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Diffstat (limited to 'pxeserver')
| -rwxr-xr-x | pxeserver | 712 |
1 files changed, 712 insertions, 0 deletions
diff --git a/pxeserver b/pxeserver new file mode 100755 index 0000000..3ec9370 --- /dev/null +++ b/pxeserver @@ -0,0 +1,712 @@ +#!/bin/sh +# +# Copyright 2011, 2016 Eric Hameleers, Eindhoven, NL +# Copyright 2011 Patrick Volkerding, Sebeka, Minnesota USA +# All rights reserved. +# +# Redistribution and use of this script, with or without modification, is +# permitted provided that the following conditions are met: +# +# 1. Redistributions of this script must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# +# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED +# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO +# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; +# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, +# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR +# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +# +# Code used from SeTpxe and SeTnet scripts, part of the Slackware installer. +# --------------------------------------------------------------------------- + +# PXEserver works as follows: +# - It requires a wired network; wireless PXE boot is impossible. +# - The pxeserver script tries to find a wired interface; you can pass an +# explicit interfacename as parameter to the script (optional). +# - If multiple wired interfaces are detected, a dialog asks the user to +# select the right one. +# - A check is done for DHCP configuration of this wired interface; +# * If DHCP configuration is found then pxeserver will not start its own +# DHCP server and instead will rely on your LAN's DHCP server. +# * If no DHCP config is found, the script will ask permission to start +# its own internal DHCP server. +# Additionally the user will be prompted to configure an IP address for the +# network interface and IP range properties for the internal DHCP server. +# - The script will then start the PXE server, comprising of: +# * dnsmasq providing DNS, DHCP and BOOTP; +# * NFS and RPC daemons; +# - The script will detect if you have an outside network connection on +# another interface and will enable IP forwarding if needed, so that the +# PXE clients will also have network access. +# - The Live OS booted via pxelinux is configured with additional boot +# parameters: +# * nfsroot=${LOCAL_IPADDR}:/mnt/livemedia +# * luksvol= +# * nop +# * hostname=@DISTRO@ +# * tz=$(cat /etc/timezone) +# * locale=${SYSLANG:-"en_US.UTF-8"} +# * kbd=${KBD:-"us"} +# Which shows that the configuration of the Live OS where the PXE server +# runs is largely determining the configuration of the PXE clients. +# - Note that when networkbooting, the hostname of the Live OS will be +# suffixed with the machine's MAC address to make every network-booted +# Live OS unique. + +# +# Initialization: +# + +DEBUG=${DEBUG:-0} +DIALOG=dialog + +# Number of PXE clients we want to serve with our own DHCP server: +DEF_DHCP_RANGE=${DEF_DHCP_RANGE:-10} + +# Optional argument to the script is the name of the interface on which +# the PXE server should run: +INTERFACE="$1" + +# This variable will be used to determine if the network default gateway +# is reached through a second NIC in the computer, or not. +GLOBAL_GW_INT="" + +# In the above case, the global and local gateways will not be equal. +GLOBAL_GATEWAY="" +LOCAL_GATEWAY="" + +# The Slackware setup depends on english language settings because it +# parses program output like that of "fdisk -l". So, we need to override +# the Live user's local language settings here: +SYSLANG=$LANG +export LANG=C +export LC_ALL=C + +# Warn the user if the Live Media is inaccessible (however unlikely): +if [ ! -d /mnt/livemedia/@LIVEMAIN@/system ]; then + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "LIVE MEDIA NOT ACCESSIBLE" --msgbox "\ +\n\ +Before you can install software, complete the following tasks:\n\ +\n\ +1. Mount your Live media partition on /mnt/livemedia." 16 68 + exit 1 +fi + +TMP=/var/log/setup/tmp +if [ ! -d $TMP ]; then + mkdir -p $TMP +fi +rm -f $TMP/SeT* +echo "on" > $TMP/SeTcolor # turn on color menus +PATH="$PATH:/usr/share/@LIVEMAIN@" +export PATH; +export COLOR=on + +# Add some eye candy for PXE clients: +if [ -d /mnt/livemedia/boot/syslinux ]; then + PXETXTSRC=/mnt/livemedia/boot/syslinux +elif [ -d /mnt/livemedia/boot/extlinux ]; then + PXETXTSRC=/mnt/livemedia/boot/extlinux +else + PXETXTSRC="" +fi +if [ -n "$PXETXTSRC" ]; then + ln -s ${PXETXTSRC}/message.txt /var/lib/tftpboot/ + ln -s ${PXETXTSRC}/f2.txt /var/lib/tftpboot/ + ln -s ${PXETXTSRC}/f3.txt /var/lib/tftpboot/ + ln -s ${PXETXTSRC}/f4.txt /var/lib/tftpboot/ +fi + +# +# Function definitions: +# + +# Function to convert the netmask from CIDR format to dot notation. +cidr_cvt() { + # Number of args to shift, 255..255, first non-255 byte, zeroes + set -- $(( 5 - ($1 / 8) )) 255 255 255 255 $(( (255 << (8 - ($1 % 8))) & 255 )) 0 0 0 + [ $1 -gt 1 ] && shift $1 || shift + echo ${1-0}.${2-0}.${3-0}.${4-0} +} + +# Function to convert the netmask from dot notation to CIDR format. +mask_cvt () +{ + # Assumes there's no "255." after a non-255 byte in the mask + local x=${1##*255.} + set -- 0^^^128^192^224^240^248^252^254^ $(( (${#1} - ${#x})*2 )) ${x%%.*} + x=${1%%$3*} + echo $(( $2 + (${#x}/4) )) +} + +# IP Address to integer conversion: +ip_to_int() { + IFS=. + set -f + set -- $1 + echo $(($1 << 24 | $2 << 16 | $3 << 8 | $4)) +} + +# Integer to IP Address conversion: +int_to_ip() { + echo $(($1>>24)).$(($1>>16&0xff)).$(($1>>8&0xff)).$(($1&0xff)) +} + +# The network interface IP configuration routine. +# Will be called if the interface was not configured by DHCP. +# It ends with a configured network interface: +devconfig() { + # Function accepts a parameter; if not given, use the global INTERFACE: + MYIF=${1:-"$INTERFACE"} + + # Determine a LAN range we are going to be using for the internal DHCP + # range that does not conflict with existing IP configuration: + if ! ip -f inet -o addr show |grep -v " lo " |grep -qw 192.168 ; then + MYIP="192.168.10.10" + elif ! ip -f inet -o addr show |grep -v " lo " |grep -qw 172.16 ; then + MYIP="172.16.10.10" + else + MYIP="10.10.10.10" + fi + + # Main loop IP configuration: + while [ 0 ]; do + + cat << EOF > $TMP/tempmsg + +You will need to enter the IP address you wish to +assign to interface ${MYIF}. Example: ${MYIP} + +What is your IP address? +EOF + if [ "x$LOCAL_IPADDR" = "x" ]; then # assign default + LOCAL_IPADDR=${MYIP} + fi + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "ASSIGN IP ADDRESS" --inputbox "$(cat $TMP/tempmsg)" 12 \ + 65 $LOCAL_IPADDR 2> $TMP/local + if [ ! $? = 0 ]; then + rm -f $TMP/tempmsg $TMP/local + return + fi + LOCAL_IPADDR="$(cat $TMP/local)" + rm -f $TMP/local + clear + cat << EOF > $TMP/tempmsg + +Now we need to know your netmask. +Typically this will be 255.255.255.0 +but this can be different depending on +your local setup. + +What is your netmask? +EOF + if [ "x$LOCAL_NETMASK" = "x" ]; then # assign default + LOCAL_NETMASK=${NETMASK:-255.255.255.0} + fi + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "ASSIGN NETMASK" --inputbox "$(cat $TMP/tempmsg)" 14 \ + 65 $LOCAL_NETMASK 2> $TMP/mask + if [ ! $? = 0 ]; then + rm -f $TMP/tempmsg $TMP/mask + return + fi + clear + LOCAL_NETMASK="$(cat $TMP/mask)" + rm $TMP/mask + + # GLOBAL_GATEWAY was determined right before calling this function: + if [ "x$GLOBAL_GATEWAY" = "x" ]; then + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --yesno "Do you have a gateway?" 5 30 + HAVE_GATEWAY=$? + clear + if [ $HAVE_GATEWAY -eq 0 ]; then + LOCAL_GATEWAY="$(echo $LOCAL_IPADDR | cut -f1-3 -d '.')." + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "ASSIGN GATEWAY ADDRESS" --inputbox \ + "\nWhat is the IP address for your gateway?" 9 65 \ + $LOCAL_GATEWAY 2> $TMP/gw + if [ ! $? = 0 ]; then + rm -f $TMP/tempmsg $TMP/gw + LOCAL_GATEWAY="" + else + LOCAL_GATEWAY="$(cat $TMP/gw)" + rm -f $TMP/gw + fi + fi + unset HAVE_GATEWAY + clear + elif [ "$GLOBAL_GW_INT" = "$MYIF" ]; then + LOCAL_GATEWAY=$GLOBAL_GATEWAY + fi + + cat << EOF > $TMP/tempmsg + +This is the proposed network configuration for $MYIF - +If this is OK, then select 'Yes'. +If this is not OK and you want to configure again, select 'No'. + +* IP Address: $LOCAL_IPADDR +* Netmask: $LOCAL_NETMASK +* Gateway: ${LOCAL_GATEWAY:-"$GLOBAL_GATEWAY (via $GLOBAL_GW_INT)"} +EOF + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --no-collapse --title "NETWORK CONFIGURATION" \ + --yesno "$(cat $TMP/tempmsg)" 14 68 + if [ $? -eq 1 ]; then + continue # New round of questions + fi + + #echo "Configuring ethernet card..." + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "INITIALIZING NETWORK" --infobox \ + "\nConfiguring your network interface $MYIF ..." 5 56 + + # We don't need this anymore: + dhcpcd -k $MYIF 1>/dev/null 2>&1 + rm -f /run/dhcpcd/dhcpcd-${MYIF}.pid + + # Broadcast and network are derived from IP and netmask: + LOCAL_BROADCAST=$(ipmask $LOCAL_NETMASK $LOCAL_IPADDR | cut -f 1 -d ' ') + LOCAL_NETWORK=$(ipmask $LOCAL_NETMASK $LOCAL_IPADDR | cut -f 2 -d ' ') + if [ -x /etc/rc.d/rc.networkmanager 2>/dev/null ]; then + # Use nmcli to reconfigure NetworkManager: + nmcli con add con-name pxe-${MYIF} ifname ${MYIF} type ethernet ip4 $LOCAL_IPADDR/$(mask_cvt $LOCAL_NETMASK) + if [ "x$GLOBAL_GATEWAY" = "x" -a "x$LOCAL_GATEWAY" != "x" ]; then + nmcli con mod pxe-${MYIF} ipv4.gateway $LOCAL_GATEWAY + fi + nmcli dev connect ${MYIF} + else + # Use ifconfig and route commands: + ifconfig $MYIF $LOCAL_IPADDR netmask $LOCAL_NETMASK broadcast $LOCAL_BROADCAST + if [ "x$GLOBAL_GATEWAY" = "x" -a "x$LOCAL_GATEWAY" != "x" ]; then + #echo "Configuring your gateway..." + route add default gw $LOCAL_GATEWAY metric 1 + fi + fi + echo $LOCAL_IPADDR > $TMP/SeTIP + echo $LOCAL_NETMASK > $TMP/SeTnetmask + echo $LOCAL_GATEWAY > $TMP/SeTgateway + clear + break + + done # end main loop IP configuration + +} # end devconfig() + +# The PXE Server configuration routine: +pxeconfig() { + + # This function accepts a parameter (network interface to configure). + # If no name was passed, we will do our best to find out ourselves. + + # Create empty PXE configuration file: + echo "" > $TMP/SeTpxe + + # Find out what interface we should be using. + # Did we get one passed as a parameter? + if [ "x$1" = "x" ]; then + # No parameter or it was empty; find out if we have a wired interface: + WIRED_INT="" + IINT=0 + for WINT in $(ls --indicator-style=none /sys/class/net |grep -v ^lo); do + if ! grep -q $WINT /proc/net/wireless ; then + WIRED_INT="$WIRED_INT $WINT" + IINT=$(( $IINT + 1 )) + fi + done + if [ $IINT -eq 0 ]; then + # Zero wired interfaces found - exit. + cat <<EOF > $TMP/tempmsg + +Could not find a wired network interface. \n\ +A PXE Server needs a configured network interface to work.\n\ + +EOF + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "MISSING NETWORK DEVICE" --msgbox "$(cat $TMP/tempmsg)" +8 68 + rm -f $TMP/tempmsg + exit 1 + elif [ $IINT -eq 1 ]; then + # Exactly one wired interfaces found - use it. + INTERFACE=$(echo $WIRED_INT) # get rid of the space + else + # Multiple wired interfaces found - let the user select one: + rm -f $TMP/iflist + for WINT in $WIRED_INT ; do + DRIVERTXT="IP=$(ip -f inet -o addr show ${WINT} |tr -s ' ' |head -1 |cut - f4 -d' ' |cut -f1 -d/)" + if cat /sys/class/net/$WINT/device/uevent 1>/dev/null 2>/dev/null ; then + DRIVERTXT="$DRIVERTXT driver=$(grep "DRIVER=" /sys/class/net/$WINT/device/uevent |cut -f2 -d=)" + fi + echo "$WINT \"network interface ($DRIVERTXT)\"" >> $TMP/iflist + done + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "SELECT NETWORK INTERFACE" \ + --menu \ +"Select an option below using the UP/DOWN keys and SPACE or ENTER.\n\ +Alternate keys may also be used: '+', '-', and TAB." 13 72 9 \ + --file $TMP/iflist \ + 2> $TMP/intset + INTERFACE="$(cat $TMP/intset)" + rm $TMP/intset $TMP/iflist + fi + fi # End undefined INTERFACE + + # + # We now know what network interface to use. + # + + # If dhcpcd is running, it likely has a lease from a LAN DHCP server, + # so we should not activate another DHCP server ourselves now: + if [ -s /run/dhcpcd/dhcpcd-${INTERFACE}.pid -a -n "$(ps -q $(cat /run/dhcpcd/dhcpcd-${INTERFACE}.pid) -o comm=)" ]; then + OWNDHCP="no" + else + # Assume nothing... we will ask the user for confirmation later! + OWNDHCP="yes" + fi + + # If $INTERFACE != $GLOBAL_GW_INT then we are dealing with a dual-nic setup + # and later on we can suggest configuring (NAT) routing: + GLOBAL_GW_INT=$(ip -f inet -o route show default |grep -v linkdown |head -1 |tr -s ' ' |cut -f5 -d' ') + GLOBAL_GATEWAY=$(ip -f inet -o route show default |grep -v linkdown |head -1 |tr -s ' ' |cut -f3 -d' ') + + # + # Start the interactive part: + # + + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --backtitle "@CDISTRO@ Linux Live PXE Server." \ + --title "WELCOME TO PXE CONFIGURATION" --msgbox "\ +We will be asking you a few questions now.\n\ +The answers will be used to start a PXE service on this computer \ +which does not interfere with other services in your network.\ +\n\ +The only assumption is, that there is NO PXE service already \ +running on your local network at this moment. +\n\ +If in doubt, stick with the defaults." 0 0 + + if [ "$OWNDHCP" = "yes" ]; then + # Be extra safe. Do not start a DHCP server if the user denies it: + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "ENABLE DHCP SERVER" --yesno " \ +Network interface ${INTERFACE} did not get an IP address from a DHCP server. \ +Slackware's PXE server starting on ${INTERFACE} needs a working DHCP server.\n\ +Do you want this computer to start its own DHCP server on ${INTERFACE} \ +(you can control what IP addresses are used by the DHCP server)?\n\ +Say 'YES' if you are certain your network interface ${INTERFACE} is +not in reach of any DHCP server." 9 68 + if [ $? = 0 ]; then + OWNDHCP="yes" + else + OWNDHCP="no" + fi + fi + + # Assemble the network parameters: + LOCAL_IPADDR=$(ip -f inet -o addr show ${INTERFACE} |tr -s ' ' |head -1 |cut -f4 -d' ' |cut -f1 -d/) + if [ "x$LOCAL_IPADDR" = "x" ]; then # no IP Address was configured?!? + cat <<EOF > $TMP/tempmsg + +Next step is to define an IP address for network interface ${INTERFACE}. \n\ +A PXE Server needs a configured network interface to work.\n\ + +EOF + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "UNCONFIGURED NETWORK DEVICE" --msgbox "$(cat $TMP/tempmsg)" 9 68 + rm -f $TMP/tempmsg + # Run the static IP configuration routine for $INTERFACE: + devconfig ${INTERFACE} + else + # DHCP configured interface, we assume that the default gaeway is here. + LOCAL_GATEWAY=$GLOBAL_GATEWAY + fi + + # OK we have an IP Address, let's continue. + LOCAL_NETMASK=$(ip -f inet -o addr show ${INTERFACE} |tr -s ' ' |head -1 |cut -f4 -d' ' |cut -f2 -d/) + LOCAL_NETMASK=$(cidr_cvt $LOCAL_NETMASK) + LOCAL_BROADCAST=$(ipmask $LOCAL_NETMASK $LOCAL_IPADDR |cut -f 1 -d ' ') + LOCAL_NETWORK=$(ipmask $LOCAL_NETMASK $LOCAL_IPADDR |cut -f 2 -d ' ') + + if [ "$OWNDHCP" = "yes" ]; then + # Find out a suitable IP address range for the DHCP server. Involves magic: + I_LOCAL_IPADDR=$(ip_to_int "$LOCAL_IPADDR") + I_LOCAL_NETMASK=$(ip_to_int "$LOCAL_NETMASK") + I_MINLEASE_IP=$(( ($I_LOCAL_IPADDR & $I_LOCAL_NETMASK) + 1 )) + I_MAXLEASE_IP=$(( ($I_LOCAL_IPADDR | ${I_LOCAL_NETMASK}^0xffffffff) - 1 )) + if [ $(( $I_MAXLEASE_IP - $I_LOCAL_IPADDR )) -ge $DEF_DHCP_RANGE ]; then + # Use $DEF_DHCP_RANGE IP addresses in the top of the address range: + I_MINLEASE_IP=$(( $I_MAXLEASE_IP - $(($DEF_DHCP_RANGE - 1)) )) + elif [ $(($I_LOCAL_IPADDR - $I_MINLEASE_IP)) -ge $DEF_DHCP_RANGE ]; then + # Use $DEF_DHCP_RANGE IP addresses in the bottom of the address range: + I_MAXLEASE_IP=$(( $I_MINLEASE_IP + $(($DEF_DHCP_RANGE - 1)) )) + else + # Smaller range available than we wanted, use what we can get: + I_MINLEASE_IP=$(( $I_LOCAL_IPADDR + 1 )) + fi + + MINLEASE_IP=$(int_to_ip "$I_MINLEASE_IP") + MAXLEASE_IP=$(int_to_ip "$I_MAXLEASE_IP") + + while [ 0 ]; do + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + ( $DIALOG --stdout --backtitle "@CDISTRO@ Linux Live PXE Server." \ + --title "DHCP SERVER CONFIGURATION" \ + --cancel-label Restart \ + --form "\ +The PXE Service is going to run on $INTERFACE with these values \ +(the defaults should be OK). \n\ +You can change the range of IP addresses used by the DHCP server, if \ +IP addresses in the proposed range are used by computers in your LAN. \ +For instance, your default gateway if you have one. \n\ +\n\ +Also note that we will not validate any changes you make:" \ + 18 68 0 \ + "IP Address:" 1 1 "$LOCAL_IPADDR" 1 30 0 0 \ + "Netmask:" 2 1 "$LOCAL_NETMASK" 2 30 0 0 \ + "Gateway:" 3 1 "$LOCAL_GATEWAY" 3 30 0 0 \ + "Lowest DHCP Client Address:" 4 1 "$MINLEASE_IP" 4 30 15 0 \ + "Highest DHCP Client Address:" 5 1 "$MAXLEASE_IP" 5 30 15 0 \ + ) > $TMP/tempopts + + if [ $? = 0 ]; then + # Remember... busybox ash is no good with arrays :/ + local i=0 + rm -f $TMP/tempkeys + cat $TMP/tempopts | while read VALUE ; do + if [ $i = 0 ]; then echo "MINLEASE_IP=\"$VALUE\"" >> $TMP/tempkeys + elif [ $i = 1 ]; then echo "MAXLEASE_IP=\"$VALUE\"" >> $TMP/tempkeys + fi + i=$(expr $i + 1) + done + eval $(cat $TMP/tempkeys) + rm $TMP/tempopts + break + fi + done + else + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --backtitle "@CDISTRO@ Linux Live PXE Server." \ + --title "DHCP SERVER CONFIGURATION" --msgbox "\ +\n\ +PXE server has been configured to use a DHCP server in your network.\n\ +\n\ +Press ENTER to continue." 14 68 + fi # [ "$OWNDHCP" = "yes" ] + + echo "DHCP=${OWNDHCP}" >> $TMP/SeTpxe + echo "GLOBAL_GATEWAY=${GLOBAL_GATEWAY}" >> $TMP/SeTpxe + echo "GLOBAL_GW_INT=${GLOBAL_GW_INT}" >> $TMP/SeTpxe + echo "LOCAL_IPADDR=${LOCAL_IPADDR}" >> $TMP/SeTpxe + echo "LOCAL_NETMASK=${LOCAL_NETMASK}" >> $TMP/SeTpxe + echo "LOCAL_GATEWAY=${LOCAL_GATEWAY}" >> $TMP/SeTpxe + echo "LOCAL_BROADCAST=${LOCAL_BROADCAST}" >> $TMP/SeTpxe + echo "LOCAL_NETWORK=${LOCAL_NETWORK}" >> $TMP/SeTpxe + echo "MINLEASE_IP=${MINLEASE_IP}" >> $TMP/SeTpxe + echo "MAXLEASE_IP=${MAXLEASE_IP}" >> $TMP/SeTpxe + + # Write out a suitable dnsmasq configuration: + cat <<EOF > ${TMP}/pxe_dnsmasq.conf +# Only listen at our designated interface: +listen-address=$LOCAL_IPADDR + +# Write the pid file: +pid-file=${TMP}/pxe_dnsmasq.pid + +# Start a TFTP server: +enable-tftp + +# Set the root directory for files available via FTP: +tftp-root=/var/lib/tftpboot + +# The boot filename: +dhcp-boot=/pxelinux.0 + +# Disable re-use of the DHCP servername and filename fields as extra +# option space. That's to avoid confusing some old or broken DHCP clients. +dhcp-no-override + +# Log connections so that we can display them on the console: +log-facility=/var/log/pxe_dnsmasq.log +log-dhcp + +# Custom path for the leases file: +dhcp-leasefile=$TMP/pxe_dnsmasq.leases + +# Craft a nice PXE menu: +pxe-prompt="Press F8 for boot menu", 3 + +# The known types are x86PC, PC98, IA64_EFI, Alpha, Arc_x86, +# Intel_Lean_Client, IA32_EFI, BC_EFI, Xscale_EFI and X86-64_EFI +pxe-service=X86PC, "Boot from network", /var/lib/tftpboot/pxelinux + +# A boot service type of 0 is special, and will abort the +# net boot procedure and continue booting from local media. +pxe-service=X86PC, "Boot from local hard disk", 0 + +EOF + + if [ -n "$LOCAL_GATEWAY" -a "$INTERFACE" = "$GLOBAL_GW_INT" ]; then + # The default gw can be reached through our $INTERFACE. + cat <<EOF >> ${TMP}/pxe_dnsmasq.conf +# Override the default route supplied by dnsmasq, which assumes the +# router is the same machine as the one running dnsmasq. +#dhcp-option=option:router,${LOCAL_GATEWAY} +dhcp-option=3,${LOCAL_GATEWAY} + +EOF + else + # The default gw is reached through a second interface on the computer. + # We need to build a router, a bridge or a NAT firewall between the two. + cat <<EOF >> ${TMP}/pxe_dnsmasq.conf +# Apply the default route supplied by dnsmasq, which assumes the +# router is the same machine as the one running dnsmasq. +# And we want to let our PXE clients use $INTERFACE as the default gw. +#dhcp-option=option:router,${LOCAL_IPADDR} + +EOF + fi + + if [ "$OWNDHCP" = "yes" ]; then + cat <<EOF >> ${TMP}/pxe_dnsmasq.conf +# dnsmasq functions as a normal DHCP server, providing IP leases. +dhcp-range=${MINLEASE_IP},${MAXLEASE_IP},${LOCAL_NETMASK},1h + +EOF + else + cat <<EOF >> ${TMP}/pxe_dnsmasq.conf +# There is an existing DHCP server on this LAN, so dnsmasq functions +# as a proxy DHCP server providing boot information but no IP leases. +# Any ip in the subnet will do, so you may just put your server NIC ip here. +dhcp-range=${LOCAL_IPADDR},proxy + +EOF + fi + + # Create the pxelinux configuration file: + KBD=$(sed -n "s%^ */usr/bin/loadkeys *%%p" /etc/rc.d/rc.keymap 2>/dev/null) + cat <<EOF > /var/lib/tftpboot/pxelinux.cfg/default +default pxelive +prompt 1 +timeout 300 +display message.txt +F1 message.txt +F2 f2.txt +F3 f3.txt +F4 f4.txt +label pxelive + kernel /generic + append initrd=/initrd.img load_ramdisk=1 prompt_ramdisk=0 rw printk.time=0 nfsroot=${LOCAL_IPADDR}:/mnt/livemedia luksvol= nop hostname=@DISTRO@ tz=$(cat /etc/timezone) locale=${SYSLANG:-"en_US.UTF-8"} kbd=${KBD:-"us"} +EOF + +} # end of pxeconfig() + +# -------------------------------------------------------- # +# Above was just initialization and function definitions. # +# Let's make use of all that. # +# ---------------------------------------------------------# + +# Main loop: +while [ 0 ]; do + + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "@CDISTRO@ Linux Live PXE Server (version current)" \ + --menu \ +"Welcome to @CDISTRO@ Linux Live PXE Server.\n\ +Select an option below using the UP/DOWN keys and SPACE or ENTER.\n\ +Alternate keys may also be used: '+', '-', and TAB." 13 72 9 \ +"NETWORK" "Configure your network parameters" \ +"ACTIVATE" "Activate the @CDISTRO@ PXE Server" \ +"EXIT" "Exit @CDISTRO@ PXE Setup" 2> $TMP/hdset + if [ ! $? = 0 ]; then + rm -f $TMP/hdset $TMP/SeT* + exit + fi + MAINSELECT="`cat $TMP/hdset`" + rm $TMP/hdset + + # Start checking what to do. Some modules may reset MAINSELECT to run the + # next item in line. + + if [ "$MAINSELECT" = "NETWORK" ]; then + # Set up our network. We may not know anything yet in which case + # the variable $INTERFACE will be empty. + pxeconfig $INTERFACE + if [ -r $TMP/SeTpxe ]; then + MAINSELECT="ACTIVATE" + fi + fi + + if [ "$MAINSELECT" = "ACTIVATE" ]; then + if [ ! -r $TMP/SeTpxe ]; then + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "CANNOT START PXE SERVER YET" --msgbox "\ +\n\ +Before you can start the PXE Server, complete the following task:\n\ +\n\ +(*) Set up your computer's network parameters.\n\ +\n\ +Press ENTER to return to the main menu." 14 68 + continue + else + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --title "READY TO START PXE SERVER" --msgbox "\ +\n\ +Ready to start the PXE Server!\n\ +The PXE server log will be displayed in the next screen. +\n\ +Press ENTER to start." 14 68 + fi + + # Time to start the BOOTP/TFTP/NFS servers: + echo > /var/log/pxe_dnsmasq.log + dnsmasq -C ${TMP}/pxe_dnsmasq.conf -z -i ${INTERFACE} + if ! grep -q "^/mnt/livemedia" /etc/exports ; then + cat <<EOT >> /etc/exports +/mnt/livemedia ${LOCAL_NETWORK}/${LOCAL_NETMASK}(ro,sync,insecure,no_subtree_check,root_squash) +EOT + fi + sh /etc/rc.d/rc.nfsd restart + if [ "$INTERFACE" != "$GLOBAL_GW_INT" ]; then + # The default gateway for this computer is on another interface; + # we need to enable forwarding: + OLDROUTING=$(cat /proc/sys/net/ipv4/ip_forward) + echo 1 > /proc/sys/net/ipv4/ip_forward + # also start the route daemon: + if [ -z "$(pidof routed)" ]; then + /usr/sbin/routed -g -s + fi + else + OLDROUTING="" + fi + + if [ $DEBUG -ne 0 ]; then read -p "Press ENTER to continue: " JUNK ; fi + $DIALOG --backtitle "Slackware PXE Server." \ + --title "PXE Client activity log" \ + --ok-label "EXIT" \ + --tailbox /var/log/pxe_dnsmasq.log 20 68 + + # Time to kill the BOOTP/TFTP/NFS servers: + [ -n "$OLDROUTING" ] && echo $OLDROUTING > /proc/sys/net/ipv4/ip_forward + kill -TERM $(cat ${TMP}/pxe_dnsmasq.pid) + sh /etc/rc.d/rc.nfsd stop + sed -i -e "s%^/mnt/livemedia.*%#&%" /etc/exports + fi + + if [ "$MAINSELECT" = "EXIT" ]; then + clear + break + fi + +done # end of main loop + +# end @CDISTRO@ Linux Live PXE Server script + |