forked from kaiakz/rsync-os
/
sender.go
214 lines (183 loc) · 3.85 KB
/
sender.go
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package rsync
import (
"bytes"
)
type Sender struct {
conn *Conn
module string
path string
seed int32
lVer int32
rVer int32
storage FS
}
func (s *Sender) SendFileList() error {
list, err := s.storage.List()
if err != nil {
return err
}
// Send list to receiver
var last *FileInfo = nil
for _, f := range list {
var flags byte = 0
if bytes.Equal(f.Path, []byte(".")) {
if f.Mode.IsDIR() {
flags |= FLIST_TOP_LEVEL
}
} else {
if f.Mode.IsDIR() { // TODO: recursive
// flags |= Flags.NO_CONTENT_DIR | Flags.XFLAGS;
}
}
lPathCount := 0
if last != nil {
lPathCount = longestMatch(last.Path, f.Path)
if lPathCount > 255 { // Limit to 255 chars
lPathCount = 255
}
if lPathCount > 0 {
flags |= FLIST_NAME_SAME
}
if last.Mode == f.Mode {
flags |= FLIST_MODE_SAME
}
if last.Mtime == f.Mtime {
flags |= FLIST_TIME_SAME
}
//
//
//
}
rPathCount := int32(len(f.Path) - lPathCount)
if rPathCount > 255 {
flags |= FLIST_NAME_LONG
}
/* we must make sure we don't send a zero flags byte or the other
end will terminate the flist transfer */
if flags == 0 && !f.Mode.IsDIR() {
flags |= 1 << 0
}
if flags == 0 {
flags |= FLIST_NAME_LONG
}
/* Send flags */
if err != s.conn.WriteByte(flags) {
return err
}
/* Send len of path, and bytes of path */
if flags&FLIST_NAME_SAME != 0 {
if err = s.conn.WriteByte(flags); err != nil {
return err
}
}
if flags&FLIST_NAME_LONG != 0 {
if err = s.conn.WriteInt(rPathCount); err != nil {
return err
}
} else {
if err = s.conn.WriteByte(byte(rPathCount)); err != nil {
return err
}
}
if _, err = s.conn.Write(f.Path[lPathCount:]); err != nil {
return err
}
/* Send size of file */
if err = s.conn.WriteLong(f.Size); err != nil {
return err
}
/* Send Mtime, GID, UID, RDEV if needed */
if flags&FLIST_TIME_SAME == 0 {
if err = s.conn.WriteInt(f.Mtime); err != nil {
return err
}
}
if flags&FLIST_MODE_SAME == 0 {
if err = s.conn.WriteInt(int32(f.Mode)); err != nil {
return err
}
}
// TODO: UID GID RDEV
// TODO: Send symlink
// TODO: if always_checksum?
last = &f
}
return nil
}
func (s *Sender) Generator(fileList FileList) error {
for {
index, err := s.conn.ReadInt()
if err != nil {
return err
} else if index == INDEX_END {
break
}
// Receive block checksum from receiver
count, err := s.conn.ReadInt()
if err != nil {
return nil
}
blen, err := s.conn.ReadInt()
if err != nil {
return nil
}
s2len, err := s.conn.ReadInt()
if err != nil {
return nil
} else if s2len > 16 {
// FIXME: check if sum2 length is valid
}
remainder, err := s.conn.ReadInt()
if err != nil {
return nil
}
sums := make([]SumChunk, 0, count)
var (
i int32 = 0
offset int64 = 0
)
for ; i < count; i++ {
sum1, err := s.conn.ReadInt() // sum1:
if err != nil {
return err
}
sum2 := make([]byte, 16)
if _, err := s.conn.Read(sum2); err != nil {
return err
}
chunk := new(SumChunk)
chunk.sum1 = uint32(sum1)
chunk.sum2 = sum2
chunk.fileOffset = offset
if i == count-1 && remainder != 0 {
chunk.chunkLen = uint(remainder)
} else {
chunk.chunkLen = uint(blen)
}
offset += int64(chunk.chunkLen)
sums = append(sums)
}
result := new(SumStruct)
result.fileLen = uint64(offset)
result.count = uint64(count)
result.blockLen = uint64(blen)
result.sum2Len = uint64(s2len)
result.remainder = uint64(remainder)
}
if err := s.FileUploader(); err != nil {
return err
}
return nil
}
func (s *Sender) FileUploader() error {
panic("Not implemented yet")
return nil
}
func (s *Sender) FinalPhase() error {
panic("Not implemented yet")
return nil
}
func (s *Sender) Sync() error {
panic("Not implemented yet")
return nil
}