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entrypoint.sh
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entrypoint.sh
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#!/usr/bin/env sh
set -o errexit
set -o nounset
set -o pipefail
set -o xtrace
# Require environment variables.
if [ -z "${SUBSPACE_HTTP_HOST-}" ]; then
echo "Environment variable SUBSPACE_HTTP_HOST required. Exiting."
exit 1
fi
# Optional environment variables.
if [ -z "${SUBSPACE_BACKLINK-}" ]; then
export SUBSPACE_BACKLINK="/"
fi
if [ -z "${SUBSPACE_IPV4_POOL-}" ]; then
export SUBSPACE_IPV4_POOL="10.99.80.0/20"
fi
if [ -z "${SUBSPACE_IPV6_POOL-}" ]; then
export SUBSPACE_IPV6_POOL="fd00::10:97:0/64"
fi
if [ -z "${SUBSPACE_NAMESERVER_IPv4-}" ] ; then
export SUBSPACE_NAMESERVER_IPv4="1.1.1.1"
fi
if [ -z "${SUBSPACE_NAMESERVERS-}" ]; then
export SUBSPACE_NAMESERVERS="1.1.1.1,1.0.0.1"
fi
if [ -z "${SUBSPACE_NAMESERVER_IPv6-}" ] ; then
export SUBSPACE_NAMESERVER_IPv6="2606:4700:4700::1111"
fi
if [ -z "${SUBSPACE_LETSENCRYPT-}" ]; then
export SUBSPACE_LETSENCRYPT="true"
fi
if [ -z "${SUBSPACE_HTTP_ADDR-}" ]; then
export SUBSPACE_HTTP_ADDR=":80"
fi
if [ -z "${SUBSPACE_LISTENPORT-}" ]; then
export SUBSPACE_LISTENPORT="51820"
fi
if [ -z "${SUBSPACE_HTTP_INSECURE-}" ]; then
export SUBSPACE_HTTP_INSECURE="false"
fi
if [ -z "${SUBSPACE_THEME-}" ]; then
export SUBSPACE_THEME="green"
fi
export DEBIAN_FRONTEND="noninteractive"
if [ -z "${SUBSPACE_IPV4_GW-}" ]; then
export SUBSPACE_IPV4_PREF=$(echo ${SUBSPACE_IPV4_POOL-} | cut -d '/' -f1 | sed 's/.0$/./g')
export SUBSPACE_IPV4_GW=$(echo ${SUBSPACE_IPV4_PREF-}1)
fi
if [ -z "${SUBSPACE_IPV6_GW-}" ]; then
export SUBSPACE_IPV6_PREF=$(echo ${SUBSPACE_IPV6_POOL-} | cut -d '/' -f1 | sed 's/:0$/:/g')
export SUBSPACE_IPV6_GW=$(echo ${SUBSPACE_IPV6_PREF-}1)
fi
if [ -z "${SUBSPACE_IPV6_NAT_ENABLED-}" ] || [ "${SUBSPACE_IPV6_NAT_ENABLED}" != "0" ]; then
export SUBSPACE_IPV6_NAT_ENABLED=1
else
export SUBSPACE_IPV6_NAT_ENABLED=0
fi
if [ -z "${SUBSPACE_IPV4_NAT_ENABLED-}" ] || [ "${SUBSPACE_IPV4_NAT_ENABLED}" != "0" ]; then
export SUBSPACE_IPV4_NAT_ENABLED=1
else
export SUBSPACE_IPV4_NAT_ENABLED=0
fi
# DNS server is disabled if the flag is not ommited and set to anything other than 0.
if ! [ -z "${SUBSPACE_DISABLE_DNS-}" ] && [ "${SUBSPACE_DISABLE_DNS}" != "0" ]; then
export SUBSPACE_DISABLE_DNS=1
else
export SUBSPACE_DISABLE_DNS=0
fi
if [ -z "${SUBSPACE_DISABLE_MASQUERADE-}" ]; then
if [ "$SUBSPACE_IPV6_NAT_ENABLED" == "0" ] && [ "$SUBSPACE_IPV4_NAT_ENABLED" == "0" ]; then
echo "One of envionment variables SUBSPACE_IPV6_NAT_ENABLED, SUBSPACE_IPV4_NAT_ENABLED must be set to 1."
echo "Got SUBSPACE_IPV6_NAT_ENABLED=$SUBSPACE_IPV6_NAT_ENABLED, SUBSPACE_IPV4_NAT_ENABLED=$SUBSPACE_IPV4_NAT_ENABLED"
exit 1
fi
fi
# Empty out inherited nameservers
echo "" >/etc/resolv.conf
# Set DNS servers
echo ${SUBSPACE_NAMESERVERS} | tr "," "\n" | while read -r ns; do echo "nameserver ${ns}" >>/etc/resolv.conf; done
if [ -z "${SUBSPACE_DISABLE_MASQUERADE-}" ]; then
if [[ ${SUBSPACE_IPV4_NAT_ENABLED} -ne 0 ]]; then
# IPv4
if ! /sbin/iptables -t nat --check POSTROUTING -s ${SUBSPACE_IPV4_POOL} -j MASQUERADE; then
/sbin/iptables -t nat --append POSTROUTING -s ${SUBSPACE_IPV4_POOL} -j MASQUERADE
fi
if ! /sbin/iptables --check FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT; then
/sbin/iptables --append FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
fi
if ! /sbin/iptables --check FORWARD -s ${SUBSPACE_IPV4_POOL} -j ACCEPT; then
/sbin/iptables --append FORWARD -s ${SUBSPACE_IPV4_POOL} -j ACCEPT
fi
fi
if [[ ${SUBSPACE_IPV6_NAT_ENABLED} -ne 0 ]]; then
# IPv6
if ! /sbin/ip6tables -t nat --check POSTROUTING -s ${SUBSPACE_IPV6_POOL} -j MASQUERADE; then
/sbin/ip6tables -t nat --append POSTROUTING -s ${SUBSPACE_IPV6_POOL} -j MASQUERADE
fi
if ! /sbin/ip6tables --check FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT; then
/sbin/ip6tables --append FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
fi
if ! /sbin/ip6tables --check FORWARD -s ${SUBSPACE_IPV6_POOL} -j ACCEPT; then
/sbin/ip6tables --append FORWARD -s ${SUBSPACE_IPV6_POOL} -j ACCEPT
fi
fi
fi
if [[ ${SUBSPACE_IPV4_NAT_ENABLED} -ne 0 ]]; then
# ipv4 - DNS Leak Protection
if ! /sbin/iptables -t nat --check OUTPUT -s ${SUBSPACE_IPV4_POOL} -p udp --dport 53 -j DNAT --to ${SUBSPACE_IPV4_GW}:53; then
/sbin/iptables -t nat --append OUTPUT -s ${SUBSPACE_IPV4_POOL} -p udp --dport 53 -j DNAT --to ${SUBSPACE_IPV4_GW}:53
fi
if ! /sbin/iptables -t nat --check OUTPUT -s ${SUBSPACE_IPV4_POOL} -p tcp --dport 53 -j DNAT --to ${SUBSPACE_IPV4_GW}:53; then
/sbin/iptables -t nat --append OUTPUT -s ${SUBSPACE_IPV4_POOL} -p tcp --dport 53 -j DNAT --to ${SUBSPACE_IPV4_GW}:53
fi
fi
if [[ ${SUBSPACE_IPV6_NAT_ENABLED} -ne 0 ]]; then
# ipv6 - DNS Leak Protection
if ! /sbin/ip6tables --wait -t nat --check OUTPUT -s ${SUBSPACE_IPV6_POOL} -p udp --dport 53 -j DNAT --to ${SUBSPACE_IPV6_GW}; then
/sbin/ip6tables --wait -t nat --append OUTPUT -s ${SUBSPACE_IPV6_POOL} -p udp --dport 53 -j DNAT --to ${SUBSPACE_IPV6_GW}
fi
if ! /sbin/ip6tables --wait -t nat --check OUTPUT -s ${SUBSPACE_IPV6_POOL} -p tcp --dport 53 -j DNAT --to ${SUBSPACE_IPV6_GW}; then
/sbin/ip6tables --wait -t nat --append OUTPUT -s ${SUBSPACE_IPV6_POOL} -p tcp --dport 53 -j DNAT --to ${SUBSPACE_IPV6_GW}
fi
fi
#
# WireGuard (${SUBSPACE_IPV4_POOL})
#
umask_val=$(umask)
umask 0077
if ! test -d /data/wireguard; then
mkdir /data/wireguard
cd /data/wireguard
mkdir clients
touch clients/null.conf # So you can cat *.conf safely
mkdir peers
touch peers/null.conf # So you can cat *.conf safely
# Generate public/private server keys.
wg genkey | tee server.private | wg pubkey >server.public
fi
cat <<WGSERVER >/data/wireguard/server.conf
[Interface]
PrivateKey = $(cat /data/wireguard/server.private)
ListenPort = ${SUBSPACE_LISTENPORT}
WGSERVER
cat /data/wireguard/peers/*.conf >>/data/wireguard/server.conf
umask ${umask_val}
[ -f /data/config.json ] && chmod 600 /data/config.json # Special handling of file not created by start-up script
if ip link show wg0 2>/dev/null; then
ip link del wg0
fi
ip link add wg0 type wireguard
if [[ ${SUBSPACE_IPV4_NAT_ENABLED} -ne 0 ]]; then
export SUBSPACE_IPV4_CIDR=$(echo ${SUBSPACE_IPV4_POOL-} | cut -d '/' -f2)
ip addr add ${SUBSPACE_IPV4_GW}/${SUBSPACE_IPV4_CIDR} dev wg0
fi
if [[ ${SUBSPACE_IPV6_NAT_ENABLED} -ne 0 ]]; then
export SUBSPACE_IPV6_CIDR=$(echo ${SUBSPACE_IPV6_POOL-} | cut -d '/' -f2)
ip addr add ${SUBSPACE_IPV6_GW}/${SUBSPACE_IPV6_CIDR} dev wg0
fi
wg setconf wg0 /data/wireguard/server.conf
ip link set wg0 up
# dnsmasq service
if [[ ${SUBSPACE_DISABLE_DNS} == "0" ]]; then
DNSMASQ_LISTEN_ADDRESS="127.0.0.1"
if [[ ${SUBSPACE_IPV4_NAT_ENABLED} -ne 0 ]]; then
DNSMASQ_LISTEN_ADDRESS="${DNSMASQ_LISTEN_ADDRESS},${SUBSPACE_IPV4_GW}"
fi
if [[ ${SUBSPACE_IPV6_NAT_ENABLED} -ne 0 ]]; then
DNSMASQ_LISTEN_ADDRESS="${DNSMASQ_LISTEN_ADDRESS},${SUBSPACE_IPV6_GW}"
fi
if ! test -d /etc/service/dnsmasq; then
cat <<DNSMASQ >/etc/dnsmasq.conf
# Only listen on necessary addresses.
listen-address=${DNSMASQ_LISTEN_ADDRESS}
# Never forward plain names (without a dot or domain part)
domain-needed
# Never forward addresses in the non-routed address spaces.
bogus-priv
# Allow extending dnsmasq by providing custom configurations.
conf-dir=/etc/dnsmasq.d
DNSMASQ
mkdir -p /etc/service/dnsmasq
cat <<RUNIT >/etc/service/dnsmasq/run
#!/bin/sh
exec /usr/sbin/dnsmasq --no-daemon
RUNIT
chmod +x /etc/service/dnsmasq/run
# dnsmasq service log
mkdir -p /etc/service/dnsmasq/log/main
cat <<RUNIT >/etc/service/dnsmasq/log/run
#!/bin/sh
exec svlogd -tt ./main
RUNIT
chmod +x /etc/service/dnsmasq/log/run
fi
fi
# subspace service
if ! test -d /etc/service/subspace; then
mkdir /etc/service/subspace
cat <<RUNIT >/etc/service/subspace/run
#!/bin/sh
source /etc/envvars
exec /usr/bin/subspace \
"--http-host=${SUBSPACE_HTTP_HOST}" \
"--http-addr=${SUBSPACE_HTTP_ADDR}" \
"--http-insecure=${SUBSPACE_HTTP_INSECURE}" \
"--backlink=${SUBSPACE_BACKLINK}" \
"--letsencrypt=${SUBSPACE_LETSENCRYPT}" \
"--network-ipv4=${SUBSPACE_IPV4_POOL}" \
"--network-ipv6=${SUBSPACE_IPV6_POOL}" \
"--theme=${SUBSPACE_THEME}"
RUNIT
chmod +x /etc/service/subspace/run
# subspace service log
mkdir /etc/service/subspace/log
mkdir /etc/service/subspace/log/main
cat <<RUNIT >/etc/service/subspace/log/run
#!/bin/sh
exec svlogd -tt ./main
RUNIT
chmod +x /etc/service/subspace/log/run
fi
exec "$@"