[1986] Cleanups; use scoped_ptr, and more log msgs

- use scoped_ptr instead of raw pointer and 'manual' cleanup
- log errors in b10-ddns if there is an error response from b10-auth
- minor other cleanups

src/bin/auth/auth.spec.pre.in

@@ -134,12 +134,12 @@
       },
       {
         "command_name": "start_ddns_forwarder",
-        "command_description": "(Re)start internal forwarding of DDNS Update packets.",
+        "command_description": "(Re)start internal forwarding of DDNS Update packets. This is automatically called if b10-ddns is started.",
         "command_args": []
       },
       {
         "command_name": "stop_ddns_forwarder",
-        "command_description": "Stop internal forwarding of DDNS Update packets",
+        "command_description": "Stop internal forwarding of DDNS Update packets. This is automatically called if b10-ddns is stopped.",
         "command_args": []
       }
     ],

src/bin/auth/auth_messages.mes

@@ -110,9 +110,6 @@ look into the cause and address the issue.  The log message includes
 the client's address (and port), and the error message sent from the
 lower layer that detects the failure.
 
-% AUTH_RECEIVED_NOTIFY received incoming NOTIFY for zone name %1, zone class %2
-This is a debug message reporting that an incoming NOTIFY was received.
-
 % AUTH_NOTIFY_QUESTIONS invalid number of questions (%1) in incoming NOTIFY
 This debug message is logged by the authoritative server when it receives
 a NOTIFY packet that contains zero or more than one question. (A valid
@@ -169,6 +166,9 @@ bug ticket for this issue.
 This is a debug message issued when the authoritative server has received
 a command on the command channel.
 
+% AUTH_RECEIVED_NOTIFY received incoming NOTIFY for zone name %1, zone class %2
+This is a debug message reporting that an incoming NOTIFY was received.
+
 % AUTH_RECEIVED_SENDSTATS command 'sendstats' received
 This is a debug message issued when the authoritative server has received
 a command from the statistics module to send it data. The 'sendstats'

src/bin/auth/auth_srv.cc

@@ -58,6 +58,7 @@
 
 #include <boost/bind.hpp>
 #include <boost/lexical_cast.hpp>
+#include <boost/scoped_ptr.hpp>
 
 #include <algorithm>
 #include <cassert>
@@ -303,7 +304,7 @@ private:
 
     // Socket session forwarder for dynamic update requests
     BaseSocketSessionForwarder& ddns_base_forwarder_;
-    SocketSessionForwarderHolder* ddns_forwarder_;
+    boost::scoped_ptr<SocketSessionForwarderHolder> ddns_forwarder_;
 
     /// Increment query counter
     void incCounter(const int protocol);
@@ -337,9 +338,6 @@ AuthSrvImpl::AuthSrvImpl(const bool use_cache,
 
     // enable or disable the cache
     cache_.setEnabled(use_cache);
-
-    // TODO: REMOVE and create 'on demand'
-    //createDDNSForwarder();
 }
 
 AuthSrvImpl::~AuthSrvImpl() {
@@ -347,7 +345,6 @@ AuthSrvImpl::~AuthSrvImpl() {
         xfrout_client_.disconnect();
         xfrout_connected_ = false;
     }
-    destroyDDNSForwarder();
 }
 
 // This is a derived class of \c DNSLookup, to serve as a
@@ -892,25 +889,21 @@ AuthSrvImpl::processNotify(const IOMessage& io_message, Message& message,
 
 bool
 AuthSrvImpl::hasDDNSForwarder() {
-    return (ddns_forwarder_ != NULL);
+    return (ddns_forwarder_);
 }
 
 void
 AuthSrvImpl::createDDNSForwarder() {
-    if (hasDDNSForwarder()) {
-        destroyDDNSForwarder();
-    }
     LOG_DEBUG(auth_logger, DBG_AUTH_OPS, AUTH_START_DDNS_FORWARDER);
-    ddns_forwarder_ = new SocketSessionForwarderHolder("update",
-                                                       ddns_base_forwarder_);
+    ddns_forwarder_.reset(
+        new SocketSessionForwarderHolder("update", ddns_base_forwarder_));
 }
 
 void
 AuthSrvImpl::destroyDDNSForwarder() {
-    if (ddns_forwarder_ != NULL) {
+    if (ddns_forwarder_) {
         LOG_DEBUG(auth_logger, DBG_AUTH_OPS, AUTH_STOP_DDNS_FORWARDER);
-        delete ddns_forwarder_;
-        ddns_forwarder_ = NULL;
+        ddns_forwarder_.reset();
     }
 }
 

src/bin/ddns/ddns.py.in

@@ -548,7 +548,7 @@ class DDNSServer:
         answer, _ = self._cc._session.group_recvmsg(False, seq)
         rcode, error_msg = parse_answer(answer)
         if (rcode != 0):
-            raise Exception(error_msg)
+            logger.error(DDNS_START_FORWARDER_ERROR, error_msg)
 
     def __notify_stop_forwarder(self):
         '''Notify auth that DDNS Update packets can now be forwarded'''
@@ -557,7 +557,7 @@ class DDNSServer:
         answer, _ = self._cc._session.group_recvmsg(False, seq)
         rcode, error_msg = parse_answer(answer)
         if (rcode != 0):
-            raise Exception(error_msg)
+            logger.error(DDNS_STOP_FORWARDER_ERROR, error_msg)
 
     def __notify_auth(self, zname, zclass):
         '''Notify auth of the update, if necessary.'''

src/bin/ddns/ddns_messages.mes

@@ -192,6 +192,12 @@ be completed, after which the process will exit.
 The ddns process has successfully started and is now ready to receive commands
 and updates.
 
+% DDNS_START_FOWARDER_ERROR Error from b10-auth when requesting DDNS UPDATE forwarding: %1
+There was an error response from b10-auth to the command to start
+forwarding DDNS UPDATE messages to b10-ddns.
+The error message is printed, and additional information may be found in
+the b10-auth log output.
+
 % DDNS_STOPPED ddns server has stopped
 The ddns process has successfully stopped and is no longer listening for or
 handling commands or updates, and will now exit.
@@ -200,6 +206,12 @@ handling commands or updates, and will now exit.
 There was a keyboard interrupt signal to stop the ddns process. The
 process will now shut down.
 
+% DDNS_STOP_FOWARDER_ERROR Error from b10-auth when requesting to stop DDNS UPDATE forwarding: %1
+There was an error response from b10-auth to the command to stop
+forwarding DDNS UPDATE messages to b10-ddns.
+The error message is printed, and additional information may be found in
+the b10-auth log output.
+
 % DDNS_UNCAUGHT_EXCEPTION uncaught exception of type %1: %2
 The b10-ddns process encountered an uncaught exception and will now shut
 down. This is indicative of a programming error and should not happen under