[S] Change in osmo-bsc[master]: ASCI: Add support for sending RSL UNIT-DATA towards BTS

[jolly]

jolly has uploaded this change for review. ( 
https://gerrit.osmocom.org/c/osmo-bsc/+/33607 )


Change subject: ASCI: Add support for sending RSL UNIT-DATA towards BTS
......................................................................

ASCI: Add support for sending RSL UNIT-DATA towards BTS

This is required to send UPLINK FREE and UPLINK BUSY messages to the
BTS.

Change-Id: I25e80f079989a4c7dede58c327c22b958784f3ff
Related: OS#4852
---
M include/osmocom/bsc/abis_rsl.h
M src/osmo-bsc/abis_rsl.c
M src/osmo-bsc/gsm_04_08_rr.c
3 files changed, 48 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/07/33607/1

diff --git a/include/osmocom/bsc/abis_rsl.h b/include/osmocom/bsc/abis_rsl.h
index 83e8f7d..3da0d6c 100644
--- a/include/osmocom/bsc/abis_rsl.h
+++ b/include/osmocom/bsc/abis_rsl.h
@@ -62,6 +62,7 @@
 int gsm48_send_rr_ass_cmd(struct gsm_lchan *dest_lchan, struct gsm_lchan 
*lchan, uint8_t power_command);

 int rsl_data_request(struct msgb *msg, uint8_t link_id);
+int rsl_unit_data_request(struct msgb *msg, uint8_t link_id);
 int rsl_establish_request(struct gsm_lchan *lchan, uint8_t link_id);
 int rsl_relase_request(struct gsm_lchan *lchan, uint8_t link_id);

diff --git a/src/osmo-bsc/abis_rsl.c b/src/osmo-bsc/abis_rsl.c
index f3ab8d6..1b02450 100644
--- a/src/osmo-bsc/abis_rsl.c
+++ b/src/osmo-bsc/abis_rsl.c
@@ -1157,6 +1157,31 @@
        return abis_rsl_sendmsg(msg);
 }

+/* Send "UNIT DATA REQUEST" message with given L3 Info payload */
+/* Chapter 8.3.11 */
+int rsl_unit_data_request(struct msgb *msg, uint8_t link_id)
+{
+       int chan_nr;
+
+       if (msg->lchan == NULL) {
+               LOGP(DRSL, LOGL_ERROR, "cannot send UNIT DATA REQUEST to 
unknown lchan\n");
+               msgb_free(msg);
+               return -EINVAL;
+       }
+
+       chan_nr = gsm_lchan2chan_nr(msg->lchan, true);
+       if (chan_nr < 0) {
+               msgb_free(msg);
+               return chan_nr;
+       }
+
+       rsl_rll_push_l3(msg, RSL_MT_UNIT_DATA_REQ, chan_nr, link_id, 1);
+
+       msg->dst = rsl_chan_link(msg->lchan);
+
+       return abis_rsl_sendmsg(msg);
+}
+
 /* Send "ESTABLISH REQUEST" message with given L3 Info payload */
 /* Chapter 8.3.1 */
 int rsl_establish_request(struct gsm_lchan *lchan, uint8_t link_id)
diff --git a/src/osmo-bsc/gsm_04_08_rr.c b/src/osmo-bsc/gsm_04_08_rr.c
index ae54cf5..5c2b0f8 100644
--- a/src/osmo-bsc/gsm_04_08_rr.c
+++ b/src/osmo-bsc/gsm_04_08_rr.c
@@ -57,6 +57,15 @@
        return rsl_data_request(msg, 0);
 }

+int gsm48_sendmsg_unit(struct msgb *msg)
+{
+       if (msg->lchan)
+               msg->dst = rsl_chan_link(msg->lchan);
+
+       msg->l3h = msg->data;
+       return rsl_unit_data_request(msg, 0);
+}
+
 /* Section 9.1.8 / Table 9.9 */
 struct chreq {
        uint8_t val;

--
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Gerrit-Project: osmo-bsc
Gerrit-Branch: master
Gerrit-Change-Id: I25e80f079989a4c7dede58c327c22b958784f3ff
Gerrit-Change-Number: 33607
Gerrit-PatchSet: 1
Gerrit-Owner: jolly <andr...@eversberg.eu>
Gerrit-MessageType: newchange