blob: 55a04587a05c8092cdce375f1334be67b0cb66c9 (
plain) (
tree)
|
|
#!/bin/bash
# Needs bash for printf -v VARNAME
# -----------------------------------------------------------------------------
#
# Copyright (c) 2011..2018 bwLehrpool-Projektteam
#
# This program/file is free software distributed under the GPL version 2.
# See https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html
#
# If you have any feedback please consult https://bwlehrpool.de and
# send your feedback to bwlehrpool@hs-offenburg.de.
#
# General information about bwLehrpool can be found at https://bwlehrpool.de
#
# -----------------------------------------------------------------------------
#
# Mini-Linux Toolkit
#
# -----------------------------------------------------------------------------
. /opt/openslx/config
primary="br0"
[ -n "$SLX_BRIDGE" ] && primary="$SLX_BRIDGE"
RESOLV_CONF="/opt/openslx/resolv.conf"
THIS_RESOLV="/run/network/${interface}.resolv"
rebuild_resolv_conf () {
# Don't do anything if the active resolv.conf is not ours
# Also this will not run resolvconf update.d... No idea if we should still do so...
[ -L "/etc/resolv.conf" ] || return 0
[ "x$(readlink "/etc/resolv.conf")" == "x${RESOLV_CONF}" ] || return 0
# Maybe make this smarter some time, if anyone is using clients that are on multiple networks at once etc...
# This is a little braindead but should work most of the time
sort -u /run/network/*.resolv > "$RESOLV_CONF" 2> /dev/null
# add support for resolv.conf update scripts // see man(8) resolvconf
for s in /etc/resolvconf/update.d/*.sh; do
[ -f "$s" ] && [ -x "$s" ] && "$s"
done
}
escape_search() {
echo "$@" | sed -e 's/[]\/()$*.^|[]/\\&/g'
}
escape_replace() {
echo "$@" | sed -e 's/[\/&]/\\&/g'
}
check_env() {
if [ -z "$ip" ] || [ -z "$subnet" ] || [ -z "$interface" ]; then
echo "$1 event with missing data" >&2
echo "ip = '$ip'" >&2
echo "subnet = '$subnet'" >&2
echo "interface = '$interface'" >&2
exit 1
fi
}
if [ ! -d /run ]; then
echo -n "Waiting for /run." >&2
while [ ! -d /run ]; do
echo -n "." >&2
usleep 500000
done
echo "" >&2
fi
case "$1" in
bound|renew)
check_env "$1"
mkdir -p "/run/dhcpc"
# Set address on interface
ip addr add "$ip/$(ipcalc -s -p "$ip" "$subnet" | sed s/.*=//)" dev "$interface"
# Set default route, if given
if [ -n "$router" ]; then
ip route add default via "$router"
fi
# get domain, hostname and thus fqdn from DNS
dns_fqdn=$(/opt/openslx/bin/busybox timeout -t 3 rdns "$ip")
dns_short="${dns_fqdn%%.*}"
# check if it is fqdn
if [ "$dns_fqdn" == "$dns_short" ]; then
unset dns_fqdn dns_short
fi
# Update resolver configuration file
conf_file="$(mktemp)"
# Own domain suffix
if [ -n "$domain" ]; then
:
elif [ -n "$dns_fqdn" ]; then
domain="${dns_fqdn#*.}"
elif [ -n "$SLX_NET_DOMAIN" ]; then
domain="$SLX_NET_DOMAIN"
fi
if [ -n "$domain" ]; then
echo "domain ${domain%% *}" >> "${conf_file}"
fi
# Add domain to list of search domains if not in there yet
if [ -n "$domain" ] && [ -n "$search" ]; then
FOUND=no
for sd in $search; do
[ "x$sd" = "x$domain" ] && FOUND=yes
done
[ "$FOUND" = "no" ] && search="$domain $search"
elif [ -n "$domain" ]; then
search="$domain"
fi
# Search domains
if [ -n "$search" ]; then
echo "search $search" >> "${conf_file}"
elif [ -n "$SLX_NET_SEARCH" ]; then
echo "search $SLX_NET_SEARCH" >> "${conf_file}"
elif [ -n "$SLX_NET_DOMAIN" ]; then
echo "search $SLX_NET_DOMAIN" >> "${conf_file}"
fi
for i in $dns; do
echo "$0: Adding DNS $i"
echo "nameserver $i" >> "${conf_file}"
done
if [ -x "/sbin/resolvconf" ] && [ -L "/etc/resolv.conf" ] && [ -d "/etc/resolvconf/update.d" ]; then
# Automatic handling :-)
resolvconf --create-runtime-directories
resolvconf --enable-updates
< "$conf_file" resolvconf -a "${interface}.udhcpc"
rm -- "$conf_file"
else
# Manual handling required :-(
mv -f "$conf_file" "$THIS_RESOLV"
rebuild_resolv_conf
fi
# Things that should only happen for the main interface that was used for booting
if [ "$interface" = "$primary" ]; then
# Update IP
sed -i "s/^\(SLX_PXE_CLIENT_IP=\).*$/\1'$ip'/" /opt/openslx/config
# Write DOMAIN and SEARCH to /opt/openslx/config if empty
if [ -z "$SLX_NET_DOMAIN" ] && [ -n "$domain" ]; then
sed -i "/^SLX_NET_DOMAIN=/d" /opt/openslx/config
echo "SLX_NET_DOMAIN='$domain'" >> /opt/openslx/config
fi
if [ -z "$SLX_NET_SEARCH" ] && [ -n "$search" ]; then
sed -i "/^SLX_NET_SEARCH=/d" /opt/openslx/config
echo "SLX_NET_SEARCH='$search'" >> /opt/openslx/config
fi
# Same for WINS servers
if [ -z "$SLX_NET_WINS" ] && [ -n "$wins" ]; then
sed -i "/^SLX_NET_WINS=/d" /opt/openslx/config
echo "SLX_NET_WINS='$wins'" >> /opt/openslx/config
fi
# Only if network is not ready yet
if [ ! -e "/run/network/network-ready" ]; then
# Update hostname
if [ -z "$dns_fqdn" ] && [ -n "$domain" ] && [ -n "$hostname" ]; then
# fallback to what the dhcp told us
dns_fqdn="${hostname}.${domain}"
fi
if [ -z "$dns_fqdn" ]; then
# only if there is no /etc/hostname, we fall back (far back, that is)
[ ! -s "/etc/hostname" ] && dns_fqdn="slx-client"
fi
# finally, if dns_fqdn was set to anything, apply it
if [ -n "$dns_fqdn" ]; then
dns_short="${dns_fqdn%%.*}"
echo "$dns_short" > "/proc/sys/kernel/hostname"
echo "$dns_short" > "/etc/hostname"
if grep '^SLX_HOSTNAME=' /opt/openslx/config 2>/dev/null; then
sed -i "s/^\(SLX_HOSTNAME=\).*$/\1'$dns_short'/" /opt/openslx/config
else
echo "# Config written by openslx-dhcp-script (1)" >> /opt/openslx/config
echo "SLX_HOSTNAME='$dns_short'" >> /opt/openslx/config
fi
fi
# Update /etc/issue for proper spacing
/opt/openslx/scripts/openslx-create_issue
touch "/run/network/network-ready"
# Mark network target as reached
systemctl start network.target &
fi # end "network not ready yet"
# Remove any stray addresses; we expect the primary interface to only have one
# address supplied via DHCP. We do this after adding the new one, obviously.
rem_list=$( ip -o addr show "$interface" | awk '{ for (i=1;i<NF;++i) if ($i == "inet") print $(i+1) }' | grep -v "^${ip}/" )
if [ -n "$rem_list" ]; then
echo "PRIMARY: Removing $rem_list since we just got assigned $ip"
echo 1 > "/proc/sys/net/ipv4/conf/$interface/promote_secondaries"
for addr in $rem_list; do
ip addr del "$addr" dev "$interface"
sed -i "/^$(escape_search "${addr%/*}")(\s|$)/d" /etc/hosts
done
fi
fi # end "primary only"
# Hostname in /etc/hosts
touch "/etc/hosts"
hostlist=""
[ -n "$dns_fqdn" ] && hostlist="$dns_fqdn"
[ -n "$hostname" ] && [ -n "$domain" ] && [ "x${hostname}.${domain}" != "x$dns_fqdn" ] && hostlist="$hostlist ${hostname}.${domain}"
if [ -n "$hostlist" ]; then
for host in $hostlist; do
host_short="${host%%.*}"
[ "x$host_short" = "x$host" ] && host_short=""
sed -i -r "s/\s$(escape_search "$host")(\s|$)/ /g" /etc/hosts
[ -n "$host_short" ] && sed -i -r "s/\s$(escape_search "$host_short")(\s|$)/ /g" /etc/hosts
if grep -q -E "^$ip\s" /etc/hosts; then
sed -i "s/^$(escape_search "$ip")\s.*/$(escape_replace "$ip $host $host_short")/g" /etc/hosts
else
echo "$ip $host $host_short" >> /etc/hosts
fi
done
fi
# Get rid of orphaned lines in /etc/hosts
sed -i -r '/^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+\s*$/d' /etc/hosts
# "dns ready" target
if [ -n "$dns" ] && [ ! -e "/run/network/dns-ready" ]; then
touch "/run/network/dns-ready"
# Write to openslx-config
echo "# Config written by openslx-dhcp-script (2)" >> /opt/openslx/config
echo "SLX_DNS='$dns'" >> /opt/openslx/config
systemctl start network-dns.target &
fi
# "default route exists" target
if [ -n "$router" ] && [ ! -e "/run/network/gateway-ready" ]; then
touch "/run/network/gateway-ready"
systemctl start network-gateway.target &
fi
# Port redirection for printing happens in printergui module (iptables-helper rule)
####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 -s 192.168.0.0/16 -p tcp --dport 515 -j REDIRECT --to-port 5515
;;
deconfig)
check_env "$1"
if [ "$interface" = "$primary" ]; then
echo "Ignoring deconfig for primary interface"
else
echo 1 > "/proc/sys/net/ipv4/conf/$interface/promote_secondaries"
clientip=${ip%%:*}
ip addr del "$clientip/$(ipcalc -s -p "$clientip" "$subnet" | sed s/.*=//)" dev "$interface"
sed -i "/^$(escape_search "$ip")(\s|$)/d" /etc/hosts
fi
if [ -x /sbin/resolvconf ] && [ -L /etc/resolv.conf ] && [ -d /etc/resolvconf/update.d ]; then
# Automatic handling :-)
resolvconf -d "${interface}.udhcpc"
else
# Manual handling required :-(
rm -f -- "$THIS_RESOLV"
rebuild_resolv_conf
fi
;;
leasefail)
echo "$0: Lease failed: $message" >&2
;;
nak)
echo "$0: Received a NAK: $message" >&2
;;
*)
echo "$0: Unknown udhcpc command: $1" >&2
exit 1
;;
esac
exit 0
|