snmp agent not closing trap socket resulting in resource leak

snmp agent is not releasing the socket created for sending traps to
configured manages:

create_trap_session2(const char *sink, const char* sinkport,
                     char *com, int version, int pdutype)
{

    netsnmp_transport *t;
    netsnmp_session session, *sesp;

    memset(&session, 0, sizeof(netsnmp_session));
    session.version = version;
    if (com) {
        session.community = (u_char *) com;
        session.community_len = strlen(com);
    }
...................................................................................
...................................................................................
t = netsnmp_tdomain_transport_full("snmptrap", sink, 0, NULL, sinkport);
if (t != NULL) {
    sesp = snmp_add(&session, t, NULL, NULL);

    if (sesp) {
        return add_trap_session(sesp, pdutype,
                                (pdutype == SNMP_MSG_INFORM), version);
    }
}
...................................................................................
...................................................................................

}

The socket re created every time in ' netsnmp_tdomain_transport_full' call
for the same destination and never getting release resulting in resource
leak and further choking snmp at select call in main():snmpd.c

Why we are not releasing the socket created after sending the trap to
manager or using the same Sessions object (which contain the socket info)
for the same destination?

-Vishal

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