File: IPaddr

package info (click to toggle)
resource-agents 1%3A4.0.0~rc1-4
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 3,644 kB
  • ctags: 2,191
  • sloc: sh: 47,713; ansic: 4,074; perl: 3,457; makefile: 663; xml: 89
file content (892 lines) | stat: -rwxr-xr-x 22,342 bytes parent folder | download | duplicates (3)
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
890
891
892
#!/bin/sh
#
# License:      GNU General Public License (GPL) 
# Support:      users@clusterlabs.org
#
#	This script manages IP alias IP addresses
#
#	It can add an IP alias, or remove one.
#
#	usage: $0 {start|stop|status|monitor|validate-all|meta-data}
#
#	The "start" arg adds an IP alias.
#
#	Surprisingly, the "stop" arg removes one.	:-)
#
#       OCF parameters are as below
#       OCF_RESKEY_ip
#       OCF_RESKEY_broadcast
#       OCF_RESKEY_nic
#       OCF_RESKEY_cidr_netmask
#       OCF_RESKEY_lvs_support  ( e.g. true, on, 1 )
#       OCF_RESKEY_ARP_INTERVAL_MS
#       OCF_RESKEY_ARP_REPEAT
#       OCF_RESKEY_ARP_BACKGROUND (e.g. yes )
#       OCF_RESKEY_ARP_NETMASK
#       OCF_RESKEY_local_start_script
#       OCF_RESKEY_local_stop_script
#
#######################################################################
# 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
SENDARPPIDFILE="$SENDARPPIDDIR/send_arp-$OCF_RESKEY_ip"
USAGE="usage: $0 {start|stop|status|monitor|validate-all|meta-data}";

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

SYSTYPE="`uname -s`"
case "$SYSTYPE" in
    SunOS)
        # `uname -r` = 5.9 -> SYSVERSION = 9
        SYSVERSION="`uname -r | cut -d. -f 2`"
	;;
    Darwin)
	# Treat Darwin the same as the other BSD variants (matched as *BSD)
	SYSTYPE="${SYSTYPE}BSD"
	;;
    *)
        ;;
esac



meta_data() {
        cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="IPaddr">
<version>1.0</version>
<longdesc lang="en">
This script manages IP alias IP addresses
It can add an IP alias, or remove one.
</longdesc>
<shortdesc lang="en">Manages virtual IPv4 addresses (portable 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. (ie, 24), or in
dotted quad notation  255.255.255.0).

If unspecified, the script will also try to determine this from the
routing table.
</longdesc>
<shortdesc lang="en">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.
</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="local_stop_script">
<longdesc lang="en">
Script called when the IP is released
</longdesc>
<shortdesc lang="en">Script called when the IP is released</shortdesc>
<content type="string" default=""/>
</parameter>

<parameter name="local_start_script">
<longdesc lang="en">
Script called when the IP is added
</longdesc>
<shortdesc lang="en">Script called when the IP is added</shortdesc>
<content type="string" default=""/>
</parameter>

<parameter name="ARP_INTERVAL_MS">
<longdesc lang="en">
milliseconds between ARPs
</longdesc>
<shortdesc lang="en">milliseconds between gratuitous ARPs</shortdesc>
<content type="integer" default="500"/>
</parameter>

<parameter name="ARP_REPEAT">
<longdesc lang="en">
How many gratuitous ARPs to send out when bringing up a new address
</longdesc>
<shortdesc lang="en">repeat count</shortdesc>
<content type="integer" default="10"/>
</parameter>

<parameter name="ARP_BACKGROUND">
<longdesc lang="en">
run in background (no longer any reason to do this)
</longdesc>
<shortdesc lang="en">run in background</shortdesc>
<content type="boolean" default="yes"/>
</parameter>

<parameter name="ARP_NETMASK">
<longdesc lang="en">
netmask for ARP - in nonstandard hexadecimal format.
</longdesc>
<shortdesc lang="en">netmask for ARP</shortdesc>
<content type="string" default="ffffffffffff"/>
</parameter>

</parameters>

<actions>
<action name="start"   timeout="20s" />
<action name="stop"    timeout="20s" />
<action name="monitor" depth="0"  timeout="20s" interval="5s" />
<action name="validate-all"  timeout="20s" />
<action name="meta-data"  timeout="5s" />
</actions>
</resource-agent>
END
        exit $OCF_SUCCESS
}

# The 'ping' command takes highly OS-dependent arguments, so this
# function creates a suitable argument list for the host OS's 'ping'.
# We use a subset of its functionality:
# 1. single packet
# 2. reasonable timeout (say 1 second)
#
# arguments:
#	$1: IP address to ping
# result string:
#	arguments for ping command
#
# If more flexibility is needed, they could be specified in the environment
# to this function, to adjust the resulting 'ping' arguments.
#	David Lee <t.d.lee@durham.ac.uk> May 2007
pingargs() {
	_baseip=$1
	_timeout=1	# seconds
	_pktcount=1
	_systype="`uname -s`"
	case $_systype in
		Linux)
			# Default is perpetual ping: need "-c $_pktcount".
			# -c count -t timetolive -q(uiet) -n(umeric) -W timeout
			_pingargs="-c $_pktcount -q -n $_baseip"
			;;
		SunOS)
			# Default is immediate (or timeout) return.
			_pingargs="$_baseip $_timeout"
			;;
		*)
			_pingargs="-c $_pktcount $_baseip"
			;;
	esac

	echo "$_pingargs"
}

#      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.
#
lvs_remove_conflicting_loopback() {
	ipaddr="$1"
	ifname="$2"

	ocf_log info "Removing conflicting loopback $ifname."
	if 
	  echo $ifname > "$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

	if [ ! -z "${OCF_RESKEY_local_stop_script}" ]; then
		if [ -x "${OCF_RESKEY_local_stop_script}" ]; then
			${OCF_RESKEY_local_stop_script} $*
		fi
	fi

	delete_interface "$ifname" "$ipaddr"

	# Forcibly remove the route (if it exists) to the loopback.
	delete_route "$ipaddr"
}

#
#      On Linux systems the (hidden) loopback interface may
#      need to be restored if it has been taken down previously
#      by lvs_remove_conflicting_loopback()
#
lvs_restore_loopback() {
    ipaddr="$1"
    
    if [ ! -s "$VLDIR/$ipaddr" ]; then
	return
    fi

    ifname=`cat "$VLDIR/$ipaddr"`
    ocf_log info "Restoring loopback IP Address $ipaddr on $ifname."
    
    CMD="OCF_RESKEY_cidr_netmask=32 OCF_RESKEY_ip=$1 OCF_RESKEY_nic=$ifname $FINDIF"
    if
      NICINFO=`eval $CMD`
      NICINFO=`echo $NICINFO | tr "	" " " | tr -s " "`
    then
	netmask_text=`echo "$NICINFO" | cut -f3 -d " "`
	broadcast=`echo "$NICINFO" | cut -f5 -d " "`
    else
	echo "ERROR: $CMD failed (rc=$rc)"
	exit $OCF_ERR_GENERIC
    fi
    
    add_interface "$ipaddr" "$ifname" "$ifname" $netmask_text $broadcast
    rm -f "$VLDIR/$ipaddr"
}

#
#      Find out which alias serves the given IP address
#      The argument is an IP address, and its output
#      is an aliased interface name (e.g., "eth0:0").
#
find_interface_solaris() {
    ipaddr="$1"

    $IFCONFIG $IFCONFIG_A_OPT | $AWK '{if ($0 ~ /.*: / && NR > 1) {print "\n"$0} else {print}}' |
    while read ifname linkstuff
    do
	: ifname = $ifname
	read inet addr junk
	: inet = $inet addr = $addr
	while
	read line && [ "X$line" != "X" ]
	do
	    : Nothing
	done
	
	case $ifname in
	    *:*)	;;
	    *)	continue;;
	esac
	
    #  This doesn't look right for a box with multiple NICs.
    #  It looks like it always selects the first interface on
    #  a machine.  Yet, we appear to use the results for this case too...
	ifname=`echo "$ifname" | sed s'%:$%%'`
	
	case $addr in
	    addr:$ipaddr) echo $ifname; return $OCF_SUCCESS;;
            $ipaddr)	  echo $ifname; return $OCF_SUCCESS;;
	esac
     done
  return $OCF_ERR_GENERIC
}

find_interface_bsd() {
    $IFCONFIG $IFCONFIG_A_OPT | awk -v ip_addr="$ipaddr" '
					/UP,/ && $0 ~ /^[a-z]+[0-9]:/ { 
    						if_name=$1; sub(":$","",if_name); 
					}
					$1 == "inet" && $2 == ip_addr {
    						print if_name 
    						exit(0)
					}'

}

#
#	Find out which alias serves the given IP address
#	The argument is an IP address, and its output
#	is an aliased interface name (e.g., "eth0:0").
#
find_interface_generic() {
    ipaddr="$1"
    $IFCONFIG $IFCONFIG_A_OPT  |
    while read ifname linkstuff
    do
	: Read gave us ifname = $ifname
	
	read inet addr junk
	: Read gave us inet = $inet addr = $addr
	
	while
	read line && [ "X$line" != "X" ]
	do
	    : Nothing
	done
	
	case $ifname in
	    *:*)	ifname=`echo $ifname | sed 's/:$//'`;;
	    *)	continue;;
	esac
	
	: "comparing $ipaddr to $addr (from ifconfig)"
	case $addr in
	    addr:$ipaddr)   echo $ifname; return $OCF_SUCCESS;;
	    $ipaddr)	    echo $ifname; return $OCF_SUCCESS;;
	esac
     done
     return $OCF_ERR_GENERIC 
}

#
#       Find out which alias serves the given IP address
#       The argument is an IP address, and its output
#       is an aliased interface name (e.g., "eth0:0").
#
find_interface() {
    ipaddr="$1"
    case "$SYSTYPE" in
	SunOS)
	    NIC=`find_interface_solaris $ipaddr`;;
	*BSD)
	    NIC=`find_interface_bsd $ipaddr`;;
	*)
	    NIC=`find_interface_generic $ipaddr`;;
       esac

  echo $NIC
  return $OCF_SUCCESS;
}

#
#	Find an unused interface/alias name for us to use for new IP alias
#	The argument is an IP address, and the output
#	is an aliased interface name (e.g., "eth0:0", "dc0", "le0:0").
#
find_free_interface() {
    NIC="$1"

    if [ "X$NIC" = "X" ]; then
	ocf_log err "No free interface found for $OCF_RESKEY_ip"
	return $OCF_ERR_GENERIC;
    fi

  NICBASE="$VLDIR/IPaddr-$NIC"
  touch "$NICBASE"

  case "$SYSTYPE" in
	*BSD)
		echo $NIC;
		return $OCF_SUCCESS;;
	SunOS)
		j=1
		IFLIST=`$IFCONFIG $IFCONFIG_A_OPT | \
			grep "^$NIC:[0-9]" | sed 's%: .*%%'`;;
	*)
		j=0
		IFLIST=`$IFCONFIG $IFCONFIG_A_OPT | \
			grep "^$NIC:[0-9]" | sed 's% .*%%'`
                TRYADRCNT=`ls "${NICBASE}:"* 2>/dev/null | wc -w | tr -d ' '`
		if [ -f "${NICBASE}:${TRYADRCNT}" ]; then
		  : OK
		else
		  j="${TRYADRCNT}"
		fi
		;;
  esac

  IFLIST=" `echo $IFLIST` "
  while
     [ $j -lt 512 ]
  do
      case $IFLIST in
	  *" "$NIC:$j" "*)	
		;;
	  *)
		NICLINK="$NICBASE:$j"
		if
		    ln "$NICBASE" "$NICLINK" 2>/dev/null
		then
		    echo "$NIC:$j"
		    return $OCF_SUCCESS
		fi
		;;
       esac
       j=`expr $j + 1`
  done
  return $OCF_ERR_GENERIC
}

delete_route () {
  ipaddr="$1"

  case "$SYSTYPE" in
	SunOS)	return 0;;
	*BSD)	CMD="$ROUTE -n delete -host $ipaddr";;
	*)	CMD="$ROUTE -n del -host $ipaddr";;
  esac

  $CMD

  return $?
}

delete_interface () {
  ifname="$1"
  ipaddr="$2"

  case "$SYSTYPE" in
      SunOS)
		if [ "$SYSVERSION" -ge 8 ] ; then
		    CMD="$IFCONFIG $ifname unplumb"
		else
		    CMD="$IFCONFIG $ifname 0 down"
		fi;;
      Darwin*)
		CMD="$IFCONFIG $ifname $ipaddr delete";;
      *BSD)
		CMD="$IFCONFIG $ifname inet $ipaddr delete";;
      *)
		CMD="$IFCONFIG $ifname down";;
  esac

  ocf_log info "$CMD"
  $CMD

  return $?
}


add_interface () {
  ipaddr="$1"
  iface_base="$2"
  iface="$3"
  netmask="$4"
  broadcast="$5"

  if [ $# != 5 ]; then
      ocf_log err "Insufficient arguments to add_interface: $*"
      exit $OCF_ERR_ARGS
  fi

  case "$SYSTYPE" in
    SunOS)
	  if [ "$SYSVERSION" -ge 8 ] ; then
	      $IFCONFIG $iface plumb
	      rc=$?
	      if [ $rc -ne 0 ] ; then
		  echo "ERROR: '$IFCONFIG $iface plumb' failed."
		  return $rc
	      fi
	  fi
	  # At Solaris 10, this single-command version sometimes broke.
	  # Almost certainly an S10 bug.
	  #	CMD="$IFCONFIG $iface inet $ipaddr $text up"
	  # So hack the following workaround:
	  CMD="$IFCONFIG $iface inet $ipaddr"
	  CMD="$CMD && $IFCONFIG $iface netmask $netmask"
	  CMD="$CMD && $IFCONFIG $iface up"
	  ;;
      
    *BSD)
	  # netmask is always set to 255.255.255.255 for an alias 
	  CMD="$IFCONFIG $iface inet $ipaddr netmask 255.255.255.255 alias";;
    *)		
	  CMD="$IFCONFIG $iface $ipaddr netmask $netmask broadcast $broadcast";;
  esac

  # Use "eval $CMD" (not "$CMD"): it might be a chain of two or more commands.
  ocf_log info "eval $CMD"
  eval $CMD
  rc=$?
  if [ $rc != 0 ]; then
      echo "ERROR: eval $CMD failed (rc=$rc)"
  fi

  return $rc
}

#
#	Remove the IP alias for the requested IP address...
#
ip_stop() {
  SENDARPPIDFILE="$SENDARPPIDDIR/send_arp-$OCF_RESKEY_ip"
  NIC=`find_interface $OCF_RESKEY_ip`

  if [ -f "$SENDARPPIDFILE" ]; then
	cat "$SENDARPPIDFILE" | xargs kill
	rm -f "$SENDARPPIDFILE"
  fi

  if [ -z "$NIC" ]; then
      : Requested interface not in use
      return $OCF_SUCCESS
  fi

  if [ ${OCF_RESKEY_lvs_support} = 1 ]; then 
      case $NIC in
	  lo*)
	      : Requested interface is on loopback
	      return $OCF_SUCCESS;;
      esac
  fi

  delete_route "$OCF_RESKEY_ip"
  delete_interface "$NIC" "$OCF_RESKEY_ip"
  rc=$?

  if [ ${OCF_RESKEY_lvs_support} = 1 ]; then
      lvs_restore_loopback "$OCF_RESKEY_ip"
  fi

  # remove lock file...
  rm -f "$VLDIR/IPaddr-$NIC"

  if [ $rc != 0 ]; then
      ocf_log warn "IP Address $OCF_RESKEY_ip NOT released: rc=$rc"
      return $OCF_ERR_GENERIC
  fi
  return $OCF_SUCCESS
}


#
#	Add an IP alias for the requested IP address...
#
#	It could be that we already have taken it, in which case it should
#	do nothing.
#

ip_start() {
  #
  #	Do we already service this IP address?
  #
    ip_status_internal
    if [ $? = $OCF_SUCCESS ]; then
	# Nothing to do, the IP is already active
	return $OCF_SUCCESS;
    fi

    NIC_unique=`find_free_interface $OCF_RESKEY_nic`
    if [ -n "$NIC_unique" ]; then
	: OK got interface [$NIC_unique] for $OCF_RESKEY_ip 
    else
	return $OCF_ERR_GENERIC
    fi
    
    # This logic is mostly to support LVS (If I understand it correctly)
    if [ ${OCF_RESKEY_lvs_support} = 1 ]; then
	NIC_current=`find_interface $OCF_RESKEY_ip`
	case $NIC_unique in
	    lo*) 
		if [ x"$NIC_unique" = x"$NIC_current" ]; then
		    # Its already "running" and not moving, nothing to do.
		    ocf_log err "Could not find a non-loopback device to move $OCF_RESKEY_ip to"
		    return $OCF_ERR_GENERIC
		fi;;
	    *)   lvs_remove_conflicting_loopback "$OCF_RESKEY_ip" "$NIC_current";;
	esac
    fi

	if [ ! -z "${OCF_RESKEY_local_start_script}" ]; then
		if [ -x "${OCF_RESKEY_local_start_script}" ]; then
			${OCF_RESKEY_local_start_script} $*
		fi
	fi

    add_interface "$OCF_RESKEY_ip" "$OCF_RESKEY_nic" "$NIC_unique" \
		 "$OCF_RESKEY_cidr_netmask" "$OCF_RESKEY_broadcast"
    rc=$?
    if [ $rc != 0 ]; then
	ocf_log err "Could not add $OCF_RESKEY_ip to $OCF_RESKEY_nic: rc=$rc"
	return $rc
    fi

    # The address is active, now notify others about it using sendarp

    if [ "$SYSTYPE" = "DarwinBSD" -a "$NIC_unique" = "lo0" ]; then
	# Darwin can't send ARPs on loopback devices
	SENDARP="x$SENDARP" # Prevent the binary from being found
    fi

    if [ -x $SENDARP ]; then
	TARGET_INTERFACE=`echo $NIC_unique | sed 's%:.*%%'`
	SENDARPPIDFILE="$SENDARPPIDDIR/send_arp-$OCF_RESKEY_ip"    
       
	ARGS="-i $OCF_RESKEY_ARP_INTERVAL_MS -r $OCF_RESKEY_ARP_REPEAT"
	ARGS="$ARGS -p $SENDARPPIDFILE $TARGET_INTERFACE $OCF_RESKEY_ip"
	ARGS="$ARGS auto $OCF_RESKEY_ip $OCF_RESKEY_ARP_NETMASK"

	ocf_log debug "Sending Gratuitous Arp for $OCF_RESKEY_ip on $NIC_unique [$TARGET_INTERFACE]"
	case $OCF_RESKEY_ARP_BACKGROUND in
	    yes) ($SENDARP $ARGS || ocf_log err "Could not send gratuitous arps. rc=$?" & ) >&2 ;;
	    *)   $SENDARP $ARGS || ocf_log err "Could not send gratuitous arps. rc=$?";;
	esac
    fi

    ip_status_internal
    return $?
}

ip_status_internal() {
    NIC=`find_interface "$OCF_RESKEY_ip"`

    if [ "x$NIC" = x ]; then
	return $OCF_NOT_RUNNING

    elif [ "${OCF_RESKEY_lvs_support}" = "1" ]; then 
	case $NIC in
	    lo*) return $OCF_NOT_RUNNING;;
	    *)	 return $OCF_SUCCESS;;
	esac
    else
	if [ x$OCF_RESKEY_nic != x ]; then
	    simple_OCF_NIC=`echo $OCF_RESKEY_nic | awk -F: '{print $1}'`
	    simple_NIC=`echo $NIC | awk -F: '{print $1}'`
	    if [ $simple_OCF_NIC != $simple_NIC ]; then
		ocf_log err "$OCF_RESKEY_ip is running an interface ($simple_NIC) instead of the configured one ($simple_OCF_NIC)"
		return $OCF_ERR_GENERIC
	    fi
	fi
	return $OCF_SUCCESS
    fi
}

ip_status() {
    ip_status_internal
    rc=$?
    if [ $rc = $OCF_SUCCESS ]; then
	echo "running"
    elif [ $rc = $OCF_NOT_RUNNING ]; then
	echo "stopped"
    else
	echo "unknown"
    fi
    return $rc;
}

#
#	Determine if this IP address is really being served, or not.
#	Note that we must distinguish if *we're* serving it locally...
#
ip_monitor() {
    ip_status_internal
    rc=$?

    if [ $OCF_CHECK_LEVEL = 0 -o $rc != 0 ]; then
	return $rc
    fi
    
    ocf_log info "Checking IP stack"

    PINGARGS="`pingargs $OCF_RESKEY_ip`"
    for j in 1 2 3 4 5 6 7 8 9 10; do
        MSG=`$PING $PINGARGS 2>&1`
        if [ $? = 0 ]; then
            return $OCF_SUCCESS
        fi
    done

    ocf_log err "$MSG"
    return $OCF_ERR_GENERIC
}

is_positive_integer() {
    ocf_is_decimal $1 && [ $1 -ge 1 ]
    if [ $? = 0 ]; then
	return 1
    fi
    return 0
}

ip_validate_all() {
    : ${OCF_RESKEY_ARP_BACKGROUND=yes}
    : ${OCF_RESKEY_ARP_NETMASK=ffffffffffff}
    : ${OCF_RESKEY_ARP_INTERVAL_MS=500}
    : ${OCF_RESKEY_ARP_REPEAT=10}


    check_binary $AWK
    check_binary $IFCONFIG
    check_binary $ROUTE
    check_binary $PING

    if is_positive_integer $OCF_RESKEY_ARP_INTERVAL_MS
    then
	ocf_log err "Invalid parameter value: ARP_INTERVAL_MS [$OCF_RESKEY_ARP_INTERVAL_MS]"
	return $OCF_ERR_ARGS
    fi

    if is_positive_integer $OCF_RESKEY_ARP_REPEAT
    then
	ocf_log err "Invalid parameter value: ARP_REPEAT [$OCF_RESKEY_ARP_REPEAT]"
	return $OCF_ERR_ARGS
    fi

    : ${OCF_RESKEY_lvs_support=0}
    if [ "$SYSTYPE" = "Linux" -o "$SYSTYPE" = "SunOS" ]; then
	:
    else 
	if [ "${OCF_RESKEY_lvs_support}" = "1" ]; then
	    ocf_log err "$SYSTYPE does not support LVS"
	    return $OCF_ERR_GENERIC
	fi
    fi

    case $OCF_RESKEY_ip in
	"")	ocf_log err "Required parameter OCF_RESKEY_ip is missing"
	    return $OCF_ERR_CONFIGURED;;
        [0-9]*.[0-9]*.[0-9]*.*[0-9])	: OK;;
	*)	ocf_log err "Parameter OCF_RESKEY_ip [$OCF_RESKEY_ip] not an IP address"
	    return $OCF_ERR_CONFIGURED;;
    esac

    # Unconditionally do this?
    case $OCF_RESKEY_nic in
        *:*)
            OCF_RESKEY_nic=`echo $OCF_RESKEY_nic | sed 's/:.*//'`
            ;;
    esac

    NICINFO=`$FINDIF`
    rc=$?

    if [ $rc != 0 ]; then
	ocf_log err "$FINDIF failed [rc=$rc]."
	return $OCF_ERR_GENERIC
    fi
    
    tmp=`echo "$NICINFO" | cut -f1`
    if
      [ "x$OCF_RESKEY_nic" = "x" ]
    then
      ocf_log info "Using calculated nic for ${OCF_RESKEY_ip}: $tmp"
      OCF_RESKEY_nic=$tmp
    elif
      [ x$tmp != x${OCF_RESKEY_nic} ]
    then
      ocf_log err "Invalid parameter value: nic [$OCF_RESKEY_nic] Calculated nic: [$tmp]"
      return $OCF_ERR_ARGS
    fi

    tmp=`echo "$NICINFO" | cut -f2 | cut -d ' ' -f2`
    if
      [ "x$OCF_RESKEY_cidr_netmask" != "x$tmp" ]
    then
      ocf_log info "Using calculated netmask for ${OCF_RESKEY_ip}: $tmp"
    fi

    # Always use the calculated version becuase it might have been specified 
    #  using CIDR notation which not every system accepts
    OCF_RESKEY_netmask=$tmp
    OCF_RESKEY_cidr_netmask=$tmp; export OCF_RESKEY_cidr_netmask
    
    tmp=`echo "$NICINFO" | cut -f3 | cut -d ' ' -f2`
    if
      [ "x$OCF_RESKEY_broadcast" = "x" ]
    then
      ocf_log debug "Using calculated broadcast for ${OCF_RESKEY_ip}: $tmp"
      OCF_RESKEY_broadcast=$tmp

    elif [ x$tmp != x${OCF_RESKEY_broadcast} ]; then
      ocf_log err "Invalid parameter value: broadcast [$OCF_RESKEY_broadcast] Calculated broadcast: [$tmp]"
      return $OCF_ERR_ARGS
    fi
    
    return $OCF_SUCCESS
}
  
usage() {
    echo $USAGE >&2
    return $1
}

if [ $# -ne 1 ]; then
    usage $OCF_ERR_ARGS
fi

: ${OCF_RESKEY_lvs_support=0}
# Normalize the value of lvs_support
if [ "${OCF_RESKEY_lvs_support}" = "true" \
    -o "${OCF_RESKEY_lvs_support}" = "on" \
    -o "${OCF_RESKEY_lvs_support}" = "yes" \
    -o "${OCF_RESKEY_lvs_support}" = "1" ]; then
    OCF_RESKEY_lvs_support=1
else
    OCF_RESKEY_lvs_support=0
fi

# Note: We had a version out there for a while which used
# netmask instead of cidr_netmask. So, 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

case $1 in
    meta-data)		meta_data;;
    start)		ip_validate_all	&& ip_start;;
    stop)		ip_stop;;
    status)		ip_status;;
    monitor)		ip_monitor;;
    validate-all)	ip_validate_all;;
    usage)		usage $OCF_SUCCESS;;
    *)			usage $OCF_ERR_UNIMPLEMENTED;;
esac

exit $?