aboutsummaryrefslogtreecommitdiffstats
path: root/sysconfig/network-scripts/network-functions
blob: 928001499604e27e5edc60e89a23afbe434426c3 (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
# -*-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

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

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

need_config ()
{
    CONFIG="ifcfg-${1}"
    [ -f "${CONFIG}" ] && return
    CONFIG="${1}"
    [ -f "${CONFIG}" ] && return
    local addr=`get_hwaddr ${1}`
    if [ -n "$addr" ]; then
      local nconfig=`get_config_by_hwaddr ${addr}`
      if [ -n "$nconfig" ] ; then
        CONFIG=$nconfig
	[ -f "${CONFIG}" ] && return
      fi
    fi
}

source_config ()
{
    DEVNAME=`basename $CONFIG | sed 's/^ifcfg-//g'`
    if echo ${CONFIG##*/} | grep -q '[^g]-' ; then
	PARENTCONFIG=`echo $CONFIG | sed 's/-[^-]*$//g'`
	PARENTDEVNAME=${PARENTCONFIG##*/ifcfg-}
	[ -f $PARENTCONFIG ] || {
	    echo $"Missing config file $PARENTCONFIG." >&2
	    exit 1
	}
	. $PARENTCONFIG
	[ -r "keys-$PARENTDEVNAME" ] && . keys-$PARENTDEVNAME
    fi
    . $CONFIG
    [ -r "keys-$DEVNAME" ] && . 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"
		;;
	IUCV)
		DEVICETYPE="iucv"
		;;

    esac
    [ -z "$DEVICETYPE" ] && DEVICETYPE=`echo ${DEVICE} | sed "s/[0-9]*$//"`
    [ -z "$REALDEVICE" -a -n "$PARENTDEVICE" ] && REALDEVICE=$PARENTDEVICE
    [ -z "$REALDEVICE" ] && REALDEVICE=${DEVICE%%:*}
    if [ "${DEVICE}" != "${REALDEVICE}" ]; then
        ISALIAS=yes
    else
	ISALIAS=no
    fi
    if [ -n "$HWADDR" ]; then
        HWADDR=`echo $HWADDR | awk '{ print toupper($0) }'`
    fi
    if [ -n "$MACADDR" ]; then
        MACADDR=`echo $MACADDR | awk '{ print toupper($0) }'`
    fi
}



expand_config ()
{
    if [ -z "${NETMASK}" ]; then
	eval `/bin/ipcalc --netmask ${IPADDR}`
    fi

    if [ -z "${PREFIX}" ]; then
	eval `/bin/ipcalc --prefix ${IPADDR} ${NETMASK}`
    fi

    if [ -z "${BROADCAST}" ]; then
	eval `/bin/ipcalc --broadcast ${IPADDR} ${NETMASK}`
    fi

    if [ -z "${NETWORK}" ]; then
	eval `/bin/ipcalc --network ${IPADDR} ${NETMASK}`
    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
        OWNER=`ls -l $i | awk '{ print $3 }'`
	
        if [ "`id -u`" = "0" ]; then
	  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
  )
}

# rename_device() - Rename a network device to something else
# $1 - desired name
# $2 - hardware address to name
# $3 - list of devices that are already in use
#      (for general calls, use the current device you're trying to
#       change to $1)

rename_device()
{
    /sbin/nameif "$1" "$2" 2>/dev/null || {
      local hw2=`get_hwaddr ${1}`
      local nconfig=`get_config_by_hwaddr ${hw2}`
      local dev=
      if [ -n "$nconfig"  ]; then
         dev=$(. $nconfig ; echo $DEVICE)
         for device in $3 ; do
	    [ "$dev" = "$device" ] && unset dev
         done
      fi 
      [ -z "$dev" ] && dev=dev$RANDOM
      rename_device $dev $hw2 "$3 $1"
      /sbin/nameif "$1" "$2" 2>/dev/null
    }
}

is_available ()
{
    LC_ALL= LANG= ip -o link | grep -q $1
    [ "$?" = "1" ] || return 0

    alias=`modprobe -c | awk "/^(alias|install)[[:space:]]+$1[[:space:]]/ { print \\$3 }"`
    if [ -z "$alias" -o "$alias" = "off" -o "$alias" = "/bin/true" ]; then
        return 2
    fi
    modprobe $1 > /dev/null 2>&1 || {
      return 1
    }
    # if it is a mainframe ccwgroup device, configure it before
    # trying to rename it:
    configure_ccwgroup_device
    if [ -n "$HWADDR" ]; then
       local curdev=`ip -o link | awk -F ':' -vIGNORECASE=1 "/$HWADDR/ { print \\$2 }"`
       if [ -z "$curdev" ]; then
          return 1
       fi
       rename_device "$1" "$HWADDR" "$curdev"
    fi
    LC_ALL= LANG= ip -o link | grep -q $1
    return $?
}

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 ()
{
    if echo $1 | grep -q ':' ; then
     if LC_ALL=C ifconfig -a 2>/dev/null | grep -q $1 ; then
	  return 1
     else
	  return 0
     fi
    else 
     if LC_ALL=C ip -o link ls dev $1 2>/dev/null | grep -q ",UP" ; then
	return 1
     else
	return 0
     fi
    fi
}

check_mii_tool ()
{
   [ -x /sbin/mii-tool ] || return 2
   output=`LC_ALL=C mii-tool $1 2>&1`
   echo $output | LC_ALL=C grep -q "link ok" && return 1
   echo $output | LC_ALL=C grep -q "no link" && return 0 || return 2
}

check_ethtool ()
{
   [ -x /sbin/ethtool ] || return 2
   output=`LC_ALL=C ethtool $1 2>&1`
   echo $output | LC_ALL=C grep -q "Link detected: yes" && return 1
   echo $output | LC_ALL=C grep -q "Link detected: no" && return 0 || return 2
}


check_link_down ()
{
    if [ -x /sbin/mii-tool -o -x /sbin/ethtool ]; then
        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
	while [ $timeout -le 10 ]; do
	    check_mii_tool $1
	    m=$?
	    check_ethtool $1
	    e=$?
	    if [ $m -eq 1 ] || [ $e -eq 1 ] ; then
		return 1
	    fi
	    if [ $m -eq 2 ] && [ $e -eq 2 ] ; then
		return 1
	    fi
	    usleep 500000
	    timeout=$((timeout+1))
	done
	return 0
    fi
    return 1
}

check_default_route ()
{
    LC_ALL=C ip route list match 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 | \
             grep ${GATEWAY} | \
             sed -e 's/.* dev \([:alnum:]*\)/\1/'`
	if [ -n "$dev" ]; then
	    GATEWAYDEV="$dev"
        fi
    fi
}

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 ${WINDOW:+window $WINDOW} dev ${GATEWAYDEV}
            else
                /sbin/ip route add default ${WINDOW:+window $WINDOW} via ${GATEWAY}
            fi
        fi
    elif [ -f /etc/default-route ]; then
	/sbin/ip route add default ${WINDOW:+window $WINDOW} via `cat /etc/default-route`
	rm -f /etc/default-route
    fi
}

is_wireless_device ()
{
    [ -x /sbin/iwconfig ] || return 1
    LC_ALL=C iwconfig $1 2>&1 | grep -q "no wireless extensions" || return 0
    return 1
}

# Mainframe devices:
configure_ccwgroup_device ()
{
    local DIR SYSDIR
    # SUBCHANNELS is only set on mainframe ccwgroup devices
    [ -z "$SUBCHANNELS" -o -z "$NETTYPE" ] && return
    DIR="/sys/bus/ccwgroup/drivers/$NETTYPE"
    SYSDIR="$DIR/${SUBCHANNELS//,*/}"
    [ ! -e $DIR/group ] && return
    echo "$SUBCHANNELS" > $DIR/group
    if [ -n "$PORTNAME" ]; then
         if [ "$NETTYPE" = "lcs" ]; then
		[ -e $SYSDIR/portno ] && echo "$PORTNAME" > $SYSDIR/portno
	 else
		[ -e $SYSDIR/portname ] && echo "$PORTNAME" > $SYSDIR/portname
	 fi
    fi
    if [ "$NETTYPE" = "ctc" -a -n "$CTCPROT" ]; then
         echo "$CTCPROT" > $SYSDIR/protocol
    fi
    if [ -n "$OPTIONS" ]; then
         for i in $OPTIONS; do
               echo "${i//*=/}" > "$SYSDIR/${i//=*/}"
         done
    fi
    [ -e $SYSDIR/online ] && echo 1 > $SYSDIR/online
}

# 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 [ $# -gt 1 ]; then
       let n_args=$#;
       while [ $n_args -gt 0 ]; 
	 do 
	    if [[ "$s" = *$1* ]]; then
	       shift;
	       let n_args=n_args-1;
               continue;
            fi;
	    s="$s$1";
            shift; 
	    if [ $# -gt 0 ]; then
		s="$s"$'\n';
	    fi;
	    let 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
	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;
}