132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/* $NetBSD: ntpsnmpd.c,v 1.1.1.1 2009/12/13 16:56:33 kardel Exp $ */
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/*****************************************************************************
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*
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* ntpsnmpd.c
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*
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* The NTP SNMP daemon is an Agent X subagent application that
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* registers itself with a running SNMP Agent X master process running
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* on the same machine on port TCP 705. It utilizes the libntqp library
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* which accesses status and general data of a running ntpd process on
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* the same machine and enables the user to monitor the status of a
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* ntp daemon process via SNMP.
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*
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* This started as a Google Summer of Code 2008 project,
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* including the ntpsnmpd sub agent and the libntpq library.
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*
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* For more information please visit
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* http://support.ntp.org/bin/view/Dev/GSoC2008snmp
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* Or contact:
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* Harlan Stenn (Mentor) at stenn@ntp.org
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* Heiko Gerstung (Student) at gerstung@ntp.org
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*
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****************************************************************************/
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#include <signal.h>
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#include <sys/time.h>
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#ifdef SOLARIS /* needed with at least Solaris 8 */
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#include <siginfo.h>
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#endif
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#include <net-snmp/net-snmp-config.h>
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#include <net-snmp/net-snmp-includes.h>
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#include <net-snmp/agent/net-snmp-agent-includes.h>
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#include <ntpSnmpSubagentObject.h>
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#undef PACKAGE_BUGREPORT
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#undef PACKAGE_NAME
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#undef PACKAGE_STRING
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#undef PACKAGE_TARNAME
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#undef PACKAGE_VERSION
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#include <libntpq.h>
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#include <ntpsnmpd-opts.h>
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static int keep_running;
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RETSIGTYPE
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stop_server(int a) {
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keep_running = 0;
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}
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/* The main function just sets up a few things and then enters a loop in which it will
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* wait for SNMP requests coming from the master agent
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*/
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int
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main (int argc, char **argv) {
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int background = 0; /* start as background process */
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int use_syslog = 1; /* use syslog for logging */
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char varvalue[1024];
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{
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int optct = optionProcess(&ntpsnmpdOptions, argc, argv);
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argc -= optct;
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argv += optct;
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}
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if (!HAVE_OPT(NOFORK))
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background = 1;
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if (!HAVE_OPT(SYSLOG))
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use_syslog = 0;
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/* using the net-snmp syslog facility */
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if (use_syslog)
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snmp_enable_calllog();
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else
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snmp_enable_stderrlog();
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/* Become Subagent */
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netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_ROLE, 1);
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/* go into background mode, if requested */
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if (background && netsnmp_daemonize(1, !use_syslog))
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exit(1);
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/* Now register with the master Agent X process */
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/* call Netsnmp socket startup macro, which will initialize the network stuff if required */
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SOCK_STARTUP;
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/* Set AgentX socket interface */
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netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
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NETSNMP_DS_AGENT_X_SOCKET, "tcp:localhost:705");
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init_agent("ntpsnmpd");
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/* Try to connect to ntpd */
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if ( ntpq_openhost("localhost") == 0 )
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{
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fprintf(stderr, "Error: Could not connect to ntpd. Aborting.\n");
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exit(1);
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}
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/* Register callback functions ... */
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init_ntpSnmpSubagentObject();
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init_snmp("ntpsnmpd");
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/* Signal handler */
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keep_running = 1;
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signal(SIGTERM, stop_server);
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signal(SIGINT, stop_server);
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snmp_log(LOG_INFO,"ntpsnmpd started.\n");
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/* main loop here... */
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while(keep_running) {
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agent_check_and_process(1); /* 0 == don't block */
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}
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/* at shutdown time */
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ntpq_closehost();
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snmp_shutdown("ntpsnmpd");
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SOCK_CLEANUP;
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return 0;
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}
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