#!/bin/bash
set -e -u -x

DN1 () { sed -ne 's/^DN: //p;T;q';}
MAC () { od -A n -N 6 -t x1 /dev/urandom|tr ' ' :|tail -c +2;}
NET=192.0.2
IP () { echo "$NET.$((2 + RANDOM % 253))";}

fqhn="$(hostname -f)"

test="test$RANDOM"
udm container/cn create --set name="$test"
base="cn=$test,$(ucr get ldap/base)"
trap "udm container/cn remove --dn '$base'" EXIT
trap 'rv=$?;set +e +u +x;univention-ldapsearch -LLLo ldif-wrap=no -b "$base"|grep -v -e "^objectClass:" -e "^univentionObjectType:";tty&&read DUMMY||:;exit $rv' ERR

udm dhcp/service create --position "$base" --set service="dhcp"
dhcp="cn=dhcp,$base"

udm dns/forward_zone create --position "$base" --set zone="dns" --set nameserver="$fqhn."
fwd="zoneName=dns,$base"

udm dns/reverse_zone create --position "$base" --set subnet="$NET" --set nameserver="$fqhn."
rev="zoneName=$(echo "$NET" | tr . '\n' | tac | tr '\n' .)in-addr.arpa,$base"

udm networks/network create --position "$base" --set name="net" --set network="$NET.0" --set netmask=24 --set dhcpEntryZone="$dhcp" --set ipRange="$NET.2 $NET.253" --set dnsEntryZoneForward="$fwd" --set dnsEntryZoneReverse="$rev"
net="cn=net,$base"


echo "Let Network chose the IP"
mac="$(MAC)" host="l$RANDOM"
udm computers/linux create --position "$base" --set name="$host" --set mac="$mac" --set network="$net"
udm dhcp/host list --superordinate "$dhcp" --filter host="$host" | grep -F "fixedaddress: $NET."
udm dns/host_record list --superordinate "$fwd" --filter name="$host" | grep -F "a: $NET."
udm dns/ptr_record list --superordinate "$rev" --filter ptr_record="$host.dns." | grep -F "ip: $NET."

echo "Give explicit IP, but DHCP from Network"
ip="$(IP)" mac="$(MAC)" host="l$RANDOM"
udm computers/linux create --position "$base" --set name="$host" --set mac="$mac" --set ip="$ip" --set network="$net"
udm dhcp/host list --superordinate "$dhcp" --filter host="$host" | grep -F "fixedaddress: $ip"
udm dns/host_record list --superordinate "$fwd" --filter name="$host" | grep -F "a: $ip"
udm dns/ptr_record list --superordinate "$rev" --filter relativeDomainName="${ip#$NET.}" | grep -F "ptr_record: $host."

echo "Manual DHCP with dynamic IP from known-hosts-pool"
mac="$(MAC)" host="l$RANDOM"
udm computers/linux create --position "$base" --set name="$host" --set mac="$mac" --set dhcpEntryZone="$dhcp $mac"
udm dhcp/host list --superordinate "$dhcp" --filter host="$host" | grep -F "fixedaddress: None"

echo "Manual DHCP with fixed IP"
ip="$(IP)" mac="$(MAC)" host="l$RANDOM"
udm computers/linux create --position "$base" --set name="$host" --set mac="$mac" --set ip="$ip" --set dhcpEntryZone="$dhcp $ip $mac"
udm dhcp/host list --superordinate "$dhcp" --filter host="$host" | grep -F "fixedaddress: $ip"