For whatever reason we need N_TA_offset to be 0 for the basic simulator
to function properly.

This is more a hack than a proper solution. More analysis is needed
to understand what happens and what should be really done.

In TDD mode the eNB does not output data all the time,
only in downlink and special subframes.

The basic simulator needs a continuous stream of samples.

So let's fill the blank with silence.

When compiling in debug mode, the 'inline' semantics of C99 led to the errors:

/roux/w25/openairinterface5g/common/utils/LOG/log.c:479: undefined reference to `log_header'
libUTIL.a(log.c.o): In function `log_dump':
/roux/w25/openairinterface5g/common/utils/LOG/log.c:502: undefined reference to `log_header'
collect2: error: ld returned 1 exit status

Let's use static instead of inline.

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Summary of changes:
- work on flexran
- work on X2
- new implementation of ITTI
- code cleanup
- bug fixes

If the IP address for X2AP is not good, the error message reported
was very unclear. Attempt to make it better.

This commit manually reverts the commits:
- 97c69dc4
- 3278aa49

The basic simulator was not functional anymore because
the UE did not send RRCConnectionSetupComplete due to
some problem in the PDCP layer, most probably.

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

This break was there and went away, for whatever reason...

Merge remote-tracking branch 'origin/347-remove-assertion-ue-dci-handling' into develop_integration_2018_w36

Conflicts:
	openair2/ENB_APP/flexran_agent_common_internal.c
	openair2/LAYER2/MAC/eNB_scheduler_dlsch.c

Merge remote-tracking branch 'origin/issue343_dlcqi_retransmission' into develop_integration_2018_w36

Conflicts:
	openair1/PHY/INIT/init_top.c

Note: we don't include the last commit from origin/recode_itti_from_scratch
because it is just astyle formatting. As of today we don't enforce
astyle and including this work would lead to future merge conflicts.
A proper process to enforce astyle has to be put in place. In the
meantime, no astyle allowed in commits if the changes are too big
and not relevant to work done.

Conflicts:
	cmake_targets/CMakeLists.txt
	openair2/ENB_APP/enb_app.c
	openair2/X2AP/x2ap_common.h

The bug popped up when one UE was doing TCP UL iperf and a second UE
attempted to connect. A crash of the eNB happened because we changed
the wrong NFAPI structure in a TTI where both UEs are scheduled.

Something like that.

SCTP: one to many sockets implementation

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Fix: RAN API: remove_ul_slice() frees ul sched_name pointer, when sched_name set, free it when resetting