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Replace the hardcoded list of open commands (accessible over UDP), with a list that can be configured with a new "opencommands" directive. The default matches the original list. All read-only commands except accheck and cmdaccheck can be enabled. The naming follows the chronyc naming. Enable the N_SOURCES request only when needed. This makes it possible to have a full monitoring access without access to the Unix domain socket. It also allows restricting the monitoring access to a smaller number of commands if some commands from the default list are not needed. Mention in the man page that the protocol of the non-default commands is not consider stable and the information they provide may have security implications.
This is a collection of simulation tests using the clknetsim simulator (supported on Linux only). https://github.com/mlichvar/clknetsim The CLKNETSIM_PATH environment variable should point to the directory where clknetsim was downloaded and compiled. If the variable is not set, the tests will look for clknetsim in ./clknetsim in the current directory. The tests are written in bash and they can be run directly. The ./run script runs all tests.