Ejemplo n.º 1
0
/*
 * check a session validity for connectivity to the master agent.  If
 * not functioning, close and start attempts to reopen the session 
 */
void
agentx_check_session(unsigned int clientreg, void *clientarg)
{
    netsnmp_session *ss = (netsnmp_session *) clientarg;
    if (!ss) {
        if (clientreg)
            snmp_alarm_unregister(clientreg);
        return;
    }
    DEBUGMSGTL(("agentx/subagent", "checking status of session %p\n", ss));

    if (!agentx_send_ping(ss)) {
        snmp_log(LOG_WARNING,
                 "AgentX master agent failed to respond to ping.  Attempting to re-register.\n");
        /*
         * master agent disappeared?  Try and re-register.
         * close first, just to be sure .
         */
        agentx_unregister_callbacks(ss);
        agentx_close_session(ss, AGENTX_CLOSE_TIMEOUT);
        snmp_alarm_unregister(clientreg);       /* delete ping alarm timer */
        snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
                            SNMPD_CALLBACK_INDEX_STOP, (void *) ss);
        snmp_close(main_session);
        main_session = NULL;
        agentx_reopen_session(0, NULL);
    } else {
        DEBUGMSGTL(("agentx/subagent", "session %p responded to ping\n",
                    ss));
    }
}
Ejemplo n.º 2
0
/*
 * check a session validity for connectivity to the master agent.  If
 * not functioning, close and start attempts to reopen the session
 */
void agentx_check_session (unsigned int clientreg, void *clientarg)
{
    netsnmp_session *ss = (netsnmp_session *) clientarg;

    if (!ss)
    {
        if (clientreg)
            snmp_alarm_unregister (clientreg);
        return;
    }
    DEBUGMSGTL (("agentx/subagent", "checking status of session %p\n", ss));

    if (!agentx_send_ping (ss))
    {
        snmp_log (LOG_WARNING, "AgentX master agent failed to respond to ping.  Attempting to re-register.\n");
        /*
         * master agent disappeared?  Try and re-register.
         * close first, just to be sure .
         */
        agentx_unregister_callbacks (ss);
        agentx_close_session (ss, AGENTX_CLOSE_TIMEOUT);
        snmp_alarm_unregister (clientreg);    /* delete ping alarm timer */
        snmp_call_callbacks (SNMP_CALLBACK_APPLICATION, SNMPD_CALLBACK_INDEX_STOP, (void *) ss);
        register_mib_detach ();
        if (main_session != NULL)
        {
            remove_trap_session (ss);
            snmp_close (main_session);
            /*
             * We need to remove the callbacks attached to the callback
             * session because they have a magic callback data structure
             * which includes a pointer to the main session
             *    (which is no longer valid).
             *
             * Given that the main session is not responsive anyway.
             * it shoudn't matter if we lose some outstanding requests.
             */
            if (agentx_callback_sess != NULL)
            {
                snmp_close (agentx_callback_sess);
                agentx_callback_sess = NULL;

                subagent_init_callback_session ();
            }
            main_session = NULL;
            agentx_reopen_session (0, NULL);
        }
        else
        {
            snmp_close (main_session);
            main_session = NULL;
        }
    }
    else
    {
        DEBUGMSGTL (("agentx/subagent", "session %p responded to ping\n", ss));
    }
}