/*
* 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));
}
}
/*
* 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* (which is no longer valid).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));
}
}
static int
subagent_shutdown(int majorID, int minorID, void *serverarg, void *clientarg)
{
netsnmp_session *thesession = (netsnmp_session *)clientarg;
DEBUGMSGTL(("agentx/subagent", "shutting down session....\n"));
if (thesession == NULL) {
DEBUGMSGTL(("agentx/subagent", "Empty session to shutdown\n"));
main_session = NULL;
return 0;
}
agentx_close_session(thesession, AGENTX_CLOSE_SHUTDOWN);
snmp_close(thesession);
main_session = NULL;
DEBUGMSGTL(("agentx/subagent", "shut down finished.\n"));
return 1;
}
