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MGCP is used over UDP and a response might be lost. The MGCP RFC
asks for keeping a list of responses and then using the previous
response to answer a duplicate request. I tried to conserve memory
and just wanted to remember the last transaction identifier and
result-code and re-generate the result from that. This made the
code look bad and this is why the entire response will now be stored.
It sadly increases the memory usage but can not be avoided at this
time.
Remove the msg->l3h pointer for the RQNT callback as strtok has
modified the content of it.
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Attempt to detect a response and return only then. Remove one level
of tabls in preparation for the re-transmission handling.
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This is required for remembering the last result in a central place
and is required to properly implement detection of re-transmissions.
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The second CRCX would be mostly ignored and be handled by the
retransmission layer of MGCP.
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Simplify the code and remove null check for the two strings.
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Make sure to accept the phone first before sending the USSD message.
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MT-SMS:
Manual test with VTY to phone. Also multiple SMS deliveries on
the same lchan. Manual test with phone to phone.
MO-SMS:
Manual test with phone to phone but only a single SMS at a time,
not testing the special 'CP-ACK' case.
Forced CP timeout using the fakebts SMSTest, not causing a crash.
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For GSM (not GPRS) we will never use a SAPI!=3. Simplify the code
and remove the link_id=0.
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Rebased, tested and fixed by Holger Freyther. Release the transaction
only once the SMC is asking for the release and set the cb's to NULL
to catch a use after free early.
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This has been rebased and fixed by Holger Freyther. The change of
the debug area was split out in a previous commit and the is_mt was
put back into the transaction code.
The transaction is now freed from the RELEASE_REQ sent by the SMC
layer and not inside the error path. When clearing the SMC instance
we also clear the callbacks.
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This should and does happen as part of the trans_free/msc_release_connection
code. There is no easy way to determine that the lchan is now 'free' for other
things.. Let the transaction code sort this out. This code just needs to make
sure that transactions are always freed.
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This is more a work around and one still needs to implement a
proper dispatch on the opening of the connection. If there is no
operation left, no transaction and no silent call, close down the
channel.
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Introduce a callback for the request and forward the signalrequest
to the callback. This is not a full implementation of MGCP RQNT.
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... I would have never believed it is such a broken mindfuck.
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This program binds as ESME transceiver to a SMSC and simply mirrors back
all SMS that it receives.
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Each ESME can have a number of prefix-matching routes, or it can
be a 'default route' to whcih all otherwise unknown SMS destinations
are routed.
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Use the code that is shipped inside the libosmogsm library. Right now
the signature (besides the static) and the implementation is the same.
This makes using the libosmogsm SMC code more easy in the near future.
For the gsm340_gen_oa we are now using a small wrapper to generate the
proper type and numbering plan.
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subscr_get_by_* is already increasing the refcount, we shouldn't
do that a second time (thanks, Holger).
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For some reason, libsmpp34 is too smart to zero out the entire structure
to which it is unpacking. This introduces an ugly wrapper macro to
work around. This needs discussion with the libsmpp34 maintainer.
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In case a ESME disappears after SUBMIT-SM but before the MT-SMS
is delivered (transaction mode), we have to make sure the esme
structure still exists.
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WARNING: if the ESME disconnects, osmo_esme gets freed, and
sms->smpp.esme might point to invalid/unallocated memory!
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The log statement is split into two because inet_ntoa works on an
internal buffer and would print the last address twice.
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Move to the control command handling out of the main file into
a dedicated module. There are still some calls embedded into the
main code but it will be moved soon.
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Use a usec timestamp for the local time. The seconds to usec will
swap over to the lower bits but this appears to be correct. The
CLOCK_MONOTONIC is used to fulfill the RFC 3550 requirement even
if it is a bit slower than the gettimeofday.
Make sure to initialize transit in a way that the first transit
time will be 0. Otherwise the jitter will contain the difference
of the localtime and the remote time.
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Calculate the expected packages and packet loss as of RFC 3550.
The values should be clamped but our packet loss counter is 32
bits and not 24 and we should clamp at other values but I am
waiting for some issues first before dealing with that.
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This is missing the probation and the dealing with a remote
restart. For the remote restart we will simply write a log
statement as this is unlikely to happen during a call or if
it does happen the call will be taken down by the BSC anyway.
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Explain why this code deals with only one source and that this is
a limit of some equipment (e.g. the nanoBTS).
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Align the naming inside the mgcp_rtp_state with the naming inside
the 'source' struct of the appendix. Make first_seq_no/base_seq
a uint16_t. This is removing rules for alignments and reduces the
struct from 40 bytes to 36.
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Follow the MGCP specification and send the collected statistics
at the end of a call. Right now this does not include jitter, packet
loss and delay.
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