mirror of
https://github.com/gravitational/teleport
synced 2024-10-21 17:53:28 +00:00
53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
/*
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Copyright 2015 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 srv
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import (
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"fmt"
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"strings"
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"github.com/gravitational/trace"
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"golang.org/x/crypto/ssh"
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)
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type subsys struct {
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Name string
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}
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// subsystem represents SSH subsytem - special command executed
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// in the context of the session
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type subsystem interface {
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// start starts subsystem
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start(*ssh.ServerConn, ssh.Channel, *ssh.Request, *ctx) error
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// wait is returned by subystem when it's completed
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wait() error
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}
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func parseSubsystemRequest(srv *Server, req *ssh.Request) (subsystem, error) {
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var s subsys
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if err := ssh.Unmarshal(req.Payload, &s); err != nil {
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return nil, fmt.Errorf("failed to parse subsystem request, error: %v", err)
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}
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if srv.proxyMode && strings.HasPrefix(s.Name, "proxy:") {
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return parseProxySubsys(s.Name, srv)
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}
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if srv.proxyMode && strings.HasPrefix(s.Name, "proxysites") {
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return parseProxySitesSubsys(s.Name, srv)
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}
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return nil, trace.BadParameter("unrecognized subsystem: %v", s.Name)
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}
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