mirror of
https://github.com/gravitational/teleport
synced 2024-10-21 17:53:28 +00:00
7a62b25921
Add IP addresses to host certificate.
198 lines
5.4 KiB
Go
198 lines
5.4 KiB
Go
/*
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Copyright 2017 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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"fmt"
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"net"
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"time"
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"github.com/gravitational/teleport"
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"github.com/gravitational/teleport/lib/auth"
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"github.com/gravitational/teleport/lib/defaults"
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"github.com/gravitational/teleport/lib/services"
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"github.com/gravitational/trace"
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log "github.com/sirupsen/logrus"
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)
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func newClusterPeers(clusterName string) *clusterPeers {
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return &clusterPeers{
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clusterName: clusterName,
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peers: make(map[string]*clusterPeer),
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}
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}
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// clusterPeers is a collection of cluster peers to a given cluster
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type clusterPeers struct {
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clusterName string
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peers map[string]*clusterPeer
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}
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func (p *clusterPeers) GetTunnelsCount() int {
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return len(p.peers)
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}
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func (p *clusterPeers) pickPeer() (*clusterPeer, error) {
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var currentPeer *clusterPeer
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for _, peer := range p.peers {
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if currentPeer == nil || peer.connInfo.GetLastHeartbeat().After(currentPeer.connInfo.GetLastHeartbeat()) {
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currentPeer = peer
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}
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}
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if currentPeer == nil {
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return nil, trace.NotFound("no active peers found for %v", p.clusterName)
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}
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return currentPeer, nil
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}
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func (p *clusterPeers) updatePeer(conn services.TunnelConnection) bool {
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peer, ok := p.peers[conn.GetName()]
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if !ok {
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return false
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}
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peer.connInfo = conn
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return true
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}
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func (p *clusterPeers) addPeer(peer *clusterPeer) {
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p.peers[peer.connInfo.GetName()] = peer
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}
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func (p *clusterPeers) removePeer(connInfo services.TunnelConnection) {
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delete(p.peers, connInfo.GetName())
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}
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func (p *clusterPeers) CachingAccessPoint() (auth.AccessPoint, error) {
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peer, err := p.pickPeer()
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if err != nil {
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return nil, trace.Wrap(err)
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}
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return peer.CachingAccessPoint()
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}
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func (p *clusterPeers) GetClient() (auth.ClientI, error) {
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peer, err := p.pickPeer()
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if err != nil {
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return nil, trace.Wrap(err)
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}
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return peer.GetClient()
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}
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func (p *clusterPeers) String() string {
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return fmt.Sprintf("clusterPeer(%v)", p.clusterName)
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}
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func (p *clusterPeers) GetStatus() string {
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peer, err := p.pickPeer()
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if err != nil {
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return teleport.RemoteClusterStatusOffline
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}
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return peer.GetStatus()
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}
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func (p *clusterPeers) GetName() string {
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return p.clusterName
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}
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func (p *clusterPeers) GetLastConnected() time.Time {
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peer, err := p.pickPeer()
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if err != nil {
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return time.Time{}
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}
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return peer.GetLastConnected()
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}
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func (p *clusterPeers) DialAuthServer() (net.Conn, error) {
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return nil, trace.ConnectionProblem(nil, "unable to dial to auth server, this proxy has not been discovered yet, try again later")
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}
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// Dial is used to connect a requesting client (say, tsh) to an SSH server
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// located in a remote connected site, the connection goes through the
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// reverse proxy tunnel.
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func (p *clusterPeers) Dial(params DialParams) (conn net.Conn, err error) {
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return p.DialTCP(params.From, params.To)
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}
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func (p *clusterPeers) DialTCP(from, to net.Addr) (conn net.Conn, err error) {
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return nil, trace.ConnectionProblem(nil, "unable to dial, this proxy has not been discovered yet, try again later")
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}
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// newClusterPeer returns new cluster peer
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func newClusterPeer(srv *server, connInfo services.TunnelConnection) (*clusterPeer, error) {
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clusterPeer := &clusterPeer{
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srv: srv,
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connInfo: connInfo,
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log: log.WithFields(log.Fields{
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trace.Component: teleport.ComponentReverseTunnelServer,
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trace.ComponentFields: map[string]string{
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"cluster": connInfo.GetClusterName(),
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},
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}),
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}
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return clusterPeer, nil
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}
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// clusterPeer is a remote cluster that has established
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// a tunnel to the peers
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type clusterPeer struct {
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log *log.Entry
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connInfo services.TunnelConnection
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srv *server
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}
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func (s *clusterPeer) CachingAccessPoint() (auth.AccessPoint, error) {
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return nil, trace.ConnectionProblem(nil, "unable to fetch access point, this proxy %v has not been discovered yet, try again later", s)
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}
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func (s *clusterPeer) GetClient() (auth.ClientI, error) {
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return nil, trace.ConnectionProblem(nil, "unable to fetch client, this proxy %v has not been discovered yet, try again later", s)
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}
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func (s *clusterPeer) String() string {
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return fmt.Sprintf("clusterPeer(%v)", s.connInfo)
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}
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func (s *clusterPeer) GetStatus() string {
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diff := time.Now().Sub(s.connInfo.GetLastHeartbeat())
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if diff > defaults.ReverseTunnelOfflineThreshold {
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return teleport.RemoteClusterStatusOffline
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}
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return teleport.RemoteClusterStatusOnline
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}
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func (s *clusterPeer) GetName() string {
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return s.connInfo.GetClusterName()
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}
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func (s *clusterPeer) GetLastConnected() time.Time {
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return s.connInfo.GetLastHeartbeat()
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}
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// Dial is used to connect a requesting client (say, tsh) to an SSH server
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// located in a remote connected site, the connection goes through the
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// reverse proxy tunnel.
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func (s *clusterPeer) Dial(params DialParams) (conn net.Conn, err error) {
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return nil, trace.ConnectionProblem(nil, "unable to dial, this proxy %v has not been discovered yet, try again later", s)
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}
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// Close closes cluster peer connections
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func (s *clusterPeer) Close() error {
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return nil
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}
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