aboutsummaryrefslogtreecommitdiffstats
path: root/sysconfig/network-scripts/network-functions
blob: 5b2f30acea02a0ff792cde6f9e22fd703f6855e2 (plain)
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
# -*-Shell-script-*-
#
# This file is not a stand-alone shell script; it provides functions 
# to network scripts that source it.

# Set up a default search path.
PATH="/sbin:/usr/sbin:/bin:/usr/bin"
export PATH

[ -z "$__sed_discard_ignored_files" ] && . /etc/init.d/functions

get_hwaddr ()
{
    if [ -f /sys/class/net/${1}/address ]; then
	awk '{ print toupper($0) }' < /sys/class/net/${1}/address
    elif [ -d "/sys/class/net/${1}" ]; then
	LC_ALL= LANG= ip -o link show ${1} 2>/dev/null | \
      	    awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/,
					"\\1", 1)); }'
    fi
}

get_config_by_device ()
{
    LANG=C grep -l "^[[:space:]]*DEVICE=${1}\([[:space:]#]\|$\)" \
	/etc/sysconfig/network-scripts/ifcfg-* \
	| LC_ALL=C sed -e "$__sed_discard_ignored_files"
}

get_config_by_hwaddr ()
{
    LANG=C grep -il "^[[:space:]]*HWADDR=\"\?${1}\"\?\([[:space:]#]\|$\)" /etc/sysconfig/network-scripts/ifcfg-* \
	| LC_ALL=C sed -e "$__sed_discard_ignored_files"
}

get_config_by_subchannel ()
{
    LANG=C grep -E -i -l \
	"^[[:space:]]*SUBCHANNELS=['\"]?([0-9]\.[0-9]\.[a-f0-9]+,){0,2}${1}(,[0-9]\.[0-9]\.[a-f0-9]+){0,2}['\"]?([[:space:]]+#|[[:space:]]*$)" \
	/etc/sysconfig/network-scripts/ifcfg-* \
	| LC_ALL=C sed -e "$__sed_discard_ignored_files"
}

get_config_by_name ()
{
    LANG=C grep -E -i -l \
        "^[[:space:]]*NAME=\"(Auto |System )?${1}\"" \
        /etc/sysconfig/network-scripts/ifcfg-* \
	| LC_ALL=C sed -e "$__sed_discard_ignored_files"
}

get_device_by_hwaddr ()
{
    LANG=C ip -o link | awk -F ': ' -vIGNORECASE=1 '!/link\/ieee802\.11/ && /'"$1"'/ { print $2 }'
}

get_uuid_by_config ()
{
    dbus-send --system --print-reply --dest=com.redhat.ifcfgrh1 /com/redhat/ifcfgrh1 com.redhat.ifcfgrh1.GetIfcfgDetails string:"/etc/sysconfig/network-scripts/$1" 2>/dev/null | awk -F '"' '/string / { print $2 }'
}

generate_lease_file_name () {
	local ver=$1
	LEASEFILE="/var/lib/dhclient/dhclient$ver-${DEVICE}.leases"
	if [ -f $LEASEFILE ]; then
		 return
	fi
	LEASEFILE="/var/lib/dhclient/dhclient$ver-${UUID}-${DEVICE}.lease"
}

generate_config_file_name () {
	local ver=$1
	if [ -s /etc/dhcp/dhclient$ver-${DEVICE}.conf ]; then
		DHCLIENTCONF="-cf /etc/dhcp/dhclient$ver-${DEVICE}.conf";
	elif [ -s /etc/dhclient$ver-${DEVICE}.conf ]; then
		DHCLIENTCONF="-cf /etc/dhclient$ver-${DEVICE}.conf";
	else
		DHCLIENTCONF='';
	fi
}

need_config ()
{
    local nconfig

    CONFIG="ifcfg-${1}"
    [ -f "${CONFIG}" ] && return
    CONFIG="${1##*/}"
    [ -f "${CONFIG}" ] && return
    nconfig=$(get_config_by_name "${1}")
    if [ -n "$nconfig" ] && [ -f "$nconfig" ]; then
      CONFIG=${nconfig##*/}
      return
    fi
    local addr=$(get_hwaddr ${1})
    if [ -n "$addr" ]; then
      nconfig=$(get_config_by_hwaddr ${addr})
      if [ -n "$nconfig" ] ; then
        CONFIG=${nconfig##*/}
	[ -f "${CONFIG}" ] && return
      fi
    fi
    nconfig=$(get_config_by_device ${1})
    if [ -n "$nconfig" ] && [ -f "$nconfig" ]; then
      CONFIG=${nconfig##*/}
      return
    fi
}

source_config ()
{
    CONFIG=${CONFIG##*/}
    DEVNAME=${CONFIG##ifcfg-}
    . /etc/sysconfig/network-scripts/$CONFIG
    [ -r "keys-$DEVNAME" ] && . /etc/sysconfig/network-scripts/keys-$DEVNAME
    case "$TYPE" in
    	Ethernet)
		DEVICETYPE="eth"
		;;
	CIPE)
		DEVICETYPE="cipcb"
		;;
	IPSEC)
		DEVICETYPE="ipsec"
		;;
	Modem)
		DEVICETYPE="ppp"
		;;
	xDSL)
		DEVICETYPE="ppp"
		;;
	ISDN)
		DEVICETYPE="ippp"
		;;
	Wireless)
		DEVICETYPE="eth"
		;;
	"Token Ring")
		DEVICETYPE="eth"
		;;
	CTC)
		DEVICETYPE="ctc"
		;;
	GRE | IPIP)
		DEVICETYPE="tunnel"
		;;
	SIT | sit)
		DEVICETYPE="sit"
		;;
	InfiniBand | infiniband)
		DEVICETYPE="ib"
		;;
    esac
    if [ -n "$HWADDR" ]; then
        HWADDR=$(echo $HWADDR | awk '{ print toupper($0) }')
    fi
    if [ -n "$MACADDR" ]; then
        MACADDR=$(echo $MACADDR | awk '{ print toupper($0) }')
    fi
    [ -z "$DEVICE" -a -n "$HWADDR" ] && DEVICE=$(get_device_by_hwaddr $HWADDR)
    [ -z "$DEVICETYPE" ] && DEVICETYPE=$(echo ${DEVICE} | sed "s/[0-9]*$//")
    [ -z "$REALDEVICE" -a -n "$PARENTDEVICE" ] && REALDEVICE=$PARENTDEVICE
    [ -z "$REALDEVICE" ] && REALDEVICE=${DEVICE%%:*}
    [ -z "$SYSCTLDEVICE" ] && SYSCTLDEVICE=${REALDEVICE/.//}
    if [ "${DEVICE}" != "${REALDEVICE}" ]; then
        ISALIAS=yes
    else
	ISALIAS=no
    fi
    ! is_false $NM_CONTROLLED && is_nm_running && _use_nm=true
    if [ -z "$UUID" -a "$_use_nm" = "true" ]; then
	UUID=$(get_uuid_by_config $CONFIG)
    fi
}

ethtool_set()
{
    oldifs=$IFS;
    IFS=';';
    for opts in $ETHTOOL_OPTS ; do
	IFS=$oldifs;
        if [[ "${opts}" =~ [[:space:]]*- ]]; then
	    /sbin/ethtool $opts
        else
	    /sbin/ethtool -s ${REALDEVICE} $opts
        fi
	IFS=';';
    done
    IFS=$oldifs;
}

expand_config ()
{
    local i=0 val
    for idx in '' {0..255} ; do
        ipaddr[$i]=$(eval echo '$'IPADDR$idx)
        if [ -z "${ipaddr[$i]}" ]; then
           [ "$idx" ] && [ $idx -ge 2 ] && break
           continue
        fi
        prefix[$i]=$(eval echo '$'PREFIX$idx)
        netmask[$i]=$(eval echo '$'NETMASK$idx)
        broadcast[$i]=$(eval echo '$'BROADCAST$idx)
        arpcheck[$i]=$(eval echo '$'ARPCHECK$idx)

        if [ "${prefix[$i]}x" != "x" ]; then
            val=$(/bin/ipcalc --netmask "${ipaddr[$i]}/${prefix[$i]}")
            netmask[$i]=${val##NETMASK=}
        fi

        if [ "${netmask[$i]}x" = "x" ]; then
            val=$(/bin/ipcalc --netmask "${ipaddr[$i]}")
            netmask[$i]=${val##NETMASK=}
        fi

        if [ "${prefix[$i]}x" = "x" ]; then
            val=$(/bin/ipcalc --prefix ${ipaddr[$i]} ${netmask[$i]})
            prefix[$i]=${val##PREFIX=}
        fi

        if [ "${broadcast[$i]}x" = "x" ]; then
            val=$(/bin/ipcalc --broadcast ${ipaddr[$i]} ${netmask[$i]})
            broadcast[$i]=${val##BROADCAST=}
        fi

        if [ "${arpcheck[$i]}x" != "x" ]; then
            arpcheck[$i]=${arpcheck[$i]##ARPCHECK=}
            arpcheck[$i]=${arpcheck[$i],,*}
        fi

        i=$((i+1))
    done

    [ -n "$DHCP_HOSTNAME" ] && DHCP_HOSTNAME=${DHCP_HOSTNAME%%.*}

    if [ -z "${NETWORK}" ]; then
        eval $(/bin/ipcalc --network ${ipaddr[0]} ${netmask[0]})
    fi
}

toggle_value ()
{
    if [ "$2" = "yes"  -o "$2" = "YES" ] ; then
	echo "$1 on"
    elif [ "$2" = "no"  -o "$2" = "NO" ] ; then
	echo "$1 off"
    else
	echo ''
    fi
}
 
do_netreport ()
{
  # Notify programs that have requested notification
  ( cd /var/run/netreport || exit
    for i in * ; do
      if [ -f $i ]; then
        if [ "$(id -u)" = "0" ]; then
	  OWNER=$(stat -c %U $i)
	  su -s /bin/bash $OWNER -c "kill -SIGIO $i >/dev/null 2>&1 || rm -f $i >/dev/null 2>&1" > /dev/null 2>&1
	else
	  kill -SIGIO $i >/dev/null 2>&1 || rm -f $i >/dev/null 2>&1
	fi
      fi
    done
  )
}

is_nm_running ()
{
    [ "$(LANG=C nmcli -t --fields running nm status 2>/dev/null)" = "running" ]
}

is_nm_active ()
{
    LANG=C nmcli -t --fields device,state  dev status 2>/dev/null | grep -q "^${1}:connected$"
}

is_nm_device_unmanaged ()
{
    LANG=C nmcli -t --fields GENERAL dev list iface "${1}"  2>/dev/null | awk -F ':' '/GENERAL.STATE/ { if ($2 == "unmanaged") exit 0 ; else exit 1; }'
}

# Sets $alias to the device module if $? != 0
is_available ()
{
    [ -z "$1" ] && return 1

    [ -d "/sys/class/net/$1" ] && return 0

    [ -n "$BONDING_OPTS" ] && install_bonding_driver $1

    alias=$(modprobe -c | awk \
'BEGIN { alias = ""; }
$1 == "alias" && $2 == "'"$1"'" { alias = $3; }
$1 == "install" { install[$2] = $3; }
END {
    cmd = install[alias];
    print alias;
    if (alias == "" || alias == "off" || cmd == "/bin/true" || cmd == ":")
        exit 1;
    exit 0;
}')
    [ $? -eq 0 ] || return 2

    modprobe $1 > /dev/null 2>&1 || {
      return 1
    }
    if [ -n "$HWADDR" ]; then
       local curdev=$(get_device_by_hwaddr "$HWADDR")
       if [ -z "$curdev" ]; then
          return 1
       fi
    fi

    if [ ${alias} = "bonding" ]; then
	install_bonding_driver $1
    fi

    [ -d "/sys/class/net/$1" ] && return 0 || return 1
}

need_hostname ()
{
    CHECK_HOSTNAME=$(hostname)
    if [ "$CHECK_HOSTNAME" = "(none)" -o "$CHECK_HOSTNAME" = "localhost" -o \
	"$CHECK_HOSTNAME" = "localhost.localdomain" ]; then
	return 0
    else
	return 1
    fi
}

set_hostname ()
{
    hostname $1
    if ! grep search /etc/resolv.conf >/dev/null 2>&1; then
	domain=$(echo $1 | sed 's/^[^\.]*\.//')
	if [ -n "$domain" ]; then
		rsctmp=$(mktemp /tmp/XXXXXX);
		cat /etc/resolv.conf > $rsctmp
		echo "search $domain" >> $rsctmp
		change_resolv_conf $rsctmp
		/bin/rm -f $rsctmp
	fi	
    fi
}

check_device_down ()
{
     [ ! -d /sys/class/net/$1 ] && return 0
     if LC_ALL=C ip -o link show dev $1 2>/dev/null | grep -q ",UP" ; then
	return 1
     else
	return 0
     fi
}

check_link_down ()
{
        if ! LC_ALL=C ip link show dev $1 2>/dev/null| grep -q ",UP" ; then
	   ip link set dev $1 up >/dev/null 2>&1
	fi
	timeout=0
	delay=10
	[ -n "$LINKDELAY" ] && delay=$(($LINKDELAY * 2))
	while [ $timeout -le $delay ]; do
	    [ "$(cat /sys/class/net/$REALDEVICE/carrier 2>/dev/null)" != "0" ] && return 1
	    usleep 500000
	    timeout=$((timeout+1))
	done
	return 0
}

check_default_route ()
{
    LC_ALL=C ip route list match 0.0.0.0/0 | grep -q default
}

find_gateway_dev ()
{
    . /etc/sysconfig/network
    if [ -n "${GATEWAY}" -a "${GATEWAY}" != "none" ] ; then
	dev=$(LC_ALL=C /sbin/ip route get to "${GATEWAY}" 2>/dev/null | \
	    sed -n 's/.* dev \([[:alnum:]]*\) .*/\1/p')
	if [ -n "$dev" ]; then
	    GATEWAYDEV="$dev"
        fi
    fi
}

# After the device $1 goes away, restore the standard default route; typically
# used for ppp with DEFROUTE temporarily replacing the "standard" default
# route.
# FIXME: This function doesn't support some newer features (GATEWAY in ifcfg,
# $WINDOW, $METRIC)
add_default_route ()
{
    . /etc/sysconfig/network
    check_default_route && return 0
    find_gateway_dev
    if [ "$GATEWAYDEV" != "" -a -n "${GATEWAY}" -a \
 		"${GATEWAY}" != "none" ]; then
        if ! check_device_down $1; then
            if [ "$GATEWAY" = "0.0.0.0" ]; then
                /sbin/ip route add default dev ${GATEWAYDEV}
            else
                /sbin/ip route add default via ${GATEWAY}
            fi
        fi
    elif [ -f /etc/default-routes ]; then
	while read spec; do
	    /sbin/ip route add $spec
	done < /etc/default-routes
	rm -f /etc/default-routes
    fi
}

is_wireless_device ()
{
    [ -d "/sys/class/net/$1/wireless" ]
}

install_bonding_driver ()
{
   [ -d "/sys/class/net/$1" ] && return 0
   [ ! -f /sys/class/net/bonding_masters ] && ( modprobe bonding || return 1 )
   echo "+$1" > /sys/class/net/bonding_masters 2>/dev/null
   return 0
}

is_bonding_device ()
{
   [ -f "/sys/class/net/$1/bonding/slaves" ]
}

# Invoke this when /etc/resolv.conf has changed:
change_resolv_conf ()
{
    s=$(/bin/grep '^[\ \	]*option' /etc/resolv.conf 2>/dev/null);
    if [ "x$s" != "x" ]; then
       s="$s"$'\n';
    fi;
    if [ $# -gt 1 ]; then
       n_args=$#;
       while [ $n_args -gt 0 ]; 
	 do 
	    case "$s" in *$1*)
	       shift;
	       n_args=$(($n_args-1));
               continue;;
            esac;
	    s="$s$1";
            shift; 
	    if [ $# -gt 0 ]; then
		s="$s"$'\n';
	    fi;
	    n_args=$(($n_args-1));
         done;       
    elif [ $# -eq 1 ]; then
       if [ "x$s" != "x" ]; then
	  s="$s"$(/bin/grep -vF "$s" $1);
       else
	  s=$(cat $1);
       fi;
    fi;
    (echo "$s" > /etc/resolv.conf;) >/dev/null 2>&1;
    r=$?
    if [ $r -eq 0 ]; then
	[ -x /sbin/restorecon ] && /sbin/restorecon /etc/resolv.conf >/dev/null 2>&1 # reset the correct context
	/usr/bin/logger -p local7.notice -t "NET" -i "$0 : updated /etc/resolv.conf";
	[ -e /var/lock/subsys/nscd ] && /usr/sbin/nscd -i hosts; # invalidate cache
    fi;
    return $r;
}

# Logging function
#
# Usage: net_log <message> <err|warning|info> <optional file/function name>
#
# Default level is 'err'.

net_log() {
	local message="$1"
	local level="$2"
	local name="$3"

	[ -z "$message" ] && return 1
	[ -z "$level" ] && level=err
	[ -z "$name" ] && name=$0

	case $level in
	    'debug')
		local txt_level=$"DEBUG    "
		;;
	    'err')
		local txt_level=$"ERROR    "
		;;
	    'warning')
		local txt_level=$"WARN     "
		;;
	    'info')
		local txt_level=$"INFO     "
		;;
	esac

	echo "$txt_level: [$name] $message"

	if [ -x /usr/bin/logger ]; then
		/usr/bin/logger -p daemon.$level -t "$name" "$message"
	fi
	return 0
}