The current code tries to find _one_ bsc for a paging message
and then continues. The new code will try to find multiple BSCs
for each LAC. This is done in preparation of having two BSCs
handle the same LAC. This code right now is O(m*n) but it will
be worse once paging groups are landed.
The code to test the function was reduced to just test the lac
lookup code as the other part can not be tested in a standalone
setup anymore.
Be able to configure a list of destinations (duplicates allowed)
that will be tried in a round robin fashion. The change is in
the bsc_msc_connection to operate on a list. We achieve the
round robin nature with the same trick used in the paging code
to delete and append the current entry. The nat code was updated
to compile but one can only configure one destination.
For restarting the NAT we can now block it, it will not accept
new connections and for existing connections it will attempt
to drop them over time. A blocked NAT will end up with no BSC
connections left and then can be safely restarted.
In case this is a local USSD connection we will ignore
the clear command and respond with a RLC to any RLSD but
will never forward that to the BSC. This way the external
USSD is fully in charge of the connection.
There are theoretical issues if there are multiple transactions
on the same SCCP Connection but this can not be solved properly
right now.
Keep track of the used transaction identifier and always forward
messages to the USSD provider. E.g. this can be used to have a
dialogue going. Right now it is still possible that the MSC will
close down the connection.
We need to and out the protocol discriminator as call control
might have use transactions. This has only failed for the USSD
filter so far as this must deal with transactions.
Now ipaccess_idtag_parse() returns -EINVAL instead of -1. We also
check for the return value of this function in every invocation to
skip further processing in case of messages with malformed TLVs.
This idea was suggested by Zecke.
For the USSD module we only want to handle requests that are
legitimate. This is achieved by looking for the CM Service Accept
or the BSSAP CIPHER MODE COMMAND.
libosmogsm is a new library that is distributed in the libosmocore.
Now, openbsc depends on it. This patch gets openbsc with this
change.
This patch also rewrites all include path to the new
osmocom/[gsm|core]
Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
This change is required to finish the integration of the VTY and
the per-application logging categories that provides:
"vty: integration with logging framework"
in libosmocore.
It has been tested with osmo-nitb. The other just compiled tested.
Holger Hans Peter Freyther
Harald Welte