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