Following instructions from: http://code.google.com/p/quickanddirty/wiki/CreatingWirelessHotspotWithLinux

hotspot.sh

#!/bin/bash
# HotSpot creating script using hostapd, dnsmasq and iptables
# Following instructions from: http://code.google.com/p/quickanddirty/wiki/CreatingWirelessHotspotWithLinux

LAN=wlan2
WAN=eth2

startap(){
	# Start
	# Enable routing
	sysctl net.ipv4.ip_forward=1
	# Cleaning NAT
	iptables -F
	iptables -t nat -F
	iptables -t mangle -F
	iptables -X
	iptables -t nat -X
	iptables -t mangle -X

	# Configure IP address for WLAN
	ifconfig $LAN down
	ifconfig $LAN 192.168.0.1

	iptables -A FORWARD -o $WAN -i $LAN -m conntrack --ctstate NEW -j ACCEPT
	iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
	iptables -A POSTROUTING -t nat -j MASQUERADE

	# Start DNSMasq
	service dnsmasq restart
	# Run access point daemon
	hostapd /etc/hostapd.conf >> /var/log/hostapd 2>&1 &
}
stopap(){
	# Stop
	# Disable NAT
	iptables -F
	iptables -t nat -F
	iptables -t mangle -F
	iptables -X
	iptables -t nat -X
	iptables -t mangle -X
	ifconfig $LAN down
	# Disable routing
	#sysctl net.ipv4.ip_forward=0
	# Disable DHCP/DNS server
	service dnsmasq stop
	#Stop hostapd daemon
	PID=`pidof hostapd || echo "not running"`
	printf "Stopping hostapd..."
	if [[ "$PID" != "not running" ]]; then
		kill -9 $PID
		printf "done\n"
	else
		printf "$PID\n"
	fi
}

case $1 in
	start)
		startap
		;;
	stop)
		stopap
		;;
	*)
		echo "Usage: `basename ${0}` start|stop"
		;;
esac

http://linux-sunxi.org/Mele_A1000#Mele_A1000G.2FA2000G.2FA100G