#!/usr/bin/env bash

set -x

set -e

# CustomPiOS auto-hotspot module

# Script sets up an automatic hotspot if no wifi is found

# Based on http://www.raspberryconnect.com/network/item/330-raspberry-pi-auto-wifi-hotspot-switch-internet

# Written by Guy Sheffer <guysoft at gmail dot com>

# GPL V3

########

source /common.sh

apt-get update --allow-releaseinfo-change

apt-get -y purge dns-root-data

apt-get -y install iw

apt-get purge dns-root-data

apt-get install -y hostapd dnsmasq iptables

systemctl disable hostapd

systemctl disable dnsmasq

# Unpack after hostapd dnsmasq so we can overwrite their config if needed

unpack /filesystem/root /

# Set hotspot name and password

sed -i s"/AUTO_HOTSPOT_NAME/$AUTO_HOTSPOT_NAME/g" /etc/hostapd/hostapd.conf

sed -i s"/AUTO_HOTSPOT_PASSWORD/$AUTO_HOTSPOT_PASSWORD/g" /etc/hostapd/hostapd.conf

sed -i s"/AUTO_HOTSPOT_CHANNEL/$AUTO_HOTSPOT_CHANNEL/g" /etc/hostapd/hostapd.conf

if grep -Fxq "DAEMON_CONF" /etc/default/hostapd

then

sed -i "s@#DAEMON_CONF=\"\"@DAEMON_CONF=\"/etc/hostapd/hostapd.conf\"@g" /etc/default/hostapd

else

echo DAEMON_CONF=\"/etc/hostapd/hostapd.conf\" >> /etc/default/hostapd

fi

sed -i "s@^DAEMON_OPTS=\"\"@^#DAEMON_OPTS=\"\"@g" /etc/default/hostapd

echo "

# IPv6

duid

interface eth0

ipv6rs

iaid 1

ia_pd 2 wlan0/1/64 # request prefixes for VLANs

" >> /etc/dhcpcd.conf

sed -i 's/clientid/# clientid/g' /etc/dhcpcd.conf

echo "

# Auto-hotspot Config

# Interface to use

interface=wlan0

bind-interfaces

dhcp-range=192.168.50.150,192.168.50.200,255.255.255.0,12h

# IPv6

except-interface=eth0

enable-ra

dhcp-range=tag:wlan0,::1,constructor:wlan0, ra-names, 12h

" >> /etc/dnsmasq.conf

sed -i 's/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/g' /etc/sysctl.conf

cp /etc/network/interfaces /etc/network/interfaces-backup

echo "" > /etc/network/interfaces

# Add cronjob

echo "* * * * * /usr/bin/autohotspotN" | crontab -

systemctl enable autohotspot.service