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gsm0808_utils: Fix gsm0808_cause_class() function 

Cause class is in bits 5-7 of the cause value.
For the cause value 0x52 old version returned 0xa instead of
a correct 0x5.

See section 3.2.2.5 Cause of TS 08.08 for the details.

Change-Id: I46646740c5daaafe20123e709f26dd1d2c1b6f8d
This commit is contained in:
Alexander Chemeris 2020-05-13 00:39:15 +03:00
parent fdfe25b105
commit ecfb0d68d7
1 changed files with 1 additions and 1 deletions
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2
include/osmocom/gsm/gsm0808_utils.h
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@ -145,7 +145,7 @@ int gsm48_mr_cfg_from_gsm0808_sc_cfg(struct gsm48_multi_rate_conf *cfg, uint16_t
/*! \returns 3GPP TS 08.08 §3.2.2.5 Class of a given Cause */
static inline enum gsm0808_cause_class gsm0808_cause_class(enum gsm0808_cause cause)
{
return (cause << 1) >> 4;
return (cause >> 4) & 0x7;
}
/*! \returns true if 3GPP TS 08.08 §3.2.2.5 Class has extended bit set */