fixeria has uploaded this change for review. (
https://gerrit.osmocom.org/c/osmo-bts/+/33667 )
Change subject: fix bts_supports_cm(): properly check feature flags for VGCS/VBS
......................................................................
fix bts_supports_cm(): properly check feature flags for VGCS/VBS
cm->spd_ind can take only three values defined in enum rsl_cmod_spd:
0000 0001 RSL_CMOD_SPD_SPEECH
0000 0010 RSL_CMOD_SPD_DATA
0000 0011 RSL_CMOD_SPD_SIGN
According to 3GPP TS 48.058, section 9.3.6, all other values are
reserved, so expecting RSL_CMOD_CRT_TCH_{GROUP,BCAST}_{Lm,Bm} there
is wrong. These values are part of enum rsl_cmod_crt, so the right
field would be not cm->spd_ind, but cm->chan_rt.
Let's check these channel types in a separate stage, before checking
the requested codec. Group them with VAMOS specific types for the
sake of consistency.
Change-Id: I914c84be04da819df9e60e2f5ecc5bac9b61b2e5
Fixes: 44c94fdea "validate RSL "channel rate and type" against VGCS/VBS flags"
Related: OS#4851
---
M src/common/bts.c
1 file changed, 42 insertions(+), 15 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/67/33667/1
diff --git a/src/common/bts.c b/src/common/bts.c
index 0ca4b6d..2f17e0a 100644
--- a/src/common/bts.c
+++ b/src/common/bts.c
@@ -791,6 +791,13 @@
return true;
case RSL_CMOD_SPD_SPEECH:
break;
+ case RSL_CMOD_SPD_DATA:
+ default:
+ return false;
+ }
+
+ /* Stage 1: check support for the requested channel type */
+ switch (cm->chan_rt) {
case RSL_CMOD_CRT_TCH_GROUP_Bm:
case RSL_CMOD_CRT_TCH_GROUP_Lm:
if (!osmo_bts_has_feature(bts->features, BTS_FEAT_VGCS))
@@ -801,21 +808,19 @@
if (!osmo_bts_has_feature(bts->features, BTS_FEAT_VBS))
return false;
break;
- case RSL_CMOD_SPD_DATA:
- default:
- return false;
- }
-
- /* Before the requested pchan/cm combination can be checked, we need to
- * convert it to a feature identifier we can check */
- switch (cm->chan_rt) {
case RSL_CMOD_CRT_OSMO_TCH_VAMOS_Bm:
+ case RSL_CMOD_CRT_OSMO_TCH_VAMOS_Lm:
if (!osmo_bts_has_feature(bts->features, BTS_FEAT_VAMOS))
return false;
- /* fall-through */
- case RSL_CMOD_CRT_TCH_Bm:
+ break;
+ }
+
+ /* Stage 2: check support for the requested codec */
+ switch (cm->chan_rt) {
+ case RSL_CMOD_CRT_OSMO_TCH_VAMOS_Bm:
case RSL_CMOD_CRT_TCH_GROUP_Bm:
case RSL_CMOD_CRT_TCH_BCAST_Bm:
+ case RSL_CMOD_CRT_TCH_Bm:
switch (cm->chan_rate) {
case RSL_CMOD_SP_GSM1:
feature = BTS_FEAT_SPEECH_F_V1;
@@ -832,13 +837,9 @@
}
break;
- case RSL_CMOD_CRT_OSMO_TCH_VAMOS_Lm:
- if (!osmo_bts_has_feature(bts->features, BTS_FEAT_VAMOS))
- return false;
- /* fall-through */
- case RSL_CMOD_CRT_TCH_Lm:
case RSL_CMOD_CRT_TCH_GROUP_Lm:
case RSL_CMOD_CRT_TCH_BCAST_Lm:
+ case RSL_CMOD_CRT_TCH_Lm:
switch (cm->chan_rate) {
case RSL_CMOD_SP_GSM1:
feature = BTS_FEAT_SPEECH_H_V1;
--
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Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-Change-Id: I914c84be04da819df9e60e2f5ecc5bac9b61b2e5
Gerrit-Change-Number: 33667
Gerrit-PatchSet: 1
Gerrit-Owner: fixeria <[email protected]>
Gerrit-MessageType: newchange
