From 37754e77e3c863675dba9cc0ac6c2c48eaf4a9f6 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Thu, 23 Jan 2014 16:17:25 +0100
Subject: <dhcp> Add Targets network-dns and network-gateway

These trigger if a dns server / default route has been configured via DHCP.
This would probably only be interesting for dual homed clients (which we
currently do not have in production), since the boot interface (br0) might
not be the one we access the outside world with.
In cases where you only have one nic, it will be enough to wait for the network
target if you need full network/internet/resolving.
---
 .../data/opt/openslx/scripts/udhcpc-openslx        | 41 +++++++++++++---------
 1 file changed, 25 insertions(+), 16 deletions(-)

(limited to 'remote/modules')

diff --git a/remote/modules/dhcpc-busybox/data/opt/openslx/scripts/udhcpc-openslx b/remote/modules/dhcpc-busybox/data/opt/openslx/scripts/udhcpc-openslx
index 00d22ba5..93287af8 100755
--- a/remote/modules/dhcpc-busybox/data/opt/openslx/scripts/udhcpc-openslx
+++ b/remote/modules/dhcpc-busybox/data/opt/openslx/scripts/udhcpc-openslx
@@ -78,7 +78,7 @@ case "$1" in
 			printf -v CONF "${CONF}nameserver $i\n"
 		done
 		
-		if [ -x /sbin/resolvconf ] && [ -L /etc/resolv.conf ] && [ -d /etc/resolvconf/update.d ]; then
+		if [ -x "/sbin/resolvconf" ] && [ -L "/etc/resolv.conf" ] && [ -d "/etc/resolvconf/update.d" ]; then
 			# Automatic handling :-)
 			resolvconf --create-runtime-directories
 			resolvconf --enable-updates
@@ -91,13 +91,13 @@ case "$1" in
 		
 		# Things that should only happen for the main interface that was used for booting
 		if [ "$interface" == "br0" ]; then
+			dns_host=$(rdns "$ip")
 			# Update IP
 			sed -i "s/^\(SLX_PXE_CLIENT_IP=\).*$/\1'$ip'/" /opt/openslx/config
 			
 			# Only if network is not ready yet
 			if [ ! -e "/run/udhcpc/network-ready" ]; then
 				# Update hostname
-				dns_host=$(rdns "$ip")
 				if [ -z "$dns_host" ]; then
 					# fallback to what the dhcp told us
 					dns_host="$hostname"
@@ -106,6 +106,7 @@ case "$1" in
 					# only if there is no /etc/hostname, we fall back (far back, that is)
 					[ ! -s "/etc/hostname" ] && dns_host="slx-client"
 				fi
+				# finally, if dns_host was set to anything, apply it
 				if [ -n "$dns_host" ]; then
 					echo "$dns_host" > "/proc/sys/kernel/hostname"
 					echo "$dns_host" > "/etc/hostname"
@@ -129,11 +130,14 @@ case "$1" in
 				fi
 				# Update /etc/issue for proper spacing
 				/opt/openslx/scripts/openslx-create_issue
-			fi
-		fi
+				touch "/run/udhcpc/network-ready"
+				# Mark network target as reached
+				systemctl start network.target &
+			fi # end "network not ready yet"
+		fi # end "br0 only"
 		
 		# Hostname in /etc/hosts
-		touch /etc/hosts
+		touch "/etc/hosts"
 		hostlist=""
 		[ -n "$dns_host" ] && hostlist="$dns_host"
 		[ -n "$hostname" -a "x$hostname" != "x$dns_host" ] && hostlist="$hostlist $hostname"
@@ -150,25 +154,30 @@ case "$1" in
 				fi
 			done
 		fi
-		# Get rid of orphaned lines
+		# Get rid of orphaned lines in /etc/hosts
 		sed -i -r '/^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+\s*$/d' /etc/hosts
 		
-		# We consider the network setup to be complete if an interface is being configured that
-		# has a default route and some dns servers set.
-		if [ -n "$router" ] && [ -n "$dns" ] && [ ! -e "/run/udhcpc/network-ready" ]; then
-			touch "/run/udhcpc/network-ready"
+		# "dns ready" target
+		if [ -n "$dns" ] && [ ! -e "/run/udhcpc/dns-ready" ]; then
+			touch "/run/udhcpc/dns-ready"
 			# Write to openslx-config
 			echo "# Config written by openslx-dhcp-script (2)" >> /opt/openslx/config
 			echo "SLX_DNS='$dns'" >> /opt/openslx/config
-			
-			# Mark network target as reached
-			systemctl start network.target &
-			# Port redirection for printing happens in printergui modules (iptables-helper rule)
+			systemctl start network-dns.target &
+		fi
+		# "default route exists" target
+		if [ -n "$router" ] && [ ! -e "/run/udhcpc/routing-ready" ]; then
+			touch "/run/udhcpc/routing-ready"
+			# Write to openslx-config
+			echo "# Config written by openslx-dhcp-script (3)" >> /opt/openslx/config
+			echo "SLX_DNS='$dns'" >> /opt/openslx/config
+			systemctl start network-gateway.target &
+		fi
+		
+			# Port redirection for printing happens in printergui module (iptables-helper rule)
 			####iptables -A INPUT -i br0 -p tcp --dport 515 -j DROP
 			####iptables -A INPUT -i br0 -p tcp --dport 5515 -j DROP
 			####iptables -t nat -A PREROUTING -s 192.168.0.0/16 -p tcp --dport 515 -j REDIRECT --to-port 5515
-		fi
-		
 	;;
 	
 	deconfig)
-- 
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