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https://github.com/juanfont/headscale.git
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Working on common codebase for poll, starting with legacy
This commit is contained in:
Juan Font Alonso
parent
f4bab6b290
commit
df8ecdb603
@ -2,17 +2,12 @@ package headscale
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"net/http"
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"time"
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"github.com/gorilla/mux"
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"github.com/rs/zerolog/log"
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"gorm.io/gorm"
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"tailscale.com/tailcfg"
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"tailscale.com/types/key"
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)
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const (
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@ -23,83 +18,13 @@ type contextKey string
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const machineNameContextKey = contextKey("machineName")
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// PollNetMapHandler takes care of /machine/:id/map
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//
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// This is the busiest endpoint, as it keeps the HTTP long poll that updates
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// the clients when something in the network changes.
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//
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// The clients POST stuff like HostInfo and their Endpoints here, but
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// only after their first request (marked with the ReadOnly field).
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//
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// At this moment the updates are sent in a quite horrendous way, but they kinda work.
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func (h *Headscale) PollNetMapHandler(
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func (h *Headscale) handlePollCommon(
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writer http.ResponseWriter,
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req *http.Request,
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machine *Machine,
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mapRequest tailcfg.MapRequest,
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isNoise bool,
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) {
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vars := mux.Vars(req)
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machineKeyStr, ok := vars["mkey"]
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if !ok || machineKeyStr == "" {
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log.Error().
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Str("handler", "PollNetMap").
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Msg("No machine key in request")
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http.Error(writer, "No machine key in request", http.StatusBadRequest)
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return
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}
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log.Trace().
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Str("handler", "PollNetMap").
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Str("id", machineKeyStr).
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Msg("PollNetMapHandler called")
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body, _ := io.ReadAll(req.Body)
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var machineKey key.MachinePublic
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err := machineKey.UnmarshalText([]byte(MachinePublicKeyEnsurePrefix(machineKeyStr)))
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if err != nil {
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log.Error().
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Str("handler", "PollNetMap").
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Err(err).
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Msg("Cannot parse client key")
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http.Error(writer, "Cannot parse client key", http.StatusBadRequest)
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return
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}
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mapRequest := tailcfg.MapRequest{}
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err = decode(body, &mapRequest, &machineKey, h.privateKey)
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if err != nil {
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log.Error().
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Str("handler", "PollNetMap").
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Err(err).
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Msg("Cannot decode message")
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http.Error(writer, "Cannot decode message", http.StatusBadRequest)
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return
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}
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machine, err := h.GetMachineByMachineKey(machineKey)
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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log.Warn().
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Str("handler", "PollNetMap").
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Msgf("Ignoring request, cannot find machine with key %s", machineKey.String())
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http.Error(writer, "", http.StatusUnauthorized)
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return
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}
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log.Error().
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Str("handler", "PollNetMap").
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Msgf("Failed to fetch machine from the database with Machine key: %s", machineKey.String())
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http.Error(writer, "", http.StatusInternalServerError)
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return
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}
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log.Trace().
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Str("handler", "PollNetMap").
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Str("id", machineKeyStr).
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Str("machine", machine.Hostname).
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Msg("Found machine in database")
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machine.Hostname = mapRequest.Hostinfo.Hostname
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machine.HostInfo = HostInfo(*mapRequest.Hostinfo)
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machine.DiscoKey = DiscoPublicKeyStripPrefix(mapRequest.DiscoKey)
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@ -107,7 +32,7 @@ func (h *Headscale) PollNetMapHandler(
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// update ACLRules with peer informations (to update server tags if necessary)
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if h.aclPolicy != nil {
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err = h.UpdateACLRules()
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err := h.UpdateACLRules()
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if err != nil {
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log.Error().
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Caller().
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@ -133,7 +58,7 @@ func (h *Headscale) PollNetMapHandler(
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if err != nil {
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log.Error().
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Str("handler", "PollNetMap").
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Str("id", machineKeyStr).
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Str("node_key", machine.NodeKey).
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Str("machine", machine.Hostname).
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Err(err).
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Msg("Failed to persist/update machine in the database")
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@ -143,11 +68,11 @@ func (h *Headscale) PollNetMapHandler(
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}
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}
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data, err := h.getLegacyMapResponseData(machineKey, mapRequest, machine)
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mapResp, err := h.getMapResponseData(mapRequest, machine, isNoise)
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if err != nil {
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log.Error().
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Str("handler", "PollNetMap").
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Str("id", machineKeyStr).
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Str("node_key", machine.NodeKey).
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Str("machine", machine.Hostname).
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Err(err).
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Msg("Failed to get Map response")
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@ -163,7 +88,6 @@ func (h *Headscale) PollNetMapHandler(
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// Details on the protocol can be found in https://github.com/tailscale/tailscale/blob/main/tailcfg/tailcfg.go#L696
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log.Debug().
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Str("handler", "PollNetMap").
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Str("id", machineKeyStr).
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Str("machine", machine.Hostname).
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Bool("readOnly", mapRequest.ReadOnly).
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Bool("omitPeers", mapRequest.OmitPeers).
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@ -178,7 +102,7 @@ func (h *Headscale) PollNetMapHandler(
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writer.Header().Set("Content-Type", "application/json; charset=utf-8")
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writer.WriteHeader(http.StatusOK)
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_, err := writer.Write(data)
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_, err := writer.Write(mapResp)
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if err != nil {
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log.Error().
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Caller().
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@ -186,6 +110,10 @@ func (h *Headscale) PollNetMapHandler(
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Msg("Failed to write response")
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}
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if f, ok := writer.(http.Flusher); ok {
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f.Flush()
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}
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return
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}
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@ -198,8 +126,7 @@ func (h *Headscale) PollNetMapHandler(
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// Only create update channel if it has not been created
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log.Trace().
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Str("handler", "PollNetMap").
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Str("id", machineKeyStr).
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Caller().
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Str("machine", machine.Hostname).
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Msg("Loading or creating update channel")
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@ -218,7 +145,7 @@ func (h *Headscale) PollNetMapHandler(
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Msg("Client sent endpoint update and is ok with a response without peer list")
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writer.Header().Set("Content-Type", "application/json; charset=utf-8")
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writer.WriteHeader(http.StatusOK)
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_, err := writer.Write(data)
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_, err := writer.Write(mapResp)
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if err != nil {
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log.Error().
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Caller().
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@ -250,7 +177,7 @@ func (h *Headscale) PollNetMapHandler(
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Str("handler", "PollNetMap").
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Str("machine", machine.Hostname).
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Msg("Sending initial map")
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pollDataChan <- data
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pollDataChan <- mapResp
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log.Info().
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Str("handler", "PollNetMap").
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@ -260,35 +187,34 @@ func (h *Headscale) PollNetMapHandler(
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Inc()
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updateChan <- struct{}{}
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h.PollNetMapStream(
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h.pollNetMapStream(
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writer,
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req,
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machine,
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mapRequest,
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machineKey,
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pollDataChan,
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keepAliveChan,
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updateChan,
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isNoise,
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)
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log.Trace().
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Str("handler", "PollNetMap").
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Str("id", machineKeyStr).
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Str("machine", machine.Hostname).
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Msg("Finished stream, closing PollNetMap session")
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}
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// PollNetMapStream takes care of /machine/:id/map
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// stream logic, ensuring we communicate updates and data
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// to the connected clients.
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func (h *Headscale) PollNetMapStream(
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// pollNetMapStream stream logic for /machine/map,
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// ensuring we communicate updates and data to the connected clients.
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func (h *Headscale) pollNetMapStream(
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writer http.ResponseWriter,
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req *http.Request,
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machine *Machine,
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mapRequest tailcfg.MapRequest,
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machineKey key.MachinePublic,
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pollDataChan chan []byte,
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keepAliveChan chan []byte,
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updateChan chan struct{},
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isNoise bool,
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) {
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h.pollNetMapStreamWG.Add(1)
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defer h.pollNetMapStreamWG.Done()
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@ -302,9 +228,9 @@ func (h *Headscale) PollNetMapStream(
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ctx,
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updateChan,
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keepAliveChan,
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machineKey,
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mapRequest,
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machine,
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isNoise,
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)
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log.Trace().
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@ -491,7 +417,7 @@ func (h *Headscale) PollNetMapStream(
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Time("last_successful_update", lastUpdate).
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Time("last_state_change", h.getLastStateChange(machine.Namespace.Name)).
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Msgf("There has been updates since the last successful update to %s", machine.Hostname)
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data, err := h.getLegacyMapResponseData(machineKey, mapRequest, machine)
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data, err := h.getMapResponseData(mapRequest, machine, false)
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if err != nil {
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log.Error().
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Str("handler", "PollNetMapStream").
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@ -637,9 +563,9 @@ func (h *Headscale) scheduledPollWorker(
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ctx context.Context,
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updateChan chan struct{},
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keepAliveChan chan []byte,
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machineKey key.MachinePublic,
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mapRequest tailcfg.MapRequest,
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machine *Machine,
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isNoise bool,
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) {
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keepAliveTicker := time.NewTicker(keepAliveInterval)
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updateCheckerTicker := time.NewTicker(h.cfg.NodeUpdateCheckInterval)
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@ -661,7 +587,7 @@ func (h *Headscale) scheduledPollWorker(
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return
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case <-keepAliveTicker.C:
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data, err := h.getMapKeepAliveResponse(machineKey, mapRequest)
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data, err := h.getMapKeepAliveResponseData(mapRequest, machine, isNoise)
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if err != nil {
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log.Error().
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Str("func", "keepAlive").
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94
protocol_legacy_poll.go
Normal file
94
protocol_legacy_poll.go
Normal file
@ -0,0 +1,94 @@
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package headscale
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import (
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"errors"
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"io"
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"net/http"
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"github.com/gorilla/mux"
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"github.com/rs/zerolog/log"
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"gorm.io/gorm"
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"tailscale.com/tailcfg"
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"tailscale.com/types/key"
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)
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// PollNetMapHandler takes care of /machine/:id/map
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//
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// This is the busiest endpoint, as it keeps the HTTP long poll that updates
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// the clients when something in the network changes.
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//
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// The clients POST stuff like HostInfo and their Endpoints here, but
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// only after their first request (marked with the ReadOnly field).
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//
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// At this moment the updates are sent in a quite horrendous way, but they kinda work.
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func (h *Headscale) PollNetMapHandler(
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writer http.ResponseWriter,
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req *http.Request,
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) {
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vars := mux.Vars(req)
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machineKeyStr, ok := vars["mkey"]
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if !ok || machineKeyStr == "" {
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log.Error().
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Str("handler", "PollNetMap").
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Msg("No machine key in request")
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http.Error(writer, "No machine key in request", http.StatusBadRequest)
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return
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}
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log.Trace().
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Str("handler", "PollNetMap").
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Str("id", machineKeyStr).
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Msg("PollNetMapHandler called")
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body, _ := io.ReadAll(req.Body)
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var machineKey key.MachinePublic
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err := machineKey.UnmarshalText([]byte(MachinePublicKeyEnsurePrefix(machineKeyStr)))
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if err != nil {
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log.Error().
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Str("handler", "PollNetMap").
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Err(err).
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Msg("Cannot parse client key")
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http.Error(writer, "Cannot parse client key", http.StatusBadRequest)
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return
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}
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mapRequest := tailcfg.MapRequest{}
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err = decode(body, &mapRequest, &machineKey, h.privateKey)
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if err != nil {
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log.Error().
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Str("handler", "PollNetMap").
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Err(err).
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Msg("Cannot decode message")
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http.Error(writer, "Cannot decode message", http.StatusBadRequest)
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return
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}
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machine, err := h.GetMachineByMachineKey(machineKey)
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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log.Warn().
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Str("handler", "PollNetMap").
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Msgf("Ignoring request, cannot find machine with key %s", machineKey.String())
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http.Error(writer, "", http.StatusUnauthorized)
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return
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}
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log.Error().
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Str("handler", "PollNetMap").
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Msgf("Failed to fetch machine from the database with Machine key: %s", machineKey.String())
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http.Error(writer, "", http.StatusInternalServerError)
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return
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}
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log.Trace().
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Str("handler", "PollNetMap").
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Str("id", machineKeyStr).
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Str("machine", machine.Hostname).
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Msg("Found machine in database")
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h.handlePollCommon(writer, req, machine, mapRequest, false)
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}
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