diff options
| author | Max <msuraev@sysmocom.de> | 2016-04-15 16:04:04 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2016-04-16 13:41:56 +0200 |
| commit | fbb8bfa514284f9744809afba51dec716590090c (patch) | |
| tree | d66c5065eb4f5502e3a3511e378cb1d8a898a069 /src/gsm | |
| parent | da1b20cd4f7b13121434d32817886d7803fd6052 (diff) | |
Add function to get osmo_earfcn bit size
This function returns the number of bits necessary to pack osmo_earfcn
into Repeated E-UTRAN Neighbour Cells IE (3GPP TS 44.018 Table
10.5.2.33b.1).
Diffstat (limited to 'src/gsm')
| -rw-r--r-- | src/gsm/libosmogsm.map | 1 | ||||
| -rw-r--r-- | src/gsm/sysinfo.c | 24 |
2 files changed, 25 insertions, 0 deletions
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map index a3e4e146..6886a6c0 100644 --- a/src/gsm/libosmogsm.map +++ b/src/gsm/libosmogsm.map @@ -31,6 +31,7 @@ dbm2rxlev; osmo_earfcn_add; osmo_earfcn_del; +osmo_earfcn_bit_size; osmo_earfcn_init; gprs_cipher_gen_input_i; diff --git a/src/gsm/sysinfo.c b/src/gsm/sysinfo.c index 42e717fe..3ec54448 100644 --- a/src/gsm/sysinfo.c +++ b/src/gsm/sysinfo.c @@ -144,6 +144,30 @@ int osmo_earfcn_add(struct osmo_earfcn_si2q *e, uint16_t arfcn, uint8_t meas_bw) return -ENOMEM; } +/*! \brief Return number of bits necessary to represent earfcn struct as + * Repeated E-UTRAN Neighbour Cells IE from 3GPP TS 44.018 Table 10.5.2.33b.1 + * \param[in,out] e earfcn struct + * \returns number of bits + */ +size_t osmo_earfcn_bit_size(const struct osmo_earfcn_si2q *e) +{ + /* 1 stop bit + 5 bits for THRESH_E-UTRAN_high */ + size_t i, bits = 6; + for (i = 0; i < e->length; i++) { + if (e->arfcn[i] != OSMO_EARFCN_INVALID) { + bits += 17; + if (OSMO_EARFCN_MEAS_INVALID == e->meas_bw[i]) + bits++; + else + bits += 4; + } + } + bits += (e->prio_valid) ? 4 : 1; + bits += (e->thresh_lo_valid) ? 6 : 1; + bits += (e->qrxlm_valid) ? 6 : 1; + return bits; +} + /*! \brief Delete arfcn (and corresponding measurement bandwith) from earfcn * struct * \param[in,out] e earfcn struct |