Current OpenBSC + LCR using MNCC socket

[Lennart Müller]

Hello,

since some days I'm using an old version of OpenBSC and LCR (as suggested by
University of Freiburg) to interconnect our GSM and PSTN. We are using
Debian squeeze and a nanoBTS.
However, I would like to upgrade to a newer version of OpenBSC.
Unfortunately, no current LCR version compiles without errors such as
missing declarations etc., for example:

g++ -DHAVE_CONFIG_H -I.   -DWITH_GSM_BS -I./openbsc/include
-I./libosmocore/include -I./openbsc   -Wall
-DCONFIG_DATA="\"/usr/local/lcr\"" -DSHARE_DATA="\"/usr/local/lcr\""
-DLOG_DIR="\"/usr/local/lcr\""
-DEXTENSION_DATA="\"/usr/local/lcr/extensions\""    -g -O2 -MT gsm.o -MD -MP
-MF .deps/gsm.Tpo -c -o gsm.o gsm.cpp
In file included from ./openbsc/include/openbsc/rest_octets.h:4,
                 from ./openbsc/include/openbsc/gsm_data.h:9,
                 from gsm_bs.h:2,
                 from main.h:157,
                 from gsm.cpp:12:
./openbsc/include/openbsc/gsm_04_08.h:33: error: use of enum ‘gsm_chan_t’
without previous declaration
./openbsc/include/openbsc/gsm_04_08.h:33: error: invalid type in declaration
before ‘;’ token
./openbsc/include/openbsc/gsm_04_08.h:34: error: use of enum
‘gsm_chreq_reason_t’ without previous declaration
./openbsc/include/openbsc/gsm_04_08.h:34: error: invalid type in declaration
before ‘;’ token
In file included from ./openbsc/include/openbsc/gsm_data_shared.h:11,
                 from ./openbsc/include/openbsc/gsm_data.h:154,
                 from gsm_bs.h:2,
                 from main.h:157,
                 from gsm.cpp:12:
./libosmocore/include/osmocom/gsm/gsm_utils.h:62: error: expected identifier
before ‘)’ token
./libosmocore/include/osmocom/gsm/gsm_utils.h:62: error: two or more data
types in declaration of ‘parameter’
gsm.cpp: In function ‘gsm_mncc* create_mncc(int, unsigned int)’:
gsm.cpp:195: error: invalid application of ‘sizeof’ to incomplete type
‘gsm_mncc’

etc. etc.

If I manually include some header files from libosmocore and OpenBSC to LCR
and declare missing ENUMs (dirty hacks), LCR starts without a problem.
Starting osmo-nitb with -P and -m parameters, LCR can connect to MNCC
socket. But any try to start voice traffic either from or to a mobile
station results into these continuous messages:

<0006> gsm_04_08.c:2954 receive message GSM_TCH_FRAME
<0006> gsm_04_08.c:2986 TCH frame to lchan without RTP connection
<0006> gsm_04_08.c:2954 receive message GSM_TCH_FRAME
<0006> gsm_04_08.c:2986 TCH frame to lchan without RTP connection
<0006> gsm_04_08.c:2954 receive message GSM_TCH_FRAME
<0006> gsm_04_08.c:2986 TCH frame to lchan without RTP connection
.....

Furthermore, either OpenBSC ignores LCR messages or LCR does not send
messages to OpenBSC, because calls from mobile stations are signalled
through LCR to asterisk; calls from asterisk to a mobile station are
indicated by LCR but not by OpenBSC.

All configuration files of the running setup (openbsc.cfg, LCR files) are
used.
Commits...
- LCR: 39a36cb99a6dba1441a7a4b51914e0dadf3a7ae8
- libosmocore: 95f7eb288c4b8b69d61fa8d68957fb21f09e11e5
- OpenBSC: fe2d9b2fab2ae36a12411435f910efc9697d7b18 (debian branch, but same
problem with master)

Is there really no possibility at the moment to run LCR with a current
OpenBSC?

Many thanks in advance,
Lennart
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