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#!/bin/sh -e
. ../common.sh
gwiptbl=/tmp/p2ptbl/gwip
NodeId="$(cat /etc/nodeid)"
## setup gateway IPv4
# determine gw IP from p2ptable
getoct () {
p2ptbl show $gwiptbl \
| cut -f1,2 \
| egrep "[0-9]*"$'\t'"$1" \
| $2 \
| head -n1 \
| cut -f1
}
# get the lowest free addr
oct3=$(getoct free "sort -n")
# no free addrs? -> steal an addr from a random ghost
if [ -z "$oct3" ]; then
oct3=$(getoct ghost "shuf")
# no ghost addrs? -> steal an addr from a random queen
if [ -z "$oct3" ]; then
oct3=$(getoct queen "shuf")
fi
# TODO: log warning about IPv4 addr space exhaustion
fi
[ -n "$oct3" ]
net_mesh=$(uci get cloud.cur.net_mesh)
gwip=$( ipcalc.sh $net_mesh $(($oct3 * 256 + 1)) 1 | grep ^START | cut -f2 -d=)
dhcp_start=$(ipcalc.sh $net_mesh $(($oct3 * 256 + 2)) 1 | grep ^START | cut -f2 -d=)
dhcp_end=$( ipcalc.sh $net_mesh $(($oct3 * 256 + 254)) 1 | grep ^START | cut -f2 -d=)
p2ptbl update $gwiptbl $oct3 "queen\t$NodeId" br-mesh
# activate gw mode
batctl gw server
# set up gw IP
mesh_add_ipv4 $gwip 255.255.0.0
## setup DHCP
echo "
set dhcp.mesh=dhcp
set dhcp.mesh.start=2
set dhcp.mesh.limit=254
set dhcp.mesh.leasetime=$DHCPLeaseTime
set dhcp.mesh.interface=mesh
set dhcp.mesh.start_ip=$dhcp_start
set dhcp.mesh.end_ip=$dhcp_end
" | uci batch
/etc/init.d/dnsmasq restart
## set splash
# start redirection httpd (for splash), add GW IP to the addrs service
# httpd listens on
echo "http://$gwip/cgi-bin/splash.html? /usr/sbin/urlencode" > /tmp/redirection_target
enable_httpd redirection $gwip:81
change_service_httpd_listen $gwip:80
/etc/init.d/uhttpd restart
# fill splash table
splash_sync "$1"
# redirect tcp to local httpd, dns to local ns
iptables -t nat -F prerouting_inet_unsplashed
iptables -t nat -A prerouting_inet_unsplashed -p tcp -j DNAT --to $gwip:81
iptables -t nat -A prerouting_inet_unsplashed -p udp --dport 53 -j DNAT --to $gwip:53
# TODO: discard any other UDP traffic
## start N2N
/etc/init.d/n2n start
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