mirror of
https://github.com/netbirdio/netbird.git
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[client] Implement dns routes for Android (#3989)
This commit is contained in:
Viktor Liu
@@ -1,124 +0,0 @@
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package notifier
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import (
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"net/netip"
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"runtime"
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"sort"
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"strings"
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"sync"
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"github.com/netbirdio/netbird/client/internal/listener"
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"github.com/netbirdio/netbird/route"
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)
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type Notifier struct {
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initialRouteRanges []string
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routeRanges []string
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listener listener.NetworkChangeListener
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listenerMux sync.Mutex
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}
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func NewNotifier() *Notifier {
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return &Notifier{}
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}
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func (n *Notifier) SetListener(listener listener.NetworkChangeListener) {
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n.listenerMux.Lock()
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defer n.listenerMux.Unlock()
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n.listener = listener
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}
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func (n *Notifier) SetInitialClientRoutes(clientRoutes []*route.Route) {
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nets := make([]string, 0)
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for _, r := range clientRoutes {
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if r.IsDynamic() {
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continue
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}
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nets = append(nets, r.Network.String())
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}
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sort.Strings(nets)
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n.initialRouteRanges = nets
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}
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func (n *Notifier) OnNewRoutes(idMap route.HAMap) {
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if runtime.GOOS != "android" {
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return
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}
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var newNets []string
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for _, routes := range idMap {
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for _, r := range routes {
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if r.IsDynamic() {
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continue
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}
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newNets = append(newNets, r.Network.String())
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}
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}
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sort.Strings(newNets)
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if !n.hasDiff(n.initialRouteRanges, newNets) {
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return
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}
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n.routeRanges = newNets
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n.notify()
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}
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// OnNewPrefixes is called from iOS only
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func (n *Notifier) OnNewPrefixes(prefixes []netip.Prefix) {
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newNets := make([]string, 0)
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for _, prefix := range prefixes {
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newNets = append(newNets, prefix.String())
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}
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sort.Strings(newNets)
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if !n.hasDiff(n.routeRanges, newNets) {
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return
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}
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n.routeRanges = newNets
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n.notify()
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}
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func (n *Notifier) notify() {
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n.listenerMux.Lock()
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defer n.listenerMux.Unlock()
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if n.listener == nil {
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return
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}
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go func(l listener.NetworkChangeListener) {
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l.OnNetworkChanged(strings.Join(addIPv6RangeIfNeeded(n.routeRanges), ","))
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}(n.listener)
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}
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func (n *Notifier) hasDiff(a []string, b []string) bool {
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if len(a) != len(b) {
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return true
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}
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for i, v := range a {
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if v != b[i] {
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return true
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}
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}
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return false
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}
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func (n *Notifier) GetInitialRouteRanges() []string {
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return addIPv6RangeIfNeeded(n.initialRouteRanges)
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}
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// addIPv6RangeIfNeeded returns the input ranges with the default IPv6 range when there is an IPv4 default route.
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func addIPv6RangeIfNeeded(inputRanges []string) []string {
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ranges := inputRanges
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for _, r := range inputRanges {
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// we are intentionally adding the ipv6 default range in case of ipv4 default range
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// to ensure that all traffic is managed by the tunnel interface on android
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if r == "0.0.0.0/0" {
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ranges = append(ranges, "::/0")
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break
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}
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}
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return ranges
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}
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127
client/internal/routemanager/notifier/notifier_android.go
Normal file
127
client/internal/routemanager/notifier/notifier_android.go
Normal file
@@ -0,0 +1,127 @@
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//go:build android
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package notifier
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import (
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"net/netip"
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"slices"
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"sort"
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"strings"
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"sync"
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"github.com/netbirdio/netbird/client/internal/listener"
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"github.com/netbirdio/netbird/route"
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)
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type Notifier struct {
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initialRoutes []*route.Route
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currentRoutes []*route.Route
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listener listener.NetworkChangeListener
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listenerMux sync.Mutex
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}
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func NewNotifier() *Notifier {
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return &Notifier{}
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}
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func (n *Notifier) SetListener(listener listener.NetworkChangeListener) {
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n.listenerMux.Lock()
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defer n.listenerMux.Unlock()
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n.listener = listener
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}
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func (n *Notifier) SetInitialClientRoutes(initialRoutes []*route.Route, routesForComparison []*route.Route) {
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// initialRoutes contains fake IP block for interface configuration
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filteredInitial := make([]*route.Route, 0)
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for _, r := range initialRoutes {
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if r.IsDynamic() {
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continue
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}
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filteredInitial = append(filteredInitial, r)
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}
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n.initialRoutes = filteredInitial
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// routesForComparison excludes fake IP block for comparison with new routes
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filteredComparison := make([]*route.Route, 0)
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for _, r := range routesForComparison {
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if r.IsDynamic() {
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continue
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}
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filteredComparison = append(filteredComparison, r)
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}
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n.currentRoutes = filteredComparison
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}
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func (n *Notifier) OnNewRoutes(idMap route.HAMap) {
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var newRoutes []*route.Route
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for _, routes := range idMap {
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for _, r := range routes {
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if r.IsDynamic() {
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continue
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}
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newRoutes = append(newRoutes, r)
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}
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}
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if !n.hasRouteDiff(n.currentRoutes, newRoutes) {
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return
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}
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n.currentRoutes = newRoutes
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n.notify()
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}
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func (n *Notifier) OnNewPrefixes([]netip.Prefix) {
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// Not used on Android
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}
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func (n *Notifier) notify() {
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n.listenerMux.Lock()
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defer n.listenerMux.Unlock()
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if n.listener == nil {
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return
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}
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routeStrings := n.routesToStrings(n.currentRoutes)
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sort.Strings(routeStrings)
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go func(l listener.NetworkChangeListener) {
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l.OnNetworkChanged(strings.Join(n.addIPv6RangeIfNeeded(routeStrings, n.currentRoutes), ","))
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}(n.listener)
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}
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func (n *Notifier) routesToStrings(routes []*route.Route) []string {
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nets := make([]string, 0, len(routes))
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for _, r := range routes {
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nets = append(nets, r.NetString())
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}
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return nets
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}
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func (n *Notifier) hasRouteDiff(a []*route.Route, b []*route.Route) bool {
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slices.SortFunc(a, func(x, y *route.Route) int {
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return strings.Compare(x.NetString(), y.NetString())
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})
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slices.SortFunc(b, func(x, y *route.Route) int {
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return strings.Compare(x.NetString(), y.NetString())
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})
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return !slices.EqualFunc(a, b, func(x, y *route.Route) bool {
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return x.NetString() == y.NetString()
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})
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}
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func (n *Notifier) GetInitialRouteRanges() []string {
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initialStrings := n.routesToStrings(n.initialRoutes)
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sort.Strings(initialStrings)
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return n.addIPv6RangeIfNeeded(initialStrings, n.initialRoutes)
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}
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func (n *Notifier) addIPv6RangeIfNeeded(inputRanges []string, routes []*route.Route) []string {
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for _, r := range routes {
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if r.Network.Addr().Is4() && r.Network.Bits() == 0 {
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return append(slices.Clone(inputRanges), "::/0")
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}
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}
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return inputRanges
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}
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80
client/internal/routemanager/notifier/notifier_ios.go
Normal file
80
client/internal/routemanager/notifier/notifier_ios.go
Normal file
@@ -0,0 +1,80 @@
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//go:build ios
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package notifier
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import (
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"net/netip"
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"slices"
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"sort"
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"strings"
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"sync"
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"github.com/netbirdio/netbird/client/internal/listener"
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"github.com/netbirdio/netbird/route"
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)
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type Notifier struct {
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currentPrefixes []string
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listener listener.NetworkChangeListener
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listenerMux sync.Mutex
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}
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func NewNotifier() *Notifier {
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return &Notifier{}
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}
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func (n *Notifier) SetListener(listener listener.NetworkChangeListener) {
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n.listenerMux.Lock()
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defer n.listenerMux.Unlock()
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n.listener = listener
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}
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func (n *Notifier) SetInitialClientRoutes([]*route.Route, []*route.Route) {
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// iOS doesn't care about initial routes
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}
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func (n *Notifier) OnNewRoutes(route.HAMap) {
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// Not used on iOS
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}
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func (n *Notifier) OnNewPrefixes(prefixes []netip.Prefix) {
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newNets := make([]string, 0)
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for _, prefix := range prefixes {
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newNets = append(newNets, prefix.String())
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}
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sort.Strings(newNets)
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if slices.Equal(n.currentPrefixes, newNets) {
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return
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}
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n.currentPrefixes = newNets
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n.notify()
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}
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func (n *Notifier) notify() {
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n.listenerMux.Lock()
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defer n.listenerMux.Unlock()
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if n.listener == nil {
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return
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}
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go func(l listener.NetworkChangeListener) {
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l.OnNetworkChanged(strings.Join(n.addIPv6RangeIfNeeded(n.currentPrefixes), ","))
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}(n.listener)
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}
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func (n *Notifier) GetInitialRouteRanges() []string {
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return nil
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}
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func (n *Notifier) addIPv6RangeIfNeeded(inputRanges []string) []string {
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for _, r := range inputRanges {
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if r == "0.0.0.0/0" {
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return append(slices.Clone(inputRanges), "::/0")
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}
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}
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return inputRanges
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}
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36
client/internal/routemanager/notifier/notifier_other.go
Normal file
36
client/internal/routemanager/notifier/notifier_other.go
Normal file
@@ -0,0 +1,36 @@
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//go:build !android && !ios
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package notifier
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import (
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"net/netip"
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"github.com/netbirdio/netbird/client/internal/listener"
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"github.com/netbirdio/netbird/route"
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)
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type Notifier struct{}
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func NewNotifier() *Notifier {
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return &Notifier{}
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}
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func (n *Notifier) SetListener(listener listener.NetworkChangeListener) {
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// Not used on non-mobile platforms
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}
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func (n *Notifier) SetInitialClientRoutes([]*route.Route, []*route.Route) {
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// Not used on non-mobile platforms
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}
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func (n *Notifier) OnNewRoutes(idMap route.HAMap) {
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// Not used on non-mobile platforms
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}
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func (n *Notifier) OnNewPrefixes(prefixes []netip.Prefix) {
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// Not used on non-mobile platforms
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}
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func (n *Notifier) GetInitialRouteRanges() []string {
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return []string{}
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}
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