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16e3fbadce
Stats.WiFi is now map[string]int8 (json "wf") holding only available RSSI readings; SSID and unavailable signals stay in Info.WiFi. Averages are rounded to whole dBm. Wi-Fi is collected only on the default 60s interval; real-time requests reuse the last snapshot to avoid spawning osascript / dumping the BSS cache every second.
58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
// Package wifi collects only currently associated station interfaces. Collection
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// failures are empty snapshots, never cached connected state.
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package wifi
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import (
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"context"
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"math"
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"os"
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"os/exec"
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"time"
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"unicode/utf8"
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"github.com/henrygd/beszel/internal/entities/system"
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)
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type commandRunner func(context.Context, string, ...string) ([]byte, error)
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func run(ctx context.Context, name string, args ...string) ([]byte, error) {
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cmd := exec.CommandContext(ctx, name, args...)
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cmd.Env = append(os.Environ(), "LC_ALL=C", "LANG=C")
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cmd.WaitDelay = 100 * time.Millisecond
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return cmd.Output()
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}
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// validSSID omits non-UTF-8 SSIDs: 802.11 permits arbitrary octets, but CBOR
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// text strings require UTF-8. Metadata must never invalidate the whole response.
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func validSSID(ssid string) string {
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if !utf8.ValidString(ssid) {
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return ""
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}
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return ssid
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}
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// Collect uses a single deadline across interface queries where supported.
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// Unsupported platforms and denied association access produce no readings;
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// later polls retry.
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func Collect() map[string]system.WiFi {
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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return collect(ctx)
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}
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// Signals reduces a snapshot to the RSSI values stored in stats history.
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// Interfaces without an available reading are omitted.
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func Signals(snapshot map[string]system.WiFi) map[string]int8 {
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var signals map[string]int8
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for id, reading := range snapshot {
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if reading.Signal == nil {
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continue
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}
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if signals == nil {
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signals = make(map[string]int8, len(snapshot))
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}
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signals[id] = int8(max(math.Round(*reading.Signal), math.MinInt8))
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}
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return signals
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}
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