.-.-.-.-.-

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Based on RFC 854: TELNET Protocol Specification, by J. Postel and
J. Reynolds

Example:

>>> from telnetlib import Telnet
>>> tn = Telnet('www.python.org', 79)   # connect to finger port
>>> tn.write('guido\r\n')
>>> print tn.read_all()
Login       Name               TTY         Idle    When    Where
guido    Guido van Rossum      pts/2        <Dec  2 11:10> snag.cnri.reston..

>>>

Note that read_all() won't read until eof -- it just reads some data
-- but it guarantees to read at least one byte unless EOF is hit.

It is possible to pass a Telnet object to select.select() in order to
wait until more data is available.  Note that in this case,
read_eager() may return '' even if there was data on the socket,
because the protocol negotiation may have eaten the data.  This is why
EOFError is needed in some cases to distinguish between "no data" and
"connection closed" (since the socket also appears ready for reading
when it is closed).

To do:
- option negotiation
- timeout should be intrinsic to the connection object instead of an
  option on one of the read calls only

i����NtTelnetiii�i�i�i�i�i�i�i�i�i�i�i�i�i�i�i�iiiiiiiii	i
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�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�Z d d�Z!d d�Z"d d�Z#RS(!s�Telnet interface class.

An instance of this class represents a connection to a telnet
    server.  The instance is initially not connected; the open()
    method must be used to establish a connection.  Alternatively, the
    host name and optional port number can be passed to the
    constructor, too.

Don't try to reopen an already connected instance.

This class has many read_*() methods.  Note that some of them
    raise EOFError when the end of the connection is read, because
    they can return an empty string for other reasons.  See the
    individual doc strings.

read_until(expected, [timeout])
        Read until the expected string has been seen, or a timeout is
        hit (default is no timeout); may block.

read_all()
        Read all data until EOF; may block.

read_some()
        Read at least one byte or EOF; may block.

read_very_eager()
        Read all data available already queued or on the socket,
        without blocking.

read_eager()
        Read either data already queued or some data available on the
        socket, without blocking.

read_lazy()
        Read all data in the raw queue (processing it first), without
        doing any socket I/O.

read_very_lazy()
        Reads all data in the cooked queue, without doing any socket
        I/O.

read_sb_data()
        Reads available data between SB ... SE sequence. Don't block.

set_option_negotiation_callback(callback)
        Each time a telnet option is read on the input flow, this callback
        (if set) is called with the following parameters :
        callback(telnet socket, command, option)
            option will be chr(0) when there is no option.
        No other action is done afterwards by telnetlib.

icCs�t|_||_||_||_d|_d|_d|_d|_	d|_
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d|_ttd�|_|dk	r�|j|||�ndS(s�Constructor.

When called without arguments, create an unconnected instance.
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The optional second argument is the port number, which
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tTELNET_PORTRRRtsockettcreate_connectionR	(RRRR((s!/usr/lib64/python2.7/telnetlib.pyR�s					cCs|j�dS(s#Destructor -- close the connection.N(tclose(R((s!/usr/lib64/python2.7/telnetlib.pyt__del__�scGsA|jdkr=d|j|jfG|r5||GHq=|GHndS(s�Print a debug message, when the debug level is > 0.

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cCs
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The higher it is, the more debug output you get (on sys.stdout).

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scCsIt|kr%|jttt�}n|jd|�|jj|�dS(s�Write a string to the socket, doubling any IAC characters.

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When no match is found, return whatever is available instead,
        possibly the empty string.  Raise EOFError if the connection
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N(Rt_read_until_with_pollt_read_until_with_select(RtmatchR((s!/usr/lib64/python2.7/telnetlib.pyt
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||	�x=|dkr�|jr�y)|j|dkr�dnd|�}
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}||	@r2tdt|j�|�}|j�|j�|jj||�}q2q2W|dk	r�|�|}||kr�Pn||}q�q�W|j|�n|dkr||}|j| }|j||_|S|j�S(s�Read until a given string is encountered or until timeout.

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        i����(ttimeii�N(tlenRR+tprocess_rawqRtfindRRtPOLLINtPOLLPRItregisterR
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time_starttitpollertpoll_in_or_priority_flagstreadytetelapsedtfdtmodetbuf((s!/usr/lib64/python2.7/telnetlib.pyR'*sP

cCs�t|�}|j�|jj|�}|dkr_||}|j| }|j||_|S|gggf}|}|dk	r�||f}ddlm}|�}	nx�|jr�tj|�|kr�tdt|j�|�}|j	�|j�|jj||�}|dkrJ||}|j| }|j||_|S|dk	r�|�|	}
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cCsO|j�x,|jr8|jr8|j�|j�q
W|j}d|_|S(s�Read at least one byte of cooked data unless EOF is hit.

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cCsE|j�x.|jr:|j�r:|j�|j�q
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cCsO|j�x8|jrD|jrD|j�rD|j�|j�q
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#
cCs|j�|j�S(sProcess and return data that's already in the queues (lazy).

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cCs<|j}d|_|r8|jr8|jr8td�n|S(s�Return any data available in the cooked queue (very lazy).

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R(R(RRD((s!/usr/lib64/python2.7/telnetlib.pytread_sb_data�s		cCs
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RsiisIAC %d not recognizedis	IAC %s %dtDOtDONTtWILLtWONTN(R
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R6R
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		cCsm|jt|j�kr-d|_d|_n|jjd�}|jd|�||_|j||_dS(s�Fill raw queue from exactly one recv() system call.

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�}|s�Pn|j|�q q WdS(s9Interaction function, emulates a very dumb telnet client.twin32Ns(*** Connection closed by remote host ***(tsystplatformtmt_interactRtstdinRKRMtstdoutR&tflushtreadline(Rtrfdtwfdtxfdttexttline((s!/usr/lib64/python2.7/telnetlib.pytinteractIs&
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r,dGHdSX|rFtjj|�qtjj�qWdS(s>Helper for mt_interact() -- this executes in the other thread.s(*** Connection closed by remote host ***N(RKRMR`RdR&Re(Rtdata((s!/usr/lib64/python2.7/telnetlib.pyRois
cCs-|jr|j||�S|j||�SdS(s�Read until one from a list of a regular expressions matches.

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Return a tuple of three items: the index in the list of the
        first regular expression that matches; the match object
        returned; and the text read up till and including the match.

If EOF is read and no text was read, raise EOFError.
        Otherwise, when nothing matches, return (-1, None, text) where
        text is the text received so far (may be the empty string if a
        timeout happened).

If a regular expression ends with a greedy match (e.g. '.*')
        or if more than one expression can match the same input, the
        results are undeterministic, and may depend on the I/O timing.

N(Rt_expect_with_pollt_expect_with_select(RtlistR((s!/usr/lib64/python2.7/telnetlib.pytexpectvs	cCs�d}|}tt|��}xP|D]H}t||d�s&|sTddl}n|j||�||<q&q&W|}|dk	r�ddlm}|�}n|j�d}	xW|D]O}||j|j	�}	|	r�|	j
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Usage: python telnetlib.py [-d] ... [host [port]]

Default host is localhost; default port is 23.

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