sysconfig/network-scripts/functions.network

   1 #!/bin/sh - keep it for file(1) to get bourne shell script result
   2 #
   3 # $Id$
   4 #
   5 # This is not a shell script; it provides functions to network scripts
   6 # that source it.
   7
   8 source_config ()
   9 {
  10         local foundconfig=0
  11
  12         DEVNAME=${CONFIG##*/}
  13         DEVNAME=${DEVNAME##ifcfg-}
  14         DEVNAME=${DEVNAME##tnlcfg-}
  15
  16         if [[ "$CONFIG" = /* ]]; then
  17                 if [ -f "$CONFIG" ] ; then
  18                         . "$CONFIG"
  19                         foundconfig=1
  20                 fi
  21         elif [ -f "/etc/sysconfig/interfaces/$CONFIG" ] ; then
  22                 . "/etc/sysconfig/interfaces/$CONFIG"
  23                 foundconfig=1
  24         fi
  25
  26         # This is sanity check so that if you've copied ifcfg-eth0 to ifcfg-eth1
  27         # and forgot to alter DEVICE= line you won't accidentally bring down eth0
  28         # while executing ifdown eth1. We do that only if configuration file exists
  29         # (sometimes ifcfg-xyz isn't needed at all like server-side pppoe pppX interfaces)
  30         if [ "$foundconfig" -eq "1" -a "$DEVICE" -a  "$DEVNAME" != "$DEVICE" ]; then
  31                 echo >&2 "$0: DEVICE specified in $CONFIG does not match filename. Aborting!"
  32                 exit 1
  33         fi
  34
  35         if [ "${PREFIX}" ] && [[ "$IPADDR" != */* ]]; then
  36                 IPADDR="$IPADDR/$PREFIX"
  37         fi
  38 }
  39
  40 do_netreport ()
  41 {
  42         # Notify programs that have requested notification
  43         ( cd /var/run/netreport || exit
  44         for i in *; do
  45                 [ -f $i ] && kill -SIGIO $i >/dev/null 2>&1 || \
  46                         rm -f $i >/dev/null 2>&1
  47         done
  48         )
  49 }
  50
  51 need_hostname()
  52 {
  53         local hostname=$(hostname)
  54         if [ "$hostname" = "(none)" -o "$hostname" = "localhost" -o "$hostname" = "localhost.localdomain" ]; then
  55                 NEEDHOSTNAME=yes
  56         else
  57                 unset NEEDHOSTNAME
  58         fi
  59 }
  60
  61 set_hostname()
  62 {
  63         local hostname domain
  64
  65         hostname=$(echo $1 | awk ' { gsub(/\..*$/,NIL); print $0; } ')
  66         domain=$(echo $1 | awk ' { sub(/^[^\.]*\./,NIL); print $0; } ')
  67
  68         if [ "$hostname" ]; then
  69                 echo "$hostname" > /etc/HOSTNAME
  70                 hostname $hostname
  71         fi
  72
  73         if [ "$domain" ]; then
  74                 # XXX umask and possible /etc/resolv.conf symlink breakage
  75                 > /etc/resolv.conf.new
  76                 if ! grep -q "search $domain" /etc/resolv.conf ; then
  77                         echo "search $domain" >> /etc/resolv.conf.new
  78                 fi
  79                 echo "domain $domain" >> /etc/resolv.conf.new
  80                 grep -v "^domain " /etc/resolv.conf >> /etc/resolv.conf.new
  81                 mv -f /etc/resolv.conf.new /etc/resolv.conf
  82         fi
  83 }
  84
  85 set_dhcpclient()
  86 {
  87         if [ "$BOOTPROTO" = "bootp" -o "$BOOTPROTO" = "pump" ]; then
  88                 DHCP_CLIENT=/sbin/pump
  89         fi
  90
  91         if [ -z "$DHCP_CLIENT" ]; then
  92                 if [ -x /sbin/dhcpcd ]; then
  93                         DHCP_CLIENT=/sbin/dhcpcd
  94                 elif [ -x /sbin/dhclient ]; then
  95                         DHCP_CLIENT=/sbin/dhclient
  96                 elif [ -x /sbin/dhcpxd ]; then
  97                         DHCP_CLIENT=/sbin/dhcpxd
  98                 elif [ -x /sbin/pump ]; then
  99                         DHCP_CLIENT=/sbin/pump
 100                 else
 101                         nls "Can't find a DHCP client."
 102                         exit 1
 103                 fi
 104         fi
 105 }
 106
 107 # Setup Network Address Translation (NAT)
 108 setup_nat()
 109 {
 110         local src via dst
 111
 112         if [ -r /etc/sysconfig/static-nat ]; then
 113                 if [ "$1" = "on" ]; then
 114                         grep "^[0-9]" /etc/sysconfig/static-nat | while read src via dst; do
 115                                 /sbin/ip route add nat $dst via $src
 116                                 /sbin/ip rule add from $src nat $dst
 117                         done
 118                 elif [ "$1" = "off" ]; then
 119                         LC_ALL=C /sbin/ip route show table all | grep -E "^nat[[:blank:]]" | while read nat dst via src args; do
 120                                 /sbin/ip rule del from $src nat $dst
 121                                 /sbin/ip route del nat $dst via $src
 122                         done
 123                 fi
 124         fi
 125 }
 126
 127 # Setup static ARP
 128 static_arp()
 129 {
 130         local rc arpdev host hwaddr flags neflags
 131
 132         if is_yes "$STATIC_ARP" && [ -r /etc/ethers ]; then
 133                 if [ -x /sbin/arp ]; then
 134                         run_cmd "Setting static ARP entries" /sbin/arp -f /etc/ethers
 135                 else
 136                         show "Setting static ARP entries"; busy
 137                         rc=0
 138                         arpdev=$(ip link show | awk -F':' '(/UP/) && ! (/NOARP/) && ! (/lo:/) && ! (/NONE:/) { print $2; exit }')
 139                         if [ -z "$arpdev" ]; then
 140                                 rc=1
 141                         else
 142                                 # ip supports only ip addresses
 143                                 grep "^[0-9]" /etc/ethers | \
 144                                 while read host hwaddr flags; do
 145                                         case "$flags" in
 146                                           *temp*)
 147                                                 neflags="nud stale"
 148                                                 ;;
 149                                           *)
 150                                                 neflags="nud permanent"
 151                                                 ;;
 152                                         esac
 153                                         if ! /sbin/ip neigh add $host lladdr $hwaddr $neflags dev $arpdev; then
 154                                                 rc=1
 155                                         fi
 156                                 done
 157                         fi
 158                         if [ "$rc" -gt 0 ]; then
 159                                 fail
 160                         fi
 161                 fi
 162         fi
 163 }
 164
 165 static_rarp()
 166 {
 167         if is_yes "$STATIC_RARP"; then
 168                 if [ ! -e /proc/net/rarp ]; then
 169                         _modprobe single rarp
 170                 fi
 171                 if [ -r /etc/ethers -a -x /sbin/rarp ]; then
 172                         run_cmd "Setting static RARP entries" /sbin/rarp -f /etc/ethers
 173                 fi
 174         fi
 175 }
 176
 177 # Set up all IP && IP parameter variables
 178 setup_ip_param ()
 179 {
 180         # detect network device type (ie. dummy, eth for dummy0, eth0 ..)
 181         if [ -z "$DEVICETYPE" ]; then
 182                 DEVICETYPE=$(echo $DEVICE | awk ' { gsub(/[\.:]?[0-9]*[\.:]?[0-9]*$/,NUL); print $0 } ')
 183         fi
 184
 185         # Setup DEVICETYPE for special cases.
 186         if echo ${DEVICE} | LC_ALL=C grep -qE '^[a-z0-9]+\.[0-9]+$'; then
 187                 DEVICETYPE=vlan
 188         fi
 189
 190         # real name of device (ie. is eth0 for eth0,eth0:1,eth0:alias)
 191         SUBDEVICE=$(echo "$DEVICE" | grep -E "([0-9]+:[0-9]+)")
 192         DEVICE=$(echo $DEVICE | awk ' { gsub(/:.*$/,NUL); print $0 } ')
 193
 194         eval IP4ADDR="\$IPADDR${IP4_PRIM_IF:-}"
 195         # check if ipaddr doesn't contain network length -- use $NETMASK then
 196         if [[ "$IP4ADDR" != */* ]] && [ "$NETMASK" ]; then
 197                 IP4ADDR=$IP4ADDR/$(calcprefix $NETMASK)
 198         fi
 199
 200         # check if we have ipv6 or ipv4 address
 201         if [[ "${IP4ADDR}" = *:* ]]; then
 202                 IP6ADDR=${IP4ADDR}
 203                 IP4ADDR=""
 204         else
 205                 eval IP4ADDROPT="\$IP_AOPTS${IP4_PRIM_IF:-}"
 206                 eval IP4ROUTEOPT="\$IP_ROPTS${IP4_PRIM_IF:-}"
 207         fi
 208         if [ "${IP6_PRIM_IF}" ] ; then
 209                 eval IP6ADDR="\$IPADDR${IP6_PRIM_IF:-}"
 210                 eval IP6ADDROPT="\$IPV6_AOPTS${IP6_PRIM_IF:-}"
 211                 eval IP6ADDRLABEL="\$IP_LABEL${IP6_PRIM_IF:-}"
 212         fi
 213         if [ "${IP4_SRC_IF}" ] ; then
 214                 eval IP4SRCADDR="\$IPADDR${IP4_SRC_IF}"
 215                 IP4SRCADDR=$(echo ${IP4SRCADDR} | awk ' { gsub(/\/.*/,NIL); print "src " $0; } ')
 216         fi
 217
 218         # new rc-scripts 0.4.x option
 219         if [ -z "$HANDLING" ]; then
 220                 HANDLING=0
 221         fi
 222
 223         # set handling for bridge
 224         case "$DEVICETYPE" in
 225           br|atm|lec|irda|vlan)
 226                 HANDLING=1
 227                 ;;
 228         esac
 229
 230         # Multicast ready devices
 231         if is_yes "$MULTICAST"; then
 232                 MULTICAST="on"
 233         else
 234                 case "$DEVICETYPE" in
 235                   eth|br)
 236                         MULTICAST="on"
 237                         ;;
 238                   *)
 239                         MULTICAST="off"
 240                         ;;
 241                 esac
 242         fi
 243
 244         # ARP ready devices
 245         if [ "$ARP" ] ; then
 246                 if is_yes "$ARP"; then
 247                         ARP="arp on"
 248                 else
 249                         ARP="arp off"
 250                 fi
 251         fi
 252 }
 253
 254 check_device_down ()
 255 {
 256         if LC_ALL=C ip link show dev ${DEVICE} 2> /dev/null | grep -q UP; then
 257                 return 1
 258         else
 259                 return 0
 260         fi
 261 }
 262
 263 setup_ip_gw_ro ()
 264 {
 265         # IPv4 gateway
 266         if is_yes "$IPV4_NETWORKING"; then
 267                 if [ -z "${GATEWAYDEV}" -o "${GATEWAYDEV}" = "${DEVICE}" ]; then
 268                         # set up default gateway
 269                         if [ "${GATEWAY}" ]; then
 270                                 ip -4 route add default via ${GATEWAY} dev ${DEVICE} ${IP4SRCADDR} onlink 2>/dev/null
 271                                 if [ $? = 0 ]; then
 272                                         DEFGW=${GATEWAY}
 273                                 else
 274                                         # The default gateway could be set via eth0, while bringing up eth1 we shouldn't set default gateway again.
 275                                         # To prevent this message just set GATEWAYDEV=eth0 in /etc/sysconfig/network.
 276                                         nls "Warning: Default gateway already set proably via other interface. Do you need to setup GATEWAYDEV?"
 277                                 fi
 278                         elif [ "${GATEWAYDEV}" = "${DEVICE}" ]; then
 279                                 ip -4 route add default dev ${DEVICE} ${IP4SRCADDR}
 280                         fi
 281                 fi
 282         fi
 283
 284         # IPv6 gateway && IPv6 globalroute
 285         if is_yes "$IPV6_NETWORKING"; then
 286                 if [ -z "${GATEWAY6DEV}" -o "${GATEWAY6DEV}" = "${DEVICE}" ]; then
 287                         # set up default gateway
 288                         if [ "${GATEWAY6}" ]; then
 289                                 ip -6 route add default via ${GATEWAY6} dev ${DEVICE} ${IP6SRCADDR} onlink
 290                                 DEFGW6=${GATEWAY6}
 291                         elif [ "${GATEWAY6DEV}" = "${DEVICE}" ]; then
 292                                 ip -6 route add default dev ${DEVICE} ${IP6SRCADDR}
 293                         fi
 294                 fi
 295                 if [ -z "${IPV6_GLOBALROUTEDEV}" -o "${IPV6_GLOBALROUTEDEV}" = "${DEVICE}" ]; then
 296                         # set up default route
 297                         if [ "${IPV6_GLOBALROUTEGW}" ]; then
 298                                 ip -6 route add 2000::/3 via ${IPV6_GLOBALROUTEGW} dev ${DEVICE} ${IP6SRCADDR} onlink
 299                         elif [ "${IPV6_GLOBALROUTEDEV}" = "${DEVICE}" ]; then
 300                                 ip -6 route add 2000::/3 dev ${DEVICE} ${IP6SRCADDR}
 301                         fi
 302                 fi
 303         fi
 304 }
 305
 306 #
 307 # following function sets up routes not associated to any device
 308 # eg. unreachable or blackhole routes
 309 # (c) 1999 Jacek Konieczny <jajcus@pld-linux.org>
 310 #
 311 setup_routes()
 312 {
 313         local args
 314
 315         if [ -f /etc/sysconfig/static-routes ]; then
 316                 if [ "$1" = "on" -o "$1" = "yes" ] ; then
 317                         grep -E "^(none|any)[[:blank:]]" /etc/sysconfig/static-routes | while read device args; do
 318                                 /sbin/ip route add $args
 319                         done
 320                 else
 321                         grep -E "^(none|any)[[:blank:]]" /etc/sysconfig/static-routes | while read device args; do
 322                                 /sbin/ip route del $args 2>/dev/null
 323                         done
 324                 fi
 325         fi
 326 }
 327
 328 # Add ONLY IPv4 address (IPv6 address is added automaticly)
 329 set_up_loopback()
 330 {
 331         if is_yes "$IPV4_NETWORKING"; then
 332                 ip addr add 127.0.0.1/8 dev lo
 333         fi
 334         ip link set dev lo up
 335 }
 336
 337 set_down_loopback()
 338 {
 339         LC_ALL=C ip addr flush dev lo 2>&1 | grep -v "Nothing to flush"
 340         ip link set dev lo down
 341 }
 342
 343 modprobe_net()
 344 {
 345         if is_yes "$IPV6_NETWORKING" && is_module "ipv6"; then
 346                 _modprobe single ipv6
 347         fi
 348
 349         if is_yes "$IPX" && is_module "ipx"; then
 350                 _modprobe single ipx
 351         fi
 352 }
 353
 354 # calculate network prefix from given network mask
 355 calcprefix()
 356 {
 357         local old_IFS netmask prefix endp
 358
 359         old_IFS=$IFS
 360         IFS='.'
 361         netmask=$(echo $1)
 362         IFS=$old_IFS
 363
 364         prefix=0
 365         endp=0
 366         for n in $netmask ; do
 367                 for i in 128 64 32 16 8 4 2 1 ; do
 368                         if [ $(($n & $i)) -ne 0 ]; then
 369                                 if [ $endp -eq 0 ]; then
 370                                         prefix=$(($prefix + 1))
 371                                 else
 372                                         echo "32"
 373                                         return
 374                                 fi
 375                         else
 376                                 endp=1
 377                         fi
 378                 done
 379         done
 380         echo $prefix
 381 }
 382
 383 # calculate network mask from given prefix
 384 # (c) 1999 Grzegorz Stanislawski <stangrze@open.net.pl>
 385 calcnetmask()
 386 {
 387         local prefix a MASK
 388
 389         MASK=""
 390         if [ "${1##[0-9]*}" ]; then
 391                 prefix=32
 392         else
 393                 prefix=$1
 394         fi
 395         for i in 1 2 3 4; do
 396                 case $prefix in
 397                   7)    a=254 ;;
 398                   6)    a=252 ;;
 399                   5)    a=248 ;;
 400                   4)    a=240 ;;
 401                   3)    a=224 ;;
 402                   2)    a=192 ;;
 403                   1)    a=128 ;;
 404                   *)
 405                         [ $prefix -ge 8 ] && a=255
 406                         [ $prefix -le 0 ] && a=0
 407                         ;;
 408                 esac
 409
 410                 prefix="$(( $prefix - 8))"
 411                 if [ -z "$MASK" ]; then
 412                         MASK=$a
 413                 else
 414                         MASK=$MASK.$a
 415                 fi
 416         done
 417
 418         echo $MASK
 419         return
 420 }
 421
 422 # Retrievies PPPD PID and real interface name from /var/run/ppp-*.pid
 423 get_ppp_device_and_pid ()
 424 {
 425         if [ -f "/var/run/ppp-$DEVNAME.pid" ] ; then
 426                 eval $(
 427                 {
 428                         read PID ; echo "PID='$PID'"
 429                         read REALDEVICE ; echo "REALDEVICE=$REALDEVICE"
 430                 } < "/var/run/ppp-$DEVNAME.pid")
 431         fi
 432
 433         if [ -z "$REALDEVICE" ] ; then
 434                 REALDEVICE=$DEVICE
 435         fi
 436 }
 437
 438 # following function setups advanced routing rules
 439 # Olgierd Pieczul <wojrus@pld-linux.org>
 440 setup_ip_rules ()
 441 {
 442         local args prio from src
 443
 444         if [ -f /etc/sysconfig/static-routes ] ; then
 445                 if is_yes "$1"; then
 446                         grep -E "^(from|to|iif|tos|fwmark|dev|pref|priority|prio)[[:blank:]]" /etc/sysconfig/static-routes | while read args; do
 447                                 /sbin/ip rule add $args
 448                         done
 449                 elif is_no "$1"; then
 450                         LC_ALL=C /sbin/ip rule show | grep -vE -e "from all lookup (main|default|local) \$" -e " map-to " | while read prio from src args; do
 451                                 [ "$src" = "all" ] && ip rule delete $args || ip rule delete $from $src $args
 452                         done
 453                 fi
 454         fi
 455 }
 456
 457 is_wireless_device ()
 458 {
 459         if [ -x /sbin/iwconfig ]; then
 460                 LC_ALL=C iwconfig "${1}" 2>&1 | grep -q "no wireless extensions" || return 0
 461         fi
 462         return 1
 463 }
 464
 465 wireless_param()
 466 {
 467         device="$1"
 468         if [ "$2" = "br" ]; then
 469                 prefix="${device}_"
 470         else
 471                 prefix=""
 472         fi
 473
 474         local val wlan_mode
 475
 476         # wlan mode needs to be first
 477         wlan_mode="$(eval echo \$${prefix}WLAN_MODE)" && [ "$wlan_mode" ] && \
 478                 iwconfig ${device} mode "$wlan_mode"
 479
 480         val="$(eval echo \$${prefix}WLAN_NICKNAME)" && [ "$val" ] && \
 481                 iwconfig ${device} nick "$val"
 482
 483         val="$(eval echo \$${prefix}WLAN_NWID)" && [ "$val" ] && \
 484                 iwconfig ${device} nwid "$val"
 485
 486         if [ "$wlan_mode" != "Managed" -a "$wlan_mode" != "managed" ]; then
 487                 if val="$(eval echo \$${prefix}WLAN_FREQ)" && [ "$val" ]; then
 488                         iwconfig ${device} freq "$val"
 489                 elif val="$(eval echo \$${prefix}WLAN_CHANNEL)" && [ "$val" ]; then
 490                         iwconfig ${device} channel "$val"
 491                 fi
 492         fi
 493
 494         val="$(eval echo \$${prefix}WLAN_SENS)" && [ "$val" ] && \
 495                 iwconfig ${device} sens "$val"
 496         val="$(eval echo \$${prefix}WLAN_AP)" && [ "$val" ] && \
 497                 iwconfig ${device} ap "$val"
 498         val="$(eval echo \$${prefix}WLAN_BITRATE)" && [ "$val" ] && \
 499                 iwconfig ${device} rate "$val"
 500         val="$(eval echo \$${prefix}WLAN_RTS_THRESHOLD)" && [ "$val" ] && \
 501                 iwconfig ${device} rts "$val"
 502         val="$(eval echo \$${prefix}WLAN_FRAGMENTATION_THRESHOLD)" && [ "$val" ] && \
 503                 iwconfig ${device} frag "$val"
 504
 505         local wlan_encryption="$(eval echo \$${prefix}WLAN_ENCRYPTION)"
 506         local wlan_key="$(eval echo \$${prefix}WLAN_KEY)"
 507         # TODO: well, actually shouldn't set WLAN_KEY if other keys than current are set
 508         if [ "$wlan_key" ]; then
 509                 # wlan key can contain index of key to set
 510                 # to set other than current keys suffix with 1-4:
 511                 local idx
 512                 for idx in 1 2 3 4; do
 513                         val="$(eval echo \$${prefix}WLAN_KEY_$idx)"
 514                         [ "$val" ] || continue
 515                         iwconfig ${device} key "[$idx]" "$val"
 516                 done
 517                 if val="$(eval echo \$${prefix}WLAN_KEY_CURRENT)" && [ "$val" ]; then
 518                         iwconfig ${device} key "[$val]"
 519                 else
 520                         iwconfig ${device} key "$wlan_key"
 521                 fi
 522
 523                 [ "$wlan_encryption" ] && iwconfig ${device} key "$wlan_encryption"
 524         fi
 525
 526         if is_no "$wlan_encryption"; then
 527                 iwconfig ${device} key off
 528         fi
 529         val="$(eval echo \$${prefix}WLAN_POWER)" && [ "$val" ] && \
 530                 iwconfig ${device} power "$val"
 531         val="$(eval echo \$${prefix}WLAN_TXPOWER)" && [ "$val" ] && \
 532                 iwconfig ${device} txpower "$val"
 533         val="$(eval echo \$${prefix}WLAN_RETRY)" && [ "$val" ] && \
 534                 iwconfig ${device} retry "$val"
 535         val="$(eval echo \$${prefix}WLAN_NWID)" && [ "$val" ] && \
 536                 iwconfig ${device} nwid "$val"
 537
 538         # essid should be last due to network rescanning by wlan devices
 539         val="$(eval echo \$${prefix}WLAN_ESSID)" && [ "$val" ] && \
 540                 iwconfig ${device} essid "$val"
 541
 542         if is_yes "$(eval echo \$${prefix}WLAN_COMMIT)"; then
 543                 iwconfig ${device} commit
 544         fi
 545 }
 546
 547 # returns
 548 # 0 - no link
 549 # 1 - link ok
 550 # 2 - unsupported, unknown return
 551 check_mii_tool ()
 552 {
 553         [ -x /sbin/mii-tool ] || return 2
 554         local output=$(LC_ALL=C mii-tool $1 2>&1)
 555         echo $output | grep -q "link ok" && return 1
 556         echo $output | grep -q "no link" && return 0
 557         return 2
 558 }
 559
 560 # returns
 561 # 0 - link off
 562 # 1 - link on
 563 # 2 - unsupported, unknown return
 564 check_ethtool ()
 565 {
 566         [ -x /sbin/ethtool ] || return 2
 567         local output=$(LC_ALL=C ethtool $1 2>&1)
 568         echo $output | grep -q "Link detected: yes" && return 1
 569         echo $output | grep -q "Link detected: no" && return 0
 570         return 2
 571 }
 572
 573 # returns
 574 # 0 - radio off
 575 # 1 - radio on
 576 # 2 - unsupported
 577 check_iwconfig ()
 578 {
 579         local output
 580         [ -x /sbin/iwconfig ] || return 2
 581         output=$(LC_ALL=C iwconfig "$1" 2>&1)
 582         # "radio off" is ipwxxx only "feature" (and there is no "radio on")
 583         echo "$output" | grep -q "radio off" && return 0
 584         # rfkill state (are there devices with multiple rfkill buttons?)
 585         output=$(cat /sys/class/net/${1}/device/rfkill*/state 2> /dev/null)
 586         # 1 is rfkill not active
 587         [ "$output" = "1" ] && return 1
 588         [ "$output" = "0" -o "$output" = "2" ] && return 0
 589         # XXX: need more generic checks for wifi
 590         return 2
 591 }
 592
 593 # returns
 594 # 0 - link down
 595 # 1 - link up
 596 check_link_down ()
 597 {
 598         if [ -x /sbin/mii-tool -o -x /sbin/ethtool -o -x /sbin/iwconfig ]; then
 599                 if ! LC_ALL=C ip link show dev $1 2>/dev/null| grep -q UP ; then
 600                         ip link set dev $1 up >/dev/null 2>&1
 601                         timeout=0
 602                         while [ $timeout -le 6 ]; do
 603                                 check_mii_tool $1
 604                                 m=$?
 605                                 check_ethtool $1
 606                                 e=$?
 607                                 check_iwconfig $1
 608                                 i=$?
 609                                 # trust ethtool and iwconfig
 610                                 if [ $i -eq 1 ] || [ $e -eq 1 ] ; then
 611                                         return 1
 612                                 fi
 613                                 # use mii check only if all other check are unsupported
 614                                 # (mii check lies too often)
 615                                 if [ $m -eq 1 ] && [ $i -eq 2 ] && [ $e -eq 2 ]; then
 616                                         return 1
 617                                 fi
 618                                 usleep 500000
 619                                 timeout=$((timeout+1))
 620                         done
 621                         return 0
 622                 fi
 623         fi
 624         return 1
 625 }