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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.
'''
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", event,"state:",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("what.is.my.ip.")): #query name ends with localdomain
#create instance of DNS message (packet) with given parameters
msg = DNSMessage(qstate.qinfo.qname_str, RR_TYPE_TXT, RR_CLASS_IN, PKT_QR | PKT_RA | PKT_AA)
#append RR
if (qstate.qinfo.qtype == RR_TYPE_TXT) or (qstate.qinfo.qtype == RR_TYPE_ANY):
rl = qstate.mesh_info.reply_list
while (rl):
if rl.query_reply:
q = rl.query_reply
# 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 %d (%s)\"" % (qstate.qinfo.qname_str, q.addr,q.port,q.family))
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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