1# -*- coding: utf-8 -*- 2''' 3 ubmodule-tst.py: 4 5 Authors: Zdenek Vasicek (vasicek AT fit.vutbr.cz) 6 Marek Vavrusa (xvavru00 AT stud.fit.vutbr.cz) 7 8 Copyright (c) 2008. All rights reserved. 9 10 This software is open source. 11 12 Redistribution and use in source and binary forms, with or without 13 modification, are permitted provided that the following conditions 14 are met: 15 16 Redistributions of source code must retain the above copyright notice, 17 this list of conditions and the following disclaimer. 18 19 Redistributions in binary form must reproduce the above copyright notice, 20 this list of conditions and the following disclaimer in the documentation 21 and/or other materials provided with the distribution. 22 23 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE 27 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 POSSIBILITY OF SUCH DAMAGE. 34''' 35def init(id, cfg): 36 log_info("pythonmod: init called, module id is %d port: %d script: %s" % (id, cfg.port, mod_env['script'])) 37 return True 38 39def deinit(id): 40 log_info("pythonmod: deinit called, module id is %d" % id) 41 return True 42 43def inform_super(id, qstate, superqstate, qdata): 44 return True 45 46def setTTL(qstate, ttl): 47 """Sets return_msg TTL and all the RRs TTL""" 48 if qstate.return_msg: 49 qstate.return_msg.rep.ttl = ttl 50 if (qstate.return_msg.rep): 51 for i in range(0,qstate.return_msg.rep.rrset_count): 52 d = qstate.return_msg.rep.rrsets[i].entry.data 53 for j in range(0,d.count+d.rrsig_count): 54 d.rr_ttl[j] = ttl 55 56def dataHex(data, prefix=""): 57 res = "" 58 for i in range(0, int((len(data)+15)/16)): 59 res += "%s0x%02X | " % (prefix, i*16) 60 if type(data[0]) == type(1): 61 d = map(lambda x:int(x), data[i*16:i*16+17]) 62 else: 63 d = map(lambda x:ord(x), data[i*16:i*16+17]) 64 for ch in d: 65 res += "%02X " % ch 66 for i in range(0,17-len(data[i*16:i*16+17])): 67 res += " " 68 res += "| " 69 for ch in d: 70 if (ch < 32) or (ch > 127): 71 res += ". " 72 else: 73 res += "%c " % ch 74 res += "\n" 75 return res 76 77def printReturnMsg(qstate): 78 print("Return MSG rep :: flags: %04X, QDcount: %d, Security:%d, TTL=%d" % (qstate.return_msg.rep.flags, qstate.return_msg.rep.qdcount,qstate.return_msg.rep.security, qstate.return_msg.rep.ttl)) 79 print(" qinfo :: qname:",qstate.return_msg.qinfo.qname_list, qstate.return_msg.qinfo.qname_str, "type:",qstate.return_msg.qinfo.qtype_str, "class:",qstate.return_msg.qinfo.qclass_str) 80 if (qstate.return_msg.rep): 81 print("RRSets:",qstate.return_msg.rep.rrset_count) 82 prevkey = None 83 for i in range(0,qstate.return_msg.rep.rrset_count): 84 r = qstate.return_msg.rep.rrsets[i] 85 rk = r.rk 86 print(i,":",rk.dname_list, rk.dname_str, "flags: %04X" % rk.flags) 87 print("type:",rk.type_str,"(%d)" % ntohs(rk.type), "class:",rk.rrset_class_str,"(%d)" % ntohs(rk.rrset_class)) 88 89 d = r.entry.data 90 print(" RRDatas:",d.count+d.rrsig_count) 91 for j in range(0,d.count+d.rrsig_count): 92 print(" ",j,":","TTL=",d.rr_ttl[j],"RR data:") 93 print(dataHex(d.rr_data[j]," ")) 94 95def operate(id, event, qstate, qdata): 96 log_info("pythonmod: operate called, id: %d, event:%s" % (id, strmodulevent(event))) 97 #print("pythonmod: per query data", qdata) 98 99 print("Query:", qstate.qinfo.qname, qstate.qinfo.qname_list, qstate.qinfo.qname_str) 100 print("Type:",qstate.qinfo.qtype_str,"(%d)" % qstate.qinfo.qtype) 101 print("Class:",qstate.qinfo.qclass_str,"(%d)" % qstate.qinfo.qclass) 102 print("") 103 104 # TEST: 105 # > dig @127.0.0.1 www.seznam.cz A 106 # > dig @127.0.0.1 3.76.75.77.in-addr.arpa. PTR 107 # prvni dva dotazy vrati TTL 100 108 # > dig @127.0.0.1 www.seznam.cz A 109 # > dig @127.0.0.1 3.76.75.77.in-addr.arpa. PTR 110 # dalsi dva dotazy vrati TTL 10, ktere se bude s dalsimi dotazy snizovat, nez vyprsi a znovu se zaktivuje mesh 111 112 if qstate.return_msg: 113 printReturnMsg(qstate) 114 115 #qdn = '.'.join(qstate.qinfo.qname_list) 116 qdn = qstate.qinfo.qname_str 117 118 #Pokud dotaz konci na nasledujici, pozmenime TTL zpravy, ktera se posle klientovi (return_msg) i zpravy v CACHE 119 if qdn.endswith(".seznam.cz.") or qdn.endswith('.in-addr.arpa.'): 120 #pokud je v cache odpoved z iteratoru, pak ji zneplatnime, jinak se moduly nazavolaji do te doby, nez vyprsi TTL 121 invalidateQueryInCache(qstate, qstate.return_msg.qinfo) 122 123 if (qstate.return_msg.rep.authoritative): 124 print("X"*300) 125 126 setTTL(qstate, 10) #do cache nastavime TTL na 10 127 if not storeQueryInCache(qstate, qstate.return_msg.qinfo, qstate.return_msg.rep, 0): 128 qstate.ext_state[id] = MODULE_ERROR 129 return False 130 131 setTTL(qstate, 100) #odpoved klientovi prijde s TTL 100 132 qstate.return_rcode = RCODE_NOERROR 133 134 if event == MODULE_EVENT_NEW: 135 qstate.ext_state[id] = MODULE_WAIT_MODULE 136 return True 137 138 if event == MODULE_EVENT_MODDONE: 139 log_info("pythonmod: previous module done") 140 qstate.ext_state[id] = MODULE_FINISHED 141 return True 142 143 if event == MODULE_EVENT_PASS: 144 log_info("pythonmod: event_pass") 145 qstate.ext_state[id] = MODULE_WAIT_MODULE 146 return True 147 148 log_err("pythonmod: BAD event") 149 qstate.ext_state[id] = MODULE_ERROR 150 return True 151 152log_info("pythonmod: script loaded.") 153