this patch refactors the SDU queuing and dropping policy of the RLC and PDCP layer.
the previous design had issues when packets have been generated at a higher
rate above the PDCP than they could be consumed below the RLC.
When the RLC SDU queues were full, we allowed two policies, one to block on the write
and the other to drop the SDU. Both options are not ideal because they either
lead to a blocking stack thread or to lost PDCP PDUs.
To avoid this, this patch makes the following changes:
* PDCP monitors RLC's SDU queue and drops packets on its north-bound SAP if queues are full
* a new method sdu_queue_is_full() has been added to the RLC interface for PDCP
* remove blocking write from pdcp and rlc write_sdu() interface
* all writes into queues need to be non-blocking
* if Tx queues are overflowing, SDUs are dropped above PDCP, not RLC
* log warning if RLC still needs to drop SDUs
* this case should be avoided with the monitoring mechanism
with ZMQ RF, we've seen the radio returning -1 and traced
the issue down to the ringbuffer.
in fact, pthread_cond_timedwait() returned 22 (EINVAL) indicating
a wrong timeout value. The issue was likely an overflow
in the timespec parameter. This patch checks for the return
value of pthread_cond_timedwait() and also calculates the
nanosecond wrap around for the timespec
amarisoft flags an RF error and exits after not receiving samples
for the radio. Running with ZMQ in the RFCI, the UE sometimes needs more
time to start up due to slow processing and no fftw wisdom file and
then Amarisoft eNB times out. This gives the whole process a little
bit more time. Should we still find it too short we may increase
it further.
This lock was removed in 1cbf7eac because it was considered unneeded.
However, as can be seen in issue #1503, we need to protect the access
to rx_window, for example.
Issue #1503 shows a stack trace where a PHY worker generates a status PDU.
While holding the mutex to access rx_window, the stack thread on the
other hand, happily accesses the rx_window member without acquiring
the lock. This commit protects all handle_*() functions in write_pdu().
This reverts commit 1cbf7eac04.
instead of logging PDU received from below, and SDU that is forwarded
to above, only log the PDU in rx in info mode.
The next layer will do the same and log the PDU received (which is the SDU coming from here)
so there is now loss of information in the logs.
during the PDU packing it could happen that a new SDU segment
was added but the resulting larger header was so big that not even
a single byte of the new PDU could be added. because this
corner case wasn't handled correctly an invalid PDU was transmitted.
the solution is to revert the addition of the new SDU.
* state funktion for eia1 (mitigate race condition)
* Extra file for snow3g
* just use mbedtls aes
* ref specification
* adding const keyword to security functions
Use the return value of parse_string function to determine whether a parameter was found.
I experienced issues when the rx_type was set, but the rx_format was not. This led to "Unsupported sample format pub" as the tmp variable is still set to the value of the rx_type.
clang complained about an uinit var that is returned and it turned
out that we don't even implement that function in NEON.
I've found a nice MIT-licensed header that was easy to integrate.
this fixes the subframe-accurate rx in tracking mode.
previously we've only alligned to the next subframe start in find and
when there was a single overflow we've lost the track.
this patch calculates the offset in samples to the actual start of the
subframe (full ms of the receive timestamp) vs. the actual
receive timestamp and uses the value as the "next_rf_sample_offset"
to realign on the next receive
we've used a macro that can return -1 as access index
for an array. this has now been converted in a member
that is initialized and checked during init