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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(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 d � Z d d � Z d d � Z d d � Z d d � Z 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. With a hostname argument, it connects the instance; port number 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. The optional second argument is the port number, which 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. If extra arguments are present, they are substituted in the message using the standard string formatting operator. r zTelnet(%s,%s):�end� N)rK �printrL rM )rY �msg�argsrZ rZ r[ rd � s z Telnet.msgc C s | | _ d S)zhSet the debug level. The higher it is, the more debug output you get (on sys.stdout). 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 Telnet.filenoc C sF t | k r" | j t t t � } | j d | � | j j | � d S)z�Write a string to the socket, doubling any IAC characters. Can block if the connection is blocked. May raise OSError if the connection is closed. 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. When no match is found, return whatever is available instead, 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� EVENT_READrS �select�max� fill_rawq�read_very_lazy)rY �matchrN �n�i�buf�deadline�selectorrZ rZ r[ � read_until$ s8 zTelnet.read_untilc C sD | j � x! | j s- | j � | j � q W| j } d | _ | S)z7Read all data until EOF; block until connection closed.rI )ro rS rx rR )rY r} rZ rZ r[ �read_allI s zTelnet.read_allc C sO | j � x, | j r8 | j r8 | j � | j � q W| j } d | _ | S)z�Read at least one byte of cooked data unless EOF is hit. Return b'' if EOF is hit. Block if no data is immediately available. rI )ro rR rS rx )rY r} rZ rZ r[ � read_someS s zTelnet.read_somec C sE | j � x. | j r: | j � r: | j � | j � q W| j � S)a Read everything that's possible without blocking in I/O (eager). Raise EOFError if connection closed and no cooked data available. Return b'' if no cooked data available otherwise. Don't block unless in the midst of an IAC sequence. )ro rS � sock_availrx ry )rY rZ rZ r[ �read_very_eagerb s zTelnet.read_very_eagerc C sO | j � x8 | j rD | j rD | j � rD | j � | j � q W| j � S)z�Read readily available data. Raise EOFError if connection closed and no cooked data available. Return b'' if no cooked data available otherwise. Don't block unless in the midst of an IAC sequence. )ro rR rS r� rx ry )rY rZ rZ r[ � read_eagerp s # zTelnet.read_eagerc C s | j � | j � S)a Process and return data that's already in the queues (lazy). Raise EOFError if connection closed and no data available. Return b'' if no cooked data available otherwise. Don't block 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). Raise EOFError if connection closed and no data available. Return b'' if no cooked data available otherwise. Don't block. 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. Return b'' if no SB ... SE available. Should only be called 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 f k r� | j | 7_ q d | _ | t k r� | | j | | | j <q�| t k rd | _ d | _ n3 | t k rMd | _ | j | d | _ d | d <| j ro| j | j | t � q�| j d t | � � q t | j � d k r | j d d � } d | _ | } | t t f k r:| j d | t k r�d p�d t | � � | j r | j | j | | � q�| j j t t | � q | t t f k r | j d | t k rgd pjd t | � � | j r�| j | j | | � q | j j t t | � q WWn$ t k r�d | _ d | _ Yn X| j | d | _ | j | d | _ d S) z�Transfer from raw queue to cooked queue. Set self.eof when connection is closed. Don't block unless in the midst of an IAC sequence. 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 " " 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. Block if no data is immediately available. Raise EOFError 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. Block if no data is immediately available. Set self.eof when connection is closed. rI r �2 zrecv %rN)rQ rn rP rO Zrecvrd rS )rY r} rZ rZ r[ rx s zTelnet.fill_rawqc 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 � } Wn t k r� t d � d SYn X| r t j j | j d � � t j j � qb | j t j k rb t j j � j d � } | sd S| j | � qb WqU WWd QRXd S)z9Interaction function, emulates a very dumb telnet client.�win32Nz(*** Connection closed by remote host ***�ascii)�sys�platform� mt_interactrr rs rt ru �stdinrv Zfileobjr� r� rc �stdoutrm �decode�flush�readline�encode)rY r �keyZevents�text�linerZ rZ r[ �interact s, zTelnet.interactc C sV d d l } | j | j f � x0 t j j � } | s8 P| j | j d � � q" Wd S)z$Multithreaded version of interact().r Nr� )�_thread�start_new_thread�listenerr� r� r� rm r� )rY r� r� rZ rZ r[ r� 1 s zTelnet.mt_interactc C sm xf y | j � } Wn t k r5 t d � d SYn X| rX t j j | j d � � q t j j � q Wd S)z>Helper for mt_interact() -- this executes in the other thread.z(*** Connection closed by remote host ***Nr� )r� r� rc r� r� rm r� r� )rY �datarZ rZ r[ r� ; s zTelnet.listenerc C s� d } | d d � } t t | � � } xJ | D]B } t | | d � s/ | sZ d d l } | j | | � | | <q/ W| d k r� t � | } t � �� } | j | t j � x� | j s�| j � xl | D]d } | | j | j � } | r� | j � } | j d | � } | j | d � | _ | | | f Sq� W| d k rs| j | � } | t � } | ss| d k r� Pn q� | j � q� WWd QRX| j � } | r�| j r�t � d d | f S)a� Read until one from a list of a regular expressions matches. The first argument is a list of regular expressions, either compiled (re.RegexObject instances) or uncompiled (strings). The optional second argument is a timeout, in seconds; default is no timeout. Return a tuple of three items: the index in the list of the first regular expression that matches; the match object returned; and the text read up till and including the match. If EOF is read and no text was read, raise EOFError. Otherwise, when nothing matches, return (-1, None, text) where text is the text received so far (may be the empty string if a timeout happened). If a regular expression ends with a greedy match (e.g. '.*') or if more than one expression can match the same input, the results are undeterministic, and may depend on the I/O timing. N�searchr r ���)�rangern �hasattr�re�compilerq rr rs rt ru rS ro r� rR ra rv rx ry r� ) rY �listrN r� �indicesr| r~ r �m�er� ZreadyrZ rZ r[ �expectH sB z Telnet.expect) �__name__� __module__� __qualname__�__doc__r^ Z_GLOBAL_DEFAULT_TIMEOUTr\ rX r` rd rf r_ rg rh rm r� r� r� r� r� r� ry r� r� ro r� rx r� r� r� r� r� rZ rZ rZ r[ r � s8 5 % H c C s d } x> t j d d � rF t j d d k rF | d } t j d =q Wd } t j d d � rm t j d } d } t j d d � r� t j d } y t | � } Wn$ t k r� t j | d � } Yn Xt � } | j | � | j | | d d �| j � | j � d S) z�Test program for telnetlib. Usage: python telnetlib.py [-d] ... [host [port]] Default host is localhost; default port is 23. r r Nz-dZ localhostr ZtcprN g �?) r� �argv�int� ValueErrorr^ Z getservbynamer rf rX r� r_ )rK rL rM ZportstrZtnrZ rZ r[ �test� s& ) r� �__main__)Zr� r� r^ rt Ztimer rq �__all__rJ r] �bytesri r� r� r� r� r� r� ZNOPZDMZBRKZIPZAOZAYTZECZELZGAr� ZBINARYZECHOZRCPZSGAZNAMSZSTATUSZTMZRCTEZNAOLZNAOPZNAOCRDZNAOHTSZNAOHTDZNAOFFDZNAOVTSZNAOVTDZNAOLFDZXASCIIZLOGOUTZBMZDETZSUPDUPZ SUPDUPOUTPUTZSNDLOCZTTYPEZEORZTUIDZOUTMRKZTTYLOCZ VT3270REGIMEZX3PADZNAWSZTSPEEDZLFLOWZLINEMODEZXDISPLOCZ OLD_ENVIRONZAUTHENTICATIONZENCRYPTZ NEW_ENVIRONZTN3270EZXAUTH�CHARSETZRSPZCOM_PORT_OPTIONZSUPPRESS_LOCAL_ECHOZTLSZKERMITZSEND_URLZ FORWARD_XZ PRAGMA_LOGONZ SSPI_LOGONZPRAGMA_HEARTBEATZEXOPLr� r� rH rr ZSelectSelectorr r� r� rZ rZ rZ r[ �<module> s� � �
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