| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package ntpd |
| 4 | |
| 5 | import ( |
| 6 | "fmt" |
| 7 | "net/netip" |
| 8 | "strconv" |
| 9 | "time" |
| 10 | ) |
| 11 | |
| 12 | const ( |
| 13 | precision = 1000000 |
| 14 | ) |
| 15 | |
| 16 | func (c *Collector) collect() (map[string]int64, error) { |
| 17 | if c.client == nil { |
| 18 | client, err := c.newClient(c.Config) |
| 19 | if err != nil { |
| 20 | return nil, fmt.Errorf("creating NTP client: %v", err) |
| 21 | } |
| 22 | c.client = client |
| 23 | } |
| 24 | |
| 25 | mx := make(map[string]int64) |
| 26 | |
| 27 | if err := c.collectInfo(mx); err != nil { |
| 28 | return nil, err |
| 29 | } |
| 30 | |
| 31 | if c.CollectPeers { |
| 32 | if now := time.Now(); now.Sub(c.findPeersTime) > c.findPeersEvery { |
| 33 | c.findPeersTime = now |
| 34 | if err := c.findPeers(); err != nil { |
| 35 | c.Warning(err) |
| 36 | } |
| 37 | } |
| 38 | c.collectPeersInfo(mx) |
| 39 | } |
| 40 | |
| 41 | return mx, nil |
| 42 | } |
| 43 | |
| 44 | func (c *Collector) collectInfo(mx map[string]int64) error { |
| 45 | info, err := c.client.systemInfo() |
| 46 | if err != nil { |
| 47 | return fmt.Errorf("error on querying system info: %v", err) |
| 48 | } |
| 49 | |
| 50 | for k, v := range info { |
| 51 | switch k { |
| 52 | case |
| 53 | "offset", |
| 54 | "sys_jitter", |
| 55 | "clk_jitter", |
| 56 | "frequency", |
| 57 | "clk_wander", |
| 58 | "rootdelay", |
| 59 | "rootdisp", |
| 60 | "stratum", |
| 61 | "tc", |
| 62 | "mintc", |
| 63 | "precision": |
| 64 | if val, err := strconv.ParseFloat(v, 64); err == nil { |
| 65 | mx[k] = int64(val * precision) |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | return nil |
| 70 | } |
| 71 | |
| 72 | func (c *Collector) collectPeersInfo(mx map[string]int64) { |
| 73 | for _, id := range c.peerIDs { |
| 74 | info, err := c.client.peerInfo(id) |
| 75 | if err != nil { |
| 76 | c.Warningf("error on querying NTP peer info id='%d': %v", id, err) |
| 77 | continue |
| 78 | } |
| 79 | |
| 80 | addr, ok := info["srcadr"] |
| 81 | if !ok { |
| 82 | continue |
| 83 | } |
| 84 | |
| 85 | for k, v := range info { |
| 86 | switch k { |
| 87 | case |
| 88 | "offset", |
| 89 | "delay", |
| 90 | "dispersion", |
| 91 | "jitter", |
| 92 | "xleave", |
| 93 | "rootdelay", |
| 94 | "rootdisp", |
| 95 | "stratum", |
| 96 | "hmode", |
| 97 | "pmode", |
| 98 | "hpoll", |
| 99 | "ppoll", |
| 100 | "precision": |
| 101 | if val, err := strconv.ParseFloat(v, 64); err == nil { |
| 102 | mx["peer_"+addr+"_"+k] = int64(val * precision) |
| 103 | } |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | func (c *Collector) findPeers() error { |
| 110 | c.peerIDs = c.peerIDs[:0] |
| 111 | |
| 112 | c.Debug("querying NTP peers") |
| 113 | peers, err := c.client.peerIDs() |
| 114 | if err != nil { |
| 115 | return fmt.Errorf("querying NTP peers: %v", err) |
| 116 | } |
| 117 | |
| 118 | c.Debugf("found %d NTP peers (ids: %v)", len(peers), peers) |
| 119 | seen := make(map[string]bool) |
| 120 | |
| 121 | for _, id := range peers { |
| 122 | info, err := c.client.peerInfo(id) |
| 123 | if err != nil { |
| 124 | c.Debugf("error on querying NTP peer info id='%d': %v", id, err) |
| 125 | continue |
| 126 | } |
| 127 | |
| 128 | srcAddr, ok := info["srcadr"] |
| 129 | addr, err := netip.ParseAddr(srcAddr) |
| 130 | |
| 131 | if !ok || err != nil || !addr.IsValid() || c.peerIPAddrFilter.Contains(addr) { |
| 132 | c.Debugf("skipping NTP peer id='%d', srcadr='%s'", id, addr) |
| 133 | continue |
| 134 | } |
| 135 | |
| 136 | seen[addr.String()] = true |
| 137 | |
| 138 | if !c.peerAddr[addr.String()] { |
| 139 | c.peerAddr[addr.String()] = true |
| 140 | c.Debugf("new NTP peer id='%d', srcadr='%s': creating charts", id, addr) |
| 141 | c.addPeerCharts(addr.String()) |
| 142 | } |
| 143 | |
| 144 | c.peerIDs = append(c.peerIDs, id) |
| 145 | } |
| 146 | |
| 147 | for addr := range c.peerAddr { |
| 148 | if !seen[addr] { |
| 149 | delete(c.peerAddr, addr) |
| 150 | c.Debugf("stale NTP peer srcadr='%s': removing charts", addr) |
| 151 | c.removePeerCharts(addr) |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | return nil |
| 156 | } |