telegraf/plugins/inputs/ping/ping_windows.go

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// +build windows
2017-07-24 19:36:33 +00:00
package ping
import (
"errors"
"fmt"
"regexp"
"strconv"
"strings"
"github.com/influxdata/telegraf"
)
func (p *Ping) pingToURL(u string, acc telegraf.Accumulator) {
if p.Count < 1 {
p.Count = 1
}
tags := map[string]string{"url": u}
fields := map[string]interface{}{"result_code": 0}
args := p.args(u)
totalTimeout := 60.0
if len(p.Arguments) == 0 {
totalTimeout = p.timeout() * float64(p.Count)
}
out, err := p.pingHost(p.Binary, totalTimeout, args...)
// ping host return exitcode != 0 also when there was no response from host
// but command was execute successfully
var pendingError error
if err != nil {
// Combine go err + stderr output
pendingError = errors.New(strings.TrimSpace(out) + ", " + err.Error())
}
trans, recReply, receivePacket, avg, min, max, err := processPingOutput(out)
if err != nil {
// fatal error
if pendingError != nil {
acc.AddError(fmt.Errorf("%s: %s", pendingError, u))
} else {
acc.AddError(fmt.Errorf("%s: %s", err, u))
}
fields["result_code"] = 2
fields["errors"] = 100.0
acc.AddFields("ping", fields, tags)
return
}
// Calculate packet loss percentage
lossReply := float64(trans-recReply) / float64(trans) * 100.0
lossPackets := float64(trans-receivePacket) / float64(trans) * 100.0
fields["packets_transmitted"] = trans
fields["reply_received"] = recReply
fields["packets_received"] = receivePacket
fields["percent_packet_loss"] = lossPackets
fields["percent_reply_loss"] = lossReply
if avg >= 0 {
fields["average_response_ms"] = float64(avg)
}
if min >= 0 {
fields["minimum_response_ms"] = float64(min)
}
if max >= 0 {
fields["maximum_response_ms"] = float64(max)
}
acc.AddFields("ping", fields, tags)
}
// args returns the arguments for the 'ping' executable
func (p *Ping) args(url string) []string {
if len(p.Arguments) > 0 {
return p.Arguments
}
args := []string{"-n", strconv.Itoa(p.Count)}
if p.Timeout > 0 {
args = append(args, "-w", strconv.FormatFloat(p.Timeout*1000, 'f', 0, 64))
}
args = append(args, url)
return args
}
// processPingOutput takes in a string output from the ping command
// based on linux implementation but using regex ( multilanguage support )
// It returns (<transmitted packets>, <received reply>, <received packet>, <average response>, <min response>, <max response>)
func processPingOutput(out string) (int, int, int, int, int, int, error) {
// So find a line contain 3 numbers except reply lines
var stats, aproxs []string = nil, nil
err := errors.New("Fatal error processing ping output")
stat := regexp.MustCompile(`=\W*(\d+)\D*=\W*(\d+)\D*=\W*(\d+)`)
aprox := regexp.MustCompile(`=\W*(\d+)\D*ms\D*=\W*(\d+)\D*ms\D*=\W*(\d+)\D*ms`)
tttLine := regexp.MustCompile(`TTL=\d+`)
lines := strings.Split(out, "\n")
var receivedReply int = 0
for _, line := range lines {
if tttLine.MatchString(line) {
receivedReply++
} else {
if stats == nil {
stats = stat.FindStringSubmatch(line)
}
if stats != nil && aproxs == nil {
aproxs = aprox.FindStringSubmatch(line)
}
}
}
// stats data should contain 4 members: entireExpression + ( Send, Receive, Lost )
if len(stats) != 4 {
return 0, 0, 0, -1, -1, -1, err
}
trans, err := strconv.Atoi(stats[1])
if err != nil {
return 0, 0, 0, -1, -1, -1, err
}
receivedPacket, err := strconv.Atoi(stats[2])
if err != nil {
return 0, 0, 0, -1, -1, -1, err
}
// aproxs data should contain 4 members: entireExpression + ( min, max, avg )
if len(aproxs) != 4 {
return trans, receivedReply, receivedPacket, -1, -1, -1, err
}
min, err := strconv.Atoi(aproxs[1])
if err != nil {
return trans, receivedReply, receivedPacket, -1, -1, -1, err
}
max, err := strconv.Atoi(aproxs[2])
if err != nil {
return trans, receivedReply, receivedPacket, -1, -1, -1, err
}
avg, err := strconv.Atoi(aproxs[3])
if err != nil {
return 0, 0, 0, -1, -1, -1, err
}
return trans, receivedReply, receivedPacket, avg, min, max, err
}
func (p *Ping) timeout() float64 {
// According to MSDN, default ping timeout for windows is 4 second
// Add also one second interval
if p.Timeout > 0 {
return p.Timeout + 1
}
return 4 + 1
}