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author | Jonathan Bauer | 2019-07-24 11:37:31 +0200 |
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committer | Jonathan Bauer | 2019-07-24 11:37:31 +0200 |
commit | 5caba65f11cb8d890d90da4709dc488e7f2ad47c (patch) | |
tree | 45b8123908031e466a4b482c18935beb1936ad1b /builder/modules.d/slx-network/udhcpc-trigger | |
parent | [patches] remove dnbd3 hacky patch (diff) | |
download | systemd-init-5caba65f11cb8d890d90da4709dc488e7f2ad47c.tar.gz systemd-init-5caba65f11cb8d890d90da4709dc488e7f2ad47c.tar.xz systemd-init-5caba65f11cb8d890d90da4709dc488e7f2ad47c.zip |
[slx-network] introduce static network module
Diffstat (limited to 'builder/modules.d/slx-network/udhcpc-trigger')
-rwxr-xr-x | builder/modules.d/slx-network/udhcpc-trigger | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/builder/modules.d/slx-network/udhcpc-trigger b/builder/modules.d/slx-network/udhcpc-trigger new file mode 100755 index 00000000..0e531957 --- /dev/null +++ b/builder/modules.d/slx-network/udhcpc-trigger @@ -0,0 +1,114 @@ +#!/bin/ash + +exec >> /run/openslx/udhcpc-trigger.log +exec 2>> /run/openslx/udhcpc-trigger.log +set -x + +if [ "x$1" != "xbound" -a "x$1" != "xrenew" ] || [ "x$interface" != "xbr0" ] || [ -z "$ip" ]; then + exit 0 +fi + +NETWORK_CONF="/run/openslx/network.conf" + +. "$NETWORK_CONF" + +# If we already got an IP from KCL, see if it differs, and remove first if so +# We just try to prevent everything from breaking if the DHCP server doesn't +# objey the renew request by the client and hands out a new address +if [ -n "$SLX_PXE_CLIENT_IP" ]; then + #...some address is already configured... + if [ "x${SLX_PXE_CLIENT_IP}" != "x${ip}" ]; then + #...it's a different one, reconfigure... + echo "..reconfiguring ${SLX_PXE_CLIENT_IP} to ${ip}.." + # remove default route and let it be added again below, as it might get lost when changing the primary address on the interface + ip route del default 2>/dev/null + ip addr del "$SLX_PXE_CLIENT_IP" dev "${interface}" 2>/dev/null + ip addr add "${ip}/$(ipcalc -s -p "${ip}" "${subnet}" | sed s/.*=//)" dev "${interface}" + fi +else + #...no address configured yet, just add... + echo "..adding ${ip}.." + ip addr add "${ip}/$(ipcalc -s -p "${ip}" "${subnet}" | sed s/.*=//)" dev "${interface}" +fi +echo "SLX_DHCP_CLIENT_IP=$ip" >> "$NETWORK_CONF" + +# Same procedure for default gateway +if [ -n "${router}" ]; then + if [ -s "$SLX_PXE_GATEWAY" ]; then + if [ "x${SLX_PXE_GATEWAY}" != "x${router}" ]; then + echo "..reconfiguring default gw from ${SLX_PXE_GATEWAY} to ${router}.." + ip route del default 2>/dev/null + ip route add default via "$router" + fi + else + ip route add default via "$router" + fi + echo "SLX_DHCP_GATEWAY=$router" >> "$NETWORK_CONF" +fi + +rm -f -- "/etc/resolv.conf" + +# DNS/domain? +if [ -n "$dns" ]; then + echo "..got DNS.." + echo "# From DHCP in stage 3.1" >> "$NETWORK_CONF" + echo "SLX_DNS=$dns" >> "$NETWORK_CONF" +fi +for serv in $dns; do + echo "nameserver $serv" >> "/etc/resolv.conf" +done +if [ -z "$domain" ]; then + # try to get domain via reverse lookup if empty + echo "..trying to get domain via DNS, as DHCP didn't supply one.." + fqdn=$(timeout -t 3 nslookup "$ip" | grep -E "^Address +[0-9]+: +$ip " | head -n 1 | awk '{print $4}') + domain="${fqdn#*.}" +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="$domain" +fi +# Write out +if [ -n "$domain" ]; then + echo "domain $domain" >> "/etc/resolv.conf" + echo "SLX_NET_DOMAIN='$domain'" >> "/run/openslx/network.conf" +fi +if [ -n "$search" ]; then + echo "search $search" >> "/etc/resolv.conf" + echo "SLX_NET_SEARCH='$search'" >> "/run/openslx/network.conf" +fi + +if [ -n "$ntpsrv" ]; then + echo "SLX_DHCP_NTP='$ntpsrv'" >> "/run/openslx/network.conf" +fi + +# Hostname +if [ -z "$hostname" ]; then + # as with domain, if there's no hostname, try to get via DNS + echo "..trying to get hostname via DNS, as DHCP didn't supply one.." + [ -z "$fqdn" ] && fqdn=$(timeout -t 3 nslookup "$ip" | grep -E "^Address +[0-9]+: +$ip " | head -n 1 | awk '{print $4}') + hostname="${fqdn%%.*}" +elif [ -n "$domain" ]; then + fqdn="${hostname}.${domain%% *}" # in case domain is a list +fi + +if [ -z "$hostname" ]; then + # no fallback hostname from DNS, use IP address + hostname="${ip//./-}" +fi + +if [ -n "$hostname" ]; then + [ -z "$fqdn" ] && fqdn="$hostname" + echo "..setting hostname $hostname (fqdn: $fqdn).." + echo "$hostname" > "/proc/sys/kernel/hostname" + echo "$hostname" > "/etc/hostname" + echo "127.0.0.1 localhost" > "/etc/hosts" + echo "127.0.1.1 $fqdn $hostname" >> "/etc/hosts" + echo "SLX_HOSTNAME='$hostname'" >> "/run/openslx/network.conf" +fi + |