mirror of https://github.com/moparisthebest/curl
test1452: add telnet negotiation
Add a basic telnet server for negotiating some telnet options before echoing back any data that's sent to it. Closes #1645
This commit is contained in:
Max Dymond
Daniel Stenberg
parent
efedafe48a
commit
06a6feba9d
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@ -75,6 +75,9 @@ The curl Test Suite
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- TCP/9014 for HTTP pipelining server
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- TCP/9015 for HTTP/2 server
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- TCP/9016 for DICT server
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- TCP/9017 for SMB server
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- TCP/9018 for SMBS server (reserved)
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- TCP/9019 for TELNET server with negotiation support
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1.3 Test servers
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@ -155,7 +155,7 @@ test1424 test1425 test1426 \
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test1428 test1429 test1430 test1431 test1432 test1433 test1434 test1435 \
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test1436 test1437 test1438 test1439 test1440 test1441 test1442 test1443 \
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test1444 test1445 test1446 test1450 test1451 \
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\
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test1452 \
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test1500 test1501 test1502 test1503 test1504 test1505 test1506 test1507 \
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test1508 test1509 test1510 test1511 test1512 test1513 test1514 test1515 \
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test1516 test1517 \
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@ -0,0 +1,41 @@
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<testcase>
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<info>
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<keywords>
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TELNET
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UPLOAD
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</keywords>
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</info>
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#
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# Server-side
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<reply>
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<data>
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</data>
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</reply>
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#
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# Client-side
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<client>
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<server>
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telnet
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</server>
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<features>
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telnet
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</features>
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<name>
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Basic TELNET negotiation
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</name>
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<stdin>
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test1452
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</stdin>
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<command>
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telnet://%HOSTIP:%NEGTELNETPORT --upload-file -
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</command>
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</client>
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#
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# Verify data after the test has been "shot"
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<verify>
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<stdout>test1452</stdout>
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</verify>
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</testcase>
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@ -0,0 +1,349 @@
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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""" A telnet server which negotiates"""
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from __future__ import (absolute_import, division, print_function,
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unicode_literals)
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import argparse
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import os
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import sys
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import logging
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import struct
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try: # Python 2
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import SocketServer as socketserver
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except ImportError: # Python 3
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import socketserver
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log = logging.getLogger(__name__)
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HOST = "localhost"
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IDENT = "NTEL"
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# The strings that indicate the test framework is checking our aliveness
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VERIFIED_REQ = b"verifiedserver"
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VERIFIED_RSP = b"WE ROOLZ: {pid}"
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def telnetserver(options):
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"""
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Starts up a TCP server with a telnet handler and serves DICT requests
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forever.
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"""
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if options.pidfile:
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pid = os.getpid()
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with open(options.pidfile, "w") as f:
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f.write(b"{0}".format(pid))
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local_bind = (HOST, options.port)
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log.info("Listening on %s", local_bind)
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# Need to set the allow_reuse on the class, not on the instance.
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socketserver.TCPServer.allow_reuse_address = True
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server = socketserver.TCPServer(local_bind, NegotiatingTelnetHandler)
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server.serve_forever()
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return ScriptRC.SUCCESS
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class NegotiatingTelnetHandler(socketserver.BaseRequestHandler):
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"""Handler class for Telnet connections.
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"""
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def handle(self):
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"""
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Negotiates options before reading data.
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"""
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neg = Negotiator(self.request)
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try:
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# Send some initial negotiations.
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neg.send_do("NEW_ENVIRON")
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neg.send_will("NEW_ENVIRON")
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neg.send_dont("NAWS")
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neg.send_wont("NAWS")
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# Get the data passed through the negotiator
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data = neg.recv(1024)
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log.debug("Incoming data: %r", data)
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if VERIFIED_REQ in data:
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log.debug("Received verification request from test framework")
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response_data = VERIFIED_RSP.format(pid=os.getpid())
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else:
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log.debug("Received normal request - echoing back")
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response_data = data.strip()
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if response_data:
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log.debug("Sending %r", response_data)
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self.request.sendall(response_data)
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except IOError:
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log.exception("IOError hit during request")
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class Negotiator(object):
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NO_NEG = 0
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START_NEG = 1
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WILL = 2
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WONT = 3
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DO = 4
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DONT = 5
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def __init__(self, tcp):
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self.tcp = tcp
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self.state = self.NO_NEG
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def recv(self, bytes):
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"""
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Read bytes from TCP, handling negotiation sequences
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:param bytes: Number of bytes to read
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:return: a buffer of bytes
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"""
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buffer = bytearray()
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# If we keep receiving negotiation sequences, we won't fill the buffer.
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# Keep looping while we can, and until we have something to give back
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# to the caller.
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while len(buffer) == 0:
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data = self.tcp.recv(bytes)
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if not data:
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# TCP failed to give us any data. Break out.
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break
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for byte in data:
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byte_int = self.byte_to_int(byte)
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if self.state == self.NO_NEG:
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self.no_neg(byte, byte_int, buffer)
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elif self.state == self.START_NEG:
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self.start_neg(byte_int)
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elif self.state in [self.WILL, self.WONT, self.DO, self.DONT]:
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self.handle_option(byte_int)
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else:
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# Received an unexpected byte. Stop negotiations
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log.error("Unexpected byte %s in state %s",
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byte_int,
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self.state)
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self.state = self.NO_NEG
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return buffer
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def byte_to_int(self, byte):
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return struct.unpack(b'B', byte)[0]
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def no_neg(self, byte, byte_int, buffer):
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# Not negotiating anything thus far. Check to see if we
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# should.
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if byte_int == NegTokens.IAC:
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# Start negotiation
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log.debug("Starting negotiation (IAC)")
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self.state = self.START_NEG
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else:
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# Just append the incoming byte to the buffer
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buffer.append(byte)
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def start_neg(self, byte_int):
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# In a negotiation.
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log.debug("In negotiation (%s)",
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NegTokens.from_val(byte_int))
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if byte_int == NegTokens.WILL:
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# Client is confirming they are willing to do an option
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log.debug("Client is willing")
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self.state = self.WILL
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elif byte_int == NegTokens.WONT:
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# Client is confirming they are unwilling to do an
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# option
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log.debug("Client is unwilling")
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self.state = self.WONT
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elif byte_int == NegTokens.DO:
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# Client is indicating they can do an option
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log.debug("Client can do")
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self.state = self.DO
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elif byte_int == NegTokens.DONT:
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# Client is indicating they can't do an option
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log.debug("Client can't do")
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self.state = self.DONT
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else:
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# Received an unexpected byte. Stop negotiations
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log.error("Unexpected byte %s in state %s",
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byte_int,
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self.state)
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self.state = self.NO_NEG
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def handle_option(self, byte_int):
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if byte_int in [NegOptions.BINARY,
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NegOptions.CHARSET,
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NegOptions.SUPPRESS_GO_AHEAD,
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NegOptions.NAWS,
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NegOptions.NEW_ENVIRON]:
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log.debug("Option: %s", NegOptions.from_val(byte_int))
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# No further negotiation of this option needed. Reset the state.
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self.state = self.NO_NEG
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else:
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# Received an unexpected byte. Stop negotiations
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log.error("Unexpected byte %s in state %s",
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byte_int,
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self.state)
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self.state = self.NO_NEG
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def send_message(self, message):
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packed_message = self.pack(message)
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self.tcp.sendall(packed_message)
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def pack(self, arr):
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return struct.pack(b'{0}B'.format(len(arr)), *arr)
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def send_iac(self, arr):
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message = [NegTokens.IAC]
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message.extend(arr)
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self.send_message(message)
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def send_do(self, option_str):
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log.debug("Sending DO %s", option_str)
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self.send_iac([NegTokens.DO, NegOptions.to_val(option_str)])
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def send_dont(self, option_str):
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log.debug("Sending DONT %s", option_str)
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self.send_iac([NegTokens.DONT, NegOptions.to_val(option_str)])
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def send_will(self, option_str):
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log.debug("Sending WILL %s", option_str)
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self.send_iac([NegTokens.WILL, NegOptions.to_val(option_str)])
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def send_wont(self, option_str):
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log.debug("Sending WONT %s", option_str)
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self.send_iac([NegTokens.WONT, NegOptions.to_val(option_str)])
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class NegBase(object):
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@classmethod
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def to_val(cls, name):
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return getattr(cls, name)
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@classmethod
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def from_val(cls, val):
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for k in cls.__dict__.keys():
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if getattr(cls, k) == val:
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return k
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return "<unknown>"
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class NegTokens(NegBase):
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# The start of a negotiation sequence
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IAC = 255
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# Confirm willingness to negotiate
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WILL = 251
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# Confirm unwillingness to negotiate
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WONT = 252
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# Indicate willingness to negotiate
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DO = 253
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# Indicate unwillingness to negotiate
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DONT = 254
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# The start of sub-negotiation options.
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SB = 250
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# The end of sub-negotiation options.
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SE = 240
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class NegOptions(NegBase):
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# Binary Transmission
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BINARY = 0
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# Suppress Go Ahead
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SUPPRESS_GO_AHEAD = 3
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# NAWS - width and height of client
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NAWS = 31
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# NEW-ENVIRON - environment variables on client
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NEW_ENVIRON = 39
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# Charset option
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CHARSET = 42
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def get_options():
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parser = argparse.ArgumentParser()
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parser.add_argument("--port", action="store", default=9019,
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type=int, help="port to listen on")
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parser.add_argument("--verbose", action="store", type=int, default=0,
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help="verbose output")
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parser.add_argument("--pidfile", action="store",
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help="file name for the PID")
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parser.add_argument("--logfile", action="store",
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help="file name for the log")
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parser.add_argument("--srcdir", action="store", help="test directory")
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parser.add_argument("--id", action="store", help="server ID")
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parser.add_argument("--ipv4", action="store_true", default=0,
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help="IPv4 flag")
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return parser.parse_args()
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def setup_logging(options):
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"""
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Set up logging from the command line options
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"""
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root_logger = logging.getLogger()
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add_stdout = False
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formatter = logging.Formatter("%(asctime)s %(levelname)-5.5s "
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"[{ident}] %(message)s"
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.format(ident=IDENT))
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# Write out to a logfile
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if options.logfile:
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handler = logging.FileHandler(options.logfile, mode="w")
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handler.setFormatter(formatter)
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handler.setLevel(logging.DEBUG)
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root_logger.addHandler(handler)
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else:
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# The logfile wasn't specified. Add a stdout logger.
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add_stdout = True
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if options.verbose:
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# Add a stdout logger as well in verbose mode
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root_logger.setLevel(logging.DEBUG)
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add_stdout = True
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else:
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root_logger.setLevel(logging.INFO)
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if add_stdout:
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stdout_handler = logging.StreamHandler(sys.stdout)
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stdout_handler.setFormatter(formatter)
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stdout_handler.setLevel(logging.DEBUG)
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root_logger.addHandler(stdout_handler)
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class ScriptRC(object):
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"""Enum for script return codes"""
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SUCCESS = 0
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FAILURE = 1
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EXCEPTION = 2
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class ScriptException(Exception):
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pass
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if __name__ == '__main__':
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# Get the options from the user.
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options = get_options()
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# Setup logging using the user options
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setup_logging(options)
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# Run main script.
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try:
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rc = telnetserver(options)
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except Exception as e:
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log.exception(e)
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rc = ScriptRC.EXCEPTION
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log.info("Returning %d", rc)
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sys.exit(rc)
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@ -148,6 +148,7 @@ my $HTTP2PORT; # HTTP/2 server port
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my $DICTPORT; # DICT server port
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my $SMBPORT; # SMB server port
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my $SMBSPORT; # SMBS server port
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my $NEGTELNETPORT; # TELNET server port with negotiation
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my $srcdir = $ENV{'srcdir'} || '.';
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my $CURL="../src/curl".exe_ext(); # what curl executable to run on the tests
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@ -382,7 +383,7 @@ sub init_serverpidfile_hash {
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}
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}
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for my $proto (('tftp', 'sftp', 'socks', 'ssh', 'rtsp', 'gopher', 'httptls',
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'dict', 'smb', 'smbs')) {
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'dict', 'smb', 'smbs', 'telnet')) {
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for my $ipvnum ((4, 6)) {
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for my $idnum ((1, 2)) {
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my $serv = servername_id($proto, $ipvnum, $idnum);
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@ -1183,6 +1184,67 @@ sub verifysmb {
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return $pid;
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}
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#######################################################################
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# Verify that the server that runs on $ip, $port is our server. This also
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# implies that we can speak with it, as there might be occasions when the
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# server runs fine but we cannot talk to it ("Failed to connect to ::1: Can't
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# assign requested address")
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#
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sub verifytelnet {
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my ($proto, $ipvnum, $idnum, $ip, $port) = @_;
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my $server = servername_id($proto, $ipvnum, $idnum);
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my $pid = 0;
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my $time=time();
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my $extra="";
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my $verifylog = "$LOGDIR/".
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servername_canon($proto, $ipvnum, $idnum) .'_verify.log';
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unlink($verifylog) if(-f $verifylog);
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my $flags = "--max-time $server_response_maxtime ";
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$flags .= "--silent ";
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$flags .= "--verbose ";
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$flags .= "--globoff ";
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$flags .= "--upload-file - ";
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$flags .= $extra;
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$flags .= "\"$proto://$ip:$port\"";
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my $cmd = "echo 'verifiedserver' | $VCURL $flags 2>$verifylog";
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# check if this is our server running on this port:
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logmsg "RUN: $cmd\n" if($verbose);
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my @data = runclientoutput($cmd);
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my $res = $? >> 8; # rotate the result
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if($res & 128) {
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logmsg "RUN: curl command died with a coredump\n";
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return -1;
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}
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foreach my $line (@data) {
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if($line =~ /WE ROOLZ: (\d+)/) {
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# this is our test server with a known pid!
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$pid = 0+$1;
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last;
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}
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}
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if($pid <= 0 && @data && $data[0]) {
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# this is not a known server
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logmsg "RUN: Unknown server on our $server port: $port\n";
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return 0;
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}
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# we can/should use the time it took to verify the server as a measure
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# on how fast/slow this host is.
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my $took = int(0.5+time()-$time);
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if($verbose) {
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logmsg "RUN: Verifying our test $server server took $took seconds\n";
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}
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return $pid;
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}
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#######################################################################
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# Verify that the server that runs on $ip, $port is our server.
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# Retry over several seconds before giving up. The ssh server in
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@ -1210,7 +1272,8 @@ my %protofunc = ('http' => \&verifyhttp,
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'gopher' => \&verifyhttp,
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'httptls' => \&verifyhttptls,
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'dict' => \&verifyftp,
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'smb' => \&verifysmb);
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'smb' => \&verifysmb,
|
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'telnet' => \&verifytelnet);
|
||||
|
||||
sub verifyserver {
|
||||
my ($proto, $ipvnum, $idnum, $ip, $port) = @_;
|
||||
|
|
@ -2383,6 +2446,82 @@ sub runsmbserver {
|
|||
return ($smbpid, $pid2);
|
||||
}
|
||||
|
||||
#######################################################################
|
||||
# start the telnet server
|
||||
#
|
||||
sub runnegtelnetserver {
|
||||
my ($verbose, $alt, $port) = @_;
|
||||
my $proto = "telnet";
|
||||
my $ip = $HOSTIP;
|
||||
my $ipvnum = 4;
|
||||
my $idnum = 1;
|
||||
my $server;
|
||||
my $srvrname;
|
||||
my $pidfile;
|
||||
my $logfile;
|
||||
my $flags = "";
|
||||
|
||||
if($alt eq "ipv6") {
|
||||
# No IPv6
|
||||
}
|
||||
|
||||
$server = servername_id($proto, $ipvnum, $idnum);
|
||||
|
||||
$pidfile = $serverpidfile{$server};
|
||||
|
||||
# don't retry if the server doesn't work
|
||||
if ($doesntrun{$pidfile}) {
|
||||
return (0,0);
|
||||
}
|
||||
|
||||
my $pid = processexists($pidfile);
|
||||
if($pid > 0) {
|
||||
stopserver($server, "$pid");
|
||||
}
|
||||
unlink($pidfile) if(-f $pidfile);
|
||||
|
||||
$srvrname = servername_str($proto, $ipvnum, $idnum);
|
||||
|
||||
$logfile = server_logfilename($LOGDIR, $proto, $ipvnum, $idnum);
|
||||
|
||||
$flags .= "--verbose 1 " if($debugprotocol);
|
||||
$flags .= "--pidfile \"$pidfile\" --logfile \"$logfile\" ";
|
||||
$flags .= "--id $idnum " if($idnum > 1);
|
||||
$flags .= "--port $port --srcdir \"$srcdir\"";
|
||||
|
||||
my $cmd = "$srcdir/negtelnetserver.py $flags";
|
||||
my ($ntelpid, $pid2) = startnew($cmd, $pidfile, 15, 0);
|
||||
|
||||
if($ntelpid <= 0 || !pidexists($ntelpid)) {
|
||||
# it is NOT alive
|
||||
logmsg "RUN: failed to start the $srvrname server\n";
|
||||
stopserver($server, "$pid2");
|
||||
displaylogs($testnumcheck);
|
||||
$doesntrun{$pidfile} = 1;
|
||||
return (0,0);
|
||||
}
|
||||
|
||||
# Server is up. Verify that we can speak to it.
|
||||
my $pid3 = verifyserver($proto, $ipvnum, $idnum, $ip, $port);
|
||||
if(!$pid3) {
|
||||
logmsg "RUN: $srvrname server failed verification\n";
|
||||
# failed to talk to it properly. Kill the server and return failure
|
||||
stopserver($server, "$ntelpid $pid2");
|
||||
displaylogs($testnumcheck);
|
||||
$doesntrun{$pidfile} = 1;
|
||||
return (0,0);
|
||||
}
|
||||
$pid2 = $pid3;
|
||||
|
||||
if($verbose) {
|
||||
logmsg "RUN: $srvrname server is now running PID $ntelpid\n";
|
||||
}
|
||||
|
||||
sleep(1);
|
||||
|
||||
return ($ntelpid, $pid2);
|
||||
}
|
||||
|
||||
|
||||
#######################################################################
|
||||
# Single shot http and gopher server responsiveness test. This should only
|
||||
|
|
@ -2987,6 +3126,8 @@ sub subVariables {
|
|||
$$thing =~ s/%SMBPORT/$SMBPORT/g;
|
||||
$$thing =~ s/%SMBSPORT/$SMBSPORT/g;
|
||||
|
||||
$$thing =~ s/%NEGTELNETPORT/$NEGTELNETPORT/g;
|
||||
|
||||
# server Unix domain socket paths
|
||||
|
||||
$$thing =~ s/%HTTPUNIXPATH/$HTTPUNIXPATH/g;
|
||||
|
|
@ -4860,6 +5001,19 @@ sub startservers {
|
|||
$run{'dict'}="$pid $pid2";
|
||||
}
|
||||
}
|
||||
elsif($what eq "telnet") {
|
||||
if(!$run{'telnet'}) {
|
||||
($pid, $pid2) = runnegtelnetserver($verbose,
|
||||
"",
|
||||
$NEGTELNETPORT);
|
||||
if($pid <= 0) {
|
||||
return "failed starting neg TELNET server";
|
||||
}
|
||||
logmsg sprintf ("* pid neg TELNET => %d %d\n", $pid, $pid2)
|
||||
if($verbose);
|
||||
$run{'dict'}="$pid $pid2";
|
||||
}
|
||||
}
|
||||
elsif($what eq "none") {
|
||||
logmsg "* starts no server\n" if ($verbose);
|
||||
}
|
||||
|
|
@ -5322,6 +5476,7 @@ $HTTP2PORT = $base++; # HTTP/2 port
|
|||
$DICTPORT = $base++; # DICT port
|
||||
$SMBPORT = $base++; # SMB port
|
||||
$SMBSPORT = $base++; # SMBS port
|
||||
$NEGTELNETPORT = $base++; # TELNET port with negotiation
|
||||
$HTTPUNIXPATH = 'http.sock'; # HTTP server Unix domain socket path
|
||||
|
||||
#######################################################################
|
||||
|
|
|
|||
|
|
@ -105,7 +105,7 @@ sub servername_str {
|
|||
|
||||
$proto = uc($proto) if($proto);
|
||||
die "unsupported protocol: '$proto'" unless($proto &&
|
||||
($proto =~ /^(((FTP|HTTP|HTTP\/2|IMAP|POP3|SMTP|HTTP-PIPE)S?)|(TFTP|SFTP|SOCKS|SSH|RTSP|GOPHER|HTTPTLS|DICT|SMB|SMBS))$/));
|
||||
($proto =~ /^(((FTP|HTTP|HTTP\/2|IMAP|POP3|SMTP|HTTP-PIPE)S?)|(TFTP|SFTP|SOCKS|SSH|RTSP|GOPHER|HTTPTLS|DICT|SMB|SMBS|TELNET))$/));
|
||||
|
||||
$ipver = (not $ipver) ? 'ipv4' : lc($ipver);
|
||||
die "unsupported IP version: '$ipver'" unless($ipver &&
|
||||
|
|
|
|||
Loading…
Reference in New Issue