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This patch adds RB-tree based timers which scales better than the
previous list-based implementation.
It does not require any API changes. It breaks ABI because the
osmo_timer_list structure has changed though (to avoid this in
the future, we can put internal data in some private structure).
The following table summarizes the worst-case computational complexity
of this new implementation versus the previous one:
rb-tree list-based
------- ----------
calculate next timer to expire O(1) O(n)
insertion of new timer O(log n) O(n)
deletion of timer O(log n) O(1)
timer-fired scheduler O(log n) O(3n)
The most repeated cases are:
* the calculation of the next timer to expire, that happens in every
loop of our select function.
* the timer-fired scheduler execution.
This new implementation only loses in the deletion of timer scenario,
this happens because we may need to rebalance the tree after the
removal.
So I think there is some real gain if we have some situation in which
we have to handle lots of timers.
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This patch adds red black trees implementation to libosmocore.
This data structure is very useful to search for elements in
ordered sets in O(log n) instead of O(n) that lists provide.
The first client of this code will be one follow up patch that
implements rbtree-based timer scheduler.
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Instead of mixing together the GSM layer 1 interface and RSL interface
with the implementation of LAPD, the core function of LAPD is now
extracted from LAPDm. The core implementation is now in lapd_core.c
and lapd_core.h respectively.
The lapd_core.c implements exactly one datalink instance for one SAP.
The surrounding implementation "lapdm.c" codes/decodes the layer 2
headers and handles multiplexing and datalink instances, as well as
translates primitives from/to RSL layer.
lapd_core.c can now be used for other LAPD implementations. (ISDN/ABIS)
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Document all facilities in the log syslog command.
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There are no other commands on the set, log and mask level,
create a simple set-log-mask command and deprecate the old
way.
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Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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Thanks to Richard James <xyzzy@mm.st> for the patch
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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From: iZsh <izsh@fail0verflow.com>
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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As it turns out, the other range were affected too, so Anreas wrote
the fix for them as well.
Written-by: Andreas.Eversberg <jolly@eversberg.eu>
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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From the mail:
---
appended is another patch for fixing a bug in the calculation of the
frequency lists. This time the patch is for the "Range 256 format".
The problem is that the operand for the "smod" operation might be
negative, in this case the simplified version won't work as expected.
In the patch I introduced a separate function for "smod" which takes
care of the sign. I have not yet checked if the other formats are also
affected, this would be the case if the "smod" operand can be negative.
There might be other solutions to fix the problem without the need
for a separate function, however I have not thought further about it.
A test vector is the following frequency list ("Range 256 format",
first byte is the length):
09 8b 1c 83 8c 15 ef 02 2d 30
The correct ARFCNs are
569 571 576 578 586 608 712 715 719
The uncorrected version would instead return:
444 457 460 464 569 576 578 586 608
This means four ARFCNs are wrong which will cause problems if for
example the frequency list contains the ARFCNs for hopping.
----
Written-by: Dieter Spaar <spaar@mirider.augusta.de>
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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Sometimes we need stuff like reversing every bit in each byte (but not
the byte-order).
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Without this patch, `-d DMI' enables logging for DMI and DMIB.
Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
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Fix-by: Andreas.Eversberg <jolly@eversberg.eu>
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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Additionally it wasn't possible to send concatenated sms from the vty.
To send multiple sms, it is necessary to use padding bits and add a user_data_header.
Therefore the gsm_7bit_encode function was splitted to gsm_7bit_encode and gsm_septets2octets.
gsm_septets2octets: this is the old gsm_7bit_encode function + additional padding parameter
Additionally the gsm_7bit_decode function was modified to take account for the user_data_header.
With the new gsm_get_octet_len function you can get the octet length for a given septet length.
I also added several sms tests.
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They are not used anywhere in our libraries, so they should be defined
by the respective applications
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* All loging prefixes in libraries should be DL like DLINP
* All signals / subsystems should be called S_L_* SS_L_*
* All command nodes should be called L_*_NODE
This makes sure existinc code still compiles as expected
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This adds the libosmo-abis logging subsystems to libosmocore,
it uses the new change that harald proposed based on negative
numbers for library logging subsystems.
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detected by Smatch
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If we encounter a tag with 0xFF, we overflow our existing tlv_parse
array definitions.
Warning: this breaks ABI
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detected by Smatch
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