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message.go
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message.go
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// Copyright (C) 2014 The Syncthing Authors.
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. If not, see <http://www.gnu.org/licenses/>.
//go:generate -command genxdr go run ../../Godeps/_workspace/src/github.com/calmh/xdr/cmd/genxdr/main.go
//go:generate genxdr -o message_xdr.go message.go
package protocol
import "fmt"
type IndexMessage struct {
Folder string // max:64
Files []FileInfo
}
type FileInfo struct {
Name string // max:8192
Flags uint32
Modified int64
Version uint64
LocalVersion uint64
Blocks []BlockInfo
}
func (f FileInfo) String() string {
return fmt.Sprintf("File{Name:%q, Flags:0%o, Modified:%d, Version:%d, Size:%d, Blocks:%v}",
f.Name, f.Flags, f.Modified, f.Version, f.Size(), f.Blocks)
}
func (f FileInfo) Size() (bytes int64) {
if f.IsDeleted() || f.IsDirectory() {
return 128
}
for _, b := range f.Blocks {
bytes += int64(b.Size)
}
return
}
func (f FileInfo) IsDeleted() bool {
return f.Flags&FlagDeleted != 0
}
func (f FileInfo) IsInvalid() bool {
return f.Flags&FlagInvalid != 0
}
func (f FileInfo) IsDirectory() bool {
return f.Flags&FlagDirectory != 0
}
func (f FileInfo) IsSymlink() bool {
return f.Flags&FlagSymlink != 0
}
func (f FileInfo) HasPermissionBits() bool {
return f.Flags&FlagNoPermBits == 0
}
func (f FileInfo) ToTruncated() FileInfoTruncated {
return FileInfoTruncated{
Name: f.Name,
Flags: f.Flags,
Modified: f.Modified,
Version: f.Version,
LocalVersion: f.LocalVersion,
NumBlocks: uint32(len(f.Blocks)),
}
}
// Used for unmarshalling a FileInfo structure but skipping the actual block list
type FileInfoTruncated struct {
Name string // max:8192
Flags uint32
Modified int64
Version uint64
LocalVersion uint64
NumBlocks uint32
}
func (f FileInfoTruncated) String() string {
return fmt.Sprintf("File{Name:%q, Flags:0%o, Modified:%d, Version:%d, Size:%d, NumBlocks:%d}",
f.Name, f.Flags, f.Modified, f.Version, f.Size(), f.NumBlocks)
}
func BlocksToSize(num uint32) int64 {
if num < 2 {
return BlockSize / 2
}
return int64(num-1)*BlockSize + BlockSize/2
}
// Returns a statistical guess on the size, not the exact figure
func (f FileInfoTruncated) Size() int64 {
if f.IsDeleted() || f.IsDirectory() {
return 128
}
return BlocksToSize(f.NumBlocks)
}
func (f FileInfoTruncated) IsDeleted() bool {
return f.Flags&FlagDeleted != 0
}
func (f FileInfoTruncated) IsInvalid() bool {
return f.Flags&FlagInvalid != 0
}
func (f FileInfoTruncated) IsDirectory() bool {
return f.Flags&FlagDirectory != 0
}
func (f FileInfoTruncated) IsSymlink() bool {
return f.Flags&FlagSymlink != 0
}
func (f FileInfoTruncated) HasPermissionBits() bool {
return f.Flags&FlagNoPermBits == 0
}
type FileIntf interface {
Size() int64
IsDeleted() bool
IsInvalid() bool
IsDirectory() bool
IsSymlink() bool
HasPermissionBits() bool
}
type BlockInfo struct {
Offset int64 // noencode (cache only)
Size uint32
Hash []byte // max:64
}
func (b BlockInfo) String() string {
return fmt.Sprintf("Block{%d/%d/%x}", b.Offset, b.Size, b.Hash)
}
type RequestMessage struct {
Folder string // max:64
Name string // max:8192
Offset uint64
Size uint32
}
type ResponseMessage struct {
Data []byte
}
type ClusterConfigMessage struct {
ClientName string // max:64
ClientVersion string // max:64
Folders []Folder // max:64
Options []Option // max:64
}
func (o *ClusterConfigMessage) GetOption(key string) string {
for _, option := range o.Options {
if option.Key == key {
return option.Value
}
}
return ""
}
type Folder struct {
ID string // max:64
Devices []Device
}
type Device struct {
ID []byte // max:32
Flags uint32
MaxLocalVersion uint64
}
type Option struct {
Key string // max:64
Value string // max:1024
}
type CloseMessage struct {
Reason string // max:1024
}
type EmptyMessage struct{}