Tracert

Tracert is a golang based traceroute tool.

Trace to destination using ip / url
Show a sorted list of delays between hops from highes delay to lowest
only works with IPv4

Technical Spec

This tool uses standard go libraries and developed using go 1.12.5 based on osX.

How to Compie

$ go build -o trace main.go models.go

How to use

$ trace -address www.example.com

Since This application is based on system calls you need to have root privileges to run it.

Usage

There are optional parameters you can pass:

Usage : trace -address=address/ip [-port=portnumber][-maxhops=hopnumber][-timeout=milliseconds][-retry=retriesnumber]
  -address string
    	Enter an URL or an IP e.g. www.google.com or 1.1.1.
  -maxhops int
    	Enter Maximum Hop for tracing (default 30)
  -port int
    	Enter a Port Number (default 33443)
  -retry int
    	Enter Number of Retries (default 3)
  -timeout int
    	Enter Timeout in Milliseconds (1000 = 1s) (default 1000)

Run Test

You need to have root privileges for running tests

$ sudo go test

General Idea

Traceroute sends packets with TTL values that gradually increase from packet to packet, starting with TTL value of one. Routers decrement TTL values of packets by one when routing and discard packets whose TTL value has reached zero(https://en.wikipedia.org/wiki/Traceroute).
Instead of checking ICMP echo type we only rely on destination IP address, if the destination IP address we reached was the one we have requested we've reached the desired destination.