1 files changed, 88 insertions, 0 deletions
diff --git a/external/unbound/pythonmod/examples/resmod.py b/external/unbound/pythonmod/examples/resmod.py
new file mode 100644
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+++ b/external/unbound/pythonmod/examples/resmod.py
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+'''
+ resmod.py: This example shows how to modify the response from iterator 
+
+ 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.
+'''
+
+def init(id, cfg): return True
+
+def deinit(id): return True
+
+def inform_super(id, qstate, superqstate, qdata): return True
+
+def setTTL(qstate, ttl):
+    """Updates return_msg TTL and the TTL of all the RRs"""
+    if qstate.return_msg:
+        qstate.return_msg.rep.ttl = ttl
+        if (qstate.return_msg.rep):
+            for i in range(0,qstate.return_msg.rep.rrset_count):
+                d = qstate.return_msg.rep.rrsets[i].entry.data
+                for j in range(0,d.count+d.rrsig_count):
+                    d.rr_ttl[j] = ttl
+
+def operate(id, event, qstate, qdata):
+    if (event == MODULE_EVENT_NEW) or (event == MODULE_EVENT_PASS):
+        #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")
+
+        if not qstate.return_msg:
+            qstate.ext_state[id] = MODULE_FINISHED 
+            return True
+
+        #modify the response
+
+        qdn = qstate.qinfo.qname_str
+        if qdn.endswith(".nic.cz."):
+            #invalidate response in cache added by iterator
+            #invalidateQueryInCache(qstate, qstate.return_msg.qinfo)
+
+            #modify TTL to 10 secs and store response in cache
+            #setTTL(qstate, 5)
+            #if not storeQueryInCache(qstate, qstate.return_msg.qinfo, qstate.return_msg.rep, 0):
+            #    qstate.ext_state[id] = MODULE_ERROR
+            #    return False
+
+            #modify TTL of response, which will be send to a) validator and then b) client
+            setTTL(qstate, 10)
+            qstate.return_rcode = RCODE_NOERROR
+
+        qstate.ext_state[id] = MODULE_FINISHED 
+        return True
+      
+    log_err("pythonmod: bad event")
+    qstate.ext_state[id] = MODULE_ERROR
+    return True