mdw@git.distorted.org.uk Git - mLib-python/blob - ident.pyx

   1 ### -*-pyrex-*-
   2 ###
   3 ### Ident client
   4 ###
   5 ### (c) 2005 Straylight/Edgeware
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This file is part of the Python interface to mLib.
  11 ###
  12 ### mLib/Python is free software; you can redistribute it and/or modify
  13 ### it under the terms of the GNU General Public License as published by
  14 ### the Free Software Foundation; either version 2 of the License, or
  15 ### (at your option) any later version.
  16 ###
  17 ### mLib/Python is distributed in the hope that it will be useful,
  18 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ### GNU General Public License for more details.
  21 ###
  22 ### You should have received a copy of the GNU General Public License
  23 ### along with mLib/Python; if not, write to the Free Software Foundation,
  24 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25
  26 import socket
  27
  28 cdef _inaddr_frompy(sockaddr_in *sin, addr):
  29   cdef int port
  30   if len(addr) != 2:
  31     raise TypeError, 'want address/port pair'
  32   a = addr[0]
  33   if not inet_aton(a, &sin.sin_addr):
  34     raise TypeError, 'bad IP address'
  35   port = addr[1]
  36   if not (0 <= port < 65536):
  37     raise TypeError, 'port number out of range'
  38   sin.sin_port = htons(port)
  39
  40 cdef _inaddr_topy(sockaddr_in *sin):
  41   return inet_ntoa(sin.sin_addr), ntohs(sin.sin_port)
  42
  43 cdef class SelIdentify:
  44   cdef ident_request irq
  45   cdef int _activep
  46   cdef readonly localaddr
  47   cdef readonly remoteaddr
  48   cdef _user
  49   cdef _bad
  50   cdef _error
  51   cdef _bogus
  52   def __cinit__(me, sk, userproc = None, bogusproc = None,
  53                 badproc = None, errorproc = None, *hunoz, **hukairz):
  54     cdef sockaddr_in s_in, s_out
  55     cdef socklen_t sz_in, sz_out
  56     cdef int fd
  57     if typecheck(sk, socket.SocketType):
  58       fd = sk.fileno()
  59       sz_in = PSIZEOF(&s_in)
  60       sz_out = PSIZEOF(&s_out)
  61       if getsockname(fd, <sockaddr *>&s_in, &sz_in) or \
  62          getpeername(fd, <sockaddr *>&s_out, &sz_out):
  63         _oserror()
  64       if s_in.sin_family != AF_INET or s_out.sin_family != AF_INET:
  65         raise TypeError, 'must be internet socket'
  66     elif len(sk) != 2:
  67       raise TypeError, 'want pair of addresses'
  68     else:
  69       _inaddr_frompy(&s_in, sk[0])
  70       _inaddr_frompy(&s_out, sk[1])
  71     ident(&me.irq, &_sel, &s_in, &s_out, _identfunc, <void *>me)
  72     me.localaddr = _inaddr_topy(&s_in)
  73     me.remoteaddr = _inaddr_topy(&s_out)
  74     me._activep = 1
  75     me._user = _checkcallable(userproc, 'user proc')
  76     me._bad = _checkcallable(badproc, 'bad proc')
  77     me._error = _checkcallable(errorproc, 'error proc')
  78     me._bogus = _checkcallable(bogusproc, 'bogus proc')
  79   def __dealloc__(me):
  80     if me._activep:
  81       ident_abort(&me.irq)
  82   property activep:
  83     def __get__(me):
  84       return _tobool(me._activep)
  85   property userproc:
  86     def __get__(me):
  87       return me._user
  88     def __set__(me, proc):
  89       me._user = _checkcallable(proc, 'user proc')
  90     def __del__(me):
  91       me._user = None
  92   property badproc:
  93     def __get__(me):
  94       return me._bad
  95     def __set__(me, proc):
  96       me._bad = _checkcallable(proc, 'bad proc')
  97     def __del__(me):
  98       me._bad = None
  99   property errorproc:
 100     def __get__(me):
 101       return me._error
 102     def __set__(me, proc):
 103       me._error = _checkcallable(proc, 'error proc')
 104     def __del__(me):
 105       me._error = None
 106   property bogusproc:
 107     def __get__(me):
 108       return me._bogus
 109     def __set__(me, proc):
 110       me._bogus = _checkcallable(proc, 'bogus proc')
 111     def __del__(me):
 112       me._bogus = None
 113   def kill(me):
 114     if not me._activep:
 115       raise ValueError, 'already disabled'
 116     ident_abort(&me.irq)
 117     me._dead()
 118   def _dead(me):
 119     me._activep = 0
 120     me.dead()
 121   def dead(me):
 122     pass
 123   def user(me, os, user):
 124     return _maybecall(me._user, (os, user))
 125   def bad(me):
 126     if me._bad is not None:
 127       return me._bad()
 128     return me.bogus()
 129   def error(me, error):
 130     if me._error is not None:
 131       return me._error(error)
 132     return me.bogus()
 133   def bogus(me):
 134     return _maybecall(me._bogus, ())
 135
 136 cdef void _identfunc(ident_reply *i, void *arg):
 137   cdef SelIdentify id
 138   id = <SelIdentify>arg
 139   id._dead()
 140   if i.type == IDENT_BAD:
 141     id.bad()
 142   elif i.type == IDENT_ERROR:
 143     id.error(i.u.error)
 144   elif i.type == IDENT_USERID:
 145     id.user(i.u.userid.os, i.u.userid.user)
 146
 147 ###----- That's all, folks --------------------------------------------------