/
packet-typing.go
135 lines (121 loc) · 4.2 KB
/
packet-typing.go
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package gosftp
import (
"encoding"
"github.com/pkg/errors"
)
// all incoming packets
type requestPacket interface {
encoding.BinaryUnmarshaler
id() uint32
}
type requestChan chan requestPacket
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 }
// hasHandle
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() {}
// 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 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 ssh_FXP_INIT:
pkt = &sshFxInitPacket{}
case ssh_FXP_LSTAT:
pkt = &sshFxpLstatPacket{}
case ssh_FXP_OPEN:
pkt = &sshFxpOpenPacket{}
case ssh_FXP_CLOSE:
pkt = &sshFxpClosePacket{}
case ssh_FXP_READ:
pkt = &sshFxpReadPacket{}
case ssh_FXP_WRITE:
pkt = &sshFxpWritePacket{}
case ssh_FXP_FSTAT:
pkt = &sshFxpFstatPacket{}
case ssh_FXP_SETSTAT:
pkt = &sshFxpSetstatPacket{}
case ssh_FXP_FSETSTAT:
pkt = &sshFxpFsetstatPacket{}
case ssh_FXP_OPENDIR:
pkt = &sshFxpOpendirPacket{}
case ssh_FXP_READDIR:
pkt = &sshFxpReaddirPacket{}
case ssh_FXP_REMOVE:
pkt = &sshFxpRemovePacket{}
case ssh_FXP_MKDIR:
pkt = &sshFxpMkdirPacket{}
case ssh_FXP_RMDIR:
pkt = &sshFxpRmdirPacket{}
case ssh_FXP_REALPATH:
pkt = &sshFxpRealpathPacket{}
case ssh_FXP_STAT:
pkt = &sshFxpStatPacket{}
case ssh_FXP_RENAME:
pkt = &sshFxpRenamePacket{}
case ssh_FXP_READLINK:
pkt = &sshFxpReadlinkPacket{}
case ssh_FXP_SYMLINK:
pkt = &sshFxpSymlinkPacket{}
case ssh_FXP_EXTENDED:
pkt = &sshFxpExtendedPacket{}
default:
return nil, errors.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
}