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         assert isset device
  26
  27         if device_exists ${device}; then
  28                 echo "${device}"
  29                 return ${EXIT_OK}
  30         fi
  31
  32         local d
  33         for d in $(devices_get_all); do
  34                 if [ "$(device_get_address ${d})" = "${device}" ]; then
  35                         echo "${d}"
  36                         return ${EXIT_OK}
  37                 fi
  38         done
  39
  40         return ${EXIT_ERROR}
  41 }
  42
  43 function macify() {
  44         local device=${1}
  45
  46         assert isset device
  47
  48         if mac_is_valid ${device}; then
  49                 echo "${device}"
  50                 return ${EXIT_OK}
  51         fi
  52
  53         if device_exists ${device}; then
  54                 device_get_address ${device}
  55                 return ${EXIT_OK}
  56         fi
  57
  58         return ${EXIT_ERROR}
  59 }
  60
  61 # Check if the device exists
  62 function device_exists() {
  63         local device=${1}
  64
  65         # If device name was not found, exit.
  66         [ -n "${device}" ] || return ${EXIT_ERROR}
  67
  68         [ -d "${SYS_CLASS_NET}/${device}" ]
  69 }
  70
  71 # Check if the device is up
  72 function device_is_up() {
  73         local device=${1}
  74
  75         device_exists ${device} || return ${EXIT_ERROR}
  76
  77         ip link show ${device} 2>/dev/null | grep -qE "<.*UP.*>"
  78 }
  79
  80 # Check if the device is a bonding device
  81 function device_is_bonding() {
  82         [ -d "/sys/class/net/${1}/bonding" ]
  83 }
  84
  85 # Check if the device bonded in a bonding device
  86 function device_is_bonded() {
  87         local device=${1}
  88
  89         [ -d "${SYS_CLASS_NET}/${device}/master" ]
  90 }
  91
  92 # Check if the device is a bridge
  93 function device_is_bridge() {
  94         [ -d "/sys/class/net/${1}/bridge" ]
  95 }
  96
  97 function device_is_bridge_attached() {
  98         local device=${1}
  99
 100         [ -d "${SYS_CLASS_NET}/${device}/brport" ]
 101 }
 102
 103 # Check if the device is a virtual device
 104 function device_is_virtual() {
 105         local device=${1}
 106
 107         [ -e "/proc/net/vlan/${device}" ]
 108 }
 109
 110 # Check if the device has virtual devices
 111 function device_has_virtuals() {
 112         local device=${1}
 113
 114         if device_is_virtual ${device}; then
 115                 return 1
 116         fi
 117
 118         if [ ! -e "/proc/net/vlan/config" ]; then
 119                 return 1
 120         fi
 121         grep -q "${1}$" /proc/net/vlan/config
 122 }
 123
 124 # Check if the device is a ppp device
 125 function device_is_ppp() {
 126         local device=${1}
 127
 128         ip link show ${device} 2>/dev/null | grep -qE "<.*POINTOPOINT.*>"
 129 }
 130
 131 # Check if the device is a loopback device
 132 function device_is_loopback() {
 133         local device=$(devicify ${1})
 134         [ "${device}" = "lo" ]
 135 }
 136
 137 # Check if the device is a physical network interface
 138 function device_is_real() {
 139         local device=${1}
 140
 141         device_is_loopback ${device} && \
 142                 return ${EXIT_ERROR}
 143
 144         device_is_bonding ${device} &&  \
 145                 return ${EXIT_ERROR}
 146
 147         device_is_bridge ${device} && \
 148                 return ${EXIT_ERROR}
 149
 150         device_is_ppp ${device} && \
 151                 return ${EXIT_ERROR}
 152
 153         device_is_virtual ${device} && \
 154                 return ${EXIT_ERROR}
 155
 156         return ${EXIT_OK}
 157 }
 158
 159 # Get the device type
 160 function device_get_type() {
 161         local device=$(devicify ${1})
 162
 163         if device_is_virtual ${device}; then
 164                 echo "vlan"
 165
 166         elif device_is_bonding ${device}; then
 167                 echo "bonding"
 168
 169         elif device_is_bridge ${device}; then
 170                 echo "bridge"
 171
 172         elif device_is_ppp ${device}; then
 173                 echo "ppp"
 174
 175         elif device_is_loopback ${device}; then
 176                 echo "loopback"
 177
 178         elif device_is_real ${device}; then
 179                 echo "real"
 180
 181         else
 182                 echo "unknown"
 183         fi
 184 }
 185
 186 function device_get_status() {
 187         local device=${1}
 188
 189         assert isset device
 190
 191         local status=${STATUS_UNKNOWN}
 192
 193         if ! device_has_carrier ${device}; then
 194                 status=${STATUS_NOCARRIER}
 195         elif device_is_up ${device}; then
 196                 status=${STATUS_UP}
 197         elif device_is_down ${device}; then
 198                 status=${STATUS_DOWN}
 199         fi
 200
 201         assert isset status
 202
 203         echo "${status}"
 204 }
 205
 206 function device_get_address() {
 207         local device=${1}
 208
 209         cat ${SYS_CLASS_NET}/${device}/address 2>/dev/null
 210 }
 211
 212 function device_set_address() {
 213         local device=${1}
 214         local addr=${2}
 215
 216         if ! device_exists ${device}; then
 217                 error "Device '${device}' does not exist."
 218                 return ${EXIT_ERROR}
 219         fi
 220
 221         log INFO "Setting address of '${device}' to '${addr}' - was $(device_get_address ${device})."
 222
 223         local up
 224         if device_is_up ${device}; then
 225                 device_set_down ${device}
 226                 up=1
 227         fi
 228
 229         ip link set ${device} address ${addr}
 230         local ret=$?
 231
 232         if [ "${up}" = "1" ]; then
 233                 device_set_up ${device}
 234         fi
 235
 236         if [ "${ret}" != "0" ]; then
 237                 error_log "Could not set address '${addr}' on device '${device}'."
 238         fi
 239
 240         return ${ret}
 241 }
 242
 243 function device_get() {
 244         local device
 245         local devices
 246
 247         for device in ${SYS_CLASS_NET}/*; do
 248                 device=$(basename ${device})
 249
 250                 # bonding_masters is no device
 251                 [ "${device}" = "bonding_masters" ] && continue
 252
 253                 devices="${devices} ${device}"
 254         done
 255
 256         echo ${devices}
 257         return ${EXIT_OK}
 258 }
 259
 260 function devices_get_all() {
 261         device_get
 262 }
 263
 264 # Check if a device has a cable plugged in
 265 function device_has_carrier() {
 266         local device=$(devicify ${1})
 267         [ "$(<${SYS_CLASS_NET}/${device}/carrier)" = "1" ]
 268 }
 269
 270 function device_is_promisc() {
 271         local device=${1}
 272
 273         ip link show ${device} | grep -qE "<.*PROMISC.*>"
 274 }
 275
 276 # Check if the device is free
 277 function device_is_free() {
 278         ! device_is_used $@
 279 }
 280
 281 # Check if the device is used
 282 function device_is_used() {
 283         local device=$(devicify ${1})
 284
 285         device_has_virtuals ${device} && \
 286                 return ${EXIT_OK}
 287         device_is_bonded ${device} && \
 288                 return ${EXIT_OK}
 289         device_is_bridge_attached ${device} && \
 290                 return ${EXIT_OK}
 291
 292         return ${EXIT_ERROR}
 293 }
 294
 295 # XXX to be removed I think
 296 function device_get_free() {
 297         local destination=${1}
 298
 299         # Replace + by a valid number
 300         if grep -q "+$" <<<${destination}; then
 301                 local number=0
 302                 destination=$(sed -e "s/+//" <<<$destination)
 303                 while [ "${number}" -le "100" ]; do
 304                         if ! device_exists "${destination}${number}"; then
 305                                 destination="${destination}${number}"
 306                                 break
 307                         fi
 308                         number=$(($number + 1))
 309                 done
 310         fi
 311         echo "${destination}"
 312 }
 313
 314 function device_hash() {
 315         local device=${1}
 316
 317         # Get mac address of device and remove all colons (:)
 318         # that will result in a hash.
 319         device=$(macify ${device})
 320
 321         echo "${device//:/}"
 322 }
 323
 324 # Give the device a new name
 325 function device_set_name() {
 326         local source=$1
 327         local destination=$(device_get_free ${2})
 328
 329         # Check if devices exists
 330         if ! device_exists ${source} || device_exists ${destination}; then
 331                 return 4
 332         fi
 333
 334         local up
 335         if device_is_up ${source}; then
 336                 ip link set ${source} down
 337                 up=1
 338         fi
 339
 340         ip link set ${source} name ${destination}
 341
 342         if [ "${up}" = "1" ]; then
 343                 ip link set ${destination} up
 344         fi
 345 }
 346
 347 # Set device up
 348 function device_set_up() {
 349         local device=$(devicify ${1})
 350
 351         # Silently fail if device was not found
 352         [ -z "${device}" ] && return ${EXIT_ERROR}
 353
 354         # Do nothing if device is already up
 355         device_is_up ${device} && return ${EXIT_OK}
 356
 357         device_set_parent_up ${device}
 358
 359         log DEBUG "Setting up device '${device}'"
 360
 361         ip link set ${device} up
 362 }
 363
 364 function device_set_parent_up() {
 365         local device=${1}
 366         local parent
 367
 368         if device_is_virtual ${device}; then
 369                 parent=$(virtual_get_parent ${device})
 370
 371                 device_is_up ${parent} && return ${EXIT_OK}
 372
 373                 log DEBUG "Setting up parent device '${parent}' of '${device}'"
 374
 375                 device_set_up ${parent}
 376                 return $?
 377         fi
 378
 379         return ${EXIT_OK}
 380 }
 381
 382 # Set device down
 383 function device_set_down() {
 384         local device=$(devicify ${1})
 385
 386         local ret=${EXIT_OK}
 387
 388         if device_is_up ${device}; then
 389                 log DEBUG "Tearing down device '${device}'"
 390
 391                 ip link set ${device} down
 392                 ret=$?
 393         fi
 394
 395         device_set_parent_down ${device}
 396
 397         return ${ret}
 398 }
 399
 400 function device_set_parent_down() {
 401         local device=${1}
 402         local parent
 403
 404         if device_is_virtual ${device}; then
 405                 parent=$(virtual_get_parent ${device})
 406
 407                 device_is_up ${parent} || return ${EXIT_OK}
 408
 409                 if device_is_free ${parent}; then
 410                         log DEBUG "Tearing down parent device '${parent}' of '${device}'"
 411
 412                         device_set_down ${parent}
 413                 fi
 414         fi
 415
 416         return ${EXIT_OK}
 417 }
 418
 419 function device_get_mtu() {
 420         local device=${1}
 421
 422         if ! device_exists ${device}; then
 423                 error "Device '${device}' does not exist."
 424                 return ${EXIT_ERROR}
 425         fi
 426
 427         echo $(<${SYS_CLASS_NET}/${device}/mtu)
 428 }
 429
 430 # Set mtu to a device
 431 function device_set_mtu() {
 432         local device=${1}
 433         local mtu=${2}
 434
 435         if ! device_exists ${device}; then
 436                 error "Device '${device}' does not exist."
 437                 return ${EXIT_ERROR}
 438         fi
 439
 440         local oldmtu=$(device_get_mtu ${device})
 441
 442         if [ "${oldmtu}" = "${mtu}" ]; then
 443                 # No need to set mtu.
 444                 return ${EXIT_OK}
 445         fi
 446
 447         log INFO "Setting mtu of '${device}' to '${mtu}' - was ${oldmtu}."
 448
 449         local up
 450         if device_is_up ${device}; then
 451                 device_set_down ${device}
 452                 up=1
 453         fi
 454
 455         ip link set ${device} mtu ${mtu}
 456         local ret=$?
 457
 458         if [ "${up}" = "1" ]; then
 459                 device_set_up ${device}
 460         fi
 461
 462         if [ "${ret}" != "0" ]; then
 463                 error_log "Could not set mtu '${mtu}' on device '${device}'."
 464         fi
 465
 466         return ${ret}
 467 }
 468
 469 function device_discover() {
 470         local device=${1}
 471
 472         log INFO "Running discovery process on device '${device}'."
 473
 474         local hook
 475         for hook in $(hook_zone_get_all); do
 476                 hook_zone_exec ${hook} discover ${device}
 477         done
 478 }
 479
 480 function device_has_ipv4() {
 481         local device=${1}
 482         local addr=${2}
 483
 484         if ! device_exists ${device}; then
 485                 error "Device '${device}' does not exist."
 486                 return ${EXIT_ERROR}
 487         fi
 488
 489         ip addr show ${device} | grep -q -e "inet " -e "${addr}"
 490 }
 491
 492 function device_has_ipv6() {
 493         local device=${1}
 494         local addr=${2}
 495
 496         if ! device_exists ${device}; then
 497                 error "Device '${device}' does not exist."
 498                 return ${EXIT_ERROR}
 499         fi
 500
 501         local prefix=${addr##*/}
 502         addr=$(ipv6_implode ${addr%%/*})
 503
 504         if [ -n "${prefix}" ]; then
 505                 addr="${addr}/${prefix}"
 506         fi
 507
 508         ip addr show ${device} | grep -q "inet6 ${addr}"
 509 }
 510
 511 function __device_get_file() {
 512         local device=${1}
 513         local file=${2}
 514
 515         assert isset device
 516         assert isset file
 517
 518         cat ${SYS_CLASS_NET}/${device}/${file}
 519 }
 520
 521 function device_get_rx_bytes() {
 522         local device=${1}
 523
 524         __device_get_file ${device} statistics/rx_bytes
 525 }
 526
 527 function device_get_tx_bytes() {
 528         local device=${1}
 529
 530         __device_get_file ${device} statistics/tx_bytes
 531 }
 532
 533 function device_get_rx_packets() {
 534         local device=${1}
 535
 536         __device_get_file ${device} statistics/rx_packets
 537 }
 538
 539 function device_get_tx_packets() {
 540         local device=${1}
 541
 542         __device_get_file ${device} statistics/tx_packets
 543 }
 544
 545 function device_get_rx_errors() {
 546         local device=${1}
 547
 548         __device_get_file ${device} statistics/rx_errors
 549 }
 550
 551 function device_get_tx_errors() {
 552         local device=${1}
 553
 554         __device_get_file ${device} statistics/tx_errors
 555 }