diff options
Diffstat (limited to 'openbsc/src/libbsc/system_information.c')
| -rw-r--r-- | openbsc/src/libbsc/system_information.c | 243 |
1 files changed, 222 insertions, 21 deletions
diff --git a/openbsc/src/libbsc/system_information.c b/openbsc/src/libbsc/system_information.c index 9842a9dfd..360d229ad 100644 --- a/openbsc/src/libbsc/system_information.c +++ b/openbsc/src/libbsc/system_information.c @@ -74,16 +74,12 @@ static int freq_list_bmrel_set_arfcn(uint8_t *chan_list, unsigned int arfcn) if (arfcn == min_arfcn) return 0; - if (arfcn < min_arfcn) { - LOGP(DRR, LOGL_ERROR, "arfcn(%u) < min(%u)\n", arfcn, min_arfcn); - return -EINVAL; - } - if (arfcn > min_arfcn + 111) { + if (((arfcn - min_arfcn) & 1023) > 111) { LOGP(DRR, LOGL_ERROR, "arfcn(%u) > min(%u) + 111\n", arfcn, min_arfcn); return -EINVAL; } - bitno = (arfcn - min_arfcn); + bitno = (arfcn - min_arfcn) & 1023; byte = bitno / 8; bit = bitno % 8; @@ -94,19 +90,22 @@ static int freq_list_bmrel_set_arfcn(uint8_t *chan_list, unsigned int arfcn) /* generate a cell channel list as per Section 10.5.2.1b of 04.08 */ static int bitvec2freq_list(uint8_t *chan_list, struct bitvec *bv, - const struct gsm_bts *bts) + const struct gsm_bts *bts, int bis, int ter) { - int i, rc, min = 1024, max = -1; + int i, rc, min = -1, max = -1, pgsm = 0; memset(chan_list, 0, 16); - /* P-GSM-only handsets only support 'bit map 0 format' */ if (bts->band == GSM_BAND_900 - && bts->c0->arfcn >= 1 && bts->c0->arfcn <= 124) { + && bts->c0->arfcn >= 1 && bts->c0->arfcn <= 124) + pgsm = 1; + /* P-GSM-only handsets only support 'bit map 0 format' */ + if (!bis && !ter && pgsm) { chan_list[0] = 0; for (i = 0; i < bv->data_len*8; i++) { - if (bitvec_get_bit_pos(bv, i)) { + if (i >= 1 && i <= 124 + && bitvec_get_bit_pos(bv, i)) { rc = freq_list_bm0_set_arfcn(chan_list, i); if (rc < 0) return rc; @@ -119,10 +118,30 @@ static int bitvec2freq_list(uint8_t *chan_list, struct bitvec *bv, chan_list[0] = 0x8e; for (i = 0; i < bv->data_len*8; i++) { - if (bitvec_get_bit_pos(bv, i)) { - if (i < min) + /* in case of SI2 or SI5 allow all neighbours in same band + * in case of SI*bis, allow neighbours in same band ouside pgsm + * in case of SI*ter, allow neighbours in different bands + */ + if (bitvec_get_bit_pos(bv, i) + && ((!bis && !ter && gsm_arfcn2band(i) == bts->band) + || (bis && pgsm && gsm_arfcn2band(i) == bts->band && (i < 1 || i > 124)) + || (ter && gsm_arfcn2band(i) != bts->band))) { + /* 955..1023 < 0..885 */ + if (min < 0) + min = i; + if (i >= 955 && min < 955) + min = i; + if (i >= 955 && min >= 955 && i < min) min = i; - if (i > max) + if (i < 955 && min < 955 && i < min) + min = i; + if (max < 0) + max = i; + if (i < 955 && max >= 955) + max = i; + if (i >= 955 && max >= 955 && i > max) + max = i; + if (i < 955 && max < 955 && i > max) max = i; } } @@ -133,7 +152,7 @@ static int bitvec2freq_list(uint8_t *chan_list, struct bitvec *bv, return 0; } - if ((max - min) > 111) { + if (((max - min) & 1023) > 111) { LOGP(DRR, LOGL_ERROR, "min_arfcn=%u, max_arfcn=%u, " "distance > 111\n", min, max); return -EINVAL; @@ -144,7 +163,11 @@ static int bitvec2freq_list(uint8_t *chan_list, struct bitvec *bv, chan_list[2] = (min & 1) << 7; for (i = 0; i < bv->data_len*8; i++) { - if (bitvec_get_bit_pos(bv, i)) { + /* see notes above */ + if (bitvec_get_bit_pos(bv, i) + && ((!bis && !ter && gsm_arfcn2band(i) == bts->band) + || (bis && pgsm && gsm_arfcn2band(i) == bts->band && (i < 1 || i > 124)) + || (ter && gsm_arfcn2band(i) != bts->band))) { rc = freq_list_bmrel_set_arfcn(chan_list, i); if (rc < 0) return rc; @@ -179,11 +202,12 @@ static int bitvec2freq_list(uint8_t *chan_list, struct bitvec *bv, } /* then we generate a GSM 04.08 frequency list from the bitvec */ - return bitvec2freq_list(chan_list, bv, bts); + return bitvec2freq_list(chan_list, bv, bts, 0, 0); } /* generate a cell channel list as per Section 10.5.2.1b of 04.08 */ -static int generate_bcch_chan_list(uint8_t *chan_list, struct gsm_bts *bts, int si5) +static int generate_bcch_chan_list(uint8_t *chan_list, struct gsm_bts *bts, + int si5, int bis, int ter) { struct gsm_bts *cur_bts; struct bitvec *bv; @@ -207,7 +231,28 @@ static int generate_bcch_chan_list(uint8_t *chan_list, struct gsm_bts *bts, int } /* then we generate a GSM 04.08 frequency list from the bitvec */ - return bitvec2freq_list(chan_list, bv, bts); + return bitvec2freq_list(chan_list, bv, bts, bis, ter); +} + +static int list_arfcn(uint8_t *chan_list, uint8_t mask, char *text) +{ + int n = 0, i; + struct gsm_sysinfo_freq freq[1024]; + + memset(freq, 0, sizeof(freq)); + gsm48_decode_freq_list(freq, chan_list, 16, 0xce, 1); + for (i = 0; i < 1024; i++) { + if (freq[i].mask) { + if (!n) + LOGP(DRR, LOGL_INFO, "%s", text); + LOGPC(DRR, LOGL_INFO, " %d", i); + n++; + } + } + if (n) + LOGPC(DRR, LOGL_INFO, "\n"); + + return n; } static int generate_si1(uint8_t *output, struct gsm_bts *bts) @@ -226,6 +271,7 @@ static int generate_si1(uint8_t *output, struct gsm_bts *bts) rc = generate_cell_chan_list(si1->cell_channel_description, bts); if (rc < 0) return rc; + list_arfcn(si1->cell_channel_description, 0xce, "Serving cell:"); si1->rach_control = bts->si_common.rach_control; @@ -248,9 +294,11 @@ static int generate_si2(uint8_t *output, struct gsm_bts *bts) si2->header.skip_indicator = 0; si2->header.system_information = GSM48_MT_RR_SYSINFO_2; - rc = generate_bcch_chan_list(si2->bcch_frequency_list, bts, 0); + rc = generate_bcch_chan_list(si2->bcch_frequency_list, bts, 0, 0, 0); if (rc < 0) return rc; + list_arfcn(si2->bcch_frequency_list, 0xce, + "Neighbour cells in same band:"); si2->ncc_permitted = bts->si_common.ncc_permitted; si2->rach_control = bts->si_common.rach_control; @@ -258,6 +306,65 @@ static int generate_si2(uint8_t *output, struct gsm_bts *bts) return sizeof(*si2); } +static int generate_si2bis(uint8_t *output, struct gsm_bts *bts) +{ + int rc; + struct gsm48_system_information_type_2bis *si2b = + (struct gsm48_system_information_type_2bis *) output; + int n; + + memset(si2b, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); + + si2b->header.l2_plen = (22 << 2) | 1; + si2b->header.rr_protocol_discriminator = GSM48_PDISC_RR; + si2b->header.skip_indicator = 0; + si2b->header.system_information = GSM48_MT_RR_SYSINFO_2bis; + + rc = generate_bcch_chan_list(si2b->bcch_frequency_list, bts, 0, 1, 0); + if (rc < 0) + return rc; + n = list_arfcn(si2b->bcch_frequency_list, 0xce, + "Neighbour cells in same band, but outside P-GSM:"); + if (n) { + /* indicate in SI2 and SI2bis: there is an extension */ + struct gsm48_system_information_type_2 *si2 = + (struct gsm48_system_information_type_2 *) + bts->si_buf[SYSINFO_TYPE_2]; + si2->bcch_frequency_list[0] |= 0x20; + si2b->bcch_frequency_list[0] |= 0x20; + } else + bts->si_valid &= ~(1 << SYSINFO_TYPE_2bis); + + si2b->rach_control = bts->si_common.rach_control; + + return sizeof(*si2b); +} + +static int generate_si2ter(uint8_t *output, struct gsm_bts *bts) +{ + int rc; + struct gsm48_system_information_type_2ter *si2t = + (struct gsm48_system_information_type_2ter *) output; + int n; + + memset(si2t, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); + + si2t->header.l2_plen = (22 << 2) | 1; + si2t->header.rr_protocol_discriminator = GSM48_PDISC_RR; + si2t->header.skip_indicator = 0; + si2t->header.system_information = GSM48_MT_RR_SYSINFO_2ter; + + rc = generate_bcch_chan_list(si2t->ext_bcch_frequency_list, bts, 0, 0, 1); + if (rc < 0) + return rc; + n = list_arfcn(si2t->ext_bcch_frequency_list, 0x8e, + "Neighbour cells in different band:"); + if (!n) + bts->si_valid &= ~(1 << SYSINFO_TYPE_2ter); + + return sizeof(*si2t); +} + static struct gsm48_si_ro_info si_info = { .selection_params = { .present = 0, @@ -304,6 +411,13 @@ static int generate_si3(uint8_t *output, struct gsm_bts *bts) si3->cell_sel_par = bts->si_common.cell_sel_par; si3->rach_control = bts->si_common.rach_control; + if ((bts->si_valid & (1 << SYSINFO_TYPE_2ter))) { + LOGP(DRR, LOGL_INFO, "SI 2ter is included.\n"); + si_info.si2ter_indicator = 1; + } else { + si_info.si2ter_indicator = 0; + } + /* SI3 Rest Octets (10.5.2.34), containing CBQ, CELL_RESELECT_OFFSET, TEMPORARY_OFFSET, PENALTY_TIME Power Offset, 2ter Indicator, Early Classmark Sending, @@ -370,9 +484,92 @@ static int generate_si5(uint8_t *output, struct gsm_bts *bts) si5->rr_protocol_discriminator = GSM48_PDISC_RR; si5->skip_indicator = 0; si5->system_information = GSM48_MT_RR_SYSINFO_5; - rc = generate_bcch_chan_list(si5->bcch_frequency_list, bts, 1); + rc = generate_bcch_chan_list(si5->bcch_frequency_list, bts, 1, 0, 0); + if (rc < 0) + return rc; + list_arfcn(si5->bcch_frequency_list, 0xce, + "Neighbour cells in same band:"); + + /* 04.08 9.1.37: L2 Pseudo Length of 18 */ + return l2_plen; +} + +static int generate_si5bis(uint8_t *output, struct gsm_bts *bts) +{ + struct gsm48_system_information_type_5bis *si5b; + int rc, l2_plen = 18; + int n; + + memset(output, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); + + /* ip.access nanoBTS needs l2_plen!! */ + switch (bts->type) { + case GSM_BTS_TYPE_NANOBTS: + case GSM_BTS_TYPE_HSL_FEMTO: + *output++ = (l2_plen << 2) | 1; + l2_plen++; + break; + default: + break; + } + + si5b = (struct gsm48_system_information_type_5bis *) output; + + /* l2 pseudo length, not part of msg: 18 */ + si5b->rr_protocol_discriminator = GSM48_PDISC_RR; + si5b->skip_indicator = 0; + si5b->system_information = GSM48_MT_RR_SYSINFO_5bis; + rc = generate_bcch_chan_list(si5b->bcch_frequency_list, bts, 1, 1, 0); + if (rc < 0) + return rc; + n = list_arfcn(si5b->bcch_frequency_list, 0xce, + "Neighbour cells in same band, but outside P-GSM:"); + if (n) { + /* indicate in SI5 and SI5bis: there is an extension */ + struct gsm48_system_information_type_5 *si5 = + (struct gsm48_system_information_type_5 *) + bts->si_buf[SYSINFO_TYPE_5]; + si5->bcch_frequency_list[0] |= 0x20; + si5b->bcch_frequency_list[0] |= 0x20; + } else + bts->si_valid &= ~(1 << SYSINFO_TYPE_5bis); + + /* 04.08 9.1.37: L2 Pseudo Length of 18 */ + return l2_plen; +} + +static int generate_si5ter(uint8_t *output, struct gsm_bts *bts) +{ + struct gsm48_system_information_type_5ter *si5t; + int rc, l2_plen = 18; + int n; + + memset(output, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); + + /* ip.access nanoBTS needs l2_plen!! */ + switch (bts->type) { + case GSM_BTS_TYPE_NANOBTS: + case GSM_BTS_TYPE_HSL_FEMTO: + *output++ = (l2_plen << 2) | 1; + l2_plen++; + break; + default: + break; + } + + si5t = (struct gsm48_system_information_type_5ter *) output; + + /* l2 pseudo length, not part of msg: 18 */ + si5t->rr_protocol_discriminator = GSM48_PDISC_RR; + si5t->skip_indicator = 0; + si5t->system_information = GSM48_MT_RR_SYSINFO_5ter; + rc = generate_bcch_chan_list(si5t->bcch_frequency_list, bts, 1, 0, 1); if (rc < 0) return rc; + n = list_arfcn(si5t->bcch_frequency_list, 0x8e, + "Neighbour cells in different band:"); + if (!n) + bts->si_valid &= ~(1 << SYSINFO_TYPE_5ter); /* 04.08 9.1.37: L2 Pseudo Length of 18 */ return l2_plen; @@ -481,9 +678,13 @@ typedef int (*gen_si_fn_t)(uint8_t *output, struct gsm_bts *bts); static const gen_si_fn_t gen_si_fn[_MAX_SYSINFO_TYPE] = { [SYSINFO_TYPE_1] = &generate_si1, [SYSINFO_TYPE_2] = &generate_si2, + [SYSINFO_TYPE_2bis] = &generate_si2bis, + [SYSINFO_TYPE_2ter] = &generate_si2ter, [SYSINFO_TYPE_3] = &generate_si3, [SYSINFO_TYPE_4] = &generate_si4, [SYSINFO_TYPE_5] = &generate_si5, + [SYSINFO_TYPE_5bis] = &generate_si5bis, + [SYSINFO_TYPE_5ter] = &generate_si5ter, [SYSINFO_TYPE_6] = &generate_si6, [SYSINFO_TYPE_13] = &generate_si13, }; |