From: Marcin Siodelski <marcin@isc.org>
Date: Thu, 31 Aug 2017 15:02:17 +0000 (+0200)
Subject: [5305] Use weak pointer to reference a network from subnet.
X-Git-Tag: trac5073a_base~11^2~13
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9094a926dd4989772dbfe8dfe2ab7a377fa9ddb;p=thirdparty%2Fkea.git

[5305] Use weak pointer to reference a network from subnet.
---

diff --git a/src/lib/dhcpsrv/network.h b/src/lib/dhcpsrv/network.h
index a5590522c9..3b8beaa63b 100644
--- a/src/lib/dhcpsrv/network.h
+++ b/src/lib/dhcpsrv/network.h
@@ -12,6 +12,7 @@
 #include <dhcpsrv/cfg_option.h>
 #include <dhcpsrv/cfg_4o6.h>
 #include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
 #include <string>
 
 namespace isc {
@@ -95,6 +96,9 @@ protected:
 /// @brief Pointer to the @ref Network object.
 typedef boost::shared_ptr<Network> NetworkPtr;
 
+/// @brief Weak pointer to the @ref Network object.
+typedef boost::weak_ptr<Network> WeakNetworkPtr;
+
 } // end of namespace isc::dhcp
 } // end of namespace isc
 
diff --git a/src/lib/dhcpsrv/subnet.h b/src/lib/dhcpsrv/subnet.h
index 1d860fdc07..75d3fac1c3 100644
--- a/src/lib/dhcpsrv/subnet.h
+++ b/src/lib/dhcpsrv/subnet.h
@@ -352,7 +352,7 @@ public:
     template<typename SharedNetworkPtrType>
     void getSharedNetwork(SharedNetworkPtrType& shared_network) const {
         shared_network = boost::dynamic_pointer_cast<
-            typename SharedNetworkPtrType::element_type>(shared_network_);
+            typename SharedNetworkPtrType::element_type>(shared_network_.lock());
     }
 
 private:
@@ -538,7 +538,8 @@ protected:
     /// See @ref HRMode type for details.
     HRMode host_reservation_mode_;
 
-    NetworkPtr shared_network_;
+    /// @brief Pointer to a shared network that subnet belongs to.
+    WeakNetworkPtr shared_network_;
 };
 
 /// @brief A generic pointer to either Subnet4 or Subnet6 object