101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
//go:build !plan9
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// +build !plan9
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package sftp
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import (
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"context"
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"io"
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"net"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fs/fshttp"
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"github.com/rclone/rclone/lib/proxy"
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"golang.org/x/crypto/ssh"
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)
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// Internal ssh connections with "golang.org/x/crypto/ssh"
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type sshClientInternal struct {
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srv *ssh.Client
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}
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// newSSHClientInternal starts a client connection to the given SSH server. It is a
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// convenience function that connects to the given network address,
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// initiates the SSH handshake, and then sets up a Client.
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func (f *Fs) newSSHClientInternal(ctx context.Context, network, addr string, sshConfig *ssh.ClientConfig) (sshClient, error) {
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baseDialer := fshttp.NewDialer(ctx)
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var (
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conn net.Conn
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err error
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)
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if f.opt.SocksProxy != "" {
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conn, err = proxy.SOCKS5Dial(network, addr, f.opt.SocksProxy, baseDialer)
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} else {
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conn, err = baseDialer.Dial(network, addr)
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}
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if err != nil {
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return nil, err
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}
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c, chans, reqs, err := ssh.NewClientConn(conn, addr, sshConfig)
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if err != nil {
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return nil, err
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}
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fs.Debugf(f, "New connection %s->%s to %q", c.LocalAddr(), c.RemoteAddr(), c.ServerVersion())
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srv := ssh.NewClient(c, chans, reqs)
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return sshClientInternal{srv}, nil
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}
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// Wait for connection to close
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func (s sshClientInternal) Wait() error {
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return s.srv.Conn.Wait()
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}
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// Send a keepalive over the ssh connection
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func (s sshClientInternal) SendKeepAlive() {
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_, _, err := s.srv.SendRequest("keepalive@openssh.com", true, nil)
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if err != nil {
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fs.Debugf(nil, "Failed to send keep alive: %v", err)
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}
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}
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// Close the connection
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func (s sshClientInternal) Close() error {
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return s.srv.Close()
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}
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// CanReuse indicates if this client can be reused
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func (s sshClientInternal) CanReuse() bool {
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return true
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}
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// Check interfaces
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var _ sshClient = sshClientInternal{}
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// Thin wrapper for *ssh.Session to implement sshSession interface
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type sshSessionInternal struct {
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*ssh.Session
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}
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// Set the stdout
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func (s sshSessionInternal) SetStdout(wr io.Writer) {
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s.Session.Stdout = wr
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}
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// Set the stderr
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func (s sshSessionInternal) SetStderr(wr io.Writer) {
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s.Session.Stderr = wr
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}
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// NewSession makes an sshSession from an sshClient
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func (s sshClientInternal) NewSession() (sshSession, error) {
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session, err := s.srv.NewSession()
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if err != nil {
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return nil, err
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}
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return sshSessionInternal{Session: session}, nil
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}
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// Check interfaces
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var _ sshSession = sshSessionInternal{}
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