1 files changed, 119 insertions, 0 deletions
diff --git a/modules.d/slx-network/hooks/s3-parse-network-kcl.sh b/modules.d/slx-network/hooks/s3-parse-network-kcl.sh
new file mode 100755
index 00000000..daf2e9b7
--- /dev/null
+++ b/modules.d/slx-network/hooks/s3-parse-network-kcl.sh
@@ -0,0 +1,119 @@
+#!/bin/bash
+#
+# Script parsing the kernel command line to get the IP configuration from
+# (i)PXE. Supports either the older
+# ip=<CLIENT_IP>:<PXE_SERVER_IP>:<GATEWAY>:<NETMASK> format or our new format
+# consisting of 'ipv4.<attr>' key/value pairs. Valid attributes are: ip, router,
+# dns, hostname, domain, search, if, ntpsrv, subnet.
+
+command -v getarg >/dev/null || . /lib/dracut-lib.sh
+
+# static names for the boot interface and its bridge
+declare -rg bootif_name="boot0"
+declare -rg bridge_name="br0"
+
+# parse old syslinux style 'ip=...' and 'BOOTIF=...' parameters
+parse_kcl_ip() {
+	declare -g if="$(getarg BOOTIF=)"
+	if [ -n "$if" ] && [ ${#if} -eq 20 ]; then
+		if="${if#???}"
+		if="${if//-/:}"
+	fi
+	local ip_line="$(getarg ip=)"
+	[ -z "$ip_line" ] && return 0
+	read -r ip bootsrv router subnet \
+		<<< $( awk -F: '{print $1" "$2" "$3" "$4}' <<< "${ip_line}" )
+	declare -g ip bootsrv router subnet
+}
+
+# parse new style 'ipv4.*=...' parameters
+parse_kcl_ipv4() {
+	for param in "ip" "router" "dns" "hostname" "domain" "search" "if" "ntpsrv" "subnet"; do
+		local current="$(getarg ipv4.${param}=)"
+		echo "KCL '$param'='$current'"
+		[ -z "$current" ] && continue
+		declare -g "${param}=${current}"
+	done
+}
+
+parse_kcl() {
+	# we assume (and we should) that both variants contain the
+	# same information if they are present simultaneously.
+	parse_kcl_ip
+	parse_kcl_ipv4
+
+	# if not boot server was given, use slxsrv
+	if [ -z "$bootsrv" ]; then
+		kclsrv="$(getarg slxsrv=)"
+		if [ -n "$kclsrv" ]; then
+			declare -g bootsrv="$kclsrv"
+		fi
+	fi
+
+	# calculate network mask
+	declare -g mask="$(ipcalc -s -p "$ip" "$subnet" | sed 's/.*=//')"
+
+	# vlan specified?
+	declare -g vlan="$(getarg vlan=)"
+
+	# Bridged the boot interface?
+	grep -wqE 'bridged' /proc/cmdline && declare -g bridged="y"
+
+	# backwards compat for old style hostname/dns/domain
+	for conf in hostname dns domain; do
+		conf_value="$(getarg ${conf}=)"
+		if [ -n "$conf_value" ]; then
+			declare -g "${conf}=${conf_value}"
+		fi
+	done
+}
+
+save_network_config() {
+	declare -rg network_conf="/run/openslx/network.conf"
+	mkdir -p "${network_conf%/*}"
+	cat <<-EOF > "$network_conf"
+		SLX_PXE_CLIENT_IP='$ip'
+		SLX_PXE_SERVER_IP='$bootsrv'
+		SLX_PXE_GATEWAY='$router'
+		SLX_PXE_NETMASK='$mask'
+		SLX_PXE_SUBNET='$subnet'
+		SLX_PXE_MAC='$if'
+		SLX_PXE_NETIF='$bootif_name'
+		SLX_PXE_DNS='${dns//,/ }'
+		SLX_PXE_HOSTNAME='$hostname'
+		SLX_PXE_DOMAIN='${search//,/ }'
+		SLX_PXE_NTP='${ntpsrv//,/ }'
+		SLX_BRIDGE='${bridged:+${bridge_name}}'
+		SLX_VLAN_ID='$vlan'
+	EOF
+	echo "network.conf written."
+}
+
+# Create udev rule to rename the PXE boot interface to BOOTIF_NAME
+create_udev_bootif_name_rule() {
+	if [ -z "$if" ]; then
+		echo "MAC address of boot interface not set!"
+		return 1
+	fi
+  # priority 70 < 80-net-name-slot.rules.
+	echo 'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="'$if'", NAME="'$bootif_name'"' > /etc/udev/rules.d/70-pxe-boot-interface.rules
+}
+
+## MAIN ##
+parse_kcl
+
+if [ -z "$if" ]; then
+	emergency_shell "MAC address of primary interface not given on command line"
+	exit 1
+fi
+
+# Create the udev rule to rename the boot interface to the declared BOOTIF_NAME
+create_udev_bootif_name_rule &
+
+# Save network config for later use
+save_network_config &
+
+# set hostname asap
+[ -n "$hostname" ] && echo "$hostname" > /proc/sys/kernel/hostname
+
+wait