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d g � ZR eS e dI � r�e jT ZU n e jV ZU GdJ d � d � ZW dK dL � ZX eY dM k r�eX � d S)NaQ TELNET client class.
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(b'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 a selector in order to wait until
more data is available. Note that in this case, read_eager() may return b''
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
� N)� monotonic�Telnet� � � � � � �� �� �� �� �� � � � � � � � � � � � � � � � �
� � �
� � � � � � � � � � � � � � � � � � �! �" �# �$ �% �& �' �( �) �* �+ �, �- �. �/ �0 �1 � � � � PollSelectorc @ si e Z d Z d Z d d e j d d � Z d e j d d � Z d d � Z d
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d d � Z d d d � Z d d � Z d d � Z d d � Z d d � Z d d! � Z d" d# � Z d$ d% � Z d& d' � Z d( d) � Z d* d+ � Z d, d- � Z d. d/ � Z d0 d1 � Z d2 d3 � Z d4 d5 � Z d d6 d7 � Z d S)8r a� 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.
Nr c C s� t | _ | | _ | | _ | | _ d | _ d | _ d | _ d | _ d | _ d | _
d | _ d | _ d | _
| d k r� | j | | | � d S)z�Constructor.
When called without arguments, create an unconnected instance.
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and timeout are optional.
N� r )�
DEBUGLEVEL�
debuglevel�host�port�timeout�sock�rawq�irawq�cookedq�eof�iacseq�sb�sbdataq�option_callback�open)�selfrL rM rN � rZ �./opt/alt/python35/lib64/python3.5/telnetlib.py�__init__� s zTelnet.__init__c C sO d | _ | s t } | | _ | | _ | | _ t j | | f | � | _ d S)z�Connect to a host.
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defaults to the standard telnet port (23).
Don't try to reopen an already connected instance.
r N)rS � TELNET_PORTrL rM rN �socketZcreate_connectionrO )rY rL rM rN rZ rZ r[ rX � s z Telnet.openc C s | j � d S)z#Destructor -- close the connection.N)�close)rY rZ rZ r[ �__del__� s zTelnet.__del__c G sT | j d k rP t d | j | j f d d �| rF t | | � n
t | � d S)z�Print a debug message, when the debug level is > 0.
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r zTelnet(%s,%s):�end� N)rK �printrL rM )rY �msg�argsrZ rZ r[ rd � s
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N)rK )rY rK rZ rZ r[ �set_debuglevel� s zTelnet.set_debuglevelc C sA | j } d | _ d | _ d | _ d | _ | r= | j � d S)zClose the connection.NTrI r )rO rS rT rU r_ )rY rO rZ rZ r[ r_ s z Telnet.closec C s | j S)z)Return the socket object used internally.)rO )rY rZ rZ r[ �
get_socket s zTelnet.get_socketc C s
| j j � S)z9Return the fileno() of the socket object used internally.)rO �fileno)rY rZ rZ r[ rh s z
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zsend %rN)�IAC�replacerd rO �sendall)rY �bufferrZ rZ r[ �write s z Telnet.writec C s� t | � } | j � | j j | � } | d k rk | | } | j d | � } | j | d � | _ | S| d k r� t � | } t � �� } | j | t j � x� | j so| j
| � rFt d t | j � | � } | j � | j � | j j | | � } | d k rF| | } | j d | � } | j | d � | _ | S| d k r� | t � } | d k r� Pq� WWd QRX| j
� S)a Read until a given string is encountered or until timeout.
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possibly the empty string. Raise EOFError if the connection
is closed and no cooked data is available.
r N)�len� process_rawqrR �find�_time�_TelnetSelector�register� selectors�
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available.
rI )ro rR rS rx )rY r} rZ rZ r[ � read_someS s
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available. Return b'' if no cooked data available otherwise.
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)ro rS �
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zTelnet.read_very_eagerc C sO | j � x8 | j rD | j rD | j � rD | j � | j � q
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#
zTelnet.read_eagerc C s | j � | j � S)a Process and return data that's already in the queues (lazy).
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unless in the midst of an IAC sequence.
)ro ry )rY rZ rZ r[ � read_lazy~ s
zTelnet.read_lazyc C s< | j } d | _ | r8 | j r8 | j r8 t d � � | S)z�Return any data available in the cooked queue (very lazy).
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rI ztelnet connection closed)rR rS rP �EOFError)rY r} rZ rZ r[ ry � s
zTelnet.read_very_lazyc C s | j } d | _ | S)a Return any data available in the SB ... SE queue.
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after seeing a SB or SE command. When a new SB command is
found, old unread SB data will be discarded. Don't block.
rI )rV )rY r} rZ rZ r[ � read_sb_data� s zTelnet.read_sb_datac C s
| | _ d S)zIProvide a callback function called after each receipt of a telnet option.N)rW )rY �callbackrZ rZ r[ � set_option_negotiation_callback� s z&Telnet.set_option_negotiation_callbackc C s d d g } y�x�| j r�| j � } | j s� | t k r? q | d k rN q | t k rx | | j | | | j <q q�| j | 7_ q t | j � d k r�| t t t t
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rI s r r zIAC %d not recognizedr z IAC %s %d�DO�DONT�WILL�WONTN)rP � rawq_getcharrT �theNULLri rU rn r� r� r� r� �SBrV �SErW rO �NOOPTrd �ordrk r� rR )rY r} �c�cmdZoptrZ rZ r[ ro � sh
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zTelnet.process_rawqc C s} | j s" | j � | j r" t � | j | j | j d � } | j d | _ | j t | j � k ry d | _ d | _ | S)z�Get next char from raw queue.
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when connection is closed.
r rI r )rP rx rS r� rQ rn )rY r� rZ rZ r[ r� � s
zTelnet.rawq_getcharc C sj | j t | j � k r* d | _ d | _ | j j d � } | j d | � | | _ | j | | _ d S)z�Fill raw queue from exactly one recv() system call.
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rI r �2 zrecv %rN)rQ rn rP rO Zrecvrd rS )rY r} rZ rZ r[ rx s
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C s= t � �- } | j | t j � t | j d � � SWd QRXd S)z-Test whether data is available on the socket.r N)rr rs rt ru �boolrv )rY r rZ rZ r[ r� s zTelnet.sock_availc C s3 t j d k r | j � d St � �} | j | t j � | j t j t j � x� x� | j � D]� \ } } | j | k r� y | j
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f S)a� Read until one from a list of a regular expressions matches.
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first regular expression that matches; the match object
returned; and the text read up till and including the match.
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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).
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or if more than one expression can match the same input, the
results are undeterministic, and may depend on the I/O timing.
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