157 lines
6.4 KiB
Python
157 lines
6.4 KiB
Python
# -*- coding: utf-8 -*-
|
|
'''
|
|
ubmodule-msg.py: simple response packet logger
|
|
|
|
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.
|
|
'''
|
|
import os
|
|
|
|
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, qstate.qinfo.qname_str,
|
|
print "Type:",qstate.qinfo.qtype_str,"(%d)" % qstate.qinfo.qtype,
|
|
print "Class:",qstate.qinfo.qclass_str,"(%d)" % qstate.qinfo.qclass
|
|
print
|
|
|
|
#if event == MODULE_EVENT_PASS: #pokud mame "validator python iterator"
|
|
if (event == MODULE_EVENT_NEW) and (qstate.qinfo.qname_str.endswith(".seznam.cz.")): #pokud mame "python validator iterator"
|
|
print qstate.qinfo.qname_str
|
|
|
|
qstate.ext_state[id] = MODULE_FINISHED
|
|
|
|
msg = DNSMessage(qstate.qinfo.qname_str, RR_TYPE_A, RR_CLASS_IN, PKT_QR | PKT_RA | PKT_AA) #, 300)
|
|
#msg.authority.append("xxx.seznam.cz. 10 IN A 192.168.1.1")
|
|
#msg.additional.append("yyy.seznam.cz. 10 IN A 1.1.1.2.")
|
|
|
|
if qstate.qinfo.qtype == RR_TYPE_A:
|
|
msg.answer.append("%s 10 IN A 192.168.1.1" % qstate.qinfo.qname_str)
|
|
if (qstate.qinfo.qtype == RR_TYPE_SRV) or (qstate.qinfo.qtype == RR_TYPE_ANY):
|
|
msg.answer.append("%s 10 IN SRV 0 0 80 neinfo.example.com." % qstate.qinfo.qname_str)
|
|
if (qstate.qinfo.qtype == RR_TYPE_TXT) or (qstate.qinfo.qtype == RR_TYPE_ANY):
|
|
msg.answer.append("%s 10 IN TXT path=/" % qstate.qinfo.qname_str)
|
|
|
|
if not msg.set_return_msg(qstate):
|
|
qstate.ext_state[id] = MODULE_ERROR
|
|
return True
|
|
|
|
#qstate.return_msg.rep.security = 2 #pokud nebude nasledovat validator, je zapotrebi nastavit security, aby nebyl paket zahozen v mesh_send_reply
|
|
printReturnMsg(qstate)
|
|
|
|
#Authoritative result can't be stored in cache
|
|
#if (not storeQueryInCache(qstate, qstate.return_msg.qinfo, qstate.return_msg.rep, 0)):
|
|
# print "Can't store in cache"
|
|
# qstate.ext_state[id] = MODULE_ERROR
|
|
# return False
|
|
#print "Store OK"
|
|
|
|
qstate.return_rcode = RCODE_NOERROR
|
|
return True
|
|
|
|
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.")
|