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commit fe2aa68db819d73aec1e98eaa6054d01efb22bd1 Author: Jacob Erlbeck jerlbeck@sysmocom.de Date: Thu Dec 17 13:22:36 2015 +0100

ns: Force a defined state when sending NS RESET

Currently the state is assumed to remain the same while the reset procedure is active. While this works correctly in general, a single unexpected BLOCK_ACK or UNBLOCK_ACK can change the state but will not stop the reset procedure. The leads to repeated RESET messages, where the corresponding RESET_ACK is ignored. This is a stable state which can only be left by manual intervention or by reception of a RESET message from the peer.

This commit changes the RESET timeout handler to set the state to BLOCKED/RESET when sending the new NS RESET message.

Note that this should ensure a clean restart even if the state has been screwed up. It does not fix the handling of BLOCK_ACK or UNBLOCK_ACK in abnormal cases.

Addresses: gprs_ns.c:349 NSEI=8895 Tx NS RESET (NSVCI=8895, cause=O&M intervention) gprs_ns.c:878 NSVCI=8895 Rx NS RESET ACK (NSEI=8895, NSVCI=8895) gprs_ns.c:887 NS RESET ACK Discarding unexpected message for NS-VCI 8895 from SGSN NSEI=8895

Ticket: OW#1551 Sponsored-by: On-Waves ehf

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Summary of changes: src/gb/gprs_ns.c | 6 ++++ tests/gb/gprs_ns_test.c | 18 +++++++++++ tests/gb/gprs_ns_test.ok | 84 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 108 insertions(+)

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