/* GSM 04.18 ETSI TS 101 503 V8.27.0 (2006-05)
<SI6 rest octets> ::=
{L | H <PCH and NCH info>}
{L | H <VBS/VGCS options : bit(2)>}
{ < DTM_support : bit == L > I < DTM_support : bit == H >
< RAC : bit (8) >
< MAX_LAPDm : bit (3) > }
< Band indicator >
{ L | H < GPRS_MS_TXPWR_MAX_CCH : bit (5) > }
<implicit spare >;
*/
int rest_octets_si6(uint8_t *data, bool is1800_net)
{
struct bitvec bv;
memset(&bv, 0, sizeof(bv));
bv.data = data;
bv.data_len = 1;
/* no PCH/NCH info */
bitvec_set_bit(&bv, L);
/* no VBS/VGCS options */
bitvec_set_bit(&bv, L);
/* no DTM_support */
bitvec_set_bit(&bv, L);
/* band indicator */
if (is1800_net)
bitvec_set_bit(&bv, L);
else
bitvec_set_bit(&bv, H);
/* no GPRS_MS_TXPWR_MAX_CCH */
bitvec_set_bit(&bv, L);
bitvec_spare_padding(&bv, (bv.data_len * 8) - 1);
return bv.data_len;
}
static inline void test_spare(struct bitvec *bv, unsigned n)
{
bitvec_to_string_r(bv, lol);
unsigned bvlen = bv->cur_bit;
int sp = bitvec_spare_padding(bv, n);
printf("%c> SPARE %s [%d] -%d-> [%d]:\n", bit_value_to_char(L), lol, bvlen, n, sp);
bitvec_to_string_r(bv, lol);
printf(" %s [%d]\n\n", lol, bv->cur_bit);
}
/* Generate SI3 Rest Octests (Chapter 10.5.2.34 / Table 10.4.72) */
int rest_octets_si3(uint8_t *data, const struct gsm48_si_ro_info *si3)
{
struct bitvec bv;
memset(&bv, 0, sizeof(bv));
bv.data = data;
bv.data_len = 4;
/* Optional Selection Parameters */
append_selection_params(&bv, &si3->selection_params);
/* Optional Power Offset */
append_power_offset(&bv, &si3->power_offset);
/* Do we have a SI2ter on the BCCH? */
if (si3->si2ter_indicator)
bitvec_set_bit(&bv, H);
else
bitvec_set_bit(&bv, L);
/* Early Classmark Sending Control */
if (si3->early_cm_ctrl)
bitvec_set_bit(&bv, H);
else
bitvec_set_bit(&bv, L);
/* Do we have a SI Type 9 on the BCCH? */
if (si3->scheduling.present) {
bitvec_set_bit(&bv, H);
bitvec_set_uint(&bv, si3->scheduling.where, 3);
} else
bitvec_set_bit(&bv, L);
/* GPRS Indicator */
append_gprs_ind(&bv, &si3->gprs_ind);
/* 3G Early Classmark Sending Restriction. If H, then controlled by
* early_cm_ctrl above */
if (si3->early_cm_restrict_3g)
bitvec_set_bit(&bv, L);
else
bitvec_set_bit(&bv, H);
if (si3->si2quater_indicator) {
bitvec_set_bit(&bv, H); /* indicator struct present */
bitvec_set_uint(&bv, 0, 1); /* message is sent on BCCH Norm */
}
bitvec_spare_padding(&bv, (bv.data_len*8)-1);
return bv.data_len;
}
/* generate SI1 rest octets */
int rest_octets_si1(uint8_t *data, uint8_t *nch_pos)
{
struct bitvec bv;
memset(&bv, 0, sizeof(bv));
bv.data = data;
bv.data_len = 1;
if (nch_pos) {
bitvec_set_bit(&bv, H);
bitvec_set_uint(&bv, *nch_pos, 5);
} else
bitvec_set_bit(&bv, L);
bitvec_spare_padding(&bv, 7);
return bv.data_len;
}
/* Generate SI13 Rest Octests (04.08 Chapter 10.5.2.37b) */
int rest_octets_si13(uint8_t *data, const struct gsm48_si13_info *si13)
{
struct bitvec bv;
memset(&bv, 0, sizeof(bv));
bv.data = data;
bv.data_len = 20;
if (0) {
/* No rest octets */
bitvec_set_bit(&bv, L);
} else {
bitvec_set_bit(&bv, H);
bitvec_set_uint(&bv, si13->bcch_change_mark, 3);
bitvec_set_uint(&bv, si13->si_change_field, 4);
if (1) {
bitvec_set_bit(&bv, 0);
} else {
bitvec_set_bit(&bv, 1);
bitvec_set_uint(&bv, si13->bcch_change_mark, 2);
append_gprs_mobile_alloc(&bv);
}
/* PBCCH not present in cell:
it shall never be indicated according to 3GPP TS 44.018 Table 10.5.2.37b.1 */
bitvec_set_bit(&bv, 0);
bitvec_set_uint(&bv, si13->rac, 8);
bitvec_set_bit(&bv, si13->spgc_ccch_sup);
bitvec_set_uint(&bv, si13->prio_acc_thr, 3);
bitvec_set_uint(&bv, si13->net_ctrl_ord, 2);
append_gprs_cell_opt(&bv, &si13->cell_opts);
append_gprs_pwr_ctrl_pars(&bv, &si13->pwr_ctrl_pars);
/* 3GPP TS 44.018 Release 6 / 10.5.2.37b */
bitvec_set_bit(&bv, H); /* added Release 99 */
/* claim our SGSN is compatible with Release 99, as EDGE and EGPRS
* was only added in this Release */
bitvec_set_bit(&bv, 1);
}
bitvec_spare_padding(&bv, (bv.data_len*8)-1);
return bv.data_len;
}
/* generate SI2quater rest octets: 3GPP TS 44.018 § 10.5.2.33b */
int rest_octets_si2quater(uint8_t *data, struct gsm_bts *bts)
{
int rc;
struct bitvec bv;
if (bts->si2q_count < bts->si2q_index)
return -EINVAL;
bv.data = data;
bv.data_len = 20;
bitvec_zero(&bv);
/* BA_IND: Set to '0' as that's what we use for SI2xxx type,
* whereas '1' is used for SI5xxx type messages. The point here
* is to be able to correlate whether a given MS measurement
* report was using the neighbor cells advertised in SI2 or in
* SI5, as those two could very well be different */
bitvec_set_bit(&bv, 0);
/* 3G_BA_IND */
bitvec_set_bit(&bv, 1);
/* MP_CHANGE_MARK */
bitvec_set_bit(&bv, 0);
/* SI2quater_INDEX */
bitvec_set_uint(&bv, bts->si2q_index, 4);
/* SI2quater_COUNT */
bitvec_set_uint(&bv, bts->si2q_count, 4);
/* No Measurement_Parameters Description */
bitvec_set_bit(&bv, 0);
/* No GPRS_Real Time Difference Description */
bitvec_set_bit(&bv, 0);
/* No GPRS_BSIC Description */
bitvec_set_bit(&bv, 0);
/* No GPRS_REPORT PRIORITY Description */
bitvec_set_bit(&bv, 0);
/* No GPRS_MEASUREMENT_Parameters Description */
bitvec_set_bit(&bv, 0);
/* No NC Measurement Parameters */
bitvec_set_bit(&bv, 0);
/* No extension (length) */
bitvec_set_bit(&bv, 0);
rc = SI2Q_MAX_LEN - (bv.cur_bit + 3);
if (rc > 0 && bts->si_common.uarfcn_length - bts->u_offset > 0) {
rc = append_uarfcns(&bv, bts, rc);
if (rc < 0) {
LOGP(DRR, LOGL_ERROR, "SI2quater [%u/%u]: failed to append %zu UARFCNs due to range encoding "
"failure: %s\n",
bts->si2q_index, bts->si2q_count, bts->si_common.uarfcn_length, strerror(-rc));
return rc;
}
} else /* No 3G Neighbour Cell Description */
bitvec_set_bit(&bv, 0);
/* No 3G Measurement Parameters Description */
bitvec_set_bit(&bv, 0);
/* No GPRS_3G_MEASUREMENT Parameters Descr. */
bitvec_set_bit(&bv, 0);
rc = SI2Q_MAX_LEN - bv.cur_bit;
if (rc > 0 && si2q_earfcn_count(&bts->si_common.si2quater_neigh_list) - bts->e_offset > 0)
append_earfcn(&bv, bts, rc);
else /* No Additions in Rel-5: */
bitvec_set_bit(&bv, L);
bitvec_spare_padding(&bv, (bv.data_len * 8) - 1);
return bv.data_len;
}
/* Generate SI13 Rest Octests (04.08 Chapter 10.5.2.37b) */
int rest_octets_si13(uint8_t *data, const struct gsm48_si13_info *si13)
{
struct bitvec bv;
memset(&bv, 0, sizeof(bv));
bv.data = data;
bv.data_len = 20;
if (0) {
/* No rest octets */
bitvec_set_bit(&bv, L);
} else {
bitvec_set_bit(&bv, H);
bitvec_set_uint(&bv, si13->bcch_change_mark, 3);
bitvec_set_uint(&bv, si13->si_change_field, 4);
if (1) {
bitvec_set_bit(&bv, 0);
} else {
bitvec_set_bit(&bv, 1);
bitvec_set_uint(&bv, si13->bcch_change_mark, 2);
append_gprs_mobile_alloc(&bv);
}
if (!si13->pbcch_present) {
/* PBCCH not present in cell */
bitvec_set_bit(&bv, 0);
bitvec_set_uint(&bv, si13->no_pbcch.rac, 8);
bitvec_set_bit(&bv, si13->no_pbcch.spgc_ccch_sup);
bitvec_set_uint(&bv, si13->no_pbcch.prio_acc_thr, 3);
bitvec_set_uint(&bv, si13->no_pbcch.net_ctrl_ord, 2);
append_gprs_cell_opt(&bv, &si13->cell_opts);
append_gprs_pwr_ctrl_pars(&bv, &si13->pwr_ctrl_pars);
} else {
/* PBCCH present in cell */
bitvec_set_bit(&bv, 1);
bitvec_set_uint(&bv, si13->pbcch.psi1_rep_per, 4);
/* PBCCH Descripiton */
bitvec_set_uint(&bv, si13->pbcch.pb, 4);
bitvec_set_uint(&bv, si13->pbcch.tsc, 3);
bitvec_set_uint(&bv, si13->pbcch.tn, 3);
switch (si13->pbcch.carrier_type) {
case PBCCH_BCCH:
bitvec_set_bit(&bv, 0);
bitvec_set_bit(&bv, 0);
break;
case PBCCH_ARFCN:
bitvec_set_bit(&bv, 0);
bitvec_set_bit(&bv, 1);
bitvec_set_uint(&bv, si13->pbcch.arfcn, 10);
break;
case PBCCH_MAIO:
bitvec_set_bit(&bv, 1);
bitvec_set_uint(&bv, si13->pbcch.maio, 6);
break;
}
}
/* 3GPP TS 44.018 Release 6 / 10.5.2.37b */
bitvec_set_bit(&bv, H); /* added Release 99 */
/* claim our SGSN is compatible with Release 99, as EDGE and EGPRS
* was only added in this Release */
bitvec_set_bit(&bv, 1);
}
bitvec_spare_padding(&bv, (bv.data_len*8)-1);
return bv.data_len;
}
