1 # -*- coding: utf-8 -*-
3 ubmodule-msg.py: simple response packet logger
5 Authors: Zdenek Vasicek (vasicek AT fit.vutbr.cz)
6 Marek Vavrusa (xvavru00 AT stud.fit.vutbr.cz)
8 Copyright (c) 2008. All rights reserved.
10 This software is open source.
12 Redistribution and use in source and binary forms, with or without
13 modification, are permitted provided that the following conditions
16 Redistributions of source code must retain the above copyright notice,
17 this list of conditions and the following disclaimer.
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.
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.
35 Modified for unit test by Wouter Wijngaards, NLnet Labs, 2009.
40 log_info("pythonmod: init called, module id is %d port: %d script: %s" % (id, cfg.port, mod_env['script']))
44 log_info("pythonmod: deinit called, module id is %d" % id)
47 def inform_super(id, qstate, superqstate, qdata):
50 def setTTL(qstate, ttl):
51 """Sets return_msg TTL and all the RRs TTL"""
53 qstate.return_msg.rep.ttl = ttl
54 if (qstate.return_msg.rep):
55 for i in range(0,qstate.return_msg.rep.rrset_count):
56 d = qstate.return_msg.rep.rrsets[i].entry.data
57 for j in range(0,d.count+d.rrsig_count):
60 def dataHex(data, prefix=""):
62 for i in range(0, int((len(data)+15)/16)):
63 res += "%s0x%02X | " % (prefix, i*16)
64 if type(data[0]) == type(1):
65 d = map(lambda x:int(x), data[i*16:i*16+17])
67 d = map(lambda x:ord(x), data[i*16:i*16+17])
69 res += "%02X " % int(ch)
70 for i in range(0,17-len(data[i*16:i*16+17])):
74 if (ch < 32) or (ch > 127):
81 def printReturnMsg(qstate):
82 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))
83 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)
84 if (qstate.return_msg.rep):
85 print ("RRSets:",qstate.return_msg.rep.rrset_count)
87 for i in range(0,qstate.return_msg.rep.rrset_count):
88 r = qstate.return_msg.rep.rrsets[i]
90 print (i,":",rk.dname_list, rk.dname_str, "flags: %04X" % rk.flags)
91 print ("type:",rk.type_str,"(%d)" % ntohs(rk.type), "class:",rk.rrset_class_str,"(%d)" % ntohs(rk.rrset_class))
94 print (" RRDatas:",d.count+d.rrsig_count)
95 for j in range(0,d.count+d.rrsig_count):
96 print (" ",j,":","TTL=",d.rr_ttl[j],"RR data:")
97 print (dataHex(d.rr_data[j]," "))
100 def operate(id, event, qstate, qdata):
101 log_info("pythonmod: operate called, id: %d, event:%s" % (id, strmodulevent(event)))
102 #print ("pythonmod: per query data", qdata)
104 print ("Query:", qstate.qinfo.qname, qstate.qinfo.qname_list, qstate.qinfo.qname_str)
105 print ("Type:",qstate.qinfo.qtype_str,"(%d)" % qstate.qinfo.qtype)
106 print ("Class:",qstate.qinfo.qclass_str,"(%d)" % qstate.qinfo.qclass)
109 if (event == MODULE_EVENT_NEW or event == MODULE_EVENT_PASS) and (qstate.qinfo.qname_str.endswith("example.com.")):
110 print (qstate.qinfo.qname_str)
112 qstate.ext_state[id] = MODULE_FINISHED
116 for z in range(2, 10000):
120 msg = DNSMessage(qstate.qinfo.qname_str, RR_TYPE_A, RR_CLASS_IN, PKT_QR | PKT_RA | PKT_AA) #, 300)
121 #msg.authority.append("xxx.seznam.cz. 10 IN A 192.168.1.1")
122 #msg.additional.append("yyy.seznam.cz. 10 IN A 1.1.1.2.")
124 # answer can be returned to the client without further checking.
126 if qstate.qinfo.qtype == RR_TYPE_A:
127 msg.answer.append("%s 10 IN A 192.168.1.1" % qstate.qinfo.qname_str)
128 if (qstate.qinfo.qtype == RR_TYPE_SRV) or (qstate.qinfo.qtype == RR_TYPE_ANY):
129 msg.answer.append("%s 10 IN SRV 0 0 80 neinfo.example.com." % qstate.qinfo.qname_str)
130 if (qstate.qinfo.qtype == RR_TYPE_TXT) or (qstate.qinfo.qtype == RR_TYPE_ANY):
131 msg.answer.append("%s 10 IN TXT path=/" % qstate.qinfo.qname_str)
133 if not msg.set_return_msg(qstate):
134 qstate.ext_state[id] = MODULE_ERROR
137 #qstate.return_msg.rep.security = 2 #pokud nebude nasledovat validator, je zapotrebi nastavit security, aby nebyl paket zahozen v mesh_send_reply
138 printReturnMsg(qstate)
140 #Authoritative result can't be stored in cache
141 #if (not storeQueryInCache(qstate, qstate.return_msg.qinfo, qstate.return_msg.rep, 0)):
142 # print "Can't store in cache"
143 # qstate.ext_state[id] = MODULE_ERROR
147 qstate.return_rcode = RCODE_NOERROR
150 if event == MODULE_EVENT_NEW:
151 qstate.ext_state[id] = MODULE_WAIT_MODULE
154 if event == MODULE_EVENT_MODDONE:
155 log_info("pythonmod: previous module done")
156 qstate.ext_state[id] = MODULE_FINISHED
159 if event == MODULE_EVENT_PASS:
160 log_info("pythonmod: event_pass")
161 qstate.ext_state[id] = MODULE_WAIT_MODULE
164 log_err("pythonmod: BAD event")
165 qstate.ext_state[id] = MODULE_ERROR
168 log_info("pythonmod: script loaded.")