| | 1 | ### -*-pyrex-*- |
| | 2 | ### |
| | 3 | ### Background name resolution |
| | 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 | cdef class SelResolve: |
| | 27 | """Abstract superclass for background name resolution.""" |
| | 28 | cdef bres_client r |
| | 29 | cdef int _activep |
| | 30 | cdef _resolved |
| | 31 | cdef _failed |
| | 32 | def __init__(me, *hunoz, **hukairz): |
| | 33 | raise TypeError, 'abstract class' |
| | 34 | def __dealloc__(me): |
| | 35 | if me._activep: |
| | 36 | me._dead() |
| | 37 | bres_abort(&me.r) |
| | 38 | property activep: |
| | 39 | """BR.activep: is lookup still waiting?""" |
| | 40 | def __get__(me): |
| | 41 | return _tobool(me._activep) |
| | 42 | def kill(me): |
| | 43 | """BR.kill(): cancel in-progress lookup""" |
| | 44 | if not me._activep: |
| | 45 | raise ValueError, 'already dead' |
| | 46 | me._dead() |
| | 47 | bres_abort(&me.r) |
| | 48 | return me |
| | 49 | cdef _dead(me): |
| | 50 | me._activep = 0 |
| | 51 | me.dead() |
| | 52 | def dead(me): |
| | 53 | """BR.dead(): called when lookup completes or is cancelled""" |
| | 54 | pass |
| | 55 | property resolvedproc: |
| | 56 | """BR.resolvedproc -> FUNC: call FUNC(NAME, ALIASES, ADDRS) when ok""" |
| | 57 | def __get__(me): |
| | 58 | return me._resolved |
| | 59 | def __set__(me, proc): |
| | 60 | me._resolved = _checkcallable(proc, 'resolved proc') |
| | 61 | def __del__(me): |
| | 62 | me._resolved = None |
| | 63 | property failedproc: |
| | 64 | """BR.failedproc -> FUNC: call FUNC() when lookup fails""" |
| | 65 | def __get__(me): |
| | 66 | return me._failed |
| | 67 | def __set__(me, proc): |
| | 68 | me._failed = _checkcallable(proc, 'failed proc') |
| | 69 | def __del__(me): |
| | 70 | me._failed = None |
| | 71 | def resolved(me, name, aliases, addrs): |
| | 72 | """BR.resolved(NAME, ALIASES, ADDRS): called when lookup completes""" |
| | 73 | return _maybecall(me._resolved, (name, aliases, addrs)) |
| | 74 | def failed(me): |
| | 75 | """BR.failed(): called when lookup fails""" |
| | 76 | return _maybecall(me._failed, ()) |
| | 77 | |
| | 78 | cdef class SelResolveByName (SelResolve): |
| | 79 | """ |
| | 80 | Resolve a hostname to an IP address, asynchronously. |
| | 81 | |
| | 82 | SelResolveByName(NAME, [resolvedproc = None], [failedproc = None]) |
| | 83 | |
| | 84 | Calls RESOLVEDPROC(NAME, ALIASES, ADDRS) on success, or FAILEDPROC() on |
| | 85 | failure. |
| | 86 | """ |
| | 87 | def __cinit__(me, char *name, resolvedproc = None, failedproc = None, |
| | 88 | *hunoz, **hukairz): |
| | 89 | me._resolved = _checkcallable(resolvedproc, 'resolved proc') |
| | 90 | me._failed = _checkcallable(failedproc, 'failed proc') |
| | 91 | me._activep = 1 |
| | 92 | bres_byname(&me.r, name, _resfunc, <void *>me) |
| | 93 | def __init__(me, name, resolvedproc = None, failedproc = None): |
| | 94 | pass |
| | 95 | |
| | 96 | cdef class SelResolveByAddr (SelResolve): |
| | 97 | """ |
| | 98 | Resolve an IPv4 address to a hostname, asynchronously. |
| | 99 | |
| | 100 | SelResolveByAddr(ADDR, [resolvedproc = None], [failedproc = None]) |
| | 101 | |
| | 102 | Calls RESOLVEDPROC(NAME, ALIASES, ADDRS) on success, or FAILEDPROC() on |
| | 103 | failure. |
| | 104 | """ |
| | 105 | def __cinit__(me, char *addr, resolvedproc = None, failedproc = None, |
| | 106 | *hunoz, **hukairz): |
| | 107 | cdef in_addr ia |
| | 108 | if not inet_aton(addr, &ia): |
| | 109 | raise TypeError, 'bad IP address' |
| | 110 | me._resolved = _checkcallable(resolvedproc, 'resolved proc') |
| | 111 | me._failed = _checkcallable(failedproc, 'failed proc') |
| | 112 | me._activep = 1 |
| | 113 | bres_byaddr(&me.r, ia, _resfunc, <void *>me) |
| | 114 | def __init__(me, addr, resolvedproc = None, failedproc = None): |
| | 115 | pass |
| | 116 | |
| | 117 | cdef void _resfunc(hostent *h, void *arg): |
| | 118 | cdef SelResolve r |
| | 119 | cdef int i |
| | 120 | r = <SelResolve>arg |
| | 121 | r._dead() |
| | 122 | if h is NULL: |
| | 123 | r.failed() |
| | 124 | else: |
| | 125 | alias = [] |
| | 126 | addr = [] |
| | 127 | i = 0 |
| | 128 | while h.h_aliases[i]: |
| | 129 | alias.append(h.h_aliases[i]) |
| | 130 | i = i + 1 |
| | 131 | i = 0 |
| | 132 | while h.h_addr_list[i]: |
| | 133 | addr.append(inet_ntoa((<in_addr *>h.h_addr_list[i])[0])) |
| | 134 | i = i + 1 |
| | 135 | r.resolved(h.h_name, alias, addr) |
| | 136 | |
| | 137 | bres_exec(NULL) |
| | 138 | bres_init(&_sel) |
| | 139 | |
| | 140 | ###----- That's all, folks -------------------------------------------------- |
~mdw / mLib-python / blame_incremental