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resip.py modified for ipv6 and return A and AAAA records(based on ipv4 or ipv6 used to communication)
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| ''' | |
| resip.py: This example shows how to generate authoritative response | |
| and how to find out the IP address of a client | |
| Copyright (c) 2009, Zdenek Vasicek (vasicek AT fit.vutbr.cz) | |
| Marek Vavrusa (xvavru00 AT stud.fit.vutbr.cz) | |
| 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. | |
| * Neither the name of the organization nor the names of its | |
| contributors may be used to endorse or promote products derived from this | |
| software without specific prior written permission. | |
| 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. | |
| Usage: | |
| dig @127.0.0.1 -t TXT what.is.my.ip. | |
| ''' | |
| from ipaddress import ip_address, IPv4Address | |
| def validIPAddress(IP: str) -> str: | |
| try: | |
| return True if type(ip_address(IP)) is IPv4Address else False | |
| except ValueError: | |
| return "Invalid" | |
| def init(id, cfg): return True | |
| def deinit(id): return True | |
| def inform_super(id, qstate, superqstate, qdata): return True | |
| def operate(id, event, qstate, qdata): | |
| #print("Operate {} state: {}".format(event, qstate)) | |
| # Please note that if this module blocks, by moving to the validator | |
| # to validate or iterator to lookup or spawn a subquery to look up, | |
| # then, other incoming queries are queued up onto this module and | |
| # all of them receive the same reply. | |
| # You can inspect the cache. | |
| if (event == MODULE_EVENT_NEW) or (event == MODULE_EVENT_PASS): | |
| if (qstate.qinfo.qname_str.endswith("myip.") or qstate.qinfo.qname_str.endswith("myip.rhscz.")): #query name ends with localdomain | |
| #create instance of DNS message (packet) with given parameters | |
| msg = DNSMessage(qstate.qinfo.qname_str, RR_TYPE_A | RR_TYPE_AAAA | RR_TYPE_ANY, RR_CLASS_IN, PKT_QR | PKT_RA | PKT_AA) | |
| #append RR | |
| if (qstate.qinfo.qtype == RR_TYPE_A) or (qstate.qinfo.qtype == RR_TYPE_ANY) or (qstate.qinfo.qtype == RR_TYPE_AAAA): | |
| rl = qstate.mesh_info.reply_list | |
| while (rl): | |
| if rl.query_reply: | |
| q = rl.query_reply | |
| #log_info("IP address:",q.addr) | |
| #print("IP address:",q.addr) | |
| # The TTL of 0 is mandatory, otherwise it ends up in | |
| # the cache, and is returned to other IP addresses. | |
| if validIPAddress(q.addr): | |
| msg.answer.append("%s 0 IN A %s" % (qstate.qinfo.qname_str, q.addr)) | |
| #log_info("IP address:",q.addr) | |
| else: | |
| msg.answer.append("%s 0 IN AAAA %s" % (qstate.qinfo.qname_str, q.addr)) | |
| #log_info("IP address:",q.addr) | |
| rl = rl.next | |
| elif (qstate.qinfo.qtype == RR_TYPE_TXT): | |
| rl = qstate.mesh_info.reply_list | |
| while (rl): | |
| if rl.query_reply: | |
| q = rl.query_reply | |
| #log_info("IP address:",q.addr) | |
| #print("IP address:",q.addr) | |
| # The TTL of 0 is mandatory, otherwise it ends up in | |
| # the cache, and is returned to other IP addresses. | |
| msg.answer.append("%s 0 IN TXT %s" % (qstate.qinfo.qname_str, q.addr)) | |
| #log_info("IP address:",q.addr) | |
| rl = rl.next | |
| #set qstate.return_msg | |
| if not msg.set_return_msg(qstate): | |
| qstate.ext_state[id] = MODULE_ERROR | |
| return True | |
| #we don't need validation, result is valid | |
| qstate.return_msg.rep.security = 2 | |
| qstate.return_rcode = RCODE_NOERROR | |
| qstate.ext_state[id] = MODULE_FINISHED | |
| return True | |
| else: | |
| #pass the query to validator | |
| qstate.ext_state[id] = MODULE_WAIT_MODULE | |
| return True | |
| if event == MODULE_EVENT_MODDONE: | |
| #log_info("pythonmod: iterator module done") | |
| qstate.ext_state[id] = MODULE_FINISHED | |
| return True | |
| #log_err("pythonmod: bad event") | |
| qstate.ext_state[id] = MODULE_ERROR | |
| return True |
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