1 files changed, 208 insertions, 0 deletions
diff --git a/modules.d/slx-network/scripts/udhcpc-trigger.stage4 b/modules.d/slx-network/scripts/udhcpc-trigger.stage4
new file mode 100755
index 00000000..b4dfeafa
--- /dev/null
+++ b/modules.d/slx-network/scripts/udhcpc-trigger.stage4
@@ -0,0 +1,208 @@
+#!/bin/bash
+#
+# This script is triggered by udhcpc and handle the DHCP information
+# given to this script as parameters.
+
+export PATH=$PATH:/opt/openslx/sbin:/opt/openslx/bin
+
+. /opt/openslx/config
+
+if [ -z "$SLX_PXE_NETIF" ]; then
+	echo "Missing PXE network interface information."
+	exit 1
+fi
+
+MAIN_NETIF="$SLX_PXE_NETIF"
+[ -n "$SLX_VLAN_ID" ] && MAIN_NETIF="${SLX_PXE_NETIF}.${SLX_VLAN_ID}"
+[ -n "$SLX_BRIDGE" ]  && MAIN_NETIF="$SLX_BRIDGE"
+readonly MAIN_NETIF
+
+RESOLV_CONF="/opt/openslx/resolv.conf"
+THIS_RESOLV="/run/network/${MAIN_NETIF}.resolv"
+
+rebuild_resolv_conf () {
+	# Don't do anything if the active resolv.conf is not ours
+	# Also this will not run resolvconf update.d... No idea if we should still do so...
+	[ -L "/etc/resolv.conf" ] || return 0
+	[ "x$(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
+	# only run for the boot network interface
+	# TODO VLAN support
+	if [ "$interface" != "$MAIN_NETIF" ]; then
+		echo "Ignoring '$interface'..."
+		exit 1
+	fi
+}
+
+case "$1" in
+	bound|renew)
+		check_env "$1"
+		# Set address on interface
+		ip addr add "$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
+
+		# 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='$wins'" >> /opt/openslx/config
+		fi
+
+		# TODO find a better way to trigger additional code, hook dir?
+		# Update /etc/issue for proper spacing
+		[ -x "/opt/openslx/scripts/openslx-create_issue" ] && /opt/openslx/scripts/openslx-create_issue
+
+		# Remove any stray addresses; we expect the primary interface to only have one
+		# address supplied via DHCP. We do this after adding the new one, obviously.
+		rem_list=$( 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
+		
+		# 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
+