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         DEVNAME=${CONFIG##*/ifcfg-}
  11
  12         if [[ "$CONFIG" = /* ]]; then
  13                 if [ -f "$CONFIG" ] ; then
  14                         . "$CONFIG"
  15                 fi
  16         elif [ -f "/etc/sysconfig/interfaces/$CONFIG" ] ; then
  17                 . "/etc/sysconfig/interfaces/$CONFIG"
  18         fi
  19
  20         # This is sanity check so that if you've copied ifcfg-eth0 to ifcfg-eth1
  21         # and forgot to alter DEVICE= line you won't accidentally bring down eth0
  22         # while executing ifdown eth1.
  23         if [ -n "$DEVICE" -a  "$DEVNAME" != "$DEVICE" ]; then
  24                 echo >&2 "$0: DEVICE specified in $CONFIG does not match filename. Aborting!"
  25                 exit 1
  26         fi
  27
  28         if [ -n "${PREFIX}" ] && [[ "$IPADDR" != */* ]]; then
  29                 IPADDR="$IPADDR/$PREFIX"
  30         fi
  31 }
  32
  33 do_netreport ()
  34 {
  35         # Notify programs that have requested notification
  36         ( cd /var/run/netreport || exit
  37         for i in * ; do
  38                 [ -f $i ] && kill -SIGIO $i >/dev/null 2>&1 || \
  39                         rm -f $i >/dev/null 2>&1
  40         done
  41         )
  42 }
  43
  44 need_hostname()
  45 {
  46         local hostname=$(hostname)
  47         if [ "$hostname" = "(none)" -o "$hostname" = "localhost" -o \
  48              "$hostname" = "localhost.localdomain" ]; then
  49                 NEEDHOSTNAME=yes
  50         else
  51                 unset NEEDHOSTNAME
  52         fi
  53 }
  54
  55 set_hostname()
  56 {
  57         typeset hostname domain
  58
  59         hostname=$(echo $1 | awk ' { gsub(/\..*$/,NIL); print $0; } ')
  60         domain=$(echo $1 | awk ' { sub(/^[^\.]*\./,NIL); print $0; } ')
  61
  62         if [ -n "$hostname" ] ; then
  63                 echo "$hostname" > /etc/HOSTNAME
  64                 hostname $hostname
  65         fi
  66
  67         if [ -n "$domain" ] ; then
  68                 >/etc/resolv.conf.new
  69                 if ! grep -q "search $domain" /etc/resolv.conf ; then
  70                         echo "search $domain" >> /etc/resolv.conf.new
  71                 fi
  72                 echo "domain $domain" >> /etc/resolv.conf.new
  73                 grep -v "^domain " /etc/resolv.conf >> /etc/resolv.conf.new
  74                 mv -f /etc/resolv.conf.new /etc/resolv.conf
  75         fi
  76 }
  77
  78 # Setup Network Address Translation (NAT)
  79 setup_nat()
  80 {
  81         typeset src via dst
  82
  83         if [ -r /etc/sysconfig/static-nat ]; then
  84                 if [ "$1" = "on" ]; then
  85                         grep "^[0-9]" /etc/sysconfig/static-nat | while read src via dst; do
  86                                 /sbin/ip route add nat $dst via $src
  87                                 /sbin/ip rule add from $src nat $dst
  88                         done
  89                 elif [ "$1" = "off" ]; then
  90                         /sbin/ip route show table all | egrep "^nat[[:blank:]]" | while read nat dst via src args; do
  91                                 /sbin/ip rule del from $src nat $dst
  92                                 /sbin/ip route del nat $dst via $src
  93                         done
  94                 fi
  95         fi
  96 }
  97
  98 # Setup static ARP
  99 static_arp()
 100 {
 101         typeset rc arpdev host hwaddr flags neflags
 102
 103         if is_yes "$STATIC_ARP" && [ -r /etc/ethers ]; then
 104                 if [ -x /sbin/arp ]; then
 105                         run_cmd "Setting static ARP entries" /sbin/arp -f /etc/ethers
 106                 else
 107                         show "Setting static ARP entries"; busy
 108                         rc=0
 109                         arpdev=$(ip link show | awk -F':' '(/UP/) && ! (/NOARP/) && ! (/lo:/) && ! (/NONE:/) { print $2; exit }')
 110                         if [ -z "$arpdev" ]; then
 111                                 rc=1
 112                         else
 113                                 # ip supports only ip addresses
 114                                 grep "^[0-9]" /etc/ethers | \
 115                                 while read host hwaddr flags; do
 116                                         case "$flags" in
 117                                           *temp*)
 118                                                 neflags="nud stale"
 119                                                 ;;
 120                                           *)
 121                                                 neflags="nud permanent"
 122                                                 ;;
 123                                         esac
 124                                         if ! /sbin/ip neigh add $host lladdr $hwaddr $neflags dev $arpdev; then
 125                                                 rc=1
 126                                         fi
 127                                 done
 128                         fi
 129                         if [ "$rc" -gt 0 ]; then
 130                                 fail
 131                         fi
 132                 fi
 133         fi
 134 }
 135
 136 static_rarp()
 137 {
 138         if is_yes "$STATIC_RARP"; then
 139                 if [ ! -e /proc/net/rarp ]; then
 140                         _modprobe single -k rarp
 141                 fi
 142                 if [ -r /etc/ethers -a -x /sbin/rarp ]; then
 143                         run_cmd "Setting static RARP entries" /sbin/rarp -f /etc/ethers
 144                 fi
 145         fi
 146 }
 147
 148 vlan_setup()
 149 {
 150         if [ -x /sbin/vconfig -a -e /proc/net/vlan/config ] && `echo $DEVICE | grep -q ^eth`; then
 151                 /sbin/vconfig set_name_type DEV_PLUS_VID_NO_PAD 2>&1 > /dev/null
 152                 ETH_VLANS="yes"
 153         else
 154                 ETH_VLANS="no"
 155         fi
 156 }
 157
 158 # Set up all IP && IP parameter variables
 159 setup_ip_param ()
 160 {
 161         # detect network device type (ie. dummy, eth for dummy0, eth0 ..)
 162         if [ -z "$DEVICETYPE" ]; then
 163                 DEVICETYPE=$(echo $DEVICE | awk ' { gsub(/[0-9]*\.?[0-9]*$/,NUL); print $0 } ')
 164         fi
 165
 166         # Setup DEVICETYPE for special cases.
 167         if (echo ${DEVICE} | LC_ALL=C egrep -q '^[a-z0-9]+\.[0-9]+$'); then
 168                 DEVICETYPE=vlan
 169         fi
 170
 171         # real name of device (ie. is eth0 for eth0,eth0:1,eth0:alias)
 172         DEVICE=$(echo $DEVICE | awk ' { gsub(/:.*$/,NUL); print $0 } ')
 173
 174         eval IP4ADDR="\$IPADDR${IP4_PRIM_IF:-}"
 175         if echo "${IP4ADDR}" | grep -q ":" ; then
 176                 IP6ADDR=${IP4ADDR}
 177                 IP4ADDR=""
 178         else
 179                 eval IP4ADDROPT="\$IP_AOPTS${IP4_PRIM_IF:-}"
 180                 eval IP4ROUTEOPT="\$IP_ROPTS${IP4_PRIM_IF:-}"
 181         fi
 182         if [ -n "${IP6_PRIM_IF}" ] ; then
 183                 eval IP6ADDR="\$IPADDR${IP6_PRIM_IF:-}"
 184                 eval IP6ADDROPT="\$IPV6_AOPTS${IP6_PRIM_IF:-}"
 185         fi
 186         if [ -n "${IP4_SRC_IF}" ] ; then
 187                 eval IP4SRCADDR="\$IPADDR${IP4_SRC_IF}"
 188                 IP4SRCADDR=$(echo ${IP4SRCADDR} | awk ' { gsub(/\/.*/,NIL); print "src " $0; } ')
 189         fi
 190         if [ -n "${IP6_SRC_IF}" ] ; then
 191                 eval IP6SRCADDR="\$IPADDR${IP6_SRC_IF}"
 192                 IP6SRCADDR=$(echo ${IP6SRCADDR} | awk ' { gsub(/\/.*/,NIL); print "src " $0; } ')
 193         fi
 194
 195         # new rc-scripts 0.4.x option
 196         if [ -z "$HANDLING" ]; then
 197                 HANDLING=0
 198         fi
 199
 200         # set handling for bridge
 201         case "$DEVICETYPE" in
 202           br|atm|lec|irda|vlan)
 203                 HANDLING=1
 204                 ;;
 205         esac
 206
 207         # Multicast ready devices
 208         if is_yes "$MULTICAST"; then
 209                 MULTICAST="on"
 210         else
 211                 case "$DEVICETYPE" in
 212                   eth|br)
 213                         MULTICAST="on"
 214                         ;;
 215                   *)
 216                         MULTICAST="off"
 217                         ;;
 218                 esac
 219         fi
 220
 221         # ARP ready devices
 222         if [ -n "$ARP" ] ; then
 223                 if is_yes "$ARP"; then
 224                         ARP="arp on"
 225                 else
 226                         ARP="arp off"
 227                 fi
 228         fi
 229 }
 230
 231 check_device_down ()
 232 {
 233         if (ip link show dev ${DEVICE} 2> /dev/null | grep -q UP); then
 234                 return 1
 235         else
 236                 return 0
 237         fi
 238 }
 239
 240 setup_ip_gw_ro ()
 241 {
 242         # IPv4 gateway
 243         if is_yes "$IPV4_NETWORKING"; then
 244                 if [ -z "${GATEWAYDEV}" -o "${GATEWAYDEV}" = "${DEVICE}" ]; then
 245                         # set up default gateway
 246                         if [ -n "${GATEWAY}" ]; then
 247                                 ip -4 route add default via ${GATEWAY} dev ${DEVICE} ${IP4SRCADDR} onlink 2>/dev/null
 248                                 if [ $? = 0 ]; then
 249                                         DEFGW=${GATEWAY}
 250                                 else
 251                                         # The default gateway could be set via eth0, while bringing up eth1 we shouldn't set default gateway again.
 252                                         # To prevent this message just set GATEWAYDEV=eth0 in /etc/sysconfig/network.
 253                                         nls "Warning: Default gateway already set proably via other interface. Do you need to setup GATEWAYDEV?"
 254                                 fi
 255                         elif [ "${GATEWAYDEV}" = "${DEVICE}" ]; then
 256                                 ip -4 route add default dev ${DEVICE} ${IP4SRCADDR}
 257                         fi
 258                 fi
 259         fi
 260
 261         # IPv6 gateway && IPv6 globalroute
 262         if is_yes "$IPV6_NETWORKING"; then
 263                 if [ -z "${GATEWAY6DEV}" -o "${GATEWAY6DEV}" = "${DEVICE}" ]; then
 264                         # set up default gateway
 265                         if [ -n "${GATEWAY6}" ]; then
 266                                 ip -6 route add default via ${GATEWAY6} dev ${DEVICE} ${IP6SRCADDR} onlink
 267                                 DEFGW6=${GATEWAY6}
 268                         elif [ "${GATEWAY6DEV}" = "${DEVICE}" ]; then
 269                                 ip -6 route add default dev ${DEVICE} ${IP6SRCADDR}
 270                         fi
 271                 fi
 272                 if [ -z "${IPV6_GLOBALROUTEDEV}" -o "${IPV6_GLOBALROUTEDEV}" = "${DEVICE}" ]; then
 273                         # set up default route
 274                         if [ -n "${IPV6_GLOBALROUTEGW}" ]; then
 275                                 ip -6 route add 2000::/3 via ${IPV6_GLOBALROUTEGW} dev ${DEVICE} ${IP6SRCADDR} onlink
 276                         elif [ "${IPV6_GLOBALROUTEDEV}" = "${DEVICE}" ]; then
 277                                 ip -6 route add 2000::/3 dev ${DEVICE} ${IP6SRCADDR}
 278                         fi
 279                 fi
 280         fi
 281 }
 282
 283 #
 284 # following function sets up routes not associated to any device
 285 # eg. unreachable or blackhole routes
 286 # (c) 1999 Jacek Konieczny <jajcus@pld-linux.org>
 287 #
 288 setup_routes()
 289 {
 290         typeset args
 291
 292         if [ -f /etc/sysconfig/static-routes ]; then
 293                 if [ "$1" = "on" -o "$1" = "yes" ] ; then
 294                         egrep "^(none|any)[[:blank:]]" /etc/sysconfig/static-routes | while read device args; do
 295                                 /sbin/ip route add $args
 296                         done
 297                 else
 298                         egrep "^(none|any)[[:blank:]]" /etc/sysconfig/static-routes | while read device args; do
 299                                 /sbin/ip route del $args 2>/dev/null
 300                         done
 301                 fi
 302         fi
 303 }
 304
 305 # Add ONLY IPv4 address (IPv6 address is added automaticly)
 306 set_up_loopback()
 307 {
 308         if is_yes "$IPV4_NETWORKING"; then
 309                 ip addr add 127.0.0.1/8 dev lo
 310         fi
 311         ip link set dev lo up
 312 }
 313
 314 set_down_loopback()
 315 {
 316         ip addr flush dev lo 2>&1 | grep -v "Nothing to flush"
 317         ip link set dev lo down
 318 }
 319
 320 modprobe_net()
 321 {
 322         if is_yes "$IPV6_NETWORKING" && is_module "ipv6"; then
 323                 _modprobe single -k ipv6
 324         fi
 325
 326         if is_yes "$IPX" && is_module "ipx"; then
 327                 _modprobe single -k ipx
 328         fi
 329 }
 330
 331 #
 332 # folowing function calculates network prefix from given network mask
 333 # (c) 1999 Grzegorz Stanislawski <stangrze@open.net.pl>
 334 #
 335 calcprefix()
 336 {
 337         typeset len olen bad prefix
 338
 339         prefix=0
 340         olen=8
 341         bad=0
 342         for i in 1 2 3 4; do
 343                 len=0
 344                 j=$(echo "$1" | awk -F"." "{ print \$${i} }")
 345                 case "$j" in
 346                   255)  len=8 ;;
 347                   254)  len=7 ;;
 348                   252)  len=6 ;;
 349                   248)  len=5 ;;
 350                   240)  len=4 ;;
 351                   224)  len=3 ;;
 352                   192)  len=2 ;;
 353                   128)  len=1 ;;
 354                   0)    len=0 ;;
 355                   *)    len=300 ;;
 356                 esac
 357                 [ "$len" -gt "$olen" ] && bad=1
 358                 prefix=$(($prefix + $len))
 359                 olen=$len
 360         done
 361
 362         if [ "$bad" = "0" ]; then
 363                 echo "$prefix"
 364         else
 365                 echo "32"
 366         fi
 367         return
 368 }
 369
 370 #
 371 # folowing function calculates network mask from given prefix
 372 # (c) 1999 Grzegorz Stanislawski <stangrze@open.net.pl>
 373 #
 374 calcnetmask()
 375 {
 376         typeset prefix a MASK
 377
 378         MASK=""
 379         if [ "`echo "${1}" | grep "^[0-9]"`" = "" ]; then
 380                 prefix=32
 381         else
 382                 typeset -i prefix=$1
 383         fi
 384         for i in 1 2 3 4; do
 385                 case $prefix in
 386                   7)    a=254 ;;
 387                   6)    a=252 ;;
 388                   5)    a=248 ;;
 389                   4)    a=240 ;;
 390                   3)    a=224 ;;
 391                   2)    a=192 ;;
 392                   1)    a=128 ;;
 393                   *)
 394                         [ $prefix -ge 8 ] && a=255
 395                         [ $prefix -le 0 ] && a=0
 396                         ;;
 397                 esac
 398
 399                 prefix="$(( $prefix - 8))"
 400                 if [ -z "$MASK" ]; then
 401                         MASK=$a
 402                 else
 403                         MASK=$MASK.$a
 404                 fi
 405         done
 406
 407         echo $MASK
 408         return
 409 }
 410
 411 # Retrievies PPPD PID and real interface name from /var/run/ppp-*.pid
 412 get_ppp_device_and_pid ()
 413 {
 414         if [ -f "/var/run/ppp-$DEVNAME.pid" ] ; then
 415                 eval `{
 416                         read PID ; echo "PID='$PID'"
 417                         read REALDEVICE ; echo "REALDEVICE=$REALDEVICE"
 418                 } < "/var/run/ppp-$DEVNAME.pid"`
 419         fi
 420
 421         if [ -z "$REALDEVICE" ] ; then
 422                 REALDEVICE=$DEVICE
 423         fi
 424 }
 425
 426 # following function setups advanced routing rules
 427 # Olgierd Pieczul <wojrus@pld-linux.org>
 428 setup_ip_rules ()
 429 {
 430         typeset args prio from src
 431
 432         if [ -f /etc/sysconfig/static-routes ] ; then
 433                 if is_yes "$1"; then
 434                         egrep "^(from|to|iif|tos|fwmark|dev|pref|priority|prio)[[:blank:]]" /etc/sysconfig/static-routes | while read args; do
 435                                 /sbin/ip rule add $args
 436                         done
 437                 elif is_no "$1"; then
 438                         /sbin/ip rule show | egrep -v -e "from all lookup (main|default|local) \$" -e " map-to " | while read prio from src args; do
 439                                 [ "$src" == "all" ] && ip rule delete $args || ip rule delete $from $src $args
 440                         done
 441                 fi
 442         fi
 443 }
 444
 445 is_wireless_device ()
 446 {
 447         if [ -x /sbin/iwconfig ]; then
 448                 LC_ALL=C iwconfig "${1}" 2>&1 | grep -q "no wireless extensions" || return 0
 449         fi
 450         return 1
 451 }
 452
 453 wireless_param ()
 454 {
 455         device="$1"
 456         if [ "$2" = "br" ]; then
 457                 prefix="${device}_"
 458         else
 459                 prefix=""
 460         fi
 461
 462         if [ -z "$(eval echo \$${prefix}WLAN_NICKNAME)" ]; then
 463                  WLAN_NICKNAME="$(hostname -f 2>/dev/null || hostname 2>/dev/null || echo localhost)"
 464         else
 465                  WLAN_NICKNAME="$(eval echo \$${prefix}WLAN_NICKNAME)"
 466         fi
 467
 468         # wlan mode needs to be first
 469         [ -n "$(eval echo \$${prefix}WLAN_MODE)" ] && \
 470                 iwconfig ${device} mode "$(eval echo \$${prefix}WLAN_MODE)"
 471         iwconfig ${device} nick ${WLAN_NICKNAME}
 472         [ -n "$(eval echo \$${prefix}WLAN_NWID)" ] && \
 473                 iwconfig ${device} nwid "$(eval echo \$${prefix}WLAN_NWID)"
 474         if [ -n "$(eval echo \$${prefix}WLAN_FREQ)" -a "$(eval echo \$${prefix}${WLAN_MODE})" != "Managed" ] ; then
 475                 iwconfig ${device} freq "$(eval echo \$${prefix}WLAN_FREQ)"
 476         elif [ -n "$(eval echo \$${prefix}WLAN_CHANNEL)" -a "$(eval echo \$${prefix}${WLAN_MODE})" != "Managed" ]; then
 477                 iwconfig ${device} channel "$(eval echo \$${prefix}WLAN_CHANNEL)"
 478         fi
 479         [ -n "$(eval echo \$${prefix}WLAN_SENS)" ] && \
 480                 iwconfig ${device} sens "$(eval echo \$${prefix}WLAN_SENS)"
 481         [ -n "$(eval echo \$${prefix}WLAN_AP)" ] && \
 482                 iwconfig ${device} ap "$(eval echo \$${prefix}WLAN_AP)"
 483         [ -n "$(eval echo \$${prefix}WLAN_BITRATE)" ] && \
 484                 iwconfig ${device} rate "$(eval echo \$${prefix}WLAN_BITRATE)"
 485         [ -n "$(eval echo \$${prefix}WLAN_RTS_THRESHOLD)" ] && \
 486                 iwconfig ${device} rts "$(eval echo \$${prefix}WLAN_RTS_THRESHOLD)"
 487         [ -n "$(eval echo \$${prefix}WLAN_FRAGMENTATION_THRESHOLD)" ] && \
 488                 iwconfig ${device} frag "$(eval echo \$${prefix}WLAN_FRAGMENTATION_THRESHOLD)"
 489         if [ -n "$(eval echo \$${prefix}WLAN_KEY)" ]; then
 490                 iwconfig ${device} key "$(eval echo \$${prefix}WLAN_KEY)"
 491                 [ -n "$(eval echo \$${prefix}WLAN_ENCRYPTION)" ] && \
 492                         iwconfig ${device} key "$(eval echo \$${prefix}WLAN_ENCRYPTION)"
 493         fi
 494         if is_no "$(eval echo \$${prefix}WLAN_ENCRYPTION)"; then
 495                 iwconfig ${device} key off
 496         fi
 497         [ -n "$(eval echo \$${prefix}WLAN_POWER)" ] && \
 498                 iwconfig ${device} power "$(eval echo \$${prefix}WLAN_POWER)"
 499         [ -n "$(eval echo \$${prefix}WLAN_TXPOWER)" ] && \
 500                 iwconfig ${device} txpower "$(eval echo \$${prefix}WLAN_TXPOWER)"
 501         [ -n "$(eval echo \$${prefix}WLAN_RETRY)" ] && \
 502                 iwconfig ${device} retry "$(eval echo \$${prefix}WLAN_RETRY)"
 503         [ -n "$(eval echo \$${prefix}WLAN_NWID)" ] && iwconfig ${device} \
 504                 nwid "$(eval echo \$${prefix}WLAN_NWID)"
 505
 506         # essid should be last due to network rescanning by wlan devices
 507         [ -n "$(eval echo \$${prefix}WLAN_ESSID)" ] && iwconfig ${device} \
 508                 essid "$(eval echo \$${prefix}WLAN_ESSID)"
 509
 510         if is_yes "$(eval echo \$${prefix}WLAN_COMMIT)"; then
 511                 iwconfig ${device} commit
 512         fi
 513 }
 514
 515 check_mii_tool ()
 516 {
 517         [ -x /sbin/mii-tool ] || return 2
 518         output=$(LC_ALL=C mii-tool $1 2>&1)
 519         echo $output | LC_ALL=C grep -q "link ok" && return 1
 520         echo $output | LC_ALL=C grep -q "no link" && return 0 || return 2
 521 }
 522
 523 check_ethtool ()
 524 {
 525         [ -x /sbin/ethtool ] || return 2
 526         output=$(LC_ALL=C ethtool $1 2>&1)
 527         echo $output | LC_ALL=C grep -q "Link detected: yes" && return 1
 528         echo $output | LC_ALL=C grep -q "Link detected: no" && return 0 || return 2
 529 }
 530
 531 check_iwconfig ()
 532 {
 533         [ -x /sbin/iwconfig ] || return 2
 534         output=$(LC_ALL=C iwconfig $1 2>&1)
 535         echo $output | LC_ALL=C grep -q "radio off" && return 0 || return 2
 536 }
 537
 538 check_link_down ()
 539 {
 540         if [ -x /sbin/mii-tool -o -x /sbin/ethtool -o -x /sbin/iwconfig ]; then
 541                 if ! LC_ALL=C ip link show dev $1 2>/dev/null| grep -q UP ; then
 542                         ip link set dev $1 up >/dev/null 2>&1
 543                         timeout=0
 544                         while [ $timeout -le 10 ]; do
 545                                 check_mii_tool $1
 546                                 m=$?
 547                                 check_ethtool $1
 548                                 e=$?
 549                                 check_iwconfig $1
 550                                 i=$?
 551                                 if [ $m -eq 1 ] || [ $e -eq 1 ] ; then
 552                                         return 1
 553                                 fi
 554                                 if [ $m -eq 2 ] && [ $e -eq 2 ] && [ $i -eq 2 ]; then
 555                                         return 1
 556                                 fi
 557                                 usleep 500000
 558                                 timeout=$((timeout+1))
 559                         done
 560                         return 0
 561                 fi
 562         fi
 563         return 1
 564 }
 565
 566 # This must be last line !
 567 # vi:syntax=sh