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package openssh
import (
sshfx "github.com/pkg/sftp/internal/encoding/ssh/filexfer"
)
const extensionFSync = "fsync@openssh.com"
// RegisterExtensionFSync registers the "fsync@openssh.com" extended packet with the encoding/ssh/filexfer package.
func RegisterExtensionFSync() {
sshfx.RegisterExtendedPacketType(extensionFSync, func() sshfx.ExtendedData {
return new(FSyncExtendedPacket)
})
}
// ExtensionFSync returns an ExtensionPair suitable to append into an sshfx.InitPacket or sshfx.VersionPacket.
func ExtensionFSync() *sshfx.ExtensionPair {
return &sshfx.ExtensionPair{
Name: extensionFSync,
Data: "1",
}
}
// FSyncExtendedPacket defines the fsync@openssh.com extend packet.
type FSyncExtendedPacket struct {
Handle string
}
// Type returns the SSH_FXP_EXTENDED packet type.
func (ep *FSyncExtendedPacket) Type() sshfx.PacketType {
return sshfx.PacketTypeExtended
}
// MarshalPacket returns ep as a two-part binary encoding of the full extended packet.
func (ep *FSyncExtendedPacket) MarshalPacket(reqid uint32, b []byte) (header, payload []byte, err error) {
p := &sshfx.ExtendedPacket{
ExtendedRequest: extensionFSync,
Data: ep,
}
return p.MarshalPacket(reqid, b)
}
// MarshalInto encodes ep into the binary encoding of the fsync@openssh.com extended packet-specific data.
func (ep *FSyncExtendedPacket) MarshalInto(buf *sshfx.Buffer) {
buf.AppendString(ep.Handle)
}
// MarshalBinary encodes ep into the binary encoding of the fsync@openssh.com extended packet-specific data.
//
// NOTE: This _only_ encodes the packet-specific data, it does not encode the full extended packet.
func (ep *FSyncExtendedPacket) MarshalBinary() ([]byte, error) {
// string(handle)
size := 4 + len(ep.Handle)
buf := sshfx.NewBuffer(make([]byte, 0, size))
ep.MarshalInto(buf)
return buf.Bytes(), nil
}
// UnmarshalFrom decodes the fsync@openssh.com extended packet-specific data from buf.
func (ep *FSyncExtendedPacket) UnmarshalFrom(buf *sshfx.Buffer) (err error) {
if ep.Handle, err = buf.ConsumeString(); err != nil {
return err
}
return nil
}
// UnmarshalBinary decodes the fsync@openssh.com extended packet-specific data into ep.
func (ep *FSyncExtendedPacket) UnmarshalBinary(data []byte) (err error) {
return ep.UnmarshalFrom(sshfx.NewBuffer(data))
}
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