119 lines
3.0 KiB
C
119 lines
3.0 KiB
C
/*****************************************************************************
|
|
*
|
|
* ntpsnmpd.c
|
|
*
|
|
* The NTP SNMP daemon is an Agent X subagent application that
|
|
* registers itself with a running SNMP Agent X master process running
|
|
* on the same machine on port TCP 705. It utilizes the libntqp library
|
|
* which accesses status and general data of a running ntpd process on
|
|
* the same machine and enables the user to monitor the status of a
|
|
* ntp daemon process via SNMP.
|
|
*
|
|
* This started as a Google Summer of Code 2008 project,
|
|
* including the ntpsnmpd sub agent and the libntpq library.
|
|
*
|
|
* For more information please visit
|
|
* http://support.ntp.org/bin/view/Dev/GSoC2008snmp
|
|
* Or contact:
|
|
* Harlan Stenn (Mentor) at stenn@ntp.org
|
|
* Heiko Gerstung (Student) at gerstung@ntp.org
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include <ntp_snmp.h>
|
|
#include <signal.h>
|
|
#include <sys/time.h>
|
|
|
|
#ifdef SOLARIS /* needed with at least Solaris 8 */
|
|
#include <siginfo.h>
|
|
#endif
|
|
|
|
#include <libntpq.h>
|
|
#include <ntpsnmpd-opts.h>
|
|
|
|
static int keep_running;
|
|
RETSIGTYPE stop_server(int);
|
|
|
|
RETSIGTYPE
|
|
stop_server(int a) {
|
|
keep_running = 0;
|
|
}
|
|
|
|
/* The main function just sets up a few things and then enters a loop in which it will
|
|
* wait for SNMP requests coming from the master agent
|
|
*/
|
|
|
|
int
|
|
main (int argc, char **argv) {
|
|
int background = 0; /* start as background process */
|
|
int use_syslog = 1; /* use syslog for logging */
|
|
|
|
{
|
|
int optct = optionProcess(&ntpsnmpdOptions, argc, argv);
|
|
argc -= optct;
|
|
argv += optct;
|
|
}
|
|
|
|
if (!HAVE_OPT(NOFORK))
|
|
background = 1;
|
|
|
|
if (!HAVE_OPT(SYSLOG))
|
|
use_syslog = 0;
|
|
|
|
/* using the net-snmp syslog facility */
|
|
if (use_syslog)
|
|
snmp_enable_calllog();
|
|
else
|
|
snmp_enable_stderrlog();
|
|
|
|
/* Become Subagent */
|
|
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_ROLE, 1);
|
|
|
|
/* go into background mode, if requested */
|
|
if (background && netsnmp_daemonize(1, !use_syslog))
|
|
exit(1);
|
|
|
|
/* Now register with the master Agent X process */
|
|
|
|
/* call Netsnmp socket startup macro, which will initialize the network stuff if required */
|
|
SOCK_STARTUP;
|
|
|
|
/* Set AgentX socket interface */
|
|
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
|
|
NETSNMP_DS_AGENT_X_SOCKET, OPT_ARG( AGENTXSOCKET ));
|
|
|
|
init_agent("ntpsnmpd");
|
|
|
|
/* Try to connect to ntpd */
|
|
if ( ntpq_openhost("localhost", 0) == 0 )
|
|
{
|
|
fprintf(stderr, "Error: Could not connect to ntpd. Aborting.\n");
|
|
exit(1);
|
|
}
|
|
|
|
|
|
/* Register callback functions ... */
|
|
init_ntpSnmpSubagentObject();
|
|
init_snmp("ntpsnmpd");
|
|
|
|
/* Signal handler */
|
|
keep_running = 1;
|
|
signal(SIGTERM, stop_server);
|
|
signal(SIGINT, stop_server);
|
|
|
|
snmp_log(LOG_INFO,"ntpsnmpd started.\n");
|
|
|
|
/* main loop here... */
|
|
while(keep_running) {
|
|
agent_check_and_process(1); /* 0 == don't block */
|
|
}
|
|
|
|
/* at shutdown time */
|
|
ntpq_closehost();
|
|
snmp_shutdown("ntpsnmpd");
|
|
SOCK_CLEANUP;
|
|
|
|
return 0;
|
|
}
|
|
|