unbound/pythonmod/examples/log.py

   1 import os
   2 '''
   3  calc.py: Response packet logger
   4
   5  Copyright (c) 2009, Zdenek Vasicek (vasicek AT fit.vutbr.cz)
   6                      Marek Vavrusa  (xvavru00 AT stud.fit.vutbr.cz)
   7
   8  This software is open source.
   9
  10  Redistribution and use in source and binary forms, with or without
  11  modification, are permitted provided that the following conditions
  12  are met:
  13
  14     * Redistributions of source code must retain the above copyright notice,
  15       this list of conditions and the following disclaimer.
  16
  17     * Redistributions in binary form must reproduce the above copyright notice,
  18       this list of conditions and the following disclaimer in the documentation
  19       and/or other materials provided with the distribution.
  20
  21     * Neither the name of the organization nor the names of its
  22       contributors may be used to endorse or promote products derived from this
  23       software without specific prior written permission.
  24
  25  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  29  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  POSSIBILITY OF SUCH DAMAGE.
  36 '''
  37
  38 def dataHex(data, prefix=""):
  39     """Converts binary string data to display representation form"""
  40     res = ""
  41     for i in range(0, (len(data)+15)/16):
  42         res += "%s0x%02X | " % (prefix, i*16)
  43         d = map(lambda x:ord(x), data[i*16:i*16+17])
  44         for ch in d:
  45             res += "%02X " % ch
  46         for i in range(0,17-len(d)):
  47             res += "   "
  48         res += "| "
  49         for ch in d:
  50             if (ch < 32) or (ch > 127):
  51                 res += ". "
  52             else:
  53                 res += "%c " % ch
  54         res += "\n"
  55     return res
  56
  57 def logDnsMsg(qstate):
  58     """Logs response"""
  59
  60     r  = qstate.return_msg.rep
  61     q  = qstate.return_msg.qinfo
  62
  63     print "-"*100
  64     print("Query: %s, type: %s (%d), class: %s (%d) " % (
  65             qstate.qinfo.qname_str, qstate.qinfo.qtype_str, qstate.qinfo.qtype,
  66             qstate.qinfo.qclass_str, qstate.qinfo.qclass))
  67     print "-"*100
  68     print "Return    reply :: flags: %04X, QDcount: %d, Security:%d, TTL=%d" % (r.flags, r.qdcount, r.security, r.ttl)
  69     print "          qinfo :: qname: %s %s, qtype: %s, qclass: %s" % (str(q.qname_list), q.qname_str, q.qtype_str, q.qclass_str)
  70
  71     if (r):
  72         print "Reply:"
  73         for i in range(0, r.rrset_count):
  74             rr = r.rrsets[i]
  75
  76             rk = rr.rk
  77             print i,":",rk.dname_list, rk.dname_str, "flags: %04X" % rk.flags,
  78             print "type:",rk.type_str,"(%d)" % ntohs(rk.type), "class:",rk.rrset_class_str,"(%d)" % ntohs(rk.rrset_class)
  79
  80             d = rr.entry.data
  81             for j in range(0,d.count+d.rrsig_count):
  82                 print "  ",j,":","TTL=",d.rr_ttl[j],
  83                 if (j >= d.count): print "rrsig",
  84                 print
  85                 print dataHex(d.rr_data[j],"       ")
  86
  87     print "-"*100
  88
  89 def init(id, cfg):
  90    log_info("pythonmod: init called, module id is %d port: %d script: %s" % (id, cfg.port, cfg.python_script))
  91    return True
  92
  93 def deinit(id):
  94    log_info("pythonmod: deinit called, module id is %d" % id)
  95    return True
  96
  97 def inform_super(id, qstate, superqstate, qdata):
  98    return True
  99
 100 def operate(id, event, qstate, qdata):
 101    log_info("pythonmod: operate called, id: %d, event:%s" % (id, strmodulevent(event)))
 102
 103    if (event == MODULE_EVENT_NEW) or (event == MODULE_EVENT_PASS):
 104       #Pass on the new event to the iterator
 105       qstate.ext_state[id] = MODULE_WAIT_MODULE
 106       return True
 107
 108    if event == MODULE_EVENT_MODDONE:
 109       #Iterator finished, show response (if any)
 110
 111       if (qstate.return_msg):
 112           logDnsMsg(qstate)
 113
 114       qstate.ext_state[id] = MODULE_FINISHED
 115       return True
 116
 117    qstate.ext_state[id] = MODULE_ERROR
 118    return True
 119