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# -*- coding: utf-8 -*-
'''
ubmodule-tst.py:
Authors: Zdenek Vasicek (vasicek AT fit.vutbr.cz)
Marek Vavrusa (xvavru00 AT stud.fit.vutbr.cz)
Copyright (c) 2008. All rights reserved.
This software is open source.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
'''
def init(id, cfg):
log_info("pythonmod: init called, module id is %d port: %d script: %s" % (id, cfg.port, cfg.python_script))
return True
def deinit(id):
log_info("pythonmod: deinit called, module id is %d" % id)
return True
def inform_super(id, qstate, superqstate, qdata):
return True
def setTTL(qstate, ttl):
"""Sets return_msg TTL and all the RRs TTL"""
if qstate.return_msg:
qstate.return_msg.rep.ttl = ttl
if (qstate.return_msg.rep):
for i in range(0,qstate.return_msg.rep.rrset_count):
d = qstate.return_msg.rep.rrsets[i].entry.data
for j in range(0,d.count+d.rrsig_count):
d.rr_ttl[j] = ttl
def dataHex(data, prefix=""):
res = ""
for i in range(0, (len(data)+15)/16):
res += "%s0x%02X | " % (prefix, i*16)
d = map(lambda x:ord(x), data[i*16:i*16+17])
for ch in d:
res += "%02X " % ch
for i in range(0,17-len(d)):
res += " "
res += "| "
for ch in d:
if (ch < 32) or (ch > 127):
res += ". "
else:
res += "%c " % ch
res += "\n"
return res
def printReturnMsg(qstate):
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)
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
if (qstate.return_msg.rep):
print "RRSets:",qstate.return_msg.rep.rrset_count
prevkey = None
for i in range(0,qstate.return_msg.rep.rrset_count):
r = qstate.return_msg.rep.rrsets[i]
rk = r.rk
print i,":",rk.dname_list, rk.dname_str, "flags: %04X" % rk.flags,
print "type:",rk.type_str,"(%d)" % ntohs(rk.type), "class:",rk.rrset_class_str,"(%d)" % ntohs(rk.rrset_class)
d = r.entry.data
print " RRDatas:",d.count+d.rrsig_count
for j in range(0,d.count+d.rrsig_count):
print " ",j,":","TTL=",d.rr_ttl[j],"RR data:"
print dataHex(d.rr_data[j]," ")
def operate(id, event, qstate, qdata):
log_info("pythonmod: operate called, id: %d, event:%s" % (id, strmodulevent(event)))
#print "pythonmod: per query data", qdata
print "Query:", ''.join(map(lambda x:chr(max(32,ord(x))),qstate.qinfo.qname)), qstate.qinfo.qname_list,
print "Type:",qstate.qinfo.qtype_str,"(%d)" % qstate.qinfo.qtype,
print "Class:",qstate.qinfo.qclass_str,"(%d)" % qstate.qinfo.qclass
print
# TEST:
# > dig @127.0.0.1 www.seznam.cz A
# > dig @127.0.0.1 3.76.75.77.in-addr.arpa. PTR
# prvni dva dotazy vrati TTL 100
# > dig @127.0.0.1 www.seznam.cz A
# > dig @127.0.0.1 3.76.75.77.in-addr.arpa. PTR
# dalsi dva dotazy vrati TTL 10, ktere se bude s dalsimi dotazy snizovat, nez vyprsi a znovu se zaktivuje mesh
if qstate.return_msg:
printReturnMsg(qstate)
#qdn = '.'.join(qstate.qinfo.qname_list)
qdn = qstate.qinfo.qname_str
#Pokud dotaz konci na nasledujici, pozmenime TTL zpravy, ktera se posle klientovi (return_msg) i zpravy v CACHE
if qdn.endswith(".seznam.cz.") or qdn.endswith('.in-addr.arpa.'):
#pokud je v cache odpoved z iteratoru, pak ji zneplatnime, jinak se moduly nazavolaji do te doby, nez vyprsi TTL
invalidateQueryInCache(qstate, qstate.return_msg.qinfo)
if (qstate.return_msg.rep.authoritative):
print "X"*300
setTTL(qstate, 10) #do cache nastavime TTL na 10
if not storeQueryInCache(qstate, qstate.return_msg.qinfo, qstate.return_msg.rep, 0):
qstate.ext_state[id] = MODULE_ERROR
return False
setTTL(qstate, 100) #odpoved klientovi prijde s TTL 100
qstate.return_rcode = RCODE_NOERROR
if event == MODULE_EVENT_NEW:
qstate.ext_state[id] = MODULE_WAIT_MODULE
return True
if event == MODULE_EVENT_MODDONE:
log_info("pythonmod: previous module done")
qstate.ext_state[id] = MODULE_FINISHED
return True
if event == MODULE_EVENT_PASS:
log_info("pythonmod: event_pass")
qstate.ext_state[id] = MODULE_WAIT_MODULE
return True
log_err("pythonmod: BAD event")
qstate.ext_state[id] = MODULE_ERROR
return True
log_info("pythonmod: script loaded.")
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