svn/view/checkmx.bash

#!/bin/bash
set -e

debug=1

ehlo=pro5s2.nethence.com
#ehlo=`curl -s ip.nethence.com | sed -n 1p | awk '{print $NF}' | sed 's/\.$//'`
echo using $ehlo as EHLO

sep="sed ':a;s/\B[0-9]\{3\}\>/,&/;ta'"

function checkmx {
        #so far we only take first MX without attemping to query DANE for backup ones
        primary=`host -4 -t MX $domain | sort --numeric-sort | head -1 | awk '{print $NF}'`
        primary=${primary%\.}

        #has no MX record
        if [[ $primary = record ]]; then
                (( debug == 1 )) && echo -e $domain\\tnomx
        elif [[ $primary = "3(NXDOMAIN)" ]]; then
                (( debug == 1 )) && echo -e $domain\\tnxdomain
        elif [[ $primary = "2(SERVFAIL)" ]]; then
                (( debug == 1 )) && echo -e $domain\\tservfail
        #;; connection timed out; no servers could be reached
        elif [[ $primary = "reached" ]]; then
                (( debug == 1 )) && echo -e $domain\\ttimeout
        elif [[ $domain = $primary ]]; then
                echo -e $domain\\tmx $primary equals-mx
        else
                ip=`host $domain | awk '{print $NF}'`
                primaryip=`host $primary | awk '{print $NF}'`
                if [[ $ip = $primaryip ]]; then
                        echo -e $domain\\tmx $primary but-same-ip
                else
                        echo -e $domain\\tmx $primary
                fi
                unset ip primaryip
        fi
        unset primary
}

function parselist {
        [[ -z $1 ]] && echo error function $0 requires file argument && exit 1
        [[ ! -r $1 ]] && echo error function $0 cannot read file $1 && exit 1

        echo writing to $1.mx ...
        for domain in `cat $1`; do
                checkmx
        done > $1.mx && echo wrote to $1.mx; unset domain
}

echo -n entering domains/mx/ ...
mkdir -p domains/mx/
cd domains/mx/ && echo done

echo -n splitting ptr.unique.nomadness.unique into 22 files...
split -a2 -d -nl/22 ../domains.unique domains.unique && echo done

#TODO also check PTR FQDNs ptr.unique.nomadness[0-9][0-9]
#for input in ptr.unique.nomadness06.domains; do
#for input in domains.unique[0-9][0-9]; do
for input in domains.unique.moar; do
        parselist $input &
done; unset input
jobs
cat <<EOF

watch with

        ps auxfww | grep checkmx
        tail -F domains/mx/*.mx
        watch ls -lF domains/mx/*.mx

EOF
time wait

echo -n merging defined MX from \*.mx into mx ...
cut -f2 *.mx | grep -E '^mx ' | awk '{print $2}' > mx && echo done
wc -l mx | eval $sep

#used fix on first shot (we did not use 'mx ' for equals and sameip)
#grep --no-filename equals-mx$ *.mx | awk '{print $1}' > mx.equals-mx
#grep --no-filename but-same-ip$ *.mx | awk '{print $2}' > mx.but-same-ip
#cat mx.equals-mx mx.but-same-ip >> mx

echo -n unique into mx.unique ...
sort --version-sort -u mx > mx.unique && echo done
wc -l mx.unique | eval $sep

#TODO 2/3rd-level vs all
