whoisvn.sh

whoisvn.sh

#!/bin/bash

# Purpose:  Test if a domain was registered
# Author:   KyAnh <[email protected]>
# License:  GPL v2
# Home:     http://viettug.org/wiki/fs/whoisvn
# Source:   http://github.com/icy/whoisvn

# default suffixes
WHOISVN_SUFFIX=${WHOISVN_SUFFIX:-com net org info edu biz}

########################################################################

# donot change these variables
_REGISTERED=0
_AVAILABLE=1

# user agent passed to `curl`
_USER_AGENT="Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0) FreeSoft/whoisvn"
_VERBOSE=0
_DNSSERVERS=""

# message function
_msg() {
  echo $*
}

_help() {
  cat <<EOF
DESCRIPTION

  Purpose:  Quick test if some domain does exist
  Author:   kyanh <[email protected]>
  Homepage: http://github.com/icy/whoisvn/
  License:  GPL v2

EXAMPLE

  $ $(basename $0)    example.net
  $ $(basename $0)    example.*
  $ $(basename $0) -G example.net example.com
  $ WHOISVN_SUFFIX="com net" $(basename $0) example

OPTIONS

  -O  --opendns     use "dig ns @208.67.220.220" (default)
  -G  --googledns   use "dig ns @8.8.8.8"
  -s  --dns <ip>    use <ip> as DNS server
  -a  --all         use all known DNS servers
  -h  --help        print this message

  Any option can be used multiple times.

ENVIRONMENT

  WHOISVN_SUFFIX  List of domain suffixes.
                  Defaults: $WHOISVN_SUFFIX

REQUIREMENTS

  curl, dig, grep

HOW IT WORKS

  The original version of this script sends some special queries to
  some domain providers to check if that domain does exist. The result
  may be slow and unreliable as the domain provider may change their
  internal code.

  This version uses a simple method: It queries some popular DNS servers
  for the 'ns' entries of a domain. Normally such entries should exist
  if the domain is registered. For example

    $ dig ns @208.67.222.222 google.com | grep NS
    google.com.             170335  IN      NS      ns2.google.com.
    google.com.             170335  IN      NS      ns1.google.com.
    google.com.             170335  IN      NS      ns3.google.com.
    google.com.             170335  IN      NS      ns4.google.com.

KNOWN PROBLEMS

  The domain 'google.xxx' is marked as registered by OpenDNS, but Google
  DNS server knows nothing about it.

HISTORY

  This script was to support .vn suffix. That's why the script has "vn"
  in its name. However, the recent versions can work with any kind of
  domains. The name still remains as a history portion.
EOF
  return 0;
}

_test_programs() {
  for _p in curl dig grep; do
    which $_p 2>/dev/null 1>&2
    [ $? -ge 1 ] && (_msg "$_p not found"; exit 127)
  done
}

########################################################################
# look up functions
########################################################################

# report the result
lookup_report() {
  if [ "x$1" == "x$2" ]; then
    _msg -e "\tregistered"
  else
    _msg -e "\tavailable"
  fi
}

# to VNNIC: could you support external lookup?
lookup_by_vnnic() {
  _msg "vnnic doesnot support external lookup"
  return 1
}

# http://fibo.com.vn/
lookup_by_fibo() {
  _msg "fibo support is obsolete"
  return 1
}

# http://matbao.net/
lookup_by_matbao() {
  _msg "matbao support is obsolete"
  return 1
}

# http://pavietnam.com.vn/
# http://pavietnam.vn/vn/whois.php?domain=yahoo.biz&t=1291981524874
lookup_by_pavietnam() {
  _msg "PAVietnam support is obsolete since Feb 1st 2012"
  return 1
}

lookup_by_opendns() {
  local domain="$1"
  local _registered=0
  printf "%15s: %20s " "opendns.org" "${domain}"
  dig ns @208.67.220.220 ${domain} 2>&1 \
    | grep -qE -- "^${domain}.+NS+"
  [ $? -eq 0 ] && _registered=1
  lookup_report $_registered $_AVAILABLE
}

lookup_by_googledns() {
  local domain="$1"
  local _registered=0
  printf "%15s: %20s " "googledns" "${domain}"
  dig ns @8.8.8.8 ${domain} 2>&1 \
    | grep -qE -- "^${domain}.+NS+"
  [ $? -eq 0 ] && _registered=1
  lookup_report $_registered $_AVAILABLE
}

lookup_by_anydns() {
  local _server="$1"
  shift
  local domain="$1"
  local _registered=0
  printf "%15s: %20s " "$_server" "${domain}"
  dig ns @$_server ${domain} 2>&1 \
    | grep -qE "^${domain}.+NS+"
  [ $? -eq 0 ] && _registered=1
  lookup_report $_registered $_AVAILABLE
}

########################################################################
# main routine
########################################################################

_test_programs # or exit

if [ -z "$1" ]; then
  _msg "You need to provide some domain(s). Try $0 --help for details."
  exit 0
fi

# parameters processing

services=""
domaines=""

while [ ! -z "$1" ]; do
  case $1 in
     --pavietnam)  services="$services pavietnam" ;;
     --matbao)     services="$services matbao" ;;
  -O|--opendns)    services="$services opendns" ;;
  -G|--googledns)  services="$services googledns" ;;
  -a|--all)        services="$services opendns googledns" ;;
  -h|--help)       _help ; exit 0 ;;

  -s|--dns)        shift; \
                    [ ! -z "$1" ] \
                      && _DNSSERVERS="${_DNSSERVERS} $1" ;;

  -v|--verbose)    export _VERBOSE=1 ;;
  *)                [ ! "${1:0:1}" = "-" ] \
                      && domains="$domains $1" ;;
  esac
  shift
done

[ -z "$services" ] && [ -z "$_DNSSERVERS" ] && services="opendns"
[ -z "$domains" ]  && _help # and exit

last_names="$WHOISVN_SUFFIX"

for domain in $domains; do
  echo $domain | grep -q '\.'
  if [ $? -ge 1 ]; then
    domain="$domain."'*'
  fi
  if [ "x${domain:0 -2}" == 'x.*' ]; then
    domains=""
    for dtd in $last_names; do
      domains="${domains} ${domain%.*}.${dtd}"
    done
  else
    domains="${domain}"
  fi
  for domain in $domains; do
    for s in ${services}; do
      lookup_by_${s} "${domain}"
    done
    for _dns in $_DNSSERVERS; do
      lookup_by_anydns $_dns "${domain}"
    done
  done
done

# end of file #