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The diff between this and master will probably need a lot of review and fixes.
The current state does compile, but I expect pretty much everything to be
broken now. Future development will reinstate proper functionality piecemeal.
The first goal is to get basic signalling to work, then SMS. The voice control
(RTP) is completely disabled now (see "#if BEFORE_MSCSPLIT") and will be fixed
last AFAICT.
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The idea of "subscriber_get_channel" was that different
requests would be coordinated. At the same time we have
seen that the "queue" can get stuck at both 31C3 and the
rhizomatica installations.
Voice calls and SMS do not need coordination. We should
be able to send SMS on a voice channel and switch the MS
from a SDCCH to a TCH in case we establish a voice call.
The SMS code itself needs to coordinate to obey the limit
of one SMS per direction but this should be enforced in
the sms layer and not on the subscriber.
Modify the code to have a simple paging coordination. The
subscriber code will schedule the paging and register who
would like to know about success/failure.
This allowed to greatly simplify the paging response
handling for the transaction code (and in fact we could
move the transaction list into the subscriber structure
now). The code gained to support to cancel the notification
of a request (but not the paging itself yet).
TODO: Cancel paging request in case no one cares about it
anymore.
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The trans_alloc function still uses the subscr object to access the
network object.
This patch adds an explicit net parameter to this function and
removes the access to subscr to obtain it.
Sponsored-by: On-Waves ehf
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Currently every subcriber object directly refers to the gsm_network
which contains a flag shared by every related subscriber
(keep_subscr). This adds a dependency on gsm_network even if only the
function defined in gsm_subscriber_base.c are used.
This patch adds a new struct gsm_subscriber_group which contains the
keep_subscr flag and a back reference to the network object. The
latter is not dereferenced in gsm_subscriber_base.c, so it can safely
be set to NULL when only that part of the gsm_subscriber API is being
used. It also changes that API to use gsm_subscriber_group instead of
gsm_network parameters.
Since there are some places where a pointer to the gsm_network is
needed but where only a gsm_subscriber is available, a 'net' back
pointer is added to the group struct, too. Nevertheless subscr group
and network could be separated completely, but this is not the topic
of this commit.
Sponsored-by: On-Waves ehf
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Sponsored-by: On-Waves ehf
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Currently the net pointer is obtained from trans->subscr->net. On the
other hand, the list gsm_trans object is managed by the net object.
This patch adds the back pointer to the structure and replaces all
trans->subscr->net by trans->net expressions. In trans_alloc() the
trans->net pointer is obtained from the subscr object.
Sponsored-by: On-Waves ehf
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Make finding use-after-free more easy and set it to NULL.
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This is a cosmetic change and should happen to find use after free
of the subscriber.
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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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The BSC code does not use transactions, move it to the libmsc.
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