#! /usr/bin/env bash
set -e

# Ensure we were passed a host argument
if [ -z "$1" ]; then
    echo "Usage: $0 <host>"
    exit 1
fi

# Parse out the ASNs
asns=$( mtr -jzc1 -Z1 -G0.25 $1 | jq ".report.hubs[].ASN" | tr -d "\"" | uniq )

# For each line
for asn in $asns; do
    # Skip "AS???" lines
    if [[ $asn =~ ^AS\?\?\?$ ]]; then
        echo "Private Hop"
        continue
    fi    

    # Get the AS name
    as_name=$( whois -h whois.radb.net $asn | grep -i ^descr: | cut -d : -f 2- | grep -o -E '\S.*\S|\S' )

    # Print the ASN and AS name
    echo "$asn - $as_name"
done