1''' 2 resgen.py: This example shows how to generate authoritative response 3 4 Copyright (c) 2009, Zdenek Vasicek (vasicek AT fit.vutbr.cz) 5 Marek Vavrusa (xvavru00 AT stud.fit.vutbr.cz) 6 7 This software is open source. 8 9 Redistribution and use in source and binary forms, with or without 10 modification, are permitted provided that the following conditions 11 are met: 12 13 * Redistributions of source code must retain the above copyright notice, 14 this list of conditions and the following disclaimer. 15 16 * Redistributions in binary form must reproduce the above copyright notice, 17 this list of conditions and the following disclaimer in the documentation 18 and/or other materials provided with the distribution. 19 20 * Neither the name of the organization nor the names of its 21 contributors may be used to endorse or promote products derived from this 22 software without specific prior written permission. 23 24 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE 28 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 POSSIBILITY OF SUCH DAMAGE. 35''' 36def init(id, cfg): return True 37 38def deinit(id): return True 39 40def inform_super(id, qstate, superqstate, qdata): return True 41 42def operate(id, event, qstate, qdata): 43 if (event == MODULE_EVENT_NEW) or (event == MODULE_EVENT_PASS): 44 if (qstate.qinfo.qname_str.endswith(".localdomain.")): #query name ends with localdomain 45 #create instance of DNS message (packet) with given parameters 46 msg = DNSMessage(qstate.qinfo.qname_str, RR_TYPE_A, RR_CLASS_IN, PKT_QR | PKT_RA | PKT_AA) 47 #append RR 48 if (qstate.qinfo.qtype == RR_TYPE_A) or (qstate.qinfo.qtype == RR_TYPE_ANY): 49 msg.answer.append("%s 10 IN A 127.0.0.1" % qstate.qinfo.qname_str) 50 #set qstate.return_msg 51 if not msg.set_return_msg(qstate): 52 qstate.ext_state[id] = MODULE_ERROR 53 return True 54 55 #we don't need validation, result is valid 56 qstate.return_msg.rep.security = 2 57 58 qstate.return_rcode = RCODE_NOERROR 59 qstate.ext_state[id] = MODULE_FINISHED 60 return True 61 else: 62 #pass the query to validator 63 qstate.ext_state[id] = MODULE_WAIT_MODULE 64 return True 65 66 if event == MODULE_EVENT_MODDONE: 67 log_info("pythonmod: iterator module done") 68 qstate.ext_state[id] = MODULE_FINISHED 69 return True 70 71 log_err("pythonmod: bad event") 72 qstate.ext_state[id] = MODULE_ERROR 73 return True 74