laforge submitted this change.
hnb-test: use N(SD)=1 on MM Auth Response
The Authentication Response carries a hard-coded N(SD) of 2 in the
message type octet: 0x80 | GSM48_MT_MM_AUTH_RESP, with the comment
"simulate sequence nr 2". That predates the duplicate detection of
3GPP TS 24.007 section 11.2.3.2.3 in osmo-msc.
The Location Updating Request that opens the connection in the
InitialUE-Message is N(SD) = 0, so the Authentication Response, being
the second uplink MM message, has to be N(SD) = 1. With 2, osmo-msc
logs
Duplicate DTAP: bin=0, expected n_sd == 1, got 2
drops the response, and rejects the Location Update when its timer
expires.
Set N(SD) to 1 so the response reaches the VLR. The remaining uplink MM
messages are handled later in this series.
Change-Id: I4c71b404733e53d4e47d9ba5eb555b92eb1a771d
Signed-off-by: Andrei Gosman <andrei.gosman@gmail.com>
---
M tests/hnb-test.c
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tests/hnb-test.c b/tests/hnb-test.c
index bfccf5a..597d04f 100644
--- a/tests/hnb-test.c
+++ b/tests/hnb-test.c
@@ -220,7 +220,7 @@
{
uint8_t id_resp[] = {
GSM48_PDISC_MM,
- 0x80 | GSM48_MT_MM_AUTH_RESP, /* simulate sequence nr 2 */
+ 0x40 | GSM48_MT_MM_AUTH_RESP, /* N(SD) = 1: second uplink MM message after the LU Request */
0x61, 0xb5, 0x69, 0xf5 /* hardcoded SRES */
};
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