Rename the variables to refer to the fact that they are
the ports of the remote.
So we have:
rtp_port as the local address we are binding to
net_rtp for the network rtp
bsc_rtp for the bsc rtp
Harald actually pointed out that this feature is just NAT. We want
to connect n-real BSCs to one BSC Mux. We will talk the ip.access
protocol and SCCP over of this link.
The mux will drop certain GSM messages (like the reset), it will
replace source local reference (NAT functionality) and it will handle
some GSM08.08 specially.
Get the thing started...
Currently "write memory" will not store the rtp_base_port of the
network. Fix that by writing it out in write_net. Also set it to
4000 by default in the MGCP and in the BSC.
The LAI generation wants to have 16bit unsigned, just keep
them like this already. This means the int32_t will be truncated
inside the get_*_code methods which is better than doing it
somewhere else.
* Be able to have a country code in the air but use a different
country code when talking to the core network.
* Now both country and network code can be different on air and
on the MSC communication.
This is partially reverting 0603c9d9e5,
it is true that the ip.access Wireshark dissectors differentiate
TCH/H from TCH/F but in my test I'm unable to send RTP on to the
BTS. It might be that the RTP payload provided in the MDCX is not
the one it will accept with the 0x05 mode. More work needs to be
done to understand this, that is the reason it is comitted to the
on-waves's branch instead of master.
* Make it possible to have a different MNC in the RSL traffic
than in the core network.
* Introduce the "core network code NUMBER" variable. If it is
set this network code will be used in traffic with the MSC.
* Use the core_network_code number when sending a packet to
the MSC
* Regenerate the LAI (this is where I could have a bug) when
sending packets to the BTS.
* Add size checks.
This is not tested, I might got something wrong.
With forward IP in the config and early bind on we will
simply forward RTP data on the endpoints from BTS to the
forward IP address.
This is implemented by disabling MGCP functionality when
a forward IP address was specified, setting the forward IP
in the endp->remote and assigning a ci != CI_UNUSED.
Early bind will make sure the sockets are created, the BSC FD's
are registered and then the normal dispatch code will
do the forwarding.
Conflicts:
openbsc/include/openbsc/Makefile.am
openbsc/include/openbsc/gsm_data.h
openbsc/src/Makefile.am
openbsc/src/abis_rsl.c
openbsc/src/chan_alloc.c
openbsc/src/gsm_04_08.c
openbsc/src/gsm_data.c
openbsc/src/vty_interface.c
The biggest problem is the moving of the RTP code into
the RSL layer. This may break quite some things...
we need to set newbfd->priv_nr to 2+trx_id, rather than keeping
it '2' all the time, as it is used to look-up the e1i_ts when
we receive a packet. A constant '2' would always match to TRX 0.
we also need to keep one separate bit for each TRX state in order
to properly generate the EVT_E1_TEI_UP event for trx > 0.
This implements the handover algorithm (and associated parameters)
as described in Chapter 8 of the book "Performance Enhancements in
a Frequency |Hopping GSM Network" by Thomas Toftegard Nielsen and Jeroen
Wigard.
The parameters such as averaging windows are configured in struct
gsm_network. We keep some state to trakc up to 10 neighbors as
they are being reported from the MS.
This has so far only been tested in a network with two BTS that
have each other as neighbor. Networks with morge neighbors might
encounter bugs.
This allows us to block packets that we have received after the channel
is no longer being used. This is visible during handover, where we still
receive a measurement report after the MS has switched to the new channel.
This leftover measurement report then attempts to trigger another handover,
which si bogus and will fail - and thus only consumes resources.
With the new LCHAN_S_ACTIVE state, we can check for this when processing
the measurement report.
This provides two functions: get_meas_rep_avg() to obtain the sliding
window average of one particular field, and meas_rep_n_out_of_m_be()
to check if at least N out of M measurments are >= BE.
If a RF channel is assigned but no response is ever heard from
the phone, we will receive a CONNECTION FAIL from the BTS,
triggering a RF release freeing the channel. Then sometime later,
T3101 will expire as well and free the channel again ...
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
- Need to use sms.id for the ORDER BY since 'subscriber' also has 'id'
- Need to add the join clause between 'SMS' and 'subscriber'
- Add a LIMIT 1 (probably no impact for the db size we're dealing with
here, but with large DB and mysql/postgresql this can help the planner)
- (fix a wrong comment in passing ...)
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
