mirror of
https://github.com/drakkan/sftpgo.git
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86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
// Copyright (C) 2019-2022 Nicola Murino
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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
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// by the Free Software Foundation, version 3.
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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 <https://www.gnu.org/licenses/>.
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package sftpd
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import (
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"io"
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"net"
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"github.com/pkg/sftp"
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"github.com/drakkan/sftpgo/v2/common"
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"github.com/drakkan/sftpgo/v2/dataprovider"
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"github.com/drakkan/sftpgo/v2/logger"
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)
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type subsystemChannel struct {
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reader io.Reader
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writer io.Writer
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}
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func (s *subsystemChannel) Read(p []byte) (int, error) {
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return s.reader.Read(p)
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}
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func (s *subsystemChannel) Write(p []byte) (int, error) {
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return s.writer.Write(p)
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}
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func (s *subsystemChannel) Close() error {
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return nil
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}
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func newSubsystemChannel(reader io.Reader, writer io.Writer) *subsystemChannel {
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return &subsystemChannel{
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reader: reader,
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writer: writer,
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}
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}
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// ServeSubSystemConnection handles a connection as SSH subsystem
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func ServeSubSystemConnection(user *dataprovider.User, connectionID string, reader io.Reader, writer io.Writer) error {
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err := user.CheckFsRoot(connectionID)
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if err != nil {
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errClose := user.CloseFs()
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logger.Warn(logSender, connectionID, "unable to check fs root: %v close fs error: %v", err, errClose)
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return err
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}
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connection := &Connection{
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BaseConnection: common.NewBaseConnection(connectionID, common.ProtocolSFTP, "", "", *user),
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ClientVersion: "",
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RemoteAddr: &net.IPAddr{},
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LocalAddr: &net.IPAddr{},
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channel: newSubsystemChannel(reader, writer),
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}
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err = common.Connections.Add(connection)
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if err != nil {
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errClose := user.CloseFs()
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logger.Warn(logSender, connectionID, "unable to add connection: %v close fs error: %v", err, errClose)
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return err
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}
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defer common.Connections.Remove(connection.GetID())
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dataprovider.UpdateLastLogin(user)
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server := sftp.NewRequestServer(connection.channel, sftp.Handlers{
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FileGet: connection,
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FilePut: connection,
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FileCmd: connection,
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FileList: connection,
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}, sftp.WithRSAllocator())
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defer server.Close()
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return server.Serve()
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}
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