Change in osmo-gbproxy[master]: gpproxy: Route BSSGP STATUS with PDU_IN_ERROR containing a TMSI

daniel gerrit-no-reply at lists.osmocom.org
Wed Jul 28 11:04:51 UTC 2021


daniel has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-gbproxy/+/25078 )


Change subject: gpproxy: Route BSSGP STATUS with PDU_IN_ERROR containing a TMSI
......................................................................

gpproxy: Route BSSGP STATUS with PDU_IN_ERROR containing a TMSI

Derive a foreign TLLI from a TMSI and route the message according to it

Related: OS#4892
Change-Id: Iebda9e9fd433cd28c0f657adc4d475d4e6e247ba
---
M src/gb_proxy.c
1 file changed, 5 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-gbproxy refs/changes/78/25078/1

diff --git a/src/gb_proxy.c b/src/gb_proxy.c
index f473c39..0815041 100644
--- a/src/gb_proxy.c
+++ b/src/gb_proxy.c
@@ -1003,6 +1003,11 @@
 
 	if (TLVP_PRESENT(tp, BSSGP_IE_TLLI)) {
 		*tlli = osmo_load32be(TLVP_VAL(tp, BSSGP_IE_TLLI));
+	} else if (TLVP_PRESENT(tp, BSSGP_IE_TMSI)) {
+		/* we treat the TMSI like a TLLI and extract the NRI from it */
+		*tlli = osmo_load32be(TLVP_VAL(tp, BSSGP_IE_TMSI));
+		/* Convert the TMSI into a FOREIGN TLLI so it is routed appropriately */
+		*tlli = gprs_tmsi2tlli(*tlli, TLLI_FOREIGN);
 	} else {
 		return -ENOENT;
 	}

-- 
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Gerrit-Project: osmo-gbproxy
Gerrit-Branch: master
Gerrit-Change-Id: Iebda9e9fd433cd28c0f657adc4d475d4e6e247ba
Gerrit-Change-Number: 25078
Gerrit-PatchSet: 1
Gerrit-Owner: daniel <dwillmann at sysmocom.de>
Gerrit-MessageType: newchange
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