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Add helper functions for ACC bit flags in rach control IE. 

Add inline functions to manipulate and query ACC flag bits
in the rach_control.t2 and rach_control.t3 octets.
These function definitions also serve as documentation of
the purpose of rach_control.t2/t3.

Change-Id: I8f0a65c2980f86eb5c43f3bebe727f4d4d973163
Related: OS#2591
This commit is contained in:
Stefan Sperling 2018-02-06 13:20:23 +01:00
parent 554780836f
commit 1859515c69
1 changed files with 43 additions and 2 deletions
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45
include/osmocom/gsm/protocol/gsm_04_08.h
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@ -460,10 +460,51 @@ struct gsm48_rach_control {
cell_bar :1,
tx_integer :4,
max_trans :2;
uint8_t t2;
uint8_t t3;
uint8_t t2; /* ACC 8-15 barred flags */
uint8_t t3; /* ACC 0-7 barred flags */
} __attribute__ ((packed));
/*
* Mark an Access Control Class as barred.
* \param[in] rach_control A Rach Control Information Element.
* \param[in] acc Access Control Class number (0 - 15) which shall be barred.
*/
static inline void gsm48_barr_acc(struct gsm48_rach_control *rach_control, unsigned int acc)
{
OSMO_ASSERT(acc >= 0 && acc <= 15);
if (acc >= 8)
rach_control->t2 |= (1 << (acc - 8));
else
rach_control->t3 |= (1 << (acc));
}
/*
* Mark an Access Control Class as allowed.
* \param[in] rach_control A Rach Control Information Element.
* \param[in] acc Access Control Class number (0 - 15) which shall be allowed.
*/
static inline void gsm48_allow_acc(struct gsm48_rach_control *rach_control, unsigned int acc)
{
OSMO_ASSERT(acc >= 0 && acc <= 15);
if (acc >= 8)
rach_control->t2 &= ~(1 << (acc - 8));
else
rach_control->t3 &= ~(1 << (acc));
}
/*
* Indicate whether an Access Control Class is barred.
* \param[in] rach_control A Rach Control Information Element.
* \param[in] acc Access Control Class number (0 - 15).
* \returns true if the Access Control class is barred, false otherwise
*/
static inline bool gsm48_acc_is_barred(struct gsm48_rach_control *rach_control, unsigned int acc)
{
OSMO_ASSERT(acc >= 0 && acc <= 15);
if (acc >= 8)
return (rach_control->t2 & (1 << (acc - 8))) != 0;
return (rach_control->t3 & (1 << (acc))) != 0;
}
/* Chapter 10.5.2.30 */
struct gsm48_req_ref {