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#!/bin/bash
#
# Wifi Hotspot app for YunoHost
# Copyright (C) 2015 Julien Vaubourg <julien@vaubourg.com>
# Contribute at https://github.com/labriqueinternet/hotspot_ynh
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Functions
## State functions
has_vpnclient_app() {
[ -e /tmp/.ynh-vpnclient-started ]
}
has_ip6delegatedprefix() {
i=${1}
[ "${ynh_ip6_net[${i}]}" != none ]
}
is_nat_set() {
internet_device=${1}
iptables -w -nvt nat -L POSTROUTING | grep MASQUERADE | grep -q "${internet_device}"
}
is_ip4nataddr_set() {
i=${1}
dev=$(devfromid "${i}")
ip address show dev "${dev}" 2> /dev/null | grep -q "${ynh_ip4_nat_prefix[${i}]}.1/24"
}
is_ip6addr_set() {
i=${1}
dev=$(devfromid "${i}")
ip address show dev "${dev}" 2> /dev/null | grep -q "${ynh_ip6_addr[${i}]}/64"
}
is_ip6firewall_set() {
i=${1}
dev=$(devfromid "${i}")
ip6tables -w -nvL FORWARD | grep DROP | grep -q "${dev}"
}
is_forwarding_set() {
ip6=$(sysctl net.ipv6.conf.all.forwarding | awk '{ print $NF; }')
ip4=$(sysctl net.ipv4.conf.all.forwarding | awk '{ print $NF; }')
[ "${ip6}" -eq 1 -a "${ip4}" -eq 1 ]
}
is_dhcpd6_running() {
i=${1}
$(ps aux | grep "dhcpdv6-ssid${i}" | grep -qv grep)
}
is_dhcpd4_running() {
i=${1}
$(ps aux | grep "dhcpdv4-ssid${i}" | grep -qv grep)
}
is_hostapd_running() {
systemctl is-active hostapd &> /dev/null
}
is_running() {
for i in $(seq 0 $((${ynh_multissid} - 1))); do
( has_ip6delegatedprefix ${i} && is_ip6addr_set ${i}\
&& ( [ "${ynh_ip6_firewall[${i}]}" -eq 1 ] && is_ip6firewall_set ${i} || [ "${ynh_ip6_firewall[${i}]}" -eq 0 ] )\
&& is_dhcpd6_running ${i} || ! has_ip6delegatedprefix ${i} )\
&& is_ip4nataddr_set ${i} && is_dhcpd4_running ${i}
if [ ! $? -eq 0 ]; then
return 1
fi
done
is_hostapd_running && is_forwarding_set && ( [ -z "${new_internet_device}" ] || is_nat_set "${new_internet_device}" )
}
## Setters
set_nat() {
internet_device=${1}
iptables -w -t nat -A POSTROUTING -o "${internet_device}" -j MASQUERADE
}
set_ip4nataddr() {
i=${1}
dev=$(devfromid "${i}")
ip address add "${ynh_ip4_nat_prefix[${i}]}.1/24" dev "${dev}"
}
set_ip6addr() {
i=${1}
dev=$(devfromid "${i}")
ip address delete "${ynh_ip6_addr[${i}]}/64" dev tun0 &> /dev/null
ip address add "${ynh_ip6_addr[${i}]}/64" dev "${dev}"
}
set_ip6firewall() {
i=${1}
dev=$(devfromid "${i}")
ip6tables -w -A FORWARD -i "${dev}" -j ACCEPT
ip6tables -w -A FORWARD -o "${dev}" -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
ip6tables -w -A FORWARD -o "${dev}" -j DROP
}
set_forwarding() {
sysctl -w net.ipv6.conf.all.forwarding=1 > /dev/null
sysctl -w net.ipv4.conf.all.forwarding=1 > /dev/null
}
start_dhcpd6() {
i=${1}
dev=$(devfromid "${i}")
cp /etc/dnsmasq.dhcpd/dhcpdv6{.conf.tpl,-ssid${i}.conf}
sed "s|<TPL:WIFI_DEVICE>|${dev}|g" -i /etc/dnsmasq.dhcpd/dhcpdv6-ssid${i}.conf
sed "s|<TPL:IP6_NET>|${ynh_ip6_net[${i}]}|g" -i /etc/dnsmasq.dhcpd/dhcpdv6-ssid${i}.conf
sed "s|<TPL:IP6_DNS0>|${ynh_ip6_dns0[${i}]}|g" -i /etc/dnsmasq.dhcpd/dhcpdv6-ssid${i}.conf
sed "s|<TPL:IP6_DNS1>|${ynh_ip6_dns1[${i}]}|g" -i /etc/dnsmasq.dhcpd/dhcpdv6-ssid${i}.conf
dnsmasq -C /etc/dnsmasq.dhcpd/dhcpdv6-ssid${i}.conf -p0
}
start_dhcpd4() {
i=${1}
dev=$(devfromid "${i}")
cp /etc/dnsmasq.dhcpd/dhcpdv4{.conf.tpl,-ssid${i}.conf}
sed "s|<TPL:IP4_DNS0>|${ynh_ip4_dns0[${i}]}|g" -i /etc/dnsmasq.dhcpd/dhcpdv4-ssid${i}.conf
sed "s|<TPL:IP4_DNS1>|${ynh_ip4_dns1[${i}]}|g" -i /etc/dnsmasq.dhcpd/dhcpdv4-ssid${i}.conf
sed "s|<TPL:WIFI_DEVICE>|${dev}|g" -i /etc/dnsmasq.dhcpd/dhcpdv4-ssid${i}.conf
sed "s|<TPL:IP4_NAT_PREFIX>|${ynh_ip4_nat_prefix[${i}]}|g" -i /etc/dnsmasq.dhcpd/dhcpdv4-ssid${i}.conf
dnsmasq -C /etc/dnsmasq.dhcpd/dhcpdv4-ssid${i}.conf -p0
}
start_hostapd() {
cp /etc/hostapd/hostapd.conf{.tpl1,}
ethaddr=$(ip link show dev "${ynh_wifi_device}" | grep link/ether | awk -F: '{ printf "02:%s:%s:%s:%s:00", $2, $3, $4, $5 }')
ip link set addr "${ethaddr}" dev "${ynh_wifi_device}"
sed "s|<TPL:WIFI_DEVICE>|${ynh_wifi_device}|g" -i /etc/hostapd/hostapd.conf
sed "s|<TPL:WIFI_CHANNEL>|${ynh_wifi_channel}|g" -i /etc/hostapd/hostapd.conf
sed "s|<TPL:N_COMMENT>||g" -i /etc/hostapd/hostapd.conf
for i in $(seq 0 $((${ynh_multissid} - 1))); do
cp /etc/hostapd/hostapd.conf{.tpl2,.tmp}
sed "s|<TPL:WIFI_INTERFACE>|hotspot${i}|g" -i /etc/hostapd/hostapd.conf.tmp
sed "s|<TPL:WIFI_SSID>|${ynh_wifi_ssid[${i}]}|g" -i /etc/hostapd/hostapd.conf.tmp
sed "s|<TPL:WIFI_PASSPHRASE>|${ynh_wifi_passphrase[${i}]}|g" -i /etc/hostapd/hostapd.conf.tmp
if [ "${ynh_wifi_secure[${i}]}" -eq 1 ]; then
sed "s|<TPL:SEC_COMMENT>||g" -i /etc/hostapd/hostapd.conf.tmp
else
sed "s|<TPL:SEC_COMMENT>|#|g" -i /etc/hostapd/hostapd.conf.tmp
fi
if [ "${i}" -eq 0 ]; then
sed "s|<TPL:BSS_COMMENT>|#|g" -i /etc/hostapd/hostapd.conf.tmp
else
sed "s|<TPL:BSS_COMMENT>||g" -i /etc/hostapd/hostapd.conf.tmp
fi
cat /etc/hostapd/hostapd.conf.tmp >> /etc/hostapd/hostapd.conf
rm /etc/hostapd/hostapd.conf.tmp
done
systemctl start hostapd
}
## Unsetters
unset_nat() {
internet_device=${1}
iptables -w -t nat -D POSTROUTING -o "${internet_device}" -j MASQUERADE
}
unset_ip4nataddr() {
i=${1}
dev=$(devfromid "${i}")
ip address delete "${ynh_ip4_nat_prefix[${i}]}.1/24" dev "${dev}"
}
unset_ip6addr() {
i=${1}
dev=$(devfromid "${i}")
ip address delete "${ynh_ip6_addr[${i}]}/64" dev "${dev}"
}
unset_ip6firewall() {
i=${1}
dev=$(devfromid "${i}")
ip6tables -w -D FORWARD -i "${dev}" -j ACCEPT
ip6tables -w -D FORWARD -o "${dev}" -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
ip6tables -w -D FORWARD -o "${dev}" -j DROP
}
unset_forwarding() {
sysctl -w net.ipv6.conf.all.forwarding=0 > /dev/null
sysctl -w net.ipv4.conf.all.forwarding=0 > /dev/null
}
stop_dhcpd6() {
kill $(ps aux | grep 'dhcpdv6-ssid' | grep -v grep | awk '{ print $2 }')
rm -f /etc/dnsmasq.d/dhcpdv6-ssid*.conf
}
stop_dhcpd4() {
kill $(ps aux | grep 'dhcpdv4-ssid' | grep -v grep | awk '{ print $2 }')
rm -f /etc/dnsmasq.d/dhcpdv4-ssid*.conf
}
stop_hostapd() {
systemctl stop hostapd
}
## Tools
ynh_setting_get() {
app=${1}
setting=${2}
grep "^${setting}:" "/etc/yunohost/apps/${app}/settings.yml" | sed s/^[^:]\\+:\\s*[\"\']\\?// | sed s/\\s*[\"\']\$//
}
ynh_setting_set() {
app=${1}
setting=${2}
value=${3}
yunohost app setting "${app}" "${setting}" -v "${value}"
}
devfromid() {
i=${1}
if [ "${i}" -eq 0 ]; then
echo "${ynh_wifi_device}"
else
echo "hotspot${i}"
fi
}
if [ "$1" != restart ]; then
# Restart php7.0-fpm at the first start (it needs to be restarted after the slapd start)
if [ ! -e /tmp/.ynh-hotspot-boot ]; then
touch /tmp/.ynh-hotspot-boot
systemctl restart php7.0-fpm
fi
# Variables
echo -n "Retrieving Yunohost settings... "
ynh_service_enabled=$(systemctl is-enabled ynh-hotspot)
ynh_wifi_device=$(ynh_setting_get hotspot wifi_device)
ynh_wifi_channel=$(ynh_setting_get hotspot wifi_channel)
ynh_multissid=$(ynh_setting_get hotspot multissid)
IFS='|' read -a ynh_wifi_ssid <<< "$(ynh_setting_get hotspot wifi_ssid)"
IFS='|' read -a ynh_wifi_secure <<< "$(ynh_setting_get hotspot wifi_secure)"
IFS='|' read -a ynh_wifi_passphrase <<< "$(ynh_setting_get hotspot wifi_passphrase)"
IFS='|' read -a ynh_ip6_addr <<< "$(ynh_setting_get hotspot ip6_addr)"
IFS='|' read -a ynh_ip6_firewall <<< "$(ynh_setting_get hotspot ip6_firewall)"
IFS='|' read -a ynh_ip6_net <<< "$(ynh_setting_get hotspot ip6_net)"
IFS='|' read -a ynh_ip6_dns0 <<< "$(ynh_setting_get hotspot ip6_dns0)"
IFS='|' read -a ynh_ip6_dns1 <<< "$(ynh_setting_get hotspot ip6_dns1)"
IFS='|' read -a ynh_ip4_dns0 <<< "$(ynh_setting_get hotspot ip4_dns0)"
IFS='|' read -a ynh_ip4_dns1 <<< "$(ynh_setting_get hotspot ip4_dns1)"
IFS='|' read -a ynh_ip4_nat_prefix <<< "$(ynh_setting_get hotspot ip4_nat_prefix)"
old_internet_device=$(ynh_setting_get hotspot internet_device)
new_internet_device=$(ip route | awk '/default via/ { print $NF; }')
# Switch the NAT interface if there is a VPN
ip link show dev tun0 &> /dev/null
if [ "$?" -eq 0 ]; then
new_internet_device=tun0
fi
echo "OK"
fi
# Script
case "$1" in
start)
if is_running; then
echo "Already started"
elif [ "${ynh_service_enabled}" != "enabled" ]; then
echo "Disabled service"
else
echo "[hotspot] Starting..."
touch /tmp/.ynh-hotspot-started
if [ "${new_internet_device}" == tun0 ]; then
ynh_setting_set hotspot vpnclient yes
else
ynh_setting_set hotspot vpnclient no
fi
# Check old state of the ipv4 NAT settings
if [ ! -z "${old_internet_device}" -a "${new_internet_device}" != "${old_internet_device}" ]\
&& is_nat_set "${old_internet_device}"; then
unset_nat "${old_internet_device}"
fi
# Set ipv4 NAT
if [ ! -z "${new_internet_device}" ] && ! is_nat_set "${new_internet_device}"; then
echo "Set NAT"
set_nat "${new_internet_device}"
fi
# Set forwarding for ipv6 and ipv4
if ! is_forwarding_set; then
echo "Set forwarding"
set_forwarding
fi
# Run hostapd
if ! is_hostapd_running; then
echo "Run hostapd"
start_hostapd ${i}
if [ ! $? -eq 0 ]; then
exit 1
fi
if [ "${ynh_multissid}" -gt 1 ]; then
i=0; false || while [ $? -ne 0 ]; do
sleep 1 && (( i++ ))
[ ${i} -gt 20 ] && stop_hostapd
[ ${i} -gt 20 ] && exit 1
ip link show dev hotspot1 &> /dev/null
done
else
sleep 1
fi
fi
# For each registred ssid
for i in $(seq 0 $((${ynh_multissid} - 1))); do
# Set ipv4 NAT address
if ! is_ip4nataddr_set ${i}; then
echo "hotspot${i}: Set IPv4 NAT address"
set_ip4nataddr ${i}
fi
# Set the ipv6 address
if has_ip6delegatedprefix ${i} && ! is_ip6addr_set ${i}; then
echo "hotspot${i}: Set IPv6 address"
set_ip6addr ${i}
fi
# Set ipv6 firewalling
if has_ip6delegatedprefix ${i} && [ "${ynh_ip6_firewall[${i}]}" -eq 1 ] && ! is_ip6firewall_set ${i}; then
echo "hotspot${i}: Set IPv6 firewalling"
set_ip6firewall ${i}
fi
# Run DHCPv6 server
if has_ip6delegatedprefix ${i} && ! is_dhcpd6_running ${i}; then
echo "hotspot${i}: Start the NDP and DHCPv6 server (dnsmasq)"
start_dhcpd6 ${i}
fi
# Run DHCPv4 server
if ! is_dhcpd4_running ${i}; then
echo "hotspot${i}: Start the DHCPv4 server (dnsmasq)"
start_dhcpd4 ${i}
fi
done
# Update dynamic settings
ynh_setting_set hotspot internet_device "${new_internet_device}"
fi
;;
stop)
echo "[hotspot] Stopping..."
rm -f /tmp/.ynh-hotspot-started
if [ ! -z "${old_internet_device}" ] && is_nat_set "${old_internet_device}"; then
echo "Unset NAT"
unset_nat "${old_internet_device}"
fi
if is_forwarding_set; then
echo "Unset forwarding"
unset_forwarding
fi
for i in $(seq 0 $((${ynh_multissid} - 1))); do
if is_ip4nataddr_set ${i}; then
echo "hotspot${i}: Unset IPv4 NAT address"
unset_ip4nataddr ${i}
fi
if has_ip6delegatedprefix ${i} && is_ip6addr_set ${i}; then
echo "hotspot${i}: Unset IPv6 address"
unset_ip6addr ${i}
fi
if has_ip6delegatedprefix ${i} && [ "${ynh_ip6_firewall[${i}]}" -eq 1 ] && is_ip6firewall_set ${i}; then
echo "hotspot${i}: Unset IPv6 firewalling"
unset_ip6firewall ${i}
fi
if is_dhcpd6_running ${i}; then
echo "hotspot${i}: Stop the NDP and DHCPv6 server (dnsmasq)"
stop_dhcpd6 ${i}
fi
if is_dhcpd4_running ${i}; then
echo "hotspot${i}: Stop the DHCPv4 server (dnsmasq)"
stop_dhcpd4 ${i}
fi
done
if is_hostapd_running; then
echo "Stop hostapd"
stop_hostapd
fi
# Fix configuration
if has_vpnclient_app; then
ynh-vpnclient start
fi
;;
restart)
$0 stop
$0 start
;;
status)
exitcode=0
if [ "${ynh_service_enabled}" != "enabled" ]; then
echo "[ERR] Hotspot Service disabled"
exitcode=1
fi
echo "[INFO] Autodetected internet interface: ${new_internet_device} (last start: ${old_internet_device})"
if is_nat_set "${new_internet_device}"; then
echo "[OK] IPv4 NAT set"
else
if [ -z "${new_internet_device}" ]; then
echo "[INFO] No IPv4 NAT set (no internet interface)"
else
echo "[ERR] No IPv4 NAT set"
fi
exitcode=1
fi
if is_forwarding_set; then
echo "[OK] IPv6/IPv4 forwarding set"
else
echo "[ERR] No IPv6/IPv4 forwarding set"
exitcode=1
fi
if is_hostapd_running; then
echo "[OK] Hostapd is running"
else
echo "[ERR] Hostapd is not running"
exitcode=1
fi
for i in $(seq 0 $((${ynh_multissid} - 1))); do
if has_ip6delegatedprefix ${i}; then
echo "[INFO] hotspot${i}: IPv6 delegated prefix found"
echo "[INFO] hotspot${i}: IPv6 address computed from the delegated prefix: ${ynh_ip6_addr}"
if is_ip6addr_set ${i}; then
echo "[OK] hotspot${i}: IPv6 address set"
else
echo "[ERR] hotspot${i}: No IPv6 address set"
exitcode=1
fi
if is_ip6firewall_set ${i}; then
echo "[OK] hotspot${i}: IPv6 firewalling set"
else
if [ "${ynh_ip6_firewall[${i}]}" -eq 1 ]; then
echo "[ERR] hotspot${i}: No IPv6 firewalling set"
else
echo "[INFO] hotspot${i}: No IPv6 firewalling set"
fi
exitcode=1
fi
if is_dhcpd6_running ${i}; then
echo "[OK] hotspot${i}: NDP and DHCPv6 server (dnsmasq) are running"
else
echo "[ERR] hotspot${i}: NDP and DHCPv6 server (dnsmasq) are not running"
exitcode=1
fi
else
echo "[INFO] hotspot${i}: No IPv6 delegated prefix found"
fi
if is_dhcpd4_running ${i}; then
echo "[OK] hotspot${i}: DHCPv4 server (dnsmasq) is running"
else
echo "[ERR] hotspot${i}: DHCPv4 (dnsmasq) is not running"
exitcode=1
fi
if is_ip4nataddr_set ${i}; then
echo "[OK] hotspot${i}: IPv4 NAT address set"
else
echo "[ERR] hotspot${i}: No IPv4 NAT address set"
exitcode=1
fi
done
exit ${exitcode}
;;
*)
echo "Usage: $0 {start|stop|restart|status}"
exit 1
;;
esac
exit 0