/
ping.go
65 lines (56 loc) · 1.35 KB
/
ping.go
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// Copyright © 2015-2016 Platina Systems, Inc. All rights reserved.
// Use of this source code is governed by the GPL-2 license described in the
// LICENSE file.
package ping
import (
"fmt"
"net"
"syscall"
"time"
"github.com/platinasystems/go/goes/lang"
"github.com/tatsushid/go-fastping"
)
type Command struct{}
func (Command) String() string { return "ping" }
func (Command) Usage() string {
return "ping DESTINATION"
}
func (Command) Apropos() lang.Alt {
return lang.Alt{
lang.EnUS: "send ICMP ECHO_REQUEST to network host",
}
}
func (Command) Man() lang.Alt {
return lang.Alt{
lang.EnUS: `
DESCRIPTION
Send ICMP ECHO_REQUEST to given host and print ECHO_REPLY.`,
}
}
func (Command) Main(args ...string) error {
if n := len(args); n == 0 {
return fmt.Errorf("DESTINATION: missing")
} else if n > 1 {
return fmt.Errorf("%v: unexpected", args[1:])
}
dest := args[0]
pinger := fastping.NewPinger()
pinger.Size = 64
da, err := net.ResolveIPAddr("ip4:icmp", dest)
if err != nil {
return err
}
err = syscall.ETIMEDOUT
pinger.AddIPAddr(da)
pinger.OnRecv = func(addr *net.IPAddr, rtt time.Duration) {
fmt.Printf("%d bytes from %s in %s\n",
pinger.Size, addr.String(), rtt.String())
err = nil
}
pinger.OnIdle = func() {}
fmt.Printf("PING %s (%s)\n", dest, da.String())
if rerr := pinger.Run(); err == nil {
err = rerr
}
return err
}