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