gentoo-overlay/net-dns/djbdns/files/djbdns-setup-r17

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#!/bin/bash
#
# djbdns-setup
#
# Copyright (C) 2004-2006 Kalin KOZHUHAROV <kalin@thinrope.net>
# The latest version of this script can be accessed at:
# rsync://rsync.tar.bz/gentoo-portage-pkalin/net-dns/djbdns/files/djbdns-setup
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# http://www.gnu.org/copyleft/gpl.html
#
# {{{ Rip off the ewarn code from /sbin/functions.sh
WARN=$'\e[33;01m'
NORMAL=$'\e[0m'
ewarn() {
echo -e " ${WARN}*${NORMAL} $*"
return 0
}
# }}}
# {{{ global vars
S_SEPARATOR="--------------------------------------------------------------------------------"
D_SEPARATOR="================================================================================"
REQ_GROUP="nofiles"
REQ_USERS="tinydns dnscache dnslog"
IPs[0]=""
IPs[1]=""
IPs[2]=""
dnscache=0
tinydns=1
axfrdns=2
# global vars }}}
# {{{ functions
check_group_users()
{
echo ": Checking for required group (${REQ_GROUP}) :"
grep ${REQ_GROUP} /etc/group &> /dev/null
if [ $? -ne 0 ]
then
ebegin "Adding group ${REQ_GROUP}"
/usr/sbin/groupadd ${REQ_GROUP} &>/dev/null && eend 0 || eend 1
fi
echo ": Checking for required users (${REQ_USERS}) :"
for user in ${REQ_USERS};
do
grep ${user} /etc/passwd &> /dev/null
if [ $? -ne 0 ]
then
ebegin "Adding user ${user}"
/usr/sbin/useradd -d /dev/null -s /bin/false -g ${REQ_GROUP} ${user} &>/dev/null && eend 0 || eend 1
fi
done
return 0
}
start_services()
{
local services="$1"
echo "${SEPARATOR}"
echo ": Start services :"
echo
echo " Your services (${services// /, }) are ready for startup!"
echo
ewarn " The following requires daemontools to be running!"
local answer=""
read -p " Would you like ${services// /, } to be started and supervised by daemontools now? [Y|n]> " answer
if [ "${answer}" == "Y" ] || [ "${answer}" == "" ]
then
ebegin "Checking if daemontools are running"
ps -A |grep svscanboot &>/dev/null && eend 0 || eend 1
ebegin "Linking services in /service"
# Don't make symbolic links to / !
# use ../ instead as it gives trouble in chrooted environments
local fixedroot_path=`echo ${mypath} | sed -e 's#^/#../#'`
for service in ${services};
do
for ip in ${IPs[${service}]};
do
ln -sf ${fixedroot_path}/${service}/${ip} /service/${service}_${ip}
done
done
eend 0
echo
ls -l --color=auto /service/
echo
ebegin "Waiting 5 seconds for services to start"
sleep 5 && eend 0
echo "${SEPARATOR}"
echo ": Check services status :"
echo
for service in ${services};
do
for ip in ${IPs[${service}]};
do
svstat /service/${service}_${ip} /service/${service}_${ip}/log
done
done
fi
return 0
}
tinydns_setup()
{
return 0
}
axfrdns_setup()
{
echo "${S_SEPARATOR}"
echo ": Grant access to axfrdns :"
echo
TCPRULES_DIR="${mypath}/axfrdns/${myip}/control"
echo " axfrdns is accessed by your secondary servers and when response cannot fit UDP packet"
echo " You have to specify which IP addresses are allowed to access it"
echo " in ${TCPRULES_DIR}/tcp.axfrdns"
echo
echo " Example:"
echo " 1.2.3.4 would allow the host 1.2.3.4"
echo " 1.2.3. would allow ALL hosts 1.2.3.x (like 1.2.3.4, 1.2.3.100, etc.)"
ewarn "Do NOT forget the trailing dot!"
echo
echo " Press Enter if you do not want to allow any access now."
echo
sed -i -e "s#-x tcp.cdb#-x control/tcp.axfrdns.cdb#g" ${mypath}/axfrdns/${myip}/run
if [ -e ${TCPRULES_DIR}/tcp.axfrdns ]
then
ewarn "${TCPRULES_DIR}/tcp.axfrdns exists."
read -p " Do you want it cleared? [y|N]: " answer
if [ "${answer}" == "y" ]
then
echo '# sample line: 1.2.3.4:allow,AXFR="heaven.af.mil/3.2.1.in-addr.arpa"' > ${TCPRULES_DIR}/tcp.axfrdns
fi
fi
read -p " IP to allow (press Enter to end)> " ipallow
while [ "$ipallow" != "" ]
do
echo "${ipallow}:allow" >> ${TCPRULES_DIR}/tcp.axfrdns
read -p " IP to allow (press Enter to end)> " ipallow
done
echo ":deny" >> ${TCPRULES_DIR}/tcp.axfrdns
echo " Here are the tcprules created so far:"
echo
cat ${TCPRULES_DIR}/tcp.axfrdns
echo
local answer=""
read -p " Would you like ${TCPRULES_DIR}/tcp.axfrdns.cdb updated? [Y|n]: " answer
if [ "${answer}" == "Y" ] || [ "${answer}" == "" ]
then
ebegin "Updating ${TCPRULES_DIR}/tcp.axfrdns.cdb"
bash -c "cd ${TCPRULES_DIR} && make" && eend 0 || eend 1
fi
return 0
}
dnscache_setup()
{
echo ": Configure forwarding :"
echo
echo " dnscache can be configured to forward queries to another"
echo " DNS cache (such as the one your ISP provides) rather than"
echo " performing the lookups itself."
echo
echo " To enable this forwarding-only mode (usually a good idea),"
echo " provide the IPs of the caches to forward to."
echo " To have dnscache perform the lookups itself, just press Enter."
echo
read -p " forward-to IP> " myforward
echo
if [ "$myforward" != "" ]
then
echo $myforward > ${mypath}/dnscache/${myip}/root/servers/\@
echo -n "1" > ${mypath}/dnscache/${myip}/env/FORWARDONLY
read -p " forward-to IP (press Enter to end)> " myforward
while [ "$myforward" != "" ]
do
echo $myforward >> ${mypath}/dnscache/${myip}/root/servers/\@
read -p " forward-to IP (press Enter to end)> " myforward
done
echo
echo " Currently all queries will be forwarded to:"
echo
cat ${mypath}/dnscache/${myip}/root/servers/\@
echo
fi
echo "${SEPARATOR}"
echo ": Configuring clients :"
echo
echo " By default dnscache allows only localhost (127.0.0.1) to"
echo " access it. You have to specify the IP addresses of the"
echo " clients that shall be allowed to use it."
echo
echo " Example:"
echo " 1.2.3.4 would allow only one host: 1.2.3.4"
echo " 1.2.3 would allow all hosts 1.2.3.0/24 (e.g. 1.2.3.4, 1.2.3.100, etc.)"
echo
echo " Press Enter if you do NOT want to allow external clients!"
echo
read -p " Allowed IP> " myclientip
while [ "$myclientip" != "" ]
do
touch ${mypath}/dnscache/${myip}/root/ip/${myclientip}
read -p " Allowed IP (press Enter to end)> " myclientip
done
echo
echo " All queries from the hosts below will be answered:"
echo
ls -1 ${mypath}/dnscache/${myip}/root/ip
echo
#TODO
#configure cachsize - $mypath/env/CACHESIZE
#TODO
#configure datalimit - $mypath/env/DATALIMIT
return 0
}
common_setup()
{
local service_human="$1"
local service_machine="$2"
local services="$3"
echo ": ${service_human} setup :"
echo
for service in ${services};
do
if [ ! -e ${mypath}/${service} ]
then
ebegin "Creating ${mypath}/${service}"
mkdir -p $mypath/${service} && eend 0 || eend 1
fi
done
echo "${SEPARATOR}"
echo ": IP address to bind to :"
echo
echo " Specify an address to which the ${service_human} should bind."
echo " Currently accessible IPs:"
local addrs=`ifconfig -a | grep "inet addr" | cut -f2 -d":" | cut -f1 -d" "`
echo " "$addrs
echo
while [ "${myip}" == "" ]
do
read -p " IP to bind to> " myip
done
echo
for service in ${services};
do
IPs[${service}]="${IPs[${service}]} ${myip}"
done
local dnscache_INSTALL="/usr/bin/dnscache-conf dnscache dnslog ${mypath}/dnscache/${myip} $myip"
local tinydns_INSTALL="/usr/bin/tinydns-conf tinydns dnslog ${mypath}/tinydns/${myip} $myip"
local axfrdns_INSTALL="\
/usr/bin/axfrdns-conf tinydns dnslog ${mypath}/axfrdns/${myip} ${mypath}/tinydns/${myip} $myip &&\
mkdir -p ${mypath}/axfrdns/${myip}/control &&\
echo -e \"tcp.axfrdns.cdb:\ttcp.axfrdns\n\ttcprules tcp.axfrdns.cdb .tcp.axfrdns.cdb.tmp < tcp.axfrdns\" > ${mypath}/axfrdns/${myip}/control/Makefile &&\
rm -f ${mypath}/axfrdns/${myip}/tcp ${mypath}/axfrdns/${myip}/Makefile"
for service in ${services};
do
if [ ! -e ${mypath}/${service}/${myip} ]
then
ebegin "Setting up ${service} in ${mypath}/${service}/${myip}"
eval command=\$${service}_INSTALL
/bin/bash -c "${command}" && eend 0 || eend 1
else
ewarn "${service} directory ${mypath}/${service}/${myip} exists, nothing done."
fi
done
}
# functions }}}
# {{{ main script
if [ `id -u` -ne 0 ]
then
ewarn "You must be root to run this script, sorry."
exit 1
else
echo "${D_SEPARATOR}"
echo ": DJB DNS setup :"
echo
echo " This script will help you setup the following:"
echo
echo " DNS server(s): to publish addresses of Internet hosts"
echo
echo " DNS cache(s) : to find addresses of Internet hosts"
echo
echo " For further information see:"
echo " http://cr.yp.to/djbdns/blurb/overview.html"
echo
ewarn "If you have already setup your services,"
ewarn "either exit now, or setup in different directories."
echo
answer=""
read -p " Would you like to continue with setup? [Y|n]> " answer
if [ "${answer}" == "n" ] || [ "${answer}" == "N" ]
then
ewarn "Aborting setup"
exit 1
fi
echo "${D_SEPARATOR}"
echo ": Choose install location :"
echo
default_path="/var"
echo " The default (${default_path}) will install them"
echo " in ${default_path}/\${service}/\${IP_ADDRESS}"
echo
echo " For example:"
echo " /var/tinydns /1.2.3.4"
echo " /192.168.33.1"
echo " /axfrdns /1.2.3.4"
echo " /192.168.33.1"
echo " /dnscache/127.0.0.1"
echo
ewarn "Do NOT enter trailing slash"
echo " Where do you want services installed?"
read -p "[${default_path}] > " mypath
echo
if [ "${mypath}" == "" ]
then
mypath=${default_path}
fi
echo "${D_SEPARATOR}"
check_group_users
answer=""
another=""
until [ "$answer" == "n" ]
do
echo "${D_SEPARATOR}"
answer=""
read -p " Would you like to setup ${another}dnscache? [Y|n]> " answer
if [ "${answer}" == "Y" ] || [ "${answer}" == "" ]
then
myip=""
echo "${S_SEPARATOR}"
common_setup "DNS cache" "dnscache" "dnscache"
if [ $? == 0 ]
then
dnscache_setup
else
ewarn "Skipping dnscache specific setup."
fi
fi
another="another "
done
answer=""
another=""
until [ "$answer" == "n" ]
do
echo "${D_SEPARATOR}"
answer=""
read -p " Would you like to setup ${another}DNS server? [Y|n]> " answer
if [ "${answer}" == "Y" ] || [ "${answer}" == "" ]
then
myip=""
echo "${S_SEPARATOR}"
common_setup "DNS server" "{tinydns,afxrdns}" "tinydns axfrdns"
if [ $? == 0 ]
then
tinydns_setup
axfrdns_setup
else
ewarn "Skipping tinydns and axfrdns specific setup."
fi
fi
another="another "
done
echo "${D_SEPARATOR}"
start_services "tinydns axfrdns dnscache"
echo "${D_SEPARATOR}"
fi
# main script }}}
# vim: set ts=4 fenc=utf-8 foldmethod=marker: