97 lines
2.4 KiB
Go
97 lines
2.4 KiB
Go
package hscontrol
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import (
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"encoding/json"
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"errors"
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"io"
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"net/http"
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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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MinimumCapVersion tailcfg.CapabilityVersion = 36
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)
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// NoisePollNetMapHandler takes care of /machine/:id/map using the Noise protocol
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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 (ns *noiseServer) NoisePollNetMapHandler(
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writer http.ResponseWriter,
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req *http.Request,
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) {
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log.Trace().
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Str("handler", "NoisePollNetMap").
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Msg("PollNetMapHandler called")
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log.Trace().
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Any("headers", req.Header).
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Caller().
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Msg("Headers")
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body, _ := io.ReadAll(req.Body)
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mapRequest := tailcfg.MapRequest{}
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if err := json.Unmarshal(body, &mapRequest); err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Cannot parse MapRequest")
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http.Error(writer, "Internal error", http.StatusInternalServerError)
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return
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}
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// Reject unsupported versions
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if mapRequest.Version < MinimumCapVersion {
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log.Info().
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Caller().
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Int("min_version", int(MinimumCapVersion)).
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Int("client_version", int(mapRequest.Version)).
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Msg("unsupported client connected")
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http.Error(writer, "Internal error", http.StatusBadRequest)
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return
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}
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ns.nodeKey = mapRequest.NodeKey
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node, err := ns.headscale.db.GetNodeByAnyKey(
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ns.conn.Peer(),
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mapRequest.NodeKey,
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key.NodePublic{},
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)
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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", "NoisePollNetMap").
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Msgf("Ignoring request, cannot find node with key %s", mapRequest.NodeKey.String())
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http.Error(writer, "Internal error", http.StatusNotFound)
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return
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}
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log.Error().
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Str("handler", "NoisePollNetMap").
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Msgf("Failed to fetch node from the database with node key: %s", mapRequest.NodeKey.String())
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http.Error(writer, "Internal error", http.StatusInternalServerError)
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return
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}
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log.Debug().
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Str("handler", "NoisePollNetMap").
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Str("node", node.Hostname).
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Int("cap_ver", int(mapRequest.Version)).
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Msg("A node sending a MapRequest with Noise protocol")
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ns.headscale.handlePoll(writer, req.Context(), node, mapRequest)
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}
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