--- /dev/null
+#!/bin/sh
+# Copyright (C) 2016 The Linux Containers Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Taken from https://github.com/lxc/lxd-pkg-ubuntu/blob/dpm-xenial/lxd-bridge/lxd-bridge
+# but modified for the use within anbox.
+
+varrun="/run/anbox"
+
+if [ -n "$SNAP_DATA" ]; then
+ varrun="$SNAP_DATA"/network
+fi
+
+BRIDGE="anbox0"
+
+# IPv4
+IPV4_ADDR="192.168.250.1"
+IPV4_NETMASK="255.255.255.0"
+IPV4_NETWORK="192.168.250.1/24"
+IPV4_BROADCAST="0.0.0.0"
+IPV4_NAT="true"
+
+if [ -n "$SNAP" ]; then
+ snap_ipv4_address=$(snapctl get bridge.address)
+ snap_ipv4_netmask=$(snapctl get bridge.netmask)
+ snap_ipv4_network=$(snapctl get bridge.network)
+ snap_ipv4_broadcast=$(snapctl get bridge.broadcast)
+ snap_enable_nat=$(snapctl get bridge.nat.enable)
+ if [ -n "$snap_ipv4_address" ]; then
+ IPV4_ADDR="$snap_ipv4_address"
+ fi
+ if [ -n "$snap_ipv4_netmask" ]; then
+ IPV4_NETMASK="$snap_ipv4_netmask"
+ fi
+ if [ -n "$snap_ipv4_network" ]; then
+ IPV4_NETWORK="$snap_ipv4_network"
+ fi
+ if [ -n "$snap_ipv4_broadcast" ]; then
+ IPV4_BROADCAST="$snap_ipv4_broadcast"
+ fi
+ if [ "$snap_enable_nat" = false ]; then
+ IPV4_NAT="false"
+ fi
+fi
+
+use_iptables_lock="-w"
+iptables -w -L -n > /dev/null 2>&1 || use_iptables_lock=""
+
+_netmask2cidr () {
+ # Assumes there's no "255." after a non-255 byte in the mask
+ local x=${1##*255.}
+ set -- "0^^^128^192^224^240^248^252^254^" "$(( (${#1} - ${#x})*2 ))" "${x%%.*}"
+ x=${1%%${3}*}
+ echo $(( ${2} + (${#x}/4) ))
+}
+
+ifdown() {
+ ip addr flush dev "${1}"
+ ip link set dev "${1}" down
+}
+
+ifup() {
+ [ "${HAS_IPV6}" = "true" ] && [ "${IPV6_PROXY}" = "true" ] && ip addr add fe80::1/64 dev "${1}"
+ if [ -n "${IPV4_NETMASK}" ] && [ -n "${IPV4_ADDR}" ]; then
+ MASK=$(_netmask2cidr ${IPV4_NETMASK})
+ CIDR_ADDR="${IPV4_ADDR}/${MASK}"
+ ip addr add "${CIDR_ADDR}" broadcast "${IPV4_BROADCAST}" dev "${1}"
+ fi
+ ip link set dev "${1}" up
+}
+
+start() {
+ [ ! -f "${varrun}/network_up" ] || { echo "anbox-bridge is already running"; exit 1; }
+
+ if [ -d /sys/class/net/${BRIDGE} ]; then
+ stop force 2>/dev/null || true
+ fi
+
+ FAILED=1
+
+ cleanup() {
+ set +e
+ if [ "${FAILED}" = "1" ]; then
+ echo "Failed to setup anbox-bridge." >&2
+ stop force
+ fi
+ }
+
+ trap cleanup EXIT HUP INT TERM
+ set -e
+
+ # set up the anbox network
+ [ ! -d "/sys/class/net/${BRIDGE}" ] && ip link add dev "${BRIDGE}" type bridge
+
+ # if we are run from systemd on a system with selinux enabled,
+ # the mkdir will create /run/anbox as init_var_run_t which dnsmasq
+ # can't write its pid into, so we restorecon it (to var_run_t)
+ if [ ! -d "${varrun}" ]; then
+ mkdir -p "${varrun}"
+ if which restorecon >/dev/null 2>&1; then
+ restorecon "${varrun}"
+ fi
+ fi
+
+ ifup "${BRIDGE}" "${IPV4_ADDR}" "${IPV4_NETMASK}"
+
+ IPV4_ARG=""
+ if [ -n "${IPV4_ADDR}" ] && [ -n "${IPV4_NETMASK}" ] && [ -n "${IPV4_NETWORK}" ]; then
+ echo 1 > /proc/sys/net/ipv4/ip_forward
+ if [ "${IPV4_NAT}" = "true" ]; then
+ iptables "${use_iptables_lock}" -t nat -A POSTROUTING -s "${IPV4_NETWORK}" ! -d "${IPV4_NETWORK}" -j MASQUERADE -m comment --comment "managed by anbox-bridge"
+ fi
+ fi
+
+ iptables "${use_iptables_lock}" -I INPUT -i "${BRIDGE}" -p udp --dport 67 -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables "${use_iptables_lock}" -I INPUT -i "${BRIDGE}" -p tcp --dport 67 -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables "${use_iptables_lock}" -I INPUT -i "${BRIDGE}" -p udp --dport 53 -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables "${use_iptables_lock}" -I INPUT -i "${BRIDGE}" -p tcp --dport 53 -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables "${use_iptables_lock}" -I FORWARD -i "${BRIDGE}" -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables "${use_iptables_lock}" -I FORWARD -o "${BRIDGE}" -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables "${use_iptables_lock}" -t mangle -A POSTROUTING -o "${BRIDGE}" -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill -m comment --comment "managed by anbox-bridge"
+
+ touch "${varrun}/network_up"
+ FAILED=0
+}
+
+stop() {
+ [ -f "${varrun}/network_up" ] || [ "${1}" = "force" ] || { echo "anbox-bridge isn't running"; exit 1; }
+
+ if [ -d /sys/class/net/${BRIDGE} ]; then
+ ifdown ${BRIDGE}
+ iptables ${use_iptables_lock} -D INPUT -i ${BRIDGE} -p udp --dport 67 -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables ${use_iptables_lock} -D INPUT -i ${BRIDGE} -p tcp --dport 67 -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables ${use_iptables_lock} -D INPUT -i ${BRIDGE} -p udp --dport 53 -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables ${use_iptables_lock} -D INPUT -i ${BRIDGE} -p tcp --dport 53 -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables ${use_iptables_lock} -D FORWARD -i ${BRIDGE} -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables ${use_iptables_lock} -D FORWARD -o ${BRIDGE} -j ACCEPT -m comment --comment "managed by anbox-bridge"
+ iptables ${use_iptables_lock} -t mangle -D POSTROUTING -o ${BRIDGE} -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill -m comment --comment "managed by anbox-bridge"
+
+ if [ -n "${IPV4_NETWORK}" ] && [ "${IPV4_NAT}" = "true" ]; then
+ iptables ${use_iptables_lock} -t nat -D POSTROUTING -s ${IPV4_NETWORK} ! -d ${IPV4_NETWORK} -j MASQUERADE -m comment --comment "managed by anbox-bridge"
+ fi
+
+ # if ${BRIDGE} has attached interfaces, don't destroy the bridge
+ ls /sys/class/net/${BRIDGE}/brif/* > /dev/null 2>&1 || ip link delete "${BRIDGE}"
+ fi
+
+ rm -f "${varrun}/network_up"
+}
+
+# See how we were called.
+case "${1}" in
+ start)
+ start
+ ;;
+
+ stop)
+ stop
+ ;;
+
+ restart|reload|force-reload)
+ ${0} stop
+ ${0} start
+ ;;
+
+ *)
+ echo "Usage: ${0} {start|stop|restart|reload|force-reload}"
+ exit 2
+esac
+
+exit $?
Code Review / iec.git / blobdiff