Commit Graph

597 Commits

Author SHA1 Message Date
David Rupprecht 99c3aa9ba2 Refactor assert to TESTASSERT in unit test 2021-01-26 21:19:37 +01:00
Pedro Alvarez 350e90a030 Make RLC retransmissions deterministic. It was creating unpredictablity
in the RLC AM tests. See issue #2228
2021-01-25 14:29:17 +00:00
Pedro Alvarez 6ca8bc12ec Fix wrong SN in RLC status PDU when packet is dropped. 2021-01-21 21:12:30 +01:00
Ismael Gomez a6423442c2
Refactor NR RA files and fix header includes all over library (#2162)
* Refactor NR resource allocation classes. Use DCI instead of grant for dummy PDSCH UE/eNB test

* Minor refactors in NR workers and ue_dl

* Fix include issues

* fix compilation issues
2021-01-20 15:46:46 +01:00
Andre Puschmann 10da7df194 pdu_test: add TC with malformed RAR PDU
a malformed RAR PDU should not be decoded further if the payload
indicates a length beyond the actual PDU size.
2021-01-12 20:24:20 +01:00
Francisco Paisana f8b7351e1b implementation of object memory pool via class-specific operator new/delete 2021-01-12 16:22:10 +01:00
Francisco Paisana e96b8c263a add mem pool test. fix mem pool leak bug 2021-01-12 16:22:10 +01:00
Andre Puschmann 4fa89b7039 pcap: make PCAP write thread-safe
* offload PCAP writing to background thread
* use blocking_queue between writer and clients to make it thread-safe
* add basic test case

this fixes point 1-3 of #2161
2021-01-04 11:05:02 +01:00
Xavier Arteaga b3200d9ef5 Renaming common UL/DL DMRS related types and initial NR PUSCH implementation 2020-12-30 13:39:08 +01:00
Xavier Arteaga 13443c3f8c Added number of DMRS CDM groups without data to NR grant 2020-12-28 10:11:08 +01:00
Francisco Paisana 74ffe393c6 asn1 update: s1ap asn1 is now v16.1 (2020-03) 2020-12-22 16:28:24 +01:00
Francisco Paisana 66aa34d173 update RRC NR ASN1 to 2020-09 v15.11 2020-12-18 12:50:37 +01:00
Andre Puschmann d5daf60773 pdu_test: add unpacking test for DL-SCH PDU containing TA command 2020-12-18 12:28:52 +01:00
Francisco Paisana e27c0869e5 update RRC ASN1 to 2020-09 v15.11 2020-12-17 17:55:58 +01:00
Andre Puschmann bc4c9606ce rlc_am: add extended bearer metrics
this patch adds support for measuring the:
* SDU rx latency (Average time in ms from first RLC segment to full SDU)
* amount of buffered bytes (sum of payload of PDUs buffered in rx_window)

the implementation is using std::chrono
2020-12-17 17:46:55 +01:00
David Rupprecht 826dd32c89 Rename meas_cell to meas_cell_eutra
Added meas_cell_nr class

Make meas_cell list as template class

Inheritance rrc_cell to meas_cell_nr
Added process_new_cell_meas_nr function
2020-12-16 14:12:38 +01:00
faluco f23fdf0639 Include missing files. 2020-12-14 13:46:45 +01:00
faluco 98a2c868b5 Update srslog to latest version. 2020-12-14 13:46:45 +01:00
Francisco b86d2ab7d0 move choice_type to adt folder 2020-12-12 15:59:27 +01:00
Andre Puschmann c0883291f6 rlc: pass TTI to get_metrics to calculate "real" LTE rx/tx rate
when retrieving the RLC metrics, the number of TTIs since the last
call are passed. This allows to calculate the actual rate
based on the LTE timing rather than only the system timing.
2020-12-12 15:59:27 +01:00
Francisco b41fc96d6d fix asn1 integer packing for integer values whose length is equal or above 32 bits 2020-12-12 15:59:27 +01:00
Pedro Alvarez 38206bea69 Fixed RLC AM fixed header size in get_buffer_state function. Fixed RLC AM tests accordingly. 2020-12-12 15:59:27 +01:00
Francisco 5cce2e4dc7 extension of bounded_vector unit test and fix of compilation issues
- now bounded_vector::resize(N) works for move-only types
- bounded_vector assertions now print error messages
- fixed move ctor/assignment of bounded_vector
- created a unit test for bounded_vectors of move-only types
2020-12-12 15:59:27 +01:00
Francisco fc451f17f0 implementation of bounded_vector and respective unit test 2020-12-12 15:59:27 +01:00
Xavier Arteaga 788ed5ce70 Corrected PDCCH SEGFAULT 2020-12-12 15:59:27 +01:00
Xavier Arteaga e07cf513d0 Improved NR blind search and DL test 2020-12-12 15:59:27 +01:00
Xavier Arteaga c635b1e467 Initial NR DCI blind-search 2020-12-12 15:59:27 +01:00
Andre Puschmann 47c5f9e85b remove AGPL header from remaining cpp files
* also add commercial header to come CMake helpers
2020-12-12 15:59:26 +01:00
Xavier Arteaga f9643843a0 SRSENB/UE Fixed NR workers 2020-12-12 15:59:26 +01:00
Xavier Arteaga ac930003be SRSUE: Integrated NR workers 2020-12-12 15:59:26 +01:00
Xavier Arteaga eed9405e40 Moved NR MAX MIMO layers to carrier 2020-12-12 15:59:26 +01:00
Andre Puschmann 07d2bc4fe8 change license header to agnostic version with hint to root LICENSE file 2020-12-12 15:59:25 +01:00
Francisco 66712023bb remove unneeded includes of full rrc asn1 lib 2020-12-12 15:59:25 +01:00
Xavier Arteaga 0396ebae17 Fix UE/ENB DL NR 2020-12-12 15:58:34 +01:00
Xavier Arteaga 8de2870788 Added NR ue_dl, enb_dl and test 2020-12-12 15:58:34 +01:00
Andre Puschmann e227fec3d8 pdu_test: add rigerous test for LBSR content
* make sure upper and lower edges of Table 6.1.3.1-1 in 36.321 are correct
* fix existing BSR test vectors (verified with Wireshark)
2020-12-12 15:58:33 +01:00
Andre Puschmann f155b7a5d5 rlc: fix stopping of poll retx timer (#2006)
* rlc_am: add TC for pollRetx timer handling

* rlc_am: fix stopping of pollRetx timer

stopping the pollRetx timer when receiving a status PDU
without checking the acknowledged PDUs is wrong.

if an ACK for another PDU, for which the polling bit has been set,
is still pending, it won't be rescheduled until another
PDU is transmitted that again starts the pollRetx timer.

this fixes the issue with missing RLC AM segment retx in #1992,
and #2003
2020-12-12 15:58:32 +01:00
Francisco Paisana 510959b50f update nr asn1 files, and asn1 tests 2020-12-12 15:58:32 +01:00
David Rupprecht 387a84ff84 Updated missing byte 2020-11-03 10:03:09 +01:00
David Rupprecht b85cb614aa Added test cases for asn1 decoding lib from pcap 2020-11-03 10:03:09 +01:00
Francisco Paisana c7697b62a6 fix asn1_utils_test. arrays used for equal comparison where not being initialized. 2020-10-22 12:33:11 +01:00
Francisco Paisana 698af97ec4 updated asn1 utils to account for conversion from 0 to bitstring. Added asn1 utils test to repository. 2020-10-20 16:29:44 +01:00
Andre Puschmann 48e7734188 phy_dl_test: fix uninit var 2020-10-18 15:56:16 +02:00
Pedro Alvarez b43e724b4c Remove packing/unpacking code for M2AP. 2020-10-08 11:02:50 +01:00
faluco 51b27fc255
Import latest srslog version (#1796)
* - Import latest srslog version.
- Adjusted the nas_test to create logs correctly.
- Remove timestamp formatting now that is provided by srslog.
2020-09-30 15:52:42 +02:00
Andre Puschmann 58ce9d3959 pdcp: adding basic test to check if control PDUs are handled correctly
use a 3 B long status PDU to check if its dropped from the rx'ing entity
2020-09-29 15:29:04 +02:00
faluco f0d651ae8e - Fixed a leak in the MME class not releasing the static byte buffer pool.
- Now the pool gets destroyed on program exit using a unique_ptr.
- Removed manual cleanup() calls in all the code base to free the pool instance.
2020-09-22 18:00:50 +02:00
Andre Puschmann d48bc8837e pdu: refactor MAC PDU class
this patch refactors the MAC PDU class, the main changes are:

* add to_string() method to pretty print PDU and subheaders
  This allows to have a single log entry per MAC PDU with all its
  contents.
  It removes the C-style fprint() method

* Simplity payload vs. w_payload_ce
  Before we've used payload when reading the PDU and w_payload_ce
  as a buffer when writing. In all getters we needed to differentiate
  between both. Now payload points to w_payload_ce initially and is
  only updated when parsing a new PDU.

* add various helpers, e.g. to get subheader index, update a BSR, ..

* fix PDU test to use new to_string() method
2020-09-03 15:00:36 +02:00
Ismael Gomez 54eed11e1d Refactor decision for extended CSI/SRS 2020-09-03 10:45:06 +02:00
Ismael Gomez e2154d2213 Renamed constants to SRSLTE and use SRSLTE_CFI macros 2020-09-03 10:45:06 +02:00
Andre Puschmann 96c911752c pdu: add test case for issue #1649
testcase checks the correct handling of the remaining PDU space
when a long BSR is added but no space is left in PDU to fit it
2020-08-27 23:46:28 +02:00
Francisco Paisana 834c0b3929 integrated new observer pattern into phy controller fsm 2020-08-24 22:10:32 +01:00
Francisco Paisana b2313e3631 observer pattern classes. Allows auto and explicit dispatch, and specifying which trigger method to use of an observer. 2020-08-24 22:10:32 +01:00
Francisco Paisana 7cd4f45d62 fsm refactor.
- avoid triggering directly a subfsm
- improved metafunctions
- other cleanups
2020-08-18 16:07:21 +01:00
Francisco Paisana 9146e6ddf1 change method name to resize intervals 2020-08-14 15:06:06 +01:00
Francisco Paisana 4457bbda7e added new asserts to interval interface 2020-08-14 15:06:06 +01:00
Francisco Paisana 8b174ce2f4 changed interval interface to disallow interval::stop < interval::start via an assertion 2020-08-14 15:06:06 +01:00
Francisco Paisana c1755727d7 changed interval method names, and added comments and assertions 2020-08-14 15:06:06 +01:00
Francisco Paisana 20b69fb22e substitution of ul_alloc_t for prb_interval 2020-08-14 15:06:06 +01:00
Francisco Paisana 857cc141c7 fix macro checking for exceptions, added missing includes, fixed bounded bitset methods' noexcept specifiers 2020-08-13 13:13:34 +01:00
Francisco Paisana cceeff10de moved expected, bounded_bitset, move_callback to adt folder. created a test for bitset 2020-08-13 13:13:34 +01:00
Francisco Paisana caf862c99f moved expected, bounded_bitset, move_callback to adt folder. created a test for bitset 2020-08-13 13:13:34 +01:00
faluco 072e84cec8 - Simplified the usage of span now with implicit constructors as it should be.
- Added overload for generic containers that have size and data members like vector.
- Removed unnecessary uses of make_span.
2020-08-11 19:47:26 +01:00
faluco 158edd4fe7 Removed init list constructor test. 2020-08-11 19:47:26 +01:00
faluco af8dfcf19c Extended a bit the span implementation with the following changes:
- Documented methods and class.
- Adapted interface to the latest standard: no init list and generic container constructors, new iterator pair ctor.
- Implemented some SFINAE for managing conversions in constructors.
- Re-organised some methods to be grouped by category (modifiers, observers, iterators, ...).
- Added convenience make_span functions.
- Added some more  asserts.
- Adapted test to use some syntax that was modified.
2020-08-11 19:47:26 +01:00
Francisco Paisana 76a62909c1 use of span type for universal array views 2020-08-11 19:47:26 +01:00
Francisco Paisana a9d882c1f1 fix task_scheduler_test. Fix potential reference invalidation in task_scheduler internal tasks data structure 2020-08-11 17:16:06 +01:00
Francisco Paisana 9d877e55b3 add test for when scope exit lambda is an lvalue 2020-08-10 17:23:43 +01:00
Francisco Paisana 0f67bee556 creation of a scope exit standalone file. Created a new folder ADT. Added test for scope exit. 2020-08-10 17:23:43 +01:00
faluco cfd3f51931
Import of srslog into srsepc and srsenb. (#1574)
* - Import of srslog into srsepc and srsenb.
* - Removed logger_file and logger_stdout files.
2020-07-30 19:17:23 +02:00
faluco efdff8ba4c
Import srslog into srsue (#1556)
- Import the srslog project into srslte.
- Ported srsue app to use the new logging framework.
- Implemented a wrapper that dispatches log entries to srslog.
- Renamed an existing log test to be more specific to avoid name clashes.
2020-07-22 16:04:18 +02:00
Andre Puschmann c8b4ba885b rename rlc_tx_queue to byte_buffer_queue
this data structure will be used by the PDCP layer as well.
2020-07-14 18:18:32 +02:00
Andre Puschmann a7911f0dab pdcp,rlc: refactor SDU queueing policy
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
2020-07-13 17:05:28 +02:00
Francisco Paisana 7c364070ee creation of task scheduler interface for classes/functions running outside the main control thread 2020-07-13 11:19:25 +01:00
Francisco Paisana 1a9c04bf2f use of task scheduler handle in pdcp 2020-07-13 11:19:25 +01:00
Francisco Paisana 4f5e65781f created task scheduler class to deal with timers, thread pool, multiqueue, internal tasks 2020-07-13 11:19:25 +01:00
Andre Puschmann 2749c870e3 rlc_am: refactor control test
* move both tests into own functions and call those in main()
* use common test header and macros
2020-07-08 10:09:06 +02:00
Andre Puschmann 58e255cb63 pdu_test: add unit test to verify correct packing of 3B PDU with Short BSR 2020-07-08 10:08:26 +02:00
Andre Puschmann 5589816690 pdu_test: fix PCAP output
API now requires to pass CC index
2020-07-08 10:08:26 +02:00
Francisco Paisana e550bf726d updated fsm to allow enter methods to receive event that caused them 2020-07-06 14:25:03 +01:00
Francisco Paisana 84f34bc736 changed to a label filtering approach for ctest 2020-07-02 15:56:59 +01:00
Francisco Paisana ebb8f18000 set some extra tests with the prefix "long_" 2020-07-02 15:56:59 +01:00
Andre Puschmann a3d7d4517c rlc_um: add dedicated unit test for the PDU packing bug
Here is the test output with the fix disabled:

13:47:42.679774 [RLC_UM_1] [D] MAC opportunity - 14 bytes
13:47:42.679784 [RLC_UM_1] [D] pdu_space=14, head_len=2
13:47:42.679790 [RLC_UM_1] [D]  adding new SDU segment - 10 bytes of 10 remaining
13:47:42.679834 [RLC_UM_1] [D]  Complete SDU scheduled for tx. Stack latency: 0 us
13:47:42.679909 [RLC_UM_1] [D] pdu_space=4, head_len=2
13:47:42.679922 [RLC_UM_1] [D]  adding new SDU segment - 0 bytes of 10 remaining
13:47:42.679928 [RLC_UM_1] [I]  Tx PDU SN=0 (14 B)
13:47:42.679974 [RLC_UM_1] [D]  vt_us = 1

The test checks the correct packing and of the two PDUs at the end.
2020-06-26 17:58:36 +02:00
Andre Puschmann df50dd7d3c rlc: extend RLC metrics
extend RLC metrics to count Rx/Tx PDUs/SDUs bytes/#
2020-06-26 17:58:36 +02:00
Andre Puschmann 48db31c5cf rlc_stress_test: fix random PDU dropping
the rand() was sometimes giving NaN so this case needs to be handled
and the PDU not dropped to have real zero drop-rate
2020-06-26 17:58:36 +02:00
Andre Puschmann fc3cd24177 rlc_um: fix counting of lost PDUs
* change try_push() return value to indicate whether the addition
  of the SDU to the tx queue was successful or not
* count lost PDUs
2020-06-26 17:58:36 +02:00
Andre Puschmann 96726a03e0 rlc_stress_test: fix PCAP support
expose actual RLC configuration to PCAP object
2020-06-26 17:58:36 +02:00
Andre Puschmann 1c7bfde404 rlc_stress_test: fix compilation with PCAP enabled 2020-06-26 17:58:36 +02:00
Francisco Paisana e3e9bbcd62 fix PNF PDU size cutting 2020-06-24 23:28:53 +01:00
Francisco Paisana a0606669e2 fix ue nr gw initialization 2020-06-24 23:28:53 +01:00
Francisco Paisana e6418b4b39 fix variable naming 2020-06-24 23:28:53 +01:00
Francisco Paisana 1d07258458 created pnf bridge executable 2020-06-24 23:28:53 +01:00
Francisco Paisana f0874b780b add radio_base/null classes 2020-06-18 23:37:26 +01:00
Francisco Paisana 64e8f5e3ed update license year 2020-06-18 12:41:54 +01:00
Pedro Alvarez 9c1a7d2cf1 Removed get_bearer_status in PDCP. Renamed get_state/set_state to
get_bearer_state/set_bearer_state.
2020-06-18 12:13:57 +01:00
Pedro Alvarez 208a539499 Split PDCP tx_count state variable into tx_hfn and next_pdcp_tx_sn
variables.
2020-06-18 12:13:57 +01:00
Pedro Alvarez 08578a7331 Switched to use a struct to hold the PDCP entity state variables. Deleted some unecessary setters. 2020-06-18 12:13:57 +01:00
Andre Puschmann 1f73e6ae69 multiqueue: add option to create queue with non-default capacity
this allows to create a queue that has a non-default capacity
currently this is 8192, but the value might now be suitable in some
cases like for TTI sync events
2020-06-12 21:37:10 +02:00
Francisco Paisana 27e5d98ef9 added vnf phy nr 2020-06-11 15:50:36 +01:00
Francisco Paisana b05ce2fe57 added pnf_dummy test 2020-06-11 15:50:36 +01:00
Francisco Paisana 8a022fb35b fix noexcept declaration issue in gcc4.8 2020-06-11 14:25:21 +02:00
Francisco Paisana 6509399ed3 fix for move-only events 2020-06-11 10:37:35 +01:00
Francisco Paisana 12dda03bb8 add ability for fsms to self-trigger 2020-06-11 10:37:35 +01:00
Xavier Arteaga 039f2164a6 Initial Sounding Reference Signals implementation 2020-06-08 09:33:51 +02:00
Francisco Paisana edba7f57e4 corrected mac_nr_pdu includes 2020-05-26 10:02:08 +01:00
Francisco Paisana b4b5cd7cd6 added nr gnb and ue interfaces 2020-05-25 11:48:16 +01:00
Francisco Paisana a2b76a4a5f use references rather than pointers 2020-05-11 16:08:20 +01:00
Francisco Paisana a88bffa5d5 created expected type and respective test 2020-05-11 16:08:20 +01:00
Francisco Paisana cf9d31ea64 fix coverity warning for useless call 2020-05-08 14:14:25 +02:00
Francisco Paisana 2204cab4c8 old gcc version cannot support the detected pattern. Removing it 2020-05-05 19:42:34 +01:00
Francisco Paisana e3d0b1c89e format missing fsm table 2020-05-05 19:42:34 +01:00
Francisco Paisana f4d19a6d44 added fsm table formmatting comments 2020-05-05 19:42:34 +01:00
Francisco Paisana 3ef8c67d67 enter/exit are now inside the state class. No need for friend classes anymore 2020-05-05 19:42:34 +01:00
Francisco Paisana 9b48130ae1 use of transition table to support guards in fsms 2020-05-05 19:42:34 +01:00
Francisco Paisana 04e192eb0f redesign fsm to use transition table 2020-05-05 19:42:34 +01:00
Francisco Paisana e79fc9bf08 fixed generation of ie containers of one single ie object 2020-05-05 13:10:41 +01:00
Xavier Arteaga d94078d543 Minor changes
Fix UE sequence generation

minor change
2020-05-01 21:07:33 +02:00
Xavier Arteaga 9d0a3268e8 Added DL channel estimator algorithm options 2020-04-28 17:26:01 +02:00
Andre Puschmann 39680ffd26 rrc_asn1_decoder: fix uninit var 2020-04-28 12:05:15 +02:00
Francisco Paisana 1c74c5675e remove ambiguous enter/exit template method 2020-04-27 22:19:08 +01:00
Francisco Paisana e1ac6d7cfe use macro to disable throw 2020-04-27 22:19:08 +01:00
David Rupprecht 4e283ec942 Standalone decoders for nas and rrc in asn1 test. Thanks Dirk 2020-04-27 21:01:03 +02:00
Andre Puschmann 5d92111586 pcap: adding SL-SCH support 2020-04-27 15:54:54 +02:00
Francisco Paisana b506e29b72 removed common ce_typeenum 2020-04-24 11:55:53 +01:00
Francisco Paisana 6ddedd5972 moved pdu to common mac folder 2020-04-22 10:06:08 +01:00
Francisco Paisana df0da116ce removed enter state visitor, and srslte::same_state return special case in fsms 2020-04-17 17:09:48 +01:00
Francisco Paisana 63142899d1 simplified some of the fsm sfinae conditions 2020-04-17 17:09:48 +01:00
Francisco Paisana 6322e447e9 fixed issue with subfsm revisits not starting in initial substate 2020-04-17 17:09:48 +01:00
Francisco Paisana d40dcd28f3 removed uneeded swap method 2020-04-17 11:38:24 +01:00
Francisco Paisana b5abba41a3 use normal polymorphism to create vtable 2020-04-17 11:38:24 +01:00
Francisco Paisana e2b10307ea changed inplace_task name to move_callback 2020-04-17 11:38:24 +01:00
Francisco Paisana ee50ed08c2 allow inplace task to be called in const contexts 2020-04-17 11:38:24 +01:00
Francisco Paisana ef834b3c60 changed inplace_task file name 2020-04-17 11:38:24 +01:00
Francisco Paisana a6b7c5d1d2 inplace task now uses small buffer optimization for bigger captures 2020-04-17 11:38:24 +01:00
Francisco Paisana 4b2b76cf01 created inplace task to avoid mallocs in task enqueuing 2020-04-17 11:38:24 +01:00
Andre Puschmann ba4d0aa860 remove blacklisted ARM PHY tests
issue causing decoding failure for QAM256 are fixed now so blacklist can go away
2020-04-15 21:58:55 +02:00
Xavier Arteaga 71476d1079 Minor phy_dl_test modification 2020-04-15 11:39:57 +02:00
Francisco Paisana 4ac07e5abb simplified power off state transition 2020-04-09 18:57:18 +01:00
Francisco Paisana ff988127fe wrote nas fsm test 2020-04-09 18:57:18 +01:00
Francisco Paisana 977a1acc5e eliminated unhandled_event special function. Use react instead. 2020-04-09 18:57:18 +01:00
Francisco Paisana 6e34dadce2 reverted back to tuples to store fsm state_list 2020-04-09 18:57:18 +01:00
Francisco Paisana 4036a6887a clean up enter/exit state methods 2020-04-09 18:57:18 +01:00
Francisco Paisana 8d3427e88a removed namespacing from state printing 2020-04-09 18:57:18 +01:00
Francisco Paisana b699e0e490 enter/exit moved outside of the states, into the fsm. Now i just use the type_name function to get a state name 2020-04-09 18:57:18 +01:00
Francisco Paisana 4a4827a603 created a method to detect unhandled events 2020-04-09 18:57:18 +01:00
Francisco Paisana ec3ef4474e created a simple procedure fsm 2020-04-09 18:57:18 +01:00
Francisco Paisana 1aae510e9d enter/exit are now being called in order 2020-04-09 18:57:18 +01:00
Francisco Paisana 2e15514d00 fix enter/exit calls 2020-04-09 18:57:18 +01:00
Francisco Paisana dc0427804f clean up comments and add some util functions 2020-04-09 18:57:18 +01:00
Francisco Paisana 7dc1489ea7 reintroduced optional enter/exit methods for each state 2020-04-09 18:57:18 +01:00