Added basic routes functionality

README.md

@@ -8,6 +8,7 @@ An open source implementation of the Tailscale coordination server.
 - [x] Node registration through the web flow
 - [x] Network changes are relied to the nodes
 - [x] ~~Multiuser~~ Namespace support
+- [x] Basic routing (advertise & accept) 
 - [ ] Share nodes between ~~users~~ namespaces
 - [ ] Node registration via pre-auth keys
 - [ ] ACLs

app.go

@@ -1,12 +1,15 @@
 package headscale
 
 import (
+	"encoding/json"
 	"fmt"
 	"log"
 	"os"
 	"sync"
 
 	"github.com/gin-gonic/gin"
+	"github.com/jinzhu/gorm/dialects/postgres"
+	"inet.af/netaddr"
 	"tailscale.com/tailcfg"
 	"tailscale.com/wgengine/wgcfg"
 )
@@ -113,3 +116,72 @@ func (h *Headscale) RegisterMachine(key string, namespace string) error {
 	fmt.Println("Machine registered 🎉")
 	return nil
 }
+
+func (h *Headscale) ListNodeRoutes(namespace string, nodeName string) error {
+	m, err := h.GetMachine(namespace, nodeName)
+	if err != nil {
+		return err
+	}
+
+	hi, err := m.GetHostInfo()
+	if err != nil {
+		return err
+	}
+	fmt.Println(hi.RoutableIPs)
+	return nil
+}
+
+func (h *Headscale) EnableNodeRoute(namespace string, nodeName string, routeStr string) error {
+	m, err := h.GetMachine(namespace, nodeName)
+	if err != nil {
+		return err
+	}
+	hi, err := m.GetHostInfo()
+	if err != nil {
+		return err
+	}
+	route, err := netaddr.ParseIPPrefix(routeStr)
+	if err != nil {
+		return err
+	}
+
+	for _, rIP := range hi.RoutableIPs {
+		if rIP == route {
+			db, err := h.db()
+			if err != nil {
+				log.Printf("Cannot open DB: %s", err)
+				return err
+			}
+			defer db.Close()
+			routes, _ := json.Marshal([]string{routeStr}) // TODO: only one for the time being, so overwriting the rest
+			m.EnabledRoutes = postgres.Jsonb{RawMessage: json.RawMessage(routes)}
+			db.Save(&m)
+			db.Close()
+
+			peers, _ := h.getPeers(*m)
+			h.pollMu.Lock()
+			for _, p := range *peers {
+				if pUp, ok := h.clientsPolling[uint64(p.ID)]; ok {
+					pUp <- []byte{}
+				} else {
+				}
+			}
+			h.pollMu.Unlock()
+			return nil
+		}
+	}
+	return fmt.Errorf("Could not find routable range")
+
+}
+
+func eqCIDRs(a, b []netaddr.IPPrefix) bool {
+	if len(a) != len(b) || ((a == nil) != (b == nil)) {
+		return false
+	}
+	for i, v := range a {
+		if v != b[i] {
+			return false
+		}
+	}
+	return true
+}

cmd/headscale/headscale.go

@@ -102,7 +102,7 @@ var createNamespaceCmd = &cobra.Command{
 
 var listNamespacesCmd = &cobra.Command{
 	Use:   "list",
-	Short: "Creates a new namespace",
+	Short: "List all the namespaces",
 	Run: func(cmd *cobra.Command, args []string) {
 		h, err := getHeadscaleApp()
 		if err != nil {
@@ -120,6 +120,55 @@ var listNamespacesCmd = &cobra.Command{
 	},
 }
 
+var nodeCmd = &cobra.Command{
+	Use:   "node",
+	Short: "Manage the nodes of Headscale",
+}
+
+var listRoutesCmd = &cobra.Command{
+	Use:   "list-routes NAMESPACE NODE",
+	Short: "List the routes exposed by this node",
+	Args: func(cmd *cobra.Command, args []string) error {
+		if len(args) < 2 {
+			return fmt.Errorf("Missing parameters")
+		}
+		return nil
+	},
+	Run: func(cmd *cobra.Command, args []string) {
+		h, err := getHeadscaleApp()
+		if err != nil {
+			log.Fatalf("Error initializing: %s", err)
+		}
+		err = h.ListNodeRoutes(args[0], args[1])
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+	},
+}
+
+var enableRouteCmd = &cobra.Command{
+	Use:   "enable-route",
+	Short: "Allows exposing a route declared by this node to the rest of the nodes",
+	Args: func(cmd *cobra.Command, args []string) error {
+		if len(args) < 3 {
+			return fmt.Errorf("Missing parameters")
+		}
+		return nil
+	},
+	Run: func(cmd *cobra.Command, args []string) {
+		h, err := getHeadscaleApp()
+		if err != nil {
+			log.Fatalf("Error initializing: %s", err)
+		}
+		err = h.EnableNodeRoute(args[0], args[1], args[2])
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+	},
+}
+
 func main() {
 	viper.SetConfigName("config")
 	viper.AddConfigPath(".")
@@ -136,6 +185,10 @@ func main() {
 	namespaceCmd.AddCommand(createNamespaceCmd)
 	namespaceCmd.AddCommand(listNamespacesCmd)
 
+	headscaleCmd.AddCommand(nodeCmd)
+	nodeCmd.AddCommand(listRoutesCmd)
+	nodeCmd.AddCommand(enableRouteCmd)
+
 	if err := headscaleCmd.Execute(); err != nil {
 		fmt.Println(err)
 		os.Exit(-1)

machine.go

@@ -8,6 +8,7 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/davecgh/go-spew/spew"
 	"github.com/jinzhu/gorm/dialects/postgres"
 	"inet.af/netaddr"
 	"tailscale.com/tailcfg"
@@ -29,8 +30,9 @@ type Machine struct {
 	LastSeen   *time.Time
 	Expiry     *time.Time
 
-	HostInfo  postgres.Jsonb
-	Endpoints postgres.Jsonb
+	HostInfo      postgres.Jsonb
+	Endpoints     postgres.Jsonb
+	EnabledRoutes postgres.Jsonb
 
 	CreatedAt time.Time
 	UpdatedAt time.Time
@@ -64,14 +66,34 @@ func (m Machine) toNode() (*tailcfg.Node, error) {
 	}
 
 	addrs := []netaddr.IPPrefix{}
-	allowedIPs := []netaddr.IPPrefix{}
-
 	ip, err := netaddr.ParseIPPrefix(fmt.Sprintf("%s/32", m.IPAddress))
 	if err != nil {
 		return nil, err
 	}
-	addrs = append(addrs, ip)           // missing the ipv6 ?
-	allowedIPs = append(allowedIPs, ip) // looks like the client expect this
+	addrs = append(addrs, ip) // missing the ipv6 ?
+
+	allowedIPs := []netaddr.IPPrefix{}
+	allowedIPs = append(allowedIPs, ip)
+
+	routesStr := []string{}
+	if len(m.EnabledRoutes.RawMessage) != 0 {
+		allwIps, err := m.EnabledRoutes.MarshalJSON()
+		if err != nil {
+			return nil, err
+		}
+		err = json.Unmarshal(allwIps, &routesStr)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	for _, aip := range routesStr {
+		ip, err := netaddr.ParseIPPrefix(aip)
+		if err != nil {
+			return nil, err
+		}
+		allowedIPs = append(allowedIPs, ip)
+	}
 
 	endpoints := []string{}
 	if len(m.Endpoints.RawMessage) != 0 {
@@ -126,6 +148,7 @@ func (m Machine) toNode() (*tailcfg.Node, error) {
 		MachineAuthorized: m.Registered,
 	}
 
+	spew.Dump(n)
 	// n.Key.MarshalText()
 	return &n, nil
 }
@@ -156,3 +179,32 @@ func (h *Headscale) getPeers(m Machine) (*[]*tailcfg.Node, error) {
 	sort.Slice(peers, func(i, j int) bool { return peers[i].ID < peers[j].ID })
 	return &peers, nil
 }
+
+func (h *Headscale) GetMachine(namespace string, name string) (*Machine, error) {
+	machines, err := h.ListMachinesInNamespace(namespace)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, m := range *machines {
+		if m.Name == name {
+			return &m, nil
+		}
+	}
+	return nil, fmt.Errorf("not found")
+}
+
+func (m *Machine) GetHostInfo() (*tailcfg.Hostinfo, error) {
+	hostinfo := tailcfg.Hostinfo{}
+	if len(m.HostInfo.RawMessage) != 0 {
+		hi, err := m.HostInfo.MarshalJSON()
+		if err != nil {
+			return nil, err
+		}
+		err = json.Unmarshal(hi, &hostinfo)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return &hostinfo, nil
+}