mirror of
https://github.com/gravitational/teleport.git
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101 lines
2.9 KiB
Go
101 lines
2.9 KiB
Go
/*
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Copyright 2016-2019 Gravitational, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package reversetunnel
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import (
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"encoding/json"
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"fmt"
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"strings"
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"github.com/gravitational/teleport/api/types"
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"github.com/gravitational/teleport/lib/services"
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"github.com/gravitational/teleport/lib/utils"
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"github.com/gravitational/trace"
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)
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// discoveryRequest is a request sent from a connected proxy with the missing proxies.
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type discoveryRequest struct {
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// ClusterName is the name of the cluster that sends the discovery request.
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ClusterName string `json:"cluster_name"`
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// Type is the type of tunnel, is either node or proxy.
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Type string `json:"type"`
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// ClusterAddr is the address of the cluster.
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ClusterAddr utils.NetAddr `json:"-"`
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// Proxies is a list of proxies in the cluster sending the discovery request.
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Proxies []types.Server `json:"proxies"`
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}
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func (r discoveryRequest) String() string {
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proxyNames := make([]string, 0, len(r.Proxies))
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for _, p := range r.Proxies {
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proxyNames = append(proxyNames, p.GetName())
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}
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return fmt.Sprintf("discovery request, cluster name: %v, address: %v, proxies: %v",
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r.ClusterName, r.ClusterAddr, strings.Join(proxyNames, ","))
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}
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type discoveryRequestRaw struct {
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ClusterName string `json:"cluster_name"`
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Type string `json:"type"`
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Proxies []json.RawMessage `json:"proxies"`
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}
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func marshalDiscoveryRequest(req discoveryRequest) ([]byte, error) {
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var out discoveryRequestRaw
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for _, p := range req.Proxies {
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// Clone the server value to avoid a potential race
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// since the proxies are shared.
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// Marshaling attempts to enforce defaults which modifies
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// the original value.
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p = p.DeepCopy()
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data, err := services.MarshalServer(p)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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out.Proxies = append(out.Proxies, data)
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}
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out.ClusterName = req.ClusterName
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out.Type = req.Type
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return json.Marshal(out)
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}
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func unmarshalDiscoveryRequest(data []byte) (*discoveryRequest, error) {
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if len(data) == 0 {
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return nil, trace.BadParameter("missing payload in discovery request")
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}
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var raw discoveryRequestRaw
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err := utils.FastUnmarshal(data, &raw)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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var out discoveryRequest
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for _, bytes := range raw.Proxies {
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proxy, err := services.UnmarshalServer([]byte(bytes), types.KindProxy)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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out.Proxies = append(out.Proxies, proxy)
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}
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out.ClusterName = raw.ClusterName
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out.Type = raw.Type
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return &out, nil
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}
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