mirror of
https://github.com/gravitational/teleport.git
synced 2026-09-21 14:35:22 +08:00
rosstimothy
b7318b5c7e
Adds the new linter and configures it to prevent direct error comparisions and type assertions in favor of errors.Is and errors.As. All current violations caught by the linter have been updated accordingly.
73 lines
2.1 KiB
Go
73 lines
2.1 KiB
Go
/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package sshutils
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import (
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"context"
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"errors"
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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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// RequestForwarder represents a resource capable of sending
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// an ssh request such as an ssh.Channel or ssh.Session.
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type RequestForwarder interface {
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SendRequest(ctx context.Context, name string, wantReply bool, payload []byte) (bool, error)
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}
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// ForwardRequest is a helper for forwarding a request across a session or channel.
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func ForwardRequest(ctx context.Context, sender RequestForwarder, req *ssh.Request) (bool, error) {
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reply, err := sender.SendRequest(ctx, req.Type, req.WantReply, req.Payload)
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if err != nil || !req.WantReply {
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return reply, trace.Wrap(err)
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}
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return reply, trace.Wrap(req.Reply(reply, nil))
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}
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// ForwardRequests forwards all ssh requests received from the
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// given channel until the channel or context is closed.
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func ForwardRequests(ctx context.Context, sin <-chan *ssh.Request, sender RequestForwarder) error {
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for {
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select {
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case sreq, ok := <-sin:
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if !ok {
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// channel closed, stop processing
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return nil
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}
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switch sreq.Type {
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case WindowChangeRequest:
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if _, err := ForwardRequest(ctx, sender, sreq); err != nil {
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return trace.Wrap(err)
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}
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default:
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if sreq.WantReply {
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sreq.Reply(false, nil)
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}
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continue
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}
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case <-ctx.Done():
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if !errors.Is(ctx.Err(), context.Canceled) {
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return trace.Wrap(ctx.Err())
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}
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return nil
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}
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}
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}
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