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Tweak/gravity dns (#5752)

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yubiuser 2024-09-04 21:45:32 +02:00 committed by GitHub
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1 changed files with 9 additions and 36 deletions
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45
gravity.sh
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@ -298,49 +298,22 @@ gravity_CheckDNSResolutionAvailable() {
# Determine if $lookupDomain is resolvable
if timeout 4 getent hosts "${lookupDomain}" &>/dev/null; then
# Print confirmation of resolvability if it had previously failed
if [[ -n "${secs:-}" ]]; then
echo -e "${OVER} ${TICK} DNS resolution is now available\\n"
fi
echo -e "${OVER} ${TICK} DNS resolution is available\\n"
return 0
elif [[ -n "${secs:-}" ]]; then
echo -e "${OVER} ${CROSS} DNS resolution is not available"
exit 1
fi
# If the /etc/resolv.conf contains resolvers other than 127.0.0.1 then the local dnsmasq will not be queried and pi.hole is NXDOMAIN.
# This means that even though name resolution is working, the getent hosts check fails and the holddown timer keeps ticking and eventually fails
# So we check the output of the last command and if it failed, attempt to use dig +short as a fallback
if timeout 4 dig +short "${lookupDomain}" &>/dev/null; then
if [[ -n "${secs:-}" ]]; then
echo -e "${OVER} ${TICK} DNS resolution is now available\\n"
fi
return 0
elif [[ -n "${secs:-}" ]]; then
echo -e "${OVER} ${CROSS} DNS resolution is not available"
exit 1
fi
# Determine error output message
if pgrep pihole-FTL &>/dev/null; then
echo -e " ${CROSS} DNS resolution is currently unavailable"
else
echo -e " ${CROSS} DNS service is not running"
"${PIHOLE_COMMAND}" restartdns
echo -e " ${CROSS} DNS resolution is currently unavailable"
fi
# Ensure DNS server is given time to be resolvable
secs="120"
echo -ne " ${INFO} Time until retry: ${secs}"
until timeout 1 getent hosts "${lookupDomain}" &>/dev/null; do
[[ "${secs:-}" -eq 0 ]] && break
echo -ne "${OVER} ${INFO} Time until retry: ${secs}"
: $((secs--))
echo -e " ${INFO} Waiting until DNS resolution is available..."
until getent hosts github.com &> /dev/null; do
# Append one dot for each second waiting
str="${str}."
echo -ne " ${OVER} ${INFO} ${str}"
sleep 1
done
# Try again
gravity_CheckDNSResolutionAvailable
# If we reach this point, DNS resolution is available
echo -e "${OVER} ${TICK} DNS resolution is available"
}
# Retrieve blocklist URLs and parse domains from adlist.list