| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package portcheck |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "fmt" |
| 8 | "net" |
| 9 | "strconv" |
| 10 | "strings" |
| 11 | "sync" |
| 12 | "time" |
| 13 | ) |
| 14 | |
| 15 | func (c *Collector) collect() (map[string]int64, error) { |
| 16 | wg := &sync.WaitGroup{} |
| 17 | |
| 18 | for _, port := range c.tcpPorts { |
| 19 | wg.Add(1) |
| 20 | port := port |
| 21 | go func() { defer wg.Done(); c.checkTCPPort(port) }() |
| 22 | } |
| 23 | |
| 24 | if c.doUdpPorts { |
| 25 | for _, port := range c.udpPorts { |
| 26 | wg.Add(1) |
| 27 | port := port |
| 28 | go func() { defer wg.Done(); c.checkUDPPort(port) }() |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | wg.Wait() |
| 33 | |
| 34 | mx := make(map[string]int64) |
| 35 | |
| 36 | now := time.Now() |
| 37 | |
| 38 | for _, p := range c.tcpPorts { |
| 39 | if !c.seenTcpPorts[p.number] { |
| 40 | c.seenTcpPorts[p.number] = true |
| 41 | c.addTCPPortCharts(p) |
| 42 | } |
| 43 | |
| 44 | px := fmt.Sprintf("tcp_port_%d_", p.number) |
| 45 | |
| 46 | mx[px+"current_state_duration"] = int64(now.Sub(p.statusChangeTs).Seconds()) |
| 47 | mx[px+"latency"] = int64(p.latency) |
| 48 | mx[px+tcpPortCheckStateSuccess] = 0 |
| 49 | mx[px+tcpPortCheckStateTimeout] = 0 |
| 50 | mx[px+tcpPortCheckStateFailed] = 0 |
| 51 | mx[px+p.status] = 1 |
| 52 | } |
| 53 | |
| 54 | if c.doUdpPorts { |
| 55 | for _, p := range c.udpPorts { |
| 56 | if p.err != nil { |
| 57 | if isListenOpNotPermittedError(p.err) { |
| 58 | c.doUdpPorts = false |
| 59 | break |
| 60 | } |
| 61 | continue |
| 62 | } |
| 63 | |
| 64 | if !c.seenUdpPorts[p.number] { |
| 65 | c.seenUdpPorts[p.number] = true |
| 66 | c.addUDPPortCharts(p) |
| 67 | } |
| 68 | |
| 69 | px := fmt.Sprintf("udp_port_%d_", p.number) |
| 70 | |
| 71 | mx[px+"current_status_duration"] = int64(now.Sub(p.statusChangeTs).Seconds()) |
| 72 | mx[px+udpPortCheckStateOpenFiltered] = 0 |
| 73 | mx[px+udpPortCheckStateClosed] = 0 |
| 74 | mx[px+p.status] = 1 |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | return mx, nil |
| 79 | } |
| 80 | |
| 81 | func (c *Collector) address(port int) string { |
| 82 | // net.JoinHostPort expects literal IPv6 address, it adds [] |
| 83 | host := strings.Trim(c.Host, "[]") |
| 84 | return net.JoinHostPort(host, strconv.Itoa(port)) |
| 85 | } |
| 86 | |
| 87 | func durationToMs(duration time.Duration) int { |
| 88 | return int(duration) / (int(time.Millisecond) / int(time.Nanosecond)) |
| 89 | } |
| 90 | |
| 91 | func isListenOpNotPermittedError(err error) bool { |
| 92 | // icmp.ListenPacket failed (socket: operation not permitted) |
| 93 | var opErr *net.OpError |
| 94 | return errors.As(err, &opErr) && |
| 95 | opErr.Op == "listen" && |
| 96 | strings.Contains(opErr.Error(), "operation not permitted") |
| 97 | } |