functions.device

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2010  Michael Tremer & Christian Schmidt                      #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 function devicify() {
  23         local device=${1}
  24
  25         if device_exists ${device}; then
  26                 echo "${device}"
  27                 return ${EXIT_OK}
  28         fi
  29
  30         local d
  31         for d in $(devices_get_all); do
  32                 if [ "$(device_get_address ${d})" = "${device}" ]; then
  33                         echo "${d}"
  34                         return ${EXIT_OK}
  35                 fi
  36         done
  37
  38         return ${EXIT_ERROR}
  39 }
  40
  41 function macify() {
  42         local device=${1}
  43
  44         if mac_is_valid ${device}; then
  45                 echo "${device}"
  46                 return ${EXIT_OK}
  47         fi
  48
  49         if device_exists ${device}; then
  50                 device_get_address ${device}
  51                 return ${EXIT_OK}
  52         fi
  53
  54         return ${EXIT_ERROR}
  55 }
  56
  57 # Check if the device exists
  58 function device_exists() {
  59         local device=${1}
  60
  61         # If device name was not found, exit.
  62         [ -n "${device}" ] || return ${EXIT_ERROR}
  63
  64         [ -d "${SYS_CLASS_NET}/${device}" ]
  65 }
  66
  67 # Check if the device is up
  68 function device_is_up() {
  69         local device=${1}
  70
  71         device_exists ${device} || return ${EXIT_ERROR}
  72
  73         ip link show ${device} 2>/dev/null | grep -qE "<.*UP.*>"
  74 }
  75
  76 # Check if the device is a bonding device
  77 function device_is_bonding() {
  78         [ -d "/sys/class/net/${1}/bonding" ]
  79 }
  80
  81 # Check if the device bonded in a bonding device
  82 function device_is_bonded() {
  83         local dev
  84         for dev in /sys/class/net/*; do
  85                 # Skip crappy files
  86                 [ -d "${dev}" ] || continue
  87
  88                 # Continue if not a bonding device
  89                 device_is_bonding "${dev##*/}" || continue
  90
  91                 if grep -q "\<${1}\>" ${dev}/bonding/slaves; then
  92                         return 0
  93                 fi
  94         done
  95
  96         return 1
  97 }
  98
  99 # Check if the device is a bridge
 100 function device_is_bridge() {
 101         [ -d "/sys/class/net/${1}/bridge" ]
 102 }
 103
 104 function device_is_bridge_attached() {
 105         local device=${1}
 106
 107         [ -d "${SYS_CLASS_NET}/${device}/brport" ]
 108 }
 109
 110 # Check if the device is a virtual device
 111 function device_is_virtual() {
 112         local device=${1}
 113
 114         [ -e "/proc/net/vlan/${device}" ]
 115 }
 116
 117 # Check if the device has virtual devices
 118 function device_has_virtuals() {
 119         local device=${1}
 120
 121         if device_is_virtual ${device}; then
 122                 return 1
 123         fi
 124
 125         if [ ! -e "/proc/net/vlan/config" ]; then
 126                 return 1
 127         fi
 128         grep -q "${1}$" /proc/net/vlan/config
 129 }
 130
 131 function device_is_vlan() { # XXX Compat function
 132         log DEBUG "Deprecated function device_is_vlan() was used."
 133
 134         device_is_virtual $@
 135 }
 136
 137 # Check if the device is a ppp device
 138 function device_is_ppp() {
 139         local device=${1}
 140
 141         ip link show ${device} 2>/dev/null | grep -qE "<.*POINTOPOINT.*>"
 142 }
 143
 144 # Check if the device is a loopback device
 145 function device_is_loopback() {
 146         local device=$(devicify ${1})
 147         [ "${device}" = "lo" ]
 148 }
 149
 150 # Check if the device is a physical network interface
 151 function device_is_real() {
 152         local device=${1}
 153
 154         device_is_loopback ${device} && \
 155                 return ${EXIT_ERROR}
 156
 157         device_is_bonding ${device} &&  \
 158                 return ${EXIT_ERROR}
 159
 160         device_is_bridge ${device} && \
 161                 return ${EXIT_ERROR}
 162
 163         device_is_ppp ${device} && \
 164                 return ${EXIT_ERROR}
 165
 166         device_is_virtual ${device} && \
 167                 return ${EXIT_ERROR}
 168
 169         return ${EXIT_OK}
 170 }
 171
 172 # Get the device type
 173 function device_get_type() {
 174         local device=$(devicify ${1})
 175
 176         if device_is_vlan ${device}; then
 177                 echo "vlan"
 178
 179         elif device_is_bonding ${device}; then
 180                 echo "bonding"
 181
 182         elif device_is_bridge ${device}; then
 183                 echo "bridge"
 184
 185         elif device_is_ppp ${device}; then
 186                 echo "ppp"
 187
 188         elif device_is_loopback ${device}; then
 189                 echo "loopback"
 190
 191         elif device_is_real ${device}; then
 192                 echo "real"
 193
 194         else
 195                 echo "unknown"
 196         fi
 197 }
 198
 199 function device_get_address() {
 200         local device=${1}
 201
 202         cat ${SYS_CLASS_NET}/${device}/address 2>/dev/null
 203 }
 204
 205 function device_set_address() {
 206         local device=${1}
 207         local addr=${2}
 208
 209         if ! device_exists ${device}; then
 210                 error "Device '${device}' does not exist."
 211                 return ${EXIT_ERROR}
 212         fi
 213
 214         log INFO "Setting address of '${device}' to '${addr}' - was $(device_get_address ${device})."
 215
 216         local up
 217         if device_is_up ${device}; then
 218                 device_set_down ${device}
 219                 up=1
 220         fi
 221
 222         ip link set ${device} address ${addr}
 223         local ret=$?
 224
 225         if [ "${up}" = "1" ]; then
 226                 device_set_up ${device}
 227         fi
 228
 229         if [ "${ret}" != "0" ]; then
 230                 error_log "Could not set address '${addr}' on device '${device}'."
 231         fi
 232
 233         return ${ret}
 234 }
 235
 236 function devices_get_all() {
 237         local device
 238         for device in ${SYS_CLASS_NET}/*; do
 239                 echo "$(basename ${device})"
 240         done | sort
 241 }
 242
 243 # Check if a device has a cable plugged in
 244 function device_has_carrier() {
 245         local device=$(devicify ${1})
 246         [ "$(<${SYS_CLASS_NET}/${device}/carrier)" = "1" ]
 247 }
 248
 249 # Check if the device is free
 250 function device_is_free() {
 251         ! device_is_used $@
 252 }
 253
 254 # Check if the device is used
 255 function device_is_used() {
 256         local device=$(devicify ${1})
 257
 258         device_has_virtuals ${device} && \
 259                 return ${EXIT_OK}
 260         device_is_bonded ${device} && \
 261                 return ${EXIT_OK}
 262         device_is_bridge_attached ${device} && \
 263                 return ${EXIT_OK}
 264
 265         return ${EXIT_ERROR}
 266 }
 267
 268 # XXX to be removed I think
 269 function device_get_free() {
 270         local destination=${1}
 271
 272         # Replace + by a valid number
 273         if grep -q "+$" <<<${destination}; then
 274                 local number=0
 275                 destination=$(sed -e "s/+//" <<<$destination)
 276                 while [ "${number}" -le "100" ]; do
 277                         if ! device_exists "${destination}${number}"; then
 278                                 destination="${destination}${number}"
 279                                 break
 280                         fi
 281                         number=$(($number + 1))
 282                 done
 283         fi
 284         echo "${destination}"
 285 }
 286
 287 function device_rename() {
 288         warning_log "Called deprecated function 'device_rename'"
 289
 290         device_set_name $@
 291 }
 292
 293 function device_hash() {
 294         local device=${1}
 295
 296         macify ${device} | tr -d ':'
 297 }
 298
 299 # Give the device a new name
 300 function device_set_name() {
 301         local source=$1
 302         local destination=$(device_get_free ${2})
 303
 304         # Check if devices exists
 305         if ! device_exists ${source} || device_exists ${destination}; then
 306                 return 4
 307         fi
 308
 309         local up
 310         if device_is_up ${source}; then
 311                 ip link set ${source} down
 312                 up=1
 313         fi
 314
 315         ip link set ${source} name ${destination}
 316
 317         if [ "${up}" = "1" ]; then
 318                 ip link set ${destination} up
 319         fi
 320 }
 321
 322 # Set device up
 323 function device_set_up() {
 324         local device=$(devicify ${1})
 325
 326         # Do nothing if device is already up
 327         device_is_up ${device} && return ${EXIT_OK}
 328
 329         device_set_parent_up ${device}
 330
 331         log DEBUG "Setting up device '${device}'"
 332
 333         ip link set ${device} up
 334 }
 335
 336 function device_set_parent_up() {
 337         local device=${1}
 338         local parent
 339
 340         if device_is_virtual ${device}; then
 341                 parent=$(device_virtual_get_parent ${device})
 342
 343                 device_is_up ${parent} && return ${EXIT_OK}
 344
 345                 log DEBUG "Setting up parent device '${parent}' of '${device}'"
 346
 347                 device_set_up ${parent}
 348                 return $?
 349         fi
 350
 351         return ${EXIT_OK}
 352 }
 353
 354 # Set device down
 355 function device_set_down() {
 356         local device=$(devicify ${1})
 357
 358         local ret=${EXIT_OK}
 359
 360         if device_is_up ${device}; then
 361                 log DEBUG "Tearing down device '${device}'"
 362
 363                 ip link set ${device} down
 364                 ret=$?
 365         fi
 366
 367         device_set_parent_down ${device}
 368
 369         return ${ret}
 370 }
 371
 372 function device_set_parent_down() {
 373         local device=${1}
 374         local parent
 375
 376         if device_is_virtual ${device}; then
 377                 parent=$(device_virtual_get_parent ${device})
 378
 379                 device_is_up ${parent} || return ${EXIT_OK}
 380
 381                 if device_is_free ${parent}; then
 382                         log DEBUG "Tearing down parent device '${parent}' of '${device}'"
 383
 384                         device_set_down ${parent}
 385                 fi
 386         fi
 387
 388         return ${EXIT_OK}
 389 }
 390
 391 function device_get_mtu() {
 392         local device=${1}
 393
 394         if ! device_exists ${device}; then
 395                 error "Device '${device}' does not exist."
 396                 return ${EXIT_ERROR}
 397         fi
 398
 399         cat ${SYS_CLASS_NET}/${device}/mtu
 400 }
 401
 402 # Set mtu to a device
 403 function device_set_mtu() {
 404         local device=${1}
 405         local mtu=${2}
 406
 407         if ! device_exists ${device}; then
 408                 error "Device '${device}' does not exist."
 409                 return ${EXIT_ERROR}
 410         fi
 411
 412         local oldmtu=$(device_get_mtu ${device})
 413
 414         if [ "${oldmtu}" = "${mtu}" ]; then
 415                 # No need to set mtu.
 416                 return ${EXIT_OK}
 417         fi
 418
 419         log INFO "Setting mtu of '${device}' to '${mtu}' - was ${oldmtu}."
 420
 421         local up
 422         if device_is_up ${device}; then
 423                 device_set_down ${device}
 424                 up=1
 425         fi
 426
 427         ip link set ${device} mtu ${mtu}
 428         local ret=$?
 429
 430         if [ "${up}" = "1" ]; then
 431                 device_set_up ${device}
 432         fi
 433
 434         if [ "${ret}" != "0" ]; then
 435                 error_log "Could not set mtu '${mtu}' on device '${device}'."
 436         fi
 437
 438         return ${ret}
 439 }
 440
 441 function device_discover() {
 442         local device=${1}
 443
 444         log INFO "Running discovery process on device '${device}'."
 445
 446         local hook
 447         for hook in $(hooks_get_all); do
 448                 hook_exec ${hook} discover ${device}
 449         done
 450 }
 451
 452 function device_create_virtual() {
 453         log WARN "Called deprecated function device_create_virtual"
 454         device_virtual_create $@
 455 }
 456
 457 function device_virtual_create() {
 458         local port=$(devicify ${1})
 459         local vid=${2}
 460         local mac=${3}
 461         local newport=${port}v${vid}
 462
 463         if [ -z "${mac}" ]; then
 464                 mac=$(mac_generate)
 465         fi
 466
 467         log INFO "Creating virtual device '${newport}' with address '${mac}'."
 468
 469         local oldport=$(device_virtual_get_by_parent_and_vid ${port} ${vid})
 470
 471         if device_exists ${oldport}; then
 472                 local differences
 473
 474                 if [ "${oldport}" != "${newport}" ]; then
 475                         differences="${differences} name"
 476                 fi
 477                 if [ "$(device_get_address ${oldport})" != "${mac}" ]; then
 478                         differences="${differences} address"
 479                 fi
 480
 481                 echo "differences: $differences"
 482
 483                 if [ -n "${differences}" ]; then
 484                         if device_is_used ${oldport}; then
 485                                 error_log "There was a device '${oldport}' set up with VID '${vid}' and parent '${port}' which is used somewhere else. Cannot go on."
 486                                 return ${EXIT_ERROR}
 487                         else
 488                                 log DEBUG "There is a device '${oldport}' but it not used, so we grab it to ourselves."
 489                         fi
 490                 else
 491                         log DEBUG "Device '${newport}' already exists and reflects our configuration. Go on."
 492
 493                         device_set_up ${oldport}
 494                         return ${EXIT_OK}
 495                 fi
 496
 497         else
 498                 log DEBUG "Virtual device '${newport}' does not exist, yet."
 499
 500                 vconfig set_name_type DEV_PLUS_VID_NO_PAD >/dev/null
 501                 vconfig add ${port} ${vid} >/dev/null
 502
 503                 if [ $? -ne ${EXIT_OK} ]; then
 504                         error_log "Could not create virtual device '${newport}'."
 505                         return ${EXIT_ERROR}
 506                 fi
 507
 508                 oldport=$(device_virtual_get_by_parent_and_vid ${port} ${vid})
 509
 510         fi
 511
 512         assert device_exists ${oldport}
 513
 514         if ! device_exists ${oldport}; then
 515                 error "Could not determine the created virtual device '${newport}'."
 516                 return ${EXIT_ERROR}
 517         fi
 518
 519         # The device is expected to be named like ${port}.${vid}
 520         # and will be renamed to the virtual schema
 521         device_set_name ${oldport} ${newport}
 522
 523         if [ $? -ne ${EXIT_OK} ]; then
 524                 error_log "Could not set name of virtual device '${newport}'."
 525                 return ${EXIT_ERROR}
 526         fi
 527
 528         assert device_exists ${newport}
 529
 530         # Setting new mac address
 531         device_set_address ${newport} ${mac}
 532
 533         if [ $? -ne ${EXIT_OK} ]; then
 534                 error_log "Could not set address '${mac}' to virtual device '${newport}'."
 535                 return ${EXIT_ERROR}
 536         fi
 537
 538         # Bring up the new device
 539         device_set_up ${newport}
 540
 541         return ${EXIT_OK}
 542 }
 543
 544 function device_virtual_remove() {
 545         local device=$(devicify ${1})
 546
 547         log INFO "Removing virtual device '${device}' with address '$(macify ${device})'."
 548
 549         device_set_down ${device}
 550
 551         vconfig rem ${device} >/dev/null
 552
 553         if [ $? -ne ${EXIT_OK} ]; then
 554                 error_log "Could not remote virtual device '${newport}'."
 555                 return ${EXIT_ERROR}
 556         fi
 557
 558         return ${EXIT_OK}
 559 }
 560
 561 function device_virtual_get_parent() {
 562         local device=${1}
 563
 564         local parent=$(grep "^${device}" < /proc/net/vlan/config | awk '{ print $NF }')
 565
 566         if device_exists ${parent}; then
 567                 echo "${parent}"
 568                 return ${EXIT_OK}
 569         fi
 570
 571         return ${EXIT_ERROR}
 572 }
 573
 574 function device_virtual_get_by_parent_and_vid() {
 575         local parent=${1}
 576         local vid=${2}
 577
 578         local v_port
 579         local v_id
 580         local v_parent
 581
 582         fgrep '|' < /proc/net/vlan/config | tr -d '|' | \
 583                 while read v_port v_id v_parent; do
 584                         if [ "${v_parent}" = "${parent}" ] && [ "${v_id}" = "${vid}" ]; then
 585                                 echo "${v_port}"
 586                                 return ${EXIT_OK}
 587                         fi
 588                 done
 589
 590         return ${EXIT_ERROR}
 591 }
 592
 593 function device_bonding_create() {
 594         local device=${1}
 595         local mac=${2}
 596
 597         [ -z "${mac}" ] && mac=$(mac_generate)
 598
 599         log INFO "Creating bonding device '${device}' (${mac})."
 600
 601         echo "+${device}" > /sys/class/net/bonding_masters
 602         device_set_address ${mac}
 603         device_set_up ${device}
 604 }
 605
 606 function device_bonding_remove() {
 607         local device=$(devicify ${1})
 608
 609         log INFO "Remove bonding device '${device}'."
 610
 611         device_set_down ${device}
 612         echo "-${device}" > /sys/class/net/bonding_masters
 613 }
 614
 615 function bonding_set_mode() {
 616         local device=${1}
 617         local mode=${2}
 618
 619         log INFO "Setting bonding mode on '${device}' '${mode}'."
 620
 621         echo "${mode}" > /sys/class/net/${device}/bonding/mode
 622 }
 623
 624 function bonding_enslave_device() {
 625         local device=$(devicify ${1})
 626         local slave=$(devicify ${2})
 627         shift 2
 628
 629         log INFO "Enslaving slave '${slave}' to '${device}'."
 630
 631         device_set_down ${slave}
 632         echo "+${slave}" > /sys/class/net/${device}/bonding/slaves
 633 }
 634
 635 function bridge_attach_device() {
 636         local bridge=${1}
 637         local device=${2}
 638
 639         if ! device_exists ${bridge}; then
 640                 error "Bridge '${bridge}' does not exist."
 641                 return ${EXIT_ERROR}
 642         fi
 643
 644         if ! device_exists ${device}; then
 645                 error "Device '${device}' does not exist."
 646                 return ${EXIT_ERROR}
 647         fi
 648
 649         log INFO "Attaching device '${device}' to bridge '${bridge}'."
 650
 651         # XXX device_set_up ${device} # Do we need this here?
 652
 653         brctl addif ${bridge} ${device}
 654 }
 655
 656 function bridge_detach_device() {
 657         local bridge=${1}
 658         local device=${2}
 659
 660         if ! device_exists ${bridge}; then
 661                 error "Bridge '${bridge}' does not exist."
 662                 return ${EXIT_ERROR}
 663         fi
 664
 665         if ! device_exists ${device}; then
 666                 error "Device '${device}' does not exist."
 667                 return ${EXIT_ERROR}
 668         fi
 669
 670         log INFO "Detaching device '${device}' from bridge '${bridge}'."
 671
 672         brctl delif ${bridge} ${device}
 673
 674         device_set_down ${device}
 675 }
 676
 677 function bridge_is_forwarding() {
 678         local seconds=45
 679         local zone=${1}
 680
 681         bridge_has_carrier ${zone} || return ${EXIT_ERROR}
 682
 683         local device
 684         while [ ${seconds} -gt 0 ]; do
 685                 for device in ${SYS_CLASS_NET}/${zone}/brif/*; do
 686                         [ -e "${device}/state" ] || continue
 687                         if [ "$(<${device}/state)" = "3" ]; then
 688                                 return ${EXIT_OK}
 689                         fi
 690                 done
 691                 sleep 1
 692                 seconds=$((${seconds} - 1))
 693         done
 694
 695         return ${EXIT_ERROR}
 696 }
 697
 698 function bridge_has_carrier() {
 699         local zone=${1}
 700
 701         local has_carrier=${EXIT_ERROR}
 702
 703         local device
 704         for device in ${SYS_CLASS_NET}/${zone}/brif/*; do
 705                 device=$(basename ${device})
 706                 device_exists ${device} || continue
 707
 708                 device_has_carrier ${device} && has_carrier=${EXIT_OK}
 709         done
 710
 711         return ${has_carrier}
 712 }
 713
 714 function device_has_ipv4() {
 715         local device=${1}
 716         local addr=${2}
 717
 718         if ! device_exists ${device}; then
 719                 error "Device '${device}' does not exist."
 720                 return ${EXIT_ERROR}
 721         fi
 722
 723         ip addr show ${device} | grep -q -e "inet " -e "${addr}"
 724 }