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libs-ec/EcAlarmSinkSNMP.m
Richard Frith-Macdonald 85dfbfa006 deprecate old error/alert methods
2020-01-27 15:27:57 +00:00

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/** Enterprise Control Configuration and Logging
Copyright (C) 2012 Free Software Foundation, Inc.
Written by: Richard Frith-Macdonald <rfm@gnu.org>
Date: Febrary 2010
Originally developed from 1996 to 2012 by Brainstorm, and donated to
the FSF.
This file is part of the GNUstep project.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02111 USA.
*/
#import <Foundation/Foundation.h>
#import "config.h"
#import "EcAlarm.h"
#import "EcAlarmDestination.h"
#import "EcAlarmSinkSNMP.h"
#import "EcProcess.h"
#import "EcLogger.h"
static EcAlarmSinkSNMP *alarmSink = nil; // The singleton
static NSLock *classLock = nil;
#if defined(WITH_NET_SNMP)
@interface EcAlarmSinkSNMP (Private)
/* Archives the SNMP data to persistent storage so we can re-load it on
* startup. Also stores a description of the active alarms for readability.
*/
- (void) _store;
/* Sends the alarm out as an SNMP trap.
* If forceClear is YES then sends the trap with a cleared severity
* irrespective of the actual severity stored in the alarm object.
*/
- (void) _trap: (EcAlarm*)alarm forceClear: (BOOL)forceClear;
@end
/* The ObjC __block define might conflict with system headers ...
* */
#if defined(__block)
#undef __block
#endif
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <net-snmp/library/snmp_assert.h>
#include <time.h>
static NSString *persistentStore = nil;
static int32_t notificationID = 0;
static NSUInteger managedObjectsCount = 0;
static NSMutableArray *managedObjects = nil;
static NSString *alarmsOID = nil;
static NSString *objectsOID = nil;
static NSString *trapOID = nil;
static netsnmp_tdata *alarmsTable = 0;
static netsnmp_tdata *objectsTable = 0;
/* The following scalar variables are made available via SNMP OIDs.
* The agent will handle all GET and (if applicable) SET requests
* to these variables, changing the values as needed.
*/
static int32_t resyncFlag = 0; /* normally not re-syncing */
static int resyncTimer = 0; /* seconds since started */
static int32_t trapSequenceNumber = 0; /* XXX: set default value */
static int32_t pollHeartBeat = 5; /* heartbeat every 5 minutes */
/* SNMP data structure for an alarm table row entry
*/
struct alarmsTable_entry
{
/* Index
*/
int32_t notificationID;
/* Column values
*/
int32_t perceivedSeverity;
char firstEventDate[32];
size_t firstEventDate_len;
char eventDate[32];
size_t eventDate_len;
char managedObject[128];
size_t managedObject_len;
int32_t eventTypeID;
int32_t probableCauseID;
char specificProblem[256];
size_t specificProblem_len;
char proposedRepairAction[256];
size_t proposedRepairAction_len;
char additionalText[256];
size_t additionalText_len;
char trendIndicator[2];
size_t trendIndicator_len;
int valid;
};
/* SNMP data structure for a managed objects table row entry
*/
struct objectsTable_entry
{
/* Index
*/
char objectID[128];
size_t objectID_len;
int valid;
};
/*
* function declarations
*/
static BOOL
heartbeat(time_t now);
static void
init_EcAlarmSink(void);
static Netsnmp_Node_Handler alarmsTable_handler;
static Netsnmp_Node_Handler objectsTable_handler;
static netsnmp_tdata_row *
alarmsTable_createEntry(int32_t notificationID);
static int
pollHeartBeat_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests);
static netsnmp_tdata_row *
objectsTable_createEntry(NSString *objectID);
/*
* column number definitions for table alarmsTable
*/
#define COLUMN_NOTIFICATIONID 1
#define COLUMN_PERCEIVEDSEVERITY 2
#define COLUMN_FIRSTEVENTDATE 3
#define COLUMN_EVENTDATE 4
#define COLUMN_MANAGEDOBJECT 5
#define COLUMN_IDEVENTTYPE 6
#define COLUMN_IDPROBABLECAUSE 7
#define COLUMN_SPECIFICPROBLEM 8
#define COLUMN_PROPOSEDREPAIRACTION 9
#define COLUMN_ADDITIONALTEXT 10
#define COLUMN_TRENDINDICATOR 11
/*
* column number definitions for table objectsTable
*/
#define COLUMN_OBJECTID 1
@interface EcAlarmSinkSNMP (SNMP)
- (BOOL) snmpClearAlarms: (NSString*)managed;
- (void) snmpHousekeeping;
@end
/* alarmTrap stuff
*/
static oid snmptrap_oid[] = { 1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0 };
static oid *additionalText_oid = 0;
static size_t additionalText_len = 0;
static oid *alarmsTable_oid = 0;
static size_t alarmsTable_len = 0;
static oid *alarmTrap_oid = 0;
static size_t alarmTrap_len = 0;
static oid *eventDate_oid = 0;
static size_t eventDate_len = 0;
static oid *eventType_oid = 0;
static size_t eventType_len = 0;
static oid *firstEventDate_oid = 0;
static size_t firstEventDate_len = 0;
static oid *eventTypeID_oid = 0;
static size_t eventTypeID_len = 0;
static oid *probableCauseID_oid = 0;
static size_t probableCauseID_len = 0;
static oid *notificationID_oid = 0;
static size_t notificationID_len = 0;
static oid *objectID_oid = 0;
static size_t objectID_len = 0;
static oid *objectsTable_oid = 0;
static size_t objectsTable_len = 0;
static oid *perceivedSeverity_oid = 0;
static size_t perceivedSeverity_len = 0;
static oid *pollHeartBeat_oid = 0;
static size_t pollHeartBeat_len = 0;
static oid *proposedRepairAction_oid = 0;
static size_t proposedRepairAction_len = 0;
static oid *resyncFlag_oid = 0;
static size_t resyncFlag_len = 0;
static oid *specificProblem_oid = 0;
static size_t specificProblem_len = 0;
static oid *trapSequenceNumber_oid = 0;
static size_t trapSequenceNumber_len = 0;
static oid *trendIndicator_oid = 0;
static size_t trendIndicator_len = 0;
static int
logSNMP(int major, int minor, void* server, void* client)
{
struct snmp_log_message *slm = (struct snmp_log_message *)server;
if (nil == EcProc)
{
NSLog(@"%s", slm->msg);
}
else
{
switch (slm->priority)
{
case LOG_EMERG:
case LOG_ALERT:
case LOG_CRIT:
[[EcLogger loggerForType: LT_ALERT] log: @"%s", slm->msg];
break;
case LOG_ERR:
[[EcLogger loggerForType: LT_ERROR] log: @"%s", slm->msg];
break;
case LOG_WARNING:
case LOG_NOTICE:
case LOG_INFO:
case LOG_DEBUG:
default:
NSLog(@"%s", slm->msg); break;
}
}
return 0;
}
static const char *
stringFromDate(NSDate *d)
{
NSCalendarDate *c;
c = [NSCalendarDate dateWithTimeIntervalSinceReferenceDate:
[d timeIntervalSinceReferenceDate]];
[c setCalendarFormat: @"%Y%m%d %H:%M:%S"];
return [[c description] UTF8String];
}
/* Function to send heartbeat alarm iff the pollHeartBeat interval has passed.
*/
static BOOL
heartbeat(time_t now)
{
static time_t last = 0;
struct tm *t;
char timestamp[18];
netsnmp_variable_list *var_list = NULL;
const char *trapName = "HEARTBEAT TRAP";
const int32_t cause = 0;
const int32_t notification = 0;
const int32_t severity = 4;
const int32_t eventType = 2;
/* Build current timestamp and send a heartbeat
*/
now = time(0);
if (((now - last) / 60) < pollHeartBeat)
{
return NO; /* Not yet time for a heartbeat */
}
last = now;
t = gmtime(&now);
sprintf(timestamp, "%04d%02d%02d %02d:%02d:%02d",
t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
t->tm_hour, t->tm_min, t->tm_sec);
/*
* Set the snmpTrapOid.0 value
*/
snmp_varlist_add_variable(&var_list,
snmptrap_oid, OID_LENGTH(snmptrap_oid),
ASN_OBJECT_ID,
(u_char*)alarmTrap_oid,
alarmTrap_len * sizeof(oid));
if (++trapSequenceNumber <= 0) trapSequenceNumber = 1;
snmp_varlist_add_variable(&var_list,
trapSequenceNumber_oid,
trapSequenceNumber_len,
ASN_INTEGER,
(u_char*)&trapSequenceNumber,
sizeof(trapSequenceNumber));
snmp_varlist_add_variable(&var_list,
notificationID_oid,
notificationID_len, ASN_INTEGER,
(u_char*)&notification, /* Special for heartbeat */
sizeof(notification));
snmp_varlist_add_variable(&var_list,
perceivedSeverity_oid,
perceivedSeverity_len,
ASN_INTEGER,
(u_char*)&severity, /* warning */
sizeof(severity));
snmp_varlist_add_variable(&var_list,
firstEventDate_oid,
firstEventDate_len,
ASN_OCTET_STR,
0, /* not required */
0);
snmp_varlist_add_variable(&var_list,
eventDate_oid, eventDate_len,
ASN_OCTET_STR,
(u_char*)timestamp,
strlen(timestamp));
snmp_varlist_add_variable(&var_list,
objectID_oid, objectID_len,
ASN_OCTET_STR,
0, /* not required */
0);
snmp_varlist_add_variable(&var_list,
eventTypeID_oid, eventTypeID_len,
ASN_INTEGER,
(u_char*)&eventType, /* heartbeat */
sizeof(eventType));
snmp_varlist_add_variable(&var_list,
probableCauseID_oid,
probableCauseID_len, ASN_INTEGER,
(u_char*)&cause,
sizeof(cause));
snmp_varlist_add_variable(&var_list,
specificProblem_oid,
specificProblem_len,
ASN_OCTET_STR,
0, /* not required */
0);
snmp_varlist_add_variable(&var_list,
proposedRepairAction_oid,
proposedRepairAction_len,
ASN_OCTET_STR,
0, /* not required */
0);
snmp_varlist_add_variable(&var_list,
additionalText_oid,
additionalText_len,
ASN_OCTET_STR,
(u_char*)trapName,
strlen(trapName));
snmp_varlist_add_variable(&var_list,
trendIndicator_oid,
trendIndicator_len,
ASN_OCTET_STR,
0, /* not required */
0);
/*
* Send the trap to the list of configured destinations
* and clean up
*/
DEBUGMSGTL(("EcAlarmSinkHeartbeat", "Sending trap.\n"));
send_v2trap(var_list);
snmp_free_varbind(var_list);
return YES;
}
static void
setAlarmTableEntry(netsnmp_tdata_row *row, EcAlarm *alarm)
{
struct alarmsTable_entry *e;
const char *s;
[alarm setExtra: (void*)row];
[alarm freeze]; // Once it's in the snmp table, no more change
e = (struct alarmsTable_entry *)row->data;
e->notificationID = [alarm notificationID];
e->perceivedSeverity = [alarm perceivedSeverity];
s = stringFromDate([alarm firstEventDate]);
strcpy(e->firstEventDate, s);
e->firstEventDate_len = strlen(s);
s = stringFromDate([alarm eventDate]);
strcpy(e->eventDate, s);
e->eventDate_len = strlen(s);
s = [[alarm managedObject] UTF8String];
strcpy(e->managedObject, s);
e->managedObject_len = strlen(s);
e->eventTypeID = [alarm eventType];
e->probableCauseID = [alarm probableCause];
s = [[alarm specificProblem] UTF8String];
strcpy(e->specificProblem, s);
e->specificProblem_len = strlen(s);
s = [[alarm proposedRepairAction] UTF8String];
strcpy(e->proposedRepairAction, s);
e->proposedRepairAction_len = strlen(s);
s = [[alarm additionalText] UTF8String];
strcpy(e->additionalText, s);
e->additionalText_len = strlen(s);
e->trendIndicator[0] = [alarm trendIndicator];
if (0 == e->trendIndicator[0])
{
e->trendIndicator_len = 0;
}
else
{
e->trendIndicator_len = 1;
e->trendIndicator[1] = 0;
}
}
/* Regular timer called at one second intervals to check for updates from
* alarm sources, update SNMP tables, generate alerts, and send heartbeats
*/
static void
housekeeping(unsigned int clientreg, void *clientarg)
{
if (0 == resyncFlag)
{
resyncTimer = 0;
}
else
{
/* We automatically leave resync mode after five minutes (300 seconds)
* if resync mode has not been turned off via SNMP.
*/
if (300 <= ++resyncTimer)
{
resyncTimer = 0;
resyncFlag = 0;
}
}
[alarmSink snmpHousekeeping];
}
static void
init_EcAlarmSink(void)
{
netsnmp_handler_registration *reg;
netsnmp_table_registration_info *tinfo;
netsnmp_watcher_info *winfo;
NSString *oidString;
NSUserDefaults *defaults;
NSArray *array;
oid *oids;
int len;
int i;
defaults = [EcProc cmdDefaults];
/* First convert the trap OID from dotted integer format to an array
* of net-snmp oid values.
*/
oidString = trapOID = [[defaults stringForKey: @"TrapOID"] copy];
if (nil == oidString) oidString = trapOID = @"1.3.6.1.4.1.39543.3.0.1";
array = [oidString componentsSeparatedByString: @"."];
alarmTrap_len = [array count];
alarmTrap_oid = (oid*)malloc(sizeof(oid) * alarmTrap_len);
for (i = 0; i < alarmTrap_len; i++)
{
alarmTrap_oid[i] = [[array objectAtIndex: i] intValue];
}
/* Now use the dotted integer format 'alarms' OID as the basis to set up
* all the alarm data OIDs.
* The OID buffer needs to allow for two more OIDs after the 'alarms'
* OID because the alarmsTable (in the alarms OID) has entries in it.
*/
oidString = alarmsOID = [[defaults stringForKey: @"AlarmsOID"] copy];
if (nil == oidString) oidString = alarmsOID = @"1.3.6.1.4.1.39543.1";
array = [oidString componentsSeparatedByString: @"."];
len = [array count];
oids = (oid*)malloc(sizeof(oid) * (len + 2));
for (i = 0; i < len; i++)
{
oids[i] = [[array objectAtIndex: i] intValue];
}
oids[len] = 0; // alarmsTable
oids[len + 1] = 0; // alarmsEntry
alarmsTable_len = len + 1;
alarmsTable_oid = (oid*)malloc(sizeof(oid) * alarmsTable_len);
memcpy(alarmsTable_oid, oids, sizeof(oid) * len + 1);
alarmsTable_oid[len] = 1;
resyncFlag_len = len + 1;
resyncFlag_oid = (oid*)malloc(sizeof(oid) * resyncFlag_len);
memcpy(resyncFlag_oid, oids, sizeof(oid) * len);
resyncFlag_oid[len] = 2;
trapSequenceNumber_len = len + 1;
trapSequenceNumber_oid = (oid*)malloc(sizeof(oid) * trapSequenceNumber_len);
memcpy(trapSequenceNumber_oid, oids, sizeof(oid) * len);
trapSequenceNumber_oid[len] = 3;
pollHeartBeat_len = len + 1;
pollHeartBeat_oid = (oid*)malloc(sizeof(oid) * pollHeartBeat_len);
memcpy(pollHeartBeat_oid, oids, sizeof(oid) * len);
pollHeartBeat_oid[len] = 4;
notificationID_len = len + 3;
notificationID_oid = (oid*)malloc(sizeof(oid) * notificationID_len);
memcpy(notificationID_oid, oids, sizeof(oid) * (len + 2));
notificationID_oid[len+2] = 1;
perceivedSeverity_len = len + 3;
perceivedSeverity_oid = (oid*)malloc(sizeof(oid) * perceivedSeverity_len);
memcpy(perceivedSeverity_oid, oids, sizeof(oid) * (len + 2));
perceivedSeverity_oid[len+2] = 2;
firstEventDate_len = len + 3;
firstEventDate_oid = (oid*)malloc(sizeof(oid) * firstEventDate_len);
memcpy(firstEventDate_oid, oids, sizeof(oid) * (len + 2));
firstEventDate_oid[len+2] = 3;
eventDate_len = len + 3;
eventDate_oid = (oid*)malloc(sizeof(oid) * eventDate_len);
memcpy(eventDate_oid, oids, sizeof(oid) * (len + 2));
eventDate_oid[len+2] = 4;
eventType_len = len + 3;
eventType_oid = (oid*)malloc(sizeof(oid) * eventType_len);
memcpy(eventType_oid, oids, sizeof(oid) * (len + 2));
eventType_oid[len+2] = 6;
probableCauseID_len = len + 3;
probableCauseID_oid = (oid*)malloc(sizeof(oid) * probableCauseID_len);
memcpy(probableCauseID_oid, oids, sizeof(oid) * (len + 2));
probableCauseID_oid[len+2] = 7;
specificProblem_len = len + 3;
specificProblem_oid = (oid*)malloc(sizeof(oid) * specificProblem_len);
memcpy(specificProblem_oid, oids, sizeof(oid) * (len + 2));
specificProblem_oid[len+2] = 8;
proposedRepairAction_len = len + 3;
proposedRepairAction_oid
= (oid*)malloc(sizeof(oid) * proposedRepairAction_len);
memcpy(proposedRepairAction_oid, oids, sizeof(oid) * (len + 2));
proposedRepairAction_oid[len+2] = 9;
additionalText_len = len + 3;
additionalText_oid = (oid*)malloc(sizeof(oid) * additionalText_len);
memcpy(additionalText_oid, oids, sizeof(oid) * (len + 2));
additionalText_oid[len+2] = 10;
trendIndicator_len = len + 3;
trendIndicator_oid = (oid*)malloc(sizeof(oid) * trendIndicator_len);
memcpy(trendIndicator_oid, oids, sizeof(oid) * (len + 2));
trendIndicator_oid[len+2] = 11;
free(oids);
oidString = objectsOID = [[defaults stringForKey: @"ObjectsOID"] copy];
if (nil == oidString) oidString = objectsOID = @"1.3.6.1.4.1.39543.2";
array = [oidString componentsSeparatedByString: @"."];
len = [array count];
objectID_len = len + 3;
objectID_oid = (oid*)malloc(sizeof(oid) * objectID_len);
for (i = 0; i < len; i++)
{
objectID_oid[i] = [[array objectAtIndex: i] intValue];
}
objectID_oid[len] = 1; // objectsTable
objectID_oid[len+1] = 1; // objectsEntry
objectID_oid[len+2] = 1; // objectID
objectsTable_len = len + 1;
objectsTable_oid = (oid*)malloc(sizeof(oid) * objectsTable_len);
memcpy(objectsTable_oid, objectID_oid, sizeof(oid) * objectsTable_len);
/* Create the managed objects table as a read-only item for SNMP.
*/
reg = netsnmp_create_handler_registration(
"objectsTable",
objectsTable_handler,
objectsTable_oid,
objectsTable_len,
HANDLER_CAN_RONLY);
if (NULL == reg)
snmp_perror("register objectsTable");
objectsTable = netsnmp_tdata_create_table("objectsTable", 0);
if (NULL == objectsTable)
snmp_perror("create objectsTable");
tinfo = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info);
netsnmp_table_helper_add_indexes(tinfo,
ASN_OCTET_STR, /* index: objectID */
0);
tinfo->min_column = COLUMN_OBJECTID;
tinfo->max_column = COLUMN_OBJECTID;
if (netsnmp_tdata_register(reg, objectsTable, tinfo) != SNMPERR_SUCCESS)
snmp_perror("register objectsTable tdata");
/* Create the alarms table as a read-only item for SNMP.
*/
reg = netsnmp_create_handler_registration(
"alarmsTable",
alarmsTable_handler,
alarmsTable_oid,
alarmsTable_len,
HANDLER_CAN_RONLY);
if (NULL == reg)
snmp_perror("register alarmsTable");
alarmsTable = netsnmp_tdata_create_table("alarmsTable", 0);
if (NULL == alarmsTable)
snmp_perror("create alarmsTable");
tinfo = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info);
netsnmp_table_helper_add_indexes(tinfo,
ASN_INTEGER, /* index: notificationID */
0);
tinfo->min_column = COLUMN_NOTIFICATIONID;
tinfo->max_column = COLUMN_TRENDINDICATOR;
if (netsnmp_tdata_register(reg, alarmsTable, tinfo) != SNMPERR_SUCCESS)
snmp_perror("register alarmsTable tdata");
/* Register scalar watchers for each of the MIB objects.
*/
reg = netsnmp_create_handler_registration(
"resyncFlag",
NULL,
resyncFlag_oid,
resyncFlag_len,
HANDLER_CAN_RWRITE);
if (NULL == reg)
snmp_perror("register resyncFlag");
winfo = netsnmp_create_watcher_info(&resyncFlag,
sizeof(int32_t), ASN_INTEGER, WATCHER_FIXED_SIZE);
if (netsnmp_register_watched_scalar(reg, winfo) != MIB_REGISTERED_OK)
snmp_perror("register watched resyncFlag");
reg = netsnmp_create_handler_registration(
"trapSequenceNumber",
NULL,
trapSequenceNumber_oid,
trapSequenceNumber_len,
HANDLER_CAN_RONLY);
if (NULL == reg)
snmp_perror("register trapSequenceNumber");
winfo = netsnmp_create_watcher_info(&trapSequenceNumber,
sizeof(int32_t), ASN_INTEGER, WATCHER_FIXED_SIZE);
if (netsnmp_register_watched_scalar(reg, winfo) != MIB_REGISTERED_OK)
snmp_perror("register watched trapSequenceNumber");
reg = netsnmp_create_handler_registration(
"pollHeartBeat",
pollHeartBeat_handler,
pollHeartBeat_oid,
pollHeartBeat_len,
HANDLER_CAN_RWRITE);
if (NULL == reg)
snmp_perror("register pollHeartBeat");
winfo = netsnmp_create_watcher_info(&pollHeartBeat,
sizeof(int32_t), ASN_INTEGER, WATCHER_FIXED_SIZE);
if (netsnmp_register_watched_scalar(reg, winfo) != MIB_REGISTERED_OK)
snmp_perror("register watched pollHeartBeat");
/* get alarms at one second intervals to do housekeeping.
*/
if (snmp_alarm_register(1, SA_REPEAT, housekeeping, NULL) == 0)
snmp_perror("register housekeeping alarm");
}
/*
* create a new row in the table
*/
static netsnmp_tdata_row *
alarmsTable_createEntry(int32_t notificationID)
{
struct alarmsTable_entry *entry;
netsnmp_tdata_row *row;
entry = SNMP_MALLOC_TYPEDEF(struct alarmsTable_entry);
if (!entry)
{
return NULL;
}
row = netsnmp_tdata_create_row();
if (!row)
{
SNMP_FREE(entry);
return NULL;
}
row->data = entry;
entry->notificationID = notificationID;
netsnmp_tdata_row_add_index(row,
ASN_INTEGER, &(entry->notificationID), sizeof(entry->notificationID));
if (netsnmp_tdata_add_row(alarmsTable, row) != SNMPERR_SUCCESS)
snmp_perror("add alarmsTable entry");
return row;
}
static int
pollHeartBeat_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
int32_t *pollHeartBeat_cache = NULL;
int32_t tmp;
DEBUGMSGTL(("EcAlarmSink", "Got pollHeartBeat_handler request:\n"));
switch (reqinfo->mode)
{
case MODE_GET:
snmp_set_var_typed_value(requests->requestvb, ASN_INTEGER,
(u_char*) &pollHeartBeat, sizeof(pollHeartBeat));
break;
case MODE_SET_RESERVE1:
if (requests->requestvb->type != ASN_INTEGER)
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_WRONGTYPE);
break;
case MODE_SET_RESERVE2:
/*
* store old info for undo later
*/
pollHeartBeat_cache = malloc(sizeof(pollHeartBeat));
memcpy(&pollHeartBeat_cache, &pollHeartBeat, sizeof(pollHeartBeat));
if (pollHeartBeat_cache == NULL)
{
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_RESOURCEUNAVAILABLE);
return SNMP_ERR_NOERROR;
}
netsnmp_request_add_list_data(requests,
netsnmp_create_data_list
("EcAlarmSink",
pollHeartBeat_cache, free));
break;
case MODE_SET_ACTION:
/*
* update current
*/
tmp = *(requests->requestvb->val.integer);
if (tmp > 0)
{
pollHeartBeat = tmp;
[alarmSink _store];
DEBUGMSGTL(("EcAlarmSink", "updated pollHeartBeat -> %d\n", tmp));
}
else
{
DEBUGMSGTL(("EcAlarmSink", "ignored pollHeartBeat -> %d\n", tmp));
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_WRONGVALUE);
}
break;
case MODE_SET_UNDO:
pollHeartBeat =
*((int32_t*)netsnmp_request_get_list_data(requests, "EcAlarmSink"));
break;
case MODE_SET_COMMIT:
case MODE_SET_FREE:
/*
* nothing to do
*/
break;
}
return SNMP_ERR_NOERROR;
}
/** handles requests for the alarmsTable table */
static int
alarmsTable_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_request_info *request;
netsnmp_table_request_info *table_info;
struct alarmsTable_entry *table_entry;
DEBUGMSGTL(("EcAlarmSink", "Got alarmsTable_handler request:\n"));
switch (reqinfo->mode)
{
/*
* Read-support (also covers GetNext requests)
*/
case MODE_GET:
for (request = requests; request; request = request->next)
{
table_entry = (struct alarmsTable_entry *)
netsnmp_tdata_extract_entry(request);
table_info = netsnmp_extract_table_info(request);
switch (table_info->colnum)
{
case COLUMN_NOTIFICATIONID:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_integer(request->requestvb, ASN_INTEGER,
table_entry->notificationID);
break;
case COLUMN_PERCEIVEDSEVERITY:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_integer(request->requestvb, ASN_INTEGER,
table_entry->perceivedSeverity);
break;
case COLUMN_FIRSTEVENTDATE:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR,
(u_char *) table_entry->
firstEventDate,
table_entry->firstEventDate_len);
break;
case COLUMN_EVENTDATE:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR,
(u_char *) table_entry->eventDate,
table_entry->eventDate_len);
break;
case COLUMN_MANAGEDOBJECT:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR,
(u_char *) table_entry->
managedObject,
table_entry->managedObject_len);
break;
case COLUMN_IDEVENTTYPE:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_integer(request->requestvb, ASN_INTEGER,
table_entry->eventTypeID);
break;
case COLUMN_IDPROBABLECAUSE:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_integer(request->requestvb, ASN_INTEGER,
table_entry->probableCauseID);
break;
case COLUMN_SPECIFICPROBLEM:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR,
(u_char *) table_entry->
specificProblem,
table_entry->specificProblem_len);
break;
case COLUMN_PROPOSEDREPAIRACTION:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR,
(u_char *) table_entry->
proposedRepairAction,
table_entry->
proposedRepairAction_len);
break;
case COLUMN_ADDITIONALTEXT:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR,
(u_char *) table_entry->
additionalText,
table_entry->additionalText_len);
break;
case COLUMN_TRENDINDICATOR:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR,
(u_char *) table_entry->
trendIndicator,
table_entry->trendIndicator_len);
break;
default:
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHOBJECT);
break;
}
}
break;
}
return SNMP_ERR_NOERROR;
}
/*
* create a new row in the table
*/
static netsnmp_tdata_row *
objectsTable_createEntry(NSString *objectID)
{
struct objectsTable_entry *entry;
netsnmp_tdata_row *row;
const char *str;
entry = SNMP_MALLOC_TYPEDEF(struct objectsTable_entry);
if (!entry)
{
return NULL;
}
row = netsnmp_tdata_create_row();
if (!row)
{
SNMP_FREE(entry);
return NULL;
}
row->data = entry;
str = [objectID UTF8String];
entry->objectID_len = strlen(str);
strcpy(entry->objectID, str);
netsnmp_tdata_row_add_index(row, ASN_OCTET_STR,
entry->objectID, entry->objectID_len);
if (netsnmp_tdata_add_row(objectsTable, row) != SNMPERR_SUCCESS)
snmp_perror("add alarmsTable entry");
return row;
}
/** handles requests for the objectsTable table */
static int
objectsTable_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_request_info *request;
netsnmp_table_request_info *table_info;
struct objectsTable_entry *table_entry;
DEBUGMSGTL(("EcAlarmSink", "Got objectsTable_handler request:\n"));
switch (reqinfo->mode)
{
/*
* Read-support (also covers GetNext requests)
*/
case MODE_GET:
for (request = requests; request; request = request->next)
{
table_entry = (struct objectsTable_entry *)
netsnmp_tdata_extract_entry(request);
table_info = netsnmp_extract_table_info(request);
switch (table_info->colnum)
{
case COLUMN_OBJECTID:
if (!table_entry)
{
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR,
(u_char *) table_entry->objectID,
table_entry->objectID_len);
break;
default:
netsnmp_set_request_error(
reqinfo, request, SNMP_NOSUCHOBJECT);
break;
}
}
break;
}
return SNMP_ERR_NOERROR;
}
@implementation EcAlarmSinkSNMP
+ (EcAlarmSinkSNMP*) alarmSinkSNMP
{
EcAlarmSinkSNMP *sink;
[classLock lock];
sink = [alarmSink retain];
[classLock unlock];
if (nil == sink)
{
sink = [self new];
}
return [sink autorelease];
}
+ (void) initialize
{
if (nil == classLock)
{
classLock = [NSLock new];
}
}
- (NSString*) description
{
return [NSString stringWithFormat:
@"%@\n AlarmsOID: %@\n ObjectsOID:%@\n TrapOID:%@\n SNMP %@",
[super description], alarmsOID, objectsOID, trapOID,
_isRunning ? @"running" : @"not running"];
}
- (id) init
{
[classLock lock];
if (nil == alarmSink)
{
alarmSink = self = [super init];
}
else
{
[self release];
self = [alarmSink retain];
}
[classLock unlock];
return self;
}
- (id) initWithHost: (NSString*)host name: (NSString*)name
{
[classLock lock];
if (nil == alarmSink)
{
alarmSink = self = [super initWithHost: host name: name];
}
else
{
[self release];
self = [alarmSink retain];
}
[classLock unlock];
return self;
}
- (void) run
{
NSAutoreleasePool *pool = [NSAutoreleasePool new];
NSString *p;
NSDictionary *d;
init_snmp_logging();
snmp_disable_filelog();
snmp_disable_stderrlog();
snmp_enable_calllog();
/* register the callback function to record SNMP errors */
snmp_register_callback(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_LOGGING,
logSNMP, NULL);
/* Make us an agentx client.
*/
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_ROLE, 1);
/* Initialize tcpip, if necessary
*/
SOCK_STARTUP;
/* Initialize the agent library to use the standard agentx port
*/
if (nil == _host || [_host isEqual: @""] || [_host isEqual: @"*"])
{
ASSIGN(_host, @"localhost"); // Local host
}
if (nil == _name || [_name isEqual: @""] || [_name isEqual: @"*"])
{
ASSIGN(_name, @"705"); // Standard Agent-X port
}
p = [NSString stringWithFormat: @"tcp:%@:%@", _host, _name];
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_X_SOCKET, [p UTF8String]);
if (0 != init_agent("EcAlarmSink"))
{
NSLog(@"Unable to initialise EcAlarmSink as an SNMP sub-agent");
}
/* Initialize MIB code here
*/
init_EcAlarmSink();
/* Will read gnustep.conf file from standard locations (such as ~/.snmp)
*/
init_snmp("gnustep");
/* Populate tables and set scalar values from contents of files.
*/
p = [[EcProc cmdDataDirectory] stringByAppendingPathComponent: @"SNMP.plist"];
persistentStore = [p copy];
if ([[NSFileManager defaultManager] isReadableFileAtPath: p] == YES
&& (d = [NSDictionary dictionaryWithContentsOfFile: p]) != nil)
{
NSData *archive;
NSEnumerator *enumerator;
EcAlarm *alarm;
NSString *name;
/* get trap and notification numbers.
*/
trapSequenceNumber = [[d objectForKey: @"TrapSequence"] intValue];
notificationID = [[d objectForKey: @"NotificationID"] intValue];
pollHeartBeat = [[d objectForKey: @"PollheartBeat"] intValue];
if (pollHeartBeat < 1) pollHeartBeat = 5;
/* Get managed objects table and copy it into SNMP table structure.
*/
managedObjects = [[d objectForKey: @"ManagedObjects"] mutableCopy];
enumerator = [managedObjects objectEnumerator];
while (nil != (name = [enumerator nextObject]))
{
objectsTable_createEntry(name);
}
/* Get archived current alarms and add them to the active SNMP table.
*/
archive = [[d objectForKey: @"AlarmsActive"] mutableCopy];
if (nil != archive)
{
NS_DURING
{
_alarmsActive
= [[NSUnarchiver unarchiveObjectWithData: archive] retain];
if (NO == [_alarmsActive isKindOfClass: [NSMutableSet class]])
{
NSLog(@"AlarmsActive loaded as bad class: %@",
[_alarmsActive class]);
_alarmsActive = nil;
}
}
NS_HANDLER
{
_alarmsActive = nil;
NSLog(@"AlarmsActive failed to load: %@", localException);
}
NS_ENDHANDLER
}
enumerator = [_alarmsActive objectEnumerator];
while (nil != (alarm = [enumerator nextObject]))
{
static netsnmp_tdata_row *row;
row = alarmsTable_createEntry([alarm notificationID]);
setAlarmTableEntry(row, alarm);
}
}
if (nil == managedObjects)
{
managedObjects = [NSMutableArray new];
}
managedObjectsCount = [managedObjects count];
if (nil == _alarmsActive)
{
_alarmsActive = [NSMutableSet new];
}
[pool release];
pool = [NSAutoreleasePool new];
snmp_log(LOG_INFO,"EcAlarmSinkSNMP startup.\n");
_isRunning = YES;
while (YES == _isRunning)
{
agent_check_and_process(1); /* 0 == don't block */
[pool release];
pool = [NSAutoreleasePool new];
}
[pool release];
snmp_log(LOG_INFO,"EcAlarmSinkSNMP shutdown.\n");
/* at shutdown time */
snmp_shutdown("EcAlarmSink");
SOCK_CLEANUP;
}
- (void) setBackups: (NSArray*)backups
{
if (nil != backups)
{
[NSException raise: NSInvalidArgumentException
format: @"Calling -setBackups: for a sink is not allowed"];
}
}
- (id<EcAlarmDestination>) setDestination: (id<EcAlarmDestination>)destination
{
if (nil != destination)
{
[NSException raise: NSInvalidArgumentException
format: @"Calling -setDestination: for a sink is not allowed"];
}
return nil;
}
@end
@implementation EcAlarmSinkSNMP (Private)
- (void) _store
{
NSMutableDictionary *d;
[_alarmLock lock];
NS_DURING
{
d = [NSMutableDictionary dictionaryWithCapacity: 6];
[d setObject: [NSNumber numberWithInt: notificationID]
forKey: @"NotificationID"];
[d setObject: [NSNumber numberWithInt: trapSequenceNumber]
forKey: @"TrapSequence"];
[d setObject: [NSNumber numberWithInt: pollHeartBeat]
forKey: @"PollHeartBeat"];
[d setObject: managedObjects
forKey: @"ManagedObjects"];
[d setObject: [NSArchiver archivedDataWithRootObject: _alarmsActive]
forKey: @"AlarmsActive"];
[d setObject: _alarmsActive
forKey: @"AlarmsDescription"];
[d writeToFile: persistentStore atomically: YES];
[_alarmLock unlock];
}
NS_HANDLER
{
[_alarmLock unlock];
NSLog(@"Problem storing alarm data to disk ... %@", localException);
}
NS_ENDHANDLER
}
- (void) _trap: (EcAlarm*)alarm forceClear: (BOOL)forceClear
{
NSAutoreleasePool *pool = [NSAutoreleasePool new];
netsnmp_variable_list *var_list = NULL;
int32_t i;
const char *s;
char ti[2];
/*
* Set the snmpTrapOid.0 value
*/
snmp_varlist_add_variable(
&var_list,
snmptrap_oid,
OID_LENGTH(snmptrap_oid),
ASN_OBJECT_ID,
(u_char*)alarmTrap_oid,
alarmTrap_len * sizeof(oid));
/*
* Add any objects from the trap definition
*/
if (++trapSequenceNumber <= 0) trapSequenceNumber = 1;
snmp_varlist_add_variable(
&var_list,
trapSequenceNumber_oid,
trapSequenceNumber_len,
ASN_INTEGER,
(u_char*)&trapSequenceNumber,
sizeof(trapSequenceNumber));
i = (int32_t)[alarm notificationID];
snmp_varlist_add_variable(
&var_list,
notificationID_oid,
notificationID_len,
ASN_INTEGER,
(u_char*)&i, sizeof(i));
if (YES == forceClear)
{
i = EcAlarmSeverityCleared;
}
else
{
i = (int32_t)[alarm perceivedSeverity];
}
snmp_varlist_add_variable(
&var_list,
perceivedSeverity_oid,
perceivedSeverity_len,
ASN_INTEGER,
(u_char*)&i, sizeof(i));
s = stringFromDate([alarm firstEventDate]);
snmp_varlist_add_variable(
&var_list,
firstEventDate_oid,
firstEventDate_len,
ASN_OCTET_STR,
(u_char*)s, strlen(s));
s = stringFromDate([alarm eventDate]);
snmp_varlist_add_variable(
&var_list,
eventDate_oid,
eventDate_len,
ASN_OCTET_STR,
(u_char*)s, strlen(s));
s = [[alarm managedObject] UTF8String];
snmp_varlist_add_variable(
&var_list,
objectID_oid,
objectID_len,
ASN_OCTET_STR,
(u_char*)s, strlen(s));
i = (int32_t)[alarm eventType];
snmp_varlist_add_variable(
&var_list,
eventTypeID_oid,
eventTypeID_len,
ASN_INTEGER,
(u_char*)&i, sizeof(i));
i = (int32_t)[alarm probableCause];
snmp_varlist_add_variable(
&var_list,
probableCauseID_oid,
probableCauseID_len,
ASN_INTEGER,
(u_char*)&i, sizeof(i));
s = [[alarm specificProblem] UTF8String];
snmp_varlist_add_variable(
&var_list,
specificProblem_oid,
specificProblem_len,
ASN_OCTET_STR,
(u_char*)s, strlen(s));
s = [[alarm proposedRepairAction] UTF8String];
snmp_varlist_add_variable(
&var_list,
proposedRepairAction_oid,
proposedRepairAction_len,
ASN_OCTET_STR,
(u_char*)s, strlen(s));
s = [[alarm additionalText] UTF8String];
snmp_varlist_add_variable(
&var_list,
additionalText_oid,
additionalText_len,
ASN_OCTET_STR,
(u_char*)s, strlen(s));
ti[0] = (u_char)[alarm trendIndicator];
ti[1] = 0;
snmp_varlist_add_variable(
&var_list,
trendIndicator_oid,
trendIndicator_len,
ASN_OCTET_STR,
(u_char*)ti, strlen(ti));
/* Send the trap and clean up
*/
send_v2trap(var_list);
snmp_free_varbind(var_list);
[pool release];
}
@end
@implementation EcAlarmSinkSNMP (SNMP)
/* Call this only with the lock locked.
*/
- (BOOL) snmpClearAlarms: (NSString*)managed
{
NSEnumerator *enumerator;
EcAlarm *alarm;
BOOL changed = NO;
/* Enumerate a copy of the _alarmsActive set so that removing objects
* from the set while enumerating is safe.
*/
enumerator = [[_alarmsActive allObjects] objectEnumerator];
while (nil != (alarm = [enumerator nextObject]))
{
if ([[alarm managedObject] hasPrefix: managed])
{
netsnmp_tdata_row *row;
/* Remove from the ObjC table.
*/
[_alarmsActive removeObject: alarm];
/* Find and remove the SNMP table entry.
*/
row = (netsnmp_tdata_row*)[alarm extra];
if (0 != row)
{
struct alarmsTable_entry *entry;
entry = (struct alarmsTable_entry *)
netsnmp_tdata_remove_and_delete_row(alarmsTable,
row);
if (0 != entry)
{
SNMP_FREE(entry);
}
}
/* send the clear for the entry.
*/
[alarmSink _trap: alarm forceClear: YES];
changed = YES;
}
}
return changed;
}
- (void) snmpHousekeeping
{
time_t now;
BOOL changed = NO;
DEBUGMSGTL(("EcAlarmSinkHousekeeping", "Timer called.\n"));
[_alarmLock lock];
if (NO == _inTimeout && YES == _isRunning)
{
_inTimeout = YES;
NS_DURING
{
if (0 == resyncFlag)
{
/* Check for alarms.
*/
while ([_alarmQueue count] > 0)
{
id o = [_alarmQueue objectAtIndex: 0];
if (YES == [o isKindOfClass: [EcAlarm class]])
{
EcAlarm *next = (EcAlarm*)o;
EcAlarm *prev = [_alarmsActive member: next];
NSString *m = [next managedObject];
if (nil == prev)
{
[next setFirstEventDate: [next eventDate]];
}
else
{
[next setFirstEventDate: [prev firstEventDate]];
}
if ([next perceivedSeverity] == EcAlarmSeverityCleared)
{
if (nil != prev)
{
netsnmp_tdata_row *row;
/* Remove from the ObjC table.
*/
[prev retain];
[_alarmsActive removeObject: prev];
/* Find and remove the SNMP table entry.
*/
row = (netsnmp_tdata_row*)[prev extra];
if (0 != row)
{
struct alarmsTable_entry *entry;
entry = (struct alarmsTable_entry *)
netsnmp_tdata_remove_and_delete_row(
alarmsTable, row);
if (0 != entry)
{
SNMP_FREE(entry);
}
}
/* send the clear for the entry.
*/
[next setNotificationID: [prev notificationID]];
[alarmSink _trap: next forceClear: NO];
[self alarmFwd: next];
[prev release];
changed = YES;
}
}
else
{
/* Register any new managed object.
*/
if (NO == [managedObjects containsObject: m])
{
objectsTable_createEntry(m);
[managedObjects addObject: m];
managedObjectsCount = [managedObjects count];
[self domanageFwd: m];
changed = YES;
}
if ((nil == prev) || ([next perceivedSeverity]
!= [prev perceivedSeverity]))
{
netsnmp_tdata_row *row;
if (nil == prev)
{
/* Add and send the new alarm
*/
if (++notificationID <= 0) notificationID = 1;
[next setNotificationID: notificationID];
row = alarmsTable_createEntry(
[next notificationID]);
}
else
{
prev = [[prev retain] autorelease];
[_alarmsActive removeObject: prev];
row = (netsnmp_tdata_row*)[prev extra];
/* send the clear for the entry.
*/
[next setNotificationID:
[prev notificationID]];
[alarmSink _trap: prev forceClear: YES];
}
/* copy new version of data into row
* and send new severity trap.
*/
setAlarmTableEntry(row, next);
[_alarmsActive addObject: next];
[alarmSink _trap: next forceClear: NO];
[self alarmFwd: next];
changed = YES;
}
}
}
else
{
NSString *s = [o description];
if (YES == [s hasPrefix: @"domanage "])
{
NSString *m = [s substringFromIndex: 9];
changed = [self snmpClearAlarms: m];
if (NO == [managedObjects containsObject: m])
{
objectsTable_createEntry(m);
[managedObjects addObject: m];
managedObjectsCount = [managedObjects count];
changed = YES;
}
}
else if (YES == [s hasPrefix: @"unmanage "])
{
NSString *m = [s substringFromIndex: 9];
if (YES == [managedObjects containsObject: m])
{
const char *str;
netsnmp_tdata_row *row;
changed = YES;
[self snmpClearAlarms: m];
str = [m UTF8String];
row = netsnmp_tdata_row_first(objectsTable);
while (0 != row)
{
struct objectsTable_entry *entry;
entry = (struct objectsTable_entry *)row->data;
if (0 == strcmp(entry->objectID, str))
{
netsnmp_tdata_remove_and_delete_row
(objectsTable, row);
SNMP_FREE(entry);
break;
}
row = netsnmp_tdata_row_next(objectsTable, row);
}
[managedObjects removeObject: m];
if (YES == [m hasSuffix: @"_"])
{
NSEnumerator *e;
NSString *s;
e = [[[managedObjects copy] autorelease]
objectEnumerator];
while (nil != (s = [e nextObject]))
{
if (YES == [s hasPrefix: m])
{
[managedObjects removeObject: s];
}
}
}
managedObjectsCount = [managedObjects count];
}
}
else
{
NSLog(@"ERROR ... unexpected command '%@'", s);
}
}
[_alarmQueue removeObjectAtIndex: 0];
[_alarmLock unlock];
[_alarmLock lock];
}
}
}
NS_HANDLER
{
NSLog(@"Problem in housekeeping timeout: %@", localException);
}
NS_ENDHANDLER
_inTimeout = NO;
}
if (YES == _shouldStop)
{
_isRunning = NO;
}
[_alarmLock unlock];
now = time(0);
if (YES == heartbeat(now))
{
changed = YES;
}
if (YES == changed)
{
[alarmSink _store];
}
}
@end
#else
@implementation EcAlarmSinkSNMP
+ (EcAlarmSinkSNMP*) alarmSinkSNMP
{
EcAlarmSinkSNMP *sink;
[classLock lock];
sink = [alarmSink retain];
[classLock unlock];
if (nil == sink)
{
sink = [self new];
}
return [sink autorelease];
}
+ (void) initialize
{
if (nil == classLock)
{
classLock = [NSLock new];
}
}
- (id) initWithHost: (NSString*)host name: (NSString*)name
{
[classLock lock];
if (nil == alarmSink)
{
alarmSink = self = [super initWithHost: host name: name];
}
else
{
[self release];
self = [alarmSink retain];
}
[classLock unlock];
return self;
}
@end
#endif
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