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gitosis at osmocom.org gitosis at osmocom.orgThis is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "UNNAMED PROJECT". The branch, master has been updated via 1275a3f91a744e011b0dba82b09124d249c7abb5 (commit) from a01e2ee177d42bdbeaea00f28bcdd65bc27f96e2 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- http://cgit.osmocom.org/osmo-pcu/commit/?id=1275a3f91a744e011b0dba82b09124d249c7abb5 commit 1275a3f91a744e011b0dba82b09124d249c7abb5 Author: Philipp Maier <pmaier at sysmocom.de> Date: Tue Feb 21 19:35:23 2017 +0100 BTS: Convert relative frame numbers to absolute frame numbers The implementation of the method rcv_rach() in class BTS, restores the absolute frame number of the incoming RACH-Request by using the relative frame number (RFn = Fn mod 42432) from the rach request and the already known internal absolute frame number m_cur_fn, which is continusly updated by the CCU interface. In some rare cases, a RACH request might be received by the BTS, a very short time before the frame number wraps in its 42432. Depending on the PCU location, RACH request might be received by the BSC, which forwards it to the PCU. It is then likely that, while the RACH request is being forwarded to the PCU, the PCU internal absolute frame number wraps before the RACH can be processed. The relative frame number from the rach request would then be interpreted as if it were received after the wrapping of the internal frame number modulos. This commit adds logic to detect and resolve this race condition. Also a unit test is added to check some cornercases. Change-Id: I74f00c11e5739d49f370ce6c357149e81d9aa759 ----------------------------------------------------------------------- Summary of changes: src/bts.cpp | 71 ++++++++++++++++----- src/bts.h | 2 + tests/Makefile.am | 13 +++- tests/fn/FnTest.cpp | 175 ++++++++++++++++++++++++++++++++++++++++++++++++++++ tests/fn/FnTest.ok | 50 +++++++++++++++ tests/testsuite.at | 6 ++ 6 files changed, 301 insertions(+), 16 deletions(-) create mode 100644 tests/fn/FnTest.cpp create mode 100644 tests/fn/FnTest.ok hooks/post-receive -- UNNAMED PROJECT