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doh-lookup.sh
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#!/bin/sh
# doh-lookup - retrieve IPv4/IPv6 addresses via dig from a given domain list
# and write the adjusted output to separate lists (IPv4/IPv6 addresses plus domains)
# Copyright (c) 2019-2024 Dirk Brenken ([email protected])
#
# This is free software, licensed under the GNU General Public License v3.
# disable (s)hellcheck in release
# shellcheck disable=all
# prepare environment
#
export LC_ALL=C
export PATH="/usr/sbin:/usr/bin:/sbin:/bin"
input1="./doh-domains_overall.txt"
input2="input2.txt"
input3="input3.txt"
upstream="8.8.8.8"
check_domains="google.com heise.de openwrt.org"
cache_domains="doh.dns.apple.com doh.dns.apple.com.v.aaplimg.com mask-api.icloud.com mask-h2.icloud.com mask.icloud.com dns.nextdns.io"
dig_tool="$(command -v dig)"
awk_tool="$(command -v awk)"
: >"./${input2}"
: >"./${input3}"
: >"./ipv4.tmp"
: >"./ipv6.tmp"
: >"./ipv4_cache.tmp"
: >"./ipv6_cache.tmp"
: >"./domains.tmp"
: >"./domains_abandoned.tmp"
# sanity pre-checks
#
if [ ! -x "${dig_tool}" ] || [ ! -x "${awk_tool}" ] || [ ! -s "${input1}" ] || [ -z "${upstream}" ]; then
printf "%s\n" "ERR: general pre-check failed"
exit 1
fi
for domain in ${check_domains}; do
out="$("${dig_tool}" "${domain}" A "${domain}" AAAA +noall +answer +time=5 +tries=1 2>/dev/null)"
if [ -z "${out}" ]; then
printf "%s\n" "ERR: domain pre-check failed"
exit 1
else
ips="$(printf "%s" "${out}" | "${awk_tool}" '/^.*[[:space:]]+IN[[:space:]]+A{1,4}[[:space:]]+/{printf "%s ",$NF}')"
if [ -z "${ips}" ]; then
printf "%s\n" "ERR: ip pre-check failed"
exit 1
fi
fi
done
# pre-fill cache domains
#
for domain in ${cache_domains}; do
"${awk_tool}" -v d="${domain}" '$0~d{print $0}' "./doh-ipv4.txt" >>"./ipv4_cache.tmp"
"${awk_tool}" -v d="${domain}" '$0~d{print $0}' "./doh-ipv6.txt" >>"./ipv6_cache.tmp"
done
# domain processing (first run)
#
cnt="0"
doh_start1="$(date "+%s")"
doh_cnt="$("${awk_tool}" 'END{printf "%d",NR}' "./${input1}" 2>/dev/null)"
printf "%s\n" "::: Start DOH-processing, overall domains: ${doh_cnt}"
while IFS= read -r domain; do
(
domain_ok="false"
out="$("${dig_tool}" "${domain}" A "${domain}" AAAA +noall +answer +time=5 +tries=1 2>/dev/null)"
if [ -n "${out}" ]; then
ips="$(printf "%s" "${out}" | "${awk_tool}" '/^.*[[:space:]]+IN[[:space:]]+A{1,4}[[:space:]]+/{printf "%s ",$NF}')"
if [ -n "${ips}" ]; then
for ip in ${ips}; do
if [ "${ip%%.*}" = "127" ] || [ "${ip%%.*}" = "0" ] || [ -z "${ip%%::*}" ]; then
continue
else
if ipcalc-ng -cs "${ip}"; then
domain_ok="true"
if [ "${ip##*:}" = "${ip}" ]; then
printf "%-20s%s\n" "${ip}" "# ${domain}" >>"./ipv4.tmp"
else
printf "%-40s%s\n" "${ip}" "# ${domain}" >>"./ipv6.tmp"
fi
fi
fi
done
else
printf "%s\n" "$domain" >>"./${input2}"
fi
fi
if [ "${domain_ok}" = "false" ]; then
printf "%s\n" "${domain}" >>./domains_abandoned.tmp
else
printf "%s\n" "${domain}" >>./domains.tmp
fi
) &
hold1="$((cnt % 512))"
hold2="$((cnt % 2048))"
[ "${hold1}" = "0" ] && sleep 3
[ "${hold2}" = "0" ] && wait
cnt="$((cnt + 1))"
done <"${input1}"
wait
error_cnt="$("${awk_tool}" 'END{printf "%d",NR}' "./${input2}" 2>/dev/null)"
doh_end="$(date "+%s")"
doh_duration="$(((doh_end - doh_start1) / 60))m $(((doh_end - doh_start1) % 60))s"
printf "%s\n" "::: First run, duration: ${doh_duration}, processed domains: ${cnt}, error domains: ${error_cnt}"
# domain processing (second run)
#
cnt="0"
doh_start2="$(date "+%s")"
while IFS= read -r domain; do
(
domain_ok="false"
out="$("${dig_tool}" "@${upstream}" "${domain}" A "${domain}" AAAA +noall +answer +time=5 +tries=1 2>/dev/null)"
if [ -n "${out}" ]; then
ips="$(printf "%s" "${out}" | "${awk_tool}" '/^.*[[:space:]]+IN[[:space:]]+A{1,4}[[:space:]]+/{printf "%s ",$NF}')"
if [ -n "${ips}" ]; then
for ip in ${ips}; do
if [ "${ip%%.*}" = "0" ] || [ -z "${ip%%::*}" ]; then
continue
else
if ipcalc-ng -cs "${ip}"; then
domain_ok="true"
if [ "${ip##*:}" = "${ip}" ]; then
printf "%-20s%s\n" "${ip}" "# ${domain}" >>"./ipv4.tmp"
else
printf "%-40s%s\n" "${ip}" "# ${domain}" >>"./ipv6.tmp"
fi
fi
fi
done
else
printf "%s\n" "$domain" >>"./${input3}"
fi
fi
if [ "${domain_ok}" = "false" ]; then
printf "%s\n" "${domain}" >>./domains_abandoned.tmp
else
printf "%s\n" "${domain}" >>./domains.tmp
fi
) &
hold1="$((cnt % 512))"
hold2="$((cnt % 2048))"
[ "${hold1}" = "0" ] && sleep 3
[ "${hold2}" = "0" ] && wait
cnt="$((cnt + 1))"
done <"${input2}"
wait
error_cnt="$("${awk_tool}" 'END{printf "%d",NR}' "./${input3}" 2>/dev/null)"
doh_end="$(date "+%s")"
doh_duration="$(((doh_end - doh_start2) / 60))m $(((doh_end - doh_start2) % 60))s"
printf "%s\n" "::: Second run, duration: ${doh_duration}, processed domains: ${cnt}, error domains: ${error_cnt}"
# sanity re-check
#
if [ ! -s "./ipv4.tmp" ] || [ ! -s "./ipv6.tmp" ] || [ ! -s "./domains.tmp" ] || [ ! -f "./domains_abandoned.tmp" ]; then
printf "%s\n" "ERR: general re-check failed"
exit 1
fi
# final sort/merge step
#
sort -b -u -n -t. -k1,1 -k2,2 -k3,3 -k4,4 "./ipv4_cache.tmp" "./ipv4.tmp" >"./doh-ipv4.txt"
sort -b -u -k1,1 "./ipv6_cache.tmp" "./ipv6.tmp" >"./doh-ipv6.txt"
sort -b -u "./domains.tmp" >"./doh-domains.txt"
sort -b -u "./domains_abandoned.tmp" >"./doh-domains_abandoned.txt"
cnt_cache_tmpv4="$("${awk_tool}" 'END{printf "%d",NR}' "./ipv4_cache.tmp" 2>/dev/null)"
cnt_cache_tmpv6="$("${awk_tool}" 'END{printf "%d",NR}' "./ipv6_cache.tmp" 2>/dev/null)"
cnt_tmpv4="$("${awk_tool}" 'END{printf "%d",NR}' "./ipv4.tmp" 2>/dev/null)"
cnt_tmpv6="$("${awk_tool}" 'END{printf "%d",NR}' "./ipv6.tmp" 2>/dev/null)"
cnt_ipv4="$("${awk_tool}" 'END{printf "%d",NR}' "./doh-ipv4.txt" 2>/dev/null)"
cnt_ipv6="$("${awk_tool}" 'END{printf "%d",NR}' "./doh-ipv6.txt" 2>/dev/null)"
doh_end="$(date "+%s")"
doh_duration="$(((doh_end - doh_start1) / 60))m $(((doh_end - doh_start1) % 60))s"
printf "%s\n" "::: Finished DOH-processing, duration: ${doh_duration}, cachev4/cachev6: ${cnt_cache_tmpv4}/${cnt_cache_tmpv6}, all/unique IPv4: ${cnt_tmpv4}/${cnt_ipv4}, all/unique IPv6: ${cnt_tmpv6}/${cnt_ipv6}"