mirror of
https://github.com/juanfont/headscale.git
synced 2024-11-26 08:53:05 +00:00
move derp_server to derp server module
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby
Kristoffer Dalby
parent
8c4c4c8633
commit
80ea87c032
2 changed files with 80 additions and 59 deletions
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@ -25,6 +25,7 @@ import (
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v1 "github.com/juanfont/headscale/gen/go/headscale/v1"
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"github.com/juanfont/headscale/hscontrol/db"
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"github.com/juanfont/headscale/hscontrol/derp"
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derpServer "github.com/juanfont/headscale/hscontrol/derp/server"
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"github.com/juanfont/headscale/hscontrol/policy"
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"github.com/juanfont/headscale/hscontrol/types"
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"github.com/juanfont/headscale/hscontrol/util"
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@ -79,7 +80,7 @@ type Headscale struct {
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noisePrivateKey *key.MachinePrivate
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DERPMap *tailcfg.DERPMap
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DERPServer *DERPServer
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DERPServer *derpServer.DERPServer
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ACLPolicy *policy.ACLPolicy
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@ -202,7 +203,8 @@ func NewHeadscale(cfg *types.Config) (*Headscale, error) {
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}
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if cfg.DERP.ServerEnabled {
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embeddedDERPServer, err := app.NewDERPServer()
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// TODO(kradalby): replace this key with a dedicated DERP key.
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embeddedDERPServer, err := derpServer.NewDERPServer(cfg.ServerURL, key.NodePrivate(*privateKey), &cfg.DERP)
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if err != nil {
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return nil, err
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}
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@ -237,7 +239,7 @@ func (h *Headscale) expireExpiredMachines(milliSeconds int64) {
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}
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// scheduledDERPMapUpdateWorker refreshes the DERPMap stored on the global object
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// at a set interval
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// at a set interval.
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func (h *Headscale) scheduledDERPMapUpdateWorker(cancelChan <-chan struct{}) {
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log.Info().
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Dur("frequency", h.cfg.DERP.UpdateFrequency).
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@ -253,7 +255,8 @@ func (h *Headscale) scheduledDERPMapUpdateWorker(cancelChan <-chan struct{}) {
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log.Info().Msg("Fetching DERPMap updates")
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h.DERPMap = derp.GetDERPMap(h.cfg.DERP)
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if h.cfg.DERP.ServerEnabled {
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h.DERPMap.Regions[h.DERPServer.region.RegionID] = &h.DERPServer.region
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region, _ := h.DERPServer.GenerateRegion()
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h.DERPMap.Regions[region.RegionID] = ®ion
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}
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h.setLastStateChangeToNow()
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@ -456,9 +459,9 @@ func (h *Headscale) createRouter(grpcMux *runtime.ServeMux) *mux.Router {
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Methods(http.MethodGet)
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if h.cfg.DERP.ServerEnabled {
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router.HandleFunc("/derp", h.DERPHandler)
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router.HandleFunc("/derp/probe", h.DERPProbeHandler)
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router.HandleFunc("/bootstrap-dns", h.DERPBootstrapDNSHandler)
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router.HandleFunc("/derp", h.DERPServer.DERPHandler)
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router.HandleFunc("/derp/probe", derpServer.DERPProbeHandler)
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router.HandleFunc("/bootstrap-dns", derpServer.DERPBootstrapDNSHandler(h.DERPMap))
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}
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apiRouter := router.PathPrefix("/api").Subrouter()
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@ -483,8 +486,14 @@ func (h *Headscale) Serve() error {
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return errSTUNAddressNotSet
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}
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h.DERPMap.Regions[h.DERPServer.region.RegionID] = &h.DERPServer.region
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go h.ServeSTUN()
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region, err := h.DERPServer.GenerateRegion()
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if err != nil {
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return err
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}
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h.DERPMap.Regions[region.RegionID] = ®ion
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go h.DERPServer.ServeSTUN()
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}
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if h.cfg.DERP.AutoUpdate {
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@ -1,4 +1,4 @@
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package hscontrol
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package server
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import (
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"context"
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@ -12,6 +12,7 @@ import (
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"strings"
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"time"
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"github.com/juanfont/headscale/hscontrol/types"
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"github.com/rs/zerolog/log"
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"tailscale.com/derp"
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"tailscale.com/net/stun"
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@ -26,23 +27,30 @@ import (
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const fastStartHeader = "Derp-Fast-Start"
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type DERPServer struct {
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serverURL string
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key key.NodePrivate
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cfg *types.DERPConfig
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tailscaleDERP *derp.Server
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region tailcfg.DERPRegion
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}
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func (h *Headscale) NewDERPServer() (*DERPServer, error) {
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func NewDERPServer(
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serverURL string,
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derpKey key.NodePrivate,
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cfg *types.DERPConfig,
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) (*DERPServer, error) {
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log.Trace().Caller().Msg("Creating new embedded DERP server")
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server := derp.NewServer(key.NodePrivate(*h.privateKey2019), log.Info().Msgf)
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region, err := h.generateRegionLocalDERP()
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if err != nil {
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return nil, err
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}
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server := derp.NewServer(derpKey, log.Debug().Msgf)
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return &DERPServer{server, region}, nil
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return &DERPServer{
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serverURL: serverURL,
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key: derpKey,
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cfg: cfg,
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tailscaleDERP: server,
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}, nil
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}
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func (h *Headscale) generateRegionLocalDERP() (tailcfg.DERPRegion, error) {
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serverURL, err := url.Parse(h.cfg.ServerURL)
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func (d *DERPServer) GenerateRegion() (tailcfg.DERPRegion, error) {
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serverURL, err := url.Parse(d.serverURL)
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if err != nil {
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return tailcfg.DERPRegion{}, err
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}
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@ -65,21 +73,21 @@ func (h *Headscale) generateRegionLocalDERP() (tailcfg.DERPRegion, error) {
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}
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localDERPregion := tailcfg.DERPRegion{
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RegionID: h.cfg.DERP.ServerRegionID,
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RegionCode: h.cfg.DERP.ServerRegionCode,
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RegionName: h.cfg.DERP.ServerRegionName,
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RegionID: d.cfg.ServerRegionID,
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RegionCode: d.cfg.ServerRegionCode,
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RegionName: d.cfg.ServerRegionName,
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Avoid: false,
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Nodes: []*tailcfg.DERPNode{
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{
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Name: fmt.Sprintf("%d", h.cfg.DERP.ServerRegionID),
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RegionID: h.cfg.DERP.ServerRegionID,
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Name: fmt.Sprintf("%d", d.cfg.ServerRegionID),
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RegionID: d.cfg.ServerRegionID,
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HostName: host,
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DERPPort: port,
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},
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},
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}
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_, portSTUNStr, err := net.SplitHostPort(h.cfg.DERP.STUNAddr)
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_, portSTUNStr, err := net.SplitHostPort(d.cfg.STUNAddr)
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if err != nil {
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return tailcfg.DERPRegion{}, err
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}
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@ -94,7 +102,7 @@ func (h *Headscale) generateRegionLocalDERP() (tailcfg.DERPRegion, error) {
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return localDERPregion, nil
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}
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func (h *Headscale) DERPHandler(
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func (d *DERPServer) DERPHandler(
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writer http.ResponseWriter,
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req *http.Request,
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) {
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@ -156,7 +164,7 @@ func (h *Headscale) DERPHandler(
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log.Trace().Caller().Msgf("Hijacked connection from %v", req.RemoteAddr)
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if !fastStart {
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pubKey := h.privateKey2019.Public()
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pubKey := d.key.Public()
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pubKeyStr, _ := pubKey.MarshalText() //nolint
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fmt.Fprintf(conn, "HTTP/1.1 101 Switching Protocols\r\n"+
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"Upgrade: DERP\r\n"+
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@ -167,12 +175,12 @@ func (h *Headscale) DERPHandler(
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string(pubKeyStr))
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}
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h.DERPServer.tailscaleDERP.Accept(req.Context(), netConn, conn, netConn.RemoteAddr().String())
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d.tailscaleDERP.Accept(req.Context(), netConn, conn, netConn.RemoteAddr().String())
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}
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// DERPProbeHandler is the endpoint that js/wasm clients hit to measure
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// DERP latency, since they can't do UDP STUN queries.
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func (h *Headscale) DERPProbeHandler(
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func DERPProbeHandler(
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writer http.ResponseWriter,
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req *http.Request,
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) {
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@ -199,43 +207,47 @@ func (h *Headscale) DERPProbeHandler(
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// The initial implementation is here https://github.com/tailscale/tailscale/pull/1406
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// They have a cache, but not clear if that is really necessary at Headscale, uh, scale.
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// An example implementation is found here https://derp.tailscale.com/bootstrap-dns
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func (h *Headscale) DERPBootstrapDNSHandler(
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writer http.ResponseWriter,
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req *http.Request,
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) {
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dnsEntries := make(map[string][]net.IP)
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func DERPBootstrapDNSHandler(
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derpMap *tailcfg.DERPMap,
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) func(http.ResponseWriter, *http.Request) {
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return func(
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writer http.ResponseWriter,
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req *http.Request,
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) {
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dnsEntries := make(map[string][]net.IP)
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resolvCtx, cancel := context.WithTimeout(req.Context(), time.Minute)
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defer cancel()
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var resolver net.Resolver
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for _, region := range h.DERPMap.Regions {
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for _, node := range region.Nodes { // we don't care if we override some nodes
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addrs, err := resolver.LookupIP(resolvCtx, "ip", node.HostName)
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if err != nil {
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log.Trace().
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Caller().
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Err(err).
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Msgf("bootstrap DNS lookup failed %q", node.HostName)
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resolvCtx, cancel := context.WithTimeout(req.Context(), time.Minute)
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defer cancel()
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var resolver net.Resolver
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for _, region := range derpMap.Regions {
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for _, node := range region.Nodes { // we don't care if we override some nodes
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addrs, err := resolver.LookupIP(resolvCtx, "ip", node.HostName)
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if err != nil {
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log.Trace().
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Caller().
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Err(err).
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Msgf("bootstrap DNS lookup failed %q", node.HostName)
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continue
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continue
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}
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dnsEntries[node.HostName] = addrs
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}
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dnsEntries[node.HostName] = addrs
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}
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}
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writer.Header().Set("Content-Type", "application/json")
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writer.WriteHeader(http.StatusOK)
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err := json.NewEncoder(writer).Encode(dnsEntries)
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if err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Failed to write response")
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writer.Header().Set("Content-Type", "application/json")
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writer.WriteHeader(http.StatusOK)
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err := json.NewEncoder(writer).Encode(dnsEntries)
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if err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Failed to write response")
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}
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}
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}
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// ServeSTUN starts a STUN server on the configured addr.
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func (h *Headscale) ServeSTUN() {
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packetConn, err := net.ListenPacket("udp", h.cfg.DERP.STUNAddr)
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func (d *DERPServer) ServeSTUN() {
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packetConn, err := net.ListenPacket("udp", d.cfg.STUNAddr)
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if err != nil {
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log.Fatal().Msgf("failed to open STUN listener: %v", err)
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}
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