need help with v3 traps

[Frank.Fock____t-online.de]

Hi Laura,

utarget below is freed before you use it! See below:

Best regards,
Frank

Laura Quiroga schrieb:
> I am trying to send v3 traps by following the example in 
> snmpTraps.cpp. 
> Unfortunately, this does not seem to work for me.  I am 
> getting an 
> exception when it tries to resolve the address.
>  
> Here is my code:
> SnmpTarget *target = NULL;
>  if (m_nVersion == version3) 
>  {
>   int port = atoi(m_sTargetPort.c_str());
>   address.set_port(port);
>   UTarget utarget(address);
>   utarget.set_version((snmp_version)m_nVersion);   // set 
> the SNMP 
> version SNMPV1 or V2
>   utarget.set_security_model(SecurityModel_USM);
>   utarget.set_security_name(securityName);
>   m_pPdu->set_security_level(SecurityLevel_authNoPriv);
>   m_pPdu->set_context_name("receive_trap");
>   m_pPdu->set_context_engine_id("receive_trap");
>   target = &utarget;

Here the scope of utarget ends and the pointer to
it (&utarget) will be invalid. Thus, you cannot use
target after the closing }.

>  }
>  else
>  {
>   CTarget ctarget(address);
>   ctarget.set_version((snmp_version)m_nVersion);   // set 
> the SNMP 
> version SNMPV1 or V2
>   ctarget.set_readcommunity(community);     // set the 
> community name to 
> use 
>   target = &ctarget;

This will not work either!

>  }
>  
> status = snmp.trap(*m_pPdu,*target);
> 
> Here is the callstack:
> GenAddress::operator=(const GenAddress & {...}) line 1876
> UTarget::resolve_to_U(OctetStr & {...}, int & 3, 
> GenAddress & {...}, 
> unsigned long & 3435973836, int & -858993460, unsigned 
> char & 204) line 
> 625
> Snmp::trap(Pdu & {...}, SnmpTarget & {...}) line 1013 + 
> 53 bytes 
> 
> It fails at address = (Address *)(addr.address)->clone();
>  
> Any suggestions?
>  
> -lxq
> 
>