| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
A recent patch fixed a long problem where the ASP name (instead of
expected AS name) was used as ipa_unit_name in IPA based ASPs.
For server side it doesn't matter much, sense anyway the ipa_unit_name
is actually restored on the struct with what's received in IPA GET_RESP
message (see ipa_asp_fsm_wait_id_resp()). So the fix was actually for
the client side in the scenario where a non-dynamic ASP with an assigned
AS was configured in the VTY.
However, dynamic ASPs usually have no assigned AS (because in general it
is really not created/configured, as the ASP is created on the flight).
As a result, the recent patch (see "Fixes" below), broke dynamic ASPs
case because from then one ipa_asp_fsm_start() would fail and terminate
the FSM because ipa_find_as_for_asp() was returning NULL.
So improve the recent patch by applying the previous logic for dynamic
ASPs:
* On the server side, it really doesn't matter since as mentioned, the
field will be repopulated later on, but allows the code to avoid
terminating the FSM and hence be brought up and be ready to receive
clients.
* On the client case, this is how dynamic IPA ASPs were ment to be used
when they were introduced anyway (use ASP as ipa_unit_id, meaning
"AS name" == "ASP name").
Furthermore, on the client side, the non-dynamic IPA ASPs need their
bring up be delayed until assigned to an AS, because the AS name is sent
in ipa_unit_name field in Tx IPA ID RESP.
This usually happens at a later point than ASP (FSM) creation, because
first the ASP object is created (through VTY or API) and then assigned
to an AS through osmo_ss7_as_add_asp() usually from a later "asp" vty
command in the "as" node.
Fixes: 65741dca056e3a16973ad156dd4c09760a6a945b
Change-Id: I0a741449450c998253b1e44a76a3b7fc224e0903
Related: SYS#5914
|
|
This supersedes the library-internal enum xua_asp_role.
Change-Id: I28b0888b8f8206e9dd67ef64ce0f71ba9a7105ce
|
|
This tries as good as possible to fit the IPA/SCCPlite stacking into the
existing SIGTRAN/SS7 code architecture/model. To the user, the IPA
protocol looks like yet another protocol on the same level as the choice
between SUA and M3AU. On the inside, things are obviously quite
different.
We need to handle TCP with IPA framing instead of SCTP for both server
and client. We also implement an alternative "ASP FSM" for IPA, which
takes care of the CCM handshake (ID_REQ/ID_RESP/ID_ACK/ID_ACK2) for both
client and server mode.
In server mode, we use the 'unit name' as identifier to look up the AS,
similar to how we use a routing context to look up the AS in the xUA
case.
We also have to bypass activating the default layer manager in the
simple client to make sure we don't run into even more complexity.
What's missing right now is some way to manually override/set the point
codes. As IPA/SCCPlite is missing any routing label, we currently
simply generate one with SPC=0/DPC=0, which will obviously not work in
most configurations.
Change-Id: I9098574cddeba10fcf8f1b6c196a7069a6805c56
|
|
For classic xUA this is not needed, as the server doesn't have to react
to establishment of the SCTP connection. The client will start with an
ASP_UP_REQ. However, in upcoming IPA support, the FSM will need to
react on this event.
Change-Id: Ib10914b27f8761ea44a0fdba96c045821223722a
|
|
This is what aims to be a rather complete/proper implementation of the
SIGTRAN + SS7 protocol suite. It has proper abstraction between the
layers with primitives, finite state machines for things like the AS and
ASP state machines, support for point code routing, etc.
What's not implemented at this point:
* re-integration of pre-existing SUA (pending)
* actual MTP2 and physical E1/T1 link support
* different trafic modes like broadcast/fail-over/load-balance
Change-Id: I375eb80f01acc013094851d91d1d3333ebc12bc7
|
