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// SPDX-License-Identifier: GPL-3.0-or-later
package wireguard
import (
"fmt"
"time"
"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
)
func (w *WireGuard) collect() (map[string]int64, error) {
if w.client == nil {
client, err := w.newWGClient()
if err != nil {
return nil, fmt.Errorf("creating WireGuard client: %v", err)
}
w.client = client
}
// TODO: probably we need to get a list of interfaces and query interfaces using client.Device()
// https://github.com/WireGuard/wgctrl-go/blob/3d4a969bb56bb6931f6661af606bc9c4195b4249/internal/wglinux/client_linux.go#L79-L80
devices, err := w.client.Devices()
if err != nil {
return nil, fmt.Errorf("retrieving WireGuard devices: %v", err)
}
if len(devices) == 0 {
w.Info("no WireGuard devices found on the host system")
}
now := time.Now()
if w.cleanupLastTime.IsZero() {
w.cleanupLastTime = now
}
mx := make(map[string]int64)
w.collectDevicesPeers(mx, devices, now)
if now.Sub(w.cleanupLastTime) > w.cleanupEvery {
w.cleanupLastTime = now
w.cleanupDevicesPeers(devices)
}
return mx, nil
}
func (w *WireGuard) collectDevicesPeers(mx map[string]int64, devices []*wgtypes.Device, now time.Time) {
for _, d := range devices {
if !w.devices[d.Name] {
w.devices[d.Name] = true
w.addNewDeviceCharts(d.Name)
}
mx["device_"+d.Name+"_peers"] = int64(len(d.Peers))
if len(d.Peers) == 0 {
mx["device_"+d.Name+"_receive"] = 0
mx["device_"+d.Name+"_transmit"] = 0
continue
}
for _, p := range d.Peers {
if p.LastHandshakeTime.IsZero() {
continue
}
pubKey := p.PublicKey.String()
id := peerID(d.Name, pubKey)
if !w.peers[id] {
w.peers[id] = true
w.addNewPeerCharts(id, d.Name, pubKey)
}
mx["device_"+d.Name+"_receive"] += p.ReceiveBytes
mx["device_"+d.Name+"_transmit"] += p.TransmitBytes
mx["peer_"+id+"_receive"] = p.ReceiveBytes
mx["peer_"+id+"_transmit"] = p.TransmitBytes
mx["peer_"+id+"_latest_handshake_ago"] = int64(now.Sub(p.LastHandshakeTime).Seconds())
}
}
}
func (w *WireGuard) cleanupDevicesPeers(devices []*wgtypes.Device) {
seenDevices, seenPeers := make(map[string]bool), make(map[string]bool)
for _, d := range devices {
seenDevices[d.Name] = true
for _, p := range d.Peers {
seenPeers[peerID(d.Name, p.PublicKey.String())] = true
}
}
for d := range w.devices {
if !seenDevices[d] {
delete(w.devices, d)
w.removeDeviceCharts(d)
}
}
for p := range w.peers {
if !seenPeers[p] {
delete(w.peers, p)
w.removePeerCharts(p)
}
}
}
func peerID(device, peerPublicKey string) string {
return device + "_" + peerPublicKey
}
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