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#!/bin/bash

#
#   script: sdig (Supadig)
#   author: terrenceh (based on joec's checkdns)
#   description: digs up full existing DNS details on any valid domain
#                 + digs for entries in Google's public DNS w/ serial
#                 + digs for internal IMH/HUB NS & cluster A record entries w/ serial
#                 + a quick look at WHOIS
#   usage: sdig <domain.tld> [or]
#          sdig <email@domain.tld> [or]
#          sdig <http://hostname.tld/some/page.ext> [or]
#          sdig --about [or]
#          sdig --help
#

    VERSION=1.0

#
# info/usage
#

# header
    DisplayHeader(){
    # output:
        echo
        echo '                                      _ _       '
        echo '                                     | |_|      '
        echo '              ___ _  _ ____  ____  __| |_  ____ '
        echo '             / __| || |  _ \/ _  \/ _  | |/ _  \'
        echo '             \__ \ || | |_| ||_| | |_| | | |_| |'
        echo '             |___/___/| .__/\__/_|\____|_|\__  |'" $VERSION "
        echo '                      | |                  __| |'" Terrence H"
        echo '                      |_|                 |____/'
        echo
    }

# about
    DisplayInfo(){
    # output:
        echo
        echo "  SCRIPT: sdig (Supadig)"
        echo "  AUTHOR: Terrence H"
        echo "    DOES: Digs up full existing DNS details on any valid domain"
        echo "           + Digs for entries in Google's public DNS w/ serial"
        echo "           + Digs for internal IMH/HUB NS & cluster A record entries w/ serial"
        echo "           + A quick look at WHOIS"
    }

# usage
    DisplayUsage(){
    # output:
        echo
        echo "   USAGE: sdig <domain.tld> [or]"
        echo "          sdig <email@domain.tld> [or]"
        echo "          sdig <http://hostname.tld/some/page.ext> [or]"
        echo "          sdig --about [or]"
        echo "          sdig --help"
        echo
        echo
    }

#
# main functions
#

# global vars
    declare DOMAIN
    declare ROOT_DOMAIN
    declare ZONE
    declare SECTION="|----------------------------------------------------------------|"

# check if root domain and/or if has its own zone
    CheckIsRootDomain(){
    # task: dertermine domain level
        ROOT_DOMAIN=$(echo "$DOMAIN"|rev|cut -d\. -f1,2 -s|rev)
        ZONE=$(dig "$DOMAIN" ns +noall +nocmd +authority|awk {'print $1'}|grep "\."|sed 's/.$//')
        if [ -z "$ZONE" ]
        then
            ZONE="$DOMAIN"
        fi
        local dots=$(echo "$DOMAIN"|grep -o "\."|wc -l)
    # output: formatting
        echo
        echo -n "  $DOMAIN - "|tr "[:lower:]" "[:upper:]"
        if [ "$dots" -eq 1 ]
        then
            echo -e "2nd-level! (has 1 dot)\n$SECTION"
        elif [ "$dots" -eq 2 ]
        then
            echo -e "3rd-level! (has 2 dots)\n$SECTION"
        elif [ "$dots" -gt 2 ]
        then
            echo -e "NOT a root domain! (has $dots dots)\n$SECTION"
        fi
        echo "  Root Domain: $ROOT_DOMAIN"
        echo "         Zone: $ZONE"
        echo
    # cleanup root check
        unset dots
    }

# pull whois registrar and nameserver info (if available/results can be parsed)
    FetchWhois(){
    # task: get domains registrar, expiration date and current nameservers
        local whois_check=$(curl -s http://w.rkutil.us/"$ROOT_DOMAIN"_quick|grep -v "Status\|Domain details\|Admin\|Created:\|Changed:")
        local cant_parse=$(echo "$whois_check"|grep -o "unable to parse")
    # output: formatting
        echo
        echo -e "  CURRENT WHOIS\n$SECTION"
        echo "  Registration & Nameservers Only:"
    # error: no records found
        if [ -z "$whois_check" ]
        then
            echo "  $(tput setaf 1)No Records Found!$(tput sgr0)"
        else
        # error: cannot parse returned records
            if [ "$cant_parse" == "unable to parse" ]
            then
                echo "$(tput setaf 1)$whois_check$(tput sgr0)"|grep "Sorry, but I was unable to parse"|sed 's/^/     /'
                echo "     Please run a regular whois check. (ie. ~$ whois $DOMAIN)$(tput sgr0)"
            else
            # output: success
                echo "$whois_check"|sed 's/^/     /'
            fi
        fi
        echo
    # cleanup whois data
        unset ROOT_DOMAIN && unset whois_check && unset cant_parse
    }

# pull any/all publicly viewable zone records
    FetchVisibleZoneInfo(){
    # task: get visible zone data
        local zone_records=$(dig +nocmd "$DOMAIN" any +multiline +noall +answer)
        local records_avail=$(echo "$zone_records"|head -1)
    # output: formatting
        echo
        echo -e "  ZONE RECORDS (has propagated)\n$SECTION"
        echo "  Currently Visible:"
        if [ -z "$records_avail" ]
        then
        # error: no records found
            echo "     $(tput setaf 1)No Records Found!$(tput sgr0)"
        else
        # output: success
            echo "$zone_records"|sed 's/^/     /'|grep -v ";; Truncated"
        fi
        echo
    # cleanup visible zone data
        unset records_avail && unset zone_records
    }

# get where web traffic and mail go
    CheckWherePoints(){
    # task: get visible A and MX entries
        local where_it_points=$(dig +short $DOMAIN|grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
        local mx_records=$(dig +short mx "$DOMAIN"|sort -n|sed 's/^/MX: /')
        local mx_entry
        local mx_destination_ip
        if [ -z "$mx_records" ]
        then
            mx_records=$(dig +short mx "$ZONE"|sort -n|sed 's/^/MX: /')
        fi
        unset ZONE
    # error: no A or MX entries found
        if [[ -z "$where_it_points" && -z "$mx_records" ]]
        then
            echo
            echo -e "  WHERE WEB TRAFFIC GOES\n$SECTION"
            echo "  $(tput setaf 1)No Records Found!$(tput sgr0)"
            echo
            echo
            echo -e "  WHERE MAIL TRAFFIC GOES\n$SECTION"
            echo "  $(tput setaf 1)No Records Found!$(tput sgr0)"
        else
        # task: get reverse lookup and serials of found MX records
            echo
            echo -e "  WHERE WEB TRAFFIC GOES\n$SECTION"
            echo "  Active A Record(s):"
            while read -r this_ip
            do
                local get_hostname=$(host "$this_ip"|grep "pointer"|awk {'print $5'})
                for check_ptr in "$get_hostname"
                do
                # task: do we own this ip
                    local we_own_this
                    if $(whois "$this_ip"|grep -q "InMotion Hosting\|Web Hosting Hub")
                    then
                        we_own_this="\n\t     \xe2\x86\xb3 $(tput setaf 2)Points To Us!$(tput sgr0)\n"
                    else
                        we_own_this="\n\t     \xe2\x86\xb3 $(tput setaf 1)Is 3rd Party!$(tput sgr0)\n"
                    fi
                # output: a records and reverse lookup
                    if [ "$(echo "$check_ptr"|grep -o "\."|wc -l)" -gt 1 ]
                    then
                        local its_ptr=$(echo "$check_ptr"|sed 's/.$//')
                        echo -ne "A: $this_ip [ PTR:$(tput setaf 7) $its_ptr$(tput sgr0) ]"|sed 's/^/      /';
                        echo -e "$we_own_this"
                    else
                        echo -ne "A: $this_ip [ $(tput setaf 1)No PTR Configured$(tput sgr0) ]"|sed 's/^/      /';
                        echo -e "$we_own_this"
                    fi
                # cleanup this ip's ptr data
                    unset its_ptr && unset we_own_this
                done
            # cleanup this ip
                unset get_hostname && unset check_ptr && unset this_ip
        # read $where_it_points
            done << EOF
            $where_it_points
EOF
            echo
        # output: formatting
            echo
            echo -e "  WHERE MAIL TRAFFIC GOES\n$SECTION"
            echo "  Active MX Record(s):"
            if [ -z "$mx_records" ]
            then
            # error: no records found
                echo "     $(tput setaf 1)No Records Found!$(tput sgr0)"
            else
            # task: get reverse dns lookup and serials of found MX records
                local mx_hostname_ips=$(echo "$mx_records"|awk {'print $3'}|sed 's/.$//'|xargs dig +short)
                local mx_tmp=$(date +"%y%m%d%M%N")
                echo "$mx_records"|sed 's/.$//' > /tmp/.sdig.$mx_tmp.mxhosts
                echo "$mx_hostname_ips" > /tmp/.sdig.$mx_tmp.mxips
                while true
                do
                    read -r mx_entry <&3
                    read -r mx_destination_ip <&4
                    if [ -z "$mx_entry" -o -z "$mx_destination_ip" ]
                    then
                        break
                    fi
                    local this_ptr=$(host "$mx_destination_ip"|grep "pointer"|awk {'print $5'})
                # task: do we own this ip
                    local we_own_this
                    if $(whois "$mx_destination_ip"|grep -q "InMotion Hosting\|Web Hosting Hub")
                    then
                        we_own_this="\n\t     \xe2\x86\xb3 $(tput setaf 2)Points To Us!$(tput sgr0)\n"
                    else
                        we_own_this="\n\t     \xe2\x86\xb3 $(tput setaf 1)Is 3rd Party!$(tput sgr0)\n"
                    fi

                # output: mx data, and reverse lookup
                    if [ "$(echo "$this_ptr"|grep -o "\."|wc -l)" -gt 1 ]
                    then
                        local its_ptr=$(echo "$this_ptr"|sed 's/.$//')
                        echo -ne "     $mx_entry => $mx_destination_ip [ PTR:$(tput setaf 7) $its_ptr$(tput sgr0) ]"
                        echo -e "$we_own_this"
                    else
                        echo -ne "     $mx_entry => $mx_destination_ip [ $(tput setaf 1)No PTR Configured$(tput sgr0) ]"
                        echo -e "$we_own_this"
                    fi
            # read MX data
                done 3< /tmp/.sdig.$mx_tmp.mxhosts 4< /tmp/.sdig.$mx_tmp.mxips && rm -f /tmp/.sdig.$mx_tmp*
            # cleanup this MX's reverse lookup and serial data
                unset this_ptr && unset its_ptr && unset mx_entry && unset mx_destination_ip && unset we_own_this
            fi
        # cleanup this domain's MX data
            unset mx_records && unset mx_hostname_ips && unset mx_tmp
        fi
    # cleanup this domains record's ptr and serial data
        unset where_it_points
    }

# check google's public dns for propagated/cached entries (if exist) + serial of each
    CheckPublicDNS(){
    # output publicly viewable cached dns entries
        echo
        echo -e "  PUBLIC DNS (what presumably has propagated & been cached)\n$SECTION"
        echo "  Level3's Public DNS:"
        echo "$(FetchARecordsAndSerial a.resolvers.level3.net)"
        echo "$(FetchARecordsAndSerial b.resolvers.level3.net)"
        echo "$(FetchARecordsAndSerial c.resolvers.level3.net)"
        echo
        echo "  Google's Public DNS:"
        echo "$(FetchARecordsAndSerial google-public-dns-a.google.com)"
        echo "$(FetchARecordsAndSerial google-public-dns-b.google.com)"
    }

# check internal ns & clusters (both brands) for entries (if exist) + serial of each
    CheckInternalDNS(){
    # task: set internal brands
        local imh="inmotionhosting.com"
        local hub="webhostinghub.com"
    # output: found internal dns entries by brand
        echo
        echo -e "  INMOTION (in house)\n$SECTION"
        echo "  Nameservers:"
        echo " $(FetchARecordsAndSerial ns.$imh)"
        echo "$(FetchARecordsAndSerial ns2.$imh)"
        echo
        echo "  Clusters:"
        echo "$(FetchARecordsAndSerial wczcluster1.$imh)"
        echo "$(FetchARecordsAndSerial wczcluster2.$imh)"
        echo "$(FetchARecordsAndSerial wczcluster3.$imh)"
        echo "$(FetchARecordsAndSerial wczcluster4.$imh)"
        echo "$(FetchARecordsAndSerial wczcluster5.$imh)"
        echo
        echo
        echo -e "  HUB (in house)\n$SECTION"
        echo "  Nameservers:"
        echo "$(FetchARecordsAndSerial ns1.$hub)"
        echo "$(FetchARecordsAndSerial ns2.$hub)"
        echo
        echo "  Clusters:"
        echo "$(FetchARecordsAndSerial echzcluster1.$hub)"
        echo "$(FetchARecordsAndSerial wchzcluster2.$hub)"
        echo
    # cleanup internal brands
        unset imh && unset hub
    }

# fetch A record entries from the given DNS server...
    FetchARecordsAndSerial(){
    # task: get A records
        local server="$1"
        local a_records=$(dig +short $DOMAIN @$server|grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
    # error: none found
        if [ -z "$a_records" ]
        then
            if [ "$(echo "$server"|grep -o "\."|wc -l)" -gt 2 ]
            then
                echo -e "@$(echo "$server"|cut -d\. -f1,2): $(tput setaf 1)No Records Found!$(tput sgr0)\n"|sed 's/^/     /'
            else
                echo -e "@$(echo "$server"|cut -d\. -f1): $(tput setaf 1)No Records Found!$(tput sgr0)\n"|sed 's/^/     /'
            fi
        elif [ "$(echo "$a_records"|grep -o 'timed out')" == "timed out" ]
        then
            if [ "$(echo "$server"|grep -o "\."|wc -l)" -gt 2 ]
            then
                echo -e "@$(echo "$server"|cut -d\. -f1,2): $(tput setaf 1)Connection Timed Out!$(tput sgr0)\n"|sed 's/^/     /'
            else
                echo -e "@$(echo "$server"|cut -d\. -f1): $(tput setaf 1)Connection Timed Out!$(tput sgr0)\n"|sed 's/^/     /'
            fi
        else
        # task: get ptr and serials of found A records
            while read -r a_record
            do
                local this_ptr=$(host "$a_record"|grep "pointer"|awk {'print $5'})
                local this_serial=$(dig "$DOMAIN" @"$server" +nocmd any +multiline +noall +answer|grep -h serial|awk {'print $1'})
                if [ "$(echo "$this_serial"|wc -m)" -lt 10 ]
                then
                # error: serial cannot be found?
                    this_serial="$(tput setaf 1)The serial cannot be determined.$(tput sgr0)"
                else
                # output: success
                    this_serial="$(tput setaf 3)Serial: $this_serial$(tput sgr0)"
                fi
            # output: formatting
                if [ "$(echo "$this_ptr"|grep -o "\."|wc -l)" -gt 1 ]
                then
                    if [ "$(echo "$server"|grep -o "\."|wc -l)" -gt 2 ]
                    then
                        echo -e "@$(echo "$server"|cut -d\. -f1,2): $a_record [ PTR:$(tput setaf 7) $(echo "$this_ptr"|sed 's/.$//')$(tput sgr0) ] \n\t     \xe2\x86\xb3 $this_serial\n"|sed 's/^/     /'
                    else
                        echo -e "@$(echo "$server"|cut -d\. -f1): $a_record [ PTR:$(tput setaf 7) $(echo "$this_ptr"|sed 's/.$//')$(tput sgr0) ] \n\t     \xe2\x86\xb3 $this_serial\n"|sed 's/^/     /'
                    fi
                else
                    if [ "$(echo "$server"|grep -o "\."|wc -l)" -gt 2 ]
                    then
                        echo -e "@$(echo "$server"|cut -d\. -f1,2): $a_record [ $(tput setaf 1)No PTR Configured$(tput sgr0) ] \n\t     \xe2\x86\xb3 $this_serial\n"|sed 's/^/     /'
                    else
                        echo -e "@$(echo "$server"|cut -d\. -f1): $a_record [ $(tput setaf 1)No PTR Configured$(tput sgr0) ] \n\t     \xe2\x86\xb3 $this_serial\n"|sed 's/^/     /'
                    fi
                fi
            # cleanup this A record's ptr and serial data
                unset this_serial && unset this_ptr && unset a_record
        # read $a_records
            done << EOF
            $a_records
EOF
            unset a_records
        fi
    }

# dig it all up
    Supadig(){
    # output: instructions while in less
        echo
    # removed: Supadig|less -R (piping to less seems to confuse people ??? wow):
    #    echo " Hey!"
    #    echo -e "  \xe2\x86\xb3 Arrow keys to scroll"
    #    echo "    Press q to quit"
    #    echo "    Press h for more options"
        DisplayHeader
    # output: results of all dns data
        echo
        CheckIsRootDomain
        echo
        FetchWhois
        echo
        FetchVisibleZoneInfo
        echo
        CheckPublicDNS
        echo
        CheckWherePoints
        echo
        CheckInternalDNS
        echo
    # final cleanup
        unset DOMAIN
        unset SECTION
    }

#
# check input, validate and die on error [else] Supadig
#

# check for false input and display help
    if [[ -z "$1" || "$1" == "--help" ]]
    then
    # output: usage
        DisplayHeader && DisplayUsage
        exit 0
# display info
    elif [ "$1" == "--about" ]
    then
    # output: about/usage
        DisplayHeader && DisplayInfo && DisplayUsage
        exit 0
    else
    # user seems to not need help, but lets double check
        if [[ -n "$2" || "$(echo "$*"|grep -o "\."|wc -l)" == 0 || -z "$(echo "$*"|cut -d\. -f1)" ]]
        then
        # error: entry appears invalid
            DisplayHeader && echo -e "$(tput setaf 1)\n   ERROR!$(tput sgr0) \"$*\" is an invalid entry!" && DisplayUsage
            exit 1
        else
        # ok, input seems valid, but has an actual valid domain/tld been given?
            validated=$(echo "$*"|sed 's/http:\/\///'|sed 's/https:\/\///'|sed 's/ftp:\/\///'|sed 's/ftpes:\/\///'|cut -d@ -f2-|cut -d\/ -f1)
            confirm_tld=$(echo "$validated"|rev|cut -d\. -f1 -s|rev)
            declare -a valid_tlds=("ac" "ad" "ae" "aero" "af" "ag" "ai" "al" "am" "an" "ao" "aq" "ar" "arpa" "as" "asia" "at" "au" "aw" "ax"
                "az" "ba" "bb" "bd" "be" "bf" "bg" "bh" "bi" "biz" "bj" "bl" "bm" "bn" "bo" "br" "bs" "bt" "bv" "bw" "by" "bz" "ca" "cat" "cc"
                "cd" "cf" "cg" "ch" "ci" "ck" "cl" "cm" "cn" "co" "com" "coop" "cr" "cu" "cv" "cx" "cy" "cz" "de" "dj" "dk" "dm" "do" "dz" "ec"
                "edu" "ee" "eg" "eh" "er" "es" "et" "eu" "fi" "fj" "fk" "fm" "fo" "fr" "ga" "gb" "gd" "ge" "gf" "gg" "gh" "gi" "gl" "gm" "gn" "gov"
                "gp" "gq" "gr" "gs" "gt" "gu" "gw" "gy" "hk" "hm" "hn" "hr" "ht" "hu" "id" "ie" "il" "im" "in" "info" "int" "io" "iq" "ir" "is" "it"
                "je" "jm" "jo" "jobs" "jp" "ke" "kg" "kh" "ki" "km" "kn" "kp" "kr" "kw" "ky" "kz" "la" "lb" "lc" "li" "lk" "lr" "ls" "lt" "lu" "lv"
                "ly" "ma" "mc" "md" "me" "mf" "mg" "mh" "mil" "mk" "ml" "mm" "mn" "mo" "mobi" "mp" "mq" "mr" "ms" "mt" "mu" "museum" "mv" "mw" "mx"
                "my" "mz" "na" "name" "nc" "ne" "net" "nf" "ng" "ni" "nl" "no" "np" "nr" "nu" "nz" "om" "org" "pa" "pe" "pf" "pg" "ph" "pk" "pl" "pm"
                "pn" "pr" "pro" "ps" "pt" "pw" "py" "qa" "re" "ro" "rs" "ru" "rw" "sa" "sb" "sc" "sd" "se" "sg" "sh" "si" "sj" "sk" "sl" "sm" "sn"
                "so" "sr" "st" "su" "sv" "sy" "sz" "tc" "td" "tel" "tf" "tg" "th" "tj" "tk" "tl" "tm" "tn" "to" "tp" "tr" "travel" "tt" "tv" "tw"
                "tz" "ua" "ug" "uk" "um" "us" "uy" "uz" "va" "vc" "ve" "vg" "vi" "vn" "vu" "wf" "ws" "ye" "yt" "yu" "za" "zm" "zw")
        # task: validate given domain entry
            for valid_tld in "${valid_tlds[@]}"
            do
                if [ "$confirm_tld" == "$valid_tld" ]
                then
                    DOMAIN=$(echo "$validated")
                # cleanup tld validation
                    unset valid_tld && unset valid_tlds && unset confirm_tld && unset validated
                # task: supadig the domain
                    Supadig
                # removed: Supadig|less -R (piping to less seems to confuse people ??? wow)
                    exit 0
                fi
            done
        # error: domain appears invalid
            DisplayHeader && echo -e "\n   $(tput setaf 1)ERROR!$(tput sgr0) \"$*\" is an invalid domain!" && DisplayUsage
            exit 1
         fi
    fi

# eof