Tracer

Network diagnostic tool in Go inspired by Traceroute.

Makes UDP call to target host increasing the TTL(hops) of IP packet and recording the ICMP response for each hop(router address) until it finally reaches the destination or max TTL is reached.

Usage

1. CLI

go install github.com/nirdosh17/tracer/cmd/gotrace@latest

You can find the binaries HERE.

Commands:

# trace route to a host
gotrace example.com

# with options (max hops, timeout, retries)
gotrace route -hops 5 -t 5 -r 5 example.com

# get your public ip
gotrace myip

Get your public IP:

$ gotrace myip
+----------+----------------------------------------+
| IPv4     | 101.129.138.66                         |
| IPv6     | 2404:7c00:41:50ce:755f:69d3:c890:604b  |
| Location | TELIANET (United States)               |
+----------+----------------------------------------+

# just get ipv4
$ gotrace myip --ipv4
101.129.138.66

Trace route:

$ gotrace route example.com
tracing example.com (93.184.215.14), 64 hops max, max retries: 2
1.   192.168.101.1    private range    3.709ms
2.   62.115.42.118    Arelion Sweden AB (Germany)    172.783ms
3.   62.115.124.56    TELIANET (France)    193.725ms
4.   62.115.112.242    TELIANET (United States)    285.389ms
5.   62.115.123.125    TELIANET (United States)    288.032ms
6.   213.248.83.119    Arelion Sweden AB (United States)    261.788ms
7.   152.195.65.153    Edgecast Inc. (United States)    581.99ms
8.   93.184.215.14    Edgecast Inc. (United Kingdom)    286.464ms

2. Package

Install Package:

go get github.com/nirdosh17/tracer

package main

import (
  "fmt"
  "sync"

  "github.com/nirdosh17/tracer"
)

func main() {
  host := "example.com"

  var wg sync.WaitGroup
  wg.Add(1)
  c := make(chan tracer.Hop)
  go liveReader(&wg, c)

  t := tracer.NewTracer(tracer.NewConfig())
  _, err := t.Run(host, c)
  if err != nil {
    fmt.Println("trace err: ", err)
  }
  wg.Wait()
}

// read live hops from channel
func liveReader(wg *sync.WaitGroup, c chan tracer.Hop) {
  for {
    hop, ok := <-c
    // channel closed
    if !ok {
      wg.Done()
      return
    }
    fmt.Printf("%v.   %v    %v    %v\n", hop.TTL, hop.Addr, hop.Location, hop.ElapsedTime)
  }
}