Support DNS routes on iOS (#2254)

client/internal/routemanager/systemops/systemops_ios.go

@@ -0,0 +1,64 @@
+//go:build ios
+
+package systemops
+
+import (
+	"net"
+	"net/netip"
+	"runtime"
+
+	log "github.com/sirupsen/logrus"
+
+	nbnet "github.com/netbirdio/netbird/util/net"
+)
+
+func (r *SysOps) SetupRouting([]net.IP) (nbnet.AddHookFunc, nbnet.RemoveHookFunc, error) {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	r.prefixes = make(map[netip.Prefix]struct{})
+	return nil, nil, nil
+}
+
+func (r *SysOps) CleanupRouting() error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	r.prefixes = make(map[netip.Prefix]struct{})
+	r.notify()
+	return nil
+}
+
+func (r *SysOps) AddVPNRoute(prefix netip.Prefix, _ *net.Interface) error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	r.prefixes[prefix] = struct{}{}
+	r.notify()
+	return nil
+}
+
+func (r *SysOps) RemoveVPNRoute(prefix netip.Prefix, _ *net.Interface) error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	delete(r.prefixes, prefix)
+	r.notify()
+	return nil
+}
+
+func EnableIPForwarding() error {
+	log.Infof("Enable IP forwarding is not implemented on %s", runtime.GOOS)
+	return nil
+}
+
+func IsAddrRouted(netip.Addr, []netip.Prefix) (bool, netip.Prefix) {
+	return false, netip.Prefix{}
+}
+
+func (r *SysOps) notify() {
+	prefixes := make([]netip.Prefix, 0, len(r.prefixes))
+	for prefix := range r.prefixes {
+		prefixes = append(prefixes, prefix)
+	}
+	r.notifier.OnNewPrefixes(prefixes)
+}