[PATCH] osmo-msc[master]: Fix gsm_pchan2chan_nr() to use RSL_CHAN_OSMO_PDCH

[Neels Hofmeyr]

Review at  https://gerrit.osmocom.org/3660

Fix gsm_pchan2chan_nr() to use RSL_CHAN_OSMO_PDCH

When converting from GSM_PCHAN_PDCH, we should generate
a RSL channel number IE with the osmocom extension
RSL_CHAN_OSMO_PDCH rather than claiming it is a regular
TCH/F channel.

This is important as this function is used by
osmo-bts, too - and it decides which channel number IE is
put in the GSMTAP header for both GSMTAP tracing as well
as the GSMTAP based osmo-bts-virtual.

In order to avoid any unintended effect on libbsc,
we make sure to modify rsl_ipacc_pdch_activate() to
always use GSM_PCHAN_TCH_F in related RSL message.

Change-Id: Ie34219e64a6d89da4a79f2db8ec73d1909fb8280
---
M src/libbsc/abis_rsl.c
M src/libcommon/gsm_data_shared.c
2 files changed, 5 insertions(+), 2 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/60/3660/1

diff --git a/src/libbsc/abis_rsl.c b/src/libbsc/abis_rsl.c
index 3337b90..4f687a0 100644
--- a/src/libbsc/abis_rsl.c
+++ b/src/libbsc/abis_rsl.c
@@ -2450,7 +2450,7 @@
 	dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
 	init_dchan_hdr(dh, msg_type);
 	dh->c.msg_discr = ABIS_RSL_MDISC_DED_CHAN;
-	dh->chan_nr = gsm_pchan2chan_nr(GSM_PCHAN_PDCH, ts->nr, 0);
+	dh->chan_nr = gsm_pchan2chan_nr(GSM_PCHAN_TCH_F, ts->nr, 0);
 
 	DEBUGP(DRSL, "%s IPAC PDCH %sACT\n", gsm_ts_name(ts),
 		act ? "" : "DE");
diff --git a/src/libcommon/gsm_data_shared.c b/src/libcommon/gsm_data_shared.c
index d792f3b..2696273 100644
--- a/src/libcommon/gsm_data_shared.c
+++ b/src/libcommon/gsm_data_shared.c
@@ -644,11 +644,14 @@
 
 	switch (pchan) {
 	case GSM_PCHAN_TCH_F:
-	case GSM_PCHAN_PDCH:
 	case GSM_PCHAN_TCH_F_PDCH:
 		OSMO_ASSERT(lchan_nr == 0);
 		cbits = 0x01;
 		break;
+	case GSM_PCHAN_PDCH:
+		OSMO_ASSERT(lchan_nr == 0);
+		cbits = RSL_CHAN_OSMO_PDCH >> 3;
+		break;
 	case GSM_PCHAN_TCH_H:
 		OSMO_ASSERT(lchan_nr < 2);
 		cbits = 0x02;

-- 
To view, visit https://gerrit.osmocom.org/3660
To unsubscribe, visit https://gerrit.osmocom.org/settings

Gerrit-MessageType: newchange
Gerrit-Change-Id: Ie34219e64a6d89da4a79f2db8ec73d1909fb8280
Gerrit-PatchSet: 1
Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-Owner: Neels Hofmeyr <nhofmeyr at sysmocom.de>