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Peers: optional latency check with per-peer setting

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The server pings a peer's tunnel address every 30 s and shows the median
of the last 5 minutes in the peer list (with a 1-hour sparkline) and a
24-hour chart on the peer page. Off by default; "active" pings only
while the device sends traffic, "always" keeps the tunnel up.
This commit is contained in:
Daniel Redetzke
2026-10-04 14:28:44 +03:00
parent b0be0b0ceb
commit 7391aac429
14 changed files with 737 additions and 33 deletions
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stats.go
+22 -12
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@@ -37,6 +37,7 @@ type peerStats struct {
Hourly []bucket `json:"hourly"`
Daily []bucket `json:"daily"`
Sessions []connSession `json:"sessions,omitempty"`
Latency []latBucket `json:"latency,omitempty"`
}
// session is one stretch of a peer being online from one address. When the
@@ -114,10 +115,13 @@ type Stats struct {
store *Store
kernel Kernel
geo *Geo // nil: no country and network lookups
live map[string]*latLive // by peer ID
pingErr error // of the last latency check
}
func openStats(path string, store *Store, k Kernel) (*Stats, error) {
s := &Stats{path: path, store: store, kernel: k, data: statsFile{Version: 1, Peers: map[string]*peerStats{}}}
s := &Stats{path: path, store: store, kernel: k, live: map[string]*latLive{}, data: statsFile{Version: 1, Peers: map[string]*peerStats{}}}
b, err := os.ReadFile(path)
if errors.Is(err, os.ErrNotExist) {
return s, nil
@@ -182,7 +186,7 @@ func (s *Stats) prune(c StatsConfig, now time.Time) {
if i > 0 {
ps.Sessions = append([]connSession(nil), ps.Sessions[i:]...)
}
if len(ps.Hourly) != h || len(ps.Daily) != dl || len(ps.Sessions) != sl {
if pruneLatency(ps, now) || len(ps.Hourly) != h || len(ps.Daily) != dl || len(ps.Sessions) != sl {
s.dirty = true
}
}
@@ -223,6 +227,9 @@ func (s *Stats) sample() {
dRx, dTx = smp.RxBytes, smp.TxBytes
}
ps.LastRx, ps.LastTx = smp.RxBytes, smp.TxBytes
if dRx >= activeRxBytes {
s.liveFor(id).lastActive = now
}
if dRx > 0 || dTx > 0 {
ps.TotalRx += dRx
ps.TotalTx += dTx
@@ -241,6 +248,7 @@ func (s *Stats) sample() {
for id, ps := range s.data.Peers {
if !exists[id] {
delete(s.data.Peers, id)
delete(s.live, id)
s.dirty = true
continue
}
@@ -349,16 +357,17 @@ func (s *Stats) series(ids []string, rng string) []Point {
// PeerSummary is the live state shown in peer lists.
type PeerSummary struct {
Online bool `json:"online"`
LastHandshake *time.Time `json:"lastHandshake"`
Endpoint string `json:"endpoint"`
Down24h int64 `json:"down24h"`
Up24h int64 `json:"up24h"`
Down30d int64 `json:"down30d"`
Up30d int64 `json:"up30d"`
DownTotal int64 `json:"downTotal"`
UpTotal int64 `json:"upTotal"`
Location *GeoInfo `json:"location"` // of the current or last endpoint
Online bool `json:"online"`
LastHandshake *time.Time `json:"lastHandshake"`
Endpoint string `json:"endpoint"`
Down24h int64 `json:"down24h"`
Up24h int64 `json:"up24h"`
Down30d int64 `json:"down30d"`
Up30d int64 `json:"up30d"`
DownTotal int64 `json:"downTotal"`
UpTotal int64 `json:"upTotal"`
Location *GeoInfo `json:"location"` // of the current or last endpoint
Latency *LatencyView `json:"latency"` // null = never pinged
}
func sumPoints(pts []Point) (down, up int64) {
@@ -386,6 +395,7 @@ func (s *Stats) Summary(id string) PeerSummary {
if cur := ps.openSession(); cur != nil && cur.Geo != nil && hostOf(cur.Endpoint) == hostOf(ps.Endpoint) {
out.Location = cur.Geo
}
out.Latency = s.latencyView(id, ps, time.Now())
}
if out.Location == nil && out.Endpoint != "" {
out.Location = s.geo.Lookup(out.Endpoint)