Add routing peer support (#441)

Handle routes updates from management

Manage routing firewall rules

Manage peer RIB table

Add get peer and get notification channel from the status recorder

Update interface peers allowed IPs

client/internal/routemanager/systemops.go

@@ -0,0 +1,55 @@
+package routemanager
+
+import (
+	"fmt"
+	"github.com/libp2p/go-netroute"
+	log "github.com/sirupsen/logrus"
+	"net"
+	"net/netip"
+)
+
+var errRouteNotFound = fmt.Errorf("route not found")
+
+func addToRouteTableIfNoExists(prefix netip.Prefix, addr string) error {
+	gateway, err := getExistingRIBRouteGateway(netip.MustParsePrefix("0.0.0.0/0"))
+	if err != nil && err != errRouteNotFound {
+		return err
+	}
+	prefixGateway, err := getExistingRIBRouteGateway(prefix)
+	if err != nil && err != errRouteNotFound {
+		return err
+	}
+
+	if prefixGateway != nil && !prefixGateway.Equal(gateway) {
+		log.Warnf("route for network %s already exist and is pointing to the gateway: %s, won't add another one", prefix, prefixGateway)
+		return nil
+	}
+	return addToRouteTable(prefix, addr)
+}
+
+func removeFromRouteTableIfNonSystem(prefix netip.Prefix, addr string) error {
+	addrIP := net.ParseIP(addr)
+	prefixGateway, err := getExistingRIBRouteGateway(prefix)
+	if err != nil {
+		return err
+	}
+	if prefixGateway != nil && !prefixGateway.Equal(addrIP) {
+		log.Warnf("route for network %s is pointing to a different gateway: %s, should be pointing to: %s, not removing", prefix, prefixGateway, addrIP)
+		return nil
+	}
+	return removeFromRouteTable(prefix)
+}
+
+func getExistingRIBRouteGateway(prefix netip.Prefix) (net.IP, error) {
+	r, err := netroute.New()
+	if err != nil {
+		return nil, err
+	}
+	_, _, localGatewayAddress, err := r.Route(prefix.Addr().AsSlice())
+	if err != nil {
+		log.Errorf("getting routes returned an error: %v", err)
+		return nil, errRouteNotFound
+	}
+
+	return localGatewayAddress, nil
+}