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This is required for osmo-bsc to parse Alcatel S-12 CIPHER MODE COMMAND
in osmo-bsc.
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lapdm.c takes the re-establishment message and forwards it to lapd_core.c,
so we can assume that msgb is set at primitive. In case there is data in
the re-establishment msg, it is moved into send_buffer. In case of no
data (0 length), it must be freed.
Fixes an issue spotted by Coverity Scan.
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This reverts commit f996b05dbddccb8e8788dd69777a4fedfa2373eb
and 2b0cac4ef83137ee0bdd583aee877eac467abeab. A detailed
explanation can be found here:
http://lists.osmocom.org/pipermail/openbsc/2013-July/004737.html
The short description is that:
1.) The API should return (as out parameter) the number of
octets used.
2.) The handling for the <CR> encoding only applies to USSD
and it is incomplete. On top of that it broke the SMS test.
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For whatever reason two functions were present twice in the code,
probably some git merge/rebase artefact?
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this causes compiler warnings in user code ever since commit
55cf02221f0654a3f48888f3b13766b671a120f0
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To avoid the situation where the receiving entity confuses 7 binary zero pad
bits as the @ character, the carriage return or <CR> character shall be used
for padding in this situation.
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It is used to transfer PHYSICAL INFORMATION message to the MS.
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If the datalink fails or if handover or assignment to a new channel fails,
it is re-establised by sending SABM again. The length of establish message
is 0 in this case. The length is used to differentiate between
re-establishment and contention resolution, which has to be handled
differently.
See TS 04.06 Chapter 5.4.2.1
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The chan_nr is required to locate timeslot and subslot of access bursts
during handover procedure.
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In order to control layer 1 via primitives, MPH primitives are required.
There is only one (MPH-INFO) primitive defined in TS 04.04 for all control
and measurement functions. A type identifier inside this primitive is used
to differentiate between different functions.
The TCH primitives are used to carry traffic. TCH primitives carry voice
or data traffic, whereas PH-DATA primitives carry FACCH data.
PH_RTS and TCH_RTS (ready-to-send) primitives are used to poll requests
from upper layers.
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It is impossible that the snprintf will fill the entire namebuf
but just follow the idiom to make sure it is null terminated.
Related: Coverity CID 1040676
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These routines were not freeing vectors used for the lookup. On
review it is fixing another path not detected by coverity.
The danger is a double free in tab completion now. It is difficult
to test this.
Fixes: Coverity CID 23037, CID 23038
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The &buf[3] is unlikely to be aligned properly. Use memcpy instead
of an assignment. Add a small testcase that verifies that I didn't
mess up the conversion.
Alignment trap: osmo-nitb (3293) PC=0x492b7094 Instr=0xe5803003 Address=0xbeb259db FSR 0x801
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This already came up during review but now that Coverity complains
about it as well, let us just remove it. The variable is unsigned
so it can never be < 0.
Fixes: Coverity CID 1040669.
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The modified macro is still working on a gcc 4.7 and gcc 4.8 after the
removal of the typedef and addition of the unused attribute.
include/osmocom/core/msgb.h: In function ‘msgb_alloc_headroom’:
include/osmocom/core/utils.h:40:51: warning: typedef ‘dummyheadroom_bigger’ locally defined but not used [-Wunused-local-typedefs]
#define osmo_static_assert(exp, name) typedef int dummy##name [(exp) ? 1 : -1];
^
include/osmocom/core/msgb.h:386:2: note: in expansion of macro ‘osmo_static_assert’
osmo_static_assert(size > headroom, headroom_bigger);
^
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If the BTS tells us to not send any data at all anymore (bucket leak
rate of 0 bits per second), then we should respect this and not run into
a divide-by-zero. However, as this indicates complete overload, we
print a log message to that regard.
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On Ubuntu 13.04 the build was failing on the OBS with:
/usr/bin/ld: fr_test.o: undefined reference to symbol 'dlsym@@GLIBC_2.2.5'
/usr/bin/ld: note: 'dlsym@@GLIBC_2.2.5' is defined in DSO /lib/x86_64-linux-gnu/libdl.so.2 so try adding it to the linker command line
/lib/x86_64-linux-gnu/libdl.so.2: could not read symbols: Invalid operation
collect2: error: ld returned 1 exit status
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Update the OSMO_ASSERT to what it should be like but can't due a
known issue in the LAPDm code.
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The issue about the wrong padding has been found when creating the
testcase in commit 15f740caa3a1ef681b3a5564daf6dfccb7b1e489 but the
patch to fix that was never proposed by inclusion by its author.
The issue about about the establish confirm carrying data with
a wrong size is still present.
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When a SABM(E) frame arrives, we have to trim the L2 padding (0x2b for
gsm) before handing the data off to L3, just like we do with I frames.
Also, we should use mggb_trim() or even msgb_l3trim() instead of
manually fiddling with msgb->length and ->tail pointers.
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Since automake 1.13 INCLUDES is depricates and causes a warning
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Make detecting use after free of the tx_hist easy and set the
variable to NULL after talloc_free has been freed.
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This is a fatal error when building RPMs for OpenSUSE.
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* Squashed fix and testcase into one.
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After reception of SABM, the network responds with UA and enters the
establised multiframe state. If UA is not received by mobile, the SABM
is transmitted again, and the network must respond with UA again, unless
it is from a different mobile.
Add LAPDm collision test (contention resolution on network side).
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Allow to tag the NS service with a custom DSCP.
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This is changing the semantic of the assert. The regression tests
now either need to check the stderr result, the exit status or print
a message when all tests are completed.
This is not that bad as the osmo_generate_backtrace is printing to
the stdout right now.
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This reverts commit a6428d2376034d619f342897d3ce415b3f9a3584.
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This reverts commit cd6ed82d1ff48f47ad9e33e6322df62896a76ed5.
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This function will re-open all existing log files in the application,
praticularly useful for SIGHUP handlers in case of logrotate
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