#!/bin/bash
#

set -e

# variables
DNSMASQ_DIR="/var/lib/llxcfg-dnsmasq"
HOSTS_DIR="$DNSMASQ_DIR/hosts"
CONF_DIR="$DNSMASQ_DIR/config"
DB_HOSTS="${HOSTS_DIR}/hosts-reg"
DB_HOSTS_UNREG="${HOSTS_DIR}/hosts-unreg"
DB_SRV_ALIAS="$CONF_DIR/cname-server"
DB_HOST_ALIAS="$CONF_DIR/cname-hosts"
DB_EXTRA_NS="$CONF_DIR/extra-ns"
DB_DHCP="$DNSMASQ_DIR/macs/all-hosts"
DNS_CAP_HOSTS="$HOSTS_DIR/cap.hosts"
DNS_CAP_CONF="/etc/dnsmasq.d/cap.conf"

ALL_ALIAS=""

VAR_LIST="SRV_DOMAIN DNS_EXTRA_NS SRV_BITMASK SRV_IP SRV_FQDN CAP_NET_ADDRESS CAP_NET_DOMAIN CAP_NET_CAPNAME"
LLX_GETVAR="/usr/sbin/llxcfg-showvars"

# libreria
LIB_FILE="/usr/share/lliurex/lliurex-srv-common/lliurex-netfuncs.sh"
[ -e "$LIB_FILE" ] || exit 1
. $LIB_FILE

dbgen_hosts_alias(){
   HOST_NUM=1
   HOST_MAX=`get_dhcp_host_max`
   while [ $HOST_NUM -le $HOST_MAX ] ; do
      HOST_ALIAS="$(get_dhcp_host_alias $HOST_NUM)"
      if [ "$HOST_ALIAS" ] ; then
         HOST_NAME="`get_dhcp_host_name ${HOST_NUM}`"
         HOST_IP="$(get_dhcp_host_address {HOST_NUM})"
         for alias in ${HOST_ALIAS}; do
            if ! echo " $HOST_NAME $ALL_ALIAS " |grep -q " $alias " ; then
               echo "cname=${alias},$HOST_NAME"
               ALL_ALIAS="$ALL_ALIAS $alias"
            fi
         done
      fi
      HOST_NUM=$((${HOST_NUM}+1))
   done
}

get_extra_ns(){
   [ "$DNS_EXTRA_NS" ] || return 0
   echo "$DNS_EXTRA_NS" |tr " " "\n" |sed -e "/^$/d;s%^%server=%"
}

gen_cap_hosts(){
	n=1
	while [ $n -le 254 ] ; do
		echo -e "${CAP_NET_ADDRESS%.*}.$n\tnode-$n.$CAP_NET_CAPNAME.$CAP_NET_DOMAIN"
		n=$(($n + 1))
	done
	return 0
}

########
# main #
########

# lee DNS_DOMAIN y DNS_EXTERNAL_NS y VHOST_NAMES
[ -x ${LLX_GETVAR} ] && eval `${LLX_GETVAR} ${VAR_LIST}`
SRV_ALIASES="$(get_dhcp_host_alias 0)"
ALL_ALIAS="$SRV_ALIASES"

# generate upstream server list
get_extra_ns |skel-install "$DB_EXTRA_NS"

# generate server-alias db (cname-server)
echo "$SRV_ALIASES" |tr " " "\n"  |sed "/^[[:blank:]]*$/d;s%$%.$SRV_DOMAIN%;/^$SRV_FQDN$/d;s%^%cname=%;s%$%,$SRV_FQDN%" |skel-install "${DB_SRV_ALIAS}"

# generate hosts aliases db (cname-hosts)

get_dhcp_dnsmasq_alias_list |skel-install "$DB_HOST_ALIAS"

#generate hosts db

get_dhcp_dnsmasq_list |skel-install "$DB_HOSTS"


#generate unreg hosts db
get_noreg_dnsmasq_list |skel-install "$DB_HOSTS_UNREG"

#generate dhcp
if [ ! -e "$DB_DHCP" ]; then
	get_dhcp_dnsmasq_mac_list |skel-install "$DB_DHCP"
fi

# generate cap domain info

[ "$CAP_NET_ADDRESS" ] || exit 0
[ "$CAP_NET_DOMAIN" ] || exit 0
[ "$CAP_NET_CAPNAME" ] || exit 0

{ echo "domain=$CAP_NET_CAPNAME.$CAP_NET_DOMAIN,${CAP_NET_ADDRESS%.*}.1,${CAP_NET_ADDRESS%.*}.254" ; echo "local=/$CAP_NET_CAPNAME.$CAP_NET_DOMAIN/" ; } |skel-install "$DNS_CAP_CONF"
gen_cap_hosts |skel-install "$DNS_CAP_HOSTS" 


exit 0