dyn_ip

#!/bin/bash
#
# Sends DNS-SD updates for domain browsing setup
#------------------------------------------------------------------------------


# load helpful functions
for i in functions/*.sh
do
        . ${i}
        [[ -n ${DEBUG_SET_VARS} ]] && echo "Sourced ${PWD}/$i ..."
done

set_vars $*

#------------------------------------------------------------------------------

# define default update add
NSUPDATE_ACTION=${NSUPDATE_ACTION:-"add"}
NSUPDATE_TTL="60"

NSUPDATE_AUTH_SIG0_KEY_FQDN=${NSUPDATE_AUTH_SIG0_KEY_FQDN:-${NEW_FQDN}}
[[ -n ${DEBUG} ]] && echo "DEBUG: NSUPDATE_AUTH_SIG0_KEY_FQDN='${NSUPDATE_AUTH_SIG0_KEY_FQDN}'"

# split NEW_FQDN into DNS ZONE & SUBLABEL
ZONE=$(get_soa "${NEW_FQDN}")
[[ ! -n ${ZONE} ]] && echo "Could not find SOA in FQDN '${NEW_FQDN}'" && exit 1
NEW_SUBZONE=${NEW_FQDN%*${ZONE}}
[[ -n ${NEW_SUBZONE} ]] && NEW_SUBZONE=${NEW_SUBZONE::-1} # if not null, remove trailing dot

# recursively search keystore for most particular subdomain keypair under ZONE
subdomain="${NSUPDATE_AUTH_SIG0_KEY_FQDN:-NEW_FQDN}"
while [[ ! -n "${NSUPDATE_AUTH_SIG0_KEYID}" ]] && [[ "${subdomain}" == *"${ZONE}" ]]
do
	# [[ -n ${DEBUG} ]] && echo "DEBUG: get_sig0_keyid NSUPDATE_AUTH_SIG0_KEYID '${subdomain}' '${NSUPDATE_SIG0_KEYPATH}'"
	get_sig0_keyid NSUPDATE_AUTH_SIG0_KEYID "${subdomain}" "${NSUPDATE_SIG0_KEYPATH}"
	[[ ! -n "${NSUPDATE_AUTH_SIG0_KEYID}" ]] && subdomain="${subdomain#*.}"
done

# loop over command line parameter (post getops()) for IPv[4,6] assignments
for ip in ${CMDLINE_EXTRA_PARAMS}; do
        if validateIPv4 "${ip}";then
		NSUPDATE_RRTYPE="A"
		# [[ -n ${DEBUG} ]] && echo "$ip is parsed as an IPv4 Address. Set A Record"
		NSUPDATE_ITEM_RR="${NSUPDATE_ITEM_RR}update ${NSUPDATE_ACTION} ${NEW_FQDN} ${NSUPDATE_TTL} ${NSUPDATE_RRTYPE} ${ip}\n"
	else
                validateIPv6 "${ip}"
                isIPv6="$?"
                if [[ $isIPv6 -eq 0 ]];then
			NSUPDATE_RRTYPE="AAAA"
			# [[ -n ${DEBUG} ]] && echo "$ip is parsed as an IPv6 Address. Set ${NSUPDATE_RRTYPE} Record"
			NSUPDATE_ITEM_RR="${NSUPDATE_ITEM_RR}update ${NSUPDATE_ACTION} ${NEW_FQDN} ${NSUPDATE_TTL} ${NSUPDATE_RRTYPE} ${ip}\n"
                else
                        echo "Warning: Skipping Invalid IP Address ($ip)"
                fi
        fi
done

# form nsupdate RR update statements
case ${NSUPDATE_ACTION} in
	add)
		# NSUPDATE_PRECONDITION_SET="nxrrset"
		# NSUPDATE_PRECONDITION="prereq ${NSUPDATE_PRECONDITION_SET} ${word}._dns-sd._udp.${DNSSD_DOMAIN}. IN PTR"
		# NSUPDATE_ITEM_RR="update ${NSUPDATE_ACTION} ${word}._dns-sd._udp.${DNSSD_DOMAIN} ${NSUPDATE_TTL} PTR ${DNSSD_DOMAIN}."
		send_nsupdate "${NEW_FQDN}" "$(echo ${NSUPDATE_PRECONDITION};echo -e ${NSUPDATE_ITEM_RR})" "${subdomain}"
		;;
	delete)
		# NSUPDATE_PRECONDITION_SET="yxrrset"
		# NSUPDATE_PRECONDITION="prereq ${NSUPDATE_PRECONDITION_SET} ${word}._dns-sd._udp.${DNSSD_DOMAIN}. IN PTR"
		# NSUPDATE_ITEM_RR="update ${NSUPDATE_ACTION} ${word}._dns-sd._udp.${DNSSD_DOMAIN} ${NSUPDATE_TTL} PTR ${DNSSD_DOMAIN}."
		send_nsupdate "${NEW_FQDN}" "$(echo ${NSUPDATE_PRECONDITION};echo -e ${NSUPDATE_ITEM_RR})" "${subdomain}"
		;;
	*)
		# NSUPDATE_ACTION should default to "add" - should never get here
		echo "Error: NSUPDATE_ACTION is set to '${NSUPDATE_ACTION}', but must be set to 'add' or 'delete'."
		exit 1
		;;
esac


DIG_QUERY_PARAM="@${ZONE_SOA_MASTER} +noall +answer +dnssec"
echo "$( dig ${DIG_QUERY_PARAM} ${NEW_FQDN} A )"
echo "$( dig ${DIG_QUERY_PARAM} ${NEW_FQDN} AAAA )"