#!/bin/sh BRNUM=0 CNET="10.$BRNUM.0" IFACE_LIST=/tmp/interfaces get_interfaces() { [ -f "$IFACE_LIST" ] || tail -n +3 /proc/net/dev \ | awk -F: '$1 !~ /lo/ { print $1 }' > "$IFACE_LIST" cat "$IFACE_LIST" } make_dhcp_subnet() { local num=$1 local iface=$2 local network="$CNET.$num" local netmask=255.255.255.240 local router="$CNET.$(( $num + 1 ))" local poolstart="$CNET.$(( $num + 2 ))" local poolend="$CNET.$(( $num + 14 ))" echo "subnet $network netmask $netmask {" echo " range $poolstart $poolend;" echo " option routers $router;" echo "}" echo "" ip addr add $router/28 dev $iface || echo "Failed to set address $router/28 on $iface" >&2 ip link set dev $iface up iptables -t nat -A PREROUTING -i $iface -j DNAT --to-destination $router } make_dhcp_global() { echo "option domain-name \"bootstrap.invalid\";" echo "option domain-name-servers $CNET.1;" echo "ddns-update-style none;" echo "" } # parse args while getopts "b:" opts; do case "$opts" in b) BRNUM="$OPTARG";; h) usage;; esac done shift $(( $OPTIND - 1 )) hostname alpine # install needed packages apk_add dhcp iptables tinydns acf-apk "$@" # config dhcp server make_dhcp_global > /etc/dhcp/dhcpd.conf count=0 for i in $(get_interfaces); do # maximum 16 network interfaces [ $count -ge 16 ] && break make_dhcp_subnet $(( $count * 16 )) $i >> /etc/dhcp/dhcpd.conf count=$(( $count + 1 )) done /etc/init.d/syslog start /etc/init.d/dhcpd start FORCE_SETUP_WEBCONF=yes setup-webconf apk "$@" # set up http listener/forwarder mkdir -p /var/www/redirect cat </var/www/redirect/index.html EOF httpd -h /var/www/redirect # dummy dns echo "* $CNET.1" > /etc/dnsd.conf /etc/init.d/dnsd start exit 0