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authorHarald Welte <laforge@gnumonks.org>2019-05-28 17:56:21 +0200
committerHarald Welte <laforge@gnumonks.org>2019-05-28 20:02:04 +0200
commitf85b33f68fcf9b34e723e4571078d7eeb0de5d59 (patch)
tree9b642a42c406506527e1c4177cc3306ea48a3ae8
parent428d03b91920207899c3ce1462c142264e43c5cf (diff)
rest_octets: Add function to parse SI3 rest octets
-rw-r--r--include/osmocom/gsm/gsm48_rest_octets.h3
-rw-r--r--src/gsm/gsm48_rest_octets.c78
-rw-r--r--src/gsm/libosmogsm.map1
3 files changed, 82 insertions, 0 deletions
diff --git a/include/osmocom/gsm/gsm48_rest_octets.h b/include/osmocom/gsm/gsm48_rest_octets.h
index 3029ac5..bc5023a 100644
--- a/include/osmocom/gsm/gsm48_rest_octets.h
+++ b/include/osmocom/gsm/gsm48_rest_octets.h
@@ -87,3 +87,6 @@ struct osmo_gsm48_si13_info {
/* Generate SI13 Rest Octests (Chapter 10.5.2.37b) */
int osmo_gsm48_rest_octets_si13_encode(uint8_t *data, const struct osmo_gsm48_si13_info *si13);
+
+/* Parse SI3 Rest Octets */
+void osmo_gsm48_rest_octets_si3_decode(struct osmo_gsm48_si_ro_info *si3, const uint8_t *data);
diff --git a/src/gsm/gsm48_rest_octets.c b/src/gsm/gsm48_rest_octets.c
index b9d5275..d5c93fe 100644
--- a/src/gsm/gsm48_rest_octets.c
+++ b/src/gsm/gsm48_rest_octets.c
@@ -951,3 +951,81 @@ int osmo_gsm48_rest_octets_si13_encode(uint8_t *data, const struct osmo_gsm48_si
bitvec_spare_padding(&bv, (bv.data_len*8)-1);
return bv.data_len;
}
+
+
+/***********************************************************************
+ * Decoder
+ ***********************************************************************/
+
+/*! Decode SI3 Rest Octests (Chapter 10.5.2.34 / Table 10.4.72).
+ * \param[out] si3 decoded SI3 rest octets
+ * \param[in] encoded SI3 rest octets, 4 octets long */
+void osmo_gsm48_rest_octets_si3_decode(struct osmo_gsm48_si_ro_info *si3, const uint8_t *data)
+{
+ struct osmo_gsm48_si_selection_params *sp = &si3->selection_params;
+ struct osmo_gsm48_si_power_offset *po = &si3->power_offset;
+ struct osmo_gsm48_si3_gprs_ind *gi = &si3->gprs_ind;
+ struct bitvec bv;
+
+ memset(&bv, 0, sizeof(bv));
+ bv.data = (uint8_t *) data;
+ bv.data_len = 4;
+
+ memset(si3, 0, sizeof(*si3));
+
+ /* Optional Selection Paraosmo_gsm48_si_ro_infometers */
+ if (bitvec_get_bit_high(&bv) == H) {
+ sp->present = 1;
+ sp->cbq = bitvec_get_uint(&bv, 1);
+ sp->cell_resel_off = bitvec_get_uint(&bv, 6);
+ sp->temp_offs = bitvec_get_uint(&bv, 3);
+ sp->penalty_time = bitvec_get_uint(&bv, 5);
+ } else
+ sp->present = 0;
+
+ /* Optional Power Offset */
+ if (bitvec_get_bit_high(&bv) == H) {
+ po->present = 1;
+ po->power_offset = bitvec_get_uint(&bv, 2);
+ } else
+ po->present = 0;
+
+ /* System Information 2ter Indicator */
+ if (bitvec_get_bit_high(&bv) == H)
+ si3->si2ter_indicator = 1;
+ else
+ si3->si2ter_indicator = 0;
+
+ /* Early Classmark Sending Control */
+ if (bitvec_get_bit_high(&bv) == H)
+ si3->early_cm_ctrl = 1;
+ else
+ si3->early_cm_ctrl = 0;
+
+ /* Scheduling if and where */
+ if (bitvec_get_bit_high(&bv) == H) {
+ si3->scheduling.present = 1;
+ si3->scheduling.where = bitvec_get_uint(&bv, 3);
+ } else
+ si3->scheduling.present = 0;
+
+ /* GPRS Indicator */
+ if (bitvec_get_bit_high(&bv) == H) {
+ gi->present = 1;
+ gi->ra_colour = bitvec_get_uint(&bv, 3);
+ gi->si13_position = bitvec_get_uint(&bv, 1);
+ } else
+ gi->present = 0;
+
+ /* 3G Early Classmark Sending Restriction. If H, then controlled by
+ * early_cm_ctrl above */
+ if (bitvec_get_bit_high(&bv) == H)
+ si3->early_cm_restrict_3g = 1;
+ else
+ si3->early_cm_restrict_3g = 0;
+
+ if (bitvec_get_bit_high(&bv) == H)
+ si3->si2quater_indicator = 1;
+ else
+ si3->si2quater_indicator = 0;
+}
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 56fed0f..84d71e6 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -309,6 +309,7 @@ osmo_gsm48_rest_octets_si6_encode;
osmo_gsm48_rest_octets_si3_encode;
osmo_gsm48_rest_octets_si4_encode;
osmo_gsm48_rest_octets_si13_encode;
+osmo_gsm48_rest_octets_si3_decode;
gsm48_rr_msg_name;
gsm48_cc_state_name;
gsm48_construct_ra;