net-snmp 5.5 - Not HTML version

Hi everyone.

We are using "NET-SNMP version: 5.5" in "Linux localhost.localdomain 2.6.18-308.13.1.el5 #1 SMP Tue Aug 21 17:10:06 EDT 2012 i686 i686 i386 GNU/Linux". 

We have some questions about using net-snmp that we didn't find in documentation and examples  :
1) When must we use netsnmp_container_table_unregister, netsnmp_handler_free and netsnmp_unregister_handler ?
2)  The function netsnmp_cache_free is making a test of cache_head (http://fossies.org/dox/net-snmp-5.7.1/cache__handler_8c_source.html#l00233). This is generating  the following memory leak :
==5518== 60 bytes in 1 blocks are still reachable in loss record 82 of 100
==5518==    at 0x4005E69: calloc (vg_replace_malloc.c:593)
==5518==    by 0x4073610: netsnmp_cache_create (in /usr/lib/libnetsnmphelpers.so.20.0.0)
==5518==    by 0x8091080: Interface::containerInit(interface_ctx_s*, unsigned long*, int, String const&) (Interface.cpp:1736)
==5518==    by 0x808BF93: Interface::initializeInterface(netsnmp_data_list_s*, String const&, unsigned long*, int, unsigned int, unsigned int, String const&, interface_ctx_s*, TableMIBNode const*) (Interface.cpp:347)
==5518==    by 0x808762B: AgentSNMP::initializeTable(TableMIBNode const*) (AgentSNMP.cpp:261)
==5518==    by 0x80872C6: AgentSNMP::initNodeGateway() (AgentSNMP.cpp:200)
==5518==    by 0x8086B66: AgentSNMP::start() (AgentSNMP.cpp:143)
==5518==    by 0x8068964: SNMPInterfaceManager::initialize(CoreLib*) (SNMPInterfaceManager.cpp:27)
==5518==    by 0x8063FAD: CoreStandard::doJob(char*) (CoreStandard.cpp:74)
==5518==    by 0x8063C1A: CoreStandard::execute(int, char**) (CoreStandard.cpp:53)
==5518==    by 0x8064394: main (CoreStandard.cpp:136)

Are we using the function correctly ?

We are developing our application in C++. For getting memory leaks we are using valgrind (3.8.0). When we finish our application, valgrind reports to us the memory leaks attached to this message for net-snmp. 
Is it possible remove these memory leaks ?

Thanks in advance.



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