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Added telnet option ECHO, so that server can request no local echo on client. Related with feature request #540

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Duarte Cordeiro 2014-09-18 14:53:34 +01:00
parent 9ed8e92c71
commit efd2eeafb8
2 changed files with 19 additions and 5 deletions
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18
src/server/portal/telnet.py
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@ -8,7 +8,7 @@ sessions etc.
"""
import re
from twisted.conch.telnet import Telnet, StatefulTelnetProtocol, IAC, LINEMODE, GA
from twisted.conch.telnet import Telnet, StatefulTelnetProtocol, IAC, LINEMODE, GA, WILL, WONT, ECHO
from src.server.session import Session
from src.server.portal import ttype, mssp, msdp, naws
from src.server.portal.mccp import Mccp, mccp_compress, MCCP
@ -87,16 +87,19 @@ class TelnetProtocol(Telnet, StatefulTelnetProtocol, Session):
"""
Call to allow the activation of options for this protocol
"""
return option == MCCP
return (option == MCCP or option==ECHO)
def disableLocal(self, option):
"""
Disable a given option
"""
if option == ECHO:
return True
if option == MCCP:
self.mccp.no_mccp(option)
return True
else:
return super(TelnetProtocol, self).disableLocal(option)
def connectionLost(self, reason):
@ -206,7 +209,7 @@ class TelnetProtocol(Telnet, StatefulTelnetProtocol, Session):
not convert them into ansi tokens)
prompt=<string> - supply a prompt text which gets sent without a
newline added to the end
switchecho="on"/"off"
The telnet ttype negotiation flags, if any, are used if no kwargs
are given.
"""
@ -231,7 +234,7 @@ class TelnetProtocol(Telnet, StatefulTelnetProtocol, Session):
raw = kwargs.get("raw", False)
nomarkup = kwargs.get("nomarkup", not (xterm256 or useansi))
prompt = kwargs.get("prompt")
switchecho = kwargs.get("switchecho")
#print "telnet kwargs=%s, message=%s" % (kwargs, text)
#print "xterm256=%s, useansi=%s, raw=%s, nomarkup=%s, init_done=%s" % (xterm256, useansi, raw, nomarkup, ttype.get("init_done"))
if raw:
@ -249,4 +252,9 @@ class TelnetProtocol(Telnet, StatefulTelnetProtocol, Session):
prompt = prompt.replace(IAC, IAC + IAC).replace('\n', '\r\n')
prompt += IAC + GA
self.transport.write(mccp_compress(self, prompt))
if switchecho:
if switchecho == "on":
self.transport.write(mccp_compress(self, IAC+WONT+ECHO))
if switchecho == "off":
self.transport.write(mccp_compress(self, IAC+WILL+ECHO))