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+#!/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
+