mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-02 23:31:08 +08:00
David Boslee
32695a2f05
This adds proxy peering support. A configurable setting that allows for agents to connect to a subset of proxies and be reachable through any proxy in the cluster. This is achieved by creating grpc connections between each proxy server. Client connections can then be passed between proxies to the desired agent.
119 lines
3.2 KiB
Go
119 lines
3.2 KiB
Go
// Copyright 2022 Gravitational, Inc
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package proxy
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import (
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"net"
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"strings"
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"github.com/gravitational/teleport/api/client/proto"
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"github.com/gravitational/teleport/api/types"
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"github.com/gravitational/teleport/lib/utils"
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"github.com/gravitational/trace"
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"github.com/sirupsen/logrus"
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)
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// proxyService implements the grpc ProxyService.
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type proxyService struct {
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clusterDialer ClusterDialer
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log logrus.FieldLogger
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}
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// DialNode opens a bidirectional stream to the requested node.
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func (s *proxyService) DialNode(stream proto.ProxyService_DialNodeServer) error {
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frame, err := stream.Recv()
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if err != nil {
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return trace.Wrap(err)
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}
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// The first frame is always expected to be a dial request.
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dial := frame.GetDialRequest()
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if dial == nil {
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return trace.BadParameter("invalid dial request: request must not be nil")
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}
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if dial.Source == nil || dial.Destination == nil {
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return trace.BadParameter("invalid dial request: source and destinatation must not be nil")
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}
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log := s.log.WithFields(logrus.Fields{
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"node": dial.NodeID,
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"src": dial.Source.Addr,
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"dst": dial.Destination.Addr,
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})
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log.Debugf("Dial request from peer.")
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_, clusterName, err := splitServerID(dial.NodeID)
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if err != nil {
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return trace.Wrap(err)
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}
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source := &utils.NetAddr{
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Addr: dial.Source.Addr,
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AddrNetwork: dial.Source.Network,
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}
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destination := &utils.NetAddr{
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Addr: dial.Destination.Addr,
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AddrNetwork: dial.Destination.Network,
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}
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nodeConn, err := s.clusterDialer.Dial(clusterName, DialParams{
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From: source,
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To: destination,
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ServerID: dial.NodeID,
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ConnType: dial.TunnelType,
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})
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if err != nil {
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return trace.Wrap(err)
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}
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err = stream.Send(&proto.Frame{
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Message: &proto.Frame_ConnectionEstablished{
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ConnectionEstablished: &proto.ConnectionEstablished{},
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},
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})
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if err != nil {
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return trace.Wrap(err)
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}
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streamConn := newStreamConn(stream, source, destination)
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sent, received, err := pipeConn(stream.Context(), streamConn, nodeConn)
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log.Debugf("Closing dial request from peer. sent: %d reveived %d", sent, received)
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return trace.Wrap(err)
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}
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// splitServerID splits a server id in to a node id and cluster name.
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func splitServerID(address string) (string, string, error) {
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split := strings.Split(address, ".")
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if len(split) == 0 || split[0] == "" {
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return "", "", trace.BadParameter("invalid server id: \"%s\"", address)
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}
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return split[0], strings.Join(split[1:], "."), nil
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}
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// ClusterDialer dials a node in the given cluster.
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type ClusterDialer interface {
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Dial(clusterName string, request DialParams) (net.Conn, error)
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}
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type DialParams struct {
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From *utils.NetAddr
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To *utils.NetAddr
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ServerID string
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ConnType types.TunnelType
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}
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