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use super::*;
use std::io::prelude::*;
use std::io;
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum CommandKind
{
/// Abort an active file transfer.
ABOR(ABOR),
/// Account information.
ACCT(ACCT),
/// Authentication/Security Data.
ADAT(ADAT),
/// Allocate sufficient disk space to receive a file.
ALLO(ALLO),
/// Append.
APPE(APPE),
/// Authentication/Security Mechanism.
AUTH(AUTH),
/// Clear Command Channel.
CCC(CCC),
/// Change directory up one level.
CDUP(CDUP),
/// Confidentiality Protection Command.
CONF(CONF),
/// Change working directory.
CWD(CWD),
/// Delete file.
DELE(DELE),
/// Privacy Protected Channel.
ENC(ENC),
/// Specifies an extended address and port to which the server should connect.
EPRT(EPRT),
/// Enter extended passive mode.
EPSV(EPSV),
/// Get the feature list implemented by the server.
FEAT(FEAT),
/// Returns usage documentation on a command if specified, else a
/// general help document is returned.
HELP(HELP),
/// Identify desired virtual host on server, by name.
HOST(HOST),
/// Language Negotiation.
LANG(LANG),
/// Returns information of a file or directory if specified, else
/// information of the current working directory is returned.
LIST(LIST),
/// Specifies a long address and port to which the server should connect.
LPRT(LPRT),
/// Enter long passive mode.
LPSV(LPSV),
/// Return the last-modified time of a specified file.
MDTM(MDTM),
/// Integrity Protected Command.
MIC(MIC),
/// Make directory.
MKD(MKD),
/// Lists the contents of a directory if a directory is named.
MLSD(MLSD),
/// Provides data about exactly the object named on its command line,
/// and no others.
MLST(MLST),
/// Sets the transfer mode.
MODE(MODE),
/// Returns a list of file names in a specified directory.
NLST(NLST),
/// A no-operation.
NOOP(NOOP),
/// Select options for a feature.
OPTS(OPTS),
/// Authentication password.
PASS(PASS),
/// Enter passive mode.
PASV(PASV),
/// Protection Buffer Size.
PBSZ(PBSZ),
/// Specifies an address and port to which the server should connect.
PORT(PORT),
/// Data Channel Protection Level.
PROT(PROT),
/// Gets the name of the current working directory on the remote host.
PWD(PWD),
/// Terminates the command connection.
QUIT(QUIT),
/// Reinitializes the command connection.
REIN(REIN),
/// Restart transfer from the specified point.
REST(REST),
/// Retrieve a copy of the file.
RETR(RETR),
/// Remove a directory.
RMD(RMD),
/// Rename from.
RNFR(RNFR),
/// Rename to.
RNTO(RNTO),
/// Sends site specific commands to remote server.
SITE(SITE),
/// Return the size of a file.
SIZE(SIZE),
/// Mount file structure.
SMNT(SMNT),
/// Returns the current status.
STAT(STAT),
/// Accept the data and to store the data as a file at the server site.
STOR(STOR),
/// Store file uniquely.
STOU(STOU),
/// Set file transfer structure.
STRU(STRU),
/// Returns a word identifying the system.
SYST(SYST),
/// Sets the transfer mode (ASCII/binary).
TYPE(TYPE),
/// Sets the name for the user.
USER(USER),
/// Change to the parent of the current working directory.
XCUP(XCUP),
/// Make a directory.
XMKD(XMKD),
/// Print the current working directory.
XPWD(XPWD),
XRCP(XRCP),
/// Remove the directory.
XRMD(XRMD),
XRSQ(XRSQ),
/// Send, mail if cannot.
XSEM(XSEM),
/// Send to terminal.
XSEN(XSEN),
}
impl CommandKind
{
/// Reads a command from a buffer.
pub fn read(read: &mut Read) -> Result<Self, Error> {
let line_bytes: Result<Vec<u8>, _> = read.bytes().take_while(|b| b.as_ref().map(|&b| (b as char) != '\n').unwrap_or(true)).collect();
let mut line_bytes = line_bytes?;
// Every new line should use '\r\n', and we trimmed the '\n' above.
assert_eq!(line_bytes.last(), Some(&('\r' as u8)), "new lines should be CR+LF, not just LF");
line_bytes.pop();
let line_string = String::from_utf8(line_bytes)?;
// Split the line up.
let (command_name, payload) = if line_string.contains(' ') {
line_string.split_at(line_string.chars().position(|c| c == ' ').expect("no space in line"))
} else {
// If the line has no space, it has no payload.
(line_string.as_str(), "")
};
let mut payload_reader = io::BufReader::new(io::Cursor::new(payload));
macro_rules! read_commands {
( $cmd_name:ident => $( $name:ident ),+ ) => {
match command_name {
$( stringify!($name) => Ok(CommandKind::$name($name::read_payload(&mut payload_reader)?)), )+
_ => Err(ErrorKind::InvalidCommand(command_name.to_owned()).into()),
}
}
}
read_commands!(command_name =>
ABOR, ACCT, ADAT, ALLO, APPE, AUTH, CCC, CDUP, CONF, CWD, DELE, ENC,
EPRT, EPSV, FEAT, HELP, HOST, LANG, LIST, LPRT, LPSV, MDTM, MIC, MKD,
MLSD, MLST, MODE, NLST, NOOP, OPTS, PASS, PASV, PBSZ, PORT, PROT, PWD,
QUIT, REIN, REST, RETR, RMD, RNFR, RNTO, SITE, SIZE, SMNT, STAT, STOR,
STOU, STRU, SYST, TYPE, USER, XCUP, XMKD, XPWD, XRCP, XRMD, XRSQ, XSEM,
XSEN
)
}
pub fn command_name(&self) -> &'static str {
macro_rules! handle_commands {
( $($cmd_name:ident),* ) => {
match *self {
$( CommandKind::$cmd_name(ref cmd) => cmd.command_name() ),+
}
}
}
handle_commands!(
ABOR, ACCT, ADAT, ALLO, APPE, AUTH, CCC, CDUP, CONF, CWD, DELE, ENC,
EPRT, EPSV, FEAT, HELP, HOST, LANG, LIST, LPRT, LPSV, MDTM, MIC, MKD,
MLSD, MLST, MODE, NLST, NOOP, OPTS, PASS, PASV, PBSZ, PORT, PROT, PWD,
QUIT, REIN, REST, RETR, RMD, RNFR, RNTO, SITE, SIZE, SMNT, STAT, STOR,
STOU, STRU, SYST, TYPE, USER, XCUP, XMKD, XPWD, XRCP, XRMD, XRSQ, XSEM,
XSEN
)
}
}