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