Send a RLSD down to the BSC in case the USSD Provider is gone. It
is not sending a Clear Command and ut depends if the BS+ will
like this kind of behavior. At least the data on the NAT will
be freed soon afterwards due the RLC message.
Extract the IMSI from the first message as well and safe it
in the connection structure. The problem is that we do not
have this structure at this point, so we will allocate the
imsi as child of the bsc_connection and then move/steal it.
Rename NAT_IPAC_PROTO_MGCP to IPAC_PROTO_MGCP and place it in
the enum. We need to be prepared to change this number if IPA
is ever going to use it for something else.
Make it possible that one BSC is serving multiple
cells. Introduce a list of lacs, add functions to
manipulate the lists. The current test cases for
paging by lac continue to work.
The filter code will return < 0 for error, 0 for unknown
subscriber, 1 for subscriber checked. Use the same if construct
as for the CR message. This should fix passing LU when it
starts with a TMSI of a different network.
When we reject the IMSI we do not have the msc_con set on the
SCCP connection, but we do have a remote_ref. So the nat_send_rlsd
will end up with a crash due the msc_con being zero. Fix the
crash by only sending a released to the MSC when the connection
is not local.
This way we avoid seeing many warnings that we will not forward
data to the MSC. For the con_local connections that is actually
the idea, we will not forward them to the MSC.
Attempt to disconnect the connection and make both sides happy
about this. Right now it only handles the LU and should be extended
to the CM Service Request.
Return early in case the IMSI was already checked, if not we need
to look at the connection and check if the message could contain a
imsi we want/need to filter.
Return -1 if the IMSI should be filtered, 0 if the IMSI could not
be checked and 1 if the IMSI was checked and allowed to pass. In
the future this will be used to inspect every message coming by.
This uses the osmo_daemonize() function of libosmocore >= 0.1.18,
and is now implemented for bac_nat, osmo-bsc, bsc_hack, osmo-gbproxy
and bsc_mgcp. This means only osmo-sgsn is missing, which currently
has no option parsing at all.
common_vty.c was including bsc_nat.h which tried to
get the sccp/sccp_types.h which is not required to be
installed. Move all structs using/embedding SCCP structures
into the bsc_nat_sccp.h and include. This should fix
the compilation.
Add --enable-nat and --enable-osmo-bsc to build applications
requiring the Osmo SCCP library to be installed. We are not
using autodiscover as this is out of fashion.
* Return msg'es to the right MSC Con. Right now it is nat->msc_con.
* When forwarding from BSC to MSC, use the msc_con inside the
sccp_connections. This means we will only forward data with a
connection to the BSC.
Holger Hans Peter Freyther
Harald Welte