83 lines
2.4 KiB
Markdown
83 lines
2.4 KiB
Markdown
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# go-ping
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[](https://godoc.org/github.com/sparrc/go-ping)
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[](https://circleci.com/gh/sparrc/go-ping)
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ICMP Ping library for Go, inspired by
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[go-fastping](https://github.com/tatsushid/go-fastping)
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Here is a very simple example that sends & receives 3 packets:
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```go
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pinger, err := ping.NewPinger("www.google.com")
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if err != nil {
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panic(err)
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}
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pinger.Count = 3
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pinger.Run() // blocks until finished
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stats := pinger.Statistics() // get send/receive/rtt stats
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```
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Here is an example that emulates the unix ping command:
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```go
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pinger, err := ping.NewPinger("www.google.com")
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if err != nil {
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panic(err)
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}
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pinger.OnRecv = func(pkt *ping.Packet) {
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fmt.Printf("%d bytes from %s: icmp_seq=%d time=%v\n",
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pkt.Nbytes, pkt.IPAddr, pkt.Seq, pkt.Rtt)
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}
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pinger.OnFinish = func(stats *ping.Statistics) {
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fmt.Printf("\n--- %s ping statistics ---\n", stats.Addr)
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fmt.Printf("%d packets transmitted, %d packets received, %v%% packet loss\n",
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stats.PacketsSent, stats.PacketsRecv, stats.PacketLoss)
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fmt.Printf("round-trip min/avg/max/stddev = %v/%v/%v/%v\n",
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stats.MinRtt, stats.AvgRtt, stats.MaxRtt, stats.StdDevRtt)
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}
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fmt.Printf("PING %s (%s):\n", pinger.Addr(), pinger.IPAddr())
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pinger.Run()
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```
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It sends ICMP packet(s) and waits for a response. If it receives a response,
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it calls the "receive" callback. When it's finished, it calls the "finish"
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callback.
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For a full ping example, see
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[cmd/ping/ping.go](https://github.com/sparrc/go-ping/blob/master/cmd/ping/ping.go)
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## Installation:
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```
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go get github.com/sparrc/go-ping
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```
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To install the native Go ping executable:
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```bash
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go get github.com/sparrc/go-ping/...
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$GOPATH/bin/ping
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```
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## Note on Linux Support:
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This library attempts to send an
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"unprivileged" ping via UDP. On linux, this must be enabled by setting
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```
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sudo sysctl -w net.ipv4.ping_group_range="0 2147483647"
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```
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If you do not wish to do this, you can set `pinger.SetPrivileged(true)` and
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use setcap to allow your binary using go-ping to bind to raw sockets
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(or just run as super-user):
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```
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setcap cap_net_raw=+ep /bin/goping-binary
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```
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See [this blog](https://sturmflut.github.io/linux/ubuntu/2015/01/17/unprivileged-icmp-sockets-on-linux/)
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and [the Go icmp library](https://godoc.org/golang.org/x/net/icmp) for more details.
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