blob: 98421b78d10f0298dec8150eea5518428456c26f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
#!/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
#
# -----------------------------------------------------------------------------
export PATH=$PATH:/opt/openslx/sbin:/opt/openslx/bin
. /opt/openslx/config
primary="br0"
[ -n "$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
mkdir -p "/run/network"
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 "$router" ]; then
ip route replace default via "$router"
fi
# get domain, hostname and thus fqdn from DNS
dns_fqdn=$(busybox timeout -t 3 rdns "$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, TODO: check if we really want/need to overwrite the PXE_IP,
# it might be better/clearer to change the SLX_DHCP_CLIENT_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='$wins'" >> /opt/openslx/config
fi
# Update /etc/issue for proper spacing
/opt/openslx/scripts/openslx-create_issue
# Remove any stray addresses; we expect the primary interface to only have one
# address supplied via DHCP. We do this after adding the new one, obviously.
rem_list=$( 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"
# Write to openslx-config
echo "# Config written by openslx-dhcp-script (2)" >> /opt/openslx/config
sed -i "/^SLX_DNS=/d" /opt/openslx/config
echo "SLX_DNS='$dns'" >> /opt/openslx/config
;;
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
|
