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#!/bin/bash
# -----------------------------------------------------------------------------
#
# Copyright (c) 2011 - OpenSLX GmbH
#
# This program is free software distributed under the GPL version 2.
# See http://openslx.org/COPYING
#
# If you have any feedback please consult http://openslx.org/feedback and
# send your suggestions, praise, or complaints to feedback@openslx.org
#
# General information about OpenSLX can be found at http://openslx.org/
# -----------------------------------------------------------------------------
#
# Mini-Linux Toolkit
#
# -----------------------------------------------------------------------------
. /opt/openslx/config
RESOLV_CONF="/etc/resolv.conf"
THISFILE="/run/udhcpc/${interface}.resolv"
echo "$interface [$1] $ip" >> "/tmp/udhcpclog"
rebuild_resolv_conf () {
# Maybe make this smarter some time, if anyone is using client's that are on multiple networks at once etc...
# This is a little braindead but should work most of the time
sort -u /run/udhcpc/*.resolv > "$RESOLV_CONF"
}
escape_search() {
echo "$@" | sed -e 's/[]\/()$*.^|[]/\\&/g'
}
escape_replace() {
echo "$@" | sed -e 's/[\/&]/\\&/g'
}
case "$1" in
bound|renew)
ip addr add "$ip/$(ipcalc -s -p $ip $subnet|sed s/.*=//)" dev "$interface"
if [ -n "$router" ]; then
ip route add default via "$router"
fi
# Update resolver configuration file
CONF=""
if [ -n "$domain" ]; then
printf -v CONF "domain $domain\nsearch $domain\n"
elif [ -n "$SLX_NET_DOMAIN" ]; then
printf -v CONF "domain $SLX_NET_DOMAIN\nsearch $SLX_NET_DOMAIN\n"
fi
for i in $dns; do
echo "$0: Adding DNS $i"
printf -v CONF "${CONF}nameserver $i\n"
done
if [ -x /sbin/resolvconf ] && [ -L /etc/resolv.conf ] && [ -d /etc/resolvconf/update.d ]; then
# Automatic handling :-)
resolvconf --create-runtime-directories
resolvconf --enable-updates
echo -n "$CONF" | resolvconf -a "${interface}.udhcpc"
else
# Manual handling required :-(
mkdir -p "/run/udhcpc"
echo -n "$CONF" | sed 's# 132\.200\.# 132.230.#g' > "$THISFILE" # HACK for Pharmazie-Pool, as DHCP gives wrong DNS information. Remove when DHCP guys fixed it...
rebuild_resolv_conf
fi
# Things that should only happen for the main interface that was used for booting
if [ "$interface" == "br0" ]; then
# Update IP
sed -i "s/^\(SLX_PXE_CLIENT_IP=\).*$/\1'$ip'/" /opt/openslx/config
# Only if network is not ready yet
if [ ! -e "/run/udhcpc/network-ready" ]; then
# Update hostname
dns_host=$(rdns "$ip")
if [ -z "$dns_host" ]; then
# fallback to what the dhcp told us
dns_host="$hostname"
fi
# Avoid empty hostnames
[ -z "$dns_host" ] && dns_host="slx-client"
echo "$dns_host" > "/proc/sys/kernel/hostname"
echo "$dns_host" > "/etc/hostname"
if grep '^SLX_HOSTNAME=' /opt/openslx/config 2>/dev/null; then
sed -i "s/^\(SLX_HOSTNAME=\).*$/\1'$dns_host'/" /opt/openslx/config
else
echo "# Config written by openslx-dhcp-script (1)" >> /opt/openslx/config
echo "SLX_HOSTNAME='$dns_host'" >> /opt/openslx/config
fi
# if domain is given from dhcp, save it to openslx config for later use in VMs
if [ -n "$domain" ]; then
# check if SLX_NET_DOMAIN is in the config at all
if grep '^SLX_NET_DOMAIN=' /opt/openslx/config 2>/dev/null; then
sed -i "s/^\(SLX_NET_DOMAIN=\).*$/\1'$domain'/" /opt/openslx/config
else
# not set, add it
echo "SLX_NET_DOMAIN='$domain'" >> /opt/openslx/config
fi
fi
# Update /etc/issue for proper spacing
/opt/openslx/scripts/openslx-create_issue
fi
fi
# Hostname in /etc/hosts
touch /etc/hosts
if [ -n "$dns_host" ]; then
short="${dns_host%%.*}"
[ "x$short" = "x$dns_host" ] && short=""
sed -i -r "s/\s$(escape_search "$dns_host")(\s|$)/ /g" /etc/hosts
[ -n "$short" ] && sed -i -r "s/\s$(escape_search "$short")(\s|$)/ /g" /etc/hosts
if grep -q -E "^$ip\s" /etc/hosts; then
sed -i "s/^$(escape_search "$ip")\s/$(escape_replace "$ip $dns_host $short ")/g" /etc/hosts
else
echo "$ip $dns_host $short" >> /etc/hosts
fi
fi
if [ -n "$hostname" -a "x$hostname" != "x$dns_host" ]; then
short="${hostname%%.*}"
[ "x$short" = "x$hostname" ] && short=""
sed -i -r "s/\s$(escape_search "$hostname")(\s|$)/ /g" /etc/hosts
[ -n "$short" ] && sed -i -r "s/\s$(escape_search "$short")(\s|$)/ /g" /etc/hosts
if grep -q -E "^$ip\s" /etc/hosts; then
sed -i "s/^$(escape_search "$ip")\s/$(escape_replace "$ip $hostname $short ")/g" /etc/hosts
else
echo "$ip $hostname $short" >> /etc/hosts
fi
fi
sed -i -r '/^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+\s*$/d' /etc/hosts
# We consider the network setup to be complete if an interface is being configured that
# has a default route and some dns servers set.
if [ -n "$router" ] && [ -n "$dns" ] && [ ! -e "/run/udhcpc/network-ready" ]; then
touch "/run/udhcpc/network-ready"
# Write to openslx-config
echo "# Config written by openslx-dhcp-script (2)" >> /opt/openslx/config
echo "SLX_DNS='$dns'" >> /opt/openslx/config
# Mark network target as reached
systemctl start network.target
# Port redirection for printing
iptables -A INPUT -i br0 -p tcp --dport 515 -j DROP
iptables -A INPUT -i br0 -p tcp --dport 5515 -j DROP
iptables -t nat -A PREROUTING -p tcp --dport 515 -j REDIRECT --to-port 5515
fi
;;
deconfig)
if [ $(grep -c "nfs=" /proc/cmdline) == 0 ]; then
echo 1 > "/proc/sys/net/ipv4/conf/$interface/promote_secondaries"
clientip=${ip%%:*}
ip addr del "$clientip/$(ipcalc -s -p $clientip $subnet|sed s/.*=//)" dev "$interface"
else
echo "NFS is active, not removing old ip adress. warning: lease may expire after a while."
fi
if [ -x /sbin/resolvconf ] && [ -L /etc/resolv.conf ] && [ -d /etc/resolvconf/update.d ]; then
# Automatic handling :-)
resolvconf -d "${interface}.udhcpc"
else
# Manual handling required :-(
rm -f "$THISFILE"
rebuild_resolv_conf
fi
;;
leasefail)
echo "$0: Lease failed: $message"
;;
nak)
echo "$0: Received a NAK: $message"
;;
*)
echo "$0: Unknown udhcpc command: $1";
exit 1;
;;
esac
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