/* Append single FDD UARFCN */
static inline int append_utran_fdd(struct bitvec *bv, uint16_t u, int *sc, size_t length)
{
uint8_t chan_list[16] = { 0 };
int f0 = f0_helper(sc, length, chan_list);
if (f0 < 0)
return f0;
/* Repeated UTRAN FDD Neighbour Cells */
bitvec_set_bit(bv, 1);
/* FDD-ARFCN */
bitvec_set_bit(bv, 0);
bitvec_set_uint(bv, u, 14);
/* FDD_Indic0: parameter value '0000000000' is a member of the set? */
bitvec_set_bit(bv, f0);
/* NR_OF_FDD_CELLS */
bitvec_set_uint(bv, length, 5);
f0 = bv->cur_bit;
bitvec_add_range1024(bv, (struct gsm48_range_1024 *)chan_list);
bv->cur_bit = f0 + range1024_p(length);
return 21 + range1024_p(length);
}
/* Append power offset to bitvec */
static void append_power_offset(struct bitvec *bv,
const struct gsm48_si_power_offset *po)
{
if (po->present) {
bitvec_set_bit(bv, H);
bitvec_set_uint(bv, po->power_offset, 2);
} else
bitvec_set_bit(bv, L);
}
/* Append GPRS indicator to bitvec */
static void append_gprs_ind(struct bitvec *bv,
const struct gsm48_si3_gprs_ind *gi)
{
if (gi->present) {
bitvec_set_bit(bv, H);
bitvec_set_uint(bv, gi->ra_colour, 3);
/* 0 == SI13 in BCCH Norm, 1 == SI13 sent on BCCH Ext */
bitvec_set_bit(bv, gi->si13_position);
} else
bitvec_set_bit(bv, L);
}
/* Append selection parameters to bitvec */
static void append_selection_params(struct bitvec *bv,
const struct gsm48_si_selection_params *sp)
{
if (sp->present) {
bitvec_set_bit(bv, H);
bitvec_set_bit(bv, sp->cbq);
bitvec_set_uint(bv, sp->cell_resel_off, 6);
bitvec_set_uint(bv, sp->temp_offs, 3);
bitvec_set_uint(bv, sp->penalty_time, 5);
} else
bitvec_set_bit(bv, L);
}
/* 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;
}
static inline void test_set(struct bitvec *bv, enum bit_value bit)
{
bitvec_to_string_r(bv, lol);
unsigned bvlen = bv->cur_bit;
int set = bitvec_set_bit(bv, bit);
printf("%c> SET %s [%d] ++> [%d]:\n", bit_value_to_char(bit), lol, bvlen, set);
bitvec_to_string_r(bv, lol);
printf(" %s [%d]\n\n", lol, bv->cur_bit);
}
/* pad all remaining bits up to num_bits */
int bitvec_spare_padding(struct bitvec *bv, unsigned int up_to_bit)
{
unsigned int i;
for (i = bv->cur_bit; i <= up_to_bit; i++)
bitvec_set_bit(bv, L);
return 0;
}
/* set multiple bits (based on array of bitvals) at current pos */
int bitvec_set_bits(struct bitvec *bv, enum bit_value *bits, int count)
{
int i, rc;
for (i = 0; i < count; i++) {
rc = bitvec_set_bit(bv, bits[i]);
if (rc)
return rc;
}
return 0;
}
/* Generate SI4 Rest Octets (Chapter 10.5.2.35) */
int rest_octets_si4(uint8_t *data, const struct gsm48_si_ro_info *si4, int len)
{
struct bitvec bv;
memset(&bv, 0, sizeof(bv));
bv.data = data;
bv.data_len = len;
/* SI4 Rest Octets O */
append_selection_params(&bv, &si4->selection_params);
append_power_offset(&bv, &si4->power_offset);
append_gprs_ind(&bv, &si4->gprs_ind);
if (0 /* FIXME */) {
/* H and SI4 Rest Octets S */
bitvec_set_bit(&bv, H);
/* LSA Parameters */
if (si4->lsa_params.present) {
bitvec_set_bit(&bv, H);
append_lsa_params(&bv, &si4->lsa_params);
} else
bitvec_set_bit(&bv, L);
/* Cell Identity */
if (1) {
bitvec_set_bit(&bv, H);
bitvec_set_uint(&bv, si4->cell_id, 16);
} else
bitvec_set_bit(&bv, L);
/* LSA ID Information */
if (0) {
bitvec_set_bit(&bv, H);
/* FIXME */
} else
bitvec_set_bit(&bv, L);
} else {
/* L and break indicator */
bitvec_set_bit(&bv, L);
bitvec_set_bit(&bv, si4->break_ind ? H : L);
}
return bv.data_len;
}
/* GPRS Mobile Allocation as per TS 04.60 Chapter 12.10a:
< GPRS Mobile Allocation IE > ::=
< HSN : bit (6) >
{ 0 | 1 < RFL number list : < RFL number list struct > > }
{ 0 < MA_LENGTH : bit (6) >
< MA_BITMAP: bit (val(MA_LENGTH) + 1) >
| 1 { 0 | 1 <ARFCN index list : < ARFCN index list struct > > } } ;
< RFL number list struct > :: =
< RFL_NUMBER : bit (4) >
{ 0 | 1 < RFL number list struct > } ;
< ARFCN index list struct > ::=
< ARFCN_INDEX : bit(6) >
{ 0 | 1 < ARFCN index list struct > } ;
*/
static int append_gprs_mobile_alloc(struct bitvec *bv)
{
/* Hopping Sequence Number */
bitvec_set_uint(bv, 0, 6);
if (0) {
/* We want to use a RFL number list */
bitvec_set_bit(bv, 1);
/* FIXME: RFL number list */
} else
bitvec_set_bit(bv, 0);
if (0) {
/* We want to use a MA_BITMAP */
bitvec_set_bit(bv, 0);
/* FIXME: MA_LENGTH, MA_BITMAP, ... */
} else {
bitvec_set_bit(bv, 1);
if (0) {
/* We want to provide an ARFCN index list */
bitvec_set_bit(bv, 1);
/* FIXME */
} else
bitvec_set_bit(bv, 0);
}
return 0;
}
/* 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;
}
/* set multiple bits (based on numeric value) at current pos */
int bitvec_set_uint(struct bitvec *bv, unsigned int ui, int num_bits)
{
int i, rc;
for (i = 0; i < num_bits; i++) {
int bit = 0;
if (ui & (1 << (num_bits - i - 1)))
bit = 1;
rc = bitvec_set_bit(bv, bit);
if (rc)
return rc;
}
return 0;
}
/* 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;
}
/* GPRS Cell Options as per TS 04.60 Chapter 12.24
< GPRS Cell Options IE > ::=
< NMO : bit(2) >
< T3168 : bit(3) >
< T3192 : bit(3) >
< DRX_TIMER_MAX: bit(3) >
< ACCESS_BURST_TYPE: bit >
< CONTROL_ACK_TYPE : bit >
< BS_CV_MAX: bit(4) >
{ 0 | 1 < PAN_DEC : bit(3) >
< PAN_INC : bit(3) >
< PAN_MAX : bit(3) >
{ 0 | 1 < Extension Length : bit(6) >
< bit (val(Extension Length) + 1
& { < Extension Information > ! { bit ** = <no string> } } ;
< Extension Information > ::=
{ 0 | 1 < EGPRS_PACKET_CHANNEL_REQUEST : bit >
< BEP_PERIOD : bit(4) > }
< PFC_FEATURE_MODE : bit >
< DTM_SUPPORT : bit >
<BSS_PAGING_COORDINATION: bit >
<spare bit > ** ;
*/
static int append_gprs_cell_opt(struct bitvec *bv,
const struct gprs_cell_options *gco)
{
int t3192, drx_timer_max;
t3192 = encode_t3192(gco->t3192);
if (t3192 < 0)
return t3192;
drx_timer_max = encode_drx_timer(gco->drx_timer_max);
if (drx_timer_max < 0)
return drx_timer_max;
bitvec_set_uint(bv, gco->nmo, 2);
/* See also 3GPP TS 44.060
Table 12.24.2: GPRS Cell Options information element details */
bitvec_set_uint(bv, gco->t3168 / 500 - 1, 3);
bitvec_set_uint(bv, t3192, 3);
bitvec_set_uint(bv, drx_timer_max, 3);
/* ACCESS_BURST_TYPE: Hard-code 8bit */
bitvec_set_bit(bv, 0);
/* CONTROL_ACK_TYPE: */
bitvec_set_bit(bv, gco->ctrl_ack_type_use_block);
bitvec_set_uint(bv, gco->bs_cv_max, 4);
if (0) {
/* hard-code no PAN_{DEC,INC,MAX} */
bitvec_set_bit(bv, 0);
} else {
/* copied from ip.access BSC protocol trace */
bitvec_set_bit(bv, 1);
bitvec_set_uint(bv, 1, 3); /* DEC */
bitvec_set_uint(bv, 1, 3); /* INC */
bitvec_set_uint(bv, 15, 3); /* MAX */
}
if (!gco->ext_info_present) {
/* no extension information */
bitvec_set_bit(bv, 0);
} else {
/* extension information */
bitvec_set_bit(bv, 1);
if (!gco->ext_info.egprs_supported) {
/* 6bit length of extension */
bitvec_set_uint(bv, (1 + 3)-1, 6);
/* EGPRS supported in the cell */
bitvec_set_bit(bv, 0);
} else {
/* 6bit length of extension */
bitvec_set_uint(bv, (1 + 5 + 3)-1, 6);
/* EGPRS supported in the cell */
bitvec_set_bit(bv, 1);
/* 1bit EGPRS PACKET CHANNEL REQUEST */
if (gco->supports_egprs_11bit_rach == 0) {
bitvec_set_bit(bv,
gco->ext_info.use_egprs_p_ch_req);
} else {
bitvec_set_bit(bv, 0);
}
/* 4bit BEP PERIOD */
bitvec_set_uint(bv, gco->ext_info.bep_period, 4);
}
bitvec_set_bit(bv, gco->ext_info.pfc_supported);
bitvec_set_bit(bv, gco->ext_info.dtm_supported);
bitvec_set_bit(bv, gco->ext_info.bss_paging_coordination);
}
return 0;
}
/* Append Repeated E-UTRAN Neighbour Cell to bitvec: see 3GPP TS 44.018 Table 10.5.2.33b.1 */
static inline void append_eutran_neib_cell(struct bitvec *bv, struct gsm_bts *bts, uint8_t budget)
{
const struct osmo_earfcn_si2q *e = &bts->si_common.si2quater_neigh_list;
unsigned i, skip = 0;
size_t offset = bts->e_offset;
uint8_t rem = budget - 6, earfcn_budget; /* account for mandatory stop bit and THRESH_E-UTRAN_high */
if (budget <= 6)
return;
OSMO_ASSERT(budget <= SI2Q_MAX_LEN);
/* first we have to properly adjust budget requirements */
if (e->prio_valid) /* E-UTRAN_PRIORITY: 3GPP TS 45.008*/
rem -= 4;
else
rem--;
if (e->thresh_lo_valid) /* THRESH_E-UTRAN_low: */
rem -= 6;
else
rem--;
if (e->qrxlm_valid) /* E-UTRAN_QRXLEVMIN: */
rem -= 6;
else
rem--;
/* now we can proceed with actually adding EARFCNs within adjusted budget limit */
for (i = 0; i < e->length; i++) {
if (e->arfcn[i] != OSMO_EARFCN_INVALID) {
if (skip < offset) {
skip++; /* ignore EARFCNs added on previous calls */
} else {
earfcn_budget = 17; /* compute budget per-EARFCN */
if (OSMO_EARFCN_MEAS_INVALID == e->meas_bw[i])
earfcn_budget++;
else
earfcn_budget += 4;
if (rem - earfcn_budget < 0)
break;
else {
bts->e_offset++;
rem -= earfcn_budget;
bitvec_set_bit(bv, 1); /* EARFCN: */
bitvec_set_uint(bv, e->arfcn[i], 16);
if (OSMO_EARFCN_MEAS_INVALID == e->meas_bw[i])
bitvec_set_bit(bv, 0);
else { /* Measurement Bandwidth: 9.1.54 */
bitvec_set_bit(bv, 1);
bitvec_set_uint(bv, e->meas_bw[i], 3);
}
}
}
}
}
/* stop bit - end of EARFCN + Measurement Bandwidth sequence */
bitvec_set_bit(bv, 0);
/* Note: we don't support different EARFCN arrays each with different priority, threshold etc. */
if (e->prio_valid) {
/* E-UTRAN_PRIORITY: 3GPP TS 45.008*/
bitvec_set_bit(bv, 1);
bitvec_set_uint(bv, e->prio, 3);
} else
bitvec_set_bit(bv, 0);
/* THRESH_E-UTRAN_high */
bitvec_set_uint(bv, e->thresh_hi, 5);
if (e->thresh_lo_valid) {
/* THRESH_E-UTRAN_low: */
bitvec_set_bit(bv, 1);
bitvec_set_uint(bv, e->thresh_lo, 5);
} else
bitvec_set_bit(bv, 0);
if (e->qrxlm_valid) {
/* E-UTRAN_QRXLEVMIN: */
bitvec_set_bit(bv, 1);
bitvec_set_uint(bv, e->qrxlm, 5);
} else
bitvec_set_bit(bv, 0);
}
/* 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;
}
static inline void append_earfcn(struct bitvec *bv, struct gsm_bts *bts, uint8_t budget)
{
int rem = budget - 25;
if (rem <= 0)
return;
OSMO_ASSERT(budget <= SI2Q_MAX_LEN);
/* Additions in Rel-5: */
bitvec_set_bit(bv, H);
/* No 3G Additional Measurement Param. Descr. */
bitvec_set_bit(bv, 0);
/* No 3G ADDITIONAL MEASUREMENT Param. Descr. 2 */
bitvec_set_bit(bv, 0);
/* Additions in Rel-6: */
bitvec_set_bit(bv, H);
/* 3G_CCN_ACTIVE */
bitvec_set_bit(bv, 0);
/* Additions in Rel-7: */
bitvec_set_bit(bv, H);
/* No 700_REPORTING_OFFSET */
bitvec_set_bit(bv, 0);
/* No 810_REPORTING_OFFSET */
bitvec_set_bit(bv, 0);
/* Additions in Rel-8: */
bitvec_set_bit(bv, H);
/* Priority and E-UTRAN Parameters Description */
bitvec_set_bit(bv, 1);
/* No Serving Cell Priority Parameters Descr. */
bitvec_set_bit(bv, 0);
/* No 3G Priority Parameters Description */
bitvec_set_bit(bv, 0);
/* E-UTRAN Parameters Description */
bitvec_set_bit(bv, 1);
/* E-UTRAN_CCN_ACTIVE */
bitvec_set_bit(bv, 0);
/* E-UTRAN_Start: 9.1.54 */
bitvec_set_bit(bv, 1);
/* E-UTRAN_Stop: 9.1.54 */
bitvec_set_bit(bv, 1);
/* No E-UTRAN Measurement Parameters Descr. */
bitvec_set_bit(bv, 0);
/* No GPRS E-UTRAN Measurement Param. Descr. */
bitvec_set_bit(bv, 0);
/* Note: each of next 3 "repeated" structures might be repeated any
(0, 1, 2...) times - we only support 1 and 0 */
/* Repeated E-UTRAN Neighbour Cells */
bitvec_set_bit(bv, 1);
/* N. B: 25 bits are set in append_earfcn() - keep it in sync with budget adjustment below: */
append_eutran_neib_cell(bv, bts, rem);
/* stop bit - end of Repeated E-UTRAN Neighbour Cells sequence: */
bitvec_set_bit(bv, 0);
/* Note: following 2 repeated structs are not supported ATM */
/* stop bit - end of Repeated E-UTRAN Not Allowed Cells sequence: */
bitvec_set_bit(bv, 0);
/* stop bit - end of Repeated E-UTRAN PCID to TA mapping sequence: */
bitvec_set_bit(bv, 0);
/* Priority and E-UTRAN Parameters Description ends here */
/* No 3G CSG Description */
bitvec_set_bit(bv, 0);
/* No E-UTRAN CSG Description */
bitvec_set_bit(bv, 0);
/* No Additions in Rel-9: */
bitvec_set_bit(bv, L);
}
/* Append multiple FDD UARFCNs */
static inline int append_uarfcns(struct bitvec *bv, struct gsm_bts *bts, uint8_t budget)
{
const uint16_t *u = bts->si_common.data.uarfcn_list, *sc = bts->si_common.data.scramble_list;
int i, j, k, rc, st = 0, a[bts->si_common.uarfcn_length];
uint16_t cu = u[bts->u_offset]; /* caller ensures that length is positive */
uint8_t rem = budget - 7, offset_diff; /* account for constant bits right away */
OSMO_ASSERT(budget <= SI2Q_MAX_LEN);
if (budget <= 7)
return -ENOMEM;
/* 3G Neighbour Cell Description */
bitvec_set_bit(bv, 1);
/* No Index_Start_3G */
bitvec_set_bit(bv, 0);
/* No Absolute_Index_Start_EMR */
bitvec_set_bit(bv, 0);
/* UTRAN FDD Description */
bitvec_set_bit(bv, 1);
/* No Bandwidth_FDD */
bitvec_set_bit(bv, 0);
for (i = bts->u_offset; i < bts->si_common.uarfcn_length; i++) {
offset_diff = 0;
for (j = st, k = 0; j < i; j++) {
a[k++] = sc[j]; /* copy corresponding SCs */
offset_diff++; /* compute proper offset step */
}
if (u[i] != cu) { /* we've reached new UARFCN */
rc = append_utran_fdd_length(cu, a, bts->si_common.uarfcn_length, k);
if (rc < 0) { /* estimate bit length requirements */
return rc;
}
if (rem - rc <= 0)
break; /* we have ran out of budget in current SI2q */
else {
rem -= append_utran_fdd(bv, cu, a, k);
bts->u_offset += offset_diff;
}
cu = u[i];
st = i; /* update start position */
}
}
if (rem > 22) { /* add last UARFCN not covered by previous cycle if it could possibly fit into budget */
offset_diff = 0;
for (i = st, k = 0; i < bts->si_common.uarfcn_length; i++) {
a[k++] = sc[i];
offset_diff++;
}
rc = append_utran_fdd_length(cu, a, bts->si_common.uarfcn_length, k);
if (rc < 0) {
return rc;
}
if (rem - rc >= 0) {
rem -= append_utran_fdd(bv, cu, a, k);
bts->u_offset += offset_diff;
}
}
/* stop bit - end of Repeated UTRAN FDD Neighbour Cells */
bitvec_set_bit(bv, 0);
/* UTRAN TDD Description */
bitvec_set_bit(bv, 0);
return 0;
}
/* 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;
}
