entrypoint.sh

#!/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_THEME-}" ]; then
  export SUBSPACE_THEME=""
fi

if [ -z "${SUBSPACE_IPV4_POOL-}" ]; then
  export SUBSPACE_IPV4_POOL="10.99.97.0/24"
fi
if [ -z "${SUBSPACE_IPV6_POOL-}" ]; then
  export SUBSPACE_IPV6_POOL="fd00::10:97:0/112"
fi
if [ -z "${SUBSPACE_NAMESERVER-}" ]; then
  export SUBSPACE_NAMESERVER="1.1.1.1"
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

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-}" ]; then
  export SUBSPACE_IPV6_NAT_ENABLED=1
fi

# Set DNS server
echo "nameserver ${SUBSPACE_NAMESERVER}" >/etc/resolv.conf

if [ -z "${SUBSPACE_DISABLE_MASQUERADE-}" ]; 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

  if [[ ${SUBSPACE_IPV6_NAT_ENABLED-} -gt 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

# 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

# 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 ${SUBSPACE_IPV6_GW}
fi
#
# WireGuard (${SUBSPACE_IPV4_POOL})
#
if ! test -d /data/wireguard; then
  mkdir /data/wireguard
  cd /data/wireguard

  mkdir clients
  mkdir clients/null
  touch clients/null/null.conf # So you can cat *.conf safely
  mkdir peers
  mkdir peers/null
  touch peers/null/null.conf # So you can cat *.conf safely
  mkdir server
  mkdir config

  # Generate public/private server keys.
  wg genkey | tee server/server.private | wg pubkey > server/server.public
fi

cat <<WGSERVER >/data/wireguard/server/server.conf
[Interface]
PrivateKey = $(cat /data/wireguard/server/server.private)
ListenPort = ${SUBSPACE_LISTENPORT}

WGSERVER
cat /data/wireguard/peers/*/*.conf >>/data/wireguard/server/server.conf

if ip link show wg0 2>/dev/null; then
  ip link del wg0
fi
ip link add wg0 type wireguard
export SUBSPACE_IPV4_CIDR=$(echo ${SUBSPACE_IPV4_POOL-} | cut -d '/' -f2)
ip addr add ${SUBSPACE_IPV4_GW}/${SUBSPACE_IPV4_CIDR} dev wg0
export SUBSPACE_IPV6_CIDR=$(echo ${SUBSPACE_IPV6_POOL-} | cut -d '/' -f2)
ip addr add ${SUBSPACE_IPV6_GW}/${SUBSPACE_IPV6_CIDR} dev wg0
wg setconf wg0 /data/wireguard/server/server.conf
ip link set wg0 up


# dnsmasq service
if ! test -d /etc/service/dnsmasq; then
  cat <<DNSMASQ >/etc/dnsmasq.conf
    # Only listen on necessary addresses.
    listen-address=127.0.0.1,${SUBSPACE_IPV4_GW},${SUBSPACE_IPV6_GW}

    # Never forward plain names (without a dot or domain part)
    domain-needed

    # Never forward addresses in the non-routed address spaces.
    bogus-priv
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

# subspace service
if ! test -d /etc/service/subspace; then
  mkdir /etc/service/subspace
  cat <<RUNIT >/etc/service/subspace/run
#!/bin/sh
exec /usr/bin/subspace \
    "--http-host=${SUBSPACE_HTTP_HOST}" \
    "--http-addr=${SUBSPACE_HTTP_ADDR}" \
    "--http-insecure=${SUBSPACE_HTTP_INSECURE}" \
    "--backlink=${SUBSPACE_BACKLINK}" \
    "--letsencrypt=${SUBSPACE_LETSENCRYPT}" \
    "--theme=${SUBSPACE_THEME}"
RUNIT
  chmod +x /etc/service/subspace/run

  # subspace service log
  mkdir -p /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 $@