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])
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("www2.example.com.")):
110 print (qstate.qinfo.qname_str)
112 qstate.ext_state[id] = MODULE_FINISHED
114 msg = DNSMessage(qstate.qinfo.qname_str, RR_TYPE_A, RR_CLASS_IN, PKT_QR | PKT_RA | PKT_AA) #, 300)
115 #msg.authority.append("xxx.seznam.cz. 10 IN A 192.168.1.1")
116 #msg.additional.append("yyy.seznam.cz. 10 IN A 1.1.1.2.")
118 # answer can be returned to the client without further checking.
120 if qstate.qinfo.qtype == RR_TYPE_A:
121 msg.answer.append("%s 10 IN A 192.168.1.1" % qstate.qinfo.qname_str)
122 if (qstate.qinfo.qtype == RR_TYPE_SRV) or (qstate.qinfo.qtype == RR_TYPE_ANY):
123 msg.answer.append("%s 10 IN SRV 0 0 80 neinfo.example.com." % qstate.qinfo.qname_str)
124 if (qstate.qinfo.qtype == RR_TYPE_TXT) or (qstate.qinfo.qtype == RR_TYPE_ANY):
125 msg.answer.append("%s 10 IN TXT path=/" % qstate.qinfo.qname_str)
128 if not msg.set_return_msg(qstate):
129 qstate.ext_state[id] = MODULE_ERROR
132 #qstate.return_msg.rep.security = 2 #pokud nebude nasledovat validator, je zapotrebi nastavit security, aby nebyl paket zahozen v mesh_send_reply
133 printReturnMsg(qstate)
135 #Authoritative result can't be stored in cache
136 #if (not storeQueryInCache(qstate, qstate.return_msg.qinfo, qstate.return_msg.rep, 0)):
137 # print "Can't store in cache"
138 # qstate.ext_state[id] = MODULE_ERROR
142 qstate.return_rcode = RCODE_NOERROR
145 if event == MODULE_EVENT_NEW:
146 qstate.ext_state[id] = MODULE_WAIT_MODULE
149 if event == MODULE_EVENT_MODDONE:
150 log_info("pythonmod: previous module done")
151 qstate.ext_state[id] = MODULE_FINISHED
154 if event == MODULE_EVENT_PASS:
155 log_info("pythonmod: event_pass")
156 qstate.ext_state[id] = MODULE_WAIT_MODULE
159 log_err("pythonmod: BAD event")
160 qstate.ext_state[id] = MODULE_ERROR
163 log_info("pythonmod: script loaded.")