slc¶
Special Line Character support for Telnet Linemode Option (RFC 1184).
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class
SLC
(mask=b'x03', value=b'x00')[source]¶ Bases:
object
Defines the willingness to support a Special Linemode Character.
Defined by its SLC support level,
mask
and default keyboard ASCII bytevalue
(may be negotiated by client).-
level
¶ Returns SLC level of support.
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nosupport
¶ Returns True if SLC level is SLC_NOSUPPORT.
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cantchange
¶ Returns True if SLC level is SLC_CANTCHANGE.
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variable
¶ Returns True if SLC level is SLC_VARIABLE.
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default
¶ Returns True if SLC level is SLC_DEFAULT.
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ack
¶ Returns True if SLC_ACK bit is set.
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flushin
¶ Returns True if SLC_FLUSHIN bit is set.
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flushout
¶ Returns True if SLC_FLUSHIN bit is set.
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class
SLC
(mask=b'x03', value=b'x00')[source] Bases:
object
Defines the willingness to support a Special Linemode Character.
Defined by its SLC support level,
mask
and default keyboard ASCII bytevalue
(may be negotiated by client).-
level
Returns SLC level of support.
-
nosupport
Returns True if SLC level is SLC_NOSUPPORT.
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cantchange
Returns True if SLC level is SLC_CANTCHANGE.
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variable
Returns True if SLC level is SLC_VARIABLE.
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default
Returns True if SLC level is SLC_DEFAULT.
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ack
Returns True if SLC_ACK bit is set.
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flushin
Returns True if SLC_FLUSHIN bit is set.
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flushout
Returns True if SLC_FLUSHIN bit is set.
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set_value
(value)[source] Set SLC keyboard ascii value to
byte
.
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set_mask
(mask)[source] Set SLC option mask,
mask
.
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set_flag
(flag)[source] Set SLC option flag,
flag
.
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class
SLC_nosupport
[source]¶ Bases:
telnetlib3.slc.SLC
SLC definition inferring our unwillingness to support the option.
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ack
¶ Returns True if SLC_ACK bit is set.
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cantchange
¶ Returns True if SLC level is SLC_CANTCHANGE.
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default
¶ Returns True if SLC level is SLC_DEFAULT.
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flushin
¶ Returns True if SLC_FLUSHIN bit is set.
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flushout
¶ Returns True if SLC_FLUSHIN bit is set.
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level
¶ Returns SLC level of support.
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nosupport
¶ Returns True if SLC level is SLC_NOSUPPORT.
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set_flag
(flag)¶ Set SLC option flag,
flag
.
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set_mask
(mask)¶ Set SLC option mask,
mask
.
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set_value
(value)¶ Set SLC keyboard ascii value to
byte
.
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variable
¶ Returns True if SLC level is SLC_VARIABLE.
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generate_slctab
(tabset={b'\x01': <telnetlib3.slc.SLC object>, b'\x02': <telnetlib3.slc.SLC object>, b'\x03': <telnetlib3.slc.SLC object>, b'\x04': <telnetlib3.slc.SLC object>, b'\x05': <telnetlib3.slc.SLC object>, b'\x06': <telnetlib3.slc.SLC object>, b'\x07': <telnetlib3.slc.SLC object>, b'\x08': <telnetlib3.slc.SLC object>, b'\t': <telnetlib3.slc.SLC object>, b'\n': <telnetlib3.slc.SLC object>, b'\x0b': <telnetlib3.slc.SLC object>, b'\x0c': <telnetlib3.slc.SLC object>, b'\r': <telnetlib3.slc.SLC object>, b'\x0e': <telnetlib3.slc.SLC object>, b'\x0f': <telnetlib3.slc.SLC object>, b'\x10': <telnetlib3.slc.SLC object>, b'\x11': <telnetlib3.slc.SLC_nosupport object>, b'\x12': <telnetlib3.slc.SLC_nosupport object>})[source]¶ Returns full ‘SLC Tab’ for definitions found using
tabset
. Functions not listed intabset
are set as SLC_NOSUPPORT.
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generate_forwardmask
(binary_mode, tabset, ack=False)[source]¶ Generate a
Forwardmask
instance.Generate a 32-byte (
binary_mode
is True) or 16-byte (False) Forwardmask instance appropriate for the specifiedslctab
. A Forwardmask is formed by a bitmask of all 256 possible 8-bit keyboard ascii input, or, when not ‘outbinary’, a 16-byte 7-bit representation of each value, and whether or not they should be “forwarded” by the client on the transport stream
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snoop
(byte, slctab, slc_callbacks)[source]¶ Scan
slctab
for matchingbyte
values.Returns (callback, func_byte, slc_definition) on match. Otherwise, (None, None, None). If no callback is assigned, the value of callback is always None.
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class
Linemode
(mask=b'x00')[source]¶ Bases:
object
A mask of
LMODE_MODE_LOCAL
means that all line editing is performed on the client side (default). A mask of theNULL () indicates that editing is performed on the remote side. Valid bit flags of mask are:LMODE_MODE_TRAPSIG
,LMODE_MODE_ACK
,LMODE_MODE_SOFT_TAB
, andLMODE_MODE_LIT_ECHO
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local
¶ True if linemode is local.
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remote
¶ True if linemode is remote.
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trapsig
¶ True if signals are trapped by client.
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ack
¶ Returns True if mode has been acknowledged.
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soft_tab
¶ Returns True if client will expand horizontal tab ( ).
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lit_echo
¶ Returns True if non-printable characters are displayed as-is.
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