riscli: Add "get routers" feature (#431)

Co-authored-by: Marvin Gaube <marvin.gaube@exaring.de>

cmd/riscli/main.go

@@ -10,7 +10,6 @@ import (
 )
 
 func main() {
-
 	logger := logrus.New()
 	logger.SetLevel(logrus.InfoLevel)
 	log.SetLogger(log.NewLogrusWrapper(logger))
@@ -49,6 +48,7 @@ func main() {
 		NewObserveRIBCommand(),
 		NewDumpLocRIBCommand(),
 		NewLPMCommand(),
+		NewGetRoutersCommand(),
 	}
 
 	err := app.Run(os.Args)

cmd/riscli/routers.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	pb "github.com/bio-routing/bio-rd/cmd/ris/api"
+	"github.com/bio-routing/bio-rd/routingtable/vrf"
+	"github.com/bio-routing/bio-rd/util/log"
+	"github.com/urfave/cli"
+)
+
+// NewLPMCommand creates a new LPM command
+func NewGetRoutersCommand() cli.Command {
+	cmd := cli.Command{
+		Name:  "routers",
+		Usage: "get all routers and vrfs available",
+		Flags: []cli.Flag{},
+	}
+
+	cmd.Action = func(c *cli.Context) error {
+		conn := SetupGRPCClient(c)
+		defer conn.Close()
+
+		client := pb.NewRoutingInformationServiceClient(conn)
+		err := getRouters(client)
+		if err != nil {
+			log.Errorf("Get Routers failed: %v", err)
+			os.Exit(1)
+		}
+
+		return nil
+	}
+
+	return cmd
+}
+
+func getRouters(c pb.RoutingInformationServiceClient) error {
+	resp, err := c.GetRouters(context.Background(), &pb.GetRoutersRequest{})
+	if err != nil {
+		return fmt.Errorf("unable to get client: %w", err)
+	}
+	for _, r := range resp.GetRouters() {
+		fmt.Printf("Router %s at %s\n", r.SysName, r.Address)
+		fmt.Println("VRFs:")
+		for _, v := range r.VrfIds {
+			fmt.Printf("%s (Numeric: %v)\n", vrf.RouteDistinguisherHumanReadable(v), v)
+		}
+		fmt.Println("---")
+	}
+	return nil
+}