mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-09-20 21:16:22 +02:00
455 lines
14 KiB
Python
Executable File
455 lines
14 KiB
Python
Executable File
#!/usr/bin/python
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# TorControl.py -- Python module to interface with Tor Control interface.
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# Copyright 2005 Nick Mathewson -- See LICENSE for licensing information.
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#$Id$
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import socket
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import struct
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import sys
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#__all__ = [ "MSG_TYPE", "" ]
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class _Enum:
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# Helper: define an ordered dense name-to-number 1-1 mapping.
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def __init__(self, start, names):
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self.nameOf = {}
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idx = start
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for name in names:
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setattr(self,name,idx)
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self.nameOf[idx] = name
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idx += 1
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class _Enum2:
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# Helper: define an ordered sparse name-to-number 1-1 mapping.
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def __init__(self, **args):
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self.__dict__.update(args)
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self.nameOf = {}
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for k,v in args.items():
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self.nameOf[v] = k
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# Message types that client or server can send.
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MSG_TYPE = _Enum(0x0000,
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["ERROR",
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"DONE",
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"SETCONF",
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"GETCONF",
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"CONFVALUE",
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"SETEVENTS",
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"EVENT",
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"AUTH",
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"SAVECONF",
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"SIGNAL",
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"MAPADDRESS",
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"GETINFO",
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"INFOVALUE",
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"EXTENDCIRCUIT",
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"ATTACHSTREAM",
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"POSTDESCRIPTOR",
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"FRAGMENTHEADER",
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"FRAGMENT",
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"REDIRECTSTREAM",
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"CLOSESTREAM",
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"CLOSECIRCUIT",
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])
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# Make sure that the enumeration code is working.
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assert MSG_TYPE.SAVECONF == 0x0008
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assert MSG_TYPE.CLOSECIRCUIT == 0x0014
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# Types of "EVENT" message.
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EVENT_TYPE = _Enum(0x0001,
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["CIRCSTATUS",
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"STREAMSTATUS",
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"ORCONNSTATUS",
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"BANDWIDTH",
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"OBSOLETE_LOG",
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"NEWDESC",
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"DEBUG_MSG",
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"INFO_MSG",
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"NOTICE_MSG",
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"WARN_MSG",
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"ERR_MSG",
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])
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assert EVENT_TYPE.ERR_MSG == 0x000B
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assert EVENT_TYPE.OBSOLETE_LOG == 0x0005
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# Status codes for "CIRCSTATUS" events.
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CIRC_STATUS = _Enum(0x00,
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["LAUNCHED",
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"BUILT",
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"EXTENDED",
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"FAILED",
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"CLOSED"])
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# Status codes for "STREAMSTATUS" events
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STREAM_STATUS = _Enum(0x00,
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["SENT_CONNECT",
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"SENT_RESOLVE",
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"SUCCEEDED",
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"FAILED",
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"CLOSED",
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"NEW_CONNECT",
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"NEW_RESOLVE",
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"DETACHED"])
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# Status codes for "ORCONNSTATUS" events
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OR_CONN_STATUS = _Enum(0x00,
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["LAUNCHED","CONNECTED","FAILED","CLOSED"])
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# Signal codes for "SIGNAL" events.
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SIGNAL = _Enum2(HUP=0x01,INT=0x02,USR1=0x0A,USR2=0x0C,TERM=0x0F)
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# Error codes for "ERROR" events.
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ERR_CODES = {
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0x0000 : "Unspecified error",
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0x0001 : "Internal error",
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0x0002 : "Unrecognized message type",
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0x0003 : "Syntax error",
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0x0004 : "Unrecognized configuration key",
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0x0005 : "Invalid configuration value",
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0x0006 : "Unrecognized byte code",
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0x0007 : "Unauthorized",
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0x0008 : "Failed authentication attempt",
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0x0009 : "Resource exhausted",
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0x000A : "No such stream",
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0x000B : "No such circuit",
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0x000C : "No such OR"
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}
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class TorCtlError(Exception):
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"Generic error raised by TorControl code."
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pass
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class ProtocolError(TorCtlError):
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"Raised on violations in Tor controller protocol"
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pass
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class ErrorReply(TorCtlError):
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""
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pass
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def parseHostAndPort(h):
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host, port = "localhost", 9051
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if ":" in h:
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i = h.index(":")
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host = h[:i]
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try:
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port = int(h[i+1:])
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except ValueError:
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print "Bad hostname %r"%h
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sys.exit(1)
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elif h:
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try:
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port = int(h)
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except ValueError:
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host = h
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return host, port
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def _unpack_msg(msg):
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"return None, minLength, body or type,body,rest"
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if len(msg) < 4:
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return None, 4, msg
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length,type = struct.unpack("!HH",msg)
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if len(msg) >= 4+length:
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return type,msg[4:4+length],msg[4+length:]
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else:
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return None,4+length,msg
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def _minLengthToPack(bytes):
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whole,left = divmod(bytes,65535)
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if left:
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return whole*(65535+4)+4+left
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else:
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return whole*(65535+4)
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def unpack_msg(msg):
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"returns as for _unpack_msg"
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tp,body,rest = _unpack_msg(msg)
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if tp != MSG_TYPE.FRAGMENTHEADER:
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return tp, body, rest
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if len(body) < 6:
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raise ProtocolError("FRAGMENTHEADER message too short")
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realType,realLength = struct.unpack("!HL", body[:6])
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# Okay; could the message _possibly_ be here?
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minLength = _minLengthToPack(realLength+6)
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if len(msg) < minLength:
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return None, minLength, msg
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# Okay; optimistically try to build up the msg.
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soFar = [ body[6:] ]
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lenSoFarLen = len(body)-6
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while len(rest)>=4 and lenSoFar < realLength:
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ln, tp = struct.unpack("!HH", rest[:4])
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if tp != MSG_TYPE.FRAGMENT:
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raise ProtocolError("Missing FRAGMENT message")
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soFar.append(rest[4:4+ln])
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lenSoFar += ln
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if 4+ln > len(rest):
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rest = ""
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leftInPacket = 4+ln-len(rest)
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else:
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rest = rest[4+ln:]
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leftInPacket=0
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if lenSoFar == realLength:
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return realType, "".join(soFar), rest
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elif lenSoFar > realLength:
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raise ProtocolError("Bad fragmentation: message longer than declared")
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else:
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inOtherPackets = realLength-lenSoFar-leftInPacket
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minLength = _minLengthToPack(inOtherPackets)
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return None, len(msg)+leftInPacket+inOtherPackets, msg
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def _receive_msg(s):
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body = ""
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header = s.recv(4)
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length,type = struct.unpack("!HH",header)
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if length:
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body = s.recv(length)
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return length,type,body
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def receive_message(s):
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length, tp, body = _receive_msg(s)
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if tp != MSG_TYPE.FRAGMENTHEADER:
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return length, tp, body
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if length < 6:
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raise ProtocolError("FRAGMENTHEADER message too short")
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realType,realLength = struct.unpack("!HL", body[:6])
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data = [ body[6:] ]
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soFar = len(data[0])
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while 1:
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length, tp, body = _receive_msg(s)
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if tp != MSG_TYPE.FRAGMENT:
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raise ProtocolError("Missing FRAGMENT message")
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soFar += length
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data.append(body)
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if soFar == realLength:
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return realLength, realType, "".join(data)
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elif soFar > realLengtH:
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raise ProtocolError("FRAGMENT message too long!")
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_event_handler = None
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def receive_reply(s, expected=None):
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while 1:
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_, tp, body = receive_message(s)
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if tp == MSG_TYPE.EVENT:
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if _event_handler is not None:
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_event_handler(body)
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elif tp == MSG_TYPE.ERROR:
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if len(body)<2:
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raise ProtocolError("(Truncated error message)")
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errCode, = struct.unpack("!H", body[:2])
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raise ErrorReply((errCode,
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ERR_CODES.get(errCode,"[unrecognized]"),
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body[2:]))
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elif (expected is not None) and (tp not in expected):
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raise ProtocolError("Unexpected message type 0x%04x"%tp)
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else:
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return tp, body
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def pack_message(type, body=""):
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length = len(body)
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if length < 65536:
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reqheader = struct.pack("!HH", length, type)
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return "%s%s"%(reqheader,body)
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fragheader = struct.pack("!HHHL",
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65535, MSG_TYPE.FRAGMENTHEADER, type, length)
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msgs = [ fragheader, body[:65535-6] ]
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body = body[65535-6:]
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while body:
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if len(body) > 65535:
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fl = 65535
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else:
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fl = len(body)
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fragheader = struct.pack("!HH", MSG_TYPE.FRAGMENT, fl)
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msgs.append(fragheader)
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msgs.append(body[:fl])
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body = body[fl:]
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return "".join(msgs)
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def send_message(s, type, body=""):
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s.sendall(pack_message(type, body))
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def authenticate(s):
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send_message(s,MSG_TYPE.AUTH)
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type,body = receive_reply(s)
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return
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def _parseKV(body,sep=" ",term="\n"):
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res = []
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for line in body.split(term):
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if not line: continue
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print repr(line)
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k, v = line.split(sep,1)
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res.append((k,v))
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return res
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def get_option(s,name):
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send_message(s,MSG_TYPE.GETCONF,name)
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tp,body = receive_reply(s,[MSG_TYPE.CONFVALUE])
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return _parseKV(body)
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def set_option(s,msg):
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send_message(s,MSG_TYPE.SETCONF,msg)
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tp,body = receive_reply(s,[MSG_TYPE.DONE])
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def get_info(s,name):
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send_message(s,MSG_TYPE.GETINFO,name)
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tp,body = receive_reply(s,[MSG_TYPE.INFOVALUE])
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kvs = body.split("\0")
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d = {}
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for i in xrange(0,len(kvs)-1,2):
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d[kvs[i]] = kvs[i+1]
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return d
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def set_events(s,events):
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send_message(s,MSG_TYPE.SETEVENTS,
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"".join([struct.pack("!H", event) for event in events]))
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type,body = receive_reply(s,[MSG_TYPE.DONE])
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return
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def save_conf(s):
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send_message(s,MSG_TYPE.SAVECONF)
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receive_reply(s,[MSG_TYPE.DONE])
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def send_signal(s, sig):
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send_message(s,MSG_TYPE.SIGNAL,struct.pack("B",sig))
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receive_reply(s,[MSG_TYPE.DONE])
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def map_address(s, kv):
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msg = [ "%s %s\n"%(k,v) for k,v in kv ]
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send_message(s,MSG_TYPE.MAPADDRESS,"".join(msg))
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tp, body = receive_reply(s,[MSG_TYPE.DONE])
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return _parseKV(body)
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def extend_circuit(s, circid, hops):
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msg = struct.pack("!L",circid) + ",".join(hops) + "\0"
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send_message(s,MSG_TYPE.EXTENDCIRCUIT,msg)
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tp, body = receive_reply(s,[MSG_TYPE.DONE])
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if len(body) != 4:
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raise ProtocolError("Extendcircuit reply too short or long")
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return struct.unpack("!L",body)[0]
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def redirect_stream(s, streamid, newtarget):
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msg = struct.pack("!L",streamid) + newtarget + "\0"
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send_message(s,MSG_TYPE.REDIRECTSTREAM,msg)
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tp,body = receive_reply(s,[MSG_TYPE.DONE])
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def attach_stream(s, streamid, circid):
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msg = struct.pack("!LL",streamid, circid)
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send_message(s,MSG_TYPE.ATTACHSTREAM,msg)
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tp,body = receive_reply(s,[MSG_TYPE.DONE])
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def close_stream(s, streamid, reason=0, flags=0):
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msg = struct.pack("!LBB",streamid,reason,flags)
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send_message(s,MSG_TYPE.CLOSESTREAM,msg)
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tp,body = receive_reply(s,[MSG_TYPE.DONE])
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def close_circuit(s, circid, flags=0):
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msg = struct.pack("!LB",circid,flags)
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send_message(s,MSG_TYPE.CLOSECIRCUIT,msg)
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tp,body = receive_reply(s,[MSG_TYPE.DONE])
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def post_descriptor(s, descriptor):
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send_message(s,MSG_TYPE.POSTDESCRIPTOR,descriptor)
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tp,body = receive_reply(s,[MSG_TYPE.DONE])
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def _unterminate(s):
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if s[-1] == '\0':
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return s[:-1]
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else:
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return s
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def unpack_event(body):
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if len(body)<2:
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raise ProtocolError("EVENT body too short.")
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evtype, = struct.unpack("!H", body[:2])
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body = body[2:]
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if evtype == EVENT_TYPE.CIRCSTATUS:
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if len(body)<5:
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raise ProtocolError("CIRCUITSTATUS event too short.")
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status,ident = struct.unpack("!BL", body[:5])
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path = _unterminate(body[5:]).split(",")
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args = status, ident, path
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elif evtype == EVENT_TYPE.STREAMSTATUS:
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if len(body)<5:
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raise ProtocolError("CIRCUITSTATUS event too short.")
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status,ident = struct.unpack("!BL", body[:5])
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target = _unterminate(body[5:])
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args = status, ident, target
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elif evtype == EVENT_TYPE.ORCONNSTATUS:
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if len(body)<2:
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raise ProtocolError("CIRCUITSTATUS event too short.")
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status = ord(body[0])
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target = _unterminate(body[1:])
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args = status, target
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elif evtype == EVENT_TYPE.BANDWIDTH:
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if len(body)<8:
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raise ProtocolError("BANDWIDTH event too short.")
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read, written = struct.unpack("!LL",body[:8])
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args = read, written
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elif evtype == EVENT_TYPE.OBSOLETE_LOG:
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args = (_unterminate(body),)
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elif evtype == EVENT_TYPE.NEWDESC:
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args = (_unterminate(body).split(","),)
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elif EVENT_TYPE.DEBUG_MSG <= evtype <= EVENT_TYPE.ERR_MSG:
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args = (EVENT_TYPE.nameOf(evtype), _unterminate(body))
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else:
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args = (body,)
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return evtype, args
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def listen_for_events(s):
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while(1):
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_,type,body = receive_message(s)
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print unpack_event(body)
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return
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def do_main_loop(host,port):
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print "host is %s:%d"%(host,port)
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect((host,port))
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authenticate(s)
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print "nick",`get_option(s,"nickname")`
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print get_option(s,"DirFetchPeriod\n")
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print `get_info(s,"version")`
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#print `get_info(s,"desc/name/moria1")`
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print `get_info(s,"network-status")`
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print `get_info(s,"addr-mappings/all")`
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print `get_info(s,"addr-mappings/config")`
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print `get_info(s,"addr-mappings/cache")`
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print `get_info(s,"addr-mappings/control")`
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print `map_address(s, [("0.0.0.0", "Foobar.com"),
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("1.2.3.4", "foobaz.com"),
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("frebnitz.com", "5.6.7.8"),
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(".", "abacinator.onion")])`
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print `extend_circuit(s,0,["moria1"])`
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send_signal(s,1)
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#save_conf(s)
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#set_option(s,"1")
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#set_option(s,"bandwidthburstbytes 100000")
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#set_option(s,"runasdaemon 1")
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#set_events(s,[EVENT_TYPE.WARN])
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set_events(s,[EVENT_TYPE.OBSOLETE_LOG])
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listen_for_events(s)
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return
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if __name__ == '__main__':
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if len(sys.argv) != 2:
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print "Syntax: tor-control.py torhost:torport"
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sys.exit(0)
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sh,sp = parseHostAndPort(sys.argv[1])
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do_main_loop(sh,sp)
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