print_config_title 'CHECK DNS CONFIG'

# Test resolver
for name_to_resolv in ${NAMES_TO_RESOLV_AND_PING[@]};
do
	echo -e "Check resolve ${BLUE}${name_to_resolv}${NC}"
	
	# Check if name is resolved
	# We use nslookup because return code can be used in our case
	nslookup ${name_to_resolv} &>/dev/null

	# Return Code
	RC=$?
	
	# Resolving failed
	if [ $RC -ne 0 ]
	then
		RESOLV_FAILED="${RESOLV_FAILED} ${name_to_resolv}"
		echo -e "${RED}Resolve ${name_to_resolv} FAILED : check KO${NC}\n"
	# Resolving succeded
	else
		echo -e "${GREEN}Resolve ${name_to_resolv} SUCCEDED : check OK${NC}\n"
	fi
done

# Check /etc/resolv.conf
for resolver in ${RESOLVERS[@]}
do
	echo -e "Check in /etc/resolv.conf if this name server is present :  ${BLUE}${resolver}${NC}" 

	# Check /etc/resolv.conf
	grep -qi "^nameserver[[:space:]]*${resolver}[[:space:]]*$" /etc/resolv.conf

	# Return Code
        RC=$?

        # Resolver is NOT in the file
        if [ $RC -ne 0 ]
        then
		RESOLVER_NOT_IN_ETC_RESOLVCONF="${RESOLVER_NOT_IN_ETC_RESOLVCONF} ${resolver}"
                echo -e "${RED}${resolver} is NOT in /etc/resolv.conf : check KO${NC}\n"
        # Resolver is in the file
        else
                echo -e "${GREEN}${resolver} is in /etc/resolv.conf : check OK${NC}\n"
        fi
done

# Check if IP recorded in DNS
for ip in ${LOCALES_IP_WITHOUT_LOOPBACK[@]}
do
	echo -e "Check if IP is recorded in DNS : ${BLUE}${ip}${NC}" 

	# Check /etc/resolv.conf
	nslookup ${ip} &>/dev/null

	# Return Code
        RC=$?

        # IP NOT recorded in DNS
        if [ $RC -ne 0 ]
        then
		IP_NOT_RECORDED_IN_DNS="${IP_NOT_RECORDED_IN_DNS} ${ip}"
                echo -e "${RED}${ip} is NOT recorded in DNS : check KO${NC}\n"
        # IP recorded in DNS
        else
                echo -e "${GREEN}${ip} is recorded in DNS : check OK${NC}\n"
        fi
done

# Check if hostname recorded in DNS (A and AAAA records)
echo -e "Check if hostname is recorded in DNS : ${BLUE}A and AAAA records${NC}" 

# Check if record A is set in DNS for hostname
nslookup -querytype=A $(hostname) &>/dev/null

# Return Code
RC=$?

# If no 'A' DNS record for hostname
if [ $RC -ne 0 ]
then
	HOSTNAME_A_RECORD_NOT_IN_DNS=1
	echo -e "${RED}Hostname is NOT recorded in DNS (A record) : check KO${NC}\n"
# If 'A' DNS record for hostname exist
else
	echo -e "${GREEN}Hostname is recorded in DNS (A record) : check OK${NC}\n"
fi

# Check if record AAAA is set in DNS for hostname
nslookup -querytype=AAAA $(hostname) &>/dev/null

# Return Code
RC=$?

# If no 'AAAA' DNS record for hostname
if [ $RC -ne 0 ]
then
	HOSTNAME_AAAA_RECORD_NOT_IN_DNS=1
	echo -e "${RED}Hostname is NOT recorded in DNS (AAAA record) : check KO${NC}\n"
# If 'AAAA' DNS record for hostname exist
else
	echo -e "${GREEN}Hostname is recorded in DNS (AAAA record) : check OK${NC}\n"
fi