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// SPDX-License-Identifier: GPL-3.0-or-later
package ntpd
import (
"fmt"
"net"
"strconv"
"time"
)
const (
precision = 1000000
)
func (n *NTPd) collect() (map[string]int64, error) {
if n.client == nil {
client, err := n.newClient(n.Config)
if err != nil {
return nil, fmt.Errorf("creating NTP client: %v", err)
}
n.client = client
}
mx := make(map[string]int64)
if err := n.collectInfo(mx); err != nil {
return nil, err
}
if n.CollectPeers {
if now := time.Now(); now.Sub(n.findPeersTime) > n.findPeersEvery {
n.findPeersTime = now
if err := n.findPeers(); err != nil {
n.Warning(err)
}
}
n.collectPeersInfo(mx)
}
return mx, nil
}
func (n *NTPd) collectInfo(mx map[string]int64) error {
info, err := n.client.systemInfo()
if err != nil {
return fmt.Errorf("error on querying system info: %v", err)
}
for k, v := range info {
switch k {
case
"offset",
"sys_jitter",
"clk_jitter",
"frequency",
"clk_wander",
"rootdelay",
"rootdisp",
"stratum",
"tc",
"mintc",
"precision":
if val, err := strconv.ParseFloat(v, 64); err == nil {
mx[k] = int64(val * precision)
}
}
}
return nil
}
func (n *NTPd) collectPeersInfo(mx map[string]int64) {
for _, id := range n.peerIDs {
info, err := n.client.peerInfo(id)
if err != nil {
n.Warningf("error on querying NTP peer info id='%d': %v", id, err)
continue
}
addr, ok := info["srcadr"]
if !ok {
continue
}
for k, v := range info {
switch k {
case
"offset",
"delay",
"dispersion",
"jitter",
"xleave",
"rootdelay",
"rootdisp",
"stratum",
"hmode",
"pmode",
"hpoll",
"ppoll",
"precision":
if val, err := strconv.ParseFloat(v, 64); err == nil {
mx["peer_"+addr+"_"+k] = int64(val * precision)
}
}
}
}
}
func (n *NTPd) findPeers() error {
n.peerIDs = n.peerIDs[:0]
n.Debug("querying NTP peers")
peers, err := n.client.peerIDs()
if err != nil {
return fmt.Errorf("querying NTP peers: %v", err)
}
n.Debugf("found %d NTP peers (ids: %v)", len(peers), peers)
seen := make(map[string]bool)
for _, id := range peers {
info, err := n.client.peerInfo(id)
if err != nil {
n.Debugf("error on querying NTP peer info id='%d': %v", id, err)
continue
}
addr, ok := info["srcadr"]
if ip := net.ParseIP(addr); !ok || ip == nil || n.peerIPAddrFilter.Contains(ip) {
n.Debugf("skipping NTP peer id='%d', srcadr='%s'", id, addr)
continue
}
seen[addr] = true
if !n.peerAddr[addr] {
n.peerAddr[addr] = true
n.Debugf("new NTP peer id='%d', srcadr='%s': creating charts", id, addr)
n.addPeerCharts(addr)
}
n.peerIDs = append(n.peerIDs, id)
}
for addr := range n.peerAddr {
if !seen[addr] {
delete(n.peerAddr, addr)
n.Debugf("stale NTP peer srcadr='%s': removing charts", addr)
n.removePeerCharts(addr)
}
}
return nil
}
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