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When setting a new MSC timeslot to a SCCP connection check if
any of the existing connections have this timeslot, if so we will
send a DLCX down the stream to make sure it is closed there, when
we will CRCX this new timeslot we will happily reallocate it.
When the SCCP connection goes away, or we get a DLCX from the
network, or the BSC is gone we will send a DLCX message down the
stream as well.
When we receive a CRCX from the network we will forward the CRCX
as usual and send a dummy MDCX after it.
For the DLCX and the dummy MDCX we send a custom MGCP message
that will not provoke an answer. Even if the downstream MGCP GW
will answer we will ignore it due the dummy transaction id that
is not used anywhere else.
This change should make sure that we close the dowstream endpoint
all the time, even when the DLCX arrives after the SCCP connection
is torndown.
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This is required for unit tests that want to queue messages
and see if we can provoke a memleak.
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We do not want to handle this identity. If we can not page by
lac there is no need to page anything else.
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Always initialize the pointer to a invalid value in case
we encounter a parsing error or such.
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The address can still be specified on the cli and it will
overwrite the config in the config file.
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Add new BSCs to the tail so we keep the sort order when writing
them out to the vty, fix the LAC command.
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Count number of SCCP connections, number of BSC reconnects,
number of calls. For most of them we have a per BSC and a
global count.
Right now all structs using the counters survive until the
end of the application so we do not need to free them.
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This method currently prepends the IPA header and sends
the data. In the future we might be able to use SCTP for
it.
We have to remove the IPA header from the static messages
for that to work.
This code is untested.
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This allows that we can print the Nr. next to the lac
and it allows us to change the lac at runtime without
reconnecting the BSC.
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The value might be a non printable one.
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* Forward a rewritten msg to the BSS. We change the IP and port
to point to the NAT instead of the core network. We also keep
track of the BSC and the transacition id.
* Handle the case where we have not found a SCCP connection and
need to send a response ourselves.
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This information will be needed when we are trying to forward
MGCP connections to and from the BSC through the IPA protocol.
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Moving it here means we can more easily test this code, there is one
behaviour change with the code that we only support paging messages
with one LAC and will silently ignore the others.
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This way one can create the bsc_nat structure in unit tests..
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