Allow configuring multiple MSCs and SGSNs. Show this in new transcript
test cnpool.vty and in sccp.dot chart.
Still use only the first CN link; actual CN link selection from the pool
follows in I66fba27cfbe6e2b27ee3443718846ecfbbd8a974.
Config examples and VTY tests cfg files will be adjusted to the new cfg
syntax in patch If999b71a8a8237699f6ccfcaa31d1885e66c0518. Only the VTY
write() changes are visible here, to pass all transcript tests.
Related: SYS#6412
Change-Id: I5479eded786ec26062d49403a8be12967f113cdb
Prepare for CN pooling; allow using separate SS7 instances for IuCS and
IuPS.
New struct hnbgw_sccp_user describes a RANAP SCCP user, one per cs7.
Limit struct hnbgw_cnlink to describing a CN peer, using whichever SCCP
instance that is indicated by hnbgw_sccp_user.
Chart sccp.dot shows the changes made.
Related: SYS#6412
Change-Id: Iea1824f1c586723d989c80a909bae16bd2866e08
Show current use of SCCP and SS7 by osmo-hnbgw, which is about to
change (along with this chart).
Related: SYS#6422
Change-Id: I109948758de998326a5e9f0dcdc84d5f11dfba02
The RUA side may disconnect
a) gracefully (RUA Disconnect with RANAP IU Release Complete) or
b) by detecting that the HNB is gone / has restarted
For a), the SCCP side waits for a RLSD from the CN that follows the IU
Release Complete.
For b), we so far also wait for a RLSD from CN, which will never come,
and only after a timeout send an SCCP RLSD to the CN.
Instead, for b), immediately send an SCCP RLSD.
To distinguish between the graceful release (a) and the disruptive
release (b), add new state MAP_RUA_ST_DISRUPTED on the RUA side,
and add new event MAP_SCCP_EV_RAN_LINK_LOST for the SCCP side.
Any non-graceful disconnect of RUA enters ST_DISRUPTED.
disrupted_onenter() dispatches EV_RAN_LINK_LOST to SCCP,
and SCCP directly sends RLSD to the CN without timeout.
These changes are also shown in doc/charts/hnbgw_context_map.msc.
Change-Id: I4e78617ad39bb73fe92097c8a1a8069da6a7f6a1
Planning new connection-oriented RUA and SCCP FSMs to
- conquer confusion about hnbgw_context_map release behavior, and
- eradicate SCCP connection leaks.
Related: SYS#6297
Change-Id: I661bf65d79972a732c52732934095e8bfcd99694
Neels Hofmeyr