Delete src/network.sh
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src/network.sh
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src/network.sh
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#!/usr/bin/env bash
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set -Eeuo pipefail
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# Docker environment variables
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: "${MAC:=""}"
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: "${MTU:=""}"
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: "${DHCP:="N"}"
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: "${NETWORK:="Y"}"
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: "${USER_PORTS:=""}"
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: "${HOST_PORTS:=""}"
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: "${ADAPTER:="virtio-net-pci"}"
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: "${VM_NET_DEV:=""}"
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: "${VM_NET_TAP:="qemu"}"
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: "${VM_NET_MAC:="$MAC"}"
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: "${VM_NET_HOST:="$APP"}"
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: "${VM_NET_IP:="20.20.20.21"}"
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: "${DNSMASQ_OPTS:=""}"
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: "${DNSMASQ:="/usr/sbin/dnsmasq"}"
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: "${DNSMASQ_CONF_DIR:="/etc/dnsmasq.d"}"
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ADD_ERR="Please add the following setting to your container:"
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# ######################################
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# Functions
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# ######################################
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configureDHCP() {
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# Create the necessary file structure for /dev/vhost-net
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if [ ! -c /dev/vhost-net ]; then
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if mknod /dev/vhost-net c 10 238; then
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chmod 660 /dev/vhost-net
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fi
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fi
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# Create a macvtap network for the VM guest
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{ msg=$(ip link add link "$VM_NET_DEV" name "$VM_NET_TAP" address "$VM_NET_MAC" type macvtap mode bridge 2>&1); rc=$?; } || :
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case "$msg" in
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"RTNETLINK answers: File exists"* )
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while ! ip link add link "$VM_NET_DEV" name "$VM_NET_TAP" address "$VM_NET_MAC" type macvtap mode bridge; do
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info "Waiting for macvtap interface to become available.."
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sleep 5
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done ;;
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"RTNETLINK answers: Invalid argument"* )
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error "Cannot create macvtap interface. Please make sure that the network type of the container is 'macvlan' and not 'ipvlan'."
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return 1 ;;
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"RTNETLINK answers: Operation not permitted"* )
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error "No permission to create macvtap interface. Please make sure that your host kernel supports it and that the NET_ADMIN capability is set."
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return 1 ;;
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*)
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[ -n "$msg" ] && echo "$msg" >&2
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if (( rc != 0 )); then
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error "Cannot create macvtap interface."
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return 1
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fi ;;
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esac
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if [[ "$MTU" != "0" ]] && [[ "$MTU" != "1500" ]]; then
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if ! ip link set dev "$VM_NET_TAP" mtu "$MTU"; then
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warn "Failed to set MTU size.."
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fi
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fi
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while ! ip link set "$VM_NET_TAP" up; do
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info "Waiting for MAC address $VM_NET_MAC to become available..."
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sleep 2
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done
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local TAP_NR TAP_PATH MAJOR MINOR
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TAP_NR=$(</sys/class/net/"$VM_NET_TAP"/ifindex)
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TAP_PATH="/dev/tap${TAP_NR}"
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# Create dev file (there is no udev in container: need to be done manually)
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IFS=: read -r MAJOR MINOR < <(cat /sys/devices/virtual/net/"$VM_NET_TAP"/tap*/dev)
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(( MAJOR < 1)) && error "Cannot find: sys/devices/virtual/net/$VM_NET_TAP" && return 1
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[[ ! -e "$TAP_PATH" ]] && [[ -e "/dev0/${TAP_PATH##*/}" ]] && ln -s "/dev0/${TAP_PATH##*/}" "$TAP_PATH"
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if [[ ! -e "$TAP_PATH" ]]; then
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{ mknod "$TAP_PATH" c "$MAJOR" "$MINOR" ; rc=$?; } || :
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(( rc != 0 )) && error "Cannot mknod: $TAP_PATH ($rc)" && return 1
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fi
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{ exec 30>>"$TAP_PATH"; rc=$?; } 2>/dev/null || :
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if (( rc != 0 )); then
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error "Cannot create TAP interface ($rc). $ADD_ERR --device-cgroup-rule='c *:* rwm'" && return 1
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fi
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{ exec 40>>/dev/vhost-net; rc=$?; } 2>/dev/null || :
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if (( rc != 0 )); then
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error "VHOST can not be found ($rc). $ADD_ERR --device=/dev/vhost-net" && return 1
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fi
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NET_OPTS="-netdev tap,id=hostnet0,vhost=on,vhostfd=40,fd=30"
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return 0
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}
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configureDNS() {
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# Create lease file for faster resolve
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echo "0 $VM_NET_MAC $VM_NET_IP $VM_NET_HOST 01:$VM_NET_MAC" > /var/lib/misc/dnsmasq.leases
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chmod 644 /var/lib/misc/dnsmasq.leases
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# dnsmasq configuration:
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DNSMASQ_OPTS+=" --dhcp-authoritative"
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# Set DHCP range and host
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DNSMASQ_OPTS+=" --dhcp-range=$VM_NET_IP,$VM_NET_IP"
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DNSMASQ_OPTS+=" --dhcp-host=$VM_NET_MAC,,$VM_NET_IP,$VM_NET_HOST,infinite"
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# Set DNS server and gateway
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DNSMASQ_OPTS+=" --dhcp-option=option:netmask,255.255.255.0"
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DNSMASQ_OPTS+=" --dhcp-option=option:router,${VM_NET_IP%.*}.1"
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DNSMASQ_OPTS+=" --dhcp-option=option:dns-server,${VM_NET_IP%.*}.1"
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# Add DNS entry for container
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DNSMASQ_OPTS+=" --address=/host.lan/${VM_NET_IP%.*}.1"
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DNSMASQ_OPTS=$(echo "$DNSMASQ_OPTS" | sed 's/\t/ /g' | tr -s ' ' | sed 's/^ *//')
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if [[ "${DEBUG_DNS:-}" == [Yy1]* ]]; then
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DNSMASQ_OPTS+=" -d"
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$DNSMASQ ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS} &
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return 0
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fi
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if ! $DNSMASQ ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS}; then
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error "Failed to start dnsmasq, reason: $?" && return 1
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fi
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return 0
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}
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getUserPorts() {
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local args=""
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local list=$1
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local ssh="22"
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local rdp="3389"
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[ -z "$list" ] && list="$ssh,$rdp" || list+=",$ssh,$rdp"
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list="${list//,/ }"
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list="${list## }"
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list="${list%% }"
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for port in $list; do
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args+="hostfwd=tcp::$port-$VM_NET_IP:$port,"
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done
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echo "${args%?}"
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return 0
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}
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getHostPorts() {
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local list=$1
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local vnc="5900"
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local web="8006"
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[ -z "$list" ] && list="$web" || list+=",$web"
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if [[ "${DISPLAY,,}" == "vnc" ]] || [[ "${DISPLAY,,}" == "web" ]]; then
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[ -z "$list" ] && list="$vnc" || list+=",$vnc"
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fi
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[ -z "$list" ] && echo "" && return 0
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if [[ "$list" != *","* ]]; then
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echo " ! --dport $list"
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else
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echo " -m multiport ! --dports $list"
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fi
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return 0
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}
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configureUser() {
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NET_OPTS="-netdev user,id=hostnet0,host=${VM_NET_IP%.*}.1,net=${VM_NET_IP%.*}.0/24,dhcpstart=$VM_NET_IP,hostname=$VM_NET_HOST"
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local forward
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forward=$(getUserPorts "$USER_PORTS")
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[ -n "$forward" ] && NET_OPTS+=",$forward"
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return 0
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}
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configureNAT() {
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local tuntap="TUN device is missing. $ADD_ERR --device /dev/net/tun"
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local tables="The 'ip_tables' kernel module is not loaded. Try this command: sudo modprobe ip_tables iptable_nat"
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# Create the necessary file structure for /dev/net/tun
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if [ ! -c /dev/net/tun ]; then
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[ ! -d /dev/net ] && mkdir -m 755 /dev/net
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if mknod /dev/net/tun c 10 200; then
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chmod 666 /dev/net/tun
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fi
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fi
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if [ ! -c /dev/net/tun ]; then
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error "$tuntap" && return 1
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fi
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# Check port forwarding flag
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if [[ $(< /proc/sys/net/ipv4/ip_forward) -eq 0 ]]; then
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{ sysctl -w net.ipv4.ip_forward=1 > /dev/null; rc=$?; } || :
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if (( rc != 0 )) || [[ $(< /proc/sys/net/ipv4/ip_forward) -eq 0 ]]; then
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error "IP forwarding is disabled. $ADD_ERR --sysctl net.ipv4.ip_forward=1" && return 1
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fi
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fi
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# Create a bridge with a static IP for the VM guest
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{ ip link add dev dockerbridge type bridge ; rc=$?; } || :
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if (( rc != 0 )); then
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error "Failed to create bridge. $ADD_ERR --cap-add NET_ADMIN" && return 1
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fi
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if ! ip address add "${VM_NET_IP%.*}.1/24" broadcast "${VM_NET_IP%.*}.255" dev dockerbridge; then
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error "Failed to add IP address pool!" && return 1
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fi
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while ! ip link set dockerbridge up; do
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info "Waiting for IP address to become available..."
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sleep 2
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done
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# QEMU Works with taps, set tap to the bridge created
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if ! ip tuntap add dev "$VM_NET_TAP" mode tap; then
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error "$tuntap" && return 1
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fi
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if [[ "$MTU" != "0" ]] && [[ "$MTU" != "1500" ]]; then
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if ! ip link set dev "$VM_NET_TAP" mtu "$MTU"; then
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warn "Failed to set MTU size.."
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fi
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fi
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GATEWAY_MAC=$(echo "$VM_NET_MAC" | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\).*$/02:\1:\2:\3:\4:\5/')
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if ! ip link set dev "$VM_NET_TAP" address "$GATEWAY_MAC"; then
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warn "Failed to set gateway MAC address.."
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fi
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while ! ip link set "$VM_NET_TAP" up promisc on; do
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info "Waiting for TAP to become available..."
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sleep 2
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done
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if ! ip link set dev "$VM_NET_TAP" master dockerbridge; then
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error "Failed to set IP link!" && return 1
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fi
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# Add internet connection to the VM
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update-alternatives --set iptables /usr/sbin/iptables-legacy > /dev/null
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update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy > /dev/null
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exclude=$(getHostPorts "$HOST_PORTS")
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if ! iptables -t nat -A POSTROUTING -o "$VM_NET_DEV" -j MASQUERADE; then
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error "$tables" && return 1
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fi
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# shellcheck disable=SC2086
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if ! iptables -t nat -A PREROUTING -i "$VM_NET_DEV" -d "$IP" -p tcp${exclude} -j DNAT --to "$VM_NET_IP"; then
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error "Failed to configure IP tables!" && return 1
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fi
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if ! iptables -t nat -A PREROUTING -i "$VM_NET_DEV" -d "$IP" -p udp -j DNAT --to "$VM_NET_IP"; then
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error "Failed to configure IP tables!" && return 1
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fi
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if (( KERNEL > 4 )); then
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# Hack for guest VMs complaining about "bad udp checksums in 5 packets"
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iptables -A POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM --checksum-fill > /dev/null 2>&1 || true
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fi
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NET_OPTS="-netdev tap,id=hostnet0,ifname=$VM_NET_TAP"
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if [ -c /dev/vhost-net ]; then
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{ exec 40>>/dev/vhost-net; rc=$?; } 2>/dev/null || :
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(( rc == 0 )) && NET_OPTS+=",vhost=on,vhostfd=40"
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fi
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NET_OPTS+=",script=no,downscript=no"
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configureDNS || return 1
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return 0
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}
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closeBridge() {
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local pid="/var/run/dnsmasq.pid"
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[ -s "$pid" ] && pKill "$(<"$pid")"
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[[ "${NETWORK,,}" == "user"* ]] && return 0
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ip link set "$VM_NET_TAP" down promisc off &> null || true
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ip link delete "$VM_NET_TAP" &> null || true
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ip link set dockerbridge down &> null || true
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ip link delete dockerbridge &> null || true
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return 0
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}
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closeNetwork() {
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# Shutdown nginx
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nginx -s stop 2> /dev/null
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fWait "nginx"
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[[ "$NETWORK" == [Nn]* ]] && return 0
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exec 30<&- || true
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exec 40<&- || true
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if [[ "$DHCP" != [Yy1]* ]]; then
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closeBridge
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return 0
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fi
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ip link set "$VM_NET_TAP" down || true
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ip link delete "$VM_NET_TAP" || true
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return 0
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}
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checkOS() {
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local name
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local os=""
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local if="macvlan"
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name=$(uname -a)
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[[ "${name,,}" == *"darwin"* ]] && os="Docker Desktop for macOS"
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[[ "${name,,}" == *"microsoft"* ]] && os="Docker Desktop for Windows"
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if [[ "$DHCP" == [Yy1]* ]]; then
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if="macvtap"
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[[ "${name,,}" == *"synology"* ]] && os="Synology Container Manager"
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fi
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if [ -n "$os" ]; then
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warn "you are using $os which does not support $if, please revert to bridge networking!"
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fi
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return 0
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}
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getInfo() {
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if [ -z "$VM_NET_DEV" ]; then
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# Give Kubernetes priority over the default interface
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[ -d "/sys/class/net/net0" ] && VM_NET_DEV="net0"
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[ -d "/sys/class/net/net1" ] && VM_NET_DEV="net1"
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[ -d "/sys/class/net/net2" ] && VM_NET_DEV="net2"
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[ -d "/sys/class/net/net3" ] && VM_NET_DEV="net3"
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# Automaticly detect the default network interface
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[ -z "$VM_NET_DEV" ] && VM_NET_DEV=$(awk '$2 == 00000000 { print $1 }' /proc/net/route)
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[ -z "$VM_NET_DEV" ] && VM_NET_DEV="eth0"
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fi
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if [ ! -d "/sys/class/net/$VM_NET_DEV" ]; then
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error "Network interface '$VM_NET_DEV' does not exist inside the container!"
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error "$ADD_ERR -e \"VM_NET_DEV=NAME\" to specify another interface name." && exit 26
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fi
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BASE_IP="${VM_NET_IP%.*}."
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if [ "${VM_NET_IP/$BASE_IP/}" -lt "3" ]; then
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error "Invalid VM_NET_IP, must end in a higher number than .3" && exit 27
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fi
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if [ -z "$MTU" ]; then
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MTU=$(cat "/sys/class/net/$VM_NET_DEV/mtu")
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fi
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if [ "$MTU" -gt "1500" ]; then
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info "MTU size is too large: $MTU, ignoring..." && MTU="0"
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fi
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if [[ "${ADAPTER,,}" != "virtio-net-pci" ]]; then
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if [[ "$MTU" != "0" ]] && [[ "$MTU" != "1500" ]]; then
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warn "MTU size is $MTU, but cannot be set for $ADAPTER adapters!" && MTU="0"
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fi
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fi
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if [[ "${BOOT_MODE:-}" == "windows_legacy" ]]; then
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if [[ "$MTU" != "0" ]] && [[ "$MTU" != "1500" ]]; then
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warn "MTU size is $MTU, but cannot be set for legacy Windows versions!" && MTU="0"
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fi
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fi
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if [ -z "$MAC" ]; then
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local file="$STORAGE/$PROCESS.mac"
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[ -s "$file" ] && MAC=$(<"$file")
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if [ -z "$MAC" ]; then
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# Generate MAC address based on Docker container ID in hostname
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MAC=$(echo "$HOST" | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\).*$/02:\1:\2:\3:\4:\5/')
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echo "${MAC^^}" > "$file"
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fi
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fi
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VM_NET_MAC="${MAC^^}"
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VM_NET_MAC="${VM_NET_MAC//-/:}"
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if [[ ${#VM_NET_MAC} == 12 ]]; then
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m="$VM_NET_MAC"
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VM_NET_MAC="${m:0:2}:${m:2:2}:${m:4:2}:${m:6:2}:${m:8:2}:${m:10:2}"
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fi
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if [[ ${#VM_NET_MAC} != 17 ]]; then
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error "Invalid MAC address: '$VM_NET_MAC', should be 12 or 17 digits long!" && exit 28
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fi
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GATEWAY=$(ip route list dev "$VM_NET_DEV" | awk ' /^default/ {print $3}' | head -n 1)
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IP=$(ip address show dev "$VM_NET_DEV" | grep inet | awk '/inet / { print $2 }' | cut -f1 -d/ | head -n 1)
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IP6=""
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# shellcheck disable=SC2143
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if [ -f /proc/net/if_inet6 ] && [ -n "$(ifconfig -a | grep inet6)" ]; then
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IP6=$(ip -6 addr show dev "$VM_NET_DEV" scope global up)
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[ -n "$IP6" ] && IP6=$(echo "$IP6" | sed -e's/^.*inet6 \([^ ]*\)\/.*$/\1/;t;d' | head -n 1)
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fi
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return 0
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}
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# ######################################
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# Configure Network
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# ######################################
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||||
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if [[ "$NETWORK" == [Nn]* ]]; then
|
||||
NET_OPTS=""
|
||||
return 0
|
||||
fi
|
||||
|
||||
getInfo
|
||||
html "Initializing network..."
|
||||
|
||||
if [[ "$DEBUG" == [Yy1]* ]]; then
|
||||
mtu=$(cat "/sys/class/net/$VM_NET_DEV/mtu")
|
||||
line="Host: $HOST IP: $IP Gateway: $GATEWAY Interface: $VM_NET_DEV MAC: $VM_NET_MAC MTU: $mtu"
|
||||
[[ "$MTU" != "0" ]] && [[ "$MTU" != "$mtu" ]] && line+=" ($MTU)"
|
||||
info "$line"
|
||||
if [ -f /etc/resolv.conf ]; then
|
||||
nameservers=$(grep '^nameserver*' /etc/resolv.conf | head -c -1 | sed 's/nameserver //g;' | sed -z 's/\n/, /g')
|
||||
[ -n "$nameservers" ] && info "Nameservers: $nameservers"
|
||||
fi
|
||||
echo
|
||||
fi
|
||||
|
||||
if [[ -d "/sys/class/net/$VM_NET_TAP" ]]; then
|
||||
info "Lingering interface will be removed..."
|
||||
ip link delete "$VM_NET_TAP" || true
|
||||
fi
|
||||
|
||||
if [[ "$DHCP" == [Yy1]* ]]; then
|
||||
|
||||
checkOS
|
||||
|
||||
if [[ "$IP" == "172."* ]]; then
|
||||
warn "container IP starts with 172.* which is often a sign that you are not on a macvlan network (required for DHCP)!"
|
||||
fi
|
||||
|
||||
# Configure for macvtap interface
|
||||
configureDHCP || exit 20
|
||||
|
||||
else
|
||||
|
||||
if [[ "$IP" != "172."* ]] && [[ "$IP" != "10.8"* ]] && [[ "$IP" != "10.9"* ]]; then
|
||||
checkOS
|
||||
fi
|
||||
|
||||
if [[ "${NETWORK,,}" != "user"* ]]; then
|
||||
|
||||
# Configure for tap interface
|
||||
if ! configureNAT; then
|
||||
|
||||
closeBridge
|
||||
NETWORK="user"
|
||||
warn "falling back to user-mode networking! Performance will be bad and port mapping will not work."
|
||||
|
||||
fi
|
||||
|
||||
fi
|
||||
|
||||
if [[ "${NETWORK,,}" == "user"* ]]; then
|
||||
|
||||
# Configure for user-mode networking (slirp)
|
||||
configureUser || exit 24
|
||||
|
||||
fi
|
||||
|
||||
fi
|
||||
|
||||
NET_OPTS+=" -device $ADAPTER,id=net0,netdev=hostnet0,romfile=,mac=$VM_NET_MAC"
|
||||
[[ "$MTU" != "0" ]] && [[ "$MTU" != "1500" ]] && NET_OPTS+=",host_mtu=$MTU"
|
||||
|
||||
html "Initialized network successfully..."
|
||||
return 0
|
||||
Loading…
Reference in a new issue