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package sftp
import (
"encoding"
"fmt"
)
// all incoming packets
type requestPacket interface {
encoding.BinaryUnmarshaler
id() uint32
}
type responsePacket interface {
encoding.BinaryMarshaler
id() uint32
}
// interfaces to group types
type hasPath interface {
requestPacket
getPath() string
}
type hasHandle interface {
requestPacket
getHandle() string
}
type notReadOnly interface {
notReadOnly()
}
//// define types by adding methods
// hasPath
func (p *sshFxpLstatPacket) getPath() string { return p.Path }
func (p *sshFxpStatPacket) getPath() string { return p.Path }
func (p *sshFxpRmdirPacket) getPath() string { return p.Path }
func (p *sshFxpReadlinkPacket) getPath() string { return p.Path }
func (p *sshFxpRealpathPacket) getPath() string { return p.Path }
func (p *sshFxpMkdirPacket) getPath() string { return p.Path }
func (p *sshFxpSetstatPacket) getPath() string { return p.Path }
func (p *sshFxpStatvfsPacket) getPath() string { return p.Path }
func (p *sshFxpRemovePacket) getPath() string { return p.Filename }
func (p *sshFxpRenamePacket) getPath() string { return p.Oldpath }
func (p *sshFxpSymlinkPacket) getPath() string { return p.Targetpath }
func (p *sshFxpOpendirPacket) getPath() string { return p.Path }
func (p *sshFxpOpenPacket) getPath() string { return p.Path }
func (p *sshFxpExtendedPacketPosixRename) getPath() string { return p.Oldpath }
func (p *sshFxpExtendedPacketHardlink) getPath() string { return p.Oldpath }
// getHandle
func (p *sshFxpFstatPacket) getHandle() string { return p.Handle }
func (p *sshFxpFsetstatPacket) getHandle() string { return p.Handle }
func (p *sshFxpReadPacket) getHandle() string { return p.Handle }
func (p *sshFxpWritePacket) getHandle() string { return p.Handle }
func (p *sshFxpReaddirPacket) getHandle() string { return p.Handle }
func (p *sshFxpClosePacket) getHandle() string { return p.Handle }
// notReadOnly
func (p *sshFxpWritePacket) notReadOnly() {}
func (p *sshFxpSetstatPacket) notReadOnly() {}
func (p *sshFxpFsetstatPacket) notReadOnly() {}
func (p *sshFxpRemovePacket) notReadOnly() {}
func (p *sshFxpMkdirPacket) notReadOnly() {}
func (p *sshFxpRmdirPacket) notReadOnly() {}
func (p *sshFxpRenamePacket) notReadOnly() {}
func (p *sshFxpSymlinkPacket) notReadOnly() {}
func (p *sshFxpExtendedPacketPosixRename) notReadOnly() {}
func (p *sshFxpExtendedPacketHardlink) notReadOnly() {}
// some packets with ID are missing id()
func (p *sshFxpDataPacket) id() uint32 { return p.ID }
func (p *sshFxpStatusPacket) id() uint32 { return p.ID }
func (p *sshFxpStatResponse) id() uint32 { return p.ID }
func (p *sshFxpNamePacket) id() uint32 { return p.ID }
func (p *sshFxpHandlePacket) id() uint32 { return p.ID }
func (p *StatVFS) id() uint32 { return p.ID }
func (p *sshFxVersionPacket) id() uint32 { return 0 }
// take raw incoming packet data and build packet objects
func makePacket(p rxPacket) (requestPacket, error) {
var pkt requestPacket
switch p.pktType {
case sshFxpInit:
pkt = &sshFxInitPacket{}
case sshFxpLstat:
pkt = &sshFxpLstatPacket{}
case sshFxpOpen:
pkt = &sshFxpOpenPacket{}
case sshFxpClose:
pkt = &sshFxpClosePacket{}
case sshFxpRead:
pkt = &sshFxpReadPacket{}
case sshFxpWrite:
pkt = &sshFxpWritePacket{}
case sshFxpFstat:
pkt = &sshFxpFstatPacket{}
case sshFxpSetstat:
pkt = &sshFxpSetstatPacket{}
case sshFxpFsetstat:
pkt = &sshFxpFsetstatPacket{}
case sshFxpOpendir:
pkt = &sshFxpOpendirPacket{}
case sshFxpReaddir:
pkt = &sshFxpReaddirPacket{}
case sshFxpRemove:
pkt = &sshFxpRemovePacket{}
case sshFxpMkdir:
pkt = &sshFxpMkdirPacket{}
case sshFxpRmdir:
pkt = &sshFxpRmdirPacket{}
case sshFxpRealpath:
pkt = &sshFxpRealpathPacket{}
case sshFxpStat:
pkt = &sshFxpStatPacket{}
case sshFxpRename:
pkt = &sshFxpRenamePacket{}
case sshFxpReadlink:
pkt = &sshFxpReadlinkPacket{}
case sshFxpSymlink:
pkt = &sshFxpSymlinkPacket{}
case sshFxpExtended:
pkt = &sshFxpExtendedPacket{}
default:
return nil, fmt.Errorf("unhandled packet type: %s", p.pktType)
}
if err := pkt.UnmarshalBinary(p.pktBytes); err != nil {
// Return partially unpacked packet to allow callers to return
// error messages appropriately with necessary id() method.
return pkt, err
}
return pkt, nil
}
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