1# -*- coding: utf-8 -*- 2''' 3 calc.py: DNS-based czech-english dictionary 4 5 Copyright (c) 2009, Zdenek Vasicek (vasicek AT fit.vutbr.cz) 6 Marek Vavrusa (xvavru00 AT stud.fit.vutbr.cz) 7 8 This software is open source. 9 10 Redistribution and use in source and binary forms, with or without 11 modification, are permitted provided that the following conditions 12 are met: 13 14 * Redistributions of source code must retain the above copyright notice, 15 this list of conditions and the following disclaimer. 16 17 * Redistributions in binary form must reproduce the above copyright notice, 18 this list of conditions and the following disclaimer in the documentation 19 and/or other materials provided with the distribution. 20 21 * Neither the name of the organization nor the names of its 22 contributors may be used to endorse or promote products derived from this 23 software without specific prior written permission. 24 25 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE 29 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 POSSIBILITY OF SUCH DAMAGE. 36''' 37import os 38cz_dict = {} 39en_dict = {} 40 41def init(id, cfg): 42 log_info("pythonmod: dict init") 43 f = open("examples/dict_data.txt", "r") 44 try: 45 for line in f: 46 if line.startswith('#'): 47 continue 48 itm = line.split("\t", 3) 49 if len(itm) < 2: 50 continue 51 en,cs = itm[0:2] 52 53 if not (cs in cz_dict): 54 cz_dict[cs] = [en] # [cs] = en 55 else: 56 cz_dict[cs].append(en) # [cs] = en 57 58 if not (en in en_dict): 59 en_dict[en] = [cs] # [en] = cs 60 else: 61 en_dict[en].append(cs) # [en] = cs 62 63 finally: 64 f.close() 65 return True 66 67def deinit(id): 68 log_info("pythonmod: dict deinit") 69 return True 70 71def operate(id, event, qstate, qdata): 72 if (event == MODULE_EVENT_NEW) or (event == MODULE_EVENT_PASS): 73 74 if qstate.qinfo.qname_str.endswith("._dict_.cz."): 75 76 aword = ' '.join(qstate.qinfo.qname_list[0:-4]) 77 adict = qstate.qinfo.qname_list[-4] 78 79 log_info("pythonmod: dictionary look up; word:%s dict:%s" % (aword,adict)) 80 81 words = [] 82 if (adict == "en") and (aword in en_dict): 83 words = en_dict[aword] # EN -> CS 84 if (adict == "cs") and (aword in cz_dict): 85 words = cz_dict[aword] # CS -> EN 86 87 if len(words) and ((qstate.qinfo.qtype == RR_TYPE_TXT) or (qstate.qinfo.qtype == RR_TYPE_ANY)): 88 89 msg = DNSMessage(qstate.qinfo.qname_str, RR_TYPE_TXT, RR_CLASS_IN, PKT_RD | PKT_RA | PKT_AA) 90 for w in words: 91 msg.answer.append("%s 300 IN TXT \"%s\"" % (qstate.qinfo.qname_str,w.replace("\"","\\\""))) 92 93 if not msg.set_return_msg(qstate): 94 qstate.ext_state[id] = MODULE_ERROR 95 return True 96 97 qstate.return_rcode = RCODE_NOERROR 98 qstate.ext_state[id] = MODULE_FINISHED 99 return True 100 101 else: 102 qstate.return_rcode = RCODE_SERVFAIL 103 qstate.ext_state[id] = MODULE_FINISHED 104 return True 105 106 else: #Pass on the unknown query to the iterator 107 qstate.ext_state[id] = MODULE_WAIT_MODULE 108 return True 109 110 elif event == MODULE_EVENT_MODDONE: #the iterator has finished 111 #we don't need modify result 112 qstate.ext_state[id] = MODULE_FINISHED 113 return True 114 115 log_err("pythonmod: Unknown event") 116 qstate.ext_state[id] = MODULE_ERROR 117 return True 118 119def inform_super(id, qstate, superqstate, qdata): 120 return True 121 122