starting and closing Net-SNMP

Hello,

I started to make my own snmptrapd.exe tool (used snmptrapd as an
example). So far im already receiving traps and displaying received
variables with OIDs on screen.

But i got some errors when closing the trap receiver. I'll try to
describe what i got:

I have one function that initializes snmp, goes into loop waiting for
traps and when i want, goes out of the loop and shuts down snmp.
Application doesn't terminate, i can start the receiver again,
without restarting (or should i say, i want to be able to do
that...).

So when the function is called i have something like this:
init_snmp("snmptrapd");
SOCK_STARTUP;

netsnmp_session *ss = NULL,*sess_list = NULL;
netsnmp_transport *transport = NULL;
transport = netsnmp_transport_open_server("snmptrapd", "udp:162");

if(!transport)
{
  // Printing some error messages
  SOCK_CLEANUP;
  return 0;
}
ss = snmptrapd_add_session(transport);
if(!ss)
{
  // Printing some error messages
  netsnmp_transport_free(transport);
  SOCK_CLEANUP;
  return 0;
}
else
{
  ss->next=sess_list;
  sess_list=ss;
}
// ......
And then, at the end, i have these lines:

SOCK_CLEANUP;
netsnmp_transport_free(transport);
snmptrapd_close_sessions(sess_list); // next;
    snmp_close(s); //

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