Change in osmo-sgsn[master]: gbproxy: Fix radio status routing by TMSI

[laforge]

laforge has submitted this change. ( https://gerrit.osmocom.org/c/osmo-sgsn/+/22363 )

Change subject: gbproxy: Fix radio status routing by TMSI
......................................................................

gbproxy: Fix radio status routing by TMSI

If a radio status message contains a TMSI it should be routed as if it
was a TLLI. Convert the TMSI to (foreign) TLLI so NRI-routing works.

Both foreign and local TLLIs are routed the same.

Fixes: OS#4954
Change-Id: Ifd64f02fa16b44f8e2e19eb8ba973f50a829ead5
---
M src/gbproxy/gb_proxy.c
1 file changed, 2 insertions(+), 0 deletions(-)

Approvals:
  Jenkins Builder: Verified
  pespin: Looks good to me, but someone else must approve
  laforge: Looks good to me, approved



diff --git a/src/gbproxy/gb_proxy.c b/src/gbproxy/gb_proxy.c
index b573adc..1dc3114 100644
--- a/src/gbproxy/gb_proxy.c
+++ b/src/gbproxy/gb_proxy.c
@@ -417,6 +417,8 @@
 		} 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);
 			rc = gbprox_bss2sgsn_tlli(bss_bvc->cell, msg, &tlli, false);
 		} else if (TLVP_PRESENT(&tp, BSSGP_IE_IMSI)) {
 			/* FIXME: Use the IMSI as selector? */

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Gerrit-Project: osmo-sgsn
Gerrit-Branch: master
Gerrit-Change-Id: Ifd64f02fa16b44f8e2e19eb8ba973f50a829ead5
Gerrit-Change-Number: 22363
Gerrit-PatchSet: 2
Gerrit-Owner: daniel <dwillmann at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: laforge <laforge at osmocom.org>
Gerrit-Reviewer: lynxis lazus <lynxis at fe80.eu>
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-MessageType: merged
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