libosmo-sccp - SCCP Library

Age	Commit message (Collapse)	Author	Files	Lines
2022-06-29	xua_snm: assert to guard against NULL ptr	Pau Espin Pedrol	1	-0/+2
	This is similarly done for same IE in other functions, so let's do it here too in order to make coverity happy, and avoid random access ptr probably ending up in obscure crash. Fixes: Coverity CID#272994 Change-Id: I72059ffaa608bb4f5c4bd274645878e0b31ed6e0
2022-05-05	M3UA/SUA: Implement handling of SCON (signaling congestion)	Harald Welte	1	-0/+65
	If we receive any M3UA/SUA SNM SCON mesasages, distribute them to any other active ASP to make everyone aware of the congestion situation. This makes STP_Tests_M3UA.TC_ssnm_distribution_scon pass and hence should turn the entire osmo-stp test suite "green" Change-Id: Iac7aeba980fbbd8b58f8872a29ba10745eb0a730
2021-02-10	xua_snm: Implement handling of DUPU messages	Harald Welte	1	-0/+82
	A DUPU message in SUA and M3UA indicates the unavailability of a (MTP-level) user, i.e. the entire SCCP, ISUP, ... is not available. If we receive a DUPU (destination user part unavailable) message in ASP role, then we must * distribute it to any other ASPs for which we operate in SG mode * pass it as MTP-STATUS.ind to SCCP, which can then generates N-PCSTATE.ind to the SCCP User Change-Id: I1559ed0f761a8495b222df48c6bd43798e220471
2021-02-10	sua: per-ssn DUNA/DAVA notification	Harald Welte	1	-2/+79
	Unlike M3UA, in SUA a DUNA/DAVA message can contain not just the point code that became available / unavailable, but it can also include a SSN. In that case, it is just the SSN that became available/unavailable, and not the entire point code. Hence, a N-STATE.ind and not a N-PCSTATE.ind must be delivered to the SCCP user. Change-Id: Ie9a45b905bc17e7b695e15fe12ba4bbadcd032bf
2021-02-08	sccp: Notify users of point code available/unavailable	Harald Welte	1	-0/+37
	* add N-PCSTATE.ind and N-STATE.ind definitions to SCCP user SAP * add minimal SCMG (SCCP Management) and LBCS (Local Broadcast) * generate MTP-PAUSE.ind/MTP-RESUME.ind based on received xUA DUNA/DAVA * generate N-PCSTATE.ind towards the local SCCP users Change-Id: Idb799f7d7ab329ad12f07b7cbe6336da0891ae92 Related: OS#2623, OS#3403, OS#4701
2021-02-08	xua: Implement SNM availability/unavailability messaging	Harald Welte	1	-0/+211
	M3UA and SUA have one sub-protocol called [S]SNM, through which the SG informs the ASP about certain destinations (point codes) becoming available (DAVA) or unavailable (DUNA) in the SS7 network. This patch adds support for * generating DAVA/DUAN on a SGP when the AS FSM changes to/from AS-ACTIVE * receiving DAVA/DUNA on an ASP and informing other "SG role" AS/ASP * processing DAUD from ASP received by SG, generating relate DAVA/DUNA responses Related: OS#2623 Change-Id: Id92be4691b0fd77598a6edb642c028bbd8c5b623