net.sf.hermesftp.cmd.impl
Class FtpCmdPasv

java.lang.Object
  net.sf.hermesftp.cmd.AbstractFtpCmd
      net.sf.hermesftp.cmd.AbstractFtpCmdPasv
          net.sf.hermesftp.cmd.impl.FtpCmdPasv

All Implemented Interfaces:

java.lang.Cloneable, FtpCmd, FtpConstants

public class FtpCmdPasv
extends AbstractFtpCmdPasv

PASSIVE (PASV)

This command requests the server-DTP to "listen" on a data port (which is not its default data port) and to wait for a connection rather than initiate one upon receipt of a transfer command. The response to this command includes the host and port address this server is listening on.

[Excerpt from RFC-959, Postel and Reynolds]

Author:

Lars Behnke

Field Summary

Fields inherited from interface net.sf.hermesftp.common.FtpConstants

ATTR_CLIENT_NAME, ATTR_DATA_PROT, ATTR_FILE_OFFSET, ATTR_FORCE_UTF8, ATTR_GROUP_DATA, ATTR_LOGIN_TIME, ATTR_RENAME_FILE, ATTR_RESTART_MARKERS, ATTR_SSL, ATTR_USER_DATA, BYTE_LENGTH, BYTE_MASK, DEFAULT_BEAN_RES, DEFAULT_KEYSTORE, DEFAULT_KEYSTORE_PASS, DT_ASCII, DT_BINARY, DT_EBCDIC, HERMES_HOME, MILLI, MODE_BLOCK, MODE_COMPRESS, MODE_STREAM, MODE_ZIP, MSG_GOODBYE, MSG150, MSG200, MSG200_NOTED, MSG200_PBSZ, MSG200_SIZE, MSG200_TYPE, MSG202, MSG211_FEAT_ENTRY, MSG211_FEAT_FOOTER, MSG211_FEAT_HEADER, MSG211_STAT, MSG213_SIZE, MSG213_TIME, MSG214, MSG220, MSG220_WEL, MSG226, MSG227, MSG229, MSG230, MSG234, MSG250, MSG257, MSG331, MSG350, MSG350_REST, MSG421, MSG425, MSG426, MSG431, MSG450, MSG451, MSG500, MSG500_CMD, MSG501, MSG501_PATH, MSG501_SIZE, MSG503, MSG503_USR, MSG504, MSG522, MSG530, MSG530_AUTH, MSG534, MSG536, MSG550, MSG550_COMM, MSG550_EXISTS, MSG550_MSG, MSG550_NOTEMPTY, MSG550_PERM, MSG553, OPT_ALLOWED_PASSIVE_PORTS, OPT_BUFFER_SIZE, OPT_CHARSET_ASCII, OPT_CHARSET_EBCDIC, OPT_EMULATE_UNIX, OPT_FTP_PORT, OPT_IPV4_BLACK_LIST, OPT_IPV6_BLACK_LIST, OPT_MAX_CONNECTIONS, OPT_MAX_DOWNLOAD_RATE, OPT_MAX_IDLE_SECONDS, OPT_MAX_UPLOAD_RATE, OPT_MSG_GOODBYE, OPT_MSG_WELCOME, OPT_REMOTE_DIR, OPT_SSL_ALLOW_EXPLICIT, OPT_SSL_ALLOW_IMPLICIT, OPT_SSL_CIPHER_SUITES, OPT_SSL_FORCE, OPT_SSL_KEYSTORE_FILE, OPT_SSL_KEYSTORE_PASS, OPT_SSL_PORT_IMPLICIT, PRIV_NONE, PRIV_READ, PRIV_READ_WRITE, PRIV_WRITE, PWD, SEPARATOR, SERVER_STATUS_HALTED, SERVER_STATUS_INIT, SERVER_STATUS_READY, SERVER_STATUS_UNDEF, SPACE, STAT_BYTES_DOWNLOADED, STAT_BYTES_UPLOADED, STAT_DOWNLOAD_RATE, STAT_FILES_DOWNLOADED, STAT_FILES_UPLOADED, STAT_UPLOAD_RATE, STRUCT_FILE, STRUCT_RECORD, TYPE_NAMES, WILDCARD

Constructor Summary

FtpCmdPasv()

Method Summary

protected java.lang.String	createResponseMessage(int protocolIdx, java.lang.String ip, int port) Returns the reponse string encoding ip address, port and protocol type.
java.lang.String	getHelp() Returns a short help text for the command.
protected int	getPreferredProtocol() Returns the preferred protocol version (1=IPv4, 2=IPv6, 0=undefined).

Methods inherited from class net.sf.hermesftp.cmd.AbstractFtpCmdPasv

execute, isAuthenticationRequired

Methods inherited from class net.sf.hermesftp.cmd.AbstractFtpCmd

getAbsPath, getAndResetFileOffset, getArguments, getCtx, getPathArg, getPermission, getToken, handleAsyncCmd, isResponded, msg, msg, msg, msgOut, msgOut, msgOut, out, setArguments, setCtx, setToken

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FtpCmdPasv

public FtpCmdPasv()

Method Detail

getPreferredProtocol

protected int getPreferredProtocol()

Returns the preferred protocol version (1=IPv4, 2=IPv6, 0=undefined).

Specified by:

getPreferredProtocol in class AbstractFtpCmdPasv

Returns:

The protocol version.

createResponseMessage

protected java.lang.String createResponseMessage(int protocolIdx,
                                                 java.lang.String ip,
                                                 int port)

Returns the reponse string encoding ip address, port and protocol type. Example: 229 Entering Extended Passive Mode (|||6000|).

Specified by:

createResponseMessage in class AbstractFtpCmdPasv

Parameters:

protocolIdx - The protocol index (1=IPv4, 2=IPv6).

ip - The address.

port - The port.

Returns:

The string encoding the connection data in an appropriate format.

getHelp

public java.lang.String getHelp()

Returns a short help text for the command.

Returns:

The help text.