This file is indexed.

/usr/lib/ocf/resource.d/heartbeat/IPaddr2 is in cluster-agents 1:1.0.4-0ubuntu2.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
#!/bin/sh
#
#	$Id: IPaddr2.in,v 1.24 2006/08/09 13:01:54 lars Exp $
#
#       OCF Resource Agent compliant IPaddr2 script.
#
# 	Based on work by Tuomo Soini, ported to the OCF RA API by Lars
# 	Marowsky-Brée. Implements Cluster Alias IP functionality too.
#
#	Cluster Alias IP cleanup, fixes and testing by Michael Schwartzkopff
#
#
# Copyright (c) 2003 Tuomo Soini
# Copyright (c) 2004-2006 SUSE LINUX AG, Lars Marowsky-Brée
#                    All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#
#


# TODO: 
# - There ought to be an ocf_run_cmd function which does all logging,
#   timeout handling etc for us
# - Make this the standard IP address agent on Linux; the other
#   platforms simply should ignore the additional parameters OR can use
#   the legacy heartbeat resource script...
# - Check LVS <-> clusterip incompatibilities.
#
#	OCF parameters are as below
#	OCF_RESKEY_ip
#	OCF_RESKEY_broadcast
#	OCF_RESKEY_nic
#	OCF_RESKEY_cidr_netmask
#	OCF_RESKEY_iflabel
#	OCF_RESKEY_mac
#	OCF_RESKEY_clusterip_hash
#	OCF_RESKEY_arp_interval
#	OCF_RESKEY_arp_count
#	OCF_RESKEY_arp_bg
#	OCF_RESKEY_arp_mac
#
#	OCF_RESKEY_CRM_meta_clone
#	OCF_RESKEY_CRM_meta_clone_max


#######################################################################
# Initialization:

: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs

SENDARP=$HA_BIN/send_arp
FINDIF=$HA_BIN/findif
VLDIR=$HA_RSCTMP
SENDARPPIDDIR=$HA_RSCTMP
CIP_lockfile=$HA_RSCTMP/IPaddr2-CIP-${OCF_RESKEY_ip}

#######################################################################

meta_data() {
	cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="IPaddr2">
<version>1.0</version>

<longdesc lang="en">
This Linux-specific resource manages IP alias IP addresses.
It can add an IP alias, or remove one.
In addition, it can implement Cluster Alias IP functionality
if invoked as a clone resource.
</longdesc>

<shortdesc lang="en">Manages virtual IPv4 addresses (Linux specific version)</shortdesc>

<parameters>
<parameter name="ip" unique="1" required="1">
<longdesc lang="en">
The IPv4 address to be configured in dotted quad notation, for example
"192.168.1.1".
</longdesc>
<shortdesc lang="en">IPv4 address</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="nic" unique="0">
<longdesc lang="en">
The base network interface on which the IP address will be brought
online. 

If left empty, the script will try and determine this from the
routing table.

Do NOT specify an alias interface in the form eth0:1 or anything here;
rather, specify the base interface only.

Prerequisite:

There must be at least one static IP address, which is not managed by
the cluster, assigned to the network interface.

If you can not assign any static IP address on the interface,
modify this kernel parameter:
sysctl -w net.ipv4.conf.all.promote_secondaries=1
(or per device)

</longdesc>
<shortdesc lang="en">Network interface</shortdesc>
<content type="string" default="eth0"/>
</parameter>

<parameter name="cidr_netmask">
<longdesc lang="en">
The netmask for the interface in CIDR format
(e.g., 24 and not 255.255.255.0)

If unspecified, the script will also try to determine this from the
routing table.
</longdesc>
<shortdesc lang="en">CIDR netmask</shortdesc>
<content type="string" default=""/>
</parameter>

<parameter name="broadcast">
<longdesc lang="en">
Broadcast address associated with the IP. If left empty, the script will
determine this from the netmask.
</longdesc>
<shortdesc lang="en">Broadcast address</shortdesc>
<content type="string" default=""/>
</parameter>

<parameter name="iflabel">
<longdesc lang="en">
You can specify an additional label for your IP address here.
This label is appended to your interface name.
If a label is specified in nic name, this parameter has no effect.
</longdesc>
<shortdesc lang="en">Interface label</shortdesc>
<content type="string" default=""/>
</parameter>

<parameter name="lvs_support">
<longdesc lang="en">
Enable support for LVS Direct Routing configurations. In case a IP
address is stopped, only move it to the loopback device to allow the
local node to continue to service requests, but no longer advertise it
on the network.
</longdesc>
<shortdesc lang="en">Enable support for LVS DR</shortdesc>
<content type="boolean" default="false"/>
</parameter>

<parameter name="mac">
<longdesc lang="en">
Set the interface MAC address explicitly. Currently only used in case of
the Cluster IP Alias. Leave empty to chose automatically.

</longdesc>
<shortdesc lang="en">Cluster IP MAC address</shortdesc>
<content type="string" default=""/>
</parameter>

<parameter name="clusterip_hash">
<longdesc lang="en">
Specify the hashing algorithm used for the Cluster IP functionality.

</longdesc>
<shortdesc lang="en">Cluster IP hashing function</shortdesc>
<content type="string" default="sourceip-sourceport"/>
</parameter>

<parameter name="unique_clone_address">
<longdesc lang="en">
If true, add the clone ID to the supplied value of ip to create
a unique address to manage 
</longdesc>
<shortdesc lang="en">Create a unique address for cloned instances</shortdesc>
<content type="boolean" default="false"/>
</parameter>

<parameter name="arp_interval">
<longdesc lang="en">
Specify the interval between unsolicited ARP packets in milliseconds.
</longdesc>
<shortdesc lang="en">ARP packet interval in ms</shortdesc>
<content type="integer" default="200"/>
</parameter>

<parameter name="arp_count">
<longdesc lang="en">
Number of unsolicited ARP packets to send.
</longdesc>
<shortdesc lang="en">ARP packet count</shortdesc>
<content type="integer" default="5"/>
</parameter>

<parameter name="arp_bg">
<longdesc lang="en">
Whether or not to send the arp packets in the background.
</longdesc>
<shortdesc lang="en">ARP from background</shortdesc>
<content type="string" default="yes"/>
</parameter>

<parameter name="arp_mac">
<longdesc lang="en">
MAC address to send the ARP packets too.

You really shouldn't be touching this.

</longdesc>
<shortdesc lang="en">ARP MAC</shortdesc>
<content type="string" default="ffffffffffff"/>
</parameter>

<parameter name="flush_routes">
<longdesc lang="en">
Flush the routing table on stop. This is for
applications which use the cluster IP address
and which run on the same physical host that the
IP address lives on. The Linux kernel may force that
application to take a shortcut to the local loopback
interface, instead of the interface the address
is really bound to. Under those circumstances, an
application may, somewhat unexpectedly, continue
to use connections for some time even after the
IP address is deconfigured. Set this parameter in
order to immediately disable said shortcut when the
IP address goes away.
</longdesc>
<shortdesc lang="en">Flush kernel routing table on stop</shortdesc>
<content type="boolean" default="false"/>
</parameter>

</parameters>
<actions>
<action name="start"   timeout="20s" />
<action name="stop"    timeout="20s" />
<action name="status" depth="0"  timeout="20s" interval="10s" />
<action name="monitor" depth="0"  timeout="20s" interval="10s" />
<action name="meta-data"  timeout="5s" />
<action name="validate-all"  timeout="20s" />
</actions>
</resource-agent>
END

	exit $OCF_SUCCESS
}

ip_init() {
	local rc

	if [ X`uname -s` != "XLinux" ]; then
		ocf_log err "IPaddr2 only supported Linux."
		exit $OCF_ERR_INSTALLED
	fi

	if [ X"$OCF_RESKEY_ip" = "X" ]; then
		ocf_log err "IP address (the ip parameter) is mandatory"
		exit $OCF_ERR_CONFIGURED
	fi

	if
          case $__OCF_ACTION in
            start|stop)		ocf_is_root;;
            *)			true;;
          esac
        then
          : YAY!
        else
		ocf_log err "You must be root for $__OCF_ACTION operation."
		exit $OCF_ERR_PERM
	fi

	BASEIP="$OCF_RESKEY_ip"
	BRDCAST="$OCF_RESKEY_broadcast"
	NIC="$OCF_RESKEY_nic"
        # Note: We had a version out there for a while which used
        # netmask instead of cidr_netmask. Don't remove this aliasing code!
        if
          [ ! -z "$OCF_RESKEY_netmask" -a -z "$OCF_RESKEY_cidr_netmask" ]
        then
	  OCF_RESKEY_cidr_netmask=$OCF_RESKEY_netmask
	  export OCF_RESKEY_cidr_netmask
        fi
	NETMASK="$OCF_RESKEY_cidr_netmask"
	IFLABEL="$OCF_RESKEY_iflabel"
	IF_MAC="$OCF_RESKEY_mac"

	LVS_SUPPORT=0
	if [ x"${OCF_RESKEY_lvs_support}" = x"true" \
	    -o x"${OCF_RESKEY_lvs_support}" = x"on" \
	    -o x"${OCF_RESKEY_lvs_support}" = x"1" ]; then
	    LVS_SUPPORT=1
	fi

	IP_INC_GLOBAL=${OCF_RESKEY_CRM_meta_clone_max:-1}
	IP_INC_NO=`expr ${OCF_RESKEY_CRM_meta_clone:-0} + 1`

	if [ $LVS_SUPPORT -gt 0 ] && [ $IP_INC_GLOBAL -gt 1 ]; then
		ocf_log err "LVS and load sharing do not go together well"
		exit $OCF_ERR_CONFIGURED
	fi

	ARP_INTERVAL_MS=${OCF_RESKEY_arp_interval:-200}
	ARP_REPEAT=${OCF_RESKEY_arp_count:-5}
	ARP_BACKGROUND=${OCF_RESKEY_arp_bg:-yes}
	ARP_NETMASK=${OCF_RESKEY_arp_mac:-ffffffffffff}

	if ocf_is_decimal "$IP_INC_GLOBAL" && [ $IP_INC_GLOBAL -gt 0 ]; then
		:
	else
		ocf_log err "Invalid OCF_RESKEY_incarnations_max_global [$IP_INC_GLOBAL], should be positive integer"
		exit $OCF_ERR_CONFIGURED
	fi

	# $FINDIF takes its parameters from the environment
	#
	NICINFO=`$FINDIF -C`
	rc=$?
	if
	  [ $rc -eq 0 ]
        then
	    NICINFO=`echo $NICINFO | sed -e 's/netmask\ //;s/broadcast\ //'`
	    NIC=`echo "$NICINFO" | cut -d" " -f1`
	    NETMASK=`echo "$NICINFO" | cut -d" " -f2`
	    BRDCAST=`echo "$NICINFO" | cut -d" " -f3`
	else
		# findif couldn't find the interface
		if ocf_is_probe; then
			ocf_log info "[$FINDIF -C] failed"
			exit $OCF_NOT_RUNNING
		elif [ "$__OCF_ACTION" = stop ]; then
			ocf_log warn "[$FINDIF -C] failed"
			exit $OCF_SUCCESS
		else
			ocf_log err "[$FINDIF -C] failed"
			exit $rc
		fi
	fi
	
	SENDARPPIDFILE="$SENDARPPIDDIR/send_arp-$BASEIP"

	case $NIC in
	    *:*)
		IFLABEL=$NIC
		NIC=`echo $NIC | sed 's/:.*//'`
		;;
	    *)
		if [ -n "$IFLABEL" ]; then
			IFLABEL=${NIC}:${IFLABEL}
		fi
		;;
	esac

	if [ "$IP_INC_GLOBAL" -gt 1 ] && ! ocf_is_true "$OCF_RESKEY_unique_clone_address"; then
		IP_CIP="yes"
		IP_CIP_HASH="${OCF_RESKEY_clusterip_hash:-sourceip-sourceport}"
		if [ -z "$IF_MAC" ]; then
			# Choose a MAC
			# 1. Concatenate some input together
			# 2. This doesn't need to be a cryptographically
			#    secure hash.
			# 3. Drop everything after the first 6 octets (12 chars)
			# 4. Delimit the octets with ':'
			# 5. Make sure the first octet is odd,
			#    so the result is a multicast MAC
			IF_MAC=`echo $BASEIP $NETMASK $BRDCAST |	\
				md5sum |				\
				sed -e 's#\(............\).*#\1#'	\
				    -e 's#..#&:#g; s#:$##'		\
				    -e 's#^\(.\)[02468aAcCeE]#\11#'`
		fi
		IP_CIP_FILE="/proc/net/ipt_CLUSTERIP/$BASEIP"
	fi
}

#
#	Find out which interface serves the given IP address
#	The argument is an IP address, and its output
#	is an interface name (e.g., "eth0").
#
find_interface() {
	#
	# List interfaces but exclude FreeS/WAN ipsecN virtual interfaces
	#
	local iface=`$IP2UTIL -o -f inet addr show | grep "\ $BASEIP/$NETMASK" \
		| cut -d ' ' -f2 | grep -v '^ipsec[0-9][0-9]*$'`
	echo $iface
	return 0
}

#
#        Delete an interface
#
delete_interface () {
	ipaddr="$1"
	iface="$2"
	netmask="$3"

	CMD="$IP2UTIL -f inet addr delete $ipaddr/$netmask dev $iface"

	ocf_run $CMD || return $OCF_ERR_GENERIC

	if ocf_is_true $OCF_RESKEY_flush_routes; then
	    ocf_run $IP2UTIL route flush cache
	fi

	return $OCF_SUCCESS
}

#
#        Add an interface
#
add_interface () {
	ipaddr="$1"
	netmask="$2"
	broadcast="$3"
	iface="$4"
	label="$5"

	CMD="$IP2UTIL -f inet addr add $ipaddr/$netmask brd $broadcast dev $iface"

	if [ ! -z "$label" ]; then
		CMD="$CMD label $label"
	fi

	ocf_log info "$CMD"
	$CMD

	if [ $? -ne 0 ]; then
		return $OCF_ERR_GENERIC
	fi

	CMD="$IP2UTIL link set $iface up"

	ocf_log info "$CMD"
	$CMD

	return $?
}

#
#        Delete a route
#
delete_route () {
	prefix="$1"
	iface="$2"

	CMD="$IP2UTIL route delete $prefix dev $iface"

	ocf_log info "$CMD"
	$CMD

	return $?
}

#      On Linux systems the (hidden) loopback interface may
#      conflict with the requested IP address. If so, this
#      unoriginal code will remove the offending loopback address
#      and save it in VLDIR so it can be added back in later
#      when the IPaddr is released.
#
#      TODO: This is very ugly and should be controlled by an additional
#      instance parameter. Or even: multi-state, with the IP only being
#      "active" on the master!?
#
remove_conflicting_loopback() {
	ipaddr="$1"
	netmask="$2"
	broadcast="$3"
	ifname="$4"

	ocf_log info "Removing conflicting loopback $ifname."
	if
		echo "$ipaddr $netmask $broadcast $ifname" > "$VLDIR/$ipaddr"
	then
		: Saved loopback information in $VLDIR/$ipaddr
	else
		ocf_log err "Could not save conflicting loopback $ifname." \
		       "it will not be restored."
	fi
	delete_interface "$ipaddr" "$ifname" "$netmask"
	# Forcibly remove the route (if it exists) to the loopback.
	delete_route "$ipaddr" "$ifname"
}

#
#	On Linux systems the (hidden) loopback interface may
#	need to be restored if it has been taken down previously
#	by remove_conflicting_loopback()
#
restore_loopback() {
	ipaddr="$1"

	if [ -s "$VLDIR/$ipaddr" ]; then
		ifinfo=`cat "$VLDIR/$ipaddr"`
		ocf_log info "Restoring loopback IP Address " \
		    "$ifinfo."
		add_interface $ifinfo
		rm -f "$VLDIR/$ipaddr"
	fi
}

#
# Run send_arp to note peers about new mac address
#
run_send_arp() {
	ARGS="-i $ARP_INTERVAL_MS -r $ARP_REPEAT -p $SENDARPPIDFILE $NIC $BASEIP auto not_used not_used"
	if [ "x$IP_CIP" = "xyes" ] ; then
	    if [ x = "x$IF_MAC" ] ; then
		MY_MAC=auto
	    else
		MY_MAC=`echo ${IF_MAC} | sed -e 's/://g'`
	    fi
	    ARGS="-i $ARP_INTERVAL_MS -r $ARP_REPEAT -p $SENDARPPIDFILE $NIC $BASEIP $MY_MAC not_used not_used"
	fi
	ocf_log info "$SENDARP $ARGS"
	case $ARP_BACKGROUND in
	yes) 
		($SENDARP $ARGS || ocf_log err "Could not send gratuitous arps" &) >&2
		;;
	*)
		$SENDARP $ARGS || ocf_log err "Could not send gratuitous arps"
		;;
	esac
}

#
# Run ipoibarping to note peers about new Infiniband address
#
run_send_ib_arp() {
	ARGS="-q -c $ARP_REPEAT -U -I $NIC $BASEIP"
	ocf_log info "ipoibarping $ARGS"
	case $ARP_BACKGROUND in
	yes)
		(ipoibarping $ARGS || ocf_log err "Could not send gratuitous arps" &) >&2
		;;
	*)
		ipoibarping $ARGS || ocf_log err "Could not send gratuitous arps"
		;;
	esac
}

# Do we already serve this IP address?
#
# returns:
# ok = served (for CIP: + hash bucket)
# partial = served and no hash bucket (CIP only)
# partial2 = served and no CIP iptables rule
# no = nothing
#
ip_served() {
	if [ -z "$NIC" ]; then # no nic found or specified
		echo "no"
		return 0
	fi

	cur_nic="`find_interface $BASEIP`"

	if [ -z "$cur_nic" ]; then
		echo "no"
		return 0
	fi

	if [ -z "$IP_CIP" ]; then
		case $cur_nic in
		lo*)	if [ "$LVS_SUPPORT" = "1" ]; then
				echo "no"
				return 0
			fi
			;;
		esac

		echo "ok"
		return 0
	fi

	# Special handling for the CIP:
	if [ ! -e $IP_CIP_FILE ]; then
		echo "partial2"
		return 0
	fi
	if egrep -q "(^|,)${IP_INC_NO}(,|$)" $IP_CIP_FILE ; then
		echo "ok"
		return 0
	else
		echo "partial"
		return 0
	fi

	exit $OCF_ERR_GENERIC
}

#######################################################################

ip_usage() {
	cat <<END
usage: $0 {start|stop|status|monitor|validate-all|meta-data}

Expects to have a fully populated OCF RA-compliant environment set.
END
}

ip_start() {
	if [ -z "$NIC" ]; then # no nic found or specified
		exit $OCF_ERR_CONFIGURED
	fi

	if [ -n "$IP_CIP" ]; then
	    # Cluster IPs need special processing when the first bucket
	    #  is added to the node... take a lock to make sure only one
	    #  process executes that code
	    ocf_take_lock $CIP_lockfile
	    ocf_release_lock_on_exit $CIP_lockfile
	fi

	#
	#	Do we already service this IP address?
	#
	local ip_status=`ip_served`

	if [ "$ip_status" = "ok" ]; then
		exit $OCF_SUCCESS
	fi
	
	if [ -n "$IP_CIP" ] && [ $ip_status = "no" ] || [ $ip_status = "partial2" ]; then
		$MODPROBE ip_conntrack
		$IPTABLES -I INPUT -d $BASEIP -i $NIC -j CLUSTERIP \
				--new \
				--clustermac $IF_MAC \
				--total-nodes $IP_INC_GLOBAL \
				--local-node $IP_INC_NO \
				--hashmode $IP_CIP_HASH
		if [ $? -ne 0 ]; then
			ocf_log err "iptables failed"
			exit $OCF_ERR_GENERIC
		fi
	fi

	if [ -n "$IP_CIP" ] && [ $ip_status = "partial" ]; then
		echo "+$IP_INC_NO" >$IP_CIP_FILE
	fi
	
	if [ "$ip_status" = "no" ]; then
		if [ "$LVS_SUPPORT" = "1" ]; then
			case `find_interface $BASEIP` in
			lo*)
				remove_conflicting_loopback $BASEIP 32 255.255.255.255 lo
				;;
			esac
		fi
		
		add_interface $BASEIP $NETMASK $BRDCAST $NIC $IFLABEL
		
		if [ $? -ne 0 ]; then
			ocf_log err "$CMD failed."
			exit $OCF_ERR_GENERIC
		fi
	fi

	case $NIC in
	lo*)
		: no need to run send_arp on loopback
		;;
	ib*)
		run_send_ib_arp
		;;
	*)
	    if [ -x $SENDARP ]; then
		run_send_arp
	    fi
		;;
	esac
	exit $OCF_SUCCESS
}

ip_stop() {
	local ip_del_if="yes"
	if [ -n "$IP_CIP" ]; then
	    # Cluster IPs need special processing when the last bucket
	    #  is removed from the node... take a lock to make sure only one
	    #  process executes that code
	    ocf_take_lock $CIP_lockfile
	    ocf_release_lock_on_exit $CIP_lockfile
	fi
	
	if [ -f "$SENDARPPIDFILE" ] ; then
		kill `cat "$SENDARPPIDFILE"`
		if [ $? -ne 0 ]; then
			ocf_log warn "Could not kill previously running send_arp for $BASEIP"
		else
			ocf_log info "killed previously running send_arp for $BASEIP"
			rm -f "$SENDARPPIDFILE"
		fi
	fi
	local ip_status=`ip_served`
	ocf_log info "IP status = $ip_status, IP_CIP=$IP_CIP"

	if [ $ip_status = "no" ]; then
		: Requested interface not in use
		exit $OCF_SUCCESS
	fi

	if [ -n "$IP_CIP" ] && [ $ip_status != "partial2" ]; then
		if [ $ip_status = "partial" ]; then
			exit $OCF_SUCCESS
		fi
		echo "-$IP_INC_NO" >$IP_CIP_FILE
		if [ "x$(cat $IP_CIP_FILE)" = "x" ]; then
			ocf_log info $BASEIP, $IP_CIP_HASH
			i=1
			while [ $i -le $IP_INC_GLOBAL ]; do
				ocf_log info $i
				$IPTABLES -D INPUT -d $BASEIP -i $NIC -j CLUSTERIP \
					--new \
					--clustermac $IF_MAC \
					--total-nodes $IP_INC_GLOBAL \
					--local-node $i \
					--hashmode $IP_CIP_HASH
				i=`expr $i + 1`
			done
		else
			ip_del_if="no"		
		fi
	fi
	
	if [ "$ip_del_if" = "yes" ]; then
		delete_interface $BASEIP $NIC $NETMASK
		if [ $? -ne 0 ]; then
			exit $OCF_ERR_GENERIC
		fi
	
		if [ "$LVS_SUPPORT" = 1 ]; then
			restore_loopback "$BASEIP"
		fi
	fi

	exit $OCF_SUCCESS
}

ip_monitor() {
	# TODO: Implement more elaborate monitoring like checking for
	# interface health maybe via a daemon like FailSafe etc...

	local ip_status=`ip_served`
	case $ip_status in
	ok)
		return $OCF_SUCCESS
		;;
	partial|no|partial2)
		exit $OCF_NOT_RUNNING
		;;
	*)
		# Errors on this interface?
		return $OCF_ERR_GENERIC
		;;
	esac
}

ip_validate() {
    check_binary $IP2UTIL
    IP_CIP=

    ip_init

    case "$NIC" in
    ib*) 	check_binary ipoibarping
    		;;
    esac

    if [ -n "$IP_CIP" ]; then
	check_binary $IPTABLES
	check_binary $MODPROBE
    fi

# $BASEIP, $NETMASK, $NIC , $IP_INC_GLOBAL, and $BRDCAST have been checked within ip_init,
# do not bother here.

    if ocf_is_true "$OCF_RESKEY_unique_clone_address" &&
	    ! ocf_is_true "$OCF_RESKEY_CRM_meta_globally_unique"; then
	ocf_log err "unique_clone_address makes sense only with meta globally_unique set"
	exit $OCF_ERR_CONFIGURED
    fi

    if ocf_is_decimal "$ARP_INTERVAL_MS" && [ $ARP_INTERVAL_MS -gt 0 ]; then
	:
    else
	ocf_log err "Invalid OCF_RESKEY_arp_interval [$ARP_INTERVAL_MS]"
	exit $OCF_ERR_CONFIGURED
    fi

    if ocf_is_decimal "$ARP_REPEAT" && [ $ARP_REPEAT -gt 0 ]; then
	:
    else
	ocf_log err "Invalid OCF_RESKEY_arp_count [$ARP_REPEAT]"
	exit $OCF_ERR_CONFIGURED
    fi

    if [ -n "$IP_CIP" ]; then

	local valid=1

	case $IP_CIP_HASH in
	sourceip|sourceip-sourceport|sourceip-sourceport-destport)
		;;
	*)
		ocf_log err "Invalid OCF_RESKEY_clusterip_hash [$IP_CIP_HASH]"
		exit $OCF_ERR_CONFIGURED
		;;
	esac

	if [ "$LVS_SUPPORT" = 1 ]; then
		ecf_log err "LVS and load sharing not advised to try"
		exit $OCF_ERR_CONFIGURED
	fi

	case $IF_MAC in
	[0-9a-zA-Z][13579bBdDfF][!0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][!0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][!0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][!0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][!0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z])
		;;
	*)
		valid=0
		;;
	esac

	if [ $valid -eq 0 ]; then
	  ocf_log err "Invalid IF_MAC [$IF_MAC]"
	  exit $OCF_ERR_CONFIGURED
	fi

    fi
}

if ocf_is_true "$OCF_RESKEY_unique_clone_address"; then
    prefix=`echo $OCF_RESKEY_ip | awk -F. '{print $1"."$2"."$3}'`
    suffix=`echo $OCF_RESKEY_ip | awk -F. '{print $4}'`
    suffix=`expr ${OCF_RESKEY_CRM_meta_clone:-0} + $suffix`
    OCF_RESKEY_ip="$prefix.$suffix"
fi

case $__OCF_ACTION in
meta-data)	meta_data
		;;
usage|help)	ip_usage
		exit $OCF_SUCCESS
		;;
esac

ip_validate

case $__OCF_ACTION in
start)		ip_start
		;;
stop)		ip_stop
		;;
status)		ip_status=`ip_served`
		if [ $ip_status = "ok" ]; then
			echo "running"
			exit $OCF_SUCCESS
		else
			echo "stopped"
			exit $OCF_NOT_RUNNING
		fi
		;;
monitor)	ip_monitor
		;;
validate-all)	;;
*)		ip_usage
		exit $OCF_ERR_UNIMPLEMENTED
		;;
esac