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Currently w[14]/w[15] and w[18]/w[19] are swapped in range 256 format
decoding in gsm48_decode_freq_list().
This patch fixes this.
Sponsored-by: On-Waves ehf
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Also adds a test case for both encoder and decoder of this IE
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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:
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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.
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Written-by: Dieter Spaar <spaar@mirider.augusta.de>
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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Fix-by: Andreas.Eversberg <jolly@eversberg.eu>
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
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This patch moves all GSM-specific definitions to include/osmocom/gsm.
Moreover, the headers in include/osmocore/ have been moved to
include/osmocom/core.
This has been proposed by Harald Welte and Sylvain Munaunt.
Tested with `make distcheck'.
Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
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libosmogsm which is provided by libosmocore.
I have also moved generate_backtrace() to backtrace.c instead
of gsm_utils.c, otherwise the timer and msgfile tests depend on
libosmogsm.
Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
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