osmo-bts-virtual uses GSMTAP over multicast groups to communicate
with one or more virtphy instances. There are some well-known default
multicast groups, but those can also be overridden via the VTY.
The problem is: If you actually try that, osmo-bts-virtual will abort,
as we try to talloc_free() when using osmo_talloc_replace_string()
on the constant default string.
The proper solution is to talloc_strdup() the constant default string
when setting the default value in bts_model_phy_link_set_defaults().
Change-Id: Ia96fea891a22e5a3c47ce658eda130ba8d4fc411
Currently there's bts-virtual specific fields in gsm_bts which is not used
by other models and are always allocated.
An alternative would be having a union with different structs inside,
one per model, but since we already have the bts_model abstraction, in this
case it makes more sense to use that abstraction instead of filling code
with preprocessor ifdefs to guard against non-defined types, etc.
Existing model specific data is moved there.
This new infra will be user further in forthcoming commits.
Related: OS#4215
Change-Id: Ib17a752cdbaa7d5eb8c5dfa0b197f80a4f38b38e
This commit doesn't change internal logic of any model, only the API to
be able to return result of connect TS asyncrhonously since some models
(like osmo-bts-trx) require some time to process the result. This way
PDCH ACT/DEACT (N)ACK can be sent once the result of this long process
is known. For instance, nowadays in osmo-bts-trx we PDCH (DE)ACT ACK
before getting the result from SETSLOT on the TRX iface.
With this new API, bts_model_ts_connect doesn't return any value
synchronously. Instead, it is expected to always end up calling
cb_ts_connected with the return code from the TS activation process. 0
is considered a successs, while any other value is considered an error.
Change-Id: Ie073a4397dd2f1a691968d12b15b8b42f1e1b0cf
No need to pass -t num_trx anymore to specify number of TRX to use. It
is calculated based on dynamic allocation from VTY config.
Using parameter -t is flagged as deprecated and is transformed into a
NOOP por backward compatibility.
As a result, TRX now are allocated after the BTS is allocated and
initial config (pre-VTY) is applied.
A new function bts_trx_init() is added, to set default config on each
TRX during allocation and before setting VTY config on it.
A new per BTS model function bts_model_trx_init() is added, to allow
per model specific default configuration of each TRX.
Change-Id: Iab1a754ab12a626759f9f90aa66f87bdce65ac9c
This patch adds scheduler support for the channel combinations that
substitute SDCCH index 2 for a CBCH in either a SDCCH/8 or SDCCH/4.
Change-Id: Icc15603079a1709ec094f400a9bcf0008211890f
Closes: OS#1617
gsm_bts_role_bts was introduced at a time when we still shared
gsm_data_shared.[ch] between BSC and BTS, and where we then subsequently
needed a BTS-private structure. Since that sharing was abandoned quite
some time ago, we can merge gsm_bts_role_bts into gsm_bts and do away
with the bts/btsb dualism in a lot of the code.
Change-Id: I4fdd601ea873d9697f89a748cc77bcf7c978fa3e
Most of the BTS models do not or do register not all of thier
features to the the feature list.
- Update/extend the feature lists for all BTS-Models
Change-Id: I26765a64153368016921c2ac115b1c4aec9bc5e4
There are plenty of functions stubbed out in osmo-bts-virtual, let's
print a NOTICE level log message to be able to correlate any kind of
erroneous behavior with the fact that a given function has no actual
implementation.
Change-Id: Ib607d192f90af7fb2d5a8747de5527f39e3cfefa
The defaults must be set during bts_model_phy_link_set_defaults()
and can then later be overridden by the vty (from the config file).
They should only be written back to the file if they differ from
the default settings.
Change-Id: I5d7f2c1dc8bc3d11db5c607b664730e4dcd58c96
This patch adds a virtual physical layer designed to simulate the
Um air interface between BTS and MS. It does so by encapsulating MAC
blocks (Layer 2 PDUs) via GSMTAP and sending them through multicast UDP
streams, both in uplink and in downlink.
The purpose of this is enable testing without any radio hardware or
related licenses.
OsmocomBB has recently received as similar patch-set, adding a virty_phy
executable that can be run on a PC instead of the classic 'layer1'
firmware on a real phone.
Using GSMTAP means that one can use unmodified wireshark to decode the
messages exchanged on the virtual Um layer.
This code was originally started by Harald in January 2016, continued
by Sebastian Stumpf in late 2016 and early 2017, and finally completed
by Harald in July 2017.
Change-Id: I1bf7670975b1e367c1c62983020865a043542622
Harald Welte
Pau Espin
Philipp Maier