[M] Change in osmo-bsc[master]: ASCI: Add TX support for UPLINK FREE/BUSY messages

[jolly]

jolly has uploaded this change for review. ( 
https://gerrit.osmocom.org/c/osmo-bsc/+/33608 )


Change subject: ASCI: Add TX support for UPLINK FREE/BUSY messages
......................................................................

ASCI: Add TX support for UPLINK FREE/BUSY messages

Change-Id: Ia27e0ebb5bf7edb1b9f84999cafc028231b9489f
Related: OS#4852
---
M include/osmocom/bsc/gsm_04_08_rr.h
M src/osmo-bsc/gsm_04_08_rr.c
2 files changed, 57 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/08/33608/1

diff --git a/include/osmocom/bsc/gsm_04_08_rr.h 
b/include/osmocom/bsc/gsm_04_08_rr.h
index c0f8d4b..3106e77 100644
--- a/include/osmocom/bsc/gsm_04_08_rr.h
+++ b/include/osmocom/bsc/gsm_04_08_rr.h
@@ -34,6 +34,8 @@
                           const uint8_t *apdu_data, ssize_t apdu_data_len);
 int gsm48_lchan_modify(struct gsm_lchan *lchan, uint8_t mode);
 int gsm48_send_uplink_release(struct gsm_lchan *lchan, uint8_t cause);
+int gsm48_send_uplink_busy(struct gsm_lchan *lchan);
+int gsm48_send_uplink_free(struct gsm_lchan *lchan, uint8_t acc_bit, uint8_t 
*uic);
 int gsm48_rx_rr_modif_ack(struct msgb *msg);
 int gsm48_parse_meas_rep(struct gsm_meas_rep *rep, struct msgb *msg);

diff --git a/src/osmo-bsc/gsm_04_08_rr.c b/src/osmo-bsc/gsm_04_08_rr.c
index 5c2b0f8..6d74e43 100644
--- a/src/osmo-bsc/gsm_04_08_rr.c
+++ b/src/osmo-bsc/gsm_04_08_rr.c
@@ -770,6 +770,51 @@
        return gsm48_sendmsg(msg);
 }

+/* TS 44.018 section 9.1.46 */
+int gsm48_send_uplink_busy(struct gsm_lchan *lchan)
+{
+       struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 UL BUSY");
+       struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+
+       msg->lchan = lchan;
+       gh->proto_discr = GSM48_PDISC_RR;
+       gh->msg_type = GSM48_MT_RR_UPLINK_BUSY;
+
+       return gsm48_sendmsg_unit(msg);
+}
+
+/* TS 44.018 section 9.1.47 */
+int gsm48_send_uplink_free(struct gsm_lchan *lchan, uint8_t acc_bit, uint8_t 
*uic)
+{
+       struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 UL FREE");
+       struct gsm48_hdr_sh *sh = (struct gsm48_hdr_sh *) msgb_put(msg, 
sizeof(*sh) + 22);
+       struct bitvec *bv = bitvec_alloc(22, NULL);
+
+       msg->lchan = lchan;
+       sh->rr_short_pd = GSM48_PDISC_SH_RR;
+       sh->msg_type = GSM48_MT_RR_SH_UL_FREE;
+       sh->l2_header = 0;
+
+       /* < Uplink Access Request bit > */
+       bitvec_set_bit(bv, (acc_bit) ? H : L);
+
+       /* { L | H <Uplink Identity Code bit(6) > } */
+       if (uic) {
+               bitvec_set_bit(bv, H);
+               sh->data[0] = 0x40 | *uic;
+       } else
+               bitvec_set_bit(bv, L);
+
+       /* Emergency mode not supported */
+
+       /* Padding the rest with 0x2B and apply to msg. */
+       bitvec_spare_padding(bv, 175);
+       bitvec_pack(bv, sh->data);
+       bitvec_free(bv);
+
+       return gsm48_sendmsg_unit(msg);
+}
+
 int gsm48_rx_rr_modif_ack(struct msgb *msg)
 {
        struct gsm48_hdr *gh = msgb_l3(msg);

--
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Gerrit-Project: osmo-bsc
Gerrit-Branch: master
Gerrit-Change-Id: Ia27e0ebb5bf7edb1b9f84999cafc028231b9489f
Gerrit-Change-Number: 33608
Gerrit-PatchSet: 1
Gerrit-Owner: jolly <andr...@eversberg.eu>
Gerrit-MessageType: newchange