Greetings,
I’m trying to use the Python module to generate NAPTR responses. Starting with the unmodified resgen.py example script, it correctly responds to A type queries, but when trying NAPTR, it does not work.
I’ve made the following changes to the script:
def operate(id, event, qstate, qdata):
if (event == MODULE_EVENT_NEW) or (event == MODULE_EVENT_PASS):
- if (qstate.qinfo.qname_str.endswith(“.localdomain.”)): #query name ends with localdomain
- if (qstate.qinfo.qname_str.endswith(“.example.e164.arpa.”)): #query name ends with example.e164.arpa
#create instance of DNS message (packet) with given parameters
- msg = DNSMessage(qstate.qinfo.qname_str, RR_TYPE_A, RR_CLASS_IN, PKT_QR | PKT_RA | PKT_AA)
- msg = DNSMessage(qstate.qinfo.qname_str, RR_TYPE_NAPTR, 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):
- msg.answer.append(“%s 10 IN A 127.0.0.1” % qstate.qinfo.qname_str)
-
if (qstate.qinfo.qtype == RR_TYPE_NAPTR):
-
log_info(“pythonmod: Got NAPTR request”)
-
response = “5 IN NAPTR 5 10 "u" "E2U+sip" "!^(.*)$!sip:\\1@99.99.99.99!"”
-
msg.answer.append(“%s %s” % (qstate.qinfo.qname_str,response))
#set qstate.return_msg
if not msg.set_return_msg(qstate):
qstate.ext_state[id] = MODULE_ERROR
@@ -55,6 +22,7 @@
#we don’t need validation, result is valid
qstate.return_msg.rep.security = 2 -
log_info(“pythonmod: Returning answer”)
qstate.return_rcode = RCODE_NOERROR
qstate.ext_state[id] = MODULE_FINISHED
return True
This is the log for a test query:
Oct 29 10:28:03 chai unbound: [3598:0] info: 192.168.50.2 0.9.8.7.6.5.4.3.2.1.1.example.e164.arpa. NAPTR IN
Oct 29 10:28:03 chai unbound: [3598:0] info: pythonmod: Got NAPTR request
Oct 29 10:28:03 chai unbound: [3598:0] info: storeResponse: packet: ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0#012;; flags: qr aa ra ; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 #012;; QUESTION SECTION:#012;; 0.9.8.7.6.5.4.3.2.1.1.example.e164.arpa #011IN#011NAPTR#012#012;; ANSWER SECTION:#012#012;; AUTHORITY SECTION:#012#012;; ADDITIONAL SECTION:#012#012;; Query time: 0 msec#012;; WHEN: Thu Jan 1 00:00:00 1970#012;; MSG SIZE rcvd: 47
Oct 29 10:28:03 chai unbound: [3598:0] info: pythonmod: Returning answer
Oct 29 10:28:03 chai unbound: [3598:0] info: mesh_run: end 0 recursion states (0 with reply, 0 detached), 0 waiting replies, 1 recursion replies sent, 0 replies dropped, 0 states jostled out
Oct 29 10:28:03 chai unbound: [3598:0] info: average recursion processing time 0.000000 sec
Oct 29 10:28:03 chai unbound: [3598:0] info: histogram of recursion processing times
Oct 29 10:28:03 chai unbound: [3598:0] info: [25%]=0 median[50%]=0 [75%]=0
Oct 29 10:28:03 chai unbound: [3598:0] info: lower(secs) upper(secs) recursions
Oct 29 10:28:03 chai unbound: [3598:0] info: 0.000000 0.000001 1
And the output from dig:
dig -p 5353 @192.168.50.2 IN NAPTR 0.9.8.7.6.5.4.3.2.1.1.example.e164.arpa
; <<>> DiG 9.7.3-P3-RedHat-9.7.3-8.P3.el6_2.3 <<>> -p 5353 @192.168.50.2 IN NAPTR 0.9.8.7.6.5.4.3.2.1.1.example.e164.arpa
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19201
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
; 0.9.8.7.6.5.4.3.2.1.1.example.e164.arpa. IN NAPTR
;; Query time: 0 msec
;; SERVER: 192.168.50.2#5353(192.168.50.2)
;; WHEN: Tue Oct 29 17:28:03 2013
;; MSG SIZE rcvd: 47