696 lines
20 KiB
Go
696 lines
20 KiB
Go
// Copyright (C) 2014 The Syncthing Authors.
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//
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// This program is free software: you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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// more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program. If not, see <http://www.gnu.org/licenses/>.
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// Package config implements reading and writing of the syncthing configuration file.
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package config
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import (
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"encoding/xml"
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"fmt"
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"io"
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"math/rand"
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"os"
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"path/filepath"
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"reflect"
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"sort"
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"strconv"
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"github.com/calmh/logger"
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"github.com/syncthing/protocol"
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"github.com/syncthing/syncthing/internal/osutil"
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"golang.org/x/crypto/bcrypt"
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)
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var l = logger.DefaultLogger
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const CurrentVersion = 7
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type Configuration struct {
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Version int `xml:"version,attr"`
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Folders []FolderConfiguration `xml:"folder"`
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Devices []DeviceConfiguration `xml:"device"`
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GUI GUIConfiguration `xml:"gui"`
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Options OptionsConfiguration `xml:"options"`
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IgnoredDevices []protocol.DeviceID `xml:"ignoredDevice"`
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XMLName xml.Name `xml:"configuration" json:"-"`
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OriginalVersion int `xml:"-" json:"-"` // The version we read from disk, before any conversion
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Deprecated_Repositories []FolderConfiguration `xml:"repository" json:"-"`
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Deprecated_Nodes []DeviceConfiguration `xml:"node" json:"-"`
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}
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type FolderConfiguration struct {
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ID string `xml:"id,attr"`
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Path string `xml:"path,attr"`
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Devices []FolderDeviceConfiguration `xml:"device"`
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ReadOnly bool `xml:"ro,attr"`
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RescanIntervalS int `xml:"rescanIntervalS,attr" default:"60"`
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IgnorePerms bool `xml:"ignorePerms,attr"`
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Versioning VersioningConfiguration `xml:"versioning"`
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LenientMtimes bool `xml:"lenientMtimes"`
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Copiers int `xml:"copiers" default:"1"` // This defines how many files are handled concurrently.
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Pullers int `xml:"pullers" default:"16"` // Defines how many blocks are fetched at the same time, possibly between separate copier routines.
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Hashers int `xml:"hashers" default:"0"` // Less than one sets the value to the number of cores. These are CPU bound due to hashing.
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Invalid string `xml:"-"` // Set at runtime when there is an error, not saved
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deviceIDs []protocol.DeviceID
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Deprecated_Directory string `xml:"directory,omitempty,attr" json:"-"`
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Deprecated_Nodes []FolderDeviceConfiguration `xml:"node" json:"-"`
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}
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func (f *FolderConfiguration) CreateMarker() error {
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if !f.HasMarker() {
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marker := filepath.Join(f.Path, ".stfolder")
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fd, err := os.Create(marker)
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if err != nil {
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return err
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}
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fd.Close()
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osutil.HideFile(marker)
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}
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return nil
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}
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func (f *FolderConfiguration) HasMarker() bool {
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_, err := os.Stat(filepath.Join(f.Path, ".stfolder"))
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if err != nil {
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return false
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}
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return true
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}
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func (f *FolderConfiguration) DeviceIDs() []protocol.DeviceID {
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if f.deviceIDs == nil {
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for _, n := range f.Devices {
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f.deviceIDs = append(f.deviceIDs, n.DeviceID)
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}
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}
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return f.deviceIDs
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}
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type VersioningConfiguration struct {
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Type string `xml:"type,attr"`
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Params map[string]string
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}
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type InternalVersioningConfiguration struct {
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Type string `xml:"type,attr,omitempty"`
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Params []InternalParam `xml:"param"`
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}
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type InternalParam struct {
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Key string `xml:"key,attr"`
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Val string `xml:"val,attr"`
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}
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func (c *VersioningConfiguration) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
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var tmp InternalVersioningConfiguration
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tmp.Type = c.Type
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for k, v := range c.Params {
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tmp.Params = append(tmp.Params, InternalParam{k, v})
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}
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return e.EncodeElement(tmp, start)
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}
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func (c *VersioningConfiguration) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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var tmp InternalVersioningConfiguration
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err := d.DecodeElement(&tmp, &start)
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if err != nil {
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return err
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}
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c.Type = tmp.Type
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c.Params = make(map[string]string, len(tmp.Params))
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for _, p := range tmp.Params {
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c.Params[p.Key] = p.Val
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}
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return nil
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}
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type DeviceConfiguration struct {
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DeviceID protocol.DeviceID `xml:"id,attr"`
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Name string `xml:"name,attr,omitempty"`
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Addresses []string `xml:"address,omitempty"`
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Compression bool `xml:"compression,attr"`
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CertName string `xml:"certName,attr,omitempty"`
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Introducer bool `xml:"introducer,attr"`
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}
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type FolderDeviceConfiguration struct {
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DeviceID protocol.DeviceID `xml:"id,attr"`
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Deprecated_Name string `xml:"name,attr,omitempty" json:"-"`
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Deprecated_Addresses []string `xml:"address,omitempty" json:"-"`
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}
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type OptionsConfiguration struct {
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ListenAddress []string `xml:"listenAddress" default:"0.0.0.0:22000"`
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GlobalAnnServers []string `xml:"globalAnnounceServer" default:"udp4://announce.syncthing.net:22026"`
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GlobalAnnEnabled bool `xml:"globalAnnounceEnabled" default:"true"`
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LocalAnnEnabled bool `xml:"localAnnounceEnabled" default:"true"`
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LocalAnnPort int `xml:"localAnnouncePort" default:"21025"`
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LocalAnnMCAddr string `xml:"localAnnounceMCAddr" default:"[ff32::5222]:21026"`
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MaxSendKbps int `xml:"maxSendKbps"`
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MaxRecvKbps int `xml:"maxRecvKbps"`
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ReconnectIntervalS int `xml:"reconnectionIntervalS" default:"60"`
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StartBrowser bool `xml:"startBrowser" default:"true"`
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UPnPEnabled bool `xml:"upnpEnabled" default:"true"`
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UPnPLease int `xml:"upnpLeaseMinutes" default:"0"`
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UPnPRenewal int `xml:"upnpRenewalMinutes" default:"30"`
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URAccepted int `xml:"urAccepted"` // Accepted usage reporting version; 0 for off (undecided), -1 for off (permanently)
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URUniqueID string `xml:"urUniqueID"` // Unique ID for reporting purposes, regenerated when UR is turned on.
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RestartOnWakeup bool `xml:"restartOnWakeup" default:"true"`
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AutoUpgradeIntervalH int `xml:"autoUpgradeIntervalH" default:"12"` // 0 for off
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KeepTemporariesH int `xml:"keepTemporariesH" default:"24"` // 0 for off
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CacheIgnoredFiles bool `xml:"cacheIgnoredFiles" default:"true"`
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ProgressUpdateIntervalS int `xml:"progressUpdateIntervalS" default:"5"`
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SymlinksEnabled bool `xml:"symlinksEnabled" default:"true"`
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Deprecated_RescanIntervalS int `xml:"rescanIntervalS,omitempty" json:"-"`
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Deprecated_UREnabled bool `xml:"urEnabled,omitempty" json:"-"`
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Deprecated_URDeclined bool `xml:"urDeclined,omitempty" json:"-"`
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Deprecated_ReadOnly bool `xml:"readOnly,omitempty" json:"-"`
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Deprecated_GUIEnabled bool `xml:"guiEnabled,omitempty" json:"-"`
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Deprecated_GUIAddress string `xml:"guiAddress,omitempty" json:"-"`
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}
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type GUIConfiguration struct {
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Enabled bool `xml:"enabled,attr" default:"true"`
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Address string `xml:"address" default:"127.0.0.1:8080"`
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User string `xml:"user,omitempty"`
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Password string `xml:"password,omitempty"`
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UseTLS bool `xml:"tls,attr"`
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APIKey string `xml:"apikey,omitempty"`
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}
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func New(myID protocol.DeviceID) Configuration {
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var cfg Configuration
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cfg.Version = CurrentVersion
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cfg.OriginalVersion = CurrentVersion
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setDefaults(&cfg)
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setDefaults(&cfg.Options)
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setDefaults(&cfg.GUI)
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cfg.prepare(myID)
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return cfg
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}
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func ReadXML(r io.Reader, myID protocol.DeviceID) (Configuration, error) {
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var cfg Configuration
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setDefaults(&cfg)
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setDefaults(&cfg.Options)
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setDefaults(&cfg.GUI)
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err := xml.NewDecoder(r).Decode(&cfg)
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cfg.OriginalVersion = cfg.Version
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cfg.prepare(myID)
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return cfg, err
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}
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func (cfg *Configuration) WriteXML(w io.Writer) error {
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e := xml.NewEncoder(w)
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e.Indent("", " ")
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err := e.Encode(cfg)
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if err != nil {
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return err
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}
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_, err = w.Write([]byte("\n"))
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return err
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}
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func (cfg *Configuration) prepare(myID protocol.DeviceID) {
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fillNilSlices(&cfg.Options)
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// Initialize an empty slices
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if cfg.Folders == nil {
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cfg.Folders = []FolderConfiguration{}
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}
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if cfg.IgnoredDevices == nil {
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cfg.IgnoredDevices = []protocol.DeviceID{}
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}
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// Check for missing, bad or duplicate folder ID:s
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var seenFolders = map[string]*FolderConfiguration{}
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var uniqueCounter int
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for i := range cfg.Folders {
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folder := &cfg.Folders[i]
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if len(folder.Path) == 0 {
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folder.Invalid = "no directory configured"
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continue
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}
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if folder.ID == "" {
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folder.ID = "default"
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}
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if seen, ok := seenFolders[folder.ID]; ok {
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l.Warnf("Multiple folders with ID %q; disabling", folder.ID)
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seen.Invalid = "duplicate folder ID"
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if seen.ID == folder.ID {
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uniqueCounter++
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seen.ID = fmt.Sprintf("%s~%d", folder.ID, uniqueCounter)
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}
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folder.Invalid = "duplicate folder ID"
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uniqueCounter++
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folder.ID = fmt.Sprintf("%s~%d", folder.ID, uniqueCounter)
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} else {
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seenFolders[folder.ID] = folder
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}
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}
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if cfg.Options.Deprecated_URDeclined {
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cfg.Options.URAccepted = -1
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cfg.Options.URUniqueID = ""
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}
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cfg.Options.Deprecated_URDeclined = false
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cfg.Options.Deprecated_UREnabled = false
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// Upgrade to v1 configuration if appropriate
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if cfg.Version == 1 {
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convertV1V2(cfg)
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}
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// Upgrade to v3 configuration if appropriate
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if cfg.Version == 2 {
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convertV2V3(cfg)
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}
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// Upgrade to v4 configuration if appropriate
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if cfg.Version == 3 {
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convertV3V4(cfg)
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}
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// Upgrade to v5 configuration if appropriate
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if cfg.Version == 4 {
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convertV4V5(cfg)
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}
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// Upgrade to v6 configuration if appropriate
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if cfg.Version == 5 {
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convertV5V6(cfg)
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}
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// Upgrade to v7 configuration if appropriate
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if cfg.Version == 6 {
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convertV6V7(cfg)
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}
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// Hash old cleartext passwords
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if len(cfg.GUI.Password) > 0 && cfg.GUI.Password[0] != '$' {
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hash, err := bcrypt.GenerateFromPassword([]byte(cfg.GUI.Password), 0)
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if err != nil {
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l.Warnln("bcrypting password:", err)
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} else {
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cfg.GUI.Password = string(hash)
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}
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}
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// Build a list of available devices
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existingDevices := make(map[protocol.DeviceID]bool)
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for _, device := range cfg.Devices {
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existingDevices[device.DeviceID] = true
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}
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// Ensure this device is present in the config
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if !existingDevices[myID] {
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myName, _ := os.Hostname()
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cfg.Devices = append(cfg.Devices, DeviceConfiguration{
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DeviceID: myID,
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Name: myName,
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})
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existingDevices[myID] = true
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}
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sort.Sort(DeviceConfigurationList(cfg.Devices))
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// Ensure that any loose devices are not present in the wrong places
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// Ensure that there are no duplicate devices
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// Ensure that puller settings are sane
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for i := range cfg.Folders {
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cfg.Folders[i].Devices = ensureDevicePresent(cfg.Folders[i].Devices, myID)
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cfg.Folders[i].Devices = ensureExistingDevices(cfg.Folders[i].Devices, existingDevices)
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cfg.Folders[i].Devices = ensureNoDuplicates(cfg.Folders[i].Devices)
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if cfg.Folders[i].Copiers == 0 {
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cfg.Folders[i].Copiers = 1
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}
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if cfg.Folders[i].Pullers == 0 {
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cfg.Folders[i].Pullers = 16
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}
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sort.Sort(FolderDeviceConfigurationList(cfg.Folders[i].Devices))
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}
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// An empty address list is equivalent to a single "dynamic" entry
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for i := range cfg.Devices {
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n := &cfg.Devices[i]
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if len(n.Addresses) == 0 || len(n.Addresses) == 1 && n.Addresses[0] == "" {
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n.Addresses = []string{"dynamic"}
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}
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}
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cfg.Options.ListenAddress = uniqueStrings(cfg.Options.ListenAddress)
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cfg.Options.GlobalAnnServers = uniqueStrings(cfg.Options.GlobalAnnServers)
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if cfg.GUI.APIKey == "" {
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cfg.GUI.APIKey = randomString(32)
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}
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}
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// ChangeRequiresRestart returns true if updating the configuration requires a
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// complete restart.
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func ChangeRequiresRestart(from, to Configuration) bool {
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// Adding, removing or changing folders requires restart
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if !reflect.DeepEqual(from.Folders, to.Folders) {
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return true
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}
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// Removing a device requres restart
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toDevs := make(map[protocol.DeviceID]bool, len(from.Devices))
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for _, dev := range to.Devices {
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toDevs[dev.DeviceID] = true
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}
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for _, dev := range from.Devices {
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if _, ok := toDevs[dev.DeviceID]; !ok {
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return true
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}
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}
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// Changing usage reporting to on or off does not require a restart.
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to.Options.URAccepted = from.Options.URAccepted
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to.Options.URUniqueID = from.Options.URUniqueID
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// All of the generic options require restart
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if !reflect.DeepEqual(from.Options, to.Options) || !reflect.DeepEqual(from.GUI, to.GUI) {
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return true
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}
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return false
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}
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func convertV6V7(cfg *Configuration) {
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// Migrate announce server addresses to the new URL based format
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for i := range cfg.Options.GlobalAnnServers {
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cfg.Options.GlobalAnnServers[i] = "udp4://" + cfg.Options.GlobalAnnServers[i]
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}
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cfg.Version = 7
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}
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func convertV5V6(cfg *Configuration) {
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// Added ".stfolder" file at folder roots to identify mount issues
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// Doesn't affect the config itself, but uses config migrations to identify
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// the migration point.
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for _, folder := range Wrap("", *cfg).Folders() {
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// Best attempt, if it fails, it fails, the user will have to fix
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// it up manually, as the repo will not get started.
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folder.CreateMarker()
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}
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cfg.Version = 6
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}
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func convertV4V5(cfg *Configuration) {
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// Renamed a bunch of fields in the structs.
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if cfg.Deprecated_Nodes == nil {
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cfg.Deprecated_Nodes = []DeviceConfiguration{}
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}
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if cfg.Deprecated_Repositories == nil {
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cfg.Deprecated_Repositories = []FolderConfiguration{}
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}
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cfg.Devices = cfg.Deprecated_Nodes
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cfg.Folders = cfg.Deprecated_Repositories
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for i := range cfg.Folders {
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cfg.Folders[i].Path = cfg.Folders[i].Deprecated_Directory
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cfg.Folders[i].Deprecated_Directory = ""
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cfg.Folders[i].Devices = cfg.Folders[i].Deprecated_Nodes
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cfg.Folders[i].Deprecated_Nodes = nil
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}
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cfg.Deprecated_Nodes = nil
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cfg.Deprecated_Repositories = nil
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cfg.Version = 5
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}
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func convertV3V4(cfg *Configuration) {
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// In previous versions, rescan interval was common for each folder.
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// From now, it can be set independently. We have to make sure, that after upgrade
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// the individual rescan interval will be defined for every existing folder.
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for i := range cfg.Deprecated_Repositories {
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cfg.Deprecated_Repositories[i].RescanIntervalS = cfg.Options.Deprecated_RescanIntervalS
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}
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cfg.Options.Deprecated_RescanIntervalS = 0
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// In previous versions, folders held full device configurations.
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// Since that's the only place where device configs were in V1, we still have
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// to define the deprecated fields to be able to upgrade from V1 to V4.
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for i, folder := range cfg.Deprecated_Repositories {
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for j := range folder.Deprecated_Nodes {
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rncfg := cfg.Deprecated_Repositories[i].Deprecated_Nodes[j]
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rncfg.Deprecated_Name = ""
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rncfg.Deprecated_Addresses = nil
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}
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}
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cfg.Version = 4
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}
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func convertV2V3(cfg *Configuration) {
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// In previous versions, compression was always on. When upgrading, enable
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// compression on all existing new. New devices will get compression on by
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// default by the GUI.
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for i := range cfg.Deprecated_Nodes {
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cfg.Deprecated_Nodes[i].Compression = true
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}
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// The global discovery format and port number changed in v0.9. Having the
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// default announce server but old port number is guaranteed to be legacy.
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if len(cfg.Options.GlobalAnnServers) == 1 && cfg.Options.GlobalAnnServers[0] == "announce.syncthing.net:22025" {
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cfg.Options.GlobalAnnServers = []string{"announce.syncthing.net:22026"}
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}
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cfg.Version = 3
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}
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func convertV1V2(cfg *Configuration) {
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// Collect the list of devices.
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// Replace device configs inside folders with only a reference to the
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// device ID. Set all folders to read only if the global read only flag is
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// set.
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var devices = map[string]FolderDeviceConfiguration{}
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for i, folder := range cfg.Deprecated_Repositories {
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cfg.Deprecated_Repositories[i].ReadOnly = cfg.Options.Deprecated_ReadOnly
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for j, device := range folder.Deprecated_Nodes {
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id := device.DeviceID.String()
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if _, ok := devices[id]; !ok {
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devices[id] = device
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}
|
|
cfg.Deprecated_Repositories[i].Deprecated_Nodes[j] = FolderDeviceConfiguration{DeviceID: device.DeviceID}
|
|
}
|
|
}
|
|
cfg.Options.Deprecated_ReadOnly = false
|
|
|
|
// Set and sort the list of devices.
|
|
for _, device := range devices {
|
|
cfg.Deprecated_Nodes = append(cfg.Deprecated_Nodes, DeviceConfiguration{
|
|
DeviceID: device.DeviceID,
|
|
Name: device.Deprecated_Name,
|
|
Addresses: device.Deprecated_Addresses,
|
|
})
|
|
}
|
|
sort.Sort(DeviceConfigurationList(cfg.Deprecated_Nodes))
|
|
|
|
// GUI
|
|
cfg.GUI.Address = cfg.Options.Deprecated_GUIAddress
|
|
cfg.GUI.Enabled = cfg.Options.Deprecated_GUIEnabled
|
|
cfg.Options.Deprecated_GUIEnabled = false
|
|
cfg.Options.Deprecated_GUIAddress = ""
|
|
|
|
cfg.Version = 2
|
|
}
|
|
|
|
func setDefaults(data interface{}) error {
|
|
s := reflect.ValueOf(data).Elem()
|
|
t := s.Type()
|
|
|
|
for i := 0; i < s.NumField(); i++ {
|
|
f := s.Field(i)
|
|
tag := t.Field(i).Tag
|
|
|
|
v := tag.Get("default")
|
|
if len(v) > 0 {
|
|
switch f.Interface().(type) {
|
|
case string:
|
|
f.SetString(v)
|
|
|
|
case int:
|
|
i, err := strconv.ParseInt(v, 10, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
f.SetInt(i)
|
|
|
|
case bool:
|
|
f.SetBool(v == "true")
|
|
|
|
case []string:
|
|
// We don't do anything with string slices here. Any default
|
|
// we set will be appended to by the XML decoder, so we fill
|
|
// those after decoding.
|
|
|
|
default:
|
|
panic(f.Type())
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// fillNilSlices sets default value on slices that are still nil.
|
|
func fillNilSlices(data interface{}) error {
|
|
s := reflect.ValueOf(data).Elem()
|
|
t := s.Type()
|
|
|
|
for i := 0; i < s.NumField(); i++ {
|
|
f := s.Field(i)
|
|
tag := t.Field(i).Tag
|
|
|
|
v := tag.Get("default")
|
|
if len(v) > 0 {
|
|
switch f.Interface().(type) {
|
|
case []string:
|
|
if f.IsNil() {
|
|
rv := reflect.MakeSlice(reflect.TypeOf([]string{}), 1, 1)
|
|
rv.Index(0).SetString(v)
|
|
f.Set(rv)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func uniqueStrings(ss []string) []string {
|
|
var m = make(map[string]bool, len(ss))
|
|
for _, s := range ss {
|
|
m[s] = true
|
|
}
|
|
|
|
var us = make([]string, 0, len(m))
|
|
for k := range m {
|
|
us = append(us, k)
|
|
}
|
|
|
|
return us
|
|
}
|
|
|
|
func ensureDevicePresent(devices []FolderDeviceConfiguration, myID protocol.DeviceID) []FolderDeviceConfiguration {
|
|
for _, device := range devices {
|
|
if device.DeviceID.Equals(myID) {
|
|
return devices
|
|
}
|
|
}
|
|
|
|
devices = append(devices, FolderDeviceConfiguration{
|
|
DeviceID: myID,
|
|
})
|
|
|
|
return devices
|
|
}
|
|
|
|
func ensureExistingDevices(devices []FolderDeviceConfiguration, existingDevices map[protocol.DeviceID]bool) []FolderDeviceConfiguration {
|
|
count := len(devices)
|
|
i := 0
|
|
loop:
|
|
for i < count {
|
|
if _, ok := existingDevices[devices[i].DeviceID]; !ok {
|
|
devices[i] = devices[count-1]
|
|
count--
|
|
continue loop
|
|
}
|
|
i++
|
|
}
|
|
return devices[0:count]
|
|
}
|
|
|
|
func ensureNoDuplicates(devices []FolderDeviceConfiguration) []FolderDeviceConfiguration {
|
|
count := len(devices)
|
|
i := 0
|
|
seenDevices := make(map[protocol.DeviceID]bool)
|
|
loop:
|
|
for i < count {
|
|
id := devices[i].DeviceID
|
|
if _, ok := seenDevices[id]; ok {
|
|
devices[i] = devices[count-1]
|
|
count--
|
|
continue loop
|
|
}
|
|
seenDevices[id] = true
|
|
i++
|
|
}
|
|
return devices[0:count]
|
|
}
|
|
|
|
type DeviceConfigurationList []DeviceConfiguration
|
|
|
|
func (l DeviceConfigurationList) Less(a, b int) bool {
|
|
return l[a].DeviceID.Compare(l[b].DeviceID) == -1
|
|
}
|
|
func (l DeviceConfigurationList) Swap(a, b int) {
|
|
l[a], l[b] = l[b], l[a]
|
|
}
|
|
func (l DeviceConfigurationList) Len() int {
|
|
return len(l)
|
|
}
|
|
|
|
type FolderDeviceConfigurationList []FolderDeviceConfiguration
|
|
|
|
func (l FolderDeviceConfigurationList) Less(a, b int) bool {
|
|
return l[a].DeviceID.Compare(l[b].DeviceID) == -1
|
|
}
|
|
func (l FolderDeviceConfigurationList) Swap(a, b int) {
|
|
l[a], l[b] = l[b], l[a]
|
|
}
|
|
func (l FolderDeviceConfigurationList) Len() int {
|
|
return len(l)
|
|
}
|
|
|
|
// randomCharset contains the characters that can make up a randomString().
|
|
const randomCharset = "01234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-"
|
|
|
|
// randomString returns a string of random characters (taken from
|
|
// randomCharset) of the specified length.
|
|
func randomString(l int) string {
|
|
bs := make([]byte, l)
|
|
for i := range bs {
|
|
bs[i] = randomCharset[rand.Intn(len(randomCharset))]
|
|
}
|
|
return string(bs)
|
|
}
|