layer

const (
	FTPCommandAbor FTPCommand = iota + 1 // ABOR Abort an active file transfer.
	FTPCommandAcct                       // ACCT Account information.
	FTPCommandAdat                       // ADAT RFC 2228 Authentication/Security Data
	FTPCommandAllo                       // ALLO Allocate sufficient disk space to receive a file.
	FTPCommandAppe                       // APPE Append (with create)
	FTPCommandAuth                       // AUTH RFC 2228 Authentication/Security Mechanism
	FTPCommandAvbl                       // AVBL Streamlined FTP Command Extensions Get the available space
	FTPCommandCcc                        // CCC RFC 2228 Clear Command Channel
	FTPCommandCdup                       // CDUP Change to Parent Directory.
	FTPCommandConf                       // CONF RFC 2228 Confidentiality Protection Command
	FTPCommandCsid                       // CSID Streamlined FTP Command Extensions Client / Server Identification
	FTPCommandCwd                        // CWD RFC 697 Change working directory.
	FTPCommandDele                       // DELE Delete file.
	FTPCommandDsiz                       // DSIZ Streamlined FTP Command Extensions Get the directory size
	FTPCommandEnc                        // ENC RFC 2228 Privacy Protected Channel
	FTPCommandEprt                       // EPRT RFC 2428 Specifies an extended address and port to which the server should connect.
	FTPCommandEpsv                       // EPSV RFC 2428 Enter extended passive mode.
	FTPCommandFeat                       // FEAT RFC 2389 Get the feature list implemented by the server.
	FTPCommandHelp                       // HELP Returns usage documentation on a command if specified, else a general help document is returned.
	FTPCommandHost                       // HOST RFC 7151 Identify desired virtual host on server, by name.
	FTPCommandLang                       // LANG RFC 2640 Language Negotiation
	FTPCommandList                       // LIST Returns information of a file or directory if specified, else information of the current working directory is returned.
	FTPCommandLprt                       // LPRT RFC 1639 Specifies a long address and port to which the server should connect.
	FTPCommandLpsv                       // LPSV RFC 1639 Enter long passive mode.
	FTPCommandMdtm                       // MDTM RFC 3659 Return the last-modified time of a specified file.
	FTPCommandMfct                       // MFCT The 'MFMT', 'MFCT', and 'MFF' Command Extensions for FTP Modify the creation time of a file.
	FTPCommandMff                        // MFF The 'MFMT', 'MFCT', and 'MFF' Command Extensions for FTP Modify fact (the last modification time, creation time, UNIX group/owner/mode of a file).
	FTPCommandMfmt                       // MFMT The 'MFMT', 'MFCT', and 'MFF' Command Extensions for FTP Modify the last modification time of a file.
	FTPCommandMic                        // MIC RFC 2228 Integrity Protected Command
	FTPCommandMkd                        // MKD Make directory.
	FTPCommandMlsd                       // MLSD RFC 3659 Lists the contents of a directory if a directory is named.
	FTPCommandMlst                       // MLST RFC 3659 Provides data about exactly the object named on its command line, and no others.
	FTPCommandMode                       // MODE Sets the transfer mode (Stream, Block, or Compressed).
	FTPCommandNlst                       // NLST Returns a list of file names in a specified directory.
	FTPCommandNoop                       // NOOP No operation (dummy packet; used mostly on keepalives).
	FTPCommandOpts                       // OPTS RFC 2389 Select options for a feature (for example OPTS UTF8 ON).
	FTPCommandPass                       // PASS Authentication password.
	FTPCommandPasv                       // PASV Enter passive mode.
	FTPCommandPbsz                       // PBSZ RFC 2228 Protection Buffer Size
	FTPCommandPort                       // PORT Specifies an address and port to which the server should connect.
	FTPCommandProt                       // PROT RFC 2228 Data Channel Protection Level.
	FTPCommandPwd                        // PWD Print working directory. Returns the current directory of the host.
	FTPCommandQuit                       // QUIT Disconnect.
	FTPCommandRein                       // REIN Re initializes the connection.
	FTPCommandRest                       // REST RFC 3659 Restart transfer from the specified point.
	FTPCommandRetr                       // RETR Retrieve a copy of the file
	FTPCommandRmd                        // RMD Remove a directory.
	FTPCommandRmda                       // RMDA Streamlined FTP Command Extensions Remove a directory tree
	FTPCommandRnfr                       // RNFR Rename from.
	FTPCommandRnto                       // RNTO Rename to.
	FTPCommandSite                       // SITE Sends site specific commands to remote server (like SITE IDLE 60 or SITE UMASK 002). Inspect SITE HELP output for complete list of supported commands.
	FTPCommandSize                       // SIZE RFC 3659 Return the size of a file.
	FTPCommandSmnt                       // SMNT Mount file structure.
	FTPCommandSpsv                       // SPSV FTP Extension Allowing IP Forwarding (NATs) Use single port passive mode (only one TCP port number for both control connections and passive-mode data connections)
	FTPCommandStat                       // STAT Returns the current status.
	FTPCommandStor                       // STOR Accept the data and to store the data as a file at the server site
	FTPCommandStou                       // STOU Store file uniquely.
	FTPCommandStru                       // STRU Set file transfer structure.
	FTPCommandSyst                       // SYST Return system type.
	FTPCommandThmb                       // THMB Streamlined FTP Command Extensions Get a thumbnail of a remote image file
	FTPCommandType                       // TYPE Sets the transfer mode (ASCII/Binary).
	FTPCommandUser                       // USER Authentication username.
	FTPCommandXcup                       // XCUP RFC 775 Change to the parent of the current working directory
	FTPCommandXmkd                       // XMKD RFC 775 Make a directory
	FTPCommandXpwd                       // XPWD RFC 775 Print the current working directory
	FTPCommandXrcp                       // XRCP RFC 743
	FTPCommandXrmd                       // XRMD RFC 775 Remove the directory
	FTPCommandXrsq                       // XRSQ RFC 743
	FTPCommandXsem                       // XSEM RFC 737 Send, mail if cannot
	FTPCommandXsen                       // XSEN RFC 737 Send to terminal
)