Merge commit 'b15ff53bc6dee36cecf28413554fb7c856ae0517' into usr-lib-merge

debian/compat

@@ -1 +1 @@
-9
+10

debian/control

@@ -3,22 +3,21 @@ Section: admin
 Priority: extra
 Maintainer: unman <unman@thirdeyesecurity.org>
 Build-Depends:
+    debhelper,
     libpam0g-dev,
     libqubes-rpc-filecopy-dev (>= 3.1.3),
     libvchan-xen-dev,
     python3,
     python3-setuptools,
-    debhelper,
     quilt,
     libxen-dev,
     pkg-config,
-    dh-systemd (>= 1.5),
     dh-python,
     lsb-release,
     xserver-xorg-dev,
     config-package-dev,
     pandoc,
-Standards-Version: 3.9.5
+Standards-Version: 4.4.0.1
 Homepage: https://www.qubes-os.org
 Vcs-Git: https://github.com/QubesOS/qubes-core-agent-linux
 

debian/qubes-core-agent-networking.install

@@ -11,8 +11,12 @@ etc/xen/scripts/vif-route-qubes
 lib/systemd/system/qubes-firewall.service
 lib/systemd/system/qubes-iptables.service
 lib/systemd/system/qubes-network.service
+lib/systemd/system/qubes-network-uplink.service
+lib/systemd/system/qubes-network-uplink@.service
 lib/systemd/system/qubes-updates-proxy.service
 usr/lib/qubes/init/network-proxy-setup.sh
+usr/lib/qubes/init/network-proxy-stop.sh
+usr/lib/qubes/init/network-uplink-wait.sh
 usr/lib/qubes/init/qubes-iptables
 usr/lib/qubes/iptables-updates-proxy
 usr/lib/qubes/qubes-setup-dnat-to-ns

init/functions

@@ -118,7 +118,7 @@ umount_retry() {
 
 get_mac_from_iface() {
     local iface="$1"
-    local mac
+    local mac=
     if [ "x$iface" != "x" ] && [ -e "/sys/class/net/$iface" ]; then
         mac="$(cat "/sys/class/net/$iface/address")"
     fi
@@ -127,7 +127,7 @@ get_mac_from_iface() {
 
 get_iface_from_mac() {
     local mac="$1"
-    local iface
+    local iface=
     if [ "x$mac" != "x" ]; then
         iface="$(ip -o link | grep -i "$mac" | awk '{print $2}' | cut -d ':' -f1)"
     fi
@@ -141,7 +141,7 @@ get_qubes_managed_iface() {
     qubes_iface="$(get_iface_from_mac "$mac")"
     if [ "x$qubes_iface" != "x" ]; then
         echo "$qubes_iface"
-    else
+    elif [ -e /sys/class/net/eth0 ]; then
         echo eth0
     fi
 }

network/ip6tables-enabled

@@ -26,6 +26,7 @@ COMMIT
 -A INPUT -m state --state INVALID -j DROP
 -A INPUT -i lo -j ACCEPT
 -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+-A INPUT ! -i vif+ -p udp -s fe80::/64 -d fe80::/64 --dport 546 -j ACCEPT
 -A INPUT -i vif+ -p icmpv6 --icmpv6-type router-advertisement -j DROP
 -A INPUT -i vif+ -p icmpv6 --icmpv6-type redirect -j DROP
 -A INPUT -i vif+ -p icmpv6 -j ACCEPT

network/setup-ip

@@ -3,6 +3,15 @@
 # Source Qubes library.
 # shellcheck disable=SC1091
 . /usr/lib/qubes/init/functions
+set -uo pipefail
+
+add_host_route () {
+    /sbin/ip -- route replace to unicast "$1" dev "$2" onlink scope host
+}
+
+add_default_route () {
+    /sbin/ip -- route replace to unicast default via "$1" dev "$2" onlink
+}
 
 configure_network() {
     local MAC="$1"
@@ -15,22 +24,27 @@ configure_network() {
     local gateway6="$8"
     local primary_dns="$9"
     local secondary_dns="${10}"
+    local netvm_mac=fe:ff:ff:ff:ff:ff
 
     /sbin/ifconfig "$INTERFACE" "$ip" netmask "$netmask"
+    /sbin/ip -- neighbour replace to "$gateway" dev "$INTERFACE" \
+        lladdr "$netvm_mac" nud permanent
     if [ -n "$ip6" ]; then
         /sbin/ifconfig "$INTERFACE" add "$ip6/$netmask6"
+        /sbin/ip -- neighbour replace to "$gateway6" dev "$INTERFACE" \
+            lladdr "$netvm_mac" nud permanent
     fi
     /sbin/ifconfig "$INTERFACE" up
 
     if [ -n "$gateway" ]; then
-        /sbin/route add -host "$gateway" dev "$INTERFACE"
+        add_host_route "$gateway" "$INTERFACE"
         if [ -n "$gateway6" ] && ! echo "$gateway6" | grep -q "^fe80:"; then
-            /sbin/route -6 add "$gateway6/$netmask6" dev "$INTERFACE"
+            add_host_route "$gateway6/$netmask6" "$INTERFACE"
         fi
         if ! qsvc disable-default-route ; then
-            /sbin/route add default gw "$gateway"
+            add_default_route "$gateway" "$INTERFACE"
             if [ -n "$gateway6" ]; then
-                /sbin/route -6 add default gw "$gateway6" dev "$INTERFACE"
+                add_default_route "$gateway6" "$INTERFACE"
             fi
         fi
     fi
@@ -159,67 +173,80 @@ qubes_ip_change_hook() {
 
 have_qubesdb || exit 0
 
-if [ -n "$INTERFACE" ]; then
-    if [ "$ACTION" == "add" ]; then
-        MAC="$(get_mac_from_iface "$INTERFACE")"
-        if [ -n "$MAC" ]; then
-            ip="$(/usr/bin/qubesdb-read "/net-config/$MAC/ip" 2> /dev/null)"
-            ip6="$(/usr/bin/qubesdb-read "/net-config/$MAC/ip6" 2> /dev/null)"
-            netmask="$(/usr/bin/qubesdb-read "/net-config/$MAC/netmask" 2> /dev/null)"
-            netmask6="$(/usr/bin/qubesdb-read "/net-config/$MAC/netmask6" 2> /dev/null)"
-            gateway="$(/usr/bin/qubesdb-read "/net-config/$MAC/gateway" 2> /dev/null)"
-            gateway6="$(/usr/bin/qubesdb-read "/net-config/$MAC/gateway6" 2> /dev/null)"
-
-            # Handle legacy values
-            LEGACY_MAC="$(/usr/bin/qubesdb-read /qubes-mac 2> /dev/null)"
-            if [ "$MAC" == "$LEGACY_MAC" ] || [ -z "$LEGACY_MAC" ]; then
-                if [ -z "$ip" ]; then
-                    ip="$(/usr/bin/qubesdb-read /qubes-ip 2> /dev/null)"
-                fi
-                if [ -z "$ip6" ]; then
-                    ip6="$(/usr/bin/qubesdb-read /qubes-ip6 2> /dev/null)"
-                fi
-                if [ -z "$gateway" ]; then
-                    gateway="$(/usr/bin/qubesdb-read /qubes-gateway 2> /dev/null)"
-                fi
-                if [ -z "$gateway6" ]; then
-                    gateway6="$(/usr/bin/qubesdb-read /qubes-gateway6 2> /dev/null)"
-                fi
-            fi
+ACTION="$1"
+INTERFACE="$2"
+
+if [ -z "$INTERFACE" ]; then
+    echo "Missing INTERFACE argument" >&2
+    exit 1
+fi
 
-            if [ -z "$netmask" ]; then
-                netmask="255.255.255.255"
+if [ "$ACTION" == "add" ]; then
+    MAC="$(get_mac_from_iface "$INTERFACE")"
+    if [ -n "$MAC" ]; then
+        ip="$(/usr/bin/qubesdb-read "/net-config/$MAC/ip" 2> /dev/null)" || ip=
+        ip6="$(/usr/bin/qubesdb-read "/net-config/$MAC/ip6" 2> /dev/null)" || ip6=
+        netmask="$(/usr/bin/qubesdb-read "/net-config/$MAC/netmask" 2> /dev/null)" || netmask=
+        netmask6="$(/usr/bin/qubesdb-read "/net-config/$MAC/netmask6" 2> /dev/null)" || netmask6=
+        gateway="$(/usr/bin/qubesdb-read "/net-config/$MAC/gateway" 2> /dev/null)" || gateway=
+        gateway6="$(/usr/bin/qubesdb-read "/net-config/$MAC/gateway6" 2> /dev/null)" || gateway6=
+
+        # Handle legacy values
+        LEGACY_MAC="$(/usr/bin/qubesdb-read /qubes-mac 2> /dev/null)" || LEGACY_MAC=
+        if [ "$MAC" == "$LEGACY_MAC" ] || [ -z "$LEGACY_MAC" ]; then
+            if [ -z "$ip" ]; then
+                ip="$(/usr/bin/qubesdb-read /qubes-ip 2> /dev/null)" || ip=
             fi
-            if [ -z "$netmask6" ]; then
-                netmask6="128"
+            if [ -z "$ip6" ]; then
+                ip6="$(/usr/bin/qubesdb-read /qubes-ip6 2> /dev/null)" || ip6=
             fi
+            if [ -z "$gateway" ]; then
+                gateway="$(/usr/bin/qubesdb-read /qubes-gateway 2> /dev/null)" || gateway=
+            fi
+            if [ -z "$gateway6" ]; then
+                gateway6="$(/usr/bin/qubesdb-read /qubes-gateway6 2> /dev/null)" || gateway6=
+            fi
+        fi
+
+        if [ -z "$netmask" ]; then
+            netmask="255.255.255.255"
+        fi
+        if [ -z "$netmask6" ]; then
+            netmask6="128"
+        fi
 
-            primary_dns=$(/usr/bin/qubesdb-read /qubes-primary-dns 2>/dev/null)
-            secondary_dns=$(/usr/bin/qubesdb-read /qubes-secondary-dns 2>/dev/null)
+        primary_dns=$(/usr/bin/qubesdb-read /qubes-primary-dns 2>/dev/null) || primary_dns=
+        secondary_dns=$(/usr/bin/qubesdb-read /qubes-secondary-dns 2>/dev/null) || secondary_dns=
 
-            if [ -n "$ip" ]; then
-                /sbin/ethtool -K "$INTERFACE" sg off
-                /sbin/ethtool -K "$INTERFACE" tx off
+        if [ -n "$ip" ]; then
+            /sbin/ethtool -K "$INTERFACE" sg off
+            /sbin/ethtool -K "$INTERFACE" tx off
 
-                # If NetworkManager is enabled, let it configure the network
-                if qsvc network-manager && [ -e /usr/bin/nmcli ]; then
-                    configure_network_nm "$MAC" "$INTERFACE" "$ip" "$ip6" "$netmask" "$netmask6" "$gateway" "$gateway6" "$primary_dns" "$secondary_dns"
-                else
-                    configure_network "$MAC" "$INTERFACE" "$ip" "$ip6" "$netmask" "$netmask6" "$gateway" "$gateway6" "$primary_dns" "$secondary_dns"
-                fi
+            # If NetworkManager is enabled, let it configure the network
+            if qsvc network-manager && [ -e /usr/bin/nmcli ]; then
+                configure_network_nm "$MAC" "$INTERFACE" "$ip" "$ip6" "$netmask" "$netmask6" "$gateway" "$gateway6" "$primary_dns" "$secondary_dns"
+            else
+                configure_network "$MAC" "$INTERFACE" "$ip" "$ip6" "$netmask" "$netmask6" "$gateway" "$gateway6" "$primary_dns" "$secondary_dns"
+            fi
 
-                network=$(qubesdb-read /qubes-netvm-network 2>/dev/null)
-                if [ -n "$network" ]; then
-                    if ! qsvc disable-dns-server; then
-                        configure_qubes_ns
-                    fi
-                    qubes_ip_change_hook
+            network=$(qubesdb-read /qubes-netvm-network 2>/dev/null) || network=
+            if [ -n "$network" ]; then
+                if ! qsvc disable-dns-server; then
+                    configure_qubes_ns
                 fi
+                qubes_ip_change_hook
             fi
         fi
-    elif [ "$ACTION" == "remove" ]; then
-        # If exists, we delete NetworkManager configuration file to prevent duplicate entries
-        nm_config="/etc/NetworkManager/system-connections/qubes-uplink-$INTERFACE"
-        rm -rf "$nm_config"
     fi
+elif [ "$ACTION" == "remove" ]; then
+    # make sure network is disabled, especially on shutdown, to prevent
+    # leaks when firewall will get stopped too
+    ip link set "$INTERFACE" down 2>/dev/null || :
+
+    # If exists, we delete NetworkManager configuration file to prevent duplicate entries
+    nm_config="/etc/NetworkManager/system-connections/qubes-uplink-$INTERFACE"
+    rm -rf "$nm_config"
+else
+    echo "Invalid action '$ACTION'" >&2
+    exit 1
 fi

network/udev-qubes-network.rules

@@ -1,5 +1,5 @@
 # old udev has ENV{ID_NET_DRIVER}
-SUBSYSTEMS=="xen", KERNEL=="eth*", ACTION=="add", ENV{ID_NET_DRIVER}=="vif", RUN+="/usr/lib/qubes/setup-ip"
-SUBSYSTEMS=="net", KERNEL=="eth*", ACTION=="remove", ENV{ID_NET_DRIVER}=="vif", RUN+="/usr/lib/qubes/setup-ip"
+SUBSYSTEMS=="xen", KERNEL=="eth*", ACTION=="add", ENV{ID_NET_DRIVER}=="vif", ENV{SYSTEMD_WANTS}+="qubes-network-uplink@%k.service"
+SUBSYSTEMS=="net", KERNEL=="eth*", ACTION=="remove", ENV{ID_NET_DRIVER}=="vif", ENV{SYSTEMD_WANTS}+="qubes-network-uplink@%k.service"
 # new udev has DRIVERS
-SUBSYSTEMS=="xen", KERNEL=="eth*", ACTION=="add", DRIVERS=="vif", RUN+="/usr/lib/qubes/setup-ip"
+SUBSYSTEMS=="xen", KERNEL=="eth*", ACTION=="add", DRIVERS=="vif", ENV{SYSTEMD_WANTS}+="qubes-network-uplink@%k.service"

network/vif-qubes-nat.sh

@@ -26,6 +26,7 @@ netns_appvm_if="${vif}"
 #               '----------------------------------'
 #
 
+readonly netvm_mac=fe:ff:ff:ff:ff:ff
 
 function run
 {
@@ -35,7 +36,12 @@ function run
 
 function netns
 {
-    run ip netns exec "$netns" "$@"
+    if [[ "$1" = 'ip' ]]; then
+        shift
+        run ip -n "$netns" "$@"
+    else
+        run ip netns exec "$netns" "$@"
+    fi
 }
 
 run ip addr flush dev "$netns_appvm_if"
@@ -46,9 +52,12 @@ if test "$command" == online; then
     run ip link set "$netns_appvm_if" netns "$netns"
 
     # keep the same MAC as the real vif interface, so NetworkManager will still
-    # ignore it
-    run ip link add "$netns_netvm_if" type veth peer name "$netvm_if" address fe:ff:ff:ff:ff:ff
-    run ip link set "$netns_netvm_if" netns "$netns"
+    # ignore it.
+    # for the peer interface, make sure that it has the same MAC address
+    # as the actual VM, so that our neighbor entry works.
+    run ip link add name "$netns_netvm_if" address "$mac" type veth \
+        peer name "$netvm_if" address "$netvm_mac"
+    run ip link set dev "$netns_netvm_if" netns "$netns"
 
     netns ip6tables -t raw -I PREROUTING -j DROP
     netns ip6tables -P INPUT DROP
@@ -85,6 +94,8 @@ if test "$command" == online; then
         netns iptables -t nat -I POSTROUTING -o "$netns_appvm_if" -s "$netvm_dns2_ip" -j SNAT --to-source "$appvm_dns2_ip"
     fi
 
+    netns ip neighbour add to "$appvm_ip" dev "$netns_appvm_if" lladdr "$mac" nud permanent
+    netns ip neighbour add to "$netvm_gw_ip" dev "$netns_netvm_if" lladdr "$netvm_mac" nud permanent
     netns ip addr add "$netvm_ip" dev "$netns_netvm_if"
     netns ip addr add "$appvm_gw_ip" dev "$netns_appvm_if"
 
@@ -94,10 +105,4 @@ if test "$command" == online; then
     netns ip route add "$appvm_ip" dev "$netns_appvm_if" src "$appvm_gw_ip"
     netns ip route add "$netvm_gw_ip" dev "$netns_netvm_if" src "$netvm_ip"
     netns ip route add default via "$netvm_gw_ip" dev "$netns_netvm_if" src "$netvm_ip"
-
-
-    #run ip addr add "$netvm_gw_ip" dev "$netvm_if"
-    #run ip link set "$netvm_if" up
-    #run ip route add "$netvm_ip" dev "$netvm_if" src "$netvm_gw_ip"
 fi
-

network/vif-route-qubes

@@ -24,6 +24,7 @@ dir=$(dirname "$0")
 # shellcheck disable=SC1091,SC1090
 . "$dir/vif-common.sh"
 
+set -o pipefail
 #main_ip=$(dom0_ip)
 
 # Network Hooks for triggering supplementary actions on AppVM connect
@@ -77,30 +78,34 @@ if [ "${ip}" ]; then
     appvm_ip="$(qubesdb-read "/mapped-ip/$ip4/visible-ip" 2>/dev/null || :)"
 fi
 
-# Apply NAT if IP visible from the VM is different than the "real" one
-# See vif-qubes-nat.sh for details
-# XXX: supported only for the first IPv4 address, IPv6 is dropped if this
-# feature is enabled
-if [ -n "$appvm_ip" ] && [ -n "$appvm_gw_ip" ] && [ "$appvm_ip" != "$netvm_ip" ]; then
-    # shellcheck disable=SC2154
-    if test "$command" == online; then
-        # shellcheck disable=SC2154
-        echo 1 >"/proc/sys/net/ipv4/conf/${vif}/proxy_arp"
-    fi
+readonly max_domid=32752
 
-    # shellcheck source=network/vif-qubes-nat.sh
-    . "$dir/vif-qubes-nat.sh"
+# if domid is 0 something is seriously wrong, so don’t check for that case
+if ! [[ $vif =~ ^vif([1-9][0-9]{,4})\.(0|[1-9][0-9]*)$ ]]; then
+    printf 'Bad interface name %q\n' "$vif">&2
+    exit 1
+fi
+
+domid=${BASH_REMATCH[1]} sub=${BASH_REMATCH[2]}
+
+# metric must be positive, but prefer later interface
+#  32752 is max XID aka domid
+if (( domid > max_domid )); then
+    printf %s\\n "domid $domid too large"
+    exit 1
 fi
+metric=$(( max_domid - domid ))
 
 # shellcheck disable=SC2154
 case "$command" in
     online)
-        ifconfig "${vif}" up
         echo 1 >"/proc/sys/net/ipv4/conf/${vif}/proxy_arp"
         ipcmd='add'
         iptables_cmd='-I PREROUTING 1'
         cmdprefix=''
         ipv6_disabled=$(cat /proc/sys/net/ipv6/conf/"${vif}"/disable_ipv6 || echo 1)
+        # without a MAC address we will fail later with a confusing error
+        mac=$(xenstore-read "backend/vif/$domid/$sub/mac") || exit 1
         ;;
     offline)
         do_without_error ifdown "${vif}"
@@ -112,38 +117,60 @@ case "$command" in
         ;;
 esac
 
-domid=${vif/vif/}
-domid=${domid/.*/}
-# metric must be possitive, but prefer later interface
-#  32752 is max XID aka domid
-metric=$(( 32752 - domid ))
-
+# Apply NAT if IP visible from the VM is different than the "real" one
+# See vif-qubes-nat.sh for details
+# XXX: supported only for the first IPv4 address, IPv6 is dropped if this
+# feature is enabled
+if [ -n "$appvm_ip" ] && [ -n "$appvm_gw_ip" ] && [ "$appvm_ip" != "$netvm_ip" ]; then
+    # shellcheck source=network/vif-qubes-nat.sh
+    . "$dir/vif-qubes-nat.sh"
+fi
 
+# add anti-spoofing rules before enabling the interface
 if [ "${ip}" ]; then
-    # If we've been given a list of IP addresses, then add routes from dom0 to
-    # the guest using those addresses.
+    # If we’ve been given a list of IP addresses, then add routes from us to
+    # the VMs we serve using those addresses.
     for addr in ${ip};
     do
-        if [[ "$addr" = *:* ]] && [[ "$ipv6_disabled" = 1 ]]; then
-            log error "Cannot set IPv6 route to ${addr}, IPv6 disabled in the kernel"
-            continue
-        fi
-        ${cmdprefix} ip route "${ipcmd}" "${addr}" dev "${vif}" metric "$metric"
         if [[ "$addr" = *:* ]]; then
             ipt=ip6tables-restore
         else
             ipt=iptables-restore
         fi
-        echo -e "*raw\\n$iptables_cmd -i ${vif} ! -s ${addr} -j DROP\\nCOMMIT" | \
+        printf '%s\n' "*raw" \
+            "$iptables_cmd -i ${vif} ! -s ${addr} -j DROP" \
+            "$iptables_cmd ! -i vif+ -s ${addr} -j DROP" \
+            "COMMIT" | \
             ${cmdprefix} $ipt --noflush $ipt_arg
-
-        network_hooks "${command}" "${vif}" "${addr}"
+        if [[ "$command" = 'online' ]]; then
+            ip -- neighbour "${ipcmd}" to "${addr}" \
+                dev "${vif}" lladdr "$mac" nud permanent
+        fi
     done
     # if no IPv6 is assigned, block all IPv6 traffic on that interface
     if ! [[ "$ip" = *:* ]]; then
         echo -e "*raw\\n$iptables_cmd -i ${vif} -j DROP\\nCOMMIT" | \
             ${cmdprefix} ip6tables-restore --noflush $ipt_arg
     fi
+fi
+
+if [ "$command" = "online" ]; then
+    ifconfig "${vif}" up
+fi
+
+if [ "${ip}" ]; then
+    # If we've been given a list of IP addresses, then add routes from dom0 to
+    # the guest using those addresses.
+    for addr in ${ip};
+    do
+        if [[ "$addr" = *:* ]] && [[ "$ipv6_disabled" = 1 ]]; then
+            log error "Cannot set IPv6 route to ${addr}, IPv6 disabled in the kernel"
+            continue
+        fi
+        ${cmdprefix} ip route "${ipcmd}" "${addr}" dev "${vif}" metric "$metric"
+
+        network_hooks "${command}" "${vif}" "${addr}"
+    done
     ${cmdprefix} ip addr "${ipcmd}" "${back_ip}/32" dev "${vif}"
     if [ "${back_ip6}" ] && [[ "${back_ip6}" != "fe80:"* ]] && [[ "$ipv6_disabled" != 1 ]]; then
         ${cmdprefix} ip addr "${ipcmd}" "${back_ip6}/128" dev "${vif}"

qubes-rpc/qubes.GetAppmenus

@@ -9,12 +9,8 @@
 # Reload scripts in /etc/profile.d/, in case they register additional
 # directories in XDG_DATA_DIRS and we forgot them
 # (e.g. because we are running under sudo).
-for i in /etc/profile.d/*.sh ; do
-    if [ -r "$i" ]; then
-        # shellcheck disable=SC1090
-        . "$i" >/dev/null
-    fi
-done
+# shellcheck disable=SC1091
+source /etc/profile
 
 if [ -z "$XDG_DATA_HOME" ]; then
     user="$(whoami)"

qubes-rpc/qubes.ShowInTerminal

@@ -1,10 +1,11 @@
 #!/bin/bash --
 
 set -eu
+umask 0077
 tmpdir="$(mktemp -d)"
 
-if [[ $tmpdir =~ \" ]]; then
-    echo 'Error: non admissible character detected in sock path.'
+if ! [[ $tmpdir =~ ^/[/A-Za-z0-9._-]+$ ]]; then
+    echo 'Error: non admissible character detected in sock path.'>&2
     exit 1
 fi
 

rpm_spec/core-agent.spec.in

@@ -797,8 +797,12 @@ rm -f %{name}-%{version}
 /lib/systemd/system/qubes-firewall.service
 /lib/systemd/system/qubes-iptables.service
 /lib/systemd/system/qubes-network.service
+/lib/systemd/system/qubes-network-uplink.service
+/lib/systemd/system/qubes-network-uplink@.service
 /lib/systemd/system/qubes-updates-proxy.service
 /usr/lib/qubes/init/network-proxy-setup.sh
+/usr/lib/qubes/init/network-proxy-stop.sh
+/usr/lib/qubes/init/network-uplink-wait.sh
 /usr/lib/qubes/init/qubes-iptables
 /usr/lib/qubes/iptables-updates-proxy
 /usr/lib/qubes/qubes-setup-dnat-to-ns

vm-systemd/75-qubes-vm.preset

@@ -91,6 +91,7 @@ enable qubes-update-check.timer
 enable qubes-misc-post.service
 enable qubes-updates-proxy.service
 enable qubes-network.service
+enable qubes-network-uplink.service
 enable qubes-qrexec-agent.service
 enable qubes-mount-dirs.service
 enable qubes-rootfs-resize.service

vm-systemd/NetworkManager.service.d/30_qubes.conf

@@ -4,6 +4,8 @@ ConditionPathExists=/var/run/qubes-service/network-manager
 After=qubes-mount-dirs.service
 # For /var/run/qubes-service
 After=qubes-sysinit.service
+# For configuration of qubes-provided interfaces
+After=qubes-network-uplink.service
 
 [Service]
 ExecStartPre=/usr/lib/qubes/network-manager-prepare-conf-dir

vm-systemd/misc-post.sh

@@ -11,15 +11,6 @@ if [ -n "$(ls -A /usr/local/lib 2>/dev/null)" ] || \
     ldconfig
 fi
 
-# Set IP address again (besides action in udev rules); this is needed by
-# DispVM (to override DispVM-template IP) and in case when qubes-ip was
-# called by udev before loading evtchn kernel module - in which case
-# qubesdb-read fails
-QUBES_MANAGED_IFACE="$(get_qubes_managed_iface)"
-if [ "x$QUBES_MANAGED_IFACE" != "x" ]; then
-INTERFACE="$QUBES_MANAGED_IFACE" ACTION="add" /usr/lib/qubes/setup-ip
-fi
-
 if [ -x /rw/config/rc.local ] ; then
     /rw/config/rc.local
 fi

vm-systemd/network-proxy-stop.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+echo 0 > /proc/sys/net/ipv4/ip_forward
+# disable also IPv6 forwarding, if IPv6 applicable
+if [ -w /proc/sys/net/ipv6/conf/all/forwarding ]; then
+    echo 0 > /proc/sys/net/ipv6/conf/all/forwarding
+fi

vm-systemd/network-uplink-wait.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+# Source Qubes library.
+# shellcheck source=init/functions
+. /usr/lib/qubes/init/functions
+
+# Setup IP address at specific time of system boot, instead of asynchronously
+# by udev
+QUBES_MANAGED_IFACE="$(get_qubes_managed_iface)"
+if [ "x$QUBES_MANAGED_IFACE" != "x" ]; then
+    # systemd does not support conditional After= dependencies, nor a tool to
+    # just wait for the unit to be activated
+    # if the network interface is expected, use `systemctl start` to wait for
+    # it to be started - it would be started by udev (SYSTEMD_WANTS) anyway
+    systemctl start "qubes-network-uplink@$QUBES_MANAGED_IFACE.service"
+fi

vm-systemd/qubes-early-vm-config.service

@@ -1,7 +1,7 @@
 [Unit]
 Description=Early Qubes VM settings
 DefaultDependencies=no
-Before=sysinit.target
+Before=sysinit.target network-pre.target
 After=local-fs.target qubes-db.service
 
 [Service]

vm-systemd/qubes-network-uplink.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Qubes network uplink wait
+Before=network.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/lib/qubes/init/network-uplink-wait.sh
+
+[Install]
+WantedBy=multi-user.target

vm-systemd/qubes-network-uplink@.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Qubes network uplink (%i) setup
+After=network-pre.target qubes-iptables.service
+After=sys-subsystem-net-devices-%i.device
+BindsTo=sys-subsystem-net-devices-%i.device
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/lib/qubes/setup-ip add "%i"
+ExecStop=/usr/lib/qubes/setup-ip remove "%i"

vm-systemd/qubes-network.service

@@ -8,6 +8,7 @@ After=network-pre.target qubes-iptables.service
 Type=oneshot
 RemainAfterExit=yes
 ExecStart=/usr/lib/qubes/init/network-proxy-setup.sh
+ExecStop=/usr/lib/qubes/init/network-proxy-stop.sh
 
 [Install]
 WantedBy=multi-user.target