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-rwxr-xr-xmodules.d/slx-network/scripts/udhcpc-trigger.stage3139
1 files changed, 70 insertions, 69 deletions
diff --git a/modules.d/slx-network/scripts/udhcpc-trigger.stage3 b/modules.d/slx-network/scripts/udhcpc-trigger.stage3
index 664600a6..fa771868 100755
--- a/modules.d/slx-network/scripts/udhcpc-trigger.stage3
+++ b/modules.d/slx-network/scripts/udhcpc-trigger.stage3
@@ -15,11 +15,15 @@ MAIN_NETIF="$SLX_PXE_NETIF"
readonly MAIN_NETIF
if [[ "$1" != "bound" && "$1" != "renew" ]] \
- || [ "$interface" != "${MAIN_NETIF}" ] \
- || [ -z "$ip" ]; then
+ || [ "$interface" != "${MAIN_NETIF}" ] \
+ || [ -z "$ip" ]; then
exit 0
fi
+log() {
+ echo "${MAIN_NETIF}: $*"
+}
+
##
## CORE NETWORK CONFIGURATION
##
@@ -30,16 +34,16 @@ fi
# objey the renew request by the client and hands out a new address
if [ -n "$SLX_PXE_CLIENT_IP" ]; then
#...some address is already configured...
- if [ "x${SLX_PXE_CLIENT_IP}" != "x${ip}" ]; then
+ if [ "${SLX_PXE_CLIENT_IP}" != "${ip}" ]; then
#...it's a different one, reconfigure...
- echo "..reconfiguring '${SLX_PXE_CLIENT_IP}' to '${ip}'."
+ log "reconfiguring from '${SLX_PXE_CLIENT_IP}' to '${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 route del default
+ ip addr del "$SLX_PXE_CLIENT_IP" dev "${interface}"
fi
else
#...no address configured yet, just add...
- echo "..adding ${ip}.."
+ log "adding ${ip}"
fi
if ! ip addr show dev "${interface}" | grep -qF "inet ${ip}/"; then
ip addr add "${ip}/$(ipcalc -s -p "${ip}" "${subnet}" | sed s/.*=//)" dev "${interface}"
@@ -49,10 +53,10 @@ fi
# Same procedure for default gateway
if [ -n "$router" ]; then
if [ -n "$SLX_PXE_GATEWAY" ] && [ "$SLX_PXE_GATEWAY" != "$router" ]; then
- echo "..reconfiguring default gw from '$SLX_PXE_GATEWAY' to '$router'."
- ip route del default 2>/dev/null
+ log "reconfiguring default gw from '$SLX_PXE_GATEWAY' to '$router'"
+ ip route del default
fi
- ip route add default via "$router"
+ ip route add default via "$router" dev "${MAIN_NETIF}"
echo "SLX_DHCP_GATEWAY='$router'" >> "$NETWORK_CONF"
fi
@@ -67,9 +71,9 @@ reverse_lookup() {
[ -z "$dns" ] && return
[ -z "$1" ] && return
timeout 3 nslookup "$1" | awk '{
- if ($2 == "name") { print $4; exit; }
+ if ($2 == "name") { print gensub("\.$", "", "", $4); exit; }
if ($1 == "Name:") { ok = 1 }
- if (ok && $1 == "Address") { print $4; exit; }
+ if (ok && $1 == "Address") { print gensub("\.$", "", "", $4); exit; }
}'
}
@@ -77,34 +81,61 @@ echo "# From DHCP in stage 3.1" >> "$NETWORK_CONF"
# DNS/domain?
if [ -n "$dns" ]; then
- echo "..got DNS.."
+ log "DNS servers: $dns"
echo "SLX_DNS='$dns'" >> "$NETWORK_CONF"
+ for srv in $dns; do
+ echo "nameserver $srv" >> "/etc/resolv.conf"
+ done
+else
+ dns="$( < /etc/resolv.conf awk '$1 == "nameserver" {printf "%s ", $2}' )"
fi
-for srv in $dns; do
- echo "nameserver $srv" >> "/etc/resolv.conf"
-done
# always check DNS
-echo "Checking DNS record for this host..."
-[ -z "$fqdn" ] && fqdn="$(reverse_lookup "$ip")"
+log "checking reverse DNS record for this host"
+[ -n "$fqdn" ] && [[ "$fqdn" != *.* ]] && fqdn=
+[ -z "$fqdn" ] && fqdn="$( reverse_lookup "$ip" )"
[ -z "$fqdn" ] && [ -n "$hostname" ] && [ -n "$domain" ] && fqdn="${hostname}.${domain}"
-# Otherwise, retry DNS one time
+
+# retry DNS one time
if [ -z "$fqdn" ]; then
+ log "found no way to generate FQDN, trying reverse lookup one more time"
sleep 1
- fqdn="$(reverse_lookup "$ip")"
+ fqdn="$( reverse_lookup "$ip" )"
+fi
+if [ -n "$fqdn" ]; then
+ fqdn_hostname="${fqdn%%.*}"
+ fqdn_domain="${fqdn#*.}"
fi
-[ -n "$fqdn" ] && fqdn_hostname="${fqdn%%.*}"
-if [ -z "$domain" ]; then
- echo "Getting domain via DNS, as DHCP didn't supply one.."
- domain="${fqdn#*.}"
+if [ -z "$hostname" ] && [ -n "$fqdn_hostname" ]; then
+ hostname="${fqdn_hostname}"
+ log "using hostname from DNS, as DHCP didn't supply one"
+fi
+if [ -z "$hostname" ] && [ -n "$SLX_PXE_HOSTNAME" ]; then
+ hostname="$SLX_PXE_HOSTNAME"
+ log "using hostname from KCL, as DHCP/DNS didn't supply one"
+fi
+if [ -z "$hostname" ]; then
+ hostname="noname-${ip//./-}"
+ log "got no hostname via DHCP, DNS or KCL, using fallback '$hostname'"
+fi
+if [ -z "$domain" ] && [ -n "$fqdn_domain" ]; then
+ domain="${fqdn_domain}"
+ log "using domain from DNS, as DHCP didn't supply one"
fi
+domain="${domain%% *}" # in case domain is a list, some DHCP servers did that in the past instead of using search
+
+# Normalize to lowercase
+for var in hostname domain fqdn search fqdn_hostname fqdn_domain SLX_PXE_HOSTNAME; do
+ declare "$var"="${!var~~}"
+done
+
# Add domain to list of search domains if not in there yet
if [ -n "$domain" ] && [ -n "$search" ]; then
FOUND=no
for sd in $search; do
- [ "x$sd" = "x$domain" ] && FOUND=yes
+ [ "$sd" = "$domain" ] && FOUND=yes
done
[ "$FOUND" = "no" ] && search="$domain $search"
elif [ -n "$domain" ]; then
@@ -126,51 +157,21 @@ if [ -n "$ntpsrv" ]; then
echo "SLX_DHCP_NTP='$ntpsrv'" >> "$NETWORK_CONF"
fi
-# Hostname
-if [ -n "$hostname" ]; then
- if [ -n "$SLX_PXE_HOSTNAME" ] && [ "$hostname" != "$SLX_PXE_HOSTNAME" ]; then
- echo "KCL and DHCP hostnames differ... assuming some KCL hack."
- echo " -> Prefering KCL: '$SLX_PXE_HOSTNAME'."
- hostname="$SLX_PXE_HOSTNAME"
- fi
- if [ -n "$fqdn_hostname" ] && [ "$hostname" != "$fqdn_hostname" ]; then
- echo "DHCP hostname differs from DNS hostname."
- echo " -> Prefering DNS: '$fqdn_hostname'."
- hostname="$fqdn_hostname"
- fi
-else
- echo "No hostname specified in DHCP, checking DNS record."
- # We ignore the corner case where DHCP didn't supply a hostname but
- # there is a hardcoded one via KCL as it seems unlikely, log it nonetheless
- if [ -n "$SLX_PXE_HOSTNAME" ]; then
- echo "DHCP didn't supply a hostname but one was supplied by KCL?" \
- "This seems strange but using KCL hostname anyways."
- hostname="$SLX_PXE_HOSTNAME"
- else
- # regular fallback to DNS and noname-* if needed
- if [ -n "$fqdn_hostname" ]; then
- echo "Using DNS record hostname: '$fqdn_hostname'."
- hostname="$fqdn_hostname"
- else
- # no fallback hostname from DNS, use IP address
- hostname="noname-${ip//./-}"
- fqdn="${hostname}.invalid"
- fi
- if [ -n "$domain" ]; then
- fqdn="${hostname}.${domain%% *}" # in case domain is a list
- fi
- fi
-fi
+declare -a localnames=()
+[ -n "$fqdn" ] && localnames+=( "$fqdn" )
+[ -n "$hostname" ] && localnames+=( "$hostname" )
+[ -n "$fqdn_hostname" ] && [ "$hostname" != "$fqdn_hostname" ] && localnames+=( "$fqdn_hostname" )
+[ -n "$SLX_PXE_HOSTNAME" ] && [ "$hostname" != "$SLX_PXE_HOSTNAME" ] && localnames+=( "$SLX_PXE_HOSTNAME" )
-if [ -n "$hostname" ]; then
- [ -z "$fqdn" ] && fqdn="$hostname"
- echo "..setting hostname $hostname (fqdn: $fqdn).."
- echo "$hostname" > "/proc/sys/kernel/hostname"
- echo "$hostname" > "/etc/hostname"
- echo "127.0.0.1 localhost" > "/etc/hosts"
- echo "$ip $fqdn $hostname" >> "/etc/hosts"
- echo "SLX_HOSTNAME='$hostname'" >> "$NETWORK_CONF"
-fi
+{
+echo "127.0.0.1 localhost"
+echo "127.0.1.1 ${localnames[*]}"
+} > "/etc/hosts"
+
+log "setting hostname $hostname, FQDN $fqdn"
+echo "$hostname" > "/proc/sys/kernel/hostname"
+echo "$hostname" > "/etc/hostname"
+echo "SLX_HOSTNAME='$hostname'" >> "$NETWORK_CONF"
touch /.network
set +x