tree 5980d3e6d1e8abcd510483f74b3d42fc66571520
parent e503c949b95761dc8cc964e6ce3c539747b51a2c
author Abtin Keshavarzian <abtink@google.com> 1621992847 -0700
committer GitHub <noreply@github.com> 1621992847 -0700
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[srp-client] support saving selected server info (by auto-start) (#6672)

This commit adds support for a new feature in SRP client which allows
it to save the selected server info (by the auto-start feature) in
non-volatile settings. On SRP client restart (e.g., due to a device
reset) the client will select the same server when searching to
discover and pick one from the Thread Network Data service entries.
Config `OPENTHREAD_CONFIG_SRP_CLIENT_SAVE_SELECTED_SERVER_ENABLE` can
be used to enable/disable this feature.

The server info is saved only after the host info is successfully
registered with the server and if it is selected by auto-start from a
network data SRP *unicast* service entry.

This commit also adds `test_srp_client_save_server_info.py` test-case
which verifies the behavior of the new feature.