Joachim Wiberg 7b7baa0730 modem: expose location and last-change in operational state
Cellular modem location data (GPS coordinates, 3GPP cell info) was
previously CLI-only — 'show modem modem0' shelled out to modem-info
which queried mmcli on demand and rendered straight to terminal.
NETCONF/RESTCONF clients had no view into modem location, and there
was no way to tell how stale any modem-state field was.

This commit moves both into the YANG operational tree so they are
accessible through every northbound interface, not just the CLI.  It
is Phase 1 of the modem GPS / location integration plan; Phase 2 will
route the modem's NMEA TTY into the existing gpsd → chronyd pipeline
so cellular modems can also serve as an NTP fallback time source.

YANG (infix-hardware.yang, revision 2026-05-10):
  - modem-state/last-change (yang:date-and-time): freshness indicator
    for the modem-state subtree, bumped on each modemd poll cycle
  - modem-state/location-state container: source (gps|3gpp|...),
    latitude/longitude/altitude (decimal64 6/6/1 fraction-digits),
    cell-id/lac/tac/mcc/mnc, and its own last-change

Runtime path:
  - modemd's check_location() now writes
    /run/modemd/modemN/location/data.json with the full location data
    plus an RFC3339 last-change.  Atomic via tmp+rename.  Walks the
    mmcli output once instead of twice.
  - check() touches /run/modemd/modemN/state.json with a fresh
    last-change after each successful state poll.
  - yanger/infix_modem.py reads both files via HOST.read_json and
    folds them into the modem-state operational subtree.
  - cli_pretty show_modem_detail rewritten to consume the operational
    tree (same path as 'show modem' overview), with new 'Last Update'
    lines for both top-level state and location.
  - bin/show/modem() consolidated: both 'show modem' and
    'show modem REF' use get_json('/ietf-hardware:hardware') — no
    more direct modem-info subprocess call.

Cleanup along the way:
  - Removed the legacy /run/modemd/modemN/location/{up,down,disabled,
    failed} marker file writes — they had no readers anywhere in the
    tree.  In-memory self.location['state'] is kept purely as the
    edge-trigger for the 'Retrieved GPS location' log line.
  - Aligned now_rfc3339() output with yanger.common.YangDate (+00:00
    form, not Z) so consumers see one consistent yang:date-and-time
    format regardless of producer.
  - Fixed multi-modem SIM scoping in show_modem_detail: now derives
    sim<N> from modem<N> instead of picking the first SIM globally.

The bearer / hardware-revision / phone-number / supported-carrier
sections of 'show modem REF' are deliberately omitted for now —
those fields are not yet in the YANG tree.  Bearer details in
particular likely belong on the wwan interface
(ietf-interfaces:interfaces-state) rather than on the modem hardware
component, and can be addressed in a follow-up.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
2026-06-07 20:51:02 +02:00
2022-12-05 21:09:05 +01:00

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interfaces {
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+        prefix-length 24;
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}
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INTERFACE       PROTOCOL   STATE       DATA                                  
lo              ethernet   UP          00:00:00:00:00:00
                ipv4                   127.0.0.1/8 (static)
                ipv6                   ::1/128 (static)
eth0            ethernet   UP          52:54:00:12:34:56
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