[people/arne_f/network.git] / functions.device

#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2010  Michael Tremer & Christian Schmidt                      #
#                                                                             #
# This program is free software: you can redistribute it and/or modify        #
# it under the terms of the GNU General Public License as published by        #
# the Free Software Foundation, either version 3 of the License, or           #
# (at your option) any later version.                                         #
#                                                                             #
# This program is distributed in the hope that it will be useful,             #
# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
# GNU General Public License for more details.                                #
#                                                                             #
# You should have received a copy of the GNU General Public License           #
# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
###############################################################################

function devicify() {
	local device=${1}

	assert isset device

	if device_exists ${device}; then
		echo "${device}"
		return ${EXIT_OK}
	fi

	local d
	for d in $(devices_get_all); do
		if [ "$(device_get_address ${d})" = "${device}" ]; then
			echo "${d}"
			return ${EXIT_OK}
		fi
	done

	return ${EXIT_ERROR}
}

function macify() {
	local device=${1}

	assert isset device

	if mac_is_valid ${device}; then
		echo "${device}"
		return ${EXIT_OK}
	fi

	if device_exists ${device}; then
		device_get_address ${device}
		return ${EXIT_OK}
	fi

	return ${EXIT_ERROR}
}

# Check if the device exists
function device_exists() {
	local device=${1}

	# If device name was not found, exit.
	[ -n "${device}" ] || return ${EXIT_ERROR}

	[ -d "${SYS_CLASS_NET}/${device}" ]
}

# Check if the device is up
function device_is_up() {
	local device=${1}

	device_exists ${device} || return ${EXIT_ERROR}

	ip link show ${device} 2>/dev/null | grep -qE "<.*UP.*>"
}

# Check if the device is a bonding device
function device_is_bonding() {
	[ -d "/sys/class/net/${1}/bonding" ]
}

# Check if the device bonded in a bonding device
function device_is_bonded() {
	local device=${1}

	[ -d "${SYS_CLASS_NET}/${device}/master" ]
}

# Check if the device is a bridge
function device_is_bridge() {
	[ -d "/sys/class/net/${1}/bridge" ]
}

function device_is_bridge_attached() {
	local device=${1}

	[ -d "${SYS_CLASS_NET}/${device}/brport" ]
}

# Check if the device is a virtual device
function device_is_virtual() {
	local device=${1}

	[ -e "/proc/net/vlan/${device}" ]
}

# Check if the device has virtual devices
function device_has_virtuals() {
	local device=${1}

	if device_is_virtual ${device}; then
		return 1
	fi

	if [ ! -e "/proc/net/vlan/config" ]; then
		return 1
	fi
	grep -q "${1}$" /proc/net/vlan/config
}

# Check if the device is a ppp device
function device_is_ppp() {
	local device=${1}

	ip link show ${device} 2>/dev/null | grep -qE "<.*POINTOPOINT.*>"
}

# Check if the device is a loopback device
function device_is_loopback() {
	local device=$(devicify ${1})
	[ "${device}" = "lo" ]
}

# Check if the device is a physical network interface
function device_is_real() {
	local device=${1}

	device_is_loopback ${device} && \
		return ${EXIT_ERROR}

	device_is_bonding ${device} &&  \
		return ${EXIT_ERROR}

	device_is_bridge ${device} && \
		return ${EXIT_ERROR}

	device_is_ppp ${device} && \
		return ${EXIT_ERROR}

	device_is_virtual ${device} && \
		return ${EXIT_ERROR}

	[ "$(__device_get_file ${device} type)" != "1" ] && \
		return ${EXIT_ERROR}

	return ${EXIT_OK}
}

# Get the device type
function device_get_type() {
	local device=$(devicify ${1})

	if device_is_virtual ${device}; then
		echo "vlan"

	elif device_is_bonding ${device}; then
		echo "bonding"

	elif device_is_bridge ${device}; then
		echo "bridge"

	elif device_is_ppp ${device}; then
		echo "ppp"

	elif device_is_loopback ${device}; then
		echo "loopback"

	elif device_is_real ${device}; then
		echo "real"

	else
		echo "unknown"
	fi
}

function device_get_status() {
	local device=${1}

	assert isset device

	local status=${STATUS_UNKNOWN}

	if ! device_has_carrier ${device}; then
		status=${STATUS_NOCARRIER}
	elif device_is_up ${device}; then
		status=${STATUS_UP}
	elif device_is_down ${device}; then
		status=${STATUS_DOWN}
	fi

	assert isset status

	echo "${status}"
}

function device_get_address() {
	local device=${1}

	cat ${SYS_CLASS_NET}/${device}/address 2>/dev/null
}

function device_set_address() {
	local device=${1}
	local addr=${2}
	
	if ! device_exists ${device}; then
		error "Device '${device}' does not exist."
		return ${EXIT_ERROR}
	fi

	log INFO "Setting address of '${device}' to '${addr}' - was $(device_get_address ${device})."

	local up
	if device_is_up ${device}; then
		device_set_down ${device}
		up=1
	fi

	ip link set ${device} address ${addr}
	local ret=$?

	if [ "${up}" = "1" ]; then
		device_set_up ${device}
	fi

	if [ "${ret}" != "0" ]; then
		error_log "Could not set address '${addr}' on device '${device}'."
	fi

	return ${ret}
}

function device_get() {
	local device
	local devices

	for device in ${SYS_CLASS_NET}/*; do
		device=$(basename ${device})

		# bonding_masters is no device
		[ "${device}" = "bonding_masters" ] && continue

		devices="${devices} ${device}"
	done

	echo ${devices}
	return ${EXIT_OK}
}

function devices_get_all() {
	device_get
}

# Check if a device has a cable plugged in
function device_has_carrier() {
	local device=$(devicify ${1})
	[ "$(<${SYS_CLASS_NET}/${device}/carrier)" = "1" ]
}

function device_is_promisc() {
	local device=${1}

	ip link show ${device} | grep -qE "<.*PROMISC.*>"
}

function device_set_promisc() {
	local device=${1}
	local state=${2}

	assert device_exists ${device}
	assert isset state
	assert isoneof state on off

	ip link set ${device} promisc ${state}
}

# Check if the device is free
function device_is_free() {
	! device_is_used $@
}

# Check if the device is used
function device_is_used() {
	local device=$(devicify ${1})

	device_has_virtuals ${device} && \
		return ${EXIT_OK}
	device_is_bonded ${device} && \
		return ${EXIT_OK}
	device_is_bridge_attached ${device} && \
		return ${EXIT_OK}

	return ${EXIT_ERROR}
}

function device_hash() {
	local device=${1}

	# Get mac address of device and remove all colons (:)
	# that will result in a hash.
	device=$(macify ${device})

	echo "${device//:/}"
}

# Give the device a new name
function device_set_name() {
	local source=$1
	local destination=${2}

	# Check if devices exists
	if ! device_exists ${source} || device_exists ${destination}; then
		return 4
	fi

	local up
	if device_is_up ${source}; then
		ip link set ${source} down
		up=1
	fi

	ip link set ${source} name ${destination}

	if [ "${up}" = "1" ]; then
		ip link set ${destination} up
	fi
}

# Set device up
function device_set_up() {
	local device=$(devicify ${1})

	# Silently fail if device was not found
	[ -z "${device}" ] && return ${EXIT_ERROR}

	# Do nothing if device is already up
	device_is_up ${device} && return ${EXIT_OK}

	device_set_parent_up ${device}

	log DEBUG "Setting up device '${device}'"

	ip link set ${device} up
}

function device_set_parent_up() {
	local device=${1}
	local parent

	if device_is_virtual ${device}; then
		parent=$(virtual_get_parent ${device})

		device_is_up ${parent} && return ${EXIT_OK}

		log DEBUG "Setting up parent device '${parent}' of '${device}'"

		device_set_up ${parent}
		return $?
	fi

	return ${EXIT_OK}
}

# Set device down
function device_set_down() {
	local device=$(devicify ${1})

	local ret=${EXIT_OK}

	if device_is_up ${device}; then
		log DEBUG "Tearing down device '${device}'"

		ip link set ${device} down
		ret=$?
	fi

	device_set_parent_down ${device}

	return ${ret}
}

function device_set_parent_down() {
	local device=${1}
	local parent

	if device_is_virtual ${device}; then
		parent=$(virtual_get_parent ${device})

		device_is_up ${parent} || return ${EXIT_OK}

		if device_is_free ${parent}; then
			log DEBUG "Tearing down parent device '${parent}' of '${device}'"

			device_set_down ${parent}
		fi
	fi
	
	return ${EXIT_OK}
}

function device_get_mtu() {
	local device=${1}

	if ! device_exists ${device}; then
		error "Device '${device}' does not exist."
		return ${EXIT_ERROR}
	fi

	echo $(<${SYS_CLASS_NET}/${device}/mtu)
}

# Set mtu to a device
function device_set_mtu() {
	local device=${1}
	local mtu=${2}

	if ! device_exists ${device}; then
		error "Device '${device}' does not exist."
		return ${EXIT_ERROR}
	fi
	
	local oldmtu=$(device_get_mtu ${device})

	if [ "${oldmtu}" = "${mtu}" ]; then
		# No need to set mtu.
		return ${EXIT_OK}
	fi

	log INFO "Setting mtu of '${device}' to '${mtu}' - was ${oldmtu}."

	local up
	if device_is_up ${device}; then
		device_set_down ${device}
		up=1
	fi

	ip link set ${device} mtu ${mtu}
	local ret=$?

	if [ "${up}" = "1" ]; then
		device_set_up ${device}
	fi

	if [ "${ret}" != "0" ]; then
		error_log "Could not set mtu '${mtu}' on device '${device}'."
	fi

	return ${ret}
}

function device_discover() {
	local device=${1}

	log INFO "Running discovery process on device '${device}'."

	local hook
	for hook in $(hook_zone_get_all); do
		hook_zone_exec ${hook} discover ${device}
	done
}

function device_has_ipv4() {
	local device=${1}
	local addr=${2}

	if ! device_exists ${device}; then
		error "Device '${device}' does not exist."
		return ${EXIT_ERROR}
	fi

	ip addr show ${device} | grep -q -e "inet " -e "${addr}"
}

function device_has_ipv6() {
	local device=${1}
	local addr=${2}

	if ! device_exists ${device}; then
		error "Device '${device}' does not exist."
		return ${EXIT_ERROR}
	fi

	local prefix=${addr##*/}
	addr=$(ipv6_implode ${addr%%/*})

	if [ -n "${prefix}" ]; then
		addr="${addr}/${prefix}"
	fi

	ip addr show ${device} | grep -q "inet6 ${addr}"
}

function __device_get_file() {
	local device=${1}
	local file=${2}

	assert isset device
	assert isset file

	cat ${SYS_CLASS_NET}/${device}/${file}
}

function device_get_rx_bytes() {
	local device=${1}

	__device_get_file ${device} statistics/rx_bytes
}

function device_get_tx_bytes() {
	local device=${1}

	__device_get_file ${device} statistics/tx_bytes
}

function device_get_rx_packets() {
	local device=${1}

	__device_get_file ${device} statistics/rx_packets
}

function device_get_tx_packets() {
	local device=${1}

	__device_get_file ${device} statistics/tx_packets
}

function device_get_rx_errors() {
	local device=${1}

	__device_get_file ${device} statistics/rx_errors
}

function device_get_tx_errors() {
	local device=${1}

	__device_get_file ${device} statistics/tx_errors
}
Commit	Line	Data
1848564d MT	1	#!/bin/bash
	2	###############################################################################
	3	# #
	4	# IPFire.org - A linux based firewall #
	5	# Copyright (C) 2010 Michael Tremer & Christian Schmidt #
	6	# #
	7	# This program is free software: you can redistribute it and/or modify #
	8	# it under the terms of the GNU General Public License as published by #
	9	# the Free Software Foundation, either version 3 of the License, or #
	10	# (at your option) any later version. #
	11	# #
	12	# This program is distributed in the hope that it will be useful, #
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of #
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
	15	# GNU General Public License for more details. #
	16	# #
	17	# You should have received a copy of the GNU General Public License #
	18	# along with this program. If not, see <http://www.gnu.org/licenses/>. #
	19	# #
	20	###############################################################################
	21
1b7a1578	22	function devicify() {
1848564d MT	23	local device=${1}
1848564d MT	24
711ffac1 MT	25	assert isset device
711ffac1 MT	26
1848564d MT	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
711ffac1 MT	46	assert isset device
711ffac1 MT	47
1848564d MT	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() {
711ffac1	87	local device=${1}
1848564d	88
711ffac1	89	[ -d "${SYS_CLASS_NET}/${device}/master" ]
1848564d MT	90	}
	91
	92	# Check if the device is a bridge
	93	function device_is_bridge() {
	94	[ -d "/sys/class/net/${1}/bridge" ]
	95	}
	96
81ed640c MT	97	function device_is_bridge_attached() {
	98	local device=${1}
	99
	100	[ -d "${SYS_CLASS_NET}/${device}/brport" ]
	101	}
	102
1848564d MT	103	# Check if the device is a virtual device
	104	function device_is_virtual() {
	105	local device=${1}
	106
	107	[ -e "/proc/net/vlan/${device}" ]
	108	}
	109
	110	# Check if the device has virtual devices
	111	function device_has_virtuals() {
fb02e543 MT	112	local device=${1}
	113
	114	if device_is_virtual ${device}; then
	115	return 1
	116	fi
	117
1848564d MT	118	if [ ! -e "/proc/net/vlan/config" ]; then
	119	return 1
	120	fi
	121	grep -q "${1}$" /proc/net/vlan/config
	122	}
	123
1848564d MT	124	# Check if the device is a ppp device
	125	function device_is_ppp() {
	126	local device=${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 ${EXIT_ERROR}
	155
419b4cd0 MT	156	[ "$(__device_get_file ${device} type)" != "1" ] && \
	157	return ${EXIT_ERROR}
	158
1848564d MT	159	return ${EXIT_OK}
	160	}
	161
	162	# Get the device type
	163	function device_get_type() {
	164	local device=$(devicify ${1})
	165
8c6a8966	166	if device_is_virtual ${device}; then
1848564d MT	167	echo "vlan"
	168
	169	elif device_is_bonding ${device}; then
	170	echo "bonding"
	171
	172	elif device_is_bridge ${device}; then
	173	echo "bridge"
	174
	175	elif device_is_ppp ${device}; then
	176	echo "ppp"
	177
	178	elif device_is_loopback ${device}; then
	179	echo "loopback"
	180
	181	elif device_is_real ${device}; then
	182	echo "real"
	183
	184	else
	185	echo "unknown"
	186	fi
	187	}
	188
711ffac1 MT	189	function device_get_status() {
	190	local device=${1}
	191
	192	assert isset device
	193
	194	local status=${STATUS_UNKNOWN}
	195
	196	if ! device_has_carrier ${device}; then
	197	status=${STATUS_NOCARRIER}
	198	elif device_is_up ${device}; then
	199	status=${STATUS_UP}
	200	elif device_is_down ${device}; then
	201	status=${STATUS_DOWN}
	202	fi
	203
	204	assert isset status
	205
	206	echo "${status}"
	207	}
	208
1848564d MT	209	function device_get_address() {
	210	local device=${1}
	211
	212	cat ${SYS_CLASS_NET}/${device}/address 2>/dev/null
	213	}
	214
	215	function device_set_address() {
1b7a1578 MT	216	local device=${1}
	217	local addr=${2}
	218
	219	if ! device_exists ${device}; then
	220	error "Device '${device}' does not exist."
	221	return ${EXIT_ERROR}
	222	fi
	223
	224	log INFO "Setting address of '${device}' to '${addr}' - was $(device_get_address ${device})."
	225
	226	local up
	227	if device_is_up ${device}; then
	228	device_set_down ${device}
	229	up=1
	230	fi
	231
	232	ip link set ${device} address ${addr}
	233	local ret=$?
	234
	235	if [ "${up}" = "1" ]; then
	236	device_set_up ${device}
	237	fi
	238
	239	if [ "${ret}" != "0" ]; then
	240	error_log "Could not set address '${addr}' on device '${device}'."
	241	fi
	242
	243	return ${ret}
1848564d MT	244	}
1848564d MT	245
711ffac1	246	function device_get() {
2ae0fb8d	247	local device
711ffac1 MT	248	local devices
711ffac1 MT	249
2ae0fb8d MT	250	for device in ${SYS_CLASS_NET}/*; do
2ae0fb8d MT	251	device=$(basename ${device})
711ffac1	252
2ae0fb8d MT	253	# bonding_masters is no device
	254	[ "${device}" = "bonding_masters" ] && continue
	255
	256	devices="${devices} ${device}"
	257	done
711ffac1 MT	258
	259	echo ${devices}
	260	return ${EXIT_OK}
	261	}
	262
1848564d	263	function devices_get_all() {
711ffac1	264	device_get
1848564d MT	265	}
	266
	267	# Check if a device has a cable plugged in
	268	function device_has_carrier() {
	269	local device=$(devicify ${1})
	270	[ "$(<${SYS_CLASS_NET}/${device}/carrier)" = "1" ]
	271	}
	272
1e4c26a4 MT	273	function device_is_promisc() {
	274	local device=${1}
	275
	276	ip link show ${device} \| grep -qE "<.PROMISC.>"
	277	}
	278
cf6e4606 MT	279	function device_set_promisc() {
	280	local device=${1}
	281	local state=${2}
	282
	283	assert device_exists ${device}
	284	assert isset state
	285	assert isoneof state on off
	286
	287	ip link set ${device} promisc ${state}
	288	}
	289
1848564d MT	290	# Check if the device is free
1848564d MT	291	function device_is_free() {
81ed640c	292	! device_is_used $@
1848564d MT	293	}
	294
	295	# Check if the device is used
	296	function device_is_used() {
	297	local device=$(devicify ${1})
	298
fb02e543 MT	299	device_has_virtuals ${device} && \
fb02e543 MT	300	return ${EXIT_OK}
1848564d	301	device_is_bonded ${device} && \
fb02e543	302	return ${EXIT_OK}
81ed640c MT	303	device_is_bridge_attached ${device} && \
81ed640c MT	304	return ${EXIT_OK}
1848564d	305
fb02e543	306	return ${EXIT_ERROR}
1848564d MT	307	}
1848564d MT	308
1b7a1578 MT	309	function device_hash() {
	310	local device=${1}
	311
37e4ec8b MT	312	# Get mac address of device and remove all colons (:)
	313	# that will result in a hash.
	314	device=$(macify ${device})
	315
	316	echo "${device//:/}"
1b7a1578 MT	317	}
	318
	319	# Give the device a new name
	320	function device_set_name() {
1848564d	321	local source=$1
1578dae9	322	local destination=${2}
1848564d MT	323
	324	# Check if devices exists
	325	if ! device_exists ${source} \|\| device_exists ${destination}; then
	326	return 4
	327	fi
	328
	329	local up
	330	if device_is_up ${source}; then
	331	ip link set ${source} down
	332	up=1
	333	fi
	334
	335	ip link set ${source} name ${destination}
	336
	337	if [ "${up}" = "1" ]; then
	338	ip link set ${destination} up
	339	fi
	340	}
	341
1848564d MT	342	# Set device up
	343	function device_set_up() {
	344	local device=$(devicify ${1})
	345
711ffac1 MT	346	# Silently fail if device was not found
	347	[ -z "${device}" ] && return ${EXIT_ERROR}
	348
1848564d MT	349	# Do nothing if device is already up
	350	device_is_up ${device} && return ${EXIT_OK}
	351
81ed640c MT	352	device_set_parent_up ${device}
	353
	354	log DEBUG "Setting up device '${device}'"
	355
1848564d MT	356	ip link set ${device} up
	357	}
	358
81ed640c MT	359	function device_set_parent_up() {
	360	local device=${1}
	361	local parent
	362
	363	if device_is_virtual ${device}; then
8c6a8966	364	parent=$(virtual_get_parent ${device})
81ed640c MT	365
	366	device_is_up ${parent} && return ${EXIT_OK}
	367
	368	log DEBUG "Setting up parent device '${parent}' of '${device}'"
	369
	370	device_set_up ${parent}
	371	return $?
	372	fi
	373
	374	return ${EXIT_OK}
	375	}
	376
1848564d MT	377	# Set device down
	378	function device_set_down() {
	379	local device=$(devicify ${1})
	380
81ed640c MT	381	local ret=${EXIT_OK}
	382
	383	if device_is_up ${device}; then
	384	log DEBUG "Tearing down device '${device}'"
	385
	386	ip link set ${device} down
	387	ret=$?
	388	fi
	389
	390	device_set_parent_down ${device}
1848564d	391
81ed640c MT	392	return ${ret}
	393	}
	394
	395	function device_set_parent_down() {
	396	local device=${1}
	397	local parent
	398
	399	if device_is_virtual ${device}; then
8c6a8966	400	parent=$(virtual_get_parent ${device})
81ed640c MT	401
	402	device_is_up ${parent} \|\| return ${EXIT_OK}
	403
	404	if device_is_free ${parent}; then
	405	log DEBUG "Tearing down parent device '${parent}' of '${device}'"
	406
	407	device_set_down ${parent}
	408	fi
	409	fi
	410
	411	return ${EXIT_OK}
1848564d MT	412	}
1848564d MT	413
1848564d MT	414	function device_get_mtu() {
	415	local device=${1}
	416
	417	if ! device_exists ${device}; then
	418	error "Device '${device}' does not exist."
	419	return ${EXIT_ERROR}
	420	fi
	421
f3e6fe50	422	echo $(<${SYS_CLASS_NET}/${device}/mtu)
1848564d MT	423	}
	424
	425	# Set mtu to a device
	426	function device_set_mtu() {
1b7a1578	427	local device=${1}
1848564d MT	428	local mtu=${2}
1848564d MT	429
1b7a1578 MT	430	if ! device_exists ${device}; then
	431	error "Device '${device}' does not exist."
	432	return ${EXIT_ERROR}
	433	fi
	434
	435	local oldmtu=$(device_get_mtu ${device})
	436
	437	if [ "${oldmtu}" = "${mtu}" ]; then
	438	# No need to set mtu.
	439	return ${EXIT_OK}
	440	fi
	441
	442	log INFO "Setting mtu of '${device}' to '${mtu}' - was ${oldmtu}."
	443
1848564d	444	local up
1b7a1578 MT	445	if device_is_up ${device}; then
1b7a1578 MT	446	device_set_down ${device}
1848564d MT	447	up=1
	448	fi
	449
1b7a1578	450	ip link set ${device} mtu ${mtu}
1848564d MT	451	local ret=$?
	452
	453	if [ "${up}" = "1" ]; then
1b7a1578 MT	454	device_set_up ${device}
	455	fi
	456
	457	if [ "${ret}" != "0" ]; then
	458	error_log "Could not set mtu '${mtu}' on device '${device}'."
1848564d MT	459	fi
	460
	461	return ${ret}
	462	}
	463
	464	function device_discover() {
	465	local device=${1}
	466
1b7a1578 MT	467	log INFO "Running discovery process on device '${device}'."
1b7a1578 MT	468
1848564d	469	local hook
d61a01d4 MT	470	for hook in $(hook_zone_get_all); do
d61a01d4 MT	471	hook_zone_exec ${hook} discover ${device}
1848564d MT	472	done
	473	}
	474
1848564d MT	475	function device_has_ipv4() {
	476	local device=${1}
	477	local addr=${2}
	478
	479	if ! device_exists ${device}; then
	480	error "Device '${device}' does not exist."
	481	return ${EXIT_ERROR}
	482	fi
	483
	484	ip addr show ${device} \| grep -q -e "inet " -e "${addr}"
	485	}
4231f419 MT	486
	487	function device_has_ipv6() {
	488	local device=${1}
	489	local addr=${2}
	490
	491	if ! device_exists ${device}; then
	492	error "Device '${device}' does not exist."
	493	return ${EXIT_ERROR}
	494	fi
	495
	496	local prefix=${addr##*/}
	497	addr=$(ipv6_implode ${addr%%/*})
	498
	499	if [ -n "${prefix}" ]; then
	500	addr="${addr}/${prefix}"
	501	fi
	502
	503	ip addr show ${device} \| grep -q "inet6 ${addr}"
	504	}
711ffac1	505
711ffac1 MT	506	function __device_get_file() {
	507	local device=${1}
	508	local file=${2}
	509
	510	assert isset device
	511	assert isset file
	512
	513	cat ${SYS_CLASS_NET}/${device}/${file}
	514	}
	515
	516	function device_get_rx_bytes() {
	517	local device=${1}
	518
	519	__device_get_file ${device} statistics/rx_bytes
	520	}
	521
	522	function device_get_tx_bytes() {
	523	local device=${1}
	524
	525	__device_get_file ${device} statistics/tx_bytes
	526	}
	527
	528	function device_get_rx_packets() {
	529	local device=${1}
	530
	531	__device_get_file ${device} statistics/rx_packets
	532	}
	533
	534	function device_get_tx_packets() {
	535	local device=${1}
	536
	537	__device_get_file ${device} statistics/tx_packets
	538	}
	539
	540	function device_get_rx_errors() {
	541	local device=${1}
	542
	543	__device_get_file ${device} statistics/rx_errors
	544	}
	545
	546	function device_get_tx_errors() {
	547	local device=${1}
	548
	549	__device_get_file ${device} statistics/tx_errors
	550	}