BIT1 {
- if (istemplatekind(seq, "omit")) {
+ function f_GTPU_s_bit(template (omit) GTPU_Header_optional_part
opt_part) return BIT1 {
+ if (istemplatekind(opt_part, "omit")) {
return '0'B;
}
return '1'B;
}
- function f_GTPU_opt_part(template (omit) uint16_t seq) return template
(omit) GTPU_Header_optional_part {
+ function f_GTPU_e_bit(template (omit) GTPU_Header_optional_part
opt_part) return BIT1 {
+ if (istemplatekind(opt_part, "omit")) {
+ return '0'B;
+ }
+ if (istemplatekind(opt_part.gTPU_extensionHeader_List, "omit"))
{
+ return '0'B;
+ }
+ return '1'B;
+ }
+
+ function f_GTPU_opt_part_from_seq(template (omit) uint16_t seq) return
template (omit) GTPU_Header_optional_part {
if (istemplatekind(seq, "omit")) {
return omit;
}
@@ -56,7 +66,7 @@
/* generalized GTP-U send template */
template (value) PDU_GTPU ts_GTP1U_PDU(template (value) OCT1 msg_type,
- template (omit) uint16_t seq,
+ template (omit)
GTPU_Header_optional_part opt_part,
template (value) OCT4 teid,
template (value) GTPU_IEs ies)
:= {
/* N-PDU Number flag (PN): the GTP-U header contains a
meaningful N-PDU Number field if the PN
@@ -69,9 +79,9 @@
* Note that the caller must ensure that these conditions hold.
* The caller can either pass a sequence number (we set s_bit
to '1'B) when appropriate,
* or may omit the sequence number (we set s_bit to '0'B). */
- s_bit := f_GTPU_s_bit(seq),
+ s_bit := f_GTPU_s_bit(opt_part),
/* Extension header presence */
- e_bit := '0'B,
+ e_bit := f_GTPU_e_bit(opt_part),
spare := '0'B,
/* Protocol Type flag (PT) shall be set to '1' in GTP */
pt := '1'B,
@@ -80,7 +90,7 @@
messageType := msg_type,
lengthf := 0, /* we assume encoder overwrites this */
teid := teid,
- opt_part := f_GTPU_opt_part(seq),
+ opt_part := opt_part,
gtpu_IEs := ies
}
@@ -119,7 +129,7 @@
template (value) Gtp1uUnitdata ts_GTPU_PING(template (value) Gtp1uPeer
peer,
template (value) uint16_t
seq) := {
peer := peer,
- gtpu := ts_GTP1U_PDU('01'O, seq, '00000000'O, ts_UEchoReqPDU)
+ gtpu := ts_GTP1U_PDU('01'O, f_GTPU_opt_part_from_seq(seq),
'00000000'O, ts_UEchoReqPDU)
}
template GTPU_IEs ts_UEchoRespPDU(template (value) OCT1
restart_counter) := {
@@ -137,7 +147,7 @@
template (value) uint16_t
seq,
template (value) OCT1
rest_ctr) := {
peer := peer,
- gtpu := ts_GTP1U_PDU('02'O, seq, '00000000'O,
ts_UEchoRespPDU(rest_ctr))
+ gtpu := ts_GTP1U_PDU('02'O, f_GTPU_opt_part_from_seq(seq),
'00000000'O, ts_UEchoRespPDU(rest_ctr))
}
template (present) GSNAddress_gtpu tr_UGsnAddr(template (present)
octetstring ip_addr := ?) := {
@@ -189,15 +199,15 @@
template (value)
OCT4 teid,
template (value)
octetstring gsn_addr) := {
peer := peer,
- gtpu := ts_GTP1U_PDU('1A'O, seq, '00000000'O,
ts_UErrorIndication(teid, gsn_addr))
+ gtpu := ts_GTP1U_PDU('1A'O, f_GTPU_opt_part_from_seq(seq),
'00000000'O, ts_UErrorIndication(teid, gsn_addr))
}
/* master template for sending a GTP-U user plane data */
template (value) Gtp1uUnitdata ts_GTP1U_GPDU(template (value) Gtp1uPeer
peer,
- template (omit) uint16_t
seq,
+ template (omit)
GTPU_Header_optional_part opt_part,
template (value) OCT4 teid,
template (value)
octetstring data) := {
peer := peer,
- gtpu := ts_GTP1U_PDU('FF'O, seq, teid, { g_PDU_IEs := { data :=
data }})
+ gtpu := ts_GTP1U_PDU('FF'O, opt_part, teid, { g_PDU_IEs := {
data := data }})
}
}
diff --git a/sgsn/BSSGP_ConnHdlr.ttcn b/sgsn/BSSGP_ConnHdlr.ttcn
index 055902a..c39b614 100644
--- a/sgsn/BSSGP_ConnHdlr.ttcn
+++ b/sgsn/BSSGP_ConnHdlr.ttcn
@@ -1060,7 +1060,7 @@
peer := valueof(ts_GtpPeerU(apars.sgsn_ip_u));
rem_teid := apars.sgsn_tei_u;
}
- GTP[GTP_GGSN_IDX].send(ts_GTP1U_GPDU(peer, 0 /*seq*/, rem_teid,
payload));
+ GTP[GTP_GGSN_IDX].send(ts_GTP1U_GPDU(peer, omit /*opt_part*/, rem_teid,
payload));
}
altstep as_xid(PdpActPars apars, integer ran_index := 0) runs on
BSSGP_ConnHdlr {
@@ -1143,7 +1143,7 @@
} else if (is_iu(ran_index)) {
/* Send PDU via GTPv1U from simulated MS/RNC directly to the
simulated GGSN: */
rx_peer := valueof(ts_GtpPeerU(apars.rnc_ip_u));
-
GTP[ran2gtp_idx(ran_index)].send(ts_GTP1U_GPDU(valueof(ts_GtpPeerU(apars.ggsn_ip_u)),
0 /*seq*/, apars.ggsn_tei_u, payload));
+
GTP[ran2gtp_idx(ran_index)].send(ts_GTP1U_GPDU(valueof(ts_GtpPeerU(apars.ggsn_ip_u)),
omit /*opt_part*/, apars.ggsn_tei_u, payload));
}
/* Expect PDU via GTP from RNC/SGSN on simulated GGSN */
alt {
--
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Gerrit-MessageType: newchange
Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I5b1668d45f4454f92c234054678e17145bd4fe49
Gerrit-Change-Number: 38381
Gerrit-PatchSet: 1
Gerrit-Owner: osmith <[email protected]>
