X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=components%2F9990-networking.sh;fp=components%2F9990-networking.sh;h=cdec92a98a963194f261e17075530e8f8a733a43;hb=a331218718282c5496ff062a0f6aa55908224862;hp=0000000000000000000000000000000000000000;hpb=0aa07bd386f516176364e710e8b9132036c72986;p=live-boot-grml.git

diff --git a/components/9990-networking.sh b/components/9990-networking.sh
new file mode 100755
index 0000000..cdec92a
--- /dev/null
+++ b/components/9990-networking.sh
@@ -0,0 +1,174 @@
+#!/bin/sh
+
+#set -e
+
+Device_from_bootif ()
+{
+	# support for Syslinux IPAPPEND parameter
+	# it sets the BOOTIF variable on the kernel parameter
+
+	if [ -n "${BOOTIF}" ]
+	then
+	# pxelinux sets BOOTIF to a value based on the mac address of the
+	# network card used to PXE boot, so use this value for DEVICE rather
+	# than a hard-coded device name from initramfs.conf. this facilitates
+	# network booting when machines may have multiple network cards.
+	# pxelinux sets BOOTIF to 01-$mac_address
+
+	# strip off the leading "01-", which isn't part of the mac
+	# address
+	temp_mac=${BOOTIF#*-}
+
+	# convert to typical mac address format by replacing "-" with ":"
+	bootif_mac=""
+	IFS='-'
+	for x in $temp_mac
+	do
+		if [ -z "$bootif_mac" ]
+		then
+			bootif_mac="$x"
+		else
+			bootif_mac="$bootif_mac:$x"
+		fi
+	done
+	unset IFS
+
+	# look for devices with matching mac address, and set DEVICE to
+	# appropriate value if match is found.
+
+	for device in /sys/class/net/*
+	do
+		if [ -f "$device/address" ]
+		then
+		current_mac=$(cat "$device/address")
+
+			if [ "$bootif_mac" = "$current_mac" ]
+			then
+				DEVICE=${device##*/}
+				break
+			fi
+		fi
+	done
+	fi
+
+}
+
+do_netsetup ()
+{
+	modprobe -q af_packet # For DHCP
+
+	udevadm trigger
+	udevadm settle
+
+	[ -n "$ETHDEV_TIMEOUT" ] || ETHDEV_TIMEOUT=15
+	echo "Using timeout of $ETHDEV_TIMEOUT seconds for network configuration."
+
+	if [ -z "${NETBOOT}" ] && [ -z "${FETCH}" ] && [ -z "${HTTPFS}" ] && [ -z "${FTPFS}" ]
+	then
+		# See if we can select the device from BOOTIF
+		Device_from_bootif
+
+		# if ethdevice was not specified on the kernel command line
+		# make sure we try to get a working network configuration
+		# for *every* present network device (except for loopback of course)
+		if [ -z "$ETHDEVICE" ]
+		then
+			echo "If you want to boot from a specific device use bootoption ethdevice=..."
+			for device in /sys/class/net/*
+			do
+				dev=${device##*/}
+				if [ "$dev" != "lo" ]
+				then
+					ETHDEVICE="$ETHDEVICE $dev"
+				fi
+			done
+		fi
+
+		# split args of ethdevice=eth0,eth1 into "eth0 eth1"
+		for device in $(echo $ETHDEVICE | sed 's/,/ /g')
+		do
+			devlist="$devlist $device"
+		done
+
+		# this is tricky (and ugly) because ipconfig sometimes just hangs/runs into
+		# an endless loop; if execution fails give it two further tries, that's
+		# why we use '$devlist $devlist $devlist' for the other for loop
+		for dev in $devlist $devlist $devlist
+		do
+			echo "Executing ipconfig -t $ETHDEV_TIMEOUT $dev"
+			ipconfig -t "$ETHDEV_TIMEOUT" $dev | tee -a /netboot.config &
+			jobid=$!
+			sleep "$ETHDEV_TIMEOUT" ; sleep 1
+			if [ -r /proc/"$jobid"/status ]
+			then
+				echo "Killing job $jobid for device $dev as ipconfig ran into recursion..."
+				kill -9 $jobid
+			fi
+
+			# if configuration of device worked we should have an assigned
+			# IP address, if so let's use the device as $DEVICE for later usage.
+			# simple and primitive approach which seems to work fine
+			if ifconfig $dev | grep -q 'inet.*addr:'
+			then
+				export DEVICE="$dev"
+				break
+			fi
+		done
+	else
+		for interface in ${DEVICE}; do
+			ipconfig -t "$ETHDEV_TIMEOUT" ${interface} | tee /netboot-${interface}.config
+
+			[ -e /run/net-${interface}.conf ] && . /run/net-${interface}.conf
+
+			if [ "$IPV4ADDR" != "0.0.0.0" ]
+			then
+				break
+			fi
+		done
+	fi
+
+	for interface in ${DEVICE}
+	do
+		# source relevant ipconfig output
+		OLDHOSTNAME=${HOSTNAME}
+
+		[ -e /run/net-${interface}.conf ] && . /run/net-${interface}.conf
+
+		[ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
+		export HOSTNAME
+
+		if [ -n "${interface}" ]
+		then
+			HWADDR="$(cat /sys/class/net/${interface}/address)"
+		fi
+
+		if [ ! -e "/etc/resolv.conf" ]
+		then
+			echo "Creating /etc/resolv.conf"
+
+			if [ -n "${DNSDOMAIN}" ]
+			then
+				echo "domain ${DNSDOMAIN}" > /etc/resolv.conf
+				echo "search ${DNSDOMAIN}" >> /etc/resolv.conf
+			fi
+
+			for i in ${IPV4DNS0} ${IPV4DNS1} ${IPV4DNS1}
+			do
+				if [ -n "$i" ] && [ "$i" != 0.0.0.0 ]
+				then
+					echo "nameserver $i" >> /etc/resolv.conf
+				fi
+			done
+		fi
+
+		# Check if we have a network device at all
+		if ! ls /sys/class/net/"$interface" > /dev/null 2>&1 && \
+		   ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
+		   ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
+		   ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
+		   ! ls /sys/class/net/ra0 > /dev/null 2>&1
+		then
+			panic "No supported network device found, maybe a non-mainline driver is required."
+		fi
+	done
+}