When the server (STP) disappears from a live SCCP client,
then the xUA default layer manager receives LM_E_SCTP_DISC_IND,
which is traversing retart_asp(). In there, we first terminate
the current instance of the layer manager FSM, and then re-initialize
the ASP to use the default layer manager using
osmo_ss7_asp_use_default_lm().
However, osmo_ss7_asp_use_default_lm() uses the presence of an
asp->lm_priv pointer as a sign that the old layer manager is still
running and attempts to terminate it - despite being terminated
just before in restart_as().
So let's simply remove the termination from restart_asp(), and
leave it to osmo_ss7_asp_use_default_lm().
Fixes: OS#2402
Change-Id: I062d3af17539de864b56d079fe9b8d76ad99cf1e
The function seems osmo_ss7_asp_use_default_lm() does not guard
against an asp->lm_priv FSM instance already existing. If this
function is called a second time, it will overwrite asp->lm_priv,
causing the original fsm instance to leaked.
Check if asp->lm_priv already exists and terminate (free) the
FSM if present.
Change-Id: I4ad435c042a435c4e641c6e5c53b91265dd23d40
This "default layer manager" can optionally be used by a xUA ASP. It
will handle the xUA Layer Manager (xlm) primitives and use them to
behave as follows:
* bring the ASP into state "INACTIVE"
* see if the SG can match our connection (based on IP address + port
information) to a statically configured ASP configuration with
associated AS(s). If yes, it will send us a NOTIFY message with
AS-INACTIVE.
* if the above doesn't work, try to dynamically register a routing key
using RKM for the point code that was locally confiured on the
ASP/client. If that works, the SG will now have created ASP and AS
objects as well as a routing key and be able to serve us, sending the
NOTIFY with the AS-INACTIVE state.
* After either of the two above, we will attempt to transition into
ASP-ACTIVE. The SG should send us an AS-ACTIVE notification in return
* if anything fails, abort and disconnect the SCTP connection, restart
related FSMs and start from scratch
Change-Id: I78d4623dd213b5c59007a026a6cc3cfe5c04af50
Harald Welte
Philipp Maier