Unlike the previous commit, in noS1, we cannot use Attach(), as noS1
automatically brings up an interface, no matter whether the connection
succeeded or not. Therefore, consistently wait a bit longer to increase
the chance that the radio is really up.

For various reasons, the UE might take longer to connect to the eNB. A
simple sleep might not be enough; instead, use Attach() to actively wait
that the UE gets an IP address. The added bonus of this function is that
it will also stop&restart a UE if it did not attach, i.e., it will try
multiple times to attach the UE.

The code (author) confused MCE_PARAMS_DESC and MCE_NETPARAMS_DESC and
tried to read the MCE name from MCE_NETPARAMS_DESC when in reality it
should come from MCE_PARAMS_DESC. This commit fixes to use the right
array.

Same reasoning as in previous commit.

Same reasoning as in the previous commit.

Some reasoning as in previous commit.

Same reasoning as in the previous commit.

Remove filling of broadcast_plmn, which does not exist in the
configuration.

In a previous commit, the functionality of handling IPv6 (and DNS names)
as part of the IPv4 was introduced (in IPv4 field for backwards
compatibility). This commit now removes superfluous configuration
fields:
- IPv6:  handled by IPv4 field
- active: users can just remove an entry
- preference: not needed

Rewrite sctp_create_new_listener() to use getaddrinfo() to look up
IPv4/IPv6 addresses via a common interface. This allows to use e.g. DNS,
and enables the SCTP library to listen on IPv6 ports.

To support the above, the corresponding message is changed to not take
an IPv4 address on 4 bytes (and separate IPv6), but a single name that
will be resolved via getaddrinfo()

The previous init message used to allow multiple IPv4/IPv6 addresses;
since this is not used anywhere, remove the corresponding functionality.

Modify all uses of this ITTI message to copy te SCTP init bind addr into
ITTI message.

Use getaddrinfo() to look up IP (v4/v6) addresses. The old
interface of separately specifying IPv4 and IPv6 addresses is
preserved, but both fields allow to specify types of addresses, and we
will remove one field in the future.

After the last commit, it is not possible to bind on separate interfaces
for F1-C and F1-U. In other words, it is for instance not possible to
have the F1-C on one subnet on one physical interface, and F1-U on
another subnet on another physical interface. This commit introduces a
second option MACRLCs.[0].local_n_address_f1u to allow to bind F1-U on
an alternative address; if it is not specified, the interface of F1-C is
reused.

The above only works for the DU; no corresponding option exists for the
CU. For the CU, use separate CU-CP and CU-UP.

Use it in the CI.

This reverts commit 28411652.

The problem is that (1) we don't really support multi-homing, but (2) on
some system, if the other IP addresses that the operating system
considers part of the multi-homed connection are HEARTBEAT'ed (e.g.,
docker), they answer with SCTP ABORT, which breaks the entire
connection.

In other words, force single-homing by binding. For F1-U uses, another
option will be introduced that allows to bind to a separate interface
for F1-U (separate from F1-C), if necessary.

Closes #727

    - adding a new test case
    - the test case simulate a DL radio channel with noise and runs Iperf test with such channel conditions
    - use CustomCommand class to send commands to a Telnet server
    - switched from netcat’s unsupported -N option (OpenBSD) to --send-only (Ncat 7.94) for compatibility with CI

re-sync CI test in F1 RFSIM

- to be used in the future, for CI of RRCReestablishment in RFSIM
- adding four new test cases (040021, 040022, 040023, 040023) to the RFSIM F1 configuration
- the test cases simulate a disruption of the radio channel, verify UE sync loss and resync
  and restore the original channel conditions
- use CustomCommand class to send commands to a Telnet server

temp xml

- enhanced CustomCommand logging
- print ParseError

- created new telnet library ciUE
- using X-macro defined NR_UE_L2_STATE string array to get UE sync state
- add telnet CI to nrUE container

- this change simplifies the enum definition and makes it easier
  to add, remove, or modify states in the future
- the states are now defined in the NR_UE_L2_STATES macro,
  and the enum members are generated automatically from this macro

Add AWGN channel with some noise and additional path loss.

Delete small pieces of dead code

- allows for simplification of the log collection in SA-2x2 pipeline
- ci-scripts/Jenkinsfile-nrue can be reused
- to be tested!