Change in osmo-sgsn[master]: sgsn_rim: Add routing for (GERAN) BSSGP RIM messages

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dexter gerrit-no-reply at lists.osmocom.org
Mon Jan 25 22:20:08 UTC 2021


dexter has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-sgsn/+/22110 )

Change subject: sgsn_rim: Add routing for (GERAN) BSSGP RIM messages
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Patch Set 5:

(2 comments)

https://gerrit.osmocom.org/c/osmo-sgsn/+/22110/4/src/sgsn/sgsn_rim.c 
File src/sgsn/sgsn_rim.c:

https://gerrit.osmocom.org/c/osmo-sgsn/+/22110/4/src/sgsn/sgsn_rim.c@49 
PS4, Line 49: 		retu
> shouldn't we return a RIM-ERROR or RIM-APPLICATION-ERROR here?  IMHO RIM is really one layer above/i […]
I think this is correct (see spec ref below). Its probably a bit odd to say the address is invalid because we do not support GERAN, but I couldn't find a better cause code.

Also I think that RIM-ERROR or RIM-APPLICATION-ERROR are used by the application to communicate  errors.


https://gerrit.osmocom.org/c/osmo-sgsn/+/22110/4/src/sgsn/sgsn_rim.c@54 
PS4, Line 54: 		retu
> likewise here. […]
This should be correct as it is, done on BSSGP level. The spec says:

3GPP TS 48.018 8c.3.1.3 If an SGSN receives from a BSS a RIM PDU with an invalid destination address, the PDU shall be discarded and a STATUS PDU with the cause value set to "Unknown Destination address" shall be sent back to the BSS.



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Gerrit-Project: osmo-sgsn
Gerrit-Branch: master
Gerrit-Change-Id: I6fde8ab8955660b48000ca1b650cfc7c7b2e24ba
Gerrit-Change-Number: 22110
Gerrit-PatchSet: 5
Gerrit-Owner: dexter <pmaier at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-CC: laforge <laforge at osmocom.org>
Gerrit-Comment-Date: Mon, 25 Jan 2021 22:20:08 +0000
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